Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1 | /* libFLAC - Free Lossless Audio Codec library |
| 2 | * Copyright (C) 2001,2002 Josh Coalson |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Library General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Library General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Library General Public |
| 15 | * License along with this library; if not, write to the |
| 16 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 17 | * Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 20 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 21 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 22 | #include <errno.h> |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 23 | #endif |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | #if defined _MSC_VER || defined __MINGW32__ |
| 29 | #include <sys/utime.h> /* for utime() */ |
| 30 | #include <io.h> /* for chmod() */ |
| 31 | #else |
| 32 | #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */ |
| 33 | #include <utime.h> /* for utime() */ |
| 34 | #include <unistd.h> /* for chown(), unlink() */ |
| 35 | #endif |
| 36 | #include <sys/stat.h> /* for stat(), maybe chmod() */ |
| 37 | |
Josh Coalson | 90ced91 | 2002-05-30 05:23:38 +0000 | [diff] [blame] | 38 | #include "private/metadata.h" |
| 39 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 40 | #include "FLAC/assert.h" |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 41 | #include "FLAC/file_decoder.h" |
| 42 | |
| 43 | #ifdef max |
| 44 | #undef max |
| 45 | #endif |
| 46 | #define max(a,b) ((a)>(b)?(a):(b)) |
| 47 | #ifdef min |
| 48 | #undef min |
| 49 | #endif |
| 50 | #define min(a,b) ((a)<(b)?(a):(b)) |
| 51 | |
| 52 | |
| 53 | /**************************************************************************** |
| 54 | * |
| 55 | * Local function declarations |
| 56 | * |
| 57 | ***************************************************************************/ |
| 58 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 59 | static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes); |
| 60 | static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes); |
| 61 | static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes); |
| 62 | static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes); |
| 63 | static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes); |
| 64 | static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes); |
| 65 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 66 | static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator); |
| 67 | static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block); |
| 68 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetadata_StreamInfo *block); |
| 69 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetadata_Padding *block, unsigned block_length); |
| 70 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetadata_Application *block, unsigned block_length); |
| 71 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetadata_SeekTable *block, unsigned block_length); |
| 72 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetadata_VorbisComment_Entry *entry); |
| 73 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetadata_VorbisComment *block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 74 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 75 | static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block); |
| 76 | static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block); |
| 77 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block); |
| 78 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length); |
| 79 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length); |
| 80 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block); |
| 81 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block); |
| 82 | static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block); |
| 83 | static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last); |
| 84 | static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 85 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 86 | static FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain); |
| 87 | static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 88 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 89 | static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator); |
| 90 | static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 91 | |
| 92 | /* return 0 if OK, 1 if read error, 2 if not a FLAC file */ |
| 93 | static unsigned seek_to_first_metadata_block_(FILE *f); |
| 94 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 95 | static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append); |
| 96 | static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, long fixup_is_last_flag_offset, FLAC__bool backup); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 97 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 98 | static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status); |
| 99 | static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 100 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 101 | static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status); |
| 102 | static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 103 | static void cleanup_tempfile_(FILE **tempfile, char **tempfilename); |
| 104 | |
| 105 | static FLAC__bool get_file_stats_(const char *filename, struct stat *stats); |
| 106 | static void set_file_stats_(const char *filename, struct stat *stats); |
| 107 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 108 | static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 109 | |
| 110 | |
| 111 | /**************************************************************************** |
| 112 | * |
| 113 | * Level 0 implementation |
| 114 | * |
| 115 | ***************************************************************************/ |
| 116 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 117 | static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 118 | static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 119 | static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); |
| 120 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 121 | typedef struct { |
| 122 | FLAC__bool got_error; |
| 123 | FLAC__bool got_streaminfo; |
Josh Coalson | 999be3b | 2002-06-10 04:42:35 +0000 | [diff] [blame] | 124 | FLAC__StreamMetadata *streaminfo; |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 125 | } level0_client_data; |
| 126 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 127 | FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 128 | { |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 129 | level0_client_data cd; |
Josh Coalson | 9b86c96 | 2002-07-10 07:11:15 +0000 | [diff] [blame] | 130 | FLAC__FileDecoder *decoder; |
| 131 | |
| 132 | FLAC__ASSERT(0 != filename); |
| 133 | FLAC__ASSERT(0 != streaminfo); |
| 134 | |
| 135 | decoder = FLAC__file_decoder_new(); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 136 | |
| 137 | if(0 == decoder) |
| 138 | return false; |
| 139 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 140 | cd.got_error = false; |
| 141 | cd.got_streaminfo = false; |
| 142 | cd.streaminfo = streaminfo; |
| 143 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 144 | FLAC__file_decoder_set_md5_checking(decoder, false); |
| 145 | FLAC__file_decoder_set_filename(decoder, filename); |
Josh Coalson | b4e186a | 2002-08-12 21:35:43 +0000 | [diff] [blame] | 146 | FLAC__file_decoder_set_metadata_ignore_all(decoder); |
| 147 | FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 148 | FLAC__file_decoder_set_write_callback(decoder, write_callback_); |
| 149 | FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_); |
| 150 | FLAC__file_decoder_set_error_callback(decoder, error_callback_); |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 151 | FLAC__file_decoder_set_client_data(decoder, &cd); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 152 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 153 | if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK || cd.got_error) { |
| 154 | FLAC__file_decoder_finish(decoder); |
| 155 | FLAC__file_decoder_delete(decoder); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 156 | return false; |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 157 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 158 | |
Josh Coalson | 3cec051 | 2002-08-02 06:26:12 +0000 | [diff] [blame] | 159 | /* the first thing decoded must be the STREAMINFO block: */ |
Josh Coalson | b4e186a | 2002-08-12 21:35:43 +0000 | [diff] [blame] | 160 | if(!FLAC__file_decoder_process_until_end_of_metadata(decoder) || cd.got_error) { |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 161 | FLAC__file_decoder_finish(decoder); |
| 162 | FLAC__file_decoder_delete(decoder); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 163 | return false; |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 164 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 165 | |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 166 | FLAC__file_decoder_finish(decoder); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 167 | FLAC__file_decoder_delete(decoder); |
| 168 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 169 | return !cd.got_error && cd.got_streaminfo; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 170 | } |
| 171 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 172 | FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 173 | { |
| 174 | (void)decoder, (void)frame, (void)buffer, (void)client_data; |
| 175 | |
Josh Coalson | 2835f43 | 2002-06-04 05:54:44 +0000 | [diff] [blame] | 176 | return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 177 | } |
| 178 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 179 | void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 180 | { |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 181 | level0_client_data *cd = (level0_client_data *)client_data; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 182 | (void)decoder; |
| 183 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 184 | if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO && 0 != cd->streaminfo) { |
Josh Coalson | 999be3b | 2002-06-10 04:42:35 +0000 | [diff] [blame] | 185 | *(cd->streaminfo) = *metadata; |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 186 | cd->got_streaminfo = true; |
| 187 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) |
| 191 | { |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 192 | level0_client_data *cd = (level0_client_data *)client_data; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 193 | (void)decoder; |
| 194 | |
Josh Coalson | 2835f43 | 2002-06-04 05:54:44 +0000 | [diff] [blame] | 195 | if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC) |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 196 | cd->got_error = true; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | |
| 200 | /**************************************************************************** |
| 201 | * |
| 202 | * Level 1 implementation |
| 203 | * |
| 204 | ***************************************************************************/ |
| 205 | |
| 206 | #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4) |
| 207 | /* 1 for initial offset, +4 for our own personal use */ |
| 208 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 209 | struct FLAC__Metadata_SimpleIterator { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 210 | FILE *file; |
| 211 | char *filename, *tempfile_path_prefix; |
| 212 | struct stat stats; |
| 213 | FLAC__bool has_stats; |
| 214 | FLAC__bool is_writable; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 215 | FLAC__Metadata_SimpleIteratorStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 216 | /*@@@ 2G limits here because of the offset type: */ |
| 217 | long offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH]; |
| 218 | long first_offset; /* this is the offset to the STREAMINFO block */ |
| 219 | unsigned depth; |
| 220 | /* this is the metadata block header of the current block we are pointing to: */ |
| 221 | FLAC__bool is_last; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 222 | FLAC__MetadataType type; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 223 | unsigned length; |
| 224 | }; |
| 225 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 226 | FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 227 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK", |
| 228 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT", |
| 229 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE", |
| 230 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE", |
| 231 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE", |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 232 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA", |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 233 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR", |
| 234 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR", |
| 235 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR", |
| 236 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR", |
| 237 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR", |
| 238 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR", |
| 239 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR" |
| 240 | }; |
| 241 | |
| 242 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 243 | FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new() |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 244 | { |
Josh Coalson | ea7155f | 2002-10-18 05:49:19 +0000 | [diff] [blame^] | 245 | FLAC__Metadata_SimpleIterator *iterator = calloc(1, sizeof(FLAC__Metadata_SimpleIterator)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 246 | |
| 247 | if(0 != iterator) { |
| 248 | iterator->file = 0; |
| 249 | iterator->filename = 0; |
| 250 | iterator->tempfile_path_prefix = 0; |
| 251 | iterator->has_stats = false; |
| 252 | iterator->is_writable = false; |
| 253 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 254 | iterator->first_offset = iterator->offset[0] = -1; |
| 255 | iterator->depth = 0; |
| 256 | } |
| 257 | |
| 258 | return iterator; |
| 259 | } |
| 260 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 261 | static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 262 | { |
| 263 | FLAC__ASSERT(0 != iterator); |
| 264 | |
| 265 | if(0 != iterator->file) { |
| 266 | fclose(iterator->file); |
| 267 | iterator->file = 0; |
| 268 | if(iterator->has_stats) |
| 269 | set_file_stats_(iterator->filename, &iterator->stats); |
| 270 | } |
| 271 | if(0 != iterator->filename) { |
| 272 | free(iterator->filename); |
| 273 | iterator->filename = 0; |
| 274 | } |
| 275 | if(0 != iterator->tempfile_path_prefix) { |
| 276 | free(iterator->tempfile_path_prefix); |
| 277 | iterator->tempfile_path_prefix = 0; |
| 278 | } |
| 279 | } |
| 280 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 281 | FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 282 | { |
| 283 | FLAC__ASSERT(0 != iterator); |
| 284 | |
| 285 | simple_iterator_free_guts_(iterator); |
| 286 | free(iterator); |
| 287 | } |
| 288 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 289 | FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 290 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 291 | FLAC__Metadata_SimpleIteratorStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 292 | |
| 293 | FLAC__ASSERT(0 != iterator); |
| 294 | |
| 295 | status = iterator->status; |
| 296 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 297 | return status; |
| 298 | } |
| 299 | |
Josh Coalson | 3ac6693 | 2002-08-30 05:41:31 +0000 | [diff] [blame] | 300 | static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 301 | { |
| 302 | unsigned ret; |
| 303 | |
| 304 | FLAC__ASSERT(0 != iterator); |
| 305 | |
Josh Coalson | 3ac6693 | 2002-08-30 05:41:31 +0000 | [diff] [blame] | 306 | if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) { |
| 307 | iterator->is_writable = false; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 308 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 309 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | 3ac6693 | 2002-08-30 05:41:31 +0000 | [diff] [blame] | 310 | if(read_only || errno == EACCES) { |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 311 | #endif |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 312 | if(0 == (iterator->file = fopen(iterator->filename, "rb"))) { |
| 313 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 314 | return false; |
| 315 | } |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 316 | #if !defined _MSC_VER && !defined __MINGW32__ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 317 | } |
| 318 | else { |
| 319 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 320 | return false; |
| 321 | } |
Josh Coalson | 60b205c | 2002-07-03 07:40:07 +0000 | [diff] [blame] | 322 | #endif |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 323 | } |
| 324 | else { |
| 325 | iterator->is_writable = true; |
| 326 | } |
| 327 | |
| 328 | ret = seek_to_first_metadata_block_(iterator->file); |
| 329 | switch(ret) { |
| 330 | case 0: |
| 331 | iterator->depth = 0; |
| 332 | iterator->first_offset = iterator->offset[iterator->depth] = ftell(iterator->file); |
| 333 | return read_metadata_block_header_(iterator); |
| 334 | case 1: |
| 335 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 336 | return false; |
| 337 | case 2: |
| 338 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE; |
| 339 | return false; |
| 340 | default: |
| 341 | FLAC__ASSERT(0); |
| 342 | return false; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | #if 0 |
| 347 | @@@ If we decide to finish implementing this, put this comment back in metadata.h |
| 348 | /* |
| 349 | * The 'tempfile_path_prefix' allows you to specify a directory where |
| 350 | * tempfiles should go. Remember that if your metadata edits cause the |
| 351 | * FLAC file to grow, the entire file will have to be rewritten. If |
| 352 | * 'tempfile_path_prefix' is NULL, the temp file will be written in the |
| 353 | * same directory as the original FLAC file. This makes replacing the |
| 354 | * original with the tempfile fast but requires extra space in the same |
| 355 | * partition for the tempfile. If space is a problem, you can pass a |
| 356 | * directory name belonging to a different partition in |
| 357 | * 'tempfile_path_prefix'. Note that you should use the forward slash |
| 358 | * '/' as the directory separator. A trailing slash is not needed; it |
| 359 | * will be added automatically. |
| 360 | */ |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 361 | FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 362 | #endif |
| 363 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 364 | FLAC_API FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool read_only, FLAC__bool preserve_file_stats) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 365 | { |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 366 | const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 367 | |
| 368 | FLAC__ASSERT(0 != iterator); |
| 369 | FLAC__ASSERT(0 != filename); |
| 370 | |
| 371 | simple_iterator_free_guts_(iterator); |
| 372 | |
Josh Coalson | 3ac6693 | 2002-08-30 05:41:31 +0000 | [diff] [blame] | 373 | if(!read_only && preserve_file_stats) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 374 | iterator->has_stats = get_file_stats_(filename, &iterator->stats); |
| 375 | |
| 376 | if(0 == (iterator->filename = strdup(filename))) { |
| 377 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 378 | return false; |
| 379 | } |
| 380 | if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) { |
| 381 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 382 | return false; |
| 383 | } |
| 384 | |
Josh Coalson | 3ac6693 | 2002-08-30 05:41:31 +0000 | [diff] [blame] | 385 | return simple_iterator_prime_input_(iterator, read_only); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 386 | } |
| 387 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 388 | FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 389 | { |
| 390 | FLAC__ASSERT(0 != iterator); |
| 391 | FLAC__ASSERT(0 != iterator->file); |
| 392 | |
| 393 | return iterator->is_writable; |
| 394 | } |
| 395 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 396 | FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 397 | { |
| 398 | FLAC__ASSERT(0 != iterator); |
| 399 | FLAC__ASSERT(0 != iterator->file); |
| 400 | |
| 401 | if(iterator->is_last) |
| 402 | return false; |
| 403 | |
| 404 | if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) { |
| 405 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 406 | return false; |
| 407 | } |
| 408 | |
| 409 | iterator->offset[iterator->depth] = ftell(iterator->file); |
| 410 | |
| 411 | return read_metadata_block_header_(iterator); |
| 412 | } |
| 413 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 414 | FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 415 | { |
| 416 | long this_offset; |
| 417 | |
| 418 | FLAC__ASSERT(0 != iterator); |
| 419 | FLAC__ASSERT(0 != iterator->file); |
| 420 | |
| 421 | if(iterator->offset[iterator->depth] == iterator->first_offset) |
| 422 | return false; |
| 423 | |
| 424 | if(0 != fseek(iterator->file, iterator->first_offset, SEEK_SET)) { |
| 425 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 426 | return false; |
| 427 | } |
| 428 | this_offset = iterator->first_offset; |
| 429 | if(!read_metadata_block_header_(iterator)) |
| 430 | return false; |
| 431 | |
| 432 | /* we ignore any error from ftell() and catch it in fseek() */ |
| 433 | while(ftell(iterator->file) + (long)iterator->length < iterator->offset[iterator->depth]) { |
| 434 | if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) { |
| 435 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 436 | return false; |
| 437 | } |
| 438 | this_offset = ftell(iterator->file); |
| 439 | if(!read_metadata_block_header_(iterator)) |
| 440 | return false; |
| 441 | } |
| 442 | |
| 443 | iterator->offset[iterator->depth] = this_offset; |
| 444 | |
| 445 | return true; |
| 446 | } |
| 447 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 448 | FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 449 | { |
| 450 | FLAC__ASSERT(0 != iterator); |
| 451 | FLAC__ASSERT(0 != iterator->file); |
| 452 | |
| 453 | return iterator->type; |
| 454 | } |
| 455 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 456 | FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 457 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 458 | FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 459 | |
| 460 | FLAC__ASSERT(0 != iterator); |
| 461 | FLAC__ASSERT(0 != iterator->file); |
| 462 | |
| 463 | if(0 != block) { |
| 464 | block->is_last = iterator->is_last; |
| 465 | block->length = iterator->length; |
| 466 | |
| 467 | if(!read_metadata_block_data_(iterator, block)) { |
| 468 | FLAC__metadata_object_delete(block); |
| 469 | return 0; |
| 470 | } |
| 471 | |
| 472 | /* back up to the beginning of the block data to stay consistent */ |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 473 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 474 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 475 | FLAC__metadata_object_delete(block); |
| 476 | return 0; |
| 477 | } |
| 478 | } |
| 479 | else |
| 480 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 481 | |
| 482 | return block; |
| 483 | } |
| 484 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 485 | FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 486 | { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 487 | FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];) |
| 488 | FLAC__bool ret; |
| 489 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 490 | FLAC__ASSERT(0 != iterator); |
| 491 | FLAC__ASSERT(0 != iterator->file); |
Josh Coalson | d8ab346 | 2002-07-11 05:54:05 +0000 | [diff] [blame] | 492 | FLAC__ASSERT(0 != block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 493 | |
| 494 | if(!iterator->is_writable) { |
| 495 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE; |
| 496 | return false; |
| 497 | } |
| 498 | |
| 499 | if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 500 | if(iterator->type != block->type) { |
| 501 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 502 | return false; |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | block->is_last = iterator->is_last; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 507 | |
| 508 | if(iterator->length == block->length) |
| 509 | return write_metadata_block_stationary_(iterator, block); |
| 510 | else if(iterator->length > block->length) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 511 | if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) { |
| 512 | ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 513 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 514 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 515 | return ret; |
| 516 | } |
| 517 | else { |
| 518 | ret = rewrite_whole_file_(iterator, block, /*append=*/false); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 519 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 520 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 521 | return ret; |
| 522 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 523 | } |
| 524 | else /* iterator->length < block->length */ { |
| 525 | unsigned padding_leftover = 0; |
| 526 | FLAC__bool padding_is_last = false; |
| 527 | if(use_padding) { |
| 528 | /* first see if we can even use padding */ |
| 529 | if(iterator->is_last) { |
| 530 | use_padding = false; |
| 531 | } |
| 532 | else { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 533 | const unsigned extra_padding_bytes_required = block->length - iterator->length; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 534 | simple_iterator_push_(iterator); |
| 535 | if(!FLAC__metadata_simple_iterator_next(iterator)) { |
| 536 | (void)simple_iterator_pop_(iterator); |
| 537 | return false; |
| 538 | } |
| 539 | if(iterator->type != FLAC__METADATA_TYPE_PADDING) { |
| 540 | use_padding = false; |
| 541 | } |
| 542 | else { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 543 | if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 544 | padding_leftover = 0; |
| 545 | block->is_last = iterator->is_last; |
| 546 | } |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 547 | else if(iterator->length < extra_padding_bytes_required) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 548 | use_padding = false; |
| 549 | else { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 550 | padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 551 | padding_is_last = iterator->is_last; |
| 552 | block->is_last = false; |
| 553 | } |
| 554 | } |
| 555 | if(!simple_iterator_pop_(iterator)) |
| 556 | return false; |
| 557 | } |
| 558 | } |
| 559 | if(use_padding) { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 560 | if(padding_leftover == 0) { |
| 561 | ret = write_metadata_block_stationary_(iterator, block); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 562 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 563 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 564 | return ret; |
| 565 | } |
| 566 | else { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 567 | FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH); |
| 568 | ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 569 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 570 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 571 | return ret; |
| 572 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 573 | } |
| 574 | else { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 575 | ret = rewrite_whole_file_(iterator, block, /*append=*/false); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 576 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 577 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 578 | return ret; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 579 | } |
| 580 | } |
| 581 | } |
| 582 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 583 | FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 584 | { |
| 585 | unsigned padding_leftover = 0; |
| 586 | FLAC__bool padding_is_last = false; |
| 587 | |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 588 | FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;) |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 589 | FLAC__bool ret; |
| 590 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 591 | FLAC__ASSERT(0 != iterator); |
| 592 | FLAC__ASSERT(0 != iterator->file); |
Josh Coalson | d8ab346 | 2002-07-11 05:54:05 +0000 | [diff] [blame] | 593 | FLAC__ASSERT(0 != block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 594 | |
| 595 | if(!iterator->is_writable) |
| 596 | return false; |
| 597 | |
| 598 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 599 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 600 | return false; |
| 601 | } |
| 602 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 603 | block->is_last = iterator->is_last; |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 604 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 605 | if(use_padding) { |
| 606 | /* first see if we can even use padding */ |
| 607 | if(iterator->is_last) { |
| 608 | use_padding = false; |
| 609 | } |
| 610 | else { |
| 611 | simple_iterator_push_(iterator); |
| 612 | if(!FLAC__metadata_simple_iterator_next(iterator)) { |
| 613 | (void)simple_iterator_pop_(iterator); |
| 614 | return false; |
| 615 | } |
| 616 | if(iterator->type != FLAC__METADATA_TYPE_PADDING) { |
| 617 | use_padding = false; |
| 618 | } |
| 619 | else { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 620 | if(iterator->length == block->length) { |
| 621 | padding_leftover = 0; |
| 622 | block->is_last = iterator->is_last; |
| 623 | } |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 624 | else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 625 | use_padding = false; |
| 626 | else { |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 627 | padding_leftover = iterator->length - block->length; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 628 | padding_is_last = iterator->is_last; |
| 629 | block->is_last = false; |
| 630 | } |
| 631 | } |
| 632 | if(!simple_iterator_pop_(iterator)) |
| 633 | return false; |
| 634 | } |
| 635 | } |
| 636 | if(use_padding) { |
| 637 | /* move to the next block, which is suitable padding */ |
| 638 | if(!FLAC__metadata_simple_iterator_next(iterator)) |
| 639 | return false; |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 640 | if(padding_leftover == 0) { |
| 641 | ret = write_metadata_block_stationary_(iterator, block); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 642 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 643 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 644 | return ret; |
| 645 | } |
| 646 | else { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 647 | FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH); |
| 648 | ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 649 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 650 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 651 | return ret; |
| 652 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 653 | } |
| 654 | else { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 655 | ret = rewrite_whole_file_(iterator, block, /*append=*/true); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 656 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 657 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 658 | return ret; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 659 | } |
| 660 | } |
| 661 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 662 | FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 663 | { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 664 | FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];) |
| 665 | FLAC__bool ret; |
| 666 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 667 | if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 668 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 669 | return false; |
| 670 | } |
| 671 | |
| 672 | if(use_padding) { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 673 | FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 674 | if(0 == padding) { |
| 675 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 676 | return false; |
| 677 | } |
| 678 | padding->length = iterator->length; |
| 679 | if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) { |
| 680 | FLAC__metadata_object_delete(padding); |
| 681 | return false; |
| 682 | } |
| 683 | FLAC__metadata_object_delete(padding); |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 684 | if(!FLAC__metadata_simple_iterator_prev(iterator)) |
| 685 | return false; |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 686 | FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 687 | FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 688 | return true; |
| 689 | } |
| 690 | else { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 691 | ret = rewrite_whole_file_(iterator, 0, /*append=*/false); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 692 | FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 693 | FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset); |
| 694 | return ret; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 695 | } |
| 696 | } |
| 697 | |
| 698 | |
| 699 | |
| 700 | /**************************************************************************** |
| 701 | * |
| 702 | * Level 2 implementation |
| 703 | * |
| 704 | ***************************************************************************/ |
| 705 | |
| 706 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 707 | typedef struct FLAC__Metadata_Node { |
| 708 | FLAC__StreamMetadata *data; |
| 709 | struct FLAC__Metadata_Node *prev, *next; |
| 710 | } FLAC__Metadata_Node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 711 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 712 | struct FLAC__Metadata_Chain { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 713 | char *filename; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 714 | FLAC__Metadata_Node *head; |
| 715 | FLAC__Metadata_Node *tail; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 716 | unsigned nodes; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 717 | FLAC__Metadata_ChainStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 718 | long first_offset, last_offset; /*@@@ 2G limit */ |
| 719 | /* |
| 720 | * This is the length of the chain initially read from the FLAC file. |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 721 | * it is used to compare against the current length to decide whether |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 722 | * or not the whole file has to be rewritten. |
| 723 | */ |
| 724 | unsigned initial_length; /*@@@ 4G limit */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 725 | }; |
| 726 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 727 | struct FLAC__Metadata_Iterator { |
| 728 | FLAC__Metadata_Chain *chain; |
| 729 | FLAC__Metadata_Node *current; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 730 | }; |
| 731 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 732 | FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 733 | "FLAC__METADATA_CHAIN_STATUS_OK", |
| 734 | "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT", |
| 735 | "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE", |
| 736 | "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE", |
| 737 | "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE", |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 738 | "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA", |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 739 | "FLAC__METADATA_CHAIN_STATUS_READ_ERROR", |
| 740 | "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR", |
| 741 | "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR", |
| 742 | "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR", |
| 743 | "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR", |
| 744 | "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR", |
| 745 | "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR" |
| 746 | }; |
| 747 | |
| 748 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 749 | static FLAC__Metadata_Node *node_new_() |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 750 | { |
Josh Coalson | ea7155f | 2002-10-18 05:49:19 +0000 | [diff] [blame^] | 751 | return (FLAC__Metadata_Node*)calloc(1, sizeof(FLAC__Metadata_Node)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 752 | } |
| 753 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 754 | static void node_delete_(FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 755 | { |
| 756 | FLAC__ASSERT(0 != node); |
| 757 | if(0 != node->data) |
| 758 | FLAC__metadata_object_delete(node->data); |
| 759 | free(node); |
| 760 | } |
| 761 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 762 | static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 763 | { |
| 764 | FLAC__ASSERT(0 != chain); |
| 765 | FLAC__ASSERT(0 != node); |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 766 | FLAC__ASSERT(0 != node->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 767 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 768 | node->next = node->prev = 0; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 769 | node->data->is_last = true; |
| 770 | if(0 != chain->tail) |
| 771 | chain->tail->data->is_last = false; |
| 772 | |
| 773 | if(0 == chain->head) |
| 774 | chain->head = node; |
| 775 | else { |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 776 | FLAC__ASSERT(0 != chain->tail); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 777 | chain->tail->next = node; |
| 778 | node->prev = chain->tail; |
| 779 | } |
| 780 | chain->tail = node; |
| 781 | chain->nodes++; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 782 | } |
| 783 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 784 | static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 785 | { |
| 786 | FLAC__ASSERT(0 != chain); |
| 787 | FLAC__ASSERT(0 != node); |
| 788 | |
| 789 | if(node == chain->head) |
| 790 | chain->head = node->next; |
| 791 | else |
| 792 | node->prev->next = node->next; |
| 793 | |
| 794 | if(node == chain->tail) |
| 795 | chain->tail = node->prev; |
| 796 | else |
| 797 | node->next->prev = node->prev; |
| 798 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 799 | if(0 != chain->tail) |
| 800 | chain->tail->data->is_last = true; |
| 801 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 802 | chain->nodes--; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 803 | } |
| 804 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 805 | static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 806 | { |
| 807 | chain_remove_node_(chain, node); |
| 808 | node_delete_(node); |
| 809 | } |
| 810 | |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 811 | static unsigned chain_calculate_length_(FLAC__Metadata_Chain *chain) |
| 812 | { |
| 813 | const FLAC__Metadata_Node *node; |
| 814 | unsigned length = 0; |
| 815 | for(node = chain->head; node; node = node->next) |
| 816 | length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length); |
| 817 | return length; |
| 818 | } |
| 819 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 820 | static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 821 | { |
| 822 | FLAC__ASSERT(0 != node); |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 823 | FLAC__ASSERT(0 != node->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 824 | FLAC__ASSERT(0 != iterator); |
| 825 | FLAC__ASSERT(0 != iterator->current); |
| 826 | FLAC__ASSERT(0 != iterator->chain); |
| 827 | FLAC__ASSERT(0 != iterator->chain->head); |
| 828 | FLAC__ASSERT(0 != iterator->chain->tail); |
| 829 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 830 | node->data->is_last = false; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 831 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 832 | node->prev = iterator->current->prev; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 833 | node->next = iterator->current; |
| 834 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 835 | if(0 == node->prev) |
| 836 | iterator->chain->head = node; |
| 837 | else |
| 838 | node->prev->next = node; |
| 839 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 840 | iterator->current->prev = node; |
| 841 | |
| 842 | iterator->chain->nodes++; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 843 | } |
| 844 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 845 | static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 846 | { |
| 847 | FLAC__ASSERT(0 != node); |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 848 | FLAC__ASSERT(0 != node->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 849 | FLAC__ASSERT(0 != iterator); |
| 850 | FLAC__ASSERT(0 != iterator->current); |
| 851 | FLAC__ASSERT(0 != iterator->chain); |
| 852 | FLAC__ASSERT(0 != iterator->chain->head); |
| 853 | FLAC__ASSERT(0 != iterator->chain->tail); |
| 854 | |
| 855 | iterator->current->data->is_last = false; |
| 856 | |
| 857 | node->prev = iterator->current; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 858 | node->next = iterator->current->next; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 859 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 860 | if(0 == node->next) |
| 861 | iterator->chain->tail = node; |
| 862 | else |
| 863 | node->next->prev = node; |
| 864 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 865 | node->prev->next = node; |
| 866 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 867 | iterator->chain->tail->data->is_last = true; |
| 868 | |
| 869 | iterator->chain->nodes++; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 870 | } |
| 871 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 872 | /* return true iff node and node->next are both padding */ |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 873 | static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node) |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 874 | { |
| 875 | if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 876 | const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 877 | node->data->length += growth; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 878 | |
| 879 | chain_delete_node_(chain, node->next); |
| 880 | return true; |
| 881 | } |
| 882 | else |
| 883 | return false; |
| 884 | } |
| 885 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 886 | FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new() |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 887 | { |
Josh Coalson | ea7155f | 2002-10-18 05:49:19 +0000 | [diff] [blame^] | 888 | FLAC__Metadata_Chain *chain = calloc(1, sizeof(FLAC__Metadata_Chain)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 889 | |
| 890 | if(0 != chain) { |
| 891 | chain->filename = 0; |
| 892 | chain->head = chain->tail = 0; |
| 893 | chain->nodes = 0; |
| 894 | chain->status = FLAC__METADATA_CHAIN_STATUS_OK; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 895 | chain->initial_length = 0; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 896 | } |
| 897 | |
| 898 | return chain; |
| 899 | } |
| 900 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 901 | FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 902 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 903 | FLAC__Metadata_Node *node, *next; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 904 | |
| 905 | FLAC__ASSERT(0 != chain); |
| 906 | |
| 907 | for(node = chain->head; node; ) { |
| 908 | next = node->next; |
| 909 | node_delete_(node); |
| 910 | node = next; |
| 911 | } |
| 912 | |
| 913 | if(0 != chain->filename) |
| 914 | free(chain->filename); |
| 915 | |
| 916 | free(chain); |
| 917 | } |
| 918 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 919 | FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 920 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 921 | FLAC__Metadata_ChainStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 922 | |
| 923 | FLAC__ASSERT(0 != chain); |
| 924 | |
| 925 | status = chain->status; |
| 926 | chain->status = FLAC__METADATA_CHAIN_STATUS_OK; |
| 927 | return status; |
| 928 | } |
| 929 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 930 | FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 931 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 932 | FLAC__Metadata_SimpleIterator *iterator; |
| 933 | FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 934 | |
| 935 | FLAC__ASSERT(0 != chain); |
| 936 | FLAC__ASSERT(0 != filename); |
| 937 | |
| 938 | if(0 == (chain->filename = strdup(filename))) { |
| 939 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 940 | return false; |
| 941 | } |
| 942 | |
| 943 | if(0 == (iterator = FLAC__metadata_simple_iterator_new())) { |
| 944 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 945 | return false; |
| 946 | } |
| 947 | |
Josh Coalson | 3ac6693 | 2002-08-30 05:41:31 +0000 | [diff] [blame] | 948 | if(!FLAC__metadata_simple_iterator_init(iterator, filename, /*read_only=*/true, /*preserve_file_stats=*/false)) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 949 | chain->status = get_equivalent_status_(iterator->status); |
| 950 | return false; |
| 951 | } |
| 952 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 953 | chain->first_offset = iterator->offset[iterator->depth]; |
| 954 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 955 | do { |
| 956 | node = node_new_(); |
| 957 | if(0 == node) { |
| 958 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 959 | return false; |
| 960 | } |
| 961 | node->data = FLAC__metadata_simple_iterator_get_block(iterator); |
| 962 | if(0 == node->data) { |
| 963 | node_delete_(node); |
| 964 | chain->status = get_equivalent_status_(iterator->status); |
| 965 | return false; |
| 966 | } |
| 967 | chain_append_node_(chain, node); |
| 968 | } while(FLAC__metadata_simple_iterator_next(iterator)); |
| 969 | |
| 970 | if(!iterator->is_last || iterator->status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK) { |
| 971 | chain->status = get_equivalent_status_(iterator->status); |
| 972 | return false; |
| 973 | } |
| 974 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 975 | chain->last_offset = ftell(iterator->file) + iterator->length; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 976 | FLAC__metadata_simple_iterator_delete(iterator); |
| 977 | |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 978 | chain->initial_length = chain_calculate_length_(chain); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 979 | return true; |
| 980 | } |
| 981 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 982 | FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 983 | { |
| 984 | struct stat stats; |
| 985 | const char *tempfile_path_prefix = 0; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 986 | unsigned current_length; |
| 987 | |
| 988 | FLAC__ASSERT(0 != chain); |
| 989 | |
| 990 | current_length = chain_calculate_length_(chain); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 991 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 992 | if(use_padding) { |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 993 | if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) { |
| 994 | const unsigned delta = chain->initial_length - current_length; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 995 | chain->tail->data->length += delta; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 996 | current_length += delta; |
| 997 | FLAC__ASSERT(current_length == chain->initial_length); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 998 | } |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 999 | else if(current_length + FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1000 | FLAC__StreamMetadata *padding; |
| 1001 | FLAC__Metadata_Node *node; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1002 | if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) { |
| 1003 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1004 | return false; |
| 1005 | } |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1006 | padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1007 | if(0 == (node = node_new_())) { |
| 1008 | FLAC__metadata_object_delete(padding); |
| 1009 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1010 | return false; |
| 1011 | } |
| 1012 | node->data = padding; |
| 1013 | chain_append_node_(chain, node); |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1014 | current_length = chain_calculate_length_(chain); |
| 1015 | FLAC__ASSERT(current_length == chain->initial_length); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1016 | } |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1017 | else if(current_length > chain->initial_length) { |
| 1018 | const unsigned delta = current_length - chain->initial_length; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1019 | if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1020 | if(chain->tail->data->length + FLAC__STREAM_METADATA_HEADER_LENGTH == delta) { |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1021 | chain_delete_node_(chain, chain->tail); |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1022 | current_length = chain_calculate_length_(chain); |
| 1023 | FLAC__ASSERT(current_length == chain->initial_length); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1024 | } |
Josh Coalson | e2ba10f | 2002-05-14 06:03:17 +0000 | [diff] [blame] | 1025 | else if(chain->tail->data->length >= delta) { |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1026 | chain->tail->data->length -= delta; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1027 | current_length -= delta; |
| 1028 | FLAC__ASSERT(current_length == chain->initial_length); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1029 | } |
| 1030 | } |
| 1031 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | if(preserve_file_stats) |
| 1035 | get_file_stats_(chain->filename, &stats); |
| 1036 | |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1037 | if(current_length == chain->initial_length) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1038 | if(!chain_rewrite_chain_(chain)) |
| 1039 | return false; |
| 1040 | } |
| 1041 | else { |
| 1042 | if(!chain_rewrite_file_(chain, tempfile_path_prefix)) |
| 1043 | return false; |
| 1044 | } |
| 1045 | |
| 1046 | if(preserve_file_stats) |
| 1047 | set_file_stats_(chain->filename, &stats); |
| 1048 | |
Josh Coalson | e2ba10f | 2002-05-14 06:03:17 +0000 | [diff] [blame] | 1049 | /* recompute lengths and offsets if necessary */ |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1050 | if(chain->initial_length != current_length) { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1051 | const FLAC__Metadata_Node *node; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1052 | chain->initial_length = current_length; |
Josh Coalson | e2ba10f | 2002-05-14 06:03:17 +0000 | [diff] [blame] | 1053 | chain->last_offset = chain->first_offset; |
| 1054 | for(node = chain->head; node; node = node->next) |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1055 | chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length); |
Josh Coalson | e2ba10f | 2002-05-14 06:03:17 +0000 | [diff] [blame] | 1056 | } |
| 1057 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1058 | return true; |
| 1059 | } |
| 1060 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1061 | FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1062 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1063 | FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1064 | |
| 1065 | FLAC__ASSERT(0 != chain); |
| 1066 | |
| 1067 | for(node = chain->head; node; ) { |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1068 | if(!chain_merge_adjacent_padding_(chain, node)) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1069 | node = node->next; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1070 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1071 | } |
| 1072 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1073 | FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1074 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1075 | FLAC__Metadata_Node *node, *save; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1076 | unsigned i; |
| 1077 | |
| 1078 | FLAC__ASSERT(0 != chain); |
| 1079 | |
| 1080 | /* |
| 1081 | * Don't try and be too smart... this simple algo is good enough for |
| 1082 | * the small number of nodes that we deal with. |
| 1083 | */ |
| 1084 | for(i = 0, node = chain->head; i < chain->nodes; i++) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1085 | if(node->data->type == FLAC__METADATA_TYPE_PADDING) { |
| 1086 | save = node->next; |
| 1087 | chain_remove_node_(chain, node); |
| 1088 | chain_append_node_(chain, node); |
| 1089 | node = save; |
| 1090 | } |
| 1091 | else { |
| 1092 | node = node->next; |
| 1093 | } |
| 1094 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1095 | |
| 1096 | FLAC__metadata_chain_merge_padding(chain); |
| 1097 | } |
| 1098 | |
| 1099 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1100 | FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new() |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1101 | { |
Josh Coalson | ea7155f | 2002-10-18 05:49:19 +0000 | [diff] [blame^] | 1102 | FLAC__Metadata_Iterator *iterator = calloc(1, sizeof(FLAC__Metadata_Iterator)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1103 | |
Josh Coalson | ea7155f | 2002-10-18 05:49:19 +0000 | [diff] [blame^] | 1104 | /* calloc() implies: |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1105 | iterator->current = 0; |
| 1106 | iterator->chain = 0; |
Josh Coalson | ea7155f | 2002-10-18 05:49:19 +0000 | [diff] [blame^] | 1107 | */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1108 | |
| 1109 | return iterator; |
| 1110 | } |
| 1111 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1112 | FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1113 | { |
| 1114 | FLAC__ASSERT(0 != iterator); |
| 1115 | |
| 1116 | free(iterator); |
| 1117 | } |
| 1118 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1119 | FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1120 | { |
| 1121 | FLAC__ASSERT(0 != iterator); |
| 1122 | FLAC__ASSERT(0 != chain); |
| 1123 | FLAC__ASSERT(0 != chain->head); |
| 1124 | |
| 1125 | iterator->chain = chain; |
| 1126 | iterator->current = chain->head; |
| 1127 | } |
| 1128 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1129 | FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1130 | { |
| 1131 | FLAC__ASSERT(0 != iterator); |
| 1132 | |
| 1133 | if(0 == iterator->current || 0 == iterator->current->next) |
| 1134 | return false; |
| 1135 | |
| 1136 | iterator->current = iterator->current->next; |
| 1137 | return true; |
| 1138 | } |
| 1139 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1140 | FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1141 | { |
| 1142 | FLAC__ASSERT(0 != iterator); |
| 1143 | |
| 1144 | if(0 == iterator->current || 0 == iterator->current->prev) |
| 1145 | return false; |
| 1146 | |
| 1147 | iterator->current = iterator->current->prev; |
| 1148 | return true; |
| 1149 | } |
| 1150 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1151 | FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1152 | { |
| 1153 | FLAC__ASSERT(0 != iterator); |
| 1154 | FLAC__ASSERT(0 != iterator->current); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1155 | FLAC__ASSERT(0 != iterator->current->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1156 | |
| 1157 | return iterator->current->data->type; |
| 1158 | } |
| 1159 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1160 | FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1161 | { |
| 1162 | FLAC__ASSERT(0 != iterator); |
| 1163 | FLAC__ASSERT(0 != iterator->current); |
| 1164 | |
| 1165 | return iterator->current->data; |
| 1166 | } |
| 1167 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1168 | FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block) |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1169 | { |
Josh Coalson | 9b86c96 | 2002-07-10 07:11:15 +0000 | [diff] [blame] | 1170 | FLAC__ASSERT(0 != iterator); |
| 1171 | FLAC__ASSERT(0 != block); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1172 | return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block); |
| 1173 | } |
| 1174 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1175 | FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1176 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1177 | FLAC__Metadata_Node *save; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1178 | |
| 1179 | FLAC__ASSERT(0 != iterator); |
| 1180 | FLAC__ASSERT(0 != iterator->current); |
| 1181 | |
| 1182 | if(0 == iterator->current->prev) { |
| 1183 | FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO); |
| 1184 | return false; |
| 1185 | } |
| 1186 | |
| 1187 | save = iterator->current->prev; |
| 1188 | |
| 1189 | if(replace_with_padding) { |
Josh Coalson | 90ced91 | 2002-05-30 05:23:38 +0000 | [diff] [blame] | 1190 | FLAC__metadata_object_delete_data(iterator->current->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1191 | iterator->current->data->type = FLAC__METADATA_TYPE_PADDING; |
| 1192 | } |
| 1193 | else { |
| 1194 | chain_delete_node_(iterator->chain, iterator->current); |
| 1195 | } |
| 1196 | |
| 1197 | iterator->current = save; |
| 1198 | return true; |
| 1199 | } |
| 1200 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1201 | FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1202 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1203 | FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1204 | |
| 1205 | FLAC__ASSERT(0 != iterator); |
| 1206 | FLAC__ASSERT(0 != iterator->current); |
Josh Coalson | 9b86c96 | 2002-07-10 07:11:15 +0000 | [diff] [blame] | 1207 | FLAC__ASSERT(0 != block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1208 | |
| 1209 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) |
| 1210 | return false; |
| 1211 | |
| 1212 | if(0 == iterator->current->prev) { |
| 1213 | FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO); |
| 1214 | return false; |
| 1215 | } |
| 1216 | |
| 1217 | if(0 == (node = node_new_())) |
| 1218 | return false; |
| 1219 | |
| 1220 | node->data = block; |
| 1221 | iterator_insert_node_(iterator, node); |
| 1222 | iterator->current = node; |
| 1223 | return true; |
| 1224 | } |
| 1225 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 1226 | FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1227 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1228 | FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1229 | |
| 1230 | FLAC__ASSERT(0 != iterator); |
| 1231 | FLAC__ASSERT(0 != iterator->current); |
Josh Coalson | 9b86c96 | 2002-07-10 07:11:15 +0000 | [diff] [blame] | 1232 | FLAC__ASSERT(0 != block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1233 | |
| 1234 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) |
| 1235 | return false; |
| 1236 | |
| 1237 | if(0 == (node = node_new_())) |
| 1238 | return false; |
| 1239 | |
| 1240 | node->data = block; |
| 1241 | iterator_insert_node_after_(iterator, node); |
| 1242 | iterator->current = node; |
| 1243 | return true; |
| 1244 | } |
| 1245 | |
| 1246 | |
| 1247 | /**************************************************************************** |
| 1248 | * |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1249 | * Local function definitions |
| 1250 | * |
| 1251 | ***************************************************************************/ |
| 1252 | |
| 1253 | void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes) |
| 1254 | { |
| 1255 | unsigned i; |
| 1256 | |
| 1257 | b += bytes; |
| 1258 | |
| 1259 | for(i = 0; i < bytes; i++) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1260 | *(--b) = (FLAC__byte)(val & 0xff); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1261 | val >>= 8; |
| 1262 | } |
| 1263 | } |
| 1264 | |
| 1265 | void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes) |
| 1266 | { |
| 1267 | unsigned i; |
| 1268 | |
| 1269 | for(i = 0; i < bytes; i++) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1270 | *(b++) = (FLAC__byte)(val & 0xff); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1271 | val >>= 8; |
| 1272 | } |
| 1273 | } |
| 1274 | |
| 1275 | void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes) |
| 1276 | { |
| 1277 | unsigned i; |
| 1278 | |
| 1279 | b += bytes; |
| 1280 | |
| 1281 | for(i = 0; i < bytes; i++) { |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1282 | *(--b) = (FLAC__byte)(val & 0xff); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1283 | val >>= 8; |
| 1284 | } |
| 1285 | } |
| 1286 | |
| 1287 | FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes) |
| 1288 | { |
| 1289 | FLAC__uint32 ret = 0; |
| 1290 | unsigned i; |
| 1291 | |
| 1292 | for(i = 0; i < bytes; i++) |
| 1293 | ret = (ret << 8) | (FLAC__uint32)(*b++); |
| 1294 | |
| 1295 | return ret; |
| 1296 | } |
| 1297 | |
| 1298 | FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes) |
| 1299 | { |
| 1300 | FLAC__uint32 ret = 0; |
| 1301 | unsigned i; |
| 1302 | |
| 1303 | b += bytes; |
| 1304 | |
| 1305 | for(i = 0; i < bytes; i++) |
| 1306 | ret = (ret << 8) | (FLAC__uint32)(*--b); |
| 1307 | |
| 1308 | return ret; |
| 1309 | } |
| 1310 | |
| 1311 | FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes) |
| 1312 | { |
| 1313 | FLAC__uint64 ret = 0; |
| 1314 | unsigned i; |
| 1315 | |
| 1316 | for(i = 0; i < bytes; i++) |
| 1317 | ret = (ret << 8) | (FLAC__uint64)(*b++); |
| 1318 | |
| 1319 | return ret; |
| 1320 | } |
| 1321 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1322 | FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1323 | { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1324 | FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH]; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1325 | |
| 1326 | FLAC__ASSERT(0 != iterator); |
| 1327 | FLAC__ASSERT(0 != iterator->file); |
| 1328 | |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1329 | if(fread(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, iterator->file) != FLAC__STREAM_METADATA_HEADER_LENGTH) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1330 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1331 | return false; |
| 1332 | } |
| 1333 | |
| 1334 | iterator->is_last = raw_header[0] & 0x80? true : false; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1335 | iterator->type = (FLAC__MetadataType)(raw_header[0] & 0x7f); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1336 | iterator->length = unpack_uint32_(raw_header + 1, 3); |
| 1337 | |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1338 | /* do some checking */ |
| 1339 | if(iterator->type > FLAC__METADATA_TYPE_VORBIS_COMMENT) { |
| 1340 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA; |
| 1341 | return false; |
| 1342 | } |
| 1343 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1344 | return true; |
| 1345 | } |
| 1346 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1347 | FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1348 | { |
| 1349 | FLAC__ASSERT(0 != iterator); |
| 1350 | FLAC__ASSERT(0 != iterator->file); |
| 1351 | |
| 1352 | switch(block->type) { |
| 1353 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1354 | iterator->status = read_metadata_block_data_streaminfo_(iterator->file, &block->data.stream_info); |
| 1355 | break; |
| 1356 | case FLAC__METADATA_TYPE_PADDING: |
| 1357 | iterator->status = read_metadata_block_data_padding_(iterator->file, &block->data.padding, block->length); |
| 1358 | break; |
| 1359 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1360 | iterator->status = read_metadata_block_data_application_(iterator->file, &block->data.application, block->length); |
| 1361 | break; |
| 1362 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1363 | iterator->status = read_metadata_block_data_seektable_(iterator->file, &block->data.seek_table, block->length); |
| 1364 | break; |
| 1365 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1366 | iterator->status = read_metadata_block_data_vorbis_comment_(iterator->file, &block->data.vorbis_comment); |
| 1367 | break; |
| 1368 | default: |
| 1369 | FLAC__ASSERT(0); |
| 1370 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR; |
| 1371 | } |
| 1372 | |
| 1373 | return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK); |
| 1374 | } |
| 1375 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1376 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetadata_StreamInfo *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1377 | { |
| 1378 | FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b; |
| 1379 | |
| 1380 | FLAC__ASSERT(0 != file); |
| 1381 | |
| 1382 | if(fread(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH) |
| 1383 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1384 | |
| 1385 | b = buffer; |
| 1386 | |
| 1387 | /* @@@ we are using hardcoded numbers for simplicity but we should |
| 1388 | * probably eventually write a bit-level unpacker and use the |
| 1389 | * _STREAMINFO_ constants. |
| 1390 | */ |
| 1391 | block->min_blocksize = unpack_uint32_(b, 2); b += 2; |
| 1392 | block->max_blocksize = unpack_uint32_(b, 2); b += 2; |
| 1393 | block->min_framesize = unpack_uint32_(b, 3); b += 3; |
| 1394 | block->max_framesize = unpack_uint32_(b, 3); b += 3; |
| 1395 | block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4); |
| 1396 | block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1; |
Josh Coalson | b4e186a | 2002-08-12 21:35:43 +0000 | [diff] [blame] | 1397 | block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1398 | block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4); |
| 1399 | memcpy(block->md5sum, b+8, 16); |
| 1400 | |
| 1401 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1402 | } |
| 1403 | |
| 1404 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1405 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetadata_Padding *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1406 | { |
| 1407 | FLAC__ASSERT(0 != file); |
| 1408 | |
| 1409 | (void)block; /* nothing to do; we don't care about reading the padding bytes */ |
| 1410 | |
| 1411 | if(0 != fseek(file, block_length, SEEK_CUR)) |
| 1412 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1413 | |
| 1414 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1415 | } |
| 1416 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1417 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetadata_Application *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1418 | { |
| 1419 | const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; |
| 1420 | |
| 1421 | FLAC__ASSERT(0 != file); |
| 1422 | |
| 1423 | if(fread(block->id, 1, id_bytes, file) != id_bytes) |
| 1424 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1425 | |
| 1426 | block_length -= id_bytes; |
| 1427 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1428 | if(block_length == 0) { |
| 1429 | block->data = 0; |
| 1430 | } |
| 1431 | else { |
| 1432 | if(0 == (block->data = malloc(block_length))) |
| 1433 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1434 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1435 | if(fread(block->data, 1, block_length, file) != block_length) |
| 1436 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1437 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1438 | |
| 1439 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1440 | } |
| 1441 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1442 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetadata_SeekTable *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1443 | { |
| 1444 | unsigned i; |
| 1445 | FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH]; |
| 1446 | |
| 1447 | FLAC__ASSERT(0 != file); |
| 1448 | FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0); |
| 1449 | |
| 1450 | block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH; |
| 1451 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1452 | if(block->num_points == 0) |
| 1453 | block->points = 0; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1454 | else if(0 == (block->points = malloc(block->num_points * sizeof(FLAC__StreamMetadata_SeekPoint)))) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1455 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1456 | |
| 1457 | for(i = 0; i < block->num_points; i++) { |
| 1458 | if(fread(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH) |
| 1459 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1460 | /*@@@ some MAGIC NUMBERs here */ |
| 1461 | block->points[i].sample_number = unpack_uint64_(buffer, 8); |
| 1462 | block->points[i].stream_offset = unpack_uint64_(buffer+8, 8); |
| 1463 | block->points[i].frame_samples = unpack_uint32_(buffer+16, 2); |
| 1464 | } |
| 1465 | |
| 1466 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1467 | } |
| 1468 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1469 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetadata_VorbisComment_Entry *entry) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1470 | { |
| 1471 | const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8; |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1472 | FLAC__byte buffer[4]; /* magic number is asserted below */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1473 | |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1474 | FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == 4); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1475 | FLAC__ASSERT(0 != file); |
| 1476 | |
| 1477 | if(fread(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1478 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1479 | entry->length = unpack_uint32_little_endian_(buffer, entry_length_len); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1480 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1481 | if(entry->length == 0) { |
| 1482 | entry->entry = 0; |
| 1483 | } |
| 1484 | else { |
| 1485 | if(0 == (entry->entry = malloc(entry->length))) |
| 1486 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1487 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1488 | if(fread(entry->entry, 1, entry->length, file) != entry->length) |
| 1489 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1490 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1491 | |
| 1492 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1493 | } |
| 1494 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1495 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetadata_VorbisComment *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1496 | { |
| 1497 | unsigned i; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1498 | FLAC__Metadata_SimpleIteratorStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1499 | const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8; |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1500 | FLAC__byte buffer[4]; /* magic number is asserted below */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1501 | |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1502 | FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == 4); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1503 | FLAC__ASSERT(0 != file); |
| 1504 | |
| 1505 | if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, &(block->vendor_string)))) |
| 1506 | return status; |
| 1507 | |
| 1508 | if(fread(buffer, 1, num_comments_len, file) != num_comments_len) |
| 1509 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1510 | block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len); |
| 1511 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1512 | if(block->num_comments == 0) { |
| 1513 | block->comments = 0; |
| 1514 | } |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1515 | else if(0 == (block->comments = malloc(block->num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1516 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1517 | |
| 1518 | for(i = 0; i < block->num_comments; i++) { |
| 1519 | if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, block->comments + i))) |
| 1520 | return status; |
| 1521 | } |
| 1522 | |
| 1523 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1524 | } |
| 1525 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1526 | FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1527 | { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1528 | FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH]; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1529 | |
| 1530 | FLAC__ASSERT(0 != file); |
| 1531 | FLAC__ASSERT(0 != status); |
| 1532 | FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN)); |
| 1533 | |
| 1534 | buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type; |
| 1535 | pack_uint32_(block->length, buffer + 1, 3); |
| 1536 | |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1537 | if(fwrite(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, file) != FLAC__STREAM_METADATA_HEADER_LENGTH) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1538 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1539 | return false; |
| 1540 | } |
| 1541 | |
| 1542 | return true; |
| 1543 | } |
| 1544 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1545 | FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1546 | { |
| 1547 | FLAC__ASSERT(0 != file); |
| 1548 | FLAC__ASSERT(0 != status); |
| 1549 | |
| 1550 | switch(block->type) { |
| 1551 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1552 | *status = write_metadata_block_data_streaminfo_(file, &block->data.stream_info); |
| 1553 | break; |
| 1554 | case FLAC__METADATA_TYPE_PADDING: |
| 1555 | *status = write_metadata_block_data_padding_(file, &block->data.padding, block->length); |
| 1556 | break; |
| 1557 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1558 | *status = write_metadata_block_data_application_(file, &block->data.application, block->length); |
| 1559 | break; |
| 1560 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1561 | *status = write_metadata_block_data_seektable_(file, &block->data.seek_table); |
| 1562 | break; |
| 1563 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1564 | *status = write_metadata_block_data_vorbis_comment_(file, &block->data.vorbis_comment); |
| 1565 | break; |
| 1566 | default: |
| 1567 | FLAC__ASSERT(0); |
| 1568 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR; |
| 1569 | } |
| 1570 | return (*status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK); |
| 1571 | } |
| 1572 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1573 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1574 | { |
| 1575 | FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH]; |
| 1576 | const unsigned channels1 = block->channels - 1; |
| 1577 | const unsigned bps1 = block->bits_per_sample - 1; |
| 1578 | |
| 1579 | FLAC__ASSERT(0 != file); |
| 1580 | |
| 1581 | /* @@@ we are using hardcoded numbers for simplicity but we should |
| 1582 | * probably eventually write a bit-level packer and use the |
| 1583 | * _STREAMINFO_ constants. |
| 1584 | */ |
| 1585 | pack_uint32_(block->min_blocksize, buffer, 2); |
| 1586 | pack_uint32_(block->max_blocksize, buffer+2, 2); |
| 1587 | pack_uint32_(block->min_framesize, buffer+4, 3); |
| 1588 | pack_uint32_(block->max_framesize, buffer+7, 3); |
| 1589 | buffer[10] = (block->sample_rate >> 12) & 0xff; |
| 1590 | buffer[11] = (block->sample_rate >> 4) & 0xff; |
| 1591 | buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4); |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1592 | buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1593 | pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4); |
| 1594 | memcpy(buffer+18, block->md5sum, 16); |
| 1595 | |
| 1596 | if(fwrite(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH) |
| 1597 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1598 | |
| 1599 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1600 | } |
| 1601 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1602 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1603 | { |
| 1604 | unsigned i, n = block_length; |
| 1605 | FLAC__byte buffer[1024]; |
| 1606 | |
| 1607 | FLAC__ASSERT(0 != file); |
| 1608 | |
| 1609 | (void)block; |
| 1610 | |
| 1611 | memset(buffer, 0, 1024); |
| 1612 | |
| 1613 | for(i = 0; i < n/1024; i++) |
| 1614 | if(fwrite(buffer, 1, 1024, file) != 1024) |
| 1615 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1616 | |
| 1617 | n %= 1024; |
Josh Coalson | 765ff50 | 2002-08-27 05:46:11 +0000 | [diff] [blame] | 1618 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1619 | if(fwrite(buffer, 1, n, file) != n) |
| 1620 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1621 | |
| 1622 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1623 | } |
| 1624 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1625 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1626 | { |
| 1627 | const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; |
| 1628 | |
| 1629 | FLAC__ASSERT(0 != file); |
| 1630 | |
| 1631 | if(fwrite(block->id, 1, id_bytes, file) != id_bytes) |
| 1632 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1633 | |
| 1634 | block_length -= id_bytes; |
| 1635 | |
| 1636 | if(fwrite(block->data, 1, block_length, file) != block_length) |
| 1637 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1638 | |
| 1639 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1640 | } |
| 1641 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1642 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1643 | { |
| 1644 | unsigned i; |
| 1645 | FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH]; |
| 1646 | |
| 1647 | FLAC__ASSERT(0 != file); |
| 1648 | |
| 1649 | for(i = 0; i < block->num_points; i++) { |
| 1650 | /*@@@ some MAGIC NUMBERs here */ |
| 1651 | pack_uint64_(block->points[i].sample_number, buffer, 8); |
| 1652 | pack_uint64_(block->points[i].stream_offset, buffer+8, 8); |
| 1653 | pack_uint32_(block->points[i].frame_samples, buffer+16, 2); |
| 1654 | if(fwrite(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH) |
| 1655 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1656 | } |
| 1657 | |
| 1658 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1659 | } |
| 1660 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1661 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1662 | { |
| 1663 | unsigned i; |
| 1664 | const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8; |
| 1665 | const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8; |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1666 | FLAC__byte buffer[4]; /* magic number is asserted below */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1667 | |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1668 | FLAC__ASSERT(max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == 4); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1669 | FLAC__ASSERT(0 != file); |
| 1670 | |
| 1671 | pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len); |
| 1672 | if(fwrite(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1673 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1674 | if(fwrite(block->vendor_string.entry, 1, block->vendor_string.length, file) != block->vendor_string.length) |
| 1675 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1676 | |
| 1677 | pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len); |
| 1678 | if(fwrite(buffer, 1, num_comments_len, file) != num_comments_len) |
| 1679 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1680 | |
| 1681 | for(i = 0; i < block->num_comments; i++) { |
| 1682 | pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len); |
| 1683 | if(fwrite(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1684 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1685 | if(fwrite(block->comments[i].entry, 1, block->comments[i].length, file) != block->comments[i].length) |
| 1686 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1687 | } |
| 1688 | |
| 1689 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1690 | } |
| 1691 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1692 | FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1693 | { |
| 1694 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1695 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1696 | return false; |
| 1697 | } |
| 1698 | |
| 1699 | if(!write_metadata_block_header_(iterator->file, &iterator->status, block)) |
| 1700 | return false; |
| 1701 | |
| 1702 | if(!write_metadata_block_data_(iterator->file, &iterator->status, block)) |
| 1703 | return false; |
| 1704 | |
| 1705 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1706 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1707 | return false; |
| 1708 | } |
| 1709 | |
| 1710 | return read_metadata_block_header_(iterator); |
| 1711 | } |
| 1712 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1713 | FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1714 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1715 | FLAC__StreamMetadata *padding; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1716 | |
| 1717 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1718 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1719 | return false; |
| 1720 | } |
| 1721 | |
| 1722 | block->is_last = false; |
| 1723 | |
| 1724 | if(!write_metadata_block_header_(iterator->file, &iterator->status, block)) |
| 1725 | return false; |
| 1726 | |
| 1727 | if(!write_metadata_block_data_(iterator->file, &iterator->status, block)) |
| 1728 | return false; |
| 1729 | |
| 1730 | if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) |
| 1731 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1732 | |
| 1733 | padding->is_last = padding_is_last; |
| 1734 | padding->length = padding_length; |
| 1735 | |
| 1736 | if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) { |
| 1737 | FLAC__metadata_object_delete(padding); |
| 1738 | return false; |
| 1739 | } |
| 1740 | |
| 1741 | if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) { |
| 1742 | FLAC__metadata_object_delete(padding); |
| 1743 | return false; |
| 1744 | } |
| 1745 | |
| 1746 | FLAC__metadata_object_delete(padding); |
| 1747 | |
| 1748 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1749 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1750 | return false; |
| 1751 | } |
| 1752 | |
| 1753 | return read_metadata_block_header_(iterator); |
| 1754 | } |
| 1755 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1756 | FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1757 | { |
| 1758 | FILE *tempfile; |
| 1759 | char *tempfilename; |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 1760 | int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */ |
| 1761 | long fixup_is_last_flag_offset = -1; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1762 | |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 1763 | FLAC__ASSERT(0 != block || append == false); |
| 1764 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 1765 | if(iterator->is_last) { |
| 1766 | if(append) { |
| 1767 | fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */ |
| 1768 | fixup_is_last_flag_offset = iterator->offset[iterator->depth]; |
| 1769 | } |
| 1770 | else if(0 == block) { |
| 1771 | simple_iterator_push_(iterator); |
| 1772 | if(!FLAC__metadata_simple_iterator_prev(iterator)) { |
| 1773 | (void)simple_iterator_pop_(iterator); |
| 1774 | return false; |
| 1775 | } |
| 1776 | fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */ |
| 1777 | fixup_is_last_flag_offset = iterator->offset[iterator->depth]; |
| 1778 | if(!simple_iterator_pop_(iterator)) |
| 1779 | return false; |
| 1780 | } |
| 1781 | } |
| 1782 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1783 | if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append)) |
| 1784 | return false; |
| 1785 | |
| 1786 | if(0 != block) { |
| 1787 | if(!write_metadata_block_header_(tempfile, &iterator->status, block)) { |
| 1788 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1789 | return false; |
| 1790 | } |
| 1791 | |
| 1792 | if(!write_metadata_block_data_(tempfile, &iterator->status, block)) { |
| 1793 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1794 | return false; |
| 1795 | } |
| 1796 | } |
| 1797 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 1798 | if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0)) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1799 | return false; |
| 1800 | |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 1801 | if(append) |
| 1802 | return FLAC__metadata_simple_iterator_next(iterator); |
| 1803 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1804 | return true; |
| 1805 | } |
| 1806 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1807 | FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1808 | { |
| 1809 | FILE *f; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1810 | FLAC__Metadata_Node *node; |
| 1811 | FLAC__Metadata_SimpleIteratorStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1812 | |
| 1813 | FLAC__ASSERT(0 != chain); |
| 1814 | FLAC__ASSERT(0 != chain->filename); |
| 1815 | FLAC__ASSERT(0 != chain->head); |
| 1816 | |
| 1817 | if(0 == (f = fopen(chain->filename, "r+b"))) { |
| 1818 | chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 1819 | return false; |
| 1820 | } |
| 1821 | if(0 != fseek(f, chain->first_offset, SEEK_SET)) { |
| 1822 | chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 1823 | return false; |
| 1824 | } |
| 1825 | |
| 1826 | for(node = chain->head; node; node = node->next) { |
| 1827 | if(!write_metadata_block_header_(f, &status, node->data)) { |
| 1828 | chain->status = get_equivalent_status_(status); |
| 1829 | return false; |
| 1830 | } |
| 1831 | if(!write_metadata_block_data_(f, &status, node->data)) { |
| 1832 | chain->status = get_equivalent_status_(status); |
| 1833 | return false; |
| 1834 | } |
| 1835 | } |
| 1836 | |
| 1837 | /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/ |
| 1838 | |
| 1839 | (void)fclose(f); |
| 1840 | |
| 1841 | return true; |
| 1842 | } |
| 1843 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1844 | FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1845 | { |
| 1846 | FILE *f, *tempfile; |
| 1847 | char *tempfilename; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1848 | FLAC__Metadata_SimpleIteratorStatus status; |
| 1849 | const FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1850 | |
| 1851 | FLAC__ASSERT(0 != chain); |
| 1852 | FLAC__ASSERT(0 != chain->filename); |
| 1853 | FLAC__ASSERT(0 != chain->head); |
| 1854 | |
| 1855 | /* copy the file prefix (data up to first metadata block */ |
| 1856 | if(0 == (f = fopen(chain->filename, "rb"))) { |
| 1857 | chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 1858 | return false; |
| 1859 | } |
| 1860 | if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) { |
| 1861 | chain->status = get_equivalent_status_(status); |
| 1862 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1863 | return false; |
| 1864 | } |
| 1865 | if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) { |
| 1866 | chain->status = get_equivalent_status_(status); |
| 1867 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1868 | return false; |
| 1869 | } |
| 1870 | |
| 1871 | /* write the metadata */ |
| 1872 | for(node = chain->head; node; node = node->next) { |
| 1873 | if(!write_metadata_block_header_(tempfile, &status, node->data)) { |
| 1874 | chain->status = get_equivalent_status_(status); |
| 1875 | return false; |
| 1876 | } |
| 1877 | if(!write_metadata_block_data_(tempfile, &status, node->data)) { |
| 1878 | chain->status = get_equivalent_status_(status); |
| 1879 | return false; |
| 1880 | } |
| 1881 | } |
| 1882 | /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/ |
| 1883 | |
| 1884 | /* copy the file postfix (everything after the metadata) */ |
| 1885 | if(0 != fseek(f, chain->last_offset, SEEK_SET)) { |
| 1886 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1887 | chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 1888 | return false; |
| 1889 | } |
| 1890 | if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) { |
| 1891 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1892 | chain->status = get_equivalent_status_(status); |
| 1893 | return false; |
| 1894 | } |
| 1895 | |
| 1896 | /* move the tempfile on top of the original */ |
| 1897 | (void)fclose(f); |
| 1898 | if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status)) |
| 1899 | return false; |
| 1900 | |
| 1901 | return true; |
| 1902 | } |
| 1903 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1904 | void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1905 | { |
| 1906 | FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH); |
| 1907 | iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth]; |
| 1908 | iterator->depth++; |
| 1909 | } |
| 1910 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1911 | FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1912 | { |
| 1913 | FLAC__ASSERT(iterator->depth > 0); |
| 1914 | iterator->depth--; |
| 1915 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1916 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1917 | return false; |
| 1918 | } |
| 1919 | |
| 1920 | return read_metadata_block_header_(iterator); |
| 1921 | } |
| 1922 | |
| 1923 | unsigned seek_to_first_metadata_block_(FILE *f) |
| 1924 | { |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1925 | FLAC__byte buffer[4]; |
| 1926 | size_t n; |
| 1927 | unsigned i; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1928 | |
| 1929 | FLAC__ASSERT(0 != f); |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1930 | FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == 4); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1931 | |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1932 | /* skip any id3v2 tag */ |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1933 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 1934 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1935 | errno = 0; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1936 | #endif |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1937 | n = fread(buffer, 1, 4, f); |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1938 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 1939 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1940 | if(errno) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1941 | return 1; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1942 | else |
| 1943 | #endif |
| 1944 | if(n != 4) |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1945 | return 2; |
| 1946 | else if(0 == memcmp(buffer, "ID3", 3)) { |
| 1947 | unsigned tag_length = 0; |
| 1948 | |
| 1949 | /* skip to the tag length */ |
| 1950 | if(fseek(f, 2, SEEK_CUR) < 0) |
| 1951 | return 1; |
| 1952 | |
| 1953 | /* read the length */ |
| 1954 | for(i = 0; i < 4; i++) { |
| 1955 | if(fread(buffer, 1, 1, f) < 1 || buffer[0] & 0x80) |
| 1956 | return 1; |
| 1957 | tag_length <<= 7; |
| 1958 | tag_length |= (buffer[0] & 0x7f); |
| 1959 | } |
| 1960 | |
| 1961 | /* skip the rest of the tag */ |
| 1962 | if(fseek(f, tag_length, SEEK_CUR) < 0) |
| 1963 | return 1; |
| 1964 | |
| 1965 | /* read the stream sync code */ |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1966 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 1967 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1968 | errno = 0; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1969 | #endif |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1970 | n = fread(buffer, 1, 4, f); |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1971 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 1972 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1973 | if(errno) |
| 1974 | return 1; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1975 | else |
| 1976 | #endif |
| 1977 | if(n != 4) |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1978 | return 2; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1979 | } |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1980 | |
| 1981 | /* check for the fLaC signature */ |
| 1982 | if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH)) |
| 1983 | return 0; |
| 1984 | else |
| 1985 | return 2; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1986 | } |
| 1987 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1988 | FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1989 | { |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1990 | const long offset_end = append? iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length : iterator->offset[iterator->depth]; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1991 | |
| 1992 | if(0 != fseek(iterator->file, 0, SEEK_SET)) { |
| 1993 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1994 | return false; |
| 1995 | } |
| 1996 | if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) { |
| 1997 | cleanup_tempfile_(tempfile, tempfilename); |
| 1998 | return false; |
| 1999 | } |
| 2000 | if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) { |
| 2001 | cleanup_tempfile_(tempfile, tempfilename); |
| 2002 | return false; |
| 2003 | } |
| 2004 | |
| 2005 | return true; |
| 2006 | } |
| 2007 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2008 | FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, long fixup_is_last_flag_offset, FLAC__bool backup) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2009 | { |
| 2010 | long save_offset = iterator->offset[iterator->depth]; /*@@@ 2G limit */ |
| 2011 | FLAC__ASSERT(0 != *tempfile); |
| 2012 | |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 2013 | if(0 != fseek(iterator->file, save_offset + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length, SEEK_SET)) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2014 | cleanup_tempfile_(tempfile, tempfilename); |
| 2015 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2016 | return false; |
| 2017 | } |
| 2018 | if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) { |
| 2019 | cleanup_tempfile_(tempfile, tempfilename); |
| 2020 | return false; |
| 2021 | } |
| 2022 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 2023 | if(fixup_is_last_code != 0) { |
| 2024 | /* |
| 2025 | * if code == 1, it means a block was appended to the end so |
| 2026 | * we have to clear the is_last flag of the previous block |
| 2027 | * if code == -1, it means the last block was deleted so |
| 2028 | * we have to set the is_last flag of the previous block |
| 2029 | */ |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 2030 | /*@@@ MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2031 | FLAC__byte x; |
| 2032 | if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) { |
| 2033 | cleanup_tempfile_(tempfile, tempfilename); |
| 2034 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2035 | return false; |
| 2036 | } |
| 2037 | if(fread(&x, 1, 1, *tempfile) != 1) { |
| 2038 | cleanup_tempfile_(tempfile, tempfilename); |
| 2039 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2040 | return false; |
| 2041 | } |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 2042 | if(fixup_is_last_code > 0) { |
| 2043 | FLAC__ASSERT(x & 0x80); |
| 2044 | x &= 0x7f; |
| 2045 | } |
| 2046 | else { |
| 2047 | FLAC__ASSERT(!(x & 0x80)); |
| 2048 | x |= 0x80; |
| 2049 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2050 | if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) { |
| 2051 | cleanup_tempfile_(tempfile, tempfilename); |
| 2052 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2053 | return false; |
| 2054 | } |
| 2055 | if(fwrite(&x, 1, 1, *tempfile) != 1) { |
| 2056 | cleanup_tempfile_(tempfile, tempfilename); |
| 2057 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2058 | return false; |
| 2059 | } |
| 2060 | } |
| 2061 | |
| 2062 | (void)fclose(iterator->file); |
| 2063 | |
| 2064 | if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status)) |
| 2065 | return false; |
| 2066 | |
| 2067 | if(iterator->has_stats) |
| 2068 | set_file_stats_(iterator->filename, &iterator->stats); |
| 2069 | |
Josh Coalson | 3ac6693 | 2002-08-30 05:41:31 +0000 | [diff] [blame] | 2070 | if(!simple_iterator_prime_input_(iterator, !iterator->is_writable)) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2071 | return false; |
| 2072 | if(backup) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 2073 | while(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length < save_offset) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2074 | if(!FLAC__metadata_simple_iterator_next(iterator)) |
| 2075 | return false; |
| 2076 | return true; |
| 2077 | } |
| 2078 | else { |
| 2079 | /* move the iterator to it's original block faster by faking a push, then doing a pop_ */ |
| 2080 | FLAC__ASSERT(iterator->depth == 0); |
| 2081 | iterator->offset[0] = save_offset; |
| 2082 | iterator->depth++; |
| 2083 | return simple_iterator_pop_(iterator); |
| 2084 | } |
| 2085 | } |
| 2086 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2087 | FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2088 | { |
| 2089 | FLAC__byte buffer[8192]; |
| 2090 | unsigned n; |
| 2091 | |
| 2092 | while(bytes > 0) { |
| 2093 | n = min(sizeof(buffer), bytes); |
| 2094 | if(fread(buffer, 1, n, file) != n) { |
| 2095 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2096 | return false; |
| 2097 | } |
| 2098 | if(fwrite(buffer, 1, n, tempfile) != n) { |
| 2099 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2100 | return false; |
| 2101 | } |
| 2102 | bytes -= n; |
| 2103 | } |
| 2104 | |
| 2105 | return true; |
| 2106 | } |
| 2107 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2108 | FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2109 | { |
| 2110 | FLAC__byte buffer[8192]; |
| 2111 | size_t n; |
| 2112 | |
| 2113 | while(!feof(file)) { |
| 2114 | n = fread(buffer, 1, sizeof(buffer), file); |
| 2115 | if(n == 0 && !feof(file)) { |
| 2116 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2117 | return false; |
| 2118 | } |
| 2119 | if(n > 0 && fwrite(buffer, 1, n, tempfile) != n) { |
| 2120 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2121 | return false; |
| 2122 | } |
| 2123 | } |
| 2124 | |
| 2125 | return true; |
| 2126 | } |
| 2127 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2128 | FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2129 | { |
| 2130 | static const char *tempfile_suffix = ".metadata_edit"; |
| 2131 | if(0 == tempfile_path_prefix) { |
| 2132 | if(0 == (*tempfilename = malloc(strlen(filename) + strlen(tempfile_suffix) + 1))) { |
| 2133 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2134 | return false; |
| 2135 | } |
| 2136 | strcpy(*tempfilename, filename); |
| 2137 | strcat(*tempfilename, tempfile_suffix); |
| 2138 | } |
| 2139 | else { |
| 2140 | const char *p = strrchr(filename, '/'); |
| 2141 | if(0 == p) |
| 2142 | p = filename; |
| 2143 | else |
| 2144 | p++; |
| 2145 | |
| 2146 | if(0 == (*tempfilename = malloc(strlen(tempfile_path_prefix) + 1 + strlen(p) + strlen(tempfile_suffix) + 1))) { |
| 2147 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2148 | return false; |
| 2149 | } |
| 2150 | strcpy(*tempfilename, tempfile_path_prefix); |
| 2151 | strcat(*tempfilename, "/"); |
| 2152 | strcat(*tempfilename, p); |
| 2153 | strcat(*tempfilename, tempfile_suffix); |
| 2154 | } |
| 2155 | |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 2156 | if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2157 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 2158 | return false; |
| 2159 | } |
| 2160 | |
| 2161 | return true; |
| 2162 | } |
| 2163 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2164 | FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2165 | { |
| 2166 | FLAC__ASSERT(0 != filename); |
| 2167 | FLAC__ASSERT(0 != tempfile); |
| 2168 | FLAC__ASSERT(0 != *tempfile); |
| 2169 | FLAC__ASSERT(0 != tempfilename); |
| 2170 | FLAC__ASSERT(0 != *tempfilename); |
| 2171 | FLAC__ASSERT(0 != status); |
| 2172 | |
| 2173 | (void)fclose(*tempfile); |
| 2174 | *tempfile = 0; |
Josh Coalson | d57c8d3 | 2002-06-11 06:15:28 +0000 | [diff] [blame] | 2175 | |
| 2176 | #if defined _MSC_VER || defined __MINGW32__ |
| 2177 | if(unlink(filename) < 0) { |
| 2178 | cleanup_tempfile_(tempfile, tempfilename); |
| 2179 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR; |
| 2180 | return false; |
| 2181 | } |
| 2182 | #endif |
| 2183 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2184 | /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */ |
| 2185 | if(0 != rename(*tempfilename, filename)) { |
| 2186 | cleanup_tempfile_(tempfile, tempfilename); |
| 2187 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR; |
| 2188 | return false; |
| 2189 | } |
| 2190 | |
| 2191 | cleanup_tempfile_(tempfile, tempfilename); |
| 2192 | |
| 2193 | return true; |
| 2194 | } |
| 2195 | |
| 2196 | void cleanup_tempfile_(FILE **tempfile, char **tempfilename) |
| 2197 | { |
| 2198 | if(0 != *tempfile) { |
| 2199 | (void)fclose(*tempfile); |
| 2200 | *tempfile = 0; |
| 2201 | } |
| 2202 | |
| 2203 | if(0 != *tempfilename) { |
| 2204 | (void)unlink(*tempfilename); |
| 2205 | free(*tempfilename); |
| 2206 | *tempfilename = 0; |
| 2207 | } |
| 2208 | } |
| 2209 | |
| 2210 | FLAC__bool get_file_stats_(const char *filename, struct stat *stats) |
| 2211 | { |
| 2212 | FLAC__ASSERT(0 != filename); |
| 2213 | FLAC__ASSERT(0 != stats); |
| 2214 | return (0 == stat(filename, stats)); |
| 2215 | } |
| 2216 | |
| 2217 | void set_file_stats_(const char *filename, struct stat *stats) |
| 2218 | { |
| 2219 | struct utimbuf srctime; |
| 2220 | |
| 2221 | FLAC__ASSERT(0 != filename); |
| 2222 | FLAC__ASSERT(0 != stats); |
| 2223 | |
| 2224 | srctime.actime = stats->st_atime; |
| 2225 | srctime.modtime = stats->st_mtime; |
| 2226 | (void)chmod(filename, stats->st_mode); |
| 2227 | (void)utime(filename, &srctime); |
| 2228 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 2229 | (void)chown(filename, stats->st_uid, -1); |
| 2230 | (void)chown(filename, -1, stats->st_gid); |
| 2231 | #endif |
| 2232 | } |
| 2233 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2234 | FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2235 | { |
| 2236 | switch(status) { |
| 2237 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK: |
| 2238 | return FLAC__METADATA_CHAIN_STATUS_OK; |
| 2239 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT: |
| 2240 | return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT; |
| 2241 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE: |
| 2242 | return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 2243 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE: |
| 2244 | return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE; |
| 2245 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE: |
| 2246 | return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE; |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 2247 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA: |
| 2248 | return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2249 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR: |
| 2250 | return FLAC__METADATA_CHAIN_STATUS_READ_ERROR; |
| 2251 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR: |
| 2252 | return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 2253 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR: |
| 2254 | return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR; |
| 2255 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR: |
| 2256 | return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR; |
| 2257 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR: |
| 2258 | return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR; |
| 2259 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR: |
| 2260 | return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2261 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR: |
| 2262 | default: |
| 2263 | return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; |
| 2264 | } |
| 2265 | } |