Josh Coalson | 26560dd | 2001-02-08 00:38:41 +0000 | [diff] [blame] | 1 | /* libFLAC - Free Lossless Audio Codec library |
Josh Coalson | afae69f | 2003-01-02 07:03:16 +0000 | [diff] [blame^] | 2 | * Copyright (C) 2000,2001,2002,2003 Josh Coalson |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 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 | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 20 | #include <stdio.h> |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 21 | #include <stdlib.h> /* for qsort() */ |
Josh Coalson | 0d36cbd | 2002-07-15 05:24:56 +0000 | [diff] [blame] | 22 | #include "FLAC/assert.h" |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 23 | #include "FLAC/format.h" |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 24 | #include "private/format.h" |
| 25 | |
Matt Zimmerman | e525917 | 2002-10-10 16:51:06 +0000 | [diff] [blame] | 26 | #ifdef HAVE_CONFIG_H |
| 27 | #include <config.h> |
| 28 | #endif |
| 29 | |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 30 | #ifdef min |
| 31 | #undef min |
| 32 | #endif |
| 33 | #define min(a,b) ((a)<(b)?(a):(b)) |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 34 | |
Josh Coalson | 82738b3 | 2002-09-25 06:09:47 +0000 | [diff] [blame] | 35 | /* VERSION should come from configure */ |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 36 | FLAC_API const char *FLAC__VERSION_STRING = VERSION; |
Josh Coalson | 82738b3 | 2002-09-25 06:09:47 +0000 | [diff] [blame] | 37 | |
Josh Coalson | 0aad38b | 2002-09-09 05:06:51 +0000 | [diff] [blame] | 38 | #if defined _MSC_VER || defined __MINW32__ |
| 39 | /* yet one more hack because of MSVC6: */ |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 40 | FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC 1.0.4 20020924"; |
Josh Coalson | 0aad38b | 2002-09-09 05:06:51 +0000 | [diff] [blame] | 41 | #else |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 42 | FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC " VERSION " 20020924"; |
Josh Coalson | 0aad38b | 2002-09-09 05:06:51 +0000 | [diff] [blame] | 43 | #endif |
| 44 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 45 | FLAC_API const FLAC__byte FLAC__STREAM_SYNC_STRING[4] = { 'f','L','a','C' }; |
| 46 | FLAC_API const unsigned FLAC__STREAM_SYNC = 0x664C6143; |
| 47 | FLAC_API const unsigned FLAC__STREAM_SYNC_LEN = 32; /* bits */; |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 48 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 49 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN = 16; /* bits */ |
| 50 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN = 16; /* bits */ |
| 51 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN = 24; /* bits */ |
| 52 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN = 24; /* bits */ |
| 53 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN = 20; /* bits */ |
| 54 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN = 3; /* bits */ |
| 55 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN = 5; /* bits */ |
| 56 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN = 36; /* bits */ |
| 57 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MD5SUM_LEN = 128; /* bits */ |
Josh Coalson | 2013572 | 2001-02-23 21:05:53 +0000 | [diff] [blame] | 58 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 59 | FLAC_API const unsigned FLAC__STREAM_METADATA_APPLICATION_ID_LEN = 32; /* bits */ |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 60 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 61 | FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN = 64; /* bits */ |
| 62 | FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN = 64; /* bits */ |
| 63 | FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN = 16; /* bits */ |
Josh Coalson | c5d08e0 | 2001-04-10 19:13:50 +0000 | [diff] [blame] | 64 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 65 | FLAC_API const FLAC__uint64 FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER = 0xffffffffffffffff; |
Josh Coalson | 167658a | 2001-04-13 18:22:25 +0000 | [diff] [blame] | 66 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 67 | FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN = 32; /* bits */ |
| 68 | FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN = 32; /* bits */ |
Josh Coalson | cc059bc | 2002-05-04 17:35:51 +0000 | [diff] [blame] | 69 | |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 70 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN = 64; /* bits */ |
| 71 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN = 8; /* bits */ |
| 72 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN = 3*8; /* bits @@@@3*/ |
| 73 | |
| 74 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN = 64; /* bits */ |
| 75 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN = 8; /* bits */ |
| 76 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN = 12*8; /* bits */ |
| 77 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN = 1; /* bit */ |
| 78 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN = 1; /* bit */ |
Josh Coalson | 3a20382 | 2002-12-03 06:31:41 +0000 | [diff] [blame] | 79 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN = 6+13*8; /* bits @@@@13*/ |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 80 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN = 8; /* bits */ |
| 81 | |
| 82 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN = 128*8; /* bits */ |
| 83 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN = 64; /* bits */ |
Josh Coalson | 8f0c71b | 2002-12-05 06:37:46 +0000 | [diff] [blame] | 84 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN = 1; /* bit */ |
| 85 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN = 7+258*8; /* bits @@@@258 */ |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 86 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN = 8; /* bits */ |
| 87 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 88 | FLAC_API const unsigned FLAC__STREAM_METADATA_IS_LAST_LEN = 1; /* bits */ |
| 89 | FLAC_API const unsigned FLAC__STREAM_METADATA_TYPE_LEN = 7; /* bits */ |
| 90 | FLAC_API const unsigned FLAC__STREAM_METADATA_LENGTH_LEN = 24; /* bits */ |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 91 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 92 | FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC = 0x3ffe; |
| 93 | FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC_LEN = 14; /* bits */ |
| 94 | FLAC_API const unsigned FLAC__FRAME_HEADER_RESERVED_LEN = 2; /* bits */ |
| 95 | FLAC_API const unsigned FLAC__FRAME_HEADER_BLOCK_SIZE_LEN = 4; /* bits */ |
| 96 | FLAC_API const unsigned FLAC__FRAME_HEADER_SAMPLE_RATE_LEN = 4; /* bits */ |
| 97 | FLAC_API const unsigned FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN = 4; /* bits */ |
| 98 | FLAC_API const unsigned FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN = 3; /* bits */ |
| 99 | FLAC_API const unsigned FLAC__FRAME_HEADER_ZERO_PAD_LEN = 1; /* bits */ |
| 100 | FLAC_API const unsigned FLAC__FRAME_HEADER_CRC_LEN = 8; /* bits */ |
Josh Coalson | 215af57 | 2001-03-27 01:15:58 +0000 | [diff] [blame] | 101 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 102 | FLAC_API const unsigned FLAC__FRAME_FOOTER_CRC_LEN = 16; /* bits */ |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 103 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 104 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_TYPE_LEN = 2; /* bits */ |
| 105 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN = 4; /* bits */ |
| 106 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN = 4; /* bits */ |
| 107 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN = 5; /* bits */ |
Josh Coalson | 2051dd4 | 2001-04-12 22:22:34 +0000 | [diff] [blame] | 108 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 109 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER = 15; /* == (1<<FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN)-1 */ |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 110 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 111 | FLAC_API const char * const FLAC__EntropyCodingMethodTypeString[] = { |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 112 | "PARTITIONED_RICE" |
| 113 | }; |
| 114 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 115 | FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN = 4; /* bits */ |
| 116 | FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN = 5; /* bits */ |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 117 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 118 | FLAC_API const unsigned FLAC__SUBFRAME_ZERO_PAD_LEN = 1; /* bits */ |
| 119 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LEN = 6; /* bits */ |
| 120 | FLAC_API const unsigned FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN = 1; /* bits */ |
Josh Coalson | 215af57 | 2001-03-27 01:15:58 +0000 | [diff] [blame] | 121 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 122 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK = 0x00; |
| 123 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK = 0x02; |
| 124 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK = 0x10; |
| 125 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK = 0x40; |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 126 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 127 | FLAC_API const char * const FLAC__SubframeTypeString[] = { |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 128 | "CONSTANT", |
| 129 | "VERBATIM", |
| 130 | "FIXED", |
| 131 | "LPC" |
| 132 | }; |
| 133 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 134 | FLAC_API const char * const FLAC__ChannelAssignmentString[] = { |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 135 | "INDEPENDENT", |
| 136 | "LEFT_SIDE", |
| 137 | "RIGHT_SIDE", |
| 138 | "MID_SIDE" |
| 139 | }; |
| 140 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 141 | FLAC_API const char * const FLAC__FrameNumberTypeString[] = { |
Josh Coalson | 9608463 | 2001-07-16 18:07:12 +0000 | [diff] [blame] | 142 | "FRAME_NUMBER_TYPE_FRAME_NUMBER", |
| 143 | "FRAME_NUMBER_TYPE_SAMPLE_NUMBER" |
| 144 | }; |
| 145 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 146 | FLAC_API const char * const FLAC__MetadataTypeString[] = { |
Josh Coalson | 2013572 | 2001-02-23 21:05:53 +0000 | [diff] [blame] | 147 | "STREAMINFO", |
| 148 | "PADDING", |
Josh Coalson | 9b04be7 | 2001-06-14 18:57:53 +0000 | [diff] [blame] | 149 | "APPLICATION", |
Josh Coalson | 7e19b54 | 2002-04-25 05:53:09 +0000 | [diff] [blame] | 150 | "SEEKTABLE", |
Josh Coalson | e486938 | 2002-11-15 05:41:48 +0000 | [diff] [blame] | 151 | "VORBIS_COMMENT", |
| 152 | "CUESHEET" |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 153 | }; |
Josh Coalson | cc059bc | 2002-05-04 17:35:51 +0000 | [diff] [blame] | 154 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 155 | FLAC_API FLAC__bool FLAC__format_sample_rate_is_valid(unsigned sample_rate) |
Josh Coalson | cc059bc | 2002-05-04 17:35:51 +0000 | [diff] [blame] | 156 | { |
| 157 | if( |
| 158 | sample_rate == 0 || |
| 159 | sample_rate > FLAC__MAX_SAMPLE_RATE || |
| 160 | ( |
Josh Coalson | 765ff50 | 2002-08-27 05:46:11 +0000 | [diff] [blame] | 161 | sample_rate >= (1u << 16) && |
Josh Coalson | cc059bc | 2002-05-04 17:35:51 +0000 | [diff] [blame] | 162 | !(sample_rate % 1000 == 0 || sample_rate % 10 == 0) |
| 163 | ) |
| 164 | ) { |
| 165 | return false; |
| 166 | } |
| 167 | else |
| 168 | return true; |
| 169 | } |
Josh Coalson | 0d36cbd | 2002-07-15 05:24:56 +0000 | [diff] [blame] | 170 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 171 | FLAC_API FLAC__bool FLAC__format_seektable_is_legal(const FLAC__StreamMetadata_SeekTable *seek_table) |
Josh Coalson | 0d36cbd | 2002-07-15 05:24:56 +0000 | [diff] [blame] | 172 | { |
| 173 | unsigned i; |
| 174 | FLAC__uint64 prev_sample_number = 0; |
| 175 | FLAC__bool got_prev = false; |
| 176 | |
| 177 | FLAC__ASSERT(0 != seek_table); |
| 178 | |
| 179 | for(i = 0; i < seek_table->num_points; i++) { |
| 180 | if(got_prev) { |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 181 | if( |
| 182 | seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER && |
| 183 | seek_table->points[i].sample_number <= prev_sample_number |
| 184 | ) |
Josh Coalson | 0d36cbd | 2002-07-15 05:24:56 +0000 | [diff] [blame] | 185 | return false; |
| 186 | } |
| 187 | prev_sample_number = seek_table->points[i].sample_number; |
| 188 | got_prev = true; |
| 189 | } |
| 190 | |
| 191 | return true; |
| 192 | } |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 193 | |
| 194 | /* used as the sort predicate for qsort() */ |
| 195 | static int seekpoint_compare_(const FLAC__StreamMetadata_SeekPoint *l, const FLAC__StreamMetadata_SeekPoint *r) |
| 196 | { |
| 197 | /* we don't just 'return l->sample_number - r->sample_number' since the result (FLAC__int64) might overflow an 'int' */ |
| 198 | if(l->sample_number == r->sample_number) |
| 199 | return 0; |
| 200 | else if(l->sample_number < r->sample_number) |
| 201 | return -1; |
| 202 | else |
| 203 | return 1; |
| 204 | } |
| 205 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 206 | FLAC_API unsigned FLAC__format_seektable_sort(FLAC__StreamMetadata_SeekTable *seek_table) |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 207 | { |
| 208 | unsigned i, j; |
| 209 | FLAC__bool first; |
| 210 | |
Josh Coalson | a0ac09a | 2002-08-16 05:40:16 +0000 | [diff] [blame] | 211 | FLAC__ASSERT(0 != seek_table); |
| 212 | |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 213 | /* sort the seekpoints */ |
| 214 | qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetadata_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare_); |
| 215 | |
| 216 | /* uniquify the seekpoints */ |
| 217 | first = true; |
| 218 | for(i = j = 0; i < seek_table->num_points; i++) { |
| 219 | if(seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER) { |
| 220 | if(!first) { |
| 221 | if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number) |
| 222 | continue; |
| 223 | } |
| 224 | } |
| 225 | first = false; |
| 226 | seek_table->points[j++] = seek_table->points[i]; |
| 227 | } |
| 228 | |
Josh Coalson | 08a6282 | 2002-08-01 07:33:36 +0000 | [diff] [blame] | 229 | for(i = j; i < seek_table->num_points; i++) { |
| 230 | seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER; |
| 231 | seek_table->points[i].stream_offset = 0; |
| 232 | seek_table->points[i].frame_samples = 0; |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | return j; |
| 236 | } |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 237 | |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 238 | FLAC_API FLAC__bool FLAC__format_cuesheet_is_legal(const FLAC__StreamMetadata_CueSheet *cue_sheet, FLAC__bool check_cd_da_subset, const char **violation) |
| 239 | { |
| 240 | unsigned i, j; |
| 241 | |
| 242 | if(check_cd_da_subset) { |
| 243 | if(cue_sheet->lead_in < 2 * 44100) { |
| 244 | if(violation) *violation = "CD-DA cue sheet must have a lead-in length of at least 2 seconds"; |
| 245 | return false; |
| 246 | } |
| 247 | if(cue_sheet->lead_in % 588 != 0) { |
| 248 | if(violation) *violation = "CD-DA cue sheet lead-in length must be evenly divisible by 588 samples"; |
| 249 | return false; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | if(cue_sheet->num_tracks == 0) { |
| 254 | if(violation) *violation = "cue sheet must have at least one track (the lead-out)"; |
| 255 | return false; |
| 256 | } |
| 257 | |
| 258 | if(check_cd_da_subset && cue_sheet->tracks[cue_sheet->num_tracks-1].number != 170) { |
| 259 | if(violation) *violation = "CD-DA cue sheet must have a lead-out track number 170 (0xAA)"; |
| 260 | return false; |
| 261 | } |
| 262 | |
| 263 | for(i = 0; i < cue_sheet->num_tracks; i++) { |
| 264 | if(cue_sheet->tracks[i].number == 0) { |
| 265 | if(violation) *violation = "cue sheet may not have a track number 0"; |
| 266 | return false; |
| 267 | } |
| 268 | |
| 269 | if(check_cd_da_subset) { |
| 270 | if(!((cue_sheet->tracks[i].number >= 1 && cue_sheet->tracks[i].number <= 99) || cue_sheet->tracks[i].number == 170)) { |
| 271 | if(violation) *violation = "CD-DA cue sheet track number must be 1-99 or 170"; |
| 272 | return false; |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | if(check_cd_da_subset && cue_sheet->tracks[i].offset % 588 != 0) { |
| 277 | if(violation) *violation = "CD-DA cue sheet track offset must be evenly divisible by 588 samples"; |
| 278 | return false; |
| 279 | } |
| 280 | |
Josh Coalson | 3f86cc7 | 2002-11-21 06:41:46 +0000 | [diff] [blame] | 281 | if(i < cue_sheet->num_tracks - 1) { |
| 282 | if(cue_sheet->tracks[i].num_indices == 0) { |
| 283 | if(violation) *violation = "cue sheet track must have at least one index point"; |
| 284 | return false; |
| 285 | } |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 286 | |
Josh Coalson | 3f86cc7 | 2002-11-21 06:41:46 +0000 | [diff] [blame] | 287 | if(cue_sheet->tracks[i].indices[0].number > 1) { |
| 288 | if(violation) *violation = "cue sheet track's first index number must be 0 or 1"; |
| 289 | return false; |
| 290 | } |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | for(j = 0; j < cue_sheet->tracks[i].num_indices; j++) { |
| 294 | if(check_cd_da_subset && cue_sheet->tracks[i].indices[j].offset % 588 != 0) { |
| 295 | if(violation) *violation = "CD-DA cue sheet track index offset must be evenly divisible by 588 samples"; |
| 296 | return false; |
| 297 | } |
| 298 | |
| 299 | if(j > 0) { |
| 300 | if(cue_sheet->tracks[i].indices[j].number != cue_sheet->tracks[i].indices[j-1].number + 1) { |
| 301 | if(violation) *violation = "cue sheet track index numbers must increase by 1"; |
| 302 | return false; |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | return true; |
| 309 | } |
| 310 | |
| 311 | /* |
| 312 | * These routines are private to libFLAC |
| 313 | */ |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 314 | unsigned FLAC__format_get_max_rice_partition_order(unsigned blocksize, unsigned predictor_order) |
| 315 | { |
| 316 | return |
| 317 | FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order( |
| 318 | FLAC__format_get_max_rice_partition_order_from_blocksize(blocksize), |
| 319 | blocksize, |
| 320 | predictor_order |
| 321 | ); |
| 322 | } |
| 323 | |
| 324 | unsigned FLAC__format_get_max_rice_partition_order_from_blocksize(unsigned blocksize) |
| 325 | { |
| 326 | unsigned max_rice_partition_order = 0; |
| 327 | while(!(blocksize & 1)) { |
| 328 | max_rice_partition_order++; |
| 329 | blocksize >>= 1; |
| 330 | } |
| 331 | return min(FLAC__MAX_RICE_PARTITION_ORDER, max_rice_partition_order); |
| 332 | } |
| 333 | |
| 334 | unsigned FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(unsigned limit, unsigned blocksize, unsigned predictor_order) |
| 335 | { |
| 336 | unsigned max_rice_partition_order = limit; |
| 337 | |
| 338 | while(max_rice_partition_order > 0 && (blocksize >> max_rice_partition_order) <= predictor_order) |
| 339 | max_rice_partition_order--; |
| 340 | |
Josh Coalson | f12edc6 | 2002-10-11 06:24:33 +0000 | [diff] [blame] | 341 | FLAC__ASSERT( |
| 342 | (max_rice_partition_order == 0 && blocksize >= predictor_order) || |
| 343 | (max_rice_partition_order > 0 && blocksize >> max_rice_partition_order > predictor_order) |
| 344 | ); |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 345 | |
| 346 | return max_rice_partition_order; |
| 347 | } |
| 348 | |
Josh Coalson | a37ba46 | 2002-08-19 21:36:39 +0000 | [diff] [blame] | 349 | void FLAC__format_entropy_coding_method_partitioned_rice_contents_init(FLAC__EntropyCodingMethod_PartitionedRiceContents *object) |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 350 | { |
| 351 | FLAC__ASSERT(0 != object); |
| 352 | |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 353 | object->parameters = 0; |
| 354 | object->raw_bits = 0; |
| 355 | object->capacity_by_order = 0; |
| 356 | } |
| 357 | |
Josh Coalson | a37ba46 | 2002-08-19 21:36:39 +0000 | [diff] [blame] | 358 | void FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(FLAC__EntropyCodingMethod_PartitionedRiceContents *object) |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 359 | { |
| 360 | FLAC__ASSERT(0 != object); |
| 361 | |
| 362 | if(0 != object->parameters) |
| 363 | free(object->parameters); |
| 364 | if(0 != object->raw_bits) |
| 365 | free(object->raw_bits); |
Josh Coalson | a37ba46 | 2002-08-19 21:36:39 +0000 | [diff] [blame] | 366 | FLAC__format_entropy_coding_method_partitioned_rice_contents_init(object); |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 367 | } |
| 368 | |
Josh Coalson | a37ba46 | 2002-08-19 21:36:39 +0000 | [diff] [blame] | 369 | FLAC__bool FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(FLAC__EntropyCodingMethod_PartitionedRiceContents *object, unsigned max_partition_order) |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 370 | { |
| 371 | FLAC__ASSERT(0 != object); |
| 372 | |
| 373 | FLAC__ASSERT(object->capacity_by_order > 0 || (0 == object->parameters && 0 == object->raw_bits)); |
| 374 | |
| 375 | if(object->capacity_by_order < max_partition_order) { |
Josh Coalson | 5e3fcb2 | 2002-11-06 07:11:26 +0000 | [diff] [blame] | 376 | if(0 == (object->parameters = (unsigned*)realloc(object->parameters, sizeof(unsigned)*(1 << max_partition_order)))) |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 377 | return false; |
Josh Coalson | 5e3fcb2 | 2002-11-06 07:11:26 +0000 | [diff] [blame] | 378 | if(0 == (object->raw_bits = (unsigned*)realloc(object->raw_bits, sizeof(unsigned)*(1 << max_partition_order)))) |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 379 | return false; |
| 380 | object->capacity_by_order = max_partition_order; |
| 381 | } |
| 382 | |
| 383 | return true; |
| 384 | } |