Josh Coalson | 26560dd | 2001-02-08 00:38:41 +0000 | [diff] [blame] | 1 | /* libFLAC - Free Lossless Audio Codec library |
Josh Coalson | a78fac6 | 2005-01-25 04:17:55 +0000 | [diff] [blame] | 2 | * Copyright (C) 2000,2001,2002,2003,2004,2005 Josh Coalson |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 3 | * |
Josh Coalson | afd8107 | 2003-01-31 23:34:56 +0000 | [diff] [blame] | 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 7 | * |
Josh Coalson | afd8107 | 2003-01-31 23:34:56 +0000 | [diff] [blame] | 8 | * - Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 10 | * |
Josh Coalson | afd8107 | 2003-01-31 23:34:56 +0000 | [diff] [blame] | 11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * - Neither the name of the Xiph.org Foundation nor the names of its |
| 16 | * contributors may be used to endorse or promote products derived from |
| 17 | * this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 21 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 22 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 30 | */ |
| 31 | |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 32 | #include <stdio.h> |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 33 | #include <stdlib.h> /* for qsort() */ |
Josh Coalson | 0d36cbd | 2002-07-15 05:24:56 +0000 | [diff] [blame] | 34 | #include "FLAC/assert.h" |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 35 | #include "FLAC/format.h" |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 36 | #include "private/format.h" |
| 37 | |
Matt Zimmerman | e525917 | 2002-10-10 16:51:06 +0000 | [diff] [blame] | 38 | #ifdef HAVE_CONFIG_H |
| 39 | #include <config.h> |
| 40 | #endif |
| 41 | |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 42 | #ifdef min |
| 43 | #undef min |
| 44 | #endif |
| 45 | #define min(a,b) ((a)<(b)?(a):(b)) |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 46 | |
Josh Coalson | 49623ea | 2004-07-29 06:28:59 +0000 | [diff] [blame] | 47 | /* adjust for compilers that can't understand using LLU suffix for uint64_t literals */ |
| 48 | #ifdef _MSC_VER |
| 49 | #define FLAC__U64L(x) x |
| 50 | #else |
| 51 | #define FLAC__U64L(x) x##LLU |
| 52 | #endif |
| 53 | |
Josh Coalson | 82738b3 | 2002-09-25 06:09:47 +0000 | [diff] [blame] | 54 | /* VERSION should come from configure */ |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 55 | FLAC_API const char *FLAC__VERSION_STRING = VERSION; |
Josh Coalson | 82738b3 | 2002-09-25 06:09:47 +0000 | [diff] [blame] | 56 | |
Josh Coalson | 0aad38b | 2002-09-09 05:06:51 +0000 | [diff] [blame] | 57 | #if defined _MSC_VER || defined __MINW32__ |
| 58 | /* yet one more hack because of MSVC6: */ |
Josh Coalson | 66142c9 | 2005-02-04 06:42:38 +0000 | [diff] [blame] | 59 | FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC 1.1.2 20050205"; |
Josh Coalson | 0aad38b | 2002-09-09 05:06:51 +0000 | [diff] [blame] | 60 | #else |
Josh Coalson | 66142c9 | 2005-02-04 06:42:38 +0000 | [diff] [blame] | 61 | FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC " VERSION " 20050205"; |
Josh Coalson | 0aad38b | 2002-09-09 05:06:51 +0000 | [diff] [blame] | 62 | #endif |
| 63 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 64 | FLAC_API const FLAC__byte FLAC__STREAM_SYNC_STRING[4] = { 'f','L','a','C' }; |
| 65 | FLAC_API const unsigned FLAC__STREAM_SYNC = 0x664C6143; |
| 66 | FLAC_API const unsigned FLAC__STREAM_SYNC_LEN = 32; /* bits */; |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 67 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 68 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN = 16; /* bits */ |
| 69 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN = 16; /* bits */ |
| 70 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN = 24; /* bits */ |
| 71 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN = 24; /* bits */ |
| 72 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN = 20; /* bits */ |
| 73 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN = 3; /* bits */ |
| 74 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN = 5; /* bits */ |
| 75 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN = 36; /* bits */ |
| 76 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MD5SUM_LEN = 128; /* bits */ |
Josh Coalson | 2013572 | 2001-02-23 21:05:53 +0000 | [diff] [blame] | 77 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 78 | FLAC_API const unsigned FLAC__STREAM_METADATA_APPLICATION_ID_LEN = 32; /* bits */ |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 79 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 80 | FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN = 64; /* bits */ |
| 81 | FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN = 64; /* bits */ |
| 82 | 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] | 83 | |
Josh Coalson | 49623ea | 2004-07-29 06:28:59 +0000 | [diff] [blame] | 84 | FLAC_API const FLAC__uint64 FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER = FLAC__U64L(0xffffffffffffffff); |
Josh Coalson | 167658a | 2001-04-13 18:22:25 +0000 | [diff] [blame] | 85 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 86 | FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN = 32; /* bits */ |
| 87 | 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] | 88 | |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 89 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN = 64; /* bits */ |
| 90 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN = 8; /* bits */ |
Josh Coalson | b3538c8 | 2003-01-12 08:42:23 +0000 | [diff] [blame] | 91 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN = 3*8; /* bits */ |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 92 | |
| 93 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN = 64; /* bits */ |
| 94 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN = 8; /* bits */ |
| 95 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN = 12*8; /* bits */ |
| 96 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN = 1; /* bit */ |
| 97 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN = 1; /* bit */ |
Josh Coalson | b3538c8 | 2003-01-12 08:42:23 +0000 | [diff] [blame] | 98 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN = 6+13*8; /* bits */ |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 99 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN = 8; /* bits */ |
| 100 | |
| 101 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN = 128*8; /* bits */ |
| 102 | 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] | 103 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN = 1; /* bit */ |
Josh Coalson | b3538c8 | 2003-01-12 08:42:23 +0000 | [diff] [blame] | 104 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN = 7+258*8; /* bits */ |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 105 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN = 8; /* bits */ |
| 106 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 107 | FLAC_API const unsigned FLAC__STREAM_METADATA_IS_LAST_LEN = 1; /* bits */ |
| 108 | FLAC_API const unsigned FLAC__STREAM_METADATA_TYPE_LEN = 7; /* bits */ |
| 109 | FLAC_API const unsigned FLAC__STREAM_METADATA_LENGTH_LEN = 24; /* bits */ |
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 unsigned FLAC__FRAME_HEADER_SYNC = 0x3ffe; |
| 112 | FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC_LEN = 14; /* bits */ |
| 113 | FLAC_API const unsigned FLAC__FRAME_HEADER_RESERVED_LEN = 2; /* bits */ |
| 114 | FLAC_API const unsigned FLAC__FRAME_HEADER_BLOCK_SIZE_LEN = 4; /* bits */ |
| 115 | FLAC_API const unsigned FLAC__FRAME_HEADER_SAMPLE_RATE_LEN = 4; /* bits */ |
| 116 | FLAC_API const unsigned FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN = 4; /* bits */ |
| 117 | FLAC_API const unsigned FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN = 3; /* bits */ |
| 118 | FLAC_API const unsigned FLAC__FRAME_HEADER_ZERO_PAD_LEN = 1; /* bits */ |
| 119 | FLAC_API const unsigned FLAC__FRAME_HEADER_CRC_LEN = 8; /* bits */ |
Josh Coalson | 215af57 | 2001-03-27 01:15:58 +0000 | [diff] [blame] | 120 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 121 | FLAC_API const unsigned FLAC__FRAME_FOOTER_CRC_LEN = 16; /* bits */ |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 122 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 123 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_TYPE_LEN = 2; /* bits */ |
| 124 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN = 4; /* bits */ |
| 125 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN = 4; /* bits */ |
| 126 | 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] | 127 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 128 | 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] | 129 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 130 | FLAC_API const char * const FLAC__EntropyCodingMethodTypeString[] = { |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 131 | "PARTITIONED_RICE" |
| 132 | }; |
| 133 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 134 | FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN = 4; /* bits */ |
| 135 | FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN = 5; /* bits */ |
Josh Coalson | bb7f6b9 | 2000-12-10 04:09:52 +0000 | [diff] [blame] | 136 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 137 | FLAC_API const unsigned FLAC__SUBFRAME_ZERO_PAD_LEN = 1; /* bits */ |
| 138 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LEN = 6; /* bits */ |
| 139 | FLAC_API const unsigned FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN = 1; /* bits */ |
Josh Coalson | 215af57 | 2001-03-27 01:15:58 +0000 | [diff] [blame] | 140 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 141 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK = 0x00; |
| 142 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK = 0x02; |
| 143 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK = 0x10; |
| 144 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK = 0x40; |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 145 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 146 | FLAC_API const char * const FLAC__SubframeTypeString[] = { |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 147 | "CONSTANT", |
| 148 | "VERBATIM", |
| 149 | "FIXED", |
| 150 | "LPC" |
| 151 | }; |
| 152 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 153 | FLAC_API const char * const FLAC__ChannelAssignmentString[] = { |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 154 | "INDEPENDENT", |
| 155 | "LEFT_SIDE", |
| 156 | "RIGHT_SIDE", |
| 157 | "MID_SIDE" |
| 158 | }; |
| 159 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 160 | FLAC_API const char * const FLAC__FrameNumberTypeString[] = { |
Josh Coalson | 9608463 | 2001-07-16 18:07:12 +0000 | [diff] [blame] | 161 | "FRAME_NUMBER_TYPE_FRAME_NUMBER", |
| 162 | "FRAME_NUMBER_TYPE_SAMPLE_NUMBER" |
| 163 | }; |
| 164 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 165 | FLAC_API const char * const FLAC__MetadataTypeString[] = { |
Josh Coalson | 2013572 | 2001-02-23 21:05:53 +0000 | [diff] [blame] | 166 | "STREAMINFO", |
| 167 | "PADDING", |
Josh Coalson | 9b04be7 | 2001-06-14 18:57:53 +0000 | [diff] [blame] | 168 | "APPLICATION", |
Josh Coalson | 7e19b54 | 2002-04-25 05:53:09 +0000 | [diff] [blame] | 169 | "SEEKTABLE", |
Josh Coalson | e486938 | 2002-11-15 05:41:48 +0000 | [diff] [blame] | 170 | "VORBIS_COMMENT", |
| 171 | "CUESHEET" |
Josh Coalson | 75d0a0b | 2001-01-24 00:42:16 +0000 | [diff] [blame] | 172 | }; |
Josh Coalson | cc059bc | 2002-05-04 17:35:51 +0000 | [diff] [blame] | 173 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 174 | 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] | 175 | { |
| 176 | if( |
| 177 | sample_rate == 0 || |
| 178 | sample_rate > FLAC__MAX_SAMPLE_RATE || |
| 179 | ( |
Josh Coalson | 765ff50 | 2002-08-27 05:46:11 +0000 | [diff] [blame] | 180 | sample_rate >= (1u << 16) && |
Josh Coalson | cc059bc | 2002-05-04 17:35:51 +0000 | [diff] [blame] | 181 | !(sample_rate % 1000 == 0 || sample_rate % 10 == 0) |
| 182 | ) |
| 183 | ) { |
| 184 | return false; |
| 185 | } |
| 186 | else |
| 187 | return true; |
| 188 | } |
Josh Coalson | 0d36cbd | 2002-07-15 05:24:56 +0000 | [diff] [blame] | 189 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 190 | 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] | 191 | { |
| 192 | unsigned i; |
| 193 | FLAC__uint64 prev_sample_number = 0; |
| 194 | FLAC__bool got_prev = false; |
| 195 | |
| 196 | FLAC__ASSERT(0 != seek_table); |
| 197 | |
| 198 | for(i = 0; i < seek_table->num_points; i++) { |
| 199 | if(got_prev) { |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 200 | if( |
| 201 | seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER && |
| 202 | seek_table->points[i].sample_number <= prev_sample_number |
| 203 | ) |
Josh Coalson | 0d36cbd | 2002-07-15 05:24:56 +0000 | [diff] [blame] | 204 | return false; |
| 205 | } |
| 206 | prev_sample_number = seek_table->points[i].sample_number; |
| 207 | got_prev = true; |
| 208 | } |
| 209 | |
| 210 | return true; |
| 211 | } |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 212 | |
| 213 | /* used as the sort predicate for qsort() */ |
| 214 | static int seekpoint_compare_(const FLAC__StreamMetadata_SeekPoint *l, const FLAC__StreamMetadata_SeekPoint *r) |
| 215 | { |
| 216 | /* we don't just 'return l->sample_number - r->sample_number' since the result (FLAC__int64) might overflow an 'int' */ |
| 217 | if(l->sample_number == r->sample_number) |
| 218 | return 0; |
| 219 | else if(l->sample_number < r->sample_number) |
| 220 | return -1; |
| 221 | else |
| 222 | return 1; |
| 223 | } |
| 224 | |
Josh Coalson | 6afed9f | 2002-10-16 22:29:47 +0000 | [diff] [blame] | 225 | FLAC_API unsigned FLAC__format_seektable_sort(FLAC__StreamMetadata_SeekTable *seek_table) |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 226 | { |
| 227 | unsigned i, j; |
| 228 | FLAC__bool first; |
| 229 | |
Josh Coalson | a0ac09a | 2002-08-16 05:40:16 +0000 | [diff] [blame] | 230 | FLAC__ASSERT(0 != seek_table); |
| 231 | |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 232 | /* sort the seekpoints */ |
| 233 | qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetadata_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare_); |
| 234 | |
| 235 | /* uniquify the seekpoints */ |
| 236 | first = true; |
| 237 | for(i = j = 0; i < seek_table->num_points; i++) { |
| 238 | if(seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER) { |
| 239 | if(!first) { |
| 240 | if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number) |
| 241 | continue; |
| 242 | } |
| 243 | } |
| 244 | first = false; |
| 245 | seek_table->points[j++] = seek_table->points[i]; |
| 246 | } |
| 247 | |
Josh Coalson | 08a6282 | 2002-08-01 07:33:36 +0000 | [diff] [blame] | 248 | for(i = j; i < seek_table->num_points; i++) { |
| 249 | seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER; |
| 250 | seek_table->points[i].stream_offset = 0; |
| 251 | seek_table->points[i].frame_samples = 0; |
Josh Coalson | 5a5de73 | 2002-08-01 06:37:11 +0000 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | return j; |
| 255 | } |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 256 | |
Josh Coalson | 2de1124 | 2004-12-30 03:41:19 +0000 | [diff] [blame] | 257 | static __inline unsigned utf8len_(const FLAC__byte *utf8) |
| 258 | { |
| 259 | FLAC__ASSERT(0 != utf8); |
| 260 | if ((utf8[0] & 0x80) == 0) |
| 261 | return 1; |
| 262 | else if ((utf8[0] & 0xE0) == 0xC0 && (utf8[1] & 0xC0) == 0x80) |
| 263 | return 2; |
| 264 | else if ((utf8[0] & 0xF0) == 0xE0 && (utf8[1] & 0xC0) == 0x80 && (utf8[2] & 0xC0) == 0x80) |
| 265 | return 3; |
| 266 | else |
| 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_name_is_legal(const char *name) |
| 271 | { |
| 272 | char c; |
| 273 | for(c = *name; c; c = *(++name)) |
| 274 | if(c < 0x20 || c == 0x3d || c > 0x7d) |
| 275 | return false; |
| 276 | return true; |
| 277 | } |
| 278 | |
| 279 | FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_value_is_legal(const FLAC__byte *value, unsigned length) |
| 280 | { |
| 281 | if(length == (unsigned)(-1)) { |
| 282 | while(*value) { |
| 283 | unsigned n = utf8len_(value); |
| 284 | if(n == 0) |
| 285 | return false; |
| 286 | value += n; |
| 287 | } |
| 288 | } |
| 289 | else { |
| 290 | const FLAC__byte *end = value + length; |
| 291 | while(value < end) { |
| 292 | unsigned n = utf8len_(value); |
| 293 | if(n == 0) |
| 294 | return false; |
| 295 | value += n; |
| 296 | } |
| 297 | if(value != end) |
| 298 | return false; |
| 299 | } |
| 300 | return true; |
| 301 | } |
| 302 | |
| 303 | FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_is_legal(const FLAC__byte *entry, unsigned length) |
| 304 | { |
| 305 | const FLAC__byte *s, *end; |
| 306 | |
| 307 | for(s = entry, end = s + length; s < end && *s != '='; s++) { |
| 308 | if(*s < 0x20 || *s > 0x7D) |
| 309 | return false; |
| 310 | } |
| 311 | if(s == end) |
| 312 | return false; |
| 313 | |
| 314 | s++; /* skip '=' */ |
| 315 | |
| 316 | while(s < end) { |
| 317 | unsigned n = utf8len_(s); |
| 318 | if(n == 0) |
| 319 | return false; |
| 320 | s += n; |
| 321 | } |
| 322 | if(s != end) |
| 323 | return false; |
| 324 | |
| 325 | return true; |
| 326 | } |
| 327 | |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 328 | FLAC_API FLAC__bool FLAC__format_cuesheet_is_legal(const FLAC__StreamMetadata_CueSheet *cue_sheet, FLAC__bool check_cd_da_subset, const char **violation) |
| 329 | { |
| 330 | unsigned i, j; |
| 331 | |
| 332 | if(check_cd_da_subset) { |
| 333 | if(cue_sheet->lead_in < 2 * 44100) { |
| 334 | if(violation) *violation = "CD-DA cue sheet must have a lead-in length of at least 2 seconds"; |
| 335 | return false; |
| 336 | } |
| 337 | if(cue_sheet->lead_in % 588 != 0) { |
| 338 | if(violation) *violation = "CD-DA cue sheet lead-in length must be evenly divisible by 588 samples"; |
| 339 | return false; |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | if(cue_sheet->num_tracks == 0) { |
| 344 | if(violation) *violation = "cue sheet must have at least one track (the lead-out)"; |
| 345 | return false; |
| 346 | } |
| 347 | |
| 348 | if(check_cd_da_subset && cue_sheet->tracks[cue_sheet->num_tracks-1].number != 170) { |
| 349 | if(violation) *violation = "CD-DA cue sheet must have a lead-out track number 170 (0xAA)"; |
| 350 | return false; |
| 351 | } |
| 352 | |
| 353 | for(i = 0; i < cue_sheet->num_tracks; i++) { |
| 354 | if(cue_sheet->tracks[i].number == 0) { |
| 355 | if(violation) *violation = "cue sheet may not have a track number 0"; |
| 356 | return false; |
| 357 | } |
| 358 | |
| 359 | if(check_cd_da_subset) { |
| 360 | if(!((cue_sheet->tracks[i].number >= 1 && cue_sheet->tracks[i].number <= 99) || cue_sheet->tracks[i].number == 170)) { |
| 361 | if(violation) *violation = "CD-DA cue sheet track number must be 1-99 or 170"; |
| 362 | return false; |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | if(check_cd_da_subset && cue_sheet->tracks[i].offset % 588 != 0) { |
Josh Coalson | fe1d311 | 2005-08-24 00:14:23 +0000 | [diff] [blame^] | 367 | if(violation) |
| 368 | if(i == cue_sheet->num_tracks-1) /* the lead-out track... */ |
| 369 | *violation = "CD-DA cue sheet lead-out offset must be evenly divisible by 588 samples"; |
| 370 | else |
| 371 | *violation = "CD-DA cue sheet track offset must be evenly divisible by 588 samples"; |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 372 | return false; |
| 373 | } |
| 374 | |
Josh Coalson | 3f86cc7 | 2002-11-21 06:41:46 +0000 | [diff] [blame] | 375 | if(i < cue_sheet->num_tracks - 1) { |
| 376 | if(cue_sheet->tracks[i].num_indices == 0) { |
| 377 | if(violation) *violation = "cue sheet track must have at least one index point"; |
| 378 | return false; |
| 379 | } |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 380 | |
Josh Coalson | 3f86cc7 | 2002-11-21 06:41:46 +0000 | [diff] [blame] | 381 | if(cue_sheet->tracks[i].indices[0].number > 1) { |
| 382 | if(violation) *violation = "cue sheet track's first index number must be 0 or 1"; |
| 383 | return false; |
| 384 | } |
Josh Coalson | 8e9c451 | 2002-11-14 05:00:24 +0000 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | for(j = 0; j < cue_sheet->tracks[i].num_indices; j++) { |
| 388 | if(check_cd_da_subset && cue_sheet->tracks[i].indices[j].offset % 588 != 0) { |
| 389 | if(violation) *violation = "CD-DA cue sheet track index offset must be evenly divisible by 588 samples"; |
| 390 | return false; |
| 391 | } |
| 392 | |
| 393 | if(j > 0) { |
| 394 | if(cue_sheet->tracks[i].indices[j].number != cue_sheet->tracks[i].indices[j-1].number + 1) { |
| 395 | if(violation) *violation = "cue sheet track index numbers must increase by 1"; |
| 396 | return false; |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | return true; |
| 403 | } |
| 404 | |
| 405 | /* |
| 406 | * These routines are private to libFLAC |
| 407 | */ |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 408 | unsigned FLAC__format_get_max_rice_partition_order(unsigned blocksize, unsigned predictor_order) |
| 409 | { |
| 410 | return |
| 411 | FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order( |
| 412 | FLAC__format_get_max_rice_partition_order_from_blocksize(blocksize), |
| 413 | blocksize, |
| 414 | predictor_order |
| 415 | ); |
| 416 | } |
| 417 | |
| 418 | unsigned FLAC__format_get_max_rice_partition_order_from_blocksize(unsigned blocksize) |
| 419 | { |
| 420 | unsigned max_rice_partition_order = 0; |
| 421 | while(!(blocksize & 1)) { |
| 422 | max_rice_partition_order++; |
| 423 | blocksize >>= 1; |
| 424 | } |
| 425 | return min(FLAC__MAX_RICE_PARTITION_ORDER, max_rice_partition_order); |
| 426 | } |
| 427 | |
| 428 | unsigned FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(unsigned limit, unsigned blocksize, unsigned predictor_order) |
| 429 | { |
| 430 | unsigned max_rice_partition_order = limit; |
| 431 | |
| 432 | while(max_rice_partition_order > 0 && (blocksize >> max_rice_partition_order) <= predictor_order) |
| 433 | max_rice_partition_order--; |
| 434 | |
Josh Coalson | f12edc6 | 2002-10-11 06:24:33 +0000 | [diff] [blame] | 435 | FLAC__ASSERT( |
| 436 | (max_rice_partition_order == 0 && blocksize >= predictor_order) || |
| 437 | (max_rice_partition_order > 0 && blocksize >> max_rice_partition_order > predictor_order) |
| 438 | ); |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 439 | |
| 440 | return max_rice_partition_order; |
| 441 | } |
| 442 | |
Josh Coalson | a37ba46 | 2002-08-19 21:36:39 +0000 | [diff] [blame] | 443 | 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] | 444 | { |
| 445 | FLAC__ASSERT(0 != object); |
| 446 | |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 447 | object->parameters = 0; |
| 448 | object->raw_bits = 0; |
| 449 | object->capacity_by_order = 0; |
| 450 | } |
| 451 | |
Josh Coalson | a37ba46 | 2002-08-19 21:36:39 +0000 | [diff] [blame] | 452 | 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] | 453 | { |
| 454 | FLAC__ASSERT(0 != object); |
| 455 | |
| 456 | if(0 != object->parameters) |
| 457 | free(object->parameters); |
| 458 | if(0 != object->raw_bits) |
| 459 | free(object->raw_bits); |
Josh Coalson | a37ba46 | 2002-08-19 21:36:39 +0000 | [diff] [blame] | 460 | FLAC__format_entropy_coding_method_partitioned_rice_contents_init(object); |
Josh Coalson | cda4c3c | 2002-08-17 15:21:29 +0000 | [diff] [blame] | 461 | } |
| 462 | |
Josh Coalson | a37ba46 | 2002-08-19 21:36:39 +0000 | [diff] [blame] | 463 | 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] | 464 | { |
| 465 | FLAC__ASSERT(0 != object); |
| 466 | |
| 467 | FLAC__ASSERT(object->capacity_by_order > 0 || (0 == object->parameters && 0 == object->raw_bits)); |
| 468 | |
| 469 | if(object->capacity_by_order < max_partition_order) { |
Josh Coalson | 5e3fcb2 | 2002-11-06 07:11:26 +0000 | [diff] [blame] | 470 | 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] | 471 | return false; |
Josh Coalson | 5e3fcb2 | 2002-11-06 07:11:26 +0000 | [diff] [blame] | 472 | 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] | 473 | return false; |
| 474 | object->capacity_by_order = max_partition_order; |
| 475 | } |
| 476 | |
| 477 | return true; |
| 478 | } |