format.h

Go to the documentation of this file.
00001 /* libFLAC - Free Lossless Audio Codec library
00002  * Copyright (C) 2000-2009  Josh Coalson
00003  * Copyright (C) 2011-2014  Xiph.Org Foundation
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  * notice, this list of conditions and the following disclaimer.
00011  *
00012  * - Redistributions in binary form must reproduce the above copyright
00013  * notice, this list of conditions and the following disclaimer in the
00014  * documentation and/or other materials provided with the distribution.
00015  *
00016  * - Neither the name of the Xiph.org Foundation nor the names of its
00017  * contributors may be used to endorse or promote products derived from
00018  * this software without specific prior written permission.
00019  *
00020  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00021  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00022  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00023  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
00024  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00025  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00026  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00027  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00028  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00029  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00030  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00031  */
00032 
00033 #ifndef FLAC__FORMAT_H
00034 #define FLAC__FORMAT_H
00035 
00036 #include "export.h"
00037 #include "ordinals.h"
00038 
00039 #ifdef __cplusplus
00040 extern "C" {
00041 #endif
00042 
00087 /*
00088     Most of the values described in this file are defined by the FLAC
00089     format specification.  There is nothing to tune here.
00090 */
00091 
00093 #define FLAC__MAX_METADATA_TYPE_CODE (126u)
00094 
00096 #define FLAC__MIN_BLOCK_SIZE (16u)
00097 
00099 #define FLAC__MAX_BLOCK_SIZE (65535u)
00100 
00103 #define FLAC__SUBSET_MAX_BLOCK_SIZE_48000HZ (4608u)
00104 
00106 #define FLAC__MAX_CHANNELS (8u)
00107 
00109 #define FLAC__MIN_BITS_PER_SAMPLE (4u)
00110 
00112 #define FLAC__MAX_BITS_PER_SAMPLE (32u)
00113 
00122 #define FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE (24u)
00123 
00128 #define FLAC__MAX_SAMPLE_RATE (655350u)
00129 
00131 #define FLAC__MAX_LPC_ORDER (32u)
00132 
00135 #define FLAC__SUBSET_MAX_LPC_ORDER_48000HZ (12u)
00136 
00140 #define FLAC__MIN_QLP_COEFF_PRECISION (5u)
00141 
00145 #define FLAC__MAX_QLP_COEFF_PRECISION (15u)
00146 
00148 #define FLAC__MAX_FIXED_ORDER (4u)
00149 
00151 #define FLAC__MAX_RICE_PARTITION_ORDER (15u)
00152 
00154 #define FLAC__SUBSET_MAX_RICE_PARTITION_ORDER (8u)
00155 
00162 extern FLAC_API const char *FLAC__VERSION_STRING;
00163 
00168 extern FLAC_API const char *FLAC__VENDOR_STRING;
00169 
00171 extern FLAC_API const FLAC__byte FLAC__STREAM_SYNC_STRING[4]; /* = "fLaC" */
00172 
00176 extern FLAC_API const unsigned FLAC__STREAM_SYNC; /* = 0x664C6143 */
00177 
00179 extern FLAC_API const unsigned FLAC__STREAM_SYNC_LEN; /* = 32 bits */
00180 
00182 #define FLAC__STREAM_SYNC_LENGTH (4u)
00183 
00184 
00185 /*****************************************************************************
00186  *
00187  * Subframe structures
00188  *
00189  *****************************************************************************/
00190 
00191 /*****************************************************************************/
00192 
00194 typedef enum {
00195     FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE = 0,
00199     FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2 = 1
00202 } FLAC__EntropyCodingMethodType;
00203 
00209 extern FLAC_API const char * const FLAC__EntropyCodingMethodTypeString[];
00210 
00211 
00214 typedef struct {
00215 
00216     unsigned *parameters;
00219     unsigned *raw_bits;
00224     unsigned capacity_by_order;
00229 } FLAC__EntropyCodingMethod_PartitionedRiceContents;
00230 
00233 typedef struct {
00234 
00235     unsigned order;
00238     const FLAC__EntropyCodingMethod_PartitionedRiceContents *contents;
00241 } FLAC__EntropyCodingMethod_PartitionedRice;
00242 
00243 extern FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN; 
00244 extern FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN; 
00245 extern FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN; 
00246 extern FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN; 
00248 extern FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
00250 extern FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER;
00255 typedef struct {
00256     FLAC__EntropyCodingMethodType type;
00257     union {
00258         FLAC__EntropyCodingMethod_PartitionedRice partitioned_rice;
00259     } data;
00260 } FLAC__EntropyCodingMethod;
00261 
00262 extern FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_TYPE_LEN; 
00264 /*****************************************************************************/
00265 
00267 typedef enum {
00268     FLAC__SUBFRAME_TYPE_CONSTANT = 0, 
00269     FLAC__SUBFRAME_TYPE_VERBATIM = 1, 
00270     FLAC__SUBFRAME_TYPE_FIXED = 2, 
00271     FLAC__SUBFRAME_TYPE_LPC = 3 
00272 } FLAC__SubframeType;
00273 
00279 extern FLAC_API const char * const FLAC__SubframeTypeString[];
00280 
00281 
00284 typedef struct {
00285     FLAC__int32 value; 
00286 } FLAC__Subframe_Constant;
00287 
00288 
00291 typedef struct {
00292     const FLAC__int32 *data; 
00293 } FLAC__Subframe_Verbatim;
00294 
00295 
00298 typedef struct {
00299     FLAC__EntropyCodingMethod entropy_coding_method;
00302     unsigned order;
00305     FLAC__int32 warmup[FLAC__MAX_FIXED_ORDER];
00308     const FLAC__int32 *residual;
00310 } FLAC__Subframe_Fixed;
00311 
00312 
00315 typedef struct {
00316     FLAC__EntropyCodingMethod entropy_coding_method;
00319     unsigned order;
00322     unsigned qlp_coeff_precision;
00325     int quantization_level;
00328     FLAC__int32 qlp_coeff[FLAC__MAX_LPC_ORDER];
00331     FLAC__int32 warmup[FLAC__MAX_LPC_ORDER];
00334     const FLAC__int32 *residual;
00336 } FLAC__Subframe_LPC;
00337 
00338 extern FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN; 
00339 extern FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN; 
00344 typedef struct {
00345     FLAC__SubframeType type;
00346     union {
00347         FLAC__Subframe_Constant constant;
00348         FLAC__Subframe_Fixed fixed;
00349         FLAC__Subframe_LPC lpc;
00350         FLAC__Subframe_Verbatim verbatim;
00351     } data;
00352     unsigned wasted_bits;
00353 } FLAC__Subframe;
00354 
00362 extern FLAC_API const unsigned FLAC__SUBFRAME_ZERO_PAD_LEN;
00363 extern FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LEN; 
00364 extern FLAC_API const unsigned FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN; 
00366 extern FLAC_API const unsigned FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK; 
00367 extern FLAC_API const unsigned FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK; 
00368 extern FLAC_API const unsigned FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK; 
00369 extern FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK; 
00371 /*****************************************************************************/
00372 
00373 
00374 /*****************************************************************************
00375  *
00376  * Frame structures
00377  *
00378  *****************************************************************************/
00379 
00381 typedef enum {
00382     FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT = 0, 
00383     FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE = 1, 
00384     FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE = 2, 
00385     FLAC__CHANNEL_ASSIGNMENT_MID_SIDE = 3 
00386 } FLAC__ChannelAssignment;
00387 
00393 extern FLAC_API const char * const FLAC__ChannelAssignmentString[];
00394 
00396 typedef enum {
00397     FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER, 
00398     FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER 
00399 } FLAC__FrameNumberType;
00400 
00406 extern FLAC_API const char * const FLAC__FrameNumberTypeString[];
00407 
00408 
00411 typedef struct {
00412     unsigned blocksize;
00415     unsigned sample_rate;
00418     unsigned channels;
00421     FLAC__ChannelAssignment channel_assignment;
00424     unsigned bits_per_sample;
00427     FLAC__FrameNumberType number_type;
00432     union {
00433         FLAC__uint32 frame_number;
00434         FLAC__uint64 sample_number;
00435     } number;
00439     FLAC__uint8 crc;
00444 } FLAC__FrameHeader;
00445 
00446 extern FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC; 
00447 extern FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC_LEN; 
00448 extern FLAC_API const unsigned FLAC__FRAME_HEADER_RESERVED_LEN; 
00449 extern FLAC_API const unsigned FLAC__FRAME_HEADER_BLOCKING_STRATEGY_LEN; 
00450 extern FLAC_API const unsigned FLAC__FRAME_HEADER_BLOCK_SIZE_LEN; 
00451 extern FLAC_API const unsigned FLAC__FRAME_HEADER_SAMPLE_RATE_LEN; 
00452 extern FLAC_API const unsigned FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN; 
00453 extern FLAC_API const unsigned FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN; 
00454 extern FLAC_API const unsigned FLAC__FRAME_HEADER_ZERO_PAD_LEN; 
00455 extern FLAC_API const unsigned FLAC__FRAME_HEADER_CRC_LEN; 
00460 typedef struct {
00461     FLAC__uint16 crc;
00466 } FLAC__FrameFooter;
00467 
00468 extern FLAC_API const unsigned FLAC__FRAME_FOOTER_CRC_LEN; 
00473 typedef struct {
00474     FLAC__FrameHeader header;
00475     FLAC__Subframe subframes[FLAC__MAX_CHANNELS];
00476     FLAC__FrameFooter footer;
00477 } FLAC__Frame;
00478 
00479 /*****************************************************************************/
00480 
00481 
00482 /*****************************************************************************
00483  *
00484  * Meta-data structures
00485  *
00486  *****************************************************************************/
00487 
00489 typedef enum {
00490 
00491     FLAC__METADATA_TYPE_STREAMINFO = 0,
00494     FLAC__METADATA_TYPE_PADDING = 1,
00497     FLAC__METADATA_TYPE_APPLICATION = 2,
00500     FLAC__METADATA_TYPE_SEEKTABLE = 3,
00503     FLAC__METADATA_TYPE_VORBIS_COMMENT = 4,
00506     FLAC__METADATA_TYPE_CUESHEET = 5,
00509     FLAC__METADATA_TYPE_PICTURE = 6,
00512     FLAC__METADATA_TYPE_UNDEFINED = 7,
00515         FLAC__MAX_METADATA_TYPE = FLAC__MAX_METADATA_TYPE_CODE,
00517 } FLAC__MetadataType;
00518 
00524 extern FLAC_API const char * const FLAC__MetadataTypeString[];
00525 
00526 
00529 typedef struct {
00530     unsigned min_blocksize, max_blocksize;
00531     unsigned min_framesize, max_framesize;
00532     unsigned sample_rate;
00533     unsigned channels;
00534     unsigned bits_per_sample;
00535     FLAC__uint64 total_samples;
00536     FLAC__byte md5sum[16];
00537 } FLAC__StreamMetadata_StreamInfo;
00538 
00539 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN; 
00540 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN; 
00541 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN; 
00542 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN; 
00543 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN; 
00544 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN; 
00545 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN; 
00546 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN; 
00547 extern FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MD5SUM_LEN; 
00550 #define FLAC__STREAM_METADATA_STREAMINFO_LENGTH (34u)
00551 
00554 typedef struct {
00555     int dummy;
00560 } FLAC__StreamMetadata_Padding;
00561 
00562 
00565 typedef struct {
00566     FLAC__byte id[4];
00567     FLAC__byte *data;
00568 } FLAC__StreamMetadata_Application;
00569 
00570 extern FLAC_API const unsigned FLAC__STREAM_METADATA_APPLICATION_ID_LEN; 
00574 typedef struct {
00575     FLAC__uint64 sample_number;
00578     FLAC__uint64 stream_offset;
00582     unsigned frame_samples;
00584 } FLAC__StreamMetadata_SeekPoint;
00585 
00586 extern FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN; 
00587 extern FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN; 
00588 extern FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN; 
00591 #define FLAC__STREAM_METADATA_SEEKPOINT_LENGTH (18u)
00592 
00597 extern FLAC_API const FLAC__uint64 FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
00598 
00599 
00612 typedef struct {
00613     unsigned num_points;
00614     FLAC__StreamMetadata_SeekPoint *points;
00615 } FLAC__StreamMetadata_SeekTable;
00616 
00617 
00624 typedef struct {
00625     FLAC__uint32 length;
00626     FLAC__byte *entry;
00627 } FLAC__StreamMetadata_VorbisComment_Entry;
00628 
00629 extern FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN; 
00634 typedef struct {
00635     FLAC__StreamMetadata_VorbisComment_Entry vendor_string;
00636     FLAC__uint32 num_comments;
00637     FLAC__StreamMetadata_VorbisComment_Entry *comments;
00638 } FLAC__StreamMetadata_VorbisComment;
00639 
00640 extern FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN; 
00647 typedef struct {
00648     FLAC__uint64 offset;
00653     FLAC__byte number;
00655 } FLAC__StreamMetadata_CueSheet_Index;
00656 
00657 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN; 
00658 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN; 
00659 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN; 
00666 typedef struct {
00667     FLAC__uint64 offset;
00670     FLAC__byte number;
00673     char isrc[13];
00676     unsigned type:1;
00679     unsigned pre_emphasis:1;
00682     FLAC__byte num_indices;
00685     FLAC__StreamMetadata_CueSheet_Index *indices;
00688 } FLAC__StreamMetadata_CueSheet_Track;
00689 
00690 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN; 
00691 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN; 
00692 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN; 
00693 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN; 
00694 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN; 
00695 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN; 
00696 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN; 
00703 typedef struct {
00704     char media_catalog_number[129];
00710     FLAC__uint64 lead_in;
00713     FLAC__bool is_cd;
00716     unsigned num_tracks;
00719     FLAC__StreamMetadata_CueSheet_Track *tracks;
00722 } FLAC__StreamMetadata_CueSheet;
00723 
00724 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN; 
00725 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN; 
00726 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN; 
00727 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN; 
00728 extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN; 
00732 typedef enum {
00733     FLAC__STREAM_METADATA_PICTURE_TYPE_OTHER = 0, 
00734     FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD = 1, 
00735     FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON = 2, 
00736     FLAC__STREAM_METADATA_PICTURE_TYPE_FRONT_COVER = 3, 
00737     FLAC__STREAM_METADATA_PICTURE_TYPE_BACK_COVER = 4, 
00738     FLAC__STREAM_METADATA_PICTURE_TYPE_LEAFLET_PAGE = 5, 
00739     FLAC__STREAM_METADATA_PICTURE_TYPE_MEDIA = 6, 
00740     FLAC__STREAM_METADATA_PICTURE_TYPE_LEAD_ARTIST = 7, 
00741     FLAC__STREAM_METADATA_PICTURE_TYPE_ARTIST = 8, 
00742     FLAC__STREAM_METADATA_PICTURE_TYPE_CONDUCTOR = 9, 
00743     FLAC__STREAM_METADATA_PICTURE_TYPE_BAND = 10, 
00744     FLAC__STREAM_METADATA_PICTURE_TYPE_COMPOSER = 11, 
00745     FLAC__STREAM_METADATA_PICTURE_TYPE_LYRICIST = 12, 
00746     FLAC__STREAM_METADATA_PICTURE_TYPE_RECORDING_LOCATION = 13, 
00747     FLAC__STREAM_METADATA_PICTURE_TYPE_DURING_RECORDING = 14, 
00748     FLAC__STREAM_METADATA_PICTURE_TYPE_DURING_PERFORMANCE = 15, 
00749     FLAC__STREAM_METADATA_PICTURE_TYPE_VIDEO_SCREEN_CAPTURE = 16, 
00750     FLAC__STREAM_METADATA_PICTURE_TYPE_FISH = 17, 
00751     FLAC__STREAM_METADATA_PICTURE_TYPE_ILLUSTRATION = 18, 
00752     FLAC__STREAM_METADATA_PICTURE_TYPE_BAND_LOGOTYPE = 19, 
00753     FLAC__STREAM_METADATA_PICTURE_TYPE_PUBLISHER_LOGOTYPE = 20, 
00754     FLAC__STREAM_METADATA_PICTURE_TYPE_UNDEFINED
00755 } FLAC__StreamMetadata_Picture_Type;
00756 
00763 extern FLAC_API const char * const FLAC__StreamMetadata_Picture_TypeString[];
00764 
00769 typedef struct {
00770     FLAC__StreamMetadata_Picture_Type type;
00773     char *mime_type;
00784     FLAC__byte *description;
00791     FLAC__uint32 width;
00794     FLAC__uint32 height;
00797     FLAC__uint32 depth;
00800     FLAC__uint32 colors;
00805     FLAC__uint32 data_length;
00808     FLAC__byte *data;
00811 } FLAC__StreamMetadata_Picture;
00812 
00813 extern FLAC_API const unsigned FLAC__STREAM_METADATA_PICTURE_TYPE_LEN; 
00814 extern FLAC_API const unsigned FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN; 
00815 extern FLAC_API const unsigned FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN; 
00816 extern FLAC_API const unsigned FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN; 
00817 extern FLAC_API const unsigned FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN; 
00818 extern FLAC_API const unsigned FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN; 
00819 extern FLAC_API const unsigned FLAC__STREAM_METADATA_PICTURE_COLORS_LEN; 
00820 extern FLAC_API const unsigned FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN; 
00827 typedef struct {
00828     FLAC__byte *data;
00829 } FLAC__StreamMetadata_Unknown;
00830 
00831 
00834 typedef struct {
00835     FLAC__MetadataType type;
00840     FLAC__bool is_last;
00843     unsigned length;
00846     union {
00847         FLAC__StreamMetadata_StreamInfo stream_info;
00848         FLAC__StreamMetadata_Padding padding;
00849         FLAC__StreamMetadata_Application application;
00850         FLAC__StreamMetadata_SeekTable seek_table;
00851         FLAC__StreamMetadata_VorbisComment vorbis_comment;
00852         FLAC__StreamMetadata_CueSheet cue_sheet;
00853         FLAC__StreamMetadata_Picture picture;
00854         FLAC__StreamMetadata_Unknown unknown;
00855     } data;
00858 } FLAC__StreamMetadata;
00859 
00860 extern FLAC_API const unsigned FLAC__STREAM_METADATA_IS_LAST_LEN; 
00861 extern FLAC_API const unsigned FLAC__STREAM_METADATA_TYPE_LEN; 
00862 extern FLAC_API const unsigned FLAC__STREAM_METADATA_LENGTH_LEN; 
00865 #define FLAC__STREAM_METADATA_HEADER_LENGTH (4u)
00866 
00867 /*****************************************************************************/
00868 
00869 
00870 /*****************************************************************************
00871  *
00872  * Utility functions
00873  *
00874  *****************************************************************************/
00875 
00883 FLAC_API FLAC__bool FLAC__format_sample_rate_is_valid(unsigned sample_rate);
00884 
00895 FLAC_API FLAC__bool FLAC__format_blocksize_is_subset(unsigned blocksize, unsigned sample_rate);
00896 
00906 FLAC_API FLAC__bool FLAC__format_sample_rate_is_subset(unsigned sample_rate);
00907 
00920 FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_name_is_legal(const char *name);
00921 
00936 FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_value_is_legal(const FLAC__byte *value, unsigned length);
00937 
00953 FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_is_legal(const FLAC__byte *entry, unsigned length);
00954 
00965 FLAC_API FLAC__bool FLAC__format_seektable_is_legal(const FLAC__StreamMetadata_SeekTable *seek_table);
00966 
00979 FLAC_API unsigned FLAC__format_seektable_sort(FLAC__StreamMetadata_SeekTable *seek_table);
00980 
00999 FLAC_API FLAC__bool FLAC__format_cuesheet_is_legal(const FLAC__StreamMetadata_CueSheet *cue_sheet, FLAC__bool check_cd_da_subset, const char **violation);
01000 
01017 FLAC_API FLAC__bool FLAC__format_picture_is_legal(const FLAC__StreamMetadata_Picture *picture, const char **violation);
01018 
01019 /* \} */
01020 
01021 #ifdef __cplusplus
01022 }
01023 #endif
01024 
01025 #endif