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miniflac.h
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miniflac.h
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/* SPDX-License-Identifier: 0BSD
Copyright (C) 2022 John Regan <[email protected]>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef MINIFLAC_H
#define MINIFLAC_H
/*
Building
========
In one C file, define MINIFLAC_IMPLEMENTATION before including this header, like:
#define MINIFLAC_IMPLEMENTATION
#include "miniflac.h"
Usage
=====
You'll want to allocate a decoder, initialize it with miniflac_init, then start
pushing data into it with functions like miniflac_sync or miniflac_decode.
All the "feeding" functions take the same first 4 parameters:
1. miniflac* pFlac - a pointer to a miniflac struct.
2. const uint8_t* data - a pointer to a stream of bytes to push.
3. uint32_t length - the length of your stream of bytes.
4. uint32_t* out_length - an out-variable, it will be updated with the
number of bytes consumed.
You'll to save any un-consumed bytes for your next call.
All the "feeding" / public functions return a MINIFLAC_RESULT enum, these are the
important values:
< 0 : error
0 : more data is required (MINIFLAC_CONTINUE)
1 : success (MINIFLAC_OK)
You can use miniflac_sync to sync to a block boundary. It will automatically parse
a metadata block header or frame header, so you can inspect it and check on things
like the block size, bits-per-sample, etc. See the various struct definitions down
below. The example program in "examples/basic-decoder.c" does this. Keep calling
it until you get something other than MINIFLAC_CONTINUE (0). MINIFLAC_OK (1) means
you've found a block boundary. Anything < 0 is an error.
You can look at the .state field in the miniflac struct to see if you're in a
metadata block or audio frame, and proceed accordingly.
Decoding audio is done with miniflac_decode. You don't *have* to use miniflac_sync first,
you could just call miniflac_decode (this is done in the example program
"examples/single-byte-decoder.c"). The advantage of miniflac_sync is you can
look at the frame properties in the header before you start decoding.
miniflac_decode behaves similarly to miniflac_sync - when it returns MINIFLAC_OK (1),
your output buffer will have decoded audio samples in it. You'll be at the end
of the audio frame, so you can either call miniflac_sync to check the header of the next
frame, or call miniflac_decode to continue on.
*/
#include <stdint.h>
#include <stddef.h>
#include <assert.h>
#if !defined(MINIFLAC_API)
#ifdef MINIFLAC_DLL
#ifdef _WIN32
#define MINIFLAC_DLL_IMPORT __declspec(dllimport)
#define MINIFLAC_DLL_EXPORT __declspec(dllexport)
#define MINIFLAC_DLL_PRIVATE static
#else
#if defined(__GNUC__) && __GNUC__ >= 4
#define MINIFLAC_DLL_IMPORT __attribute__((visibility("default")))
#define MINIFLAC_DLL_EXPORT __attribute__((visibility("default")))
#define MINIFLAC_DLL_PRIVATE __attribute__((visibility("hidden")))
#else
#define MINIFLAC_DLL_IMPORT
#define MINIFLAC_DLL_EXPORT
#define MINIFLAC_DLL_PRIVATE static
#endif
#endif
#ifdef MINIFLAC_IMPLEMENTATION
#define MINIFLAC_API MINIFLAC_DLL_EXPORT
#else
#define MINIFLAC_API MINIFLAC_DLL_IMPORT
#endif
#define MINIFLAC_PRIVATE MINIFLAC_DLL_PRIVATE
#else
#define MINIFLAC_API extern
#define MINIFLAC_PRIVATE static
#endif
#endif
#if defined(__GNUC__) && __GNUC__ > 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5)
#define MINIFLAC_CONST __attribute__((__const__))
#endif
#define MINIFLAC_APPLICATION_H
#define MINIFLAC_COMMON_H
#define MINIFLAC_BITREADER_H
#define MINIFLAC_CUESHEET_H
#define MINIFLAC_FRAME_H
#define MINIFLAC_FRAMEHEADER_H
#define MINIFLAC_METADATA_H
#define MINIFLAC_METADATA_HEADER_H
#define MINIFLAC_OGG_H
#define MINIFLAC_OGGHEADER_H
#define MINIFLAC_PADDING_H
#define MINIFLAC_PICTURE_H
#define MINIFLAC_RESIDUAL_H
#define MINIFLAC_SEEKTABLE_H
#define MINIFLAC_STREAMINFO_H
#define MINIFLAC_STREAMMARKER_H
#define MINIFLAC_SUBFRAME_CONSTANT_H
#define MINIFLAC_SUBFRAME_FIXED_H
#define MINIFLAC_SUBFRAME_H
#define MINIFLAC_SUBFRAME_HEADER_H
#define MINIFLAC_SUBFRAME_LPC_H
#define MINIFLAC_SUBFRAME_VERBATIM_H
#define MINIFLAC_UNPACK_H
#define MINIFLAC_VORBIS_COMMENT_H
#define MFLAC_H
#ifndef MINIFLAC_CONST
#define MINIFLAC_CONST
#endif
enum MINIFLAC_RESULT {
MINIFLAC_OGG_HEADER_NOTFLAC = -18, /* attempted to read an Ogg header packet that isn't a FLAC-in-Ogg packet */
MINIFLAC_SUBFRAME_RESERVED_TYPE = -17, /* subframe header specified a reserved type */
MINIFLAC_SUBFRAME_RESERVED_BIT = -16, /* subframe header found a non-zero value in the reserved bit */
MINIFLAC_STREAMMARKER_INVALID = -15, /* encountered an illegal value while parsing the fLaC stream marker */
MINIFLAC_RESERVED_CODING_METHOD = -14, /* a residual block used a reserved coding method */
MINIFLAC_METADATA_TYPE_RESERVED = -13, /* a metadata header used a reserved type */
MINIFLAC_METADATA_TYPE_INVALID = -12, /* a metadata header used a invalid type */
MINIFLAC_FRAME_RESERVED_SAMPLE_SIZE = -11, /* the frame header lists reserved sample size */
MINIFLAC_FRAME_RESERVED_CHANNEL_ASSIGNMENT = -10, /* the frame header lists reserved channel assignment */
MINIFLAC_FRAME_INVALID_SAMPLE_SIZE = -9, /* the frame header sample rate was invalid */
MINIFLAC_FRAME_INVALID_SAMPLE_RATE = -8, /* the frame header sample rate was invalid */
MINIFLAC_FRAME_RESERVED_BLOCKSIZE = -7, /* the frame header lists a reserved block size */
MINIFLAC_FRAME_RESERVED_BIT2 = -6, /* the second reserved bit was non-zero when parsing the frame header */
MINIFLAC_FRAME_RESERVED_BIT1 = -5, /* the first reserved bit was non-zero when parsing the frame header */
MINIFLAC_FRAME_SYNCCODE_INVALID = -4, /* error when parsing a header sync code */
MINIFLAC_FRAME_CRC16_INVALID = -3, /* error in crc16 while decoding frame footer */
MINIFLAC_FRAME_CRC8_INVALID = -2, /* error in crc8 while decoding frame header */
MINIFLAC_ERROR = -1, /* generic error, likely in an invalid state */
MINIFLAC_CONTINUE = 0, /* needs more data, otherwise fine */
MINIFLAC_OK = 1, /* generic "OK" */
MINIFLAC_METADATA_END = 2, /* used to signify end-of-data in a metadata block */
};
enum MINIFLAC_OGGHEADER_STATE {
MINIFLAC_OGGHEADER_PACKETTYPE,
MINIFLAC_OGGHEADER_F,
MINIFLAC_OGGHEADER_L,
MINIFLAC_OGGHEADER_A,
MINIFLAC_OGGHEADER_C,
MINIFLAC_OGGHEADER_MAJOR,
MINIFLAC_OGGHEADER_MINOR,
MINIFLAC_OGGHEADER_HEADERPACKETS,
};
enum MINIFLAC_OGG_STATE {
MINIFLAC_OGG_CAPTUREPATTERN_O,
MINIFLAC_OGG_CAPTUREPATTERN_G1,
MINIFLAC_OGG_CAPTUREPATTERN_G2,
MINIFLAC_OGG_CAPTUREPATTERN_S,
MINIFLAC_OGG_VERSION,
MINIFLAC_OGG_HEADERTYPE,
MINIFLAC_OGG_GRANULEPOS,
MINIFLAC_OGG_SERIALNO,
MINIFLAC_OGG_PAGENO,
MINIFLAC_OGG_CHECKSUM,
MINIFLAC_OGG_PAGESEGMENTS,
MINIFLAC_OGG_SEGMENTTABLE,
MINIFLAC_OGG_DATA,
MINIFLAC_OGG_SKIP,
};
enum MINIFLAC_STREAMMARKER_STATE {
MINIFLAC_STREAMMARKER_F,
MINIFLAC_STREAMMARKER_L,
MINIFLAC_STREAMMARKER_A,
MINIFLAC_STREAMMARKER_C,
};
enum MINIFLAC_METADATA_TYPE {
MINIFLAC_METADATA_STREAMINFO = 0,
MINIFLAC_METADATA_PADDING = 1,
MINIFLAC_METADATA_APPLICATION = 2,
MINIFLAC_METADATA_SEEKTABLE = 3,
MINIFLAC_METADATA_VORBIS_COMMENT = 4,
MINIFLAC_METADATA_CUESHEET = 5,
MINIFLAC_METADATA_PICTURE = 6,
MINIFLAC_METADATA_INVALID = 127,
MINIFLAC_METADATA_UNKNOWN = 128,
};
enum MINIFLAC_METADATA_HEADER_STATE {
MINIFLAC_METADATA_LAST_FLAG,
MINIFLAC_METADATA_BLOCK_TYPE,
MINIFLAC_METADATA_LENGTH,
};
enum MINIFLAC_STREAMINFO_STATE {
MINIFLAC_STREAMINFO_MINBLOCKSIZE,
MINIFLAC_STREAMINFO_MAXBLOCKSIZE,
MINIFLAC_STREAMINFO_MINFRAMESIZE,
MINIFLAC_STREAMINFO_MAXFRAMESIZE,
MINIFLAC_STREAMINFO_SAMPLERATE,
MINIFLAC_STREAMINFO_CHANNELS,
MINIFLAC_STREAMINFO_BPS,
MINIFLAC_STREAMINFO_TOTALSAMPLES,
MINIFLAC_STREAMINFO_MD5,
};
enum MINIFLAC_VORBISCOMMENT_STATE {
MINIFLAC_VORBISCOMMENT_VENDOR_LENGTH,
MINIFLAC_VORBISCOMMENT_VENDOR_STRING,
MINIFLAC_VORBISCOMMENT_TOTAL_COMMENTS,
MINIFLAC_VORBISCOMMENT_COMMENT_LENGTH,
MINIFLAC_VORBISCOMMENT_COMMENT_STRING,
};
enum MINIFLAC_PICTURE_STATE {
MINIFLAC_PICTURE_TYPE,
MINIFLAC_PICTURE_MIME_LENGTH,
MINIFLAC_PICTURE_MIME_STRING,
MINIFLAC_PICTURE_DESCRIPTION_LENGTH,
MINIFLAC_PICTURE_DESCRIPTION_STRING,
MINIFLAC_PICTURE_WIDTH,
MINIFLAC_PICTURE_HEIGHT,
MINIFLAC_PICTURE_COLORDEPTH,
MINIFLAC_PICTURE_TOTALCOLORS,
MINIFLAC_PICTURE_PICTURE_LENGTH,
MINIFLAC_PICTURE_PICTURE_DATA,
};
enum MINIFLAC_CUESHEET_STATE {
MINIFLAC_CUESHEET_CATALOG,
MINIFLAC_CUESHEET_LEADIN,
MINIFLAC_CUESHEET_CDFLAG,
MINIFLAC_CUESHEET_SHEET_RESERVE,
MINIFLAC_CUESHEET_TRACKS,
MINIFLAC_CUESHEET_TRACKOFFSET,
MINIFLAC_CUESHEET_TRACKNUMBER,
MINIFLAC_CUESHEET_TRACKISRC,
MINIFLAC_CUESHEET_TRACKTYPE,
MINIFLAC_CUESHEET_TRACKPREEMPH,
MINIFLAC_CUESHEET_TRACK_RESERVE,
MINIFLAC_CUESHEET_TRACKPOINTS,
MINIFLAC_CUESHEET_INDEX_OFFSET,
MINIFLAC_CUESHEET_INDEX_NUMBER,
MINIFLAC_CUESHEET_INDEX_RESERVE,
};
enum MINIFLAC_SEEKTABLE_STATE {
MINIFLAC_SEEKTABLE_SAMPLE_NUMBER,
MINIFLAC_SEEKTABLE_SAMPLE_OFFSET,
MINIFLAC_SEEKTABLE_SAMPLES,
};
enum MINIFLAC_APPLICATION_STATE {
MINIFLAC_APPLICATION_ID,
MINIFLAC_APPLICATION_DATA,
};
enum MINIFLAC_METADATA_STATE {
MINIFLAC_METADATA_HEADER,
MINIFLAC_METADATA_DATA,
};
enum MINIFLAC_RESIDUAL_STATE {
MINIFLAC_RESIDUAL_CODING_METHOD,
MINIFLAC_RESIDUAL_PARTITION_ORDER,
MINIFLAC_RESIDUAL_RICE_PARAMETER,
MINIFLAC_RESIDUAL_RICE_SIZE, /* used when rice_parameter is an escape code */
MINIFLAC_RESIDUAL_RICE_VALUE, /* used when rice_parameter is an escape code */
MINIFLAC_RESIDUAL_MSB, /* used when reading MSB bits */
MINIFLAC_RESIDUAL_LSB, /* used when reading MSB bits */
};
enum MINIFLAC_SUBFRAME_FIXED_STATE {
MINIFLAC_SUBFRAME_FIXED_DECODE,
};
enum MINIFLAC_SUBFRAME_LPC_STATE {
MINIFLAC_SUBFRAME_LPC_PRECISION,
MINIFLAC_SUBFRAME_LPC_SHIFT,
MINIFLAC_SUBFRAME_LPC_COEFF,
};
enum MINIFLAC_SUBFRAME_CONSTANT_STATE {
MINIFLAC_SUBFRAME_CONSTANT_DECODE,
};
enum MINIFLAC_SUBFRAME_VERBATIM_STATE {
MINIFLAC_SUBFRAME_VERBATIM_DECODE,
};
enum MINIFLAC_SUBFRAME_TYPE {
MINIFLAC_SUBFRAME_TYPE_UNKNOWN,
MINIFLAC_SUBFRAME_TYPE_CONSTANT,
MINIFLAC_SUBFRAME_TYPE_FIXED,
MINIFLAC_SUBFRAME_TYPE_LPC,
MINIFLAC_SUBFRAME_TYPE_VERBATIM,
};
enum MINIFLAC_SUBFRAME_HEADER_STATE {
MINIFLAC_SUBFRAME_HEADER_RESERVEBIT1,
MINIFLAC_SUBFRAME_HEADER_KIND,
MINIFLAC_SUBFRAME_HEADER_WASTED_BITS,
MINIFLAC_SUBFRAME_HEADER_UNARY,
};
enum MINIFLAC_SUBFRAME_STATE {
MINIFLAC_SUBFRAME_HEADER,
MINIFLAC_SUBFRAME_CONSTANT,
MINIFLAC_SUBFRAME_VERBATIM,
MINIFLAC_SUBFRAME_FIXED,
MINIFLAC_SUBFRAME_LPC,
};
enum MINIFLAC_CHASSGN {
MINIFLAC_CHASSGN_NONE,
MINIFLAC_CHASSGN_LEFT_SIDE,
MINIFLAC_CHASSGN_RIGHT_SIDE,
MINIFLAC_CHASSGN_MID_SIDE,
};
enum MINIFLAC_FRAME_HEADER_STATE {
MINIFLAC_FRAME_HEADER_SYNC,
MINIFLAC_FRAME_HEADER_RESERVEBIT_1,
MINIFLAC_FRAME_HEADER_BLOCKINGSTRATEGY,
MINIFLAC_FRAME_HEADER_BLOCKSIZE,
MINIFLAC_FRAME_HEADER_SAMPLERATE,
MINIFLAC_FRAME_HEADER_CHANNELASSIGNMENT,
MINIFLAC_FRAME_HEADER_SAMPLESIZE,
MINIFLAC_FRAME_HEADER_RESERVEBIT_2,
MINIFLAC_FRAME_HEADER_SAMPLENUMBER_1,
MINIFLAC_FRAME_HEADER_SAMPLENUMBER_2,
MINIFLAC_FRAME_HEADER_SAMPLENUMBER_3,
MINIFLAC_FRAME_HEADER_SAMPLENUMBER_4,
MINIFLAC_FRAME_HEADER_SAMPLENUMBER_5,
MINIFLAC_FRAME_HEADER_SAMPLENUMBER_6,
MINIFLAC_FRAME_HEADER_SAMPLENUMBER_7,
MINIFLAC_FRAME_HEADER_BLOCKSIZE_MAYBE,
MINIFLAC_FRAME_HEADER_SAMPLERATE_MAYBE,
MINIFLAC_FRAME_HEADER_CRC8,
};
enum MINIFLAC_FRAME_STATE {
MINIFLAC_FRAME_HEADER,
MINIFLAC_FRAME_SUBFRAME,
MINIFLAC_FRAME_FOOTER,
};
enum MINIFLAC_STATE {
MINIFLAC_OGGHEADER, /* will try to find an ogg header */
MINIFLAC_STREAMMARKER_OR_FRAME, /* poke for a stream marker or audio frame
*/
MINIFLAC_STREAMMARKER, /* reading a stream marker */
MINIFLAC_METADATA_OR_FRAME, /* will try to find a frame sync code or try to parse a metadata block */
MINIFLAC_METADATA, /* currently reading a metadata block */
MINIFLAC_FRAME, /* currently reading an audio frame */
};
enum MINIFLAC_CONTAINER {
MINIFLAC_CONTAINER_UNKNOWN,
MINIFLAC_CONTAINER_NATIVE,
MINIFLAC_CONTAINER_OGG,
};
enum MFLAC_RESULT {
MFLAC_EOF = 0,
MFLAC_OK = 1,
MFLAC_METADATA_END = 2,
};
typedef size_t (*mflac_readcb)(uint8_t* buffer, size_t bytes, void* userdata);
struct miniflac_bitreader_s {
uint64_t val;
uint8_t bits;
uint8_t crc8;
uint16_t crc16;
uint32_t pos;
uint32_t len;
const uint8_t* buffer;
uint32_t tot; /* total bytes read since last reset */
};
struct miniflac_oggheader_s {
enum MINIFLAC_OGGHEADER_STATE state;
};
struct miniflac_ogg_s {
enum MINIFLAC_OGG_STATE state;
struct miniflac_bitreader_s br; /* maintain our own bitreader */
uint8_t version;
uint8_t headertype;
int64_t granulepos;
int32_t serialno;
uint32_t pageno;
uint8_t segments;
uint8_t curseg; /* current position within the segment table */
uint16_t length; /* length of data within page */
uint16_t pos; /* where we are within page */
};
struct miniflac_streammarker_s {
enum MINIFLAC_STREAMMARKER_STATE state;
};
struct miniflac_metadata_header_s {
enum MINIFLAC_METADATA_HEADER_STATE state;
uint8_t is_last;
uint8_t type_raw;
enum MINIFLAC_METADATA_TYPE type;
uint32_t length;
};
struct miniflac_streaminfo_s {
enum MINIFLAC_STREAMINFO_STATE state;
uint8_t pos;
uint32_t sample_rate;
uint8_t bps;
};
struct miniflac_vorbis_comment_s {
enum MINIFLAC_VORBISCOMMENT_STATE state;
uint32_t len; /* length of the current string we're decoding */
uint32_t pos; /* position within current string */
uint32_t tot; /* total comments */
uint32_t cur; /* current comment being decoded */
};
struct miniflac_picture_s {
enum MINIFLAC_PICTURE_STATE state;
uint32_t len; /* length of the current string/data we're decoding */
uint32_t pos; /* position within current string */
};
struct miniflac_cuesheet_s {
enum MINIFLAC_CUESHEET_STATE state;
uint32_t pos;
uint8_t track;
uint8_t tracks;
uint8_t point;
uint8_t points;
};
struct miniflac_seektable_s {
enum MINIFLAC_SEEKTABLE_STATE state;
uint32_t len; /* number of seekpoints */
uint32_t pos; /* current seekpoint */
};
struct miniflac_application_s {
enum MINIFLAC_APPLICATION_STATE state;
uint32_t len; /* length of data */
uint32_t pos; /* current byte */
};
struct miniflac_padding_s {
uint32_t len; /* length of data */
uint32_t pos; /* current byte */
};
struct miniflac_metadata_s {
enum MINIFLAC_METADATA_STATE state;
uint32_t pos;
struct miniflac_metadata_header_s header;
struct miniflac_streaminfo_s streaminfo;
struct miniflac_vorbis_comment_s vorbis_comment;
struct miniflac_picture_s picture;
struct miniflac_cuesheet_s cuesheet;
struct miniflac_seektable_s seektable;
struct miniflac_application_s application;
struct miniflac_padding_s padding;
};
struct miniflac_residual_s {
enum MINIFLAC_RESIDUAL_STATE state;
uint8_t coding_method;
uint8_t partition_order;
uint8_t rice_parameter;
uint8_t rice_size;
uint32_t msb; /* unsure what the max for this is */
uint8_t rice_parameter_size; /* 4 or 5 based on coding method */
int32_t value; /* current residual value */
uint32_t partition; /* current partition */
uint32_t partition_total; /* total partitions */
uint32_t residual; /* current residual within partition */
uint32_t residual_total; /* total residuals in partition */
};
struct miniflac_subframe_fixed_s {
enum MINIFLAC_SUBFRAME_FIXED_STATE state;
uint32_t pos;
};
struct miniflac_subframe_lpc_s {
enum MINIFLAC_SUBFRAME_LPC_STATE state;
uint32_t pos;
uint8_t precision;
uint8_t shift;
uint8_t coeff;
int32_t coefficients[32];
};
struct miniflac_subframe_constant_s {
enum MINIFLAC_SUBFRAME_CONSTANT_STATE state;
};
struct miniflac_subframe_verbatim_s {
enum MINIFLAC_SUBFRAME_VERBATIM_STATE state;
uint32_t pos;
};
struct miniflac_subframe_header_s {
enum MINIFLAC_SUBFRAME_HEADER_STATE state;
enum MINIFLAC_SUBFRAME_TYPE type;
uint8_t order;
uint8_t wasted_bits;
uint8_t type_raw;
};
struct miniflac_subframe_s {
enum MINIFLAC_SUBFRAME_STATE state;
uint8_t bps; /* effective bps for this subframe */
struct miniflac_subframe_header_s header;
struct miniflac_subframe_constant_s constant;
struct miniflac_subframe_verbatim_s verbatim;
struct miniflac_subframe_fixed_s fixed;
struct miniflac_subframe_lpc_s lpc;
struct miniflac_residual_s residual;
};
struct miniflac_frame_header_s {
uint8_t block_size_raw; /* block size value direct from header */
uint8_t sample_rate_raw; /* sample rate value direct from header */
uint8_t channel_assignment_raw; /* channel assignment value direct from header */
uint8_t blocking_strategy;
uint16_t block_size; /* calculated/parsed block size */
uint32_t sample_rate; /* calculated/parsed sample rate */
enum MINIFLAC_CHASSGN channel_assignment;
uint8_t channels;
uint8_t bps;
union {
uint64_t sample_number;
uint32_t frame_number;
};
uint8_t crc8;
enum MINIFLAC_FRAME_HEADER_STATE state;
};
struct miniflac_frame_s {
enum MINIFLAC_FRAME_STATE state;
uint8_t cur_subframe;
uint16_t crc16;
size_t size; /* size of the frame, in bytes, only valid after decode */
struct miniflac_frame_header_s header;
struct miniflac_subframe_s subframe;
};
struct miniflac_s {
enum MINIFLAC_STATE state;
enum MINIFLAC_CONTAINER container;
struct miniflac_bitreader_s br;
struct miniflac_ogg_s ogg;
struct miniflac_oggheader_s oggheader;
struct miniflac_streammarker_s streammarker;
struct miniflac_metadata_s metadata;
struct miniflac_frame_s frame;
int32_t oggserial;
uint8_t oggserial_set;
};
struct mflac_s {
struct miniflac_s flac;
mflac_readcb read;
void* userdata;
size_t bufpos;
size_t buflen;
#ifndef MFLAC_BUFFER_SIZE
#define MFLAC_BUFFER_SIZE 16384
#endif
uint8_t buffer[MFLAC_BUFFER_SIZE];
};
typedef struct miniflac_bitreader_s miniflac_bitreader_t;
typedef struct miniflac_oggheader_s miniflac_oggheader_t;
typedef struct miniflac_ogg_s miniflac_ogg_t;
typedef struct miniflac_streammarker_s miniflac_streammarker_t;
typedef struct miniflac_metadata_header_s miniflac_metadata_header_t;
typedef struct miniflac_streaminfo_s miniflac_streaminfo_t;
typedef struct miniflac_vorbis_comment_s miniflac_vorbis_comment_t;
typedef struct miniflac_picture_s miniflac_picture_t;
typedef struct miniflac_cuesheet_s miniflac_cuesheet_t;
typedef struct miniflac_seektable_s miniflac_seektable_t;
typedef struct miniflac_application_s miniflac_application_t;
typedef struct miniflac_padding_s miniflac_padding_t;
typedef struct miniflac_metadata_s miniflac_metadata_t;
typedef struct miniflac_residual_s miniflac_residual_t;
typedef struct miniflac_subframe_fixed_s miniflac_subframe_fixed_t;
typedef struct miniflac_subframe_lpc_s miniflac_subframe_lpc_t;
typedef struct miniflac_subframe_constant_s miniflac_subframe_constant_t;
typedef struct miniflac_subframe_verbatim_s miniflac_subframe_verbatim_t;
typedef struct miniflac_subframe_header_s miniflac_subframe_header_t;
typedef struct miniflac_subframe_s miniflac_subframe_t;
typedef struct miniflac_frame_header_s miniflac_frame_header_t;
typedef struct miniflac_frame_s miniflac_frame_t;
typedef struct miniflac_s miniflac_t;
typedef struct mflac_s mflac_t;
typedef enum MINIFLAC_RESULT MINIFLAC_RESULT;
typedef enum MINIFLAC_OGGHEADER_STATE MINIFLAC_OGGHEADER_STATE;
typedef enum MINIFLAC_OGG_STATE MINIFLAC_OGG_STATE;
typedef enum MINIFLAC_STREAMMARKER_STATE MINIFLAC_STREAMMARKER_STATE;
typedef enum MINIFLAC_METADATA_TYPE MINIFLAC_METADATA_TYPE;
typedef enum MINIFLAC_METADATA_HEADER_STATE MINIFLAC_METADATA_HEADER_STATE;
typedef enum MINIFLAC_STREAMINFO_STATE MINIFLAC_STREAMINFO_STATE;
typedef enum MINIFLAC_VORBISCOMMENT_STATE MINIFLAC_VORBISCOMMENT_STATE;
typedef enum MINIFLAC_PICTURE_STATE MINIFLAC_PICTURE_STATE;
typedef enum MINIFLAC_CUESHEET_STATE MINIFLAC_CUESHEET_STATE;
typedef enum MINIFLAC_SEEKTABLE_STATE MINIFLAC_SEEKTABLE_STATE;
typedef enum MINIFLAC_APPLICATION_STATE MINIFLAC_APPLICATION_STATE;
typedef enum MINIFLAC_METADATA_STATE MINIFLAC_METADATA_STATE;
typedef enum MINIFLAC_RESIDUAL_STATE MINIFLAC_RESIDUAL_STATE;
typedef enum MINIFLAC_SUBFRAME_FIXED_STATE MINIFLAC_SUBFRAME_FIXED_STATE;
typedef enum MINIFLAC_SUBFRAME_LPC_STATE MINIFLAC_SUBFRAME_LPC_STATE;
typedef enum MINIFLAC_SUBFRAME_CONSTANT_STATE MINIFLAC_SUBFRAME_CONSTANT_STATE;
typedef enum MINIFLAC_SUBFRAME_VERBATIM_STATE MINIFLAC_SUBFRAME_VERBATIM_STATE;
typedef enum MINIFLAC_SUBFRAME_TYPE MINIFLAC_SUBFRAME_TYPE;
typedef enum MINIFLAC_SUBFRAME_HEADER_STATE MINIFLAC_SUBFRAME_HEADER_STATE;
typedef enum MINIFLAC_SUBFRAME_STATE MINIFLAC_SUBFRAME_STATE;
typedef enum MINIFLAC_CHASSGN MINIFLAC_CHASSGN;
typedef enum MINIFLAC_FRAME_HEADER_STATE MINIFLAC_FRAME_HEADER_STATE;
typedef enum MINIFLAC_FRAME_STATE MINIFLAC_FRAME_STATE;
typedef enum MINIFLAC_STATE MINIFLAC_STATE;
typedef enum MINIFLAC_CONTAINER MINIFLAC_CONTAINER;
typedef enum MFLAC_RESULT MFLAC_RESULT;
#ifdef __cplusplus
extern "C" {
#endif
/* returns the number of bytes needed for the miniflac struct (for malloc, etc) */
MINIFLAC_API
MINIFLAC_CONST
size_t
miniflac_size(void);
/* give the container type if you know the kind of container,
* otherwise 0 for unknown */
MINIFLAC_API
void
miniflac_init(miniflac_t* pFlac, MINIFLAC_CONTAINER container);
/* sync to the next metadata block or frame, parses the metadata header or frame header */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_sync(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length);
/* decode a frame of audio, automatically skips metadata if needed */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_decode(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, int32_t** samples);
/* functions to query the state without inspecting structs,
* only valid to call after miniflac_sync returns MINIFLAC_OK */
MINIFLAC_API
uint8_t
miniflac_is_metadata(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_is_frame(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_metadata_is_last(miniflac_t* pFlac);
MINIFLAC_API
MINIFLAC_METADATA_TYPE
miniflac_metadata_type(miniflac_t* pFlac);
MINIFLAC_API
uint32_t
miniflac_metadata_length(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_metadata_is_streaminfo(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_metadata_is_padding(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_metadata_is_application(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_metadata_is_seektable(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_metadata_is_vorbis_comment(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_metadata_is_cuesheet(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_metadata_is_picture(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_frame_blocking_strategy(miniflac_t* pFlac);
MINIFLAC_API
uint16_t
miniflac_frame_block_size(miniflac_t* pFlac);
MINIFLAC_API
uint32_t
miniflac_frame_sample_rate(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_frame_channels(miniflac_t* pFlac);
MINIFLAC_API
uint8_t
miniflac_frame_bps(miniflac_t* pFlac);
MINIFLAC_API
uint64_t
miniflac_frame_sample_number(miniflac_t* pFlac);
MINIFLAC_API
uint32_t
miniflac_frame_frame_number(miniflac_t* pFlac);
/* get the minimum block size from a streaminfo block */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_min_block_size(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint16_t* min_block_size);
/* get the maximum block size */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_max_block_size(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint16_t* max_block_size);
/* get the minimum frame size */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_min_frame_size(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* min_frame_size);
/* get the maximum frame size */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_max_frame_size(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* max_frame_size);
/* get the sample rate */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_sample_rate(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* sample_rate);
/* get the channel count */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_channels(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* channels);
/* get the bits per second */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_bps(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* bps);
/* get the total samples */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_total_samples(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint64_t* total_samples);
/* get the md5 length (always 16) */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_md5_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* md5_length);
/* get the md5 string */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_streaminfo_md5_data(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* buffer, uint32_t buffer_length, uint32_t* buffer_used);
/* get the length of the vendor string, automatically skips metadata blocks, throws an error on audio frames */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_vorbis_comment_vendor_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* vendor_length);
/* get the vendor string, automatically skips metadata blocks, throws an error on audio frames */
/* will NOT be NULL-terminated! */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_vorbis_comment_vendor_string(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, char* buffer, uint32_t buffer_length, uint32_t* buffer_used);
/* get the total number of comments, automatically skips metadata blocks, throws an error on audio frames */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_vorbis_comment_total(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* total_comments);
/* get the next comment length, automatically skips metadata blocks, throws an error on audio frames */
/* returns MINIFLAC_METADATA_END when out of comments */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_vorbis_comment_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* comment_length);
/* get the next comment string, automatically skips metadata blocks, throws an error on audio frames */
/* will NOT be NULL-terminated! */
/* returns MINIFLAC_METADATA_END when out of comments */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_vorbis_comment_string(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, char* buffer, uint32_t buffer_length, uint32_t* buffer_used);
/* read a picture type */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_type(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* picture_type);
/* read a picture mime string length */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_mime_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* picture_mime_length);
/* read a picture mime string */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_mime_string(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, char* buffer, uint32_t buffer_length, uint32_t* buffer_used);
/* read a picture description string length */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_description_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* picture_description_length);
/* read a picture description string */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_description_string(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, char* buffer, uint32_t buffer_length, uint32_t* buffer_used);
/* read a picture width */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_width(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* picture_width);
/* read a picture height */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_height(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* picture_height);
/* read a picture colordepth */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_colordepth(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* picture_colordepth);
/* read a picture totalcolors */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_totalcolors(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* picture_totalcolors);
/* read a picture data length */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* picture_length);
/* read a picture data */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_picture_data(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* buffer, uint32_t buffer_length, uint32_t* buffer_used);
/* read a cuesheet catalog length (128 bytes) */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_catalog_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* catalog_length);
/* read a cuesheet catalog number */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_catalog_string(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, char* buffer, uint32_t buffer_length, uint32_t* outlen);
/* read a cuesheet leadin value */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_leadin(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint64_t* leadin);
/* read a cuesheet "is this a cd" flag */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_cd_flag(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* cd_flag);
/* read a cuesheet total tracks */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_tracks(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* tracks);
/* read the next track offset (can return MINIFLAC_METADATA_END) */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_track_offset(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint64_t* track_offset);
/* read the next track number */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_track_number(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* track_number);
/* read the next track isrc length */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_track_isrc_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* isrc_length);
/* read the next track isrc string */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_track_isrc_string(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, char* buffer, uint32_t buffer_length, uint32_t* outlen);
/* read the next track type flag (0 = audio, 1 = non-audio) */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_track_audio_flag(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* track_audio_flag);
/* read the track pre-emphasis flag */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_track_preemph_flag(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* track_preemph_flag);
/* read the total number of track index points */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_track_indexpoints(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* track_indexpoints);
/* read the next index point offset */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_index_point_offset(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint64_t* index_point_offset);
/* read the next index point number */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_cuesheet_index_point_number(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* index_point_number);
/* get the number of seekpoints */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_seektable_seekpoints(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* seekpoints);
/* read the next seekpoint sample number */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_seektable_sample_number(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint64_t* sample_number);
/* read the next seekpoint sample offset */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_seektable_sample_offset(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint64_t* sample_offset);
/* read the next seekpoint # of samples in seekpoint */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_seektable_samples(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint16_t* samples);
/* read an application block's ID */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_application_id(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* id);
/* read an application block's data length */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_application_length(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint32_t* application_length);
/* read an application block's data */
MINIFLAC_API
MINIFLAC_RESULT
miniflac_application_data(miniflac_t* pFlac, const uint8_t* data, uint32_t length, uint32_t* out_length, uint8_t* buffer, uint32_t buffer_length, uint32_t* outlen);