tak.h File Reference

TAK (Tom's lossless Audio Kompressor) decoder/demuxer common functions. More...

#include <stdint.h>
#include "get_bits.h"
#include "avcodec.h"

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Data Structures
struct	TAKStreamInfo

Macros
#define	BITSTREAM_READER_LE
#define	TAK_FORMAT_DATA_TYPE_BITS   3
#define	TAK_FORMAT_SAMPLE_RATE_BITS   18
#define	TAK_FORMAT_BPS_BITS   5
#define	TAK_FORMAT_CHANNEL_BITS   4
#define	TAK_FORMAT_VALID_BITS   5
#define	TAK_FORMAT_CH_LAYOUT_BITS   6
#define	TAK_SIZE_FRAME_DURATION_BITS   4
#define	TAK_SIZE_SAMPLES_NUM_BITS   35
#define	TAK_LAST_FRAME_POS_BITS   40
#define	TAK_LAST_FRAME_SIZE_BITS   24
#define	TAK_ENCODER_CODEC_BITS   6
#define	TAK_ENCODER_PROFILE_BITS   4
#define	TAK_ENCODER_VERSION_BITS   24
#define	TAK_SAMPLE_RATE_MIN   6000
#define	TAK_CHANNELS_MIN   1
#define	TAK_BPS_MIN   8
#define	TAK_FRAME_HEADER_FLAGS_BITS   3
#define	TAK_FRAME_HEADER_SYNC_ID   0xA0FF
#define	TAK_FRAME_HEADER_SYNC_ID_BITS   16
#define	TAK_FRAME_HEADER_SAMPLE_COUNT_BITS   14
#define	TAK_FRAME_HEADER_NO_BITS   21
#define	TAK_FRAME_DURATION_QUANT_SHIFT   5
#define	TAK_CRC24_BITS   24
#define	TAK_FRAME_FLAG_IS_LAST   0x1
#define	TAK_FRAME_FLAG_HAS_INFO   0x2
#define	TAK_FRAME_FLAG_HAS_METADATA   0x4
#define	TAK_MAX_CHANNELS   (1 << TAK_FORMAT_CHANNEL_BITS)
#define	TAK_MIN_FRAME_HEADER_BITS
#define	TAK_MIN_FRAME_HEADER_LAST_BITS
#define	TAK_ENCODER_BITS
#define	TAK_SIZE_BITS
#define	TAK_FORMAT_BITS
#define	TAK_STREAMINFO_BITS
#define	TAK_MAX_FRAME_HEADER_BITS
#define	TAK_STREAMINFO_BYTES   ((TAK_STREAMINFO_BITS + 7) / 8)
#define	TAK_MAX_FRAME_HEADER_BYTES   ((TAK_MAX_FRAME_HEADER_BITS + 7) / 8)
#define	TAK_MIN_FRAME_HEADER_BYTES   ((TAK_MIN_FRAME_HEADER_BITS + 7) / 8)

Typedefs
typedef struct TAKStreamInfo	TAKStreamInfo

Enumerations
enum	TAKCodecType { TAK_CODEC_MONO_STEREO = 2, TAK_CODEC_MULTICHANNEL = 4 }
enum	TAKMetaDataType {   TAK_METADATA_END = 0, TAK_METADATA_STREAMINFO, TAK_METADATA_SEEKTABLE, TAK_METADATA_SIMPLE_WAVE_DATA,   TAK_METADATA_ENCODER, TAK_METADATA_PADDING, TAK_METADATA_MD5, TAK_METADATA_LAST_FRAME }
enum	TAKFrameSizeType {   TAK_FST_94ms = 0, TAK_FST_125ms, TAK_FST_188ms, TAK_FST_250ms,   TAK_FST_4096, TAK_FST_8192, TAK_FST_16384, TAK_FST_512,   TAK_FST_1024, TAK_FST_2048 }

Functions
void	ff_tak_init_crc (void)
int	ff_tak_check_crc (const uint8_t *buf, unsigned int buf_size)
void	avpriv_tak_parse_streaminfo (GetBitContext *gb, TAKStreamInfo *s)
	Parse the Streaminfo metadata block. More...
int	ff_tak_decode_frame_header (AVCodecContext *avctx, GetBitContext *gb, TAKStreamInfo *s, int log_level_offset)
	Validate and decode a frame header. More...

Detailed Description

TAK (Tom's lossless Audio Kompressor) decoder/demuxer common functions.

Definition in file tak.h.

Macro Definition Documentation

#define BITSTREAM_READER_LE

Definition at line 32 of file tak.h.

#define TAK_BPS_MIN   8

Definition at line 51 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_CHANNELS_MIN   1

Definition at line 50 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_CRC24_BITS   24

Definition at line 58 of file tak.h.

#define TAK_ENCODER_BITS

Value:

(TAK_ENCODER_CODEC_BITS + \
                                        TAK_ENCODER_PROFILE_BITS)

Definition at line 75 of file tak.h.

#define TAK_ENCODER_CODEC_BITS   6

Definition at line 46 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_ENCODER_PROFILE_BITS   4

Definition at line 47 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_ENCODER_VERSION_BITS   24

Definition at line 48 of file tak.h.

Referenced by tak_read_header().

#define TAK_FORMAT_BITS

Value:

(TAK_FORMAT_DATA_TYPE_BITS   + \
                                        TAK_FORMAT_SAMPLE_RATE_BITS + \
                                        TAK_FORMAT_BPS_BITS         + \
                                        TAK_FORMAT_CHANNEL_BITS + 1 + \
                                        TAK_FORMAT_VALID_BITS   + 1 + \
                                        TAK_FORMAT_CH_LAYOUT_BITS   * \
                                        TAK_MAX_CHANNELS)

Definition at line 81 of file tak.h.

#define TAK_FORMAT_BPS_BITS   5

Definition at line 38 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_FORMAT_CH_LAYOUT_BITS   6

Definition at line 41 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_FORMAT_CHANNEL_BITS   4

Definition at line 39 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_FORMAT_DATA_TYPE_BITS   3

Definition at line 36 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_FORMAT_SAMPLE_RATE_BITS   18

Definition at line 37 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_FORMAT_VALID_BITS   5

Definition at line 40 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_FRAME_DURATION_QUANT_SHIFT   5

Definition at line 57 of file tak.h.

Referenced by tak_get_nb_samples().

#define TAK_FRAME_FLAG_HAS_INFO   0x2

Definition at line 62 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_FRAME_FLAG_HAS_METADATA   0x4

Definition at line 63 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_FRAME_FLAG_IS_LAST   0x1

Definition at line 61 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_FRAME_HEADER_FLAGS_BITS   3

Definition at line 52 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_FRAME_HEADER_NO_BITS   21

Definition at line 56 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_FRAME_HEADER_SAMPLE_COUNT_BITS   14

Definition at line 55 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_FRAME_HEADER_SYNC_ID   0xA0FF

Definition at line 53 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_FRAME_HEADER_SYNC_ID_BITS   16

Definition at line 54 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_LAST_FRAME_POS_BITS   40

Definition at line 44 of file tak.h.

Referenced by tak_read_header().

#define TAK_LAST_FRAME_SIZE_BITS   24

Definition at line 45 of file tak.h.

Referenced by tak_read_header().

#define TAK_MAX_CHANNELS   (1 << TAK_FORMAT_CHANNEL_BITS)

Definition at line 65 of file tak.h.

#define TAK_MAX_FRAME_HEADER_BITS

Value:

(TAK_MIN_FRAME_HEADER_LAST_BITS + \
                                        TAK_STREAMINFO_BITS + 31)

Definition at line 93 of file tak.h.

#define TAK_MAX_FRAME_HEADER_BYTES   ((TAK_MAX_FRAME_HEADER_BITS + 7) / 8)

Definition at line 97 of file tak.h.

Referenced by tak_parse().

#define TAK_MIN_FRAME_HEADER_BITS

Value:

(TAK_FRAME_HEADER_SYNC_ID_BITS + \
                                        TAK_FRAME_HEADER_FLAGS_BITS   + \
                                        TAK_FRAME_HEADER_NO_BITS      + \
                                        TAK_CRC24_BITS)

Definition at line 67 of file tak.h.

#define TAK_MIN_FRAME_HEADER_BYTES   ((TAK_MIN_FRAME_HEADER_BITS + 7) / 8)

Definition at line 98 of file tak.h.

Referenced by tak_decode_frame().

#define TAK_MIN_FRAME_HEADER_LAST_BITS

Value:

(TAK_MIN_FRAME_HEADER_BITS + 2 + \
                                        TAK_FRAME_HEADER_SAMPLE_COUNT_BITS)

Definition at line 72 of file tak.h.

#define TAK_SAMPLE_RATE_MIN   6000

Definition at line 49 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_SIZE_BITS

Value:

(TAK_SIZE_SAMPLES_NUM_BITS + \
                                        TAK_SIZE_FRAME_DURATION_BITS)

Definition at line 78 of file tak.h.

#define TAK_SIZE_FRAME_DURATION_BITS   4

Definition at line 42 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_SIZE_SAMPLES_NUM_BITS   35

Definition at line 43 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#define TAK_STREAMINFO_BITS

Value:

(TAK_ENCODER_BITS + \
                                        TAK_SIZE_BITS    + \
                                        TAK_FORMAT_BITS)

Definition at line 89 of file tak.h.

#define TAK_STREAMINFO_BYTES   ((TAK_STREAMINFO_BITS + 7) / 8)

Definition at line 96 of file tak.h.

Typedef Documentation

typedef struct TAKStreamInfo TAKStreamInfo

Enumeration Type Documentation

enum TAKCodecType

Enumerator
TAK_CODEC_MONO_STEREO
TAK_CODEC_MULTICHANNEL

Definition at line 100 of file tak.h.

enum TAKFrameSizeType

Enumerator
TAK_FST_94ms
TAK_FST_125ms
TAK_FST_188ms
TAK_FST_250ms
TAK_FST_4096
TAK_FST_8192
TAK_FST_16384
TAK_FST_512
TAK_FST_1024
TAK_FST_2048

Definition at line 116 of file tak.h.

enum TAKMetaDataType

Enumerator
TAK_METADATA_END
TAK_METADATA_STREAMINFO
TAK_METADATA_SEEKTABLE
TAK_METADATA_SIMPLE_WAVE_DATA
TAK_METADATA_ENCODER
TAK_METADATA_PADDING
TAK_METADATA_MD5
TAK_METADATA_LAST_FRAME

Definition at line 105 of file tak.h.

Function Documentation

void avpriv_tak_parse_streaminfo	(	GetBitContext *	gb,
		TAKStreamInfo *	s
	)

Parse the Streaminfo metadata block.

Parameters

[in]	gb	pointer to GetBitContext
[out]	s	storage for parsed information

Definition at line 108 of file tak.c.

Referenced by ff_tak_decode_frame_header(), and tak_read_header().

int ff_tak_check_crc	(	const uint8_t *	buf,
		unsigned int	buf_size
	)

Definition at line 92 of file tak.c.

Referenced by tak_decode_frame(), and tak_parse().

int ff_tak_decode_frame_header	(	AVCodecContext *	avctx,
		GetBitContext *	gb,
		TAKStreamInfo *	s,
		int	log_level_offset
	)

Validate and decode a frame header.

Parameters

	avctx	AVCodecContext to use as av_log() context
[in]	gb	GetBitContext from which to read frame header
[out]	s	frame information
	log_level_offset	log level offset, can be used to silence error messages.

Returns

non-zero on error, 0 if OK

Definition at line 143 of file tak.c.

Referenced by tak_decode_frame(), and tak_parse().

void ff_tak_init_crc

(

void

)

Definition at line 84 of file tak.c.

Referenced by tak_decode_init(), and tak_init().