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

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

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)

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.

int	ff_tak_decode_frame_header (AVCodecContext avctx, GetBitContext gb, TAKStreamInfo *s, int log_level_offset)
	Validate and decode a frame header.

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_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_BPS_BITS 5

Definition at line 38 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_VALID_BITS 5

Definition at line 40 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_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_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_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_SAMPLE_RATE_MIN 6000

Definition at line 49 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_BPS_MIN 8

Definition at line 51 of file tak.h.

Referenced by avpriv_tak_parse_streaminfo().

#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_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_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_NO_BITS 21

Definition at line 56 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_FRAME_DURATION_QUANT_SHIFT 5

Definition at line 57 of file tak.h.

Referenced by tak_get_nb_samples().

#define TAK_CRC24_BITS 24

Definition at line 58 of file tak.h.

#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_FLAG_HAS_INFO 0x2

Definition at line 62 of file tak.h.

Referenced by ff_tak_decode_frame_header(), and tak_parse().

#define TAK_FRAME_FLAG_HAS_METADATA 0x4

Definition at line 63 of file tak.h.

Referenced by ff_tak_decode_frame_header().

#define TAK_MAX_CHANNELS (1 << TAK_FORMAT_CHANNEL_BITS)

Definition at line 65 of file tak.h.

#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_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_ENCODER_BITS

Value:

(TAK_ENCODER_CODEC_BITS + \

TAK_ENCODER_PROFILE_BITS)

Definition at line 75 of file tak.h.

#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_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_STREAMINFO_BITS

Value:

(TAK_ENCODER_BITS + \
                                        TAK_SIZE_BITS    + \
                                        TAK_FORMAT_BITS)

Definition at line 89 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_STREAMINFO_BYTES ((TAK_STREAMINFO_BITS + 7) / 8)

Definition at line 96 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_BYTES ((TAK_MIN_FRAME_HEADER_BITS + 7) / 8)

Definition at line 98 of file tak.h.

Referenced by tak_decode_frame().

Enumeration Type Documentation

enum TAKCodecType

Enumerator:

TAK_CODEC_MONO_STEREO
TAK_CODEC_MULTICHANNEL

Definition at line 100 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.

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.

Function Documentation

void ff_tak_init_crc ( void )

Definition at line 83 of file tak.c.

Referenced by tak_decode_init(), and tak_init().

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

Definition at line 91 of file tak.c.

Referenced by tak_decode_frame(), and tak_parse().

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 107 of file tak.c.

Referenced by ff_tak_decode_frame_header(), and tak_read_header().

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 142 of file tak.c.

Referenced by tak_decode_frame(), and tak_parse().

Data Structures

Macros

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation