takdec.c File Reference

TAK (Tom's lossless Audio Kompressor) decoder. More...

#include "libavutil/attributes.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/samplefmt.h"
#include "audiodsp.h"
#include "thread.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "unary.h"
#include "tak.h"
#include "takdsp.h"

Go to the source code of this file.

Data Structures
struct	MCDParam
struct	TAKDecContext
struct	CParam

Macros
#define	CACHED_BITSTREAM_READER   !ARCH_X86_32
#define	BITSTREAM_READER_LE
#define	MAX_SUBFRAMES   8
	max number of subframes per channel
#define	MAX_PREDICTORS   256

Functions
static int	set_bps_params (AVCodecContext *avctx)
static void	set_sample_rate_params (AVCodecContext *avctx)
static av_cold int	tak_decode_init (AVCodecContext *avctx)
static void	decode_lpc (int32_t *coeffs, int mode, int length)
static int	decode_segment (TAKDecContext *s, int8_t mode, int32_t *decoded, int len)
static int	decode_residues (TAKDecContext *s, int32_t *decoded, int length)
static int	get_bits_esc4 (GetBitContext *gb)
static int	decode_subframe (TAKDecContext *s, int32_t *decoded, int subframe_size, int prev_subframe_size)
static int	decode_channel (TAKDecContext *s, int chan)
static int	decorrelate (TAKDecContext *s, int c1, int c2, int length)
static int	tak_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *pkt)
static av_cold int	tak_decode_close (AVCodecContext *avctx)

Variables
static const int8_t	mc_dmodes [] = { 1, 3, 4, 6, }
static const uint16_t	predictor_sizes []
static const struct CParam	xcodes [50]
const FFCodec	ff_tak_decoder

Detailed Description

TAK (Tom's lossless Audio Kompressor) decoder.

Author

Paul B Mahol

Definition in file takdec.c.

Macro Definition Documentation

CACHED_BITSTREAM_READER

#define CACHED_BITSTREAM_READER   !ARCH_X86_32

Definition at line 34 of file takdec.c.

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 35 of file takdec.c.

MAX_SUBFRAMES

#define MAX_SUBFRAMES   8

max number of subframes per channel

Definition at line 44 of file takdec.c.

Referenced by decode_init(), decode_init(), decode_tilehdr(), and decode_tilehdr().

MAX_PREDICTORS

#define MAX_PREDICTORS   256

Definition at line 45 of file takdec.c.

Function Documentation

set_bps_params()

static int set_bps_params ( AVCodecContext * avctx )

static

Definition at line 148 of file takdec.c.

Referenced by tak_decode_frame(), and tak_decode_init().

set_sample_rate_params()

static void set_sample_rate_params ( AVCodecContext * avctx )

static

Definition at line 169 of file takdec.c.

Referenced by tak_decode_frame(), and tak_decode_init().

tak_decode_init()

static av_cold int tak_decode_init ( AVCodecContext * avctx )

static

Definition at line 187 of file takdec.c.

decode_lpc()

static void decode_lpc ( int32_t * coeffs, int mode, int length )

static

Definition at line 202 of file takdec.c.

Referenced by decode_subframe(), and tak_decode_frame().

decode_segment()

static int decode_segment ( TAKDecContext * s, int8_t mode, int32_t * decoded, int len )

static

Definition at line 258 of file takdec.c.

Referenced by decode_residues().

decode_residues()

static int decode_residues ( TAKDecContext * s, int32_t * decoded, int length )

static

Definition at line 302 of file takdec.c.

Referenced by decode_subframe().

get_bits_esc4()

static int get_bits_esc4 ( GetBitContext * gb )

static

Definition at line 381 of file takdec.c.

Referenced by decode_channel(), decode_subframe(), and decorrelate().

decode_subframe()

static int decode_subframe ( TAKDecContext * s, int32_t * decoded, int subframe_size, int prev_subframe_size )

static

Definition at line 389 of file takdec.c.

Referenced by decode_channel().

decode_channel()

static int decode_channel ( TAKDecContext * s, int chan )

static

Definition at line 514 of file takdec.c.

Referenced by tak_decode_frame().

decorrelate()

static int decorrelate ( TAKDecContext * s, int c1, int c2, int length )

static

Definition at line 561 of file takdec.c.

Referenced by tak_decode_frame().

tak_decode_frame()

static int tak_decode_frame ( AVCodecContext * avctx, AVFrame * frame, int * got_frame_ptr, AVPacket * pkt )

static

Definition at line 681 of file takdec.c.

tak_decode_close()

static av_cold int tak_decode_close ( AVCodecContext * avctx )

static

Definition at line 939 of file takdec.c.

Variable Documentation

mc_dmodes

const int8_t mc_dmodes[] = { 1, 3, 4, 6, }

static

Definition at line 83 of file takdec.c.

Referenced by tak_decode_frame().

predictor_sizes

const uint16_t predictor_sizes[]

static

Initial value:

= {
    4, 8, 12, 16, 24, 32, 48, 64, 80, 96, 128, 160, 192, 224, 256, 0,
}

Definition at line 85 of file takdec.c.

Referenced by decode_subframe().

xcodes

const struct CParam xcodes[50]

static

Referenced by decode_segment().

ff_tak_decoder

const FFCodec ff_tak_decoder

Initial value:

= {
    .p.name           = "tak",
    CODEC_LONG_NAME("TAK (Tom's lossless Audio Kompressor)"),
    .p.type           = AVMEDIA_TYPE_AUDIO,
    .p.id             = AV_CODEC_ID_TAK,
    .priv_data_size   = sizeof(TAKDecContext),
    .init             = tak_decode_init,
    .close            = tak_decode_close,
    FF_CODEC_DECODE_CB(tak_decode_frame),
    UPDATE_THREAD_CONTEXT(update_thread_context),
    .p.capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_CHANNEL_CONF,
}

Definition at line 948 of file takdec.c.