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takdec.c File Reference

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

#include "libavutil/internal.h"
#include "libavutil/samplefmt.h"
#include "tak.h"
#include "audiodsp.h"
#include "thread.h"
#include "avcodec.h"
#include "internal.h"
#include "unary.h"

Go to the source code of this file.

Data Structures

struct  MCDParam
 
struct  TAKDecContext
 
struct  CParam
 

Macros

#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, void *data, int *got_frame_ptr, AVPacket *pkt)
 
static int init_thread_copy (AVCodecContext *avctx)
 
static int update_thread_context (AVCodecContext *dst, const AVCodecContext *src)
 
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 struct CParam xcodes [50]
 
AVCodec ff_tak_decoder
 

Detailed Description

TAK (Tom's lossless Audio Kompressor) decoder.

Author
Paul B Mahol

Definition in file takdec.c.

Macro Definition Documentation

#define MAX_SUBFRAMES   8

max number of subframes per channel

Definition at line 37 of file takdec.c.

#define MAX_PREDICTORS   256

Definition at line 38 of file takdec.c.

Referenced by decode_subframe().

Function Documentation

static int set_bps_params ( AVCodecContext avctx)
static

Definition at line 140 of file takdec.c.

Referenced by tak_decode_frame(), and tak_decode_init().

static void set_sample_rate_params ( AVCodecContext avctx)
static

Definition at line 161 of file takdec.c.

Referenced by tak_decode_frame(), and tak_decode_init().

static av_cold int tak_decode_init ( AVCodecContext avctx)
static

Definition at line 170 of file takdec.c.

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

Definition at line 184 of file takdec.c.

Referenced by decode_subframe(), and tak_decode_frame().

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

Definition at line 239 of file takdec.c.

Referenced by decode_residues().

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

Definition at line 283 of file takdec.c.

Referenced by decode_subframe().

static int get_bits_esc4 ( GetBitContext gb)
static

Definition at line 362 of file takdec.c.

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

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

Definition at line 370 of file takdec.c.

Referenced by decode_channel().

static int decode_channel ( TAKDecContext s,
int  chan 
)
static

Definition at line 494 of file takdec.c.

Referenced by tak_decode_frame().

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

Definition at line 541 of file takdec.c.

Referenced by tak_decode_frame().

static int tak_decode_frame ( AVCodecContext avctx,
void data,
int *  got_frame_ptr,
AVPacket pkt 
)
static

Definition at line 670 of file takdec.c.

static int init_thread_copy ( AVCodecContext avctx)
static

Definition at line 905 of file takdec.c.

static int update_thread_context ( AVCodecContext dst,
const AVCodecContext src 
)
static

Definition at line 912 of file takdec.c.

static av_cold int tak_decode_close ( AVCodecContext avctx)
static

Definition at line 924 of file takdec.c.

Variable Documentation

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

Definition at line 75 of file takdec.c.

Referenced by tak_decode_frame().

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 77 of file takdec.c.

Referenced by decode_subframe().

struct CParam xcodes[50]
static

Referenced by decode_segment().

AVCodec ff_tak_decoder
Initial value:
= {
.name = "tak",
.long_name = NULL_IF_CONFIG_SMALL("TAK (Tom's lossless Audio Kompressor)"),
.priv_data_size = sizeof(TAKDecContext),
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
}

Definition at line 933 of file takdec.c.