atrac3plusdec.c File Reference

#include <stdint.h>
#include <string.h>
#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "atrac.h"
#include "atrac3plus.h"

Go to the source code of this file.

Data Structures
struct	ATRAC3PContext

Functions
static av_cold int	atrac3p_decode_close (AVCodecContext *avctx)
static av_cold int	set_channel_params (ATRAC3PContext *ctx, AVCodecContext *avctx)
static av_cold void	atrac3p_init_static (void)
static av_cold int	atrac3p_decode_init (AVCodecContext *avctx)
static void	decode_residual_spectrum (ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit, float out[2][ATRAC3P_FRAME_SAMPLES], int num_channels, AVCodecContext *avctx)
static void	reconstruct_frame (ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit, int num_channels, AVCodecContext *avctx)
static int	atrac3p_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)

Variables
static const uint8_t	channel_map [8][8]
const FFCodec	ff_atrac3p_decoder
const FFCodec	ff_atrac3pal_decoder

Detailed Description

Sony ATRAC3+ compatible decoder.

Container formats used to store its data: RIFF WAV (.at3) and Sony OpenMG (.oma, .aa3).

Technical description of this codec can be found here: http://wiki.multimedia.cx/index.php?title=ATRAC3plus

Kudos to Benjamin Larsson and Michael Karcher for their precious technical help!

Definition in file atrac3plusdec.c.

Function Documentation

atrac3p_decode_close()

static av_cold int atrac3p_decode_close ( AVCodecContext *  avctx )

static

Definition at line 85 of file atrac3plusdec.c.

set_channel_params()

static av_cold int set_channel_params ( ATRAC3PContext *  ctx, AVCodecContext *  avctx  )

static

Definition at line 98 of file atrac3plusdec.c.

Referenced by atrac3p_decode_init().

atrac3p_init_static()

static av_cold void atrac3p_init_static ( void  )

static

Definition at line 166 of file atrac3plusdec.c.

Referenced by atrac3p_decode_init().

atrac3p_decode_init()

static av_cold int atrac3p_decode_init ( AVCodecContext *  avctx )

static

Definition at line 172 of file atrac3plusdec.c.

decode_residual_spectrum()

static void decode_residual_spectrum ( ATRAC3PContext *  ctx, Atrac3pChanUnitCtx *  ch_unit, float  out[2][ATRAC3P_FRAME_SAMPLES], int  num_channels, AVCodecContext *  avctx  )

static

Definition at line 231 of file atrac3plusdec.c.

Referenced by atrac3p_decode_frame().

reconstruct_frame()

static void reconstruct_frame ( ATRAC3PContext *  ctx, Atrac3pChanUnitCtx *  ch_unit, int  num_channels, AVCodecContext *  avctx  )

static

Definition at line 295 of file atrac3plusdec.c.

Referenced by atrac3p_decode_frame().

atrac3p_decode_frame()

static int atrac3p_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 361 of file atrac3plusdec.c.

Variable Documentation

channel_map

const uint8_t channel_map[8][8]

static

Initial value:

= {
    { 0, },
    { 0, 1, },
    { 0, 1, 2, },
    { 0, 1, 2, 3, },
    { 0, },
    { 0, 1, 2, 4, 5, 3, },
    { 0, 1, 2, 4, 5, 6, 3, },
    { 0, 1, 2, 4, 5, 6, 7, 3, },
}

Definition at line 52 of file atrac3plusdec.c.

Referenced by ac3_decode_frame(), copy_input_samples(), ff_eac3_parse_header(), ff_opus_parse_extradata(), libopus_copy_samples_with_channel_map(), libopus_decode_init(), libopus_validate_layout_and_get_channel_map(), mov_write_dops_tag(), pulse_map_channels_to_pulse(), pulse_write_header(), set_channel_params(), and swr_set_channel_mapping().

ff_atrac3p_decoder

const FFCodec ff_atrac3p_decoder

Initial value:

= {
    .p.name         = "atrac3plus",
    CODEC_LONG_NAME("ATRAC3+ (Adaptive TRansform Acoustic Coding 3+)"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_ATRAC3P,
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
    .priv_data_size = sizeof(ATRAC3PContext),
    .init           = atrac3p_decode_init,
    .close          = atrac3p_decode_close,
    FF_CODEC_DECODE_CB(atrac3p_decode_frame),
}

Definition at line 420 of file atrac3plusdec.c.

ff_atrac3pal_decoder

const FFCodec ff_atrac3pal_decoder

Initial value:

= {
    .p.name         = "atrac3plusal",
    CODEC_LONG_NAME("ATRAC3+ AL (Adaptive TRansform Acoustic Coding 3+ Advanced Lossless)"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_ATRAC3PAL,
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
    .priv_data_size = sizeof(ATRAC3PContext),
    .init           = atrac3p_decode_init,
    .close          = atrac3p_decode_close,
    FF_CODEC_DECODE_CB(atrac3p_decode_frame),
}

Definition at line 433 of file atrac3plusdec.c.