atrac3plusdec.c File Reference

Sony ATRAC3+ compatible decoder. More...

#include <stdint.h>
#include <string.h>
#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.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 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, void *data, int *got_frame_ptr, AVPacket *avpkt)

Variables
AVCodec	ff_atrac3p_decoder
AVCodec	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

static av_cold int atrac3p_decode_close ( AVCodecContext *  avctx )

static

Definition at line 68 of file atrac3plusdec.c.

Referenced by atrac3p_decode_init().

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

static

Definition at line 81 of file atrac3plusdec.c.

Referenced by atrac3p_decode_init().

static av_cold int atrac3p_decode_init ( AVCodecContext *  avctx )

static

Definition at line 147 of file atrac3plusdec.c.

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 201 of file atrac3plusdec.c.

Referenced by atrac3p_decode_frame().

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

static

Definition at line 265 of file atrac3plusdec.c.

Referenced by atrac3p_decode_frame().

static int atrac3p_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 330 of file atrac3plusdec.c.

Variable Documentation

AVCodec ff_atrac3p_decoder

Initial value:

= {
    .name           = "atrac3plus",
    .long_name      = NULL_IF_CONFIG_SMALL("ATRAC3+ (Adaptive TRansform Acoustic Coding 3+)"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_ATRAC3P,
    .capabilities   = AV_CODEC_CAP_DR1,
    .priv_data_size = sizeof(ATRAC3PContext),
    .init           = atrac3p_decode_init,
    .close          = atrac3p_decode_close,
    .decode         = atrac3p_decode_frame,
}

Definition at line 390 of file atrac3plusdec.c.

AVCodec ff_atrac3pal_decoder

Initial value:

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

Definition at line 402 of file atrac3plusdec.c.