adxdec.c File Reference

#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "adx.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "internal.h"

Go to the source code of this file.

Functions
static av_cold int	adx_decode_init (AVCodecContext *avctx)
static int	adx_decode (ADXContext *c, int16_t *out, int offset, const uint8_t *in, int ch)
	Decode 32 samples from 18 bytes. More...
static int	adx_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
static void	adx_decode_flush (AVCodecContext *avctx)

Variables
const FFCodec	ff_adpcm_adx_decoder

Detailed Description

SEGA CRI adx codecs.

Reference documents: http://ku-www.ss.titech.ac.jp/~yatsushi/adx.html adx2wav & wav2adx http://www.geocities.co.jp/Playtown/2004/

Definition in file adxdec.c.

Function Documentation

adx_decode_init()

static av_cold int adx_decode_init ( AVCodecContext *  avctx )

static

Definition at line 38 of file adxdec.c.

adx_decode()

static int adx_decode ( ADXContext *  c, int16_t *  out, int  offset, const uint8_t *  in, int  ch  )

static

Decode 32 samples from 18 bytes.

A 16-bit scalar value is applied to 32 residuals, which then have a 2nd-order LPC filter applied to it to form the output signal for a single channel.

Definition at line 66 of file adxdec.c.

Referenced by adx_decode_frame().

adx_decode_frame()

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

static

Definition at line 96 of file adxdec.c.

adx_decode_flush()

static void adx_decode_flush ( AVCodecContext *  avctx )

static

Definition at line 186 of file adxdec.c.

Variable Documentation

ff_adpcm_adx_decoder

const FFCodec ff_adpcm_adx_decoder

Initial value:

= {
    .p.name         = "adpcm_adx",
    .p.long_name    = NULL_IF_CONFIG_SMALL("SEGA CRI ADX ADPCM"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_ADPCM_ADX,
    .priv_data_size = sizeof(ADXContext),
    .init           = adx_decode_init,
    FF_CODEC_DECODE_CB(adx_decode_frame),
    .flush          = adx_decode_flush,
    .p.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
                      AV_CODEC_CAP_DR1,
    .p.sample_fmts  = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_NONE },
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 193 of file adxdec.c.