mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-05 01:56:41 +00:00
faba79e080
* qatar/master:
mxfdec: Include FF_INPUT_BUFFER_PADDING_SIZE when allocating extradata.
H.264: tweak some other x86 asm for Atom
probe: Fix insane flow control.
mpegts: remove invalid error check
s302m: use nondeprecated audio sample format API
lavc: use designated initialisers for all codecs.
x86: cabac: add operand size suffixes missing from 6c32576
Conflicts:
libavcodec/ac3enc_float.c
libavcodec/flacenc.c
libavcodec/frwu.c
libavcodec/pictordec.c
libavcodec/qtrleenc.c
libavcodec/v210enc.c
libavcodec/wmv2dec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
179 lines
4.6 KiB
C
179 lines
4.6 KiB
C
/*
|
|
* ADX ADPCM codecs
|
|
* Copyright (c) 2001,2003 BERO
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avcodec.h"
|
|
#include "adx.h"
|
|
|
|
/**
|
|
* @file
|
|
* 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/
|
|
*/
|
|
|
|
static av_cold int adx_decode_init(AVCodecContext *avctx)
|
|
{
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
|
|
return 0;
|
|
}
|
|
|
|
/* 18 bytes <-> 32 samples */
|
|
|
|
static void adx_decode(short *out,const unsigned char *in,PREV *prev)
|
|
{
|
|
int scale = AV_RB16(in);
|
|
int i;
|
|
int s0,s1,s2,d;
|
|
|
|
// printf("%x ",scale);
|
|
|
|
in+=2;
|
|
s1 = prev->s1;
|
|
s2 = prev->s2;
|
|
for(i=0;i<16;i++) {
|
|
d = in[i];
|
|
// d>>=4; if (d&8) d-=16;
|
|
d = ((signed char)d >> 4);
|
|
s0 = (BASEVOL*d*scale + SCALE1*s1 - SCALE2*s2)>>14;
|
|
s2 = s1;
|
|
s1 = av_clip_int16(s0);
|
|
*out++=s1;
|
|
|
|
d = in[i];
|
|
//d&=15; if (d&8) d-=16;
|
|
d = ((signed char)(d<<4) >> 4);
|
|
s0 = (BASEVOL*d*scale + SCALE1*s1 - SCALE2*s2)>>14;
|
|
s2 = s1;
|
|
s1 = av_clip_int16(s0);
|
|
*out++=s1;
|
|
}
|
|
prev->s1 = s1;
|
|
prev->s2 = s2;
|
|
|
|
}
|
|
|
|
static void adx_decode_stereo(short *out,const unsigned char *in,PREV *prev)
|
|
{
|
|
short tmp[32*2];
|
|
int i;
|
|
|
|
adx_decode(tmp ,in ,prev);
|
|
adx_decode(tmp+32,in+18,prev+1);
|
|
for(i=0;i<32;i++) {
|
|
out[i*2] = tmp[i];
|
|
out[i*2+1] = tmp[i+32];
|
|
}
|
|
}
|
|
|
|
/* return data offset or 0 */
|
|
static int adx_decode_header(AVCodecContext *avctx,const unsigned char *buf,size_t bufsize)
|
|
{
|
|
int offset;
|
|
|
|
if (buf[0]!=0x80) return 0;
|
|
offset = (AV_RB32(buf)^0x80000000)+4;
|
|
if (bufsize<offset || memcmp(buf+offset-6,"(c)CRI",6)) return 0;
|
|
|
|
avctx->channels = buf[7];
|
|
avctx->sample_rate = AV_RB32(buf+8);
|
|
avctx->bit_rate = avctx->sample_rate*avctx->channels*18*8/32;
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int adx_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf0 = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
ADXContext *c = avctx->priv_data;
|
|
short *samples = data;
|
|
const uint8_t *buf = buf0;
|
|
int rest = buf_size;
|
|
|
|
if (!c->header_parsed) {
|
|
int hdrsize = adx_decode_header(avctx,buf,rest);
|
|
if (hdrsize==0) return -1;
|
|
c->header_parsed = 1;
|
|
buf += hdrsize;
|
|
rest -= hdrsize;
|
|
}
|
|
|
|
/* 18 bytes of data are expanded into 32*2 bytes of audio,
|
|
so guard against buffer overflows */
|
|
if(rest/18 > *data_size/64)
|
|
rest = (*data_size/64) * 18;
|
|
|
|
if (c->in_temp) {
|
|
int copysize = 18*avctx->channels - c->in_temp;
|
|
memcpy(c->dec_temp+c->in_temp,buf,copysize);
|
|
rest -= copysize;
|
|
buf += copysize;
|
|
if (avctx->channels==1) {
|
|
adx_decode(samples,c->dec_temp,c->prev);
|
|
samples += 32;
|
|
} else {
|
|
adx_decode_stereo(samples,c->dec_temp,c->prev);
|
|
samples += 32*2;
|
|
}
|
|
}
|
|
//
|
|
if (avctx->channels==1) {
|
|
while(rest>=18) {
|
|
adx_decode(samples,buf,c->prev);
|
|
rest-=18;
|
|
buf+=18;
|
|
samples+=32;
|
|
}
|
|
} else {
|
|
while(rest>=18*2) {
|
|
adx_decode_stereo(samples,buf,c->prev);
|
|
rest-=18*2;
|
|
buf+=18*2;
|
|
samples+=32*2;
|
|
}
|
|
}
|
|
//
|
|
c->in_temp = rest;
|
|
if (rest) {
|
|
memcpy(c->dec_temp,buf,rest);
|
|
buf+=rest;
|
|
}
|
|
*data_size = (uint8_t*)samples - (uint8_t*)data;
|
|
// printf("%d:%d ",buf-buf0,*data_size); fflush(stdout);
|
|
return buf-buf0;
|
|
}
|
|
|
|
AVCodec ff_adpcm_adx_decoder = {
|
|
.name = "adpcm_adx",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = CODEC_ID_ADPCM_ADX,
|
|
.priv_data_size = sizeof(ADXContext),
|
|
.init = adx_decode_init,
|
|
.decode = adx_decode_frame,
|
|
.long_name = NULL_IF_CONFIG_SMALL("SEGA CRI ADX ADPCM"),
|
|
};
|
|
|