mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-24 03:39:45 +00:00
408 lines
9.4 KiB
C
408 lines
9.4 KiB
C
/*
|
|
* ADX ADPCM codecs
|
|
* Copyright (c) 2001,2003 BERO
|
|
*
|
|
* This library 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 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include "avcodec.h"
|
|
|
|
/**
|
|
* @file adx.c
|
|
* 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/
|
|
*/
|
|
|
|
typedef struct {
|
|
int s1,s2;
|
|
} PREV;
|
|
|
|
typedef struct {
|
|
PREV prev[2];
|
|
int header_parsed;
|
|
unsigned char dec_temp[18*2];
|
|
unsigned short enc_temp[32*2];
|
|
int in_temp;
|
|
} ADXContext;
|
|
|
|
//#define BASEVOL 0x11e0
|
|
#define BASEVOL 0x4000
|
|
#define SCALE1 0x7298
|
|
#define SCALE2 0x3350
|
|
|
|
#define CLIP(s) if (s>32767) s=32767; else if (s<-32768) s=-32768
|
|
|
|
/* 18 bytes <-> 32 samples */
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
static void adx_encode(unsigned char *adx,const short *wav,PREV *prev)
|
|
{
|
|
int scale;
|
|
int i;
|
|
int s0,s1,s2,d;
|
|
int max=0;
|
|
int min=0;
|
|
int data[32];
|
|
|
|
s1 = prev->s1;
|
|
s2 = prev->s2;
|
|
for(i=0;i<32;i++) {
|
|
s0 = wav[i];
|
|
d = ((s0<<14) - SCALE1*s1 + SCALE2*s2)/BASEVOL;
|
|
data[i]=d;
|
|
if (max<d) max=d;
|
|
if (min>d) min=d;
|
|
s2 = s1;
|
|
s1 = s0;
|
|
}
|
|
prev->s1 = s1;
|
|
prev->s2 = s2;
|
|
|
|
/* -8..+7 */
|
|
|
|
if (max==0 && min==0) {
|
|
memset(adx,0,18);
|
|
return;
|
|
}
|
|
|
|
if (max/7>-min/8) scale = max/7;
|
|
else scale = -min/8;
|
|
|
|
if (scale==0) scale=1;
|
|
|
|
adx[0] = scale>>8;
|
|
adx[1] = scale;
|
|
|
|
for(i=0;i<16;i++) {
|
|
adx[i+2] = ((data[i*2]/scale)<<4) | ((data[i*2+1]/scale)&0xf);
|
|
}
|
|
}
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
static void adx_decode(short *out,const unsigned char *in,PREV *prev)
|
|
{
|
|
int scale = ((in[0]<<8)|(in[1]));
|
|
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;
|
|
CLIP(s0);
|
|
*out++=s0;
|
|
s2 = s1;
|
|
s1 = s0;
|
|
|
|
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;
|
|
CLIP(s0);
|
|
*out++=s0;
|
|
s2 = s1;
|
|
s1 = s0;
|
|
}
|
|
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];
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
|
|
static void write_long(unsigned char *p,uint32_t v)
|
|
{
|
|
p[0] = v>>24;
|
|
p[1] = v>>16;
|
|
p[2] = v>>8;
|
|
p[3] = v;
|
|
}
|
|
|
|
static int adx_encode_header(AVCodecContext *avctx,unsigned char *buf,size_t bufsize)
|
|
{
|
|
#if 0
|
|
struct {
|
|
uint32_t offset; /* 0x80000000 + sample start - 4 */
|
|
unsigned char unknown1[3]; /* 03 12 04 */
|
|
unsigned char channel; /* 1 or 2 */
|
|
uint32_t freq;
|
|
uint32_t size;
|
|
uint32_t unknown2; /* 01 f4 03 00 */
|
|
uint32_t unknown3; /* 00 00 00 00 */
|
|
uint32_t unknown4; /* 00 00 00 00 */
|
|
|
|
/* if loop
|
|
unknown3 00 15 00 01
|
|
unknown4 00 00 00 01
|
|
long loop_start_sample;
|
|
long loop_start_byte;
|
|
long loop_end_sample;
|
|
long loop_end_byte;
|
|
long
|
|
*/
|
|
} adxhdr; /* big endian */
|
|
/* offset-6 "(c)CRI" */
|
|
#endif
|
|
write_long(buf+0x00,0x80000000|0x20);
|
|
write_long(buf+0x04,0x03120400|avctx->channels);
|
|
write_long(buf+0x08,avctx->sample_rate);
|
|
write_long(buf+0x0c,0); /* FIXME: set after */
|
|
write_long(buf+0x10,0x01040300);
|
|
write_long(buf+0x14,0x00000000);
|
|
write_long(buf+0x18,0x00000000);
|
|
memcpy(buf+0x1c,"\0\0(c)CRI",8);
|
|
return 0x20+4;
|
|
}
|
|
|
|
static int adx_decode_init(AVCodecContext *avctx);
|
|
static int adx_encode_init(AVCodecContext *avctx)
|
|
{
|
|
if (avctx->channels > 2)
|
|
return -1; /* only stereo or mono =) */
|
|
avctx->frame_size = 32;
|
|
|
|
avctx->coded_frame= avcodec_alloc_frame();
|
|
avctx->coded_frame->key_frame= 1;
|
|
|
|
// avctx->bit_rate = avctx->sample_rate*avctx->channels*18*8/32;
|
|
|
|
printf("adx encode init\n"); fflush(stdout);
|
|
adx_decode_init(avctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adx_encode_close(AVCodecContext *avctx)
|
|
{
|
|
av_freep(&avctx->coded_frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adx_encode_frame(AVCodecContext *avctx,
|
|
unsigned char *frame, int buf_size, const void *data)
|
|
{
|
|
ADXContext *c = avctx->priv_data;
|
|
const short *samples = data;
|
|
unsigned char *dst = frame;
|
|
int rest = avctx->frame_size;
|
|
|
|
/*
|
|
input data size =
|
|
ffmpeg.c: do_audio_out()
|
|
frame_bytes = enc->frame_size * 2 * enc->channels;
|
|
*/
|
|
|
|
// printf("sz=%d ",buf_size); fflush(stdout);
|
|
if (!c->header_parsed) {
|
|
int hdrsize = adx_encode_header(avctx,dst,buf_size);
|
|
dst+=hdrsize;
|
|
c->header_parsed = 1;
|
|
}
|
|
|
|
if (avctx->channels==1) {
|
|
while(rest>=32) {
|
|
adx_encode(dst,samples,c->prev);
|
|
dst+=18;
|
|
samples+=32;
|
|
rest-=32;
|
|
}
|
|
} else {
|
|
while(rest>=32*2) {
|
|
short tmpbuf[32*2];
|
|
int i;
|
|
|
|
for(i=0;i<32;i++) {
|
|
tmpbuf[i] = samples[i*2];
|
|
tmpbuf[i+32] = samples[i*2+1];
|
|
}
|
|
|
|
adx_encode(dst,tmpbuf,c->prev);
|
|
adx_encode(dst+18,tmpbuf+32,c->prev+1);
|
|
dst+=18*2;
|
|
samples+=32*2;
|
|
rest-=32*2;
|
|
}
|
|
}
|
|
return dst-frame;
|
|
}
|
|
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
static uint32_t read_long(const unsigned char *p)
|
|
{
|
|
return (p[0]<<24)|(p[1]<<16)|(p[2]<<8)|p[3];
|
|
}
|
|
|
|
int is_adx(const unsigned char *buf,size_t bufsize)
|
|
{
|
|
int offset;
|
|
|
|
if (buf[0]!=0x80) return 0;
|
|
offset = (read_long(buf)^0x80000000)+4;
|
|
if (bufsize<offset || memcmp(buf+offset-6,"(c)CRI",6)) return 0;
|
|
return offset;
|
|
}
|
|
|
|
/* return data offset or 6 */
|
|
static int adx_decode_header(AVCodecContext *avctx,const unsigned char *buf,size_t bufsize)
|
|
{
|
|
int offset;
|
|
int channels,freq,size;
|
|
|
|
offset = is_adx(buf,bufsize);
|
|
if (offset==0) return 0;
|
|
|
|
channels = buf[7];
|
|
freq = read_long(buf+8);
|
|
size = read_long(buf+12);
|
|
|
|
// printf("freq=%d ch=%d\n",freq,channels);
|
|
|
|
avctx->sample_rate = freq;
|
|
avctx->channels = channels;
|
|
avctx->bit_rate = freq*channels*18*8/32;
|
|
// avctx->frame_size = 18*channels;
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int adx_decode_init(AVCodecContext * avctx)
|
|
{
|
|
ADXContext *c = avctx->priv_data;
|
|
|
|
// printf("adx_decode_init\n"); fflush(stdout);
|
|
c->prev[0].s1 = 0;
|
|
c->prev[0].s2 = 0;
|
|
c->prev[1].s1 = 0;
|
|
c->prev[1].s2 = 0;
|
|
c->header_parsed = 0;
|
|
c->in_temp = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void dump(unsigned char *buf,size_t len)
|
|
{
|
|
int i;
|
|
for(i=0;i<len;i++) {
|
|
if ((i&15)==0) printf("%04x ",i);
|
|
printf("%02x ",buf[i]);
|
|
if ((i&15)==15) printf("\n");
|
|
}
|
|
printf("\n");
|
|
}
|
|
static int adx_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
const uint8_t *buf0, int buf_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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
AVCodec adx_adpcm_encoder = {
|
|
"adx_adpcm",
|
|
CODEC_TYPE_AUDIO,
|
|
CODEC_ID_ADPCM_ADX,
|
|
sizeof(ADXContext),
|
|
adx_encode_init,
|
|
adx_encode_frame,
|
|
adx_encode_close,
|
|
NULL,
|
|
};
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
AVCodec adx_adpcm_decoder = {
|
|
"adx_adpcm",
|
|
CODEC_TYPE_AUDIO,
|
|
CODEC_ID_ADPCM_ADX,
|
|
sizeof(ADXContext),
|
|
adx_decode_init,
|
|
NULL,
|
|
NULL,
|
|
adx_decode_frame,
|
|
};
|
|
|