mirror of https://github.com/mpv-player/mpv
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "config.h"
|
|
#include "ad_internal.h"
|
|
|
|
static ad_info_t info =
|
|
{
|
|
"native GSM/MSGSM audio decoder",
|
|
"msgsm",
|
|
"A'rpi",
|
|
"XAnim",
|
|
""
|
|
};
|
|
|
|
LIBAD_EXTERN(msgsm)
|
|
|
|
#include "native/xa_gsm.h"
|
|
|
|
static int init(sh_audio_t *sh_audio)
|
|
{
|
|
if(!sh_audio->wf) return 0;
|
|
// MS-GSM audio codec:
|
|
GSM_Init();
|
|
sh_audio->channels=sh_audio->wf->nChannels;
|
|
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
|
|
sh_audio->samplesize=2;
|
|
// decodes 65 byte -> 320 short
|
|
// 1 sec: sh_audio->channels*sh_audio->samplerate samples
|
|
// 1 frame: 320 samples
|
|
if(sh_audio->format==0x31 || sh_audio->format==0x32){
|
|
sh_audio->ds->ss_mul=65; sh_audio->ds->ss_div=320;
|
|
} else {
|
|
sh_audio->ds->ss_mul=33; sh_audio->ds->ss_div=160;
|
|
}
|
|
sh_audio->i_bps=sh_audio->ds->ss_mul*(sh_audio->channels*sh_audio->samplerate)/sh_audio->ds->ss_div; // 1:10
|
|
return 1;
|
|
}
|
|
|
|
static int preinit(sh_audio_t *sh_audio)
|
|
{
|
|
sh_audio->audio_out_minsize=4*320;
|
|
return 1;
|
|
}
|
|
|
|
static void uninit(sh_audio_t *sh)
|
|
{
|
|
}
|
|
|
|
static int control(sh_audio_t *sh,int cmd,void* arg, ...)
|
|
{
|
|
return CONTROL_UNKNOWN;
|
|
}
|
|
|
|
static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
|
|
{
|
|
if(sh_audio->format==0x31 || sh_audio->format==0x32){
|
|
unsigned char ibuf[65]; // 65 bytes / frame
|
|
if(demux_read_data(sh_audio->ds,ibuf,65)!=65) return -1; // EOF
|
|
XA_MSGSM_Decoder(ibuf,(unsigned short *) buf); // decodes 65 byte -> 320 short
|
|
return 2*320;
|
|
} else {
|
|
unsigned char ibuf[33]; // 33 bytes / frame
|
|
if(demux_read_data(sh_audio->ds,ibuf,33)!=33) return -1; // EOF
|
|
XA_GSM_Decoder(ibuf,(unsigned short *) buf); // decodes 33 byte -> 160 short
|
|
return 2*160;
|
|
}
|
|
}
|