mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 15:22:09 +00:00
5f92d26132
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22605 b3059339-0415-0410-9bf9-f77b7e298cf2
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "config.h"
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#include "ad_internal.h"
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static ad_info_t info =
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{
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"native GSM/MSGSM audio decoder",
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"msgsm",
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"A'rpi",
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"XAnim",
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""
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};
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LIBAD_EXTERN(msgsm)
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#include "native/xa_gsm.h"
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static int init(sh_audio_t *sh_audio)
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{
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if(!sh_audio->wf) return 0;
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// MS-GSM audio codec:
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GSM_Init();
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sh_audio->channels=sh_audio->wf->nChannels;
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sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
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sh_audio->samplesize=2;
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// decodes 65 byte -> 320 short
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// 1 sec: sh_audio->channels*sh_audio->samplerate samples
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// 1 frame: 320 samples
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if(sh_audio->format==0x31 || sh_audio->format==0x32){
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sh_audio->ds->ss_mul=65; sh_audio->ds->ss_div=320;
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} else {
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sh_audio->ds->ss_mul=33; sh_audio->ds->ss_div=160;
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}
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sh_audio->i_bps=sh_audio->ds->ss_mul*(sh_audio->channels*sh_audio->samplerate)/sh_audio->ds->ss_div; // 1:10
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return 1;
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}
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static int preinit(sh_audio_t *sh_audio)
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{
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sh_audio->audio_out_minsize=4*320;
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return 1;
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}
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static void uninit(sh_audio_t *sh)
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{
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}
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static int control(sh_audio_t *sh,int cmd,void* arg, ...)
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{
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return CONTROL_UNKNOWN;
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}
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static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
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{
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if(sh_audio->format==0x31 || sh_audio->format==0x32){
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unsigned char ibuf[65]; // 65 bytes / frame
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if(demux_read_data(sh_audio->ds,ibuf,65)!=65) return -1; // EOF
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XA_MSGSM_Decoder(ibuf,(unsigned short *) buf); // decodes 65 byte -> 320 short
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return 2*320;
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} else {
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unsigned char ibuf[33]; // 33 bytes / frame
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if(demux_read_data(sh_audio->ds,ibuf,33)!=33) return -1; // EOF
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XA_GSM_Decoder(ibuf,(unsigned short *) buf); // decodes 33 byte -> 160 short
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return 2*160;
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}
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}
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