mirror of https://github.com/mpv-player/mpv
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#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 const 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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