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#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include "../config.h"
#include "audio_out.h"
#include "audio_out_internal.h"
#include "afmt.h"
#ifdef HAVE_DVB
#include <ost/audio.h>
audioMixer_t dvb_mixer={255,255};
extern int vo_mpegpes_fd;
extern int vo_mpegpes_fd2;
#endif
static ao_info_t info =
{
#ifdef HAVE_DVB
"DVB audio output",
#else
"Mpeg-PES audio output",
#endif
"mpegpes",
"A'rpi",
""
};
LIBAO_EXTERN(mpegpes)
// to set/get/query special features/parameters
static int control(int cmd,int arg){
#ifdef HAVE_DVB
switch(cmd){
case AOCONTROL_GET_VOLUME:
if(vo_mpegpes_fd2>=0){
((ao_control_vol_t*)(arg))->left=dvb_mixer.volume_left/2.56;
((ao_control_vol_t*)(arg))->right=dvb_mixer.volume_right/2.56;
return CONTROL_OK;
}
return CONTROL_ERROR;
case AOCONTROL_SET_VOLUME:
if(vo_mpegpes_fd2>=0){
dvb_mixer.volume_left=((ao_control_vol_t*)(arg))->left*2.56;
dvb_mixer.volume_right=((ao_control_vol_t*)(arg))->right*2.56;
if(dvb_mixer.volume_left>255) dvb_mixer.volume_left=255;
if(dvb_mixer.volume_right>255) dvb_mixer.volume_right=255;
// printf("Setting DVB volume: %d ; %d \n",dvb_mixer.volume_left,dvb_mixer.volume_right);
if ( (ioctl(vo_mpegpes_fd2,AUDIO_SET_MIXER, &dvb_mixer) < 0)){
perror("DVB AUDIO SET MIXER: ");
return CONTROL_ERROR;
}
return CONTROL_OK;
}
return CONTROL_ERROR;
}
#endif
return CONTROL_UNKNOWN;
}
static int freq=0;
static int freq_id=0;
// open & setup audio device
// return: 1=success 0=fail
static int init(int rate,int channels,int format,int flags){
ao_data.outburst=2000;
ao_data.format=format;
freq=rate;
switch(rate){
case 48000: freq_id=0;break;
case 96000: freq_id=1;break;
case 44100: freq_id=2;break;
case 32000: freq_id=3;break;
default:
fprintf(stderr,"ao_mpegpes: %d Hz not supported, try to resample (RTFM)\n",rate);
return 0;
}
return 1;
}
// close audio device
static void uninit(){
}
// stop playing and empty buffers (for seeking/pause)
static void reset(){
}
// stop playing, keep buffers (for pause)
static void audio_pause()
{
// for now, just call reset();
reset();
}
// resume playing, after audio_pause()
static void audio_resume()
{
}
void send_pes_packet(unsigned char* data,int len,int id,int timestamp);
void send_lpcm_packet(unsigned char* data,int len,int id,int timestamp,int freq_id);
extern int vo_pts;
// return: how many bytes can be played without blocking
static int get_space(){
float x=(float)(vo_pts-ao_data.pts)/90000.0;
int y;
if(x<=0) return 0;
y=freq*4*x;y/=ao_data.outburst;y*=ao_data.outburst;
if(y>32000) y=32000;
// printf("diff: %5.3f -> %d \n",x,y);
return y;
}
// plays 'len' bytes of 'data'
// it should round it down to outburst*n
// return: number of bytes played
static int play(void* data,int len,int flags){
if(ao_data.format==AFMT_MPEG)
send_pes_packet(data,len,0x1C0,ao_data.pts);
else {
int i;
unsigned short *s=data;
// if(len>2000) len=2000;
// printf("ao_mpegpes: len=%d \n",len);
for(i=0;i<len/2;i++) s[i]=(s[i]>>8)|(s[i]<<8); // le<->be
send_lpcm_packet(data,len,0xA0,ao_data.pts,freq_id);
}
return len;
}
// return: delay in seconds between first and last sample in buffer
static float get_delay(){
return 0.0;
}
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