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#include <stdio.h>
#include <stdlib.h>
#include <linux/em8300.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "../config.h"
#include "afmt.h"
#include "audio_out.h"
#include "audio_out_internal.h"
void perror( const char *s );
#include <errno.h>
int sys_nerr;
extern int verbose;
static ao_info_t info =
{
"DXR3/H+ audio out",
"dxr3",
"David Holm <dholm@iname.com>",
""
};
LIBAO_EXTERN(dxr3)
static audio_buf_info dxr3_buf_info;
static int fd_control = 0, fd_audio = 0;
// to set/get/query special features/parameters
static int control(int cmd,int arg)
{
switch(cmd)
{
case AOCONTROL_QUERY_FORMAT:
return CONTROL_TRUE;
case AOCONTROL_GET_VOLUME:
case AOCONTROL_SET_VOLUME:
return CONTROL_OK;
return CONTROL_ERROR;
}
return CONTROL_UNKNOWN;
}
// open & setup audio device
// return: 1=success 0=fail
static int init(int rate,int channels,int format,int flags)
{
int ioval;
fd_audio = open( "/dev/em8300_ma", O_WRONLY );
if( fd_audio < 0 )
{
printf("AO: [dxr3] Can't open audio device /dev/em8300_ma -> nosound\n");
return 0;
}
fd_control = open( "/dev/em8300", O_WRONLY );
if( fd_control < 0 )
{
printf("AO: [dxr3] Can't open em8300 control /dev/em8300\n");
return 0;
}
ioctl(fd_audio, SNDCTL_DSP_RESET, NULL);
ao_data.format = format;
if( ioctl (fd_audio, SNDCTL_DSP_SETFMT, &ao_data.format) < 0 )
printf( "AO: [dxr3] Unable to set audio format\n" );
if(format == AFMT_AC3 && ao_data.format != AFMT_AC3)
{
printf("AO: [dxr3] Can't set audio device /dev/em8300_ma to AC3 output\n");
return 0;
}
printf("AO: [dxr3] Sample format: %s (requested: %s)\n",
audio_out_format_name(ao_data.format), audio_out_format_name(format));
if(format != AFMT_AC3)
{
ao_data.channels=channels-1;
if( ioctl (fd_audio, SNDCTL_DSP_STEREO, &ao_data.channels) < 0 )
printf( "AO: [dxr3] Unable to set number of channels\n" );
// set rate
ao_data.bps = (channels+1)*rate;
ao_data.samplerate=rate;
if( ioctl (fd_audio, SNDCTL_DSP_SPEED, &ao_data.samplerate) < 0 )
printf( "AO: [dxr3] Unable to set samplerate\n" );
printf("AO: [dxr3] Using %d Hz samplerate (requested: %d)\n",ao_data.samplerate,rate);
}
else ao_data.bps *= 2;
if( ioctl(fd_audio, SNDCTL_DSP_GETOSPACE, &dxr3_buf_info)==-1 )
{
int r=0;
printf("AO: [dxr3] Driver doesn't support SNDCTL_DSP_GETOSPACE :-(\n");
if( ioctl( fd_audio, SNDCTL_DSP_GETBLKSIZE, &r) ==-1 )
{
printf( "AO: [dxr3] %d bytes/frag (config.h)\n", ao_data.outburst );
}
else
{
ao_data.outburst=r;
printf( "AO: [dxr3] %d bytes/frag (GETBLKSIZE)\n",ao_data.outburst);
}
}
else
{
printf("AO: [dxr3] frags: %3d/%d (%d bytes/frag) free: %6d\n",
dxr3_buf_info.fragments+1, dxr3_buf_info.fragstotal, dxr3_buf_info.fragsize, dxr3_buf_info.bytes);
ao_data.buffersize=(dxr3_buf_info.bytes/2)-1;
ao_data.outburst=dxr3_buf_info.fragsize;
}
ioval = EM8300_PLAYMODE_PLAY;
if( ioctl( fd_control, EM8300_IOCTL_SET_PLAYMODE, &ioval ) < 0 )
printf( "AO: [dxr3] Unable to set playmode\n" );
close( fd_control );
return 1;
}
// close audio device
static void uninit()
{
printf( "AO: [dxr3] Uninitializing\n" );
if( ioctl(fd_audio, SNDCTL_DSP_RESET, NULL) < 0 )
printf( "AO: [dxr3] Unable to reset device\n" );
close( fd_audio );
close( fd_control ); /* Just in case */
}
// stop playing and empty buffers (for seeking/pause)
static void reset()
{
if( ioctl(fd_audio, SNDCTL_DSP_RESET, NULL) < 0 )
printf( "AO: [dxr3] Unable to reset device\n" );
}
// stop playing, keep buffers (for pause)
static void audio_pause()
{
int ioval;
reset();
fd_control = open( "/dev/em8300", O_WRONLY );
if( fd_control < 0 )
printf( "AO: [dxr3] Oops, unable to pause playback\n" );
else
{
ioval = EM8300_PLAYMODE_PAUSED;
if( ioctl( fd_control, EM8300_IOCTL_SET_PLAYMODE, &ioval ) < 0 )
printf( "AO: [dxr3] Unable to pause playback\n" );
close( fd_control );
}
}
// resume playing, after audio_pause()
static void audio_resume()
{
int ioval;
fd_control = open( "/dev/em8300", O_WRONLY );
if( fd_control < 0 )
printf( "AO: [dxr3] Oops, unable to resume playback\n" );
else
{
ioval = EM8300_PLAYMODE_PLAY;
if( ioctl( fd_control, EM8300_IOCTL_SET_PLAYMODE, &ioval ) < 0 )
printf( "AO: [dxr3] Unable to resume playback\n" );
close( fd_control );
}
}
// return: how many bytes can be played without blocking
static int get_space()
{
int space = 0;
if( ioctl(fd_audio, SNDCTL_DSP_GETODELAY, &space) < 0 )
{
printf( "AO: [dxr3] Unable to get unplayed bytes in buffer\n" );
return ao_data.outburst;
}
space = ao_data.buffersize - space;
space /= ao_data.outburst; /* This is a smart way of doing a fast modulo reduction */
space *= ao_data.outburst; /* fetched from ao_mpegpes.c */
return space;
}
static int play(void* data,int len,int flags)
{
if( ioctl( fd_audio, EM8300_IOCTL_AUDIO_SETPTS, &ao_data.pts ) < 0 )
printf( "AO: [dxr3] Unable to set PTS\n" );
return write(fd_audio,data,len);
}
// return: how many unplayed bytes are in the buffer
static float get_delay()
{
/* int r=0;
if( ioctl(fd_audio, SNDCTL_DSP_GETODELAY, &r) < 0 )
{
printf( "AO: [dxr3] Unable to get unplayed bytes in buffer\n" );
return ((float)ao_data.buffersize)/(float)ao_data.bps;
}
return (((float)r)/(float)ao_data.bps);*/
return 0.0;
}
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