mirror of https://github.com/mpv-player/mpv
235 lines
6.2 KiB
C
235 lines
6.2 KiB
C
#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));
|
|
|
|
ao_data.channels=channels;
|
|
if(format != AFMT_AC3)
|
|
if(channels>2)
|
|
if( ioctl (fd_audio, SNDCTL_DSP_CHANNELS, &ao_data.channels) < 0 )
|
|
printf( "AO: [dxr3] Unable to set number of channels\n" );
|
|
else
|
|
{
|
|
int c = channels-1;
|
|
if( ioctl(fd_audio,SNDCTL_DSP_STEREO,&c) < 0)
|
|
printf( "AO: [dxr3] Unable to set number of channels for AC3\n" );
|
|
}
|
|
|
|
ao_data.bps = channels*rate;
|
|
if(format != AFMT_U8 && format != AFMT_S8)
|
|
ao_data.bps*=2;
|
|
ao_data.samplerate=rate;
|
|
if( ioctl (fd_audio, SNDCTL_DSP_SPEED, &ao_data.samplerate) < 0 )
|
|
{
|
|
printf( "AO: [dxr3] Unable to set samplerate\n" );
|
|
return 0;
|
|
}
|
|
if( rate < ao_data.samplerate )
|
|
{
|
|
ao_data.samplerate = 44100;
|
|
ioctl(fd_audio, SNDCTL_DSP_SPEED, &ao_data.samplerate);
|
|
if( ao_data.samplerate != 44100 )
|
|
{
|
|
printf( "AO: [dxr3] Unable to set samplerate\n" );
|
|
return 0;
|
|
}
|
|
printf("AO: [dxr3] Using %d Hz samplerate (requested: %d) (Upsampling)\n",ao_data.samplerate,rate);
|
|
ao_data.samplerate = rate;
|
|
}
|
|
else printf("AO: [dxr3] Using %d Hz samplerate (requested: %d)\n",ao_data.samplerate,rate);
|
|
|
|
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);
|
|
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;
|
|
}
|
|
|
|
// playes 'len' bytes of 'data'
|
|
// upsamples if samplerate < 44100
|
|
// return: number of bytes played
|
|
static int play(void* data,int len,int flags)
|
|
{
|
|
len /= ao_data.outburst;
|
|
return write(fd_audio,data,len*ao_data.outburst);
|
|
}
|
|
|
|
// return: delay in seconds between first and last sample in 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);
|
|
}
|
|
|