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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"
extern int verbose;
static ao_info_t info =
{
"DXR3/H+ audio out",
"dxr3",
"David Holm <dholm@iname.com>",
""
};
LIBAO_EXTERN(dxr3)
// there are some globals:
// ao_samplerate
// ao_channels
// ao_format
// ao_bps
// ao_outburst
// ao_buffersize
//static char *em8300_ma="/dev/em8300_ma";
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("Can't open audio device /dev/em8300_ma -> nosound\n");
return 0;
}
fd_control = open( "/dev/em8300", O_WRONLY );
if( fd_control < 0 )
{
printf("Can't open em8300 control /dev/em8300\n");
return 0;
}
ao_format = format;
ioctl (fd_audio, SNDCTL_DSP_SETFMT, &ao_format);
if(format == AFMT_AC3 && ao_format != AFMT_AC3)
{
printf("Can't set audio device /dev/em8300_ma to AC3 output\n");
return 0;
}
printf("audio_setup: sample format: %s (requested: %s)\n",
audio_out_format_name(ao_format), audio_out_format_name(format));
if(format != AFMT_AC3)
{
ao_channels=channels-1;
ioctl (fd_audio, SNDCTL_DSP_STEREO, &ao_channels);
// set rate
ao_samplerate=rate;
ioctl (fd_audio, SNDCTL_DSP_SPEED, &ao_samplerate);
printf("audio_setup: using %d Hz samplerate (requested: %d)\n",ao_samplerate,rate);
}
if(ioctl(fd_audio, SNDCTL_DSP_GETOSPACE, &dxr3_buf_info)==-1){
int r=0;
printf("audio_setup: driver doesn't support SNDCTL_DSP_GETOSPACE :-(\n");
if(ioctl(fd_audio, SNDCTL_DSP_GETBLKSIZE, &r)==-1){
printf("audio_setup: %d bytes/frag (config.h)\n",ao_outburst);
} else {
ao_outburst=r;
printf("audio_setup: %d bytes/frag (GETBLKSIZE)\n",ao_outburst);
}
} else {
printf("audio_setup: frags: %3d/%d (%d bytes/frag) free: %6d\n",
dxr3_buf_info.fragments, dxr3_buf_info.fragstotal, dxr3_buf_info.fragsize, dxr3_buf_info.bytes);
if(ao_buffersize==-1) ao_buffersize=dxr3_buf_info.bytes;
ao_outburst=dxr3_buf_info.fragsize;
}
if(ao_buffersize==-1){
// Measuring buffer size:
void* data;
ao_buffersize=0;
#ifdef HAVE_AUDIO_SELECT
data=malloc(ao_outburst); memset(data,0,ao_outburst);
while(ao_buffersize<0x40000){
fd_set rfds;
struct timeval tv;
FD_ZERO(&rfds); FD_SET(fd_audio,&rfds);
tv.tv_sec=0; tv.tv_usec = 0;
if(!select(fd_audio+1, NULL, &rfds, NULL, &tv)) break;
write(fd_audio,data,ao_outburst);
ao_buffersize+=ao_outburst;
}
free(data);
if(ao_buffersize==0){
printf("\n *** Your audio driver DOES NOT support select() ***\n");
printf("Recompile mplayer with #undef HAVE_AUDIO_SELECT in config.h !\n\n");
return 0;
}
#endif
}
ioval = EM8300_PLAYMODE_PLAY;
ioctl( fd_control, EM8300_IOCTL_SET_PLAYMODE, &ioval );
close( fd_control );
return 1;
}
// close audio device
static void uninit()
{
ioctl(fd_audio, SNDCTL_DSP_RESET, NULL);
close( fd_audio );
}
// stop playing and empty buffers (for seeking/pause)
static void reset()
{
uninit();
if(fd_audio<0)
{
printf("\nFatal error: *** CANNOT RE-OPEN / RESET AUDIO DEVICE ***\n");
return;
}
ioctl (fd_audio, SNDCTL_DSP_SETFMT, &ao_format);
if(ao_format != AFMT_AC3)
{
ioctl (fd_audio, SNDCTL_DSP_STEREO, &ao_channels);
ioctl (fd_audio, SNDCTL_DSP_SPEED, &ao_samplerate);
}
}
// 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()
{
}
// return: how many bytes can be played without blocking
static int get_space()
{
if(ioctl(fd_audio, SNDCTL_DSP_GETOSPACE, &dxr3_buf_info)!=-1)
return (dxr3_buf_info.fragments*dxr3_buf_info.fragsize);
return 0;
}
static int play(void* data,int len,int flags)
{
ioctl( fd_audio, EM8300_IOCTL_AUDIO_SETPTS, &ao_pts );
return write(fd_audio,data,len);
}
// return: how many unplayed bytes are in the buffer
static int get_delay()
{
int r=0;
ioctl(fd_audio, SNDCTL_DSP_GETODELAY, &r);
return r;
}
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