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#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <inttypes.h>
#include <dxr2ioctl.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "bswap.h"
#include "audio_out.h"
#include "audio_out_internal.h"
#include "libaf/af_format.h"
static ao_info_t info =
{
"DXR2 audio output",
"dxr2",
"Tobias Diedrich <ranma@gmx.at>",
""
};
LIBAO_EXTERN(dxr2)
static int volume=19;
extern int dxr2_fd;
// to set/get/query special features/parameters
static int control(int cmd,void *arg){
switch(cmd){
case AOCONTROL_GET_VOLUME:
if(dxr2_fd > 0) {
ao_control_vol_t* vol = (ao_control_vol_t*)arg;
vol->left = vol->right = volume * 19.0 / 100.0;
return CONTROL_OK;
}
return CONTROL_ERROR;
case AOCONTROL_SET_VOLUME:
if(dxr2_fd > 0) {
dxr2_oneArg_t v;
float diff;
ao_control_vol_t* vol = (ao_control_vol_t*)arg;
// We need this trick because the volume stepping is often too small
diff = ((vol->left+vol->right) / 2 - (volume*19.0/100.0)) * 19.0 / 100.0;
v.arg = volume + (diff > 0 ? ceil(diff) : floor(diff));
if(v.arg > 19) v.arg = 19;
if(v.arg < 0) v.arg = 0;
if(v.arg != volume) {
volume = v.arg;
if( ioctl(dxr2_fd,DXR2_IOC_SET_AUDIO_VOLUME,&v) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_DXR2_SetVolFailed,volume);
return CONTROL_ERROR;
}
}
return CONTROL_OK;
}
return CONTROL_ERROR;
}
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){
if(dxr2_fd <= 0)
return 0;
ao_data.outburst=2048;
ao_data.samplerate=rate;
ao_data.channels=channels;
ao_data.buffersize=2048;
ao_data.bps=rate*4;
ao_data.format=format;
freq=rate;
switch(rate){
case 48000:
freq_id=DXR2_AUDIO_FREQ_48;
break;
case 96000:
freq_id=DXR2_AUDIO_FREQ_96;
break;
case 44100:
freq_id=DXR2_AUDIO_FREQ_441;
break;
case 32000:
freq_id=DXR2_AUDIO_FREQ_32;
break;
case 22050:
freq_id=DXR2_AUDIO_FREQ_2205;
break;
#ifdef DXR2_AUDIO_FREQ_24
// This is not yet in the dxr2 driver CVS
// you can get the patch at
// http://www.ranmachan.dyndns.org/~ranma/patches/dxr2.pcm1723.20020513
case 24000:
freq_id=DXR2_AUDIO_FREQ_24;
break;
case 64000:
freq_id=DXR2_AUDIO_FREQ_64;
break;
case 88200:
freq_id=DXR2_AUDIO_FREQ_882;
break;
#endif
default:
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_DXR2_UnsupSamplerate,rate);
return 0;
}
return 1;
}
// close audio device
static void uninit(int immed){
}
// 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()
{
}
extern void dxr2_send_packet(unsigned char* data,int len,int id,int timestamp);
extern void dxr2_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>32768) y=32768;
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){
// MPEG and AC3 don't work :-(
if(ao_data.format==AF_FORMAT_MPEG2)
dxr2_send_packet(data,len,0xC0,ao_data.pts);
else if(ao_data.format==AF_FORMAT_AC3)
dxr2_send_packet(data,len,0x80,ao_data.pts);
else {
int i;
//unsigned short *s=data;
uint16_t *s=data;
#ifndef WORDS_BIGENDIAN
for(i=0;i<len/2;i++) s[i] = bswap_16(s[i]);
#endif
dxr2_send_lpcm_packet(data,len,0xA0,ao_data.pts-10000,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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