libao2/ao_dxr2.c

   1 #include <math.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <sys/ioctl.h>
   5 #include <inttypes.h>
   6 #include <dxr2ioctl.h>
   7 #include "config.h"
   8 #include "mp_msg.h"
   9 #include "help_mp.h"
  10 #include "libavutil/common.h"
  11 #include "mpbswap.h"
  12
  13 #include "audio_out.h"
  14 #include "audio_out_internal.h"
  15 #include "libaf/af_format.h"
  16 #include "libmpdemux/mpeg_packetizer.h"
  17
  18
  19 static ao_info_t info =
  20 {
  21         "DXR2 audio output",
  22         "dxr2",
  23         "Tobias Diedrich <ranma+mplayer@tdiedrich.de>",
  24         ""
  25 };
  26
  27 LIBAO_EXTERN(dxr2)
  28
  29 static int volume=19;
  30 static int last_freq_id = -1;
  31 extern int dxr2_fd;
  32
  33 // to set/get/query special features/parameters
  34 static int control(int cmd,void *arg){
  35   switch(cmd){
  36   case AOCONTROL_GET_VOLUME:
  37     if(dxr2_fd > 0) {
  38       ao_control_vol_t* vol = (ao_control_vol_t*)arg;
  39       vol->left = vol->right = volume * 19.0 / 100.0;
  40       return CONTROL_OK;
  41     }
  42     return CONTROL_ERROR;
  43   case AOCONTROL_SET_VOLUME:
  44     if(dxr2_fd > 0) {
  45       dxr2_oneArg_t v;
  46       float diff;
  47       ao_control_vol_t* vol = (ao_control_vol_t*)arg;
  48       // We need this trick because the volume stepping is often too small
  49       diff = ((vol->left+vol->right) / 2 - (volume*19.0/100.0)) * 19.0 / 100.0;
  50       v.arg = volume + (diff > 0 ? ceil(diff) : floor(diff));
  51       if(v.arg > 19) v.arg = 19;
  52       if(v.arg < 0) v.arg = 0;
  53       if(v.arg != volume) {
  54         volume = v.arg;
  55         if( ioctl(dxr2_fd,DXR2_IOC_SET_AUDIO_VOLUME,&v) < 0) {
  56           mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_DXR2_SetVolFailed,volume);
  57           return CONTROL_ERROR;
  58         }
  59       }
  60       return CONTROL_OK;
  61     }
  62     return CONTROL_ERROR;
  63   }
  64   return CONTROL_UNKNOWN;
  65 }
  66
  67 static int freq=0;
  68 static int freq_id=0;
  69
  70 // open & setup audio device
  71 // return: 1=success 0=fail
  72 static int init(int rate,int channels,int format,int flags){
  73
  74         if(dxr2_fd <= 0)
  75           return 0;
  76
  77         last_freq_id = -1;
  78
  79         ao_data.outburst=2048;
  80         ao_data.samplerate=rate;
  81         ao_data.channels=channels;
  82         ao_data.buffersize=2048;
  83         ao_data.bps=rate*4;
  84         ao_data.format=format;
  85         freq=rate;
  86
  87         switch(rate){
  88         case 48000:
  89                 freq_id=DXR2_AUDIO_FREQ_48;
  90                 break;
  91         case 96000:
  92                 freq_id=DXR2_AUDIO_FREQ_96;
  93                 break;
  94         case 44100:
  95                 freq_id=DXR2_AUDIO_FREQ_441;
  96                 break;
  97         case 32000:
  98                 freq_id=DXR2_AUDIO_FREQ_32;
  99                 break;
 100         case 22050:
 101                 freq_id=DXR2_AUDIO_FREQ_2205;
 102                 break;
 103 #ifdef DXR2_AUDIO_FREQ_24
 104         // This is not yet in the dxr2 driver CVS
 105         // you can get the patch at
 106         // http://www.tdiedrich.de/~ranma/patches/dxr2.pcm1723.20020513
 107         case 24000:
 108                 freq_id=DXR2_AUDIO_FREQ_24;
 109                 break;
 110         case 64000:
 111                 freq_id=DXR2_AUDIO_FREQ_64;
 112                 break;
 113         case 88200:
 114                 freq_id=DXR2_AUDIO_FREQ_882;
 115                 break;
 116 #endif
 117         default:
 118                 mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_DXR2_UnsupSamplerate,rate);
 119                 return 0;
 120         }
 121
 122         return 1;
 123 }
 124
 125 // close audio device
 126 static void uninit(int immed){
 127
 128 }
 129
 130 // stop playing and empty buffers (for seeking/pause)
 131 static void reset(void){
 132
 133 }
 134
 135 // stop playing, keep buffers (for pause)
 136 static void audio_pause(void)
 137 {
 138     // for now, just call reset();
 139     reset();
 140 }
 141
 142 // resume playing, after audio_pause()
 143 static void audio_resume(void)
 144 {
 145 }
 146
 147 extern int vo_pts;
 148 // return: how many bytes can be played without blocking
 149 static int get_space(void){
 150     float x=(float)(vo_pts-ao_data.pts)/90000.0;
 151     int y;
 152     if(x<=0) return 0;
 153     y=freq*4*x;y/=ao_data.outburst;y*=ao_data.outburst;
 154     if(y>32768) y=32768;
 155     return y;
 156 }
 157
 158 static void dxr2_send_lpcm_packet(unsigned char* data,int len,int id,unsigned int timestamp,int freq_id)
 159 {
 160   extern int write_dxr2(unsigned char *data, int len);
 161
 162   if(dxr2_fd < 0) {
 163     mp_msg(MSGT_AO,MSGL_ERR,"DXR2 fd is not valid\n");
 164     return;
 165   }
 166
 167   if(last_freq_id != freq_id) {
 168     ioctl(dxr2_fd, DXR2_IOC_SET_AUDIO_SAMPLE_FREQUENCY, &freq_id);
 169     last_freq_id = freq_id;
 170   }
 171
 172   send_mpeg_lpcm_packet (data, len, id, timestamp, freq_id, write_dxr2);
 173 }
 174
 175 // plays 'len' bytes of 'data'
 176 // it should round it down to outburst*n
 177 // return: number of bytes played
 178 static int play(void* data,int len,int flags){
 179   extern int write_dxr2(unsigned char *data, int len);
 180
 181   // MPEG and AC3 don't work :-(
 182     if(ao_data.format==AF_FORMAT_MPEG2)
 183       send_mpeg_ps_packet (data, len, 0xC0, ao_data.pts, 2, write_dxr2);
 184     else if(ao_data.format==AF_FORMAT_AC3)
 185       send_mpeg_ps_packet (data, len, 0x80, ao_data.pts, 2, write_dxr2);
 186     else {
 187         int i;
 188         //unsigned short *s=data;
 189         uint16_t *s=data;
 190 #ifndef WORDS_BIGENDIAN
 191         for(i=0;i<len/2;i++) s[i] = bswap_16(s[i]);
 192 #endif
 193         dxr2_send_lpcm_packet(data,len,0xA0,ao_data.pts-10000,freq_id);
 194     }
 195     return len;
 196 }
 197
 198 // return: delay in seconds between first and last sample in buffer
 199 static float get_delay(void){
 200
 201     return 0.0;
 202 }
 203