cinelerra/audioesound.C

   1 #include "audioconfig.h"
   2 #include "audiodevice.h"
   3 #include "audioesound.h"
   4 #include "playbackconfig.h"
   5 #include "preferences.h"
   6 #include "recordconfig.h"
   7
   8 #ifdef HAVE_ESOUND
   9 #include <esd.h>
  10 #include <string.h>
  11
  12 AudioESound::AudioESound(AudioDevice *device) : AudioLowLevel(device)
  13 {
  14         esd_in = esd_out = esd_duplex = 0;
  15         esd_in_fd = esd_out_fd = esd_duplex_fd = 0;
  16 }
  17
  18 AudioESound::~AudioESound()
  19 {
  20 }
  21
  22
  23 int AudioESound::get_bit_flag(int bits)
  24 {
  25         switch(bits)
  26         {
  27                 case 8:
  28                         return ESD_BITS8;
  29                         break;
  30
  31                 case 16:
  32                         return ESD_BITS16;
  33                         break;
  34
  35                 case 24:
  36                         return ESD_BITS16;
  37                         break;
  38         }
  39 }
  40
  41 // No more than 2 channels in ESD
  42 int AudioESound::get_channels_flag(int channels)
  43 {
  44         switch(channels)
  45         {
  46                 case 1:
  47                         return ESD_MONO;
  48                         break;
  49
  50                 case 2:
  51                         return ESD_STEREO;
  52                         break;
  53
  54                 default:
  55                         return ESD_STEREO;
  56                         break;
  57         }
  58 }
  59
  60 char* AudioESound::translate_device_string(char *server, int port)
  61 {
  62 // ESD server
  63         if(port > 0 && strlen(server))
  64                 sprintf(device_string, "%s:%d", server, port);
  65         else
  66                 sprintf(device_string, "");
  67         return device_string;
  68 }
  69
  70 int AudioESound::open_input()
  71 {
  72         esd_format_t format = ESD_STREAM | ESD_RECORD;
  73
  74         device->in_channels = 2;
  75         device->in_bits = 16;
  76
  77         format |= get_channels_flag(device->in_channels);
  78         format |= get_bit_flag(device->in_bits);
  79
  80         if((esd_in = esd_open_sound(translate_device_string(device->in_config->esound_in_server, device->in_config->esound_in_port))) <= 0)
  81         {
  82                 fprintf(stderr, "AudioESound::open_input: open failed\n");
  83                 return 1;
  84         }
  85         esd_in_fd = esd_record_stream_fallback(format, device->in_samplerate,
  86                                 translate_device_string(device->out_config->esound_out_server, device->out_config->esound_out_port),
  87                                                 "Cinelerra");
  88         return 0;
  89 }
  90
  91 int AudioESound::open_output()
  92 {
  93         esd_format_t format = ESD_STREAM | ESD_PLAY;
  94
  95         device->out_channels = 2;
  96         device->out_bits = 16;
  97
  98         format |= get_channels_flag(device->out_channels);
  99         format |= get_bit_flag(device->out_bits);
 100
 101         if((esd_out = esd_open_sound(translate_device_string(device->out_config->esound_out_server, device->out_config->esound_out_port))) <= 0)
 102         {
 103                 fprintf(stderr, "AudioESound::open_output: open failed\n");
 104                 return 1;
 105         };
 106         esd_out_fd = esd_play_stream_fallback(format, device->out_samplerate,
 107                                 translate_device_string(device->out_config->esound_out_server, device->out_config->esound_out_port),
 108                                                 "Cinelerra");
 109
 110         device->device_buffer = esd_get_latency(esd_out);
 111         device->device_buffer *= device->out_bits / 8 * device->out_channels;
 112         return 0;
 113 }
 114
 115 // Open both input and output in ESD
 116 int AudioESound::open_duplex()
 117 {
 118         device->duplex_channels = 2;
 119         device->duplex_bits = 16;
 120         open_input();
 121         open_output();
 122         return 0;
 123 }
 124
 125 int AudioESound::close_all()
 126 {
 127         if(device->r || device->d)
 128         {
 129         close(esd_in_fd);
 130                 esd_close(esd_in);
 131         }
 132
 133         if(device->w || device->d)
 134         {
 135                 close(esd_out_fd);
 136                 esd_close(esd_out);
 137         }
 138 }
 139
 140 // No position on ESD
 141 int64_t AudioESound::device_position()
 142 {
 143         return -1;
 144 }
 145
 146 int AudioESound::read_buffer(char *buffer, int size)
 147 {
 148         if(esd_in_fd > 0)
 149                 return read(esd_in_fd, buffer, size);
 150         else
 151                 return 1;
 152 }
 153
 154 int AudioESound::write_buffer(char *buffer, int size)
 155 {
 156         if(esd_out_fd > 0)
 157                 return write(esd_out_fd, buffer, size);
 158         else
 159                 return 0;
 160 }
 161
 162 // No flushing in ESD
 163 int AudioESound::flush_device()
 164 {
 165         return 0;
 166 }
 167
 168 // No interrupting ESD
 169 int AudioESound::interrupt_playback()
 170 {
 171         return 0;
 172 }
 173
 174 #endif // HAVE_ESOUND
 175 /*
 176 //      Local Variables:
 177 //      mode: C++
 178 //      c-file-style: "linux"
 179 //      End:
 180 */