hvirtual/cinelerra/audio1394.C

   1 #ifdef HAVE_FIREWIRE
   2
   3
   4
   5
   6
   7 #include "audio1394.h"
   8 #include "playbackconfig.h"
   9 #include "device1394input.h"
  10 #include "device1394output.h"
  11 #include "preferences.h"
  12 #include "recordconfig.h"
  13 #include "videoconfig.h"
  14 #include "videodevice.h"
  15
  16 #define SAMPLES_PER_FRAME 2048
  17
  18 Audio1394::Audio1394(AudioDevice *device)
  19  : AudioLowLevel(device)
  20 {
  21         initialize();
  22 }
  23
  24
  25 Audio1394::~Audio1394()
  26 {
  27         close_all();
  28 }
  29
  30 int Audio1394::initialize()
  31 {
  32         input_thread = 0;
  33         output_thread = 0;
  34 }
  35
  36 int Audio1394::open_input()
  37 {
  38         int result = 0;
  39         if(!input_thread)
  40         {
  41 // Lock the channels for the DV format
  42                 device->in_channels = 2;
  43                 device->in_bits = 16;
  44                 bytes_per_sample = device->in_channels * device->in_bits / 8;
  45
  46
  47                 input_thread = new Device1394Input;
  48                 result = input_thread->open(device->in_config->firewire_port,
  49                         device->in_config->firewire_channel,
  50                         30,
  51                         device->in_channels,
  52                         device->in_samplerate,
  53                         device->in_bits);
  54                 if(result)
  55                 {
  56                         delete input_thread;
  57                         input_thread = 0;
  58                 }
  59         }
  60
  61         return result;
  62 }
  63
  64 int Audio1394::open_output()
  65 {
  66         if(!output_thread)
  67         {
  68 // Lock the channels for the DV format
  69                 device->out_channels = 2;
  70                 device->out_bits = 16;
  71                 bytes_per_sample = device->out_channels * device->out_bits / 8;
  72
  73                 output_thread = new Device1394Output;
  74
  75 //printf("Audio1394::open_output 1 %s\n", device->out_config->firewire_path);
  76                 output_thread->open(device->out_config->firewire_path,
  77                         device->out_config->firewire_port,
  78                         device->out_config->firewire_channel,
  79                         30,
  80                         device->out_channels,
  81                         device->out_bits,
  82                         device->out_samplerate,
  83                         device->out_config->firewire_syt,
  84                         device->out_config->firewire_use_dv1394);
  85         }
  86 }
  87
  88 int Audio1394::close_all()
  89 {
  90         if(input_thread)
  91         {
  92                 delete input_thread;
  93         }
  94
  95         if(output_thread)
  96         {
  97                 delete output_thread;
  98         }
  99
 100         initialize();
 101         return 0;
 102 }
 103
 104
 105 int Audio1394::read_buffer(char *buffer, int bytes)
 106 {
 107         if(input_thread)
 108         {
 109                 input_thread->read_audio(buffer, bytes / bytes_per_sample);
 110         }
 111
 112         return 0;
 113 }
 114
 115 int Audio1394::write_buffer(char *buffer, int bytes)
 116 {
 117         if(output_thread)
 118                 output_thread->write_samples(buffer, bytes / bytes_per_sample);
 119         return 0;
 120 }
 121
 122 int64_t Audio1394::device_position()
 123 {
 124         if(output_thread)
 125                 return output_thread->get_audio_position();
 126         else
 127                 return 0;
 128 }
 129
 130
 131 int Audio1394::flush_device()
 132 {
 133         if(output_thread)
 134                 output_thread->flush();
 135         return 0;
 136 }
 137
 138 int Audio1394::interrupt_playback()
 139 {
 140         if(output_thread)
 141                 output_thread->interrupt();
 142         return 0;
 143 }
 144
 145
 146
 147 #endif