cinelerra/audiodevice.h

   1 #ifndef AUDIODEVICE_H
   2 #define AUDIODEVICE_H
   3
   4 #include <fcntl.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <sys/ioctl.h>
   8 #include <unistd.h>
   9
  10 #include "audio1394.inc"
  11 #include "audioalsa.inc"
  12 #include "audioconfig.inc"
  13 #include "audiodevice.inc"
  14 #include "audioesound.inc"
  15 #include "audiooss.inc"
  16 #include "bctimer.h"
  17 #include "binary.h"
  18 #include "condition.inc"
  19 #include "dcoffset.inc"
  20 #include "device1394output.inc"
  21 #include "maxchannels.h"
  22 #include "mutex.inc"
  23 #include "preferences.inc"
  24 #include "recordgui.inc"
  25 #include "sema.inc"
  26 #include "thread.h"
  27 #include "vdevice1394.inc"
  28 #include "videodevice.inc"
  29
  30 class AudioLowLevel
  31 {
  32 public:
  33         AudioLowLevel(AudioDevice *device);
  34         virtual ~AudioLowLevel();
  35
  36         virtual int open_input() { return 1; };
  37         virtual int open_output() { return 1; };
  38         virtual int open_duplex() { return 1; };
  39         virtual int close_all() { return 1; };
  40         virtual int interrupt_crash() { return 0; };
  41         virtual int64_t device_position() { return -1; };
  42         virtual int write_buffer(char *buffer, int size) { return 1; };
  43         virtual int read_buffer(char *buffer, int size) { return 1; };
  44         virtual int flush_device() { return 1; };
  45         virtual int interrupt_playback() { return 1; };
  46
  47         AudioDevice *device;
  48 };
  49
  50
  51 class AudioDevice : public Thread
  52 {
  53 public:
  54         AudioDevice();
  55         ~AudioDevice();
  56
  57         friend class AudioALSA;
  58         friend class AudioOSS;
  59         friend class AudioESound;
  60         friend class Audio1394;
  61         friend class VDevice1394;
  62         friend class Device1394Output;
  63
  64         int open_input(AudioInConfig *config,
  65                 VideoInConfig *vconfig,
  66                 int rate,
  67                 int samples);
  68         int open_output(AudioOutConfig *config, int rate, int samples, int realtime);
  69         int open_duplex(AudioOutConfig *config, int rate, int samples, int realtime);
  70         int close_all();
  71         int reset_output();
  72         int restart();
  73
  74 // Specify a video device to pass data to if the same device handles video
  75         int set_vdevice(VideoDevice *vdevice);
  76
  77 // ================================ recording
  78
  79 // read from the record device
  80 // Conversion between double and int is done in AudioDevice
  81         int read_buffer(double **input,
  82                 int samples,
  83                 int channels,
  84                 int *over,
  85                 double *max,
  86                 int input_offset = 0);
  87         int set_record_dither(int value);
  88
  89         int stop_recording();
  90 // If a firewire device crashed
  91         int interrupt_crash();
  92
  93 // ================================== dc offset
  94
  95 // get and set offset
  96         int get_dc_offset(int *output, RecordGUIDCOffsetText **dc_offset_text);
  97 // set new offset
  98         int set_dc_offset(int dc_offset, int channel);
  99 // writes to whichever buffer is free or blocks until one becomes free
 100         int write_buffer(double **output, int samples, int channels = -1);
 101
 102 // play back buffers
 103         void run();
 104
 105 // After the last buffer is written call this to terminate.
 106 // A separate buffer for termination is required since the audio device can be
 107 // finished without writing a single byte
 108         int set_last_buffer();
 109
 110         int wait_for_startup();
 111 // wait for the playback thread to clean up
 112         int wait_for_completion();
 113
 114 // start the thread processing buffers
 115         int start_playback();
 116 // interrupt the playback thread
 117         int interrupt_playback();
 118         int set_play_dither(int status);
 119 // set software positioning on or off
 120         int set_software_positioning(int status = 1);
 121 // total samples played
 122 //  + audio offset from configuration if playback
 123         int64_t current_position();
 124 // If interrupted
 125         int get_interrupted();
 126         int get_device_buffer();
 127 // Used by video devices to share audio devices
 128         AudioLowLevel* get_lowlevel_out();
 129         AudioLowLevel* get_lowlevel_in();
 130
 131 private:
 132         int initialize();
 133 // Create a lowlevel driver out of the driver ID
 134         int create_lowlevel(AudioLowLevel* &lowlevel, int driver);
 135         int arm_buffer(int buffer, double **output, int samples, int channels);
 136         int get_obits();
 137         int get_ochannels();
 138         int get_ibits();
 139         int get_ichannels();
 140         int get_orate();
 141         int get_irate();
 142         int get_orealtime();
 143
 144         DC_Offset *dc_offset_thread;
 145 // Override configured parameters depending on the driver
 146         int in_samplerate, in_bits, in_channels, in_samples;
 147         int out_samplerate, out_bits, out_channels, out_samples;
 148         int duplex_samplerate, duplex_bits, duplex_channels, duplex_samples;
 149         int out_realtime, duplex_realtime;
 150
 151 // Access mode
 152         int r, w, d;
 153 // Samples per buffer
 154         int osamples, isamples, dsamples;
 155 // Video device to pass data to if the same device handles video
 156         VideoDevice *vdevice;
 157 // OSS < 3.9   --> playback before recording
 158 // OSS >= 3.9  --> doesn't matter
 159 // Got better synchronization by starting playback first
 160         int record_before_play;
 161         Condition *duplex_lock;
 162         Condition *startup_lock;
 163 // notify playback routines to test the duplex lock
 164         int duplex_init;
 165 // bits in output file
 166         int rec_dither;
 167 // 1 or 0
 168         int play_dither;
 169         int sharing;
 170
 171         int buffer_size[TOTAL_BUFFERS];
 172         int last_buffer[TOTAL_BUFFERS];    // not written to device
 173 // formatted buffers for output
 174         char *buffer[TOTAL_BUFFERS], *input_buffer;
 175         Sema *play_lock[TOTAL_BUFFERS];
 176         Sema *arm_lock[TOTAL_BUFFERS];
 177         Mutex *timer_lock;
 178         int arm_buffer_num;
 179
 180 // for position information
 181         int total_samples, last_buffer_size, position_correction;
 182         int device_buffer;
 183         int last_position;  // prevent the counter from going backwards
 184         Timer playback_timer, record_timer;
 185 // Current operation
 186         int is_playing_back, is_recording, global_timer_started, software_position_info;
 187         int interrupt;
 188         int driver;
 189
 190 // Multiple data paths can be opened simultaneously by RecordEngine
 191         AudioLowLevel *lowlevel_in, *lowlevel_out, *lowlevel_duplex;
 192
 193         AudioOutConfig *out_config;
 194         AudioInConfig *in_config;
 195 // Extra configuration if shared with video
 196         VideoInConfig *vconfig;
 197
 198         int thread_buffer_num, thread_result;
 199         int64_t total_samples_read;
 200 };
 201
 202
 203
 204 #endif