hvirtual/cinelerra/audio1394.C

Go to the documentation of this file.

#include "audio1394.h"
#include "playbackconfig.h"
#include "device1394input.h"
#include "device1394output.h"
#include "iec61883input.h"
#include "iec61883output.h"
#include "preferences.h"
#include "recordconfig.h"
#include "videoconfig.h"
#include "videodevice.h"

#define SAMPLES_PER_FRAME 2048

Audio1394::Audio1394(AudioDevice *device)
 : AudioLowLevel(device)
{
        initialize();
}


Audio1394::~Audio1394()
{
        close_all();
}

int Audio1394::initialize()
{
        input_thread = 0;
        output_thread = 0;
        input_iec = 0;
        output_iec = 0;
}

int Audio1394::open_input()
{
        int result = 0;
        if(!input_thread && !input_iec)
        {
// Lock the channels for the DV format
                device->in_channels = 2;
                device->in_bits = 16;
                bytes_per_sample = device->in_channels * device->in_bits / 8;


                if(device->driver == AUDIO_DV1394 ||
                        device->driver == AUDIO_1394)
                {
                        input_thread = new Device1394Input;
                        result = input_thread->open(device->in_config->firewire_path,
                                device->in_config->firewire_port, 
                                device->in_config->firewire_channel, 
                                30,
                                device->in_channels,
                                device->in_samplerate,
                                device->in_bits,
                                device->vconfig->w,
                                device->vconfig->h);
                }
                else
                {
                        input_iec = new IEC61883Input;
                        result = input_iec->open(device->in_config->firewire_port, 
                                device->in_config->firewire_channel, 
                                30,
                                device->in_channels,
                                device->in_samplerate,
                                device->in_bits,
                                device->vconfig->w,
                                device->vconfig->h);
                }




                if(result)
                {
                        delete input_thread;
                        input_thread = 0;
                        delete input_iec;
                        input_iec = 0;
                }
        }

        return result;
}

int Audio1394::open_output()
{
        if(!output_thread && !output_iec)
        {
// Lock the channels for the DV format
                device->out_channels = 2;
                device->out_bits = 16;
                bytes_per_sample = device->out_channels * device->out_bits / 8;


                if(device->driver == AUDIO_DV1394)
                {
                        output_thread = new Device1394Output(device);
                        output_thread->open(device->out_config->dv1394_path,
                                device->out_config->dv1394_port,
                                device->out_config->dv1394_channel,
                                30,
                                device->out_channels, 
                                device->out_bits, 
                                device->out_samplerate,
                                device->out_config->dv1394_syt);
                }
                else
                if(device->driver == AUDIO_1394)
                {
                        output_thread = new Device1394Output(device);
                        output_thread->open(device->out_config->firewire_path,
                                device->out_config->firewire_port,
                                device->out_config->firewire_channel,
                                30,
                                device->out_channels, 
                                device->out_bits, 
                                device->out_samplerate,
                                device->out_config->firewire_syt);
                }
                else
                {
                        output_iec = new IEC61883Output(device);
                        output_iec->open(device->out_config->firewire_port,
                                device->out_config->firewire_channel,
                                30,
                                device->out_channels, 
                                device->out_bits, 
                                device->out_samplerate,
                                device->out_config->firewire_syt);
                }
        }
        return 0;
}

int Audio1394::close_all()
{
        if(input_thread)
        {
                delete input_thread;
        }

        if(output_thread)
        {
                delete output_thread;
        }
        delete input_iec;
        delete output_iec;

        initialize();
        return 0;
}


int Audio1394::read_buffer(char *buffer, int bytes)
{
        if(input_thread)
        {
                input_thread->read_audio(buffer, bytes / bytes_per_sample);
        }
        else
        if(input_iec)
        {
                input_iec->read_audio(buffer, bytes / bytes_per_sample);
        }

        return 0;
}

int Audio1394::write_buffer(char *buffer, int bytes)
{
        if(output_thread)
                output_thread->write_samples(buffer, bytes / bytes_per_sample);
        else
        if(output_iec)
                output_iec->write_samples(buffer, bytes / bytes_per_sample);
        return 0;
}

int64_t Audio1394::device_position()
{
        if(output_thread)
                return output_thread->get_audio_position();
        else
        if(output_iec)
                return output_iec->get_audio_position();
        else
                return 0;
}


int Audio1394::flush_device()
{
        if(output_thread)
                output_thread->flush();
        else
        if(output_iec)
                output_iec->flush();
        return 0;
}

int Audio1394::interrupt_playback()
{
        if(output_thread)
                output_thread->interrupt();
        else
        if(output_iec)
                output_iec->interrupt();
        return 0;
}

---