// Create the Sequence Grabber Audio Channel
void QuicktimeLiveImageStream::createSequenceGrabberAudioChannel()
{
// Check capability and setting of Sequence Grabber
GDHandle origDevice;
CGrafPtr origPort;
// Create GWorld
GetGWorld (&origPort, &origDevice);
SetGWorld (m_gw, NULL); // set current graphics port to offscreen
// Setup
// Get a video channel
ComponentResult result = SGNewChannel (m_gSeqGrabber, SoundMediaType, &m_gSoundChannel);
if ((m_gSoundChannel != nil) && (result == noErr))
{
result = SGInitChannel(m_gSoundChannel, m_gSeqGrabber);
// result = SGSetChannelUsage (m_gSoundChannel, seqGrabPreview );
// Usage
if (g_s_use_sg_record)
result = SGSetChannelUsage (m_gSoundChannel, seqGrabRecord | seqGrabLowLatencyCapture);
else
{
result = SGSetChannelUsage (m_gSoundChannel, seqGrabPreview | seqGrabRecord | seqGrabLowLatencyCapture);
}
// Get
Str255 deviceName;
Str255 inputName;
short inputNumber;
result = SGGetChannelDeviceAndInputNames(m_gSoundChannel, deviceName, inputName, &inputNumber);
// Set
// OSG_DEBUG << "Setting up audio component from input prefs" << std::endl;
result = SGSetChannelDevice (m_gSoundChannel, m_soundDeviceIDStr);
result = SGSetChannelDeviceInput(m_gSoundChannel, m_soundDeviceInputID);
// Set the volume low to prevent feedback when we start the preview,
// in case the mic is anywhere near the speaker.
short volume = 0;
result = SGGetChannelVolume (m_gSoundChannel, &volume);
// result = SGSetChannelVolume (m_gSoundChannel, 255);
// Inform
result = SGChangedSource (m_gSeqGrabber, m_gSoundChannel);
}
else
{
OSG_FATAL << "Could not create SGNewChannel for Sound Channel" << std::endl;
}
// Set GWorld back
SetGWorld(origPort, origDevice);
}
// Create the Sequence Grabber Video Channel
void QuicktimeLiveImageStream::createSequenceGrabberVideoChannel()
{
// Check capability and setting of Sequence Grabber
GDHandle origDevice;
CGrafPtr origPort;
// Create GWorld
GetGWorld (&origPort, &origDevice);
SetGWorld (m_gw, NULL); // set current graphics port to offscreen
// Setup
// Get a video channel
ComponentResult result = SGNewChannel (m_gSeqGrabber, VideoMediaType, &m_gVideoChannel);
if ((m_gVideoChannel != nil) && (result == noErr))
{
result = SGInitChannel(m_gVideoChannel, m_gSeqGrabber);
Rect gActiveVideoRect;
// Usage
if (g_s_use_sg_record)
result = SGSetChannelUsage (m_gVideoChannel, seqGrabRecord | seqGrabLowLatencyCapture);
else
{
result = SGSetChannelUsage (m_gVideoChannel, seqGrabPreview);
}
// result = SGSetUseScreenBuffer(m_gVideoChannel, FALSE);
// Set
OSG_DEBUG << "Setting up vdig from input prefs" << std::endl;
result = SGSetChannelDevice ( m_gVideoChannel, m_videoDeviceIDStr);
result = SGSetChannelDeviceInput( m_gVideoChannel, m_videoDeviceInputID);
// result = SGSetChannelPlayFlags ( m_gVideoChannel, channelPlayFast | channelPlayHighQuality | channelPlayAllData);
result = SGSetChannelPlayFlags ( m_gVideoChannel, channelPlayFast );
VideoDigitizerComponent vdig = SGGetVideoDigitizerComponent(m_gVideoChannel);
VideoDigitizerError vid_err;
vid_err = VDSetInputStandard (vdig, palIn);
OSG_DEBUG << "Setup vdig from input prefs:" << std::endl;
print_video_component_capability(vdig);
result = SGVideoDigitizerChanged( m_gVideoChannel);
result = SGGetSrcVideoBounds ( m_gVideoChannel, &gActiveVideoRect);
result = SGSetChannelBounds ( m_gVideoChannel, &gActiveVideoRect);
result = SGChangedSource (m_gSeqGrabber, m_gVideoChannel);
Fixed frame_rate;
result = SGGetFrameRate (m_gVideoChannel, &frame_rate);
result = SGSetFrameRate (m_gVideoChannel, 100);
//
// Sound
/*
long sound_id;
Str255 sound_driver_name;
char* sound_driver_name_cstr;
vid_err = VDGetSoundInputSource(vdig, (long)m_videoDeviceInputID, &sound_id);
vid_err = VDGetSoundInputDriver(vdig, sound_driver_name);
sound_driver_name_cstr = pstr_printable(sound_driver_name);
OSG_DEBUG << "vdig sound driver name :" << sound_driver_name_cstr << std::endl;
OSG_DEBUG << "vdig sound driver id :" << sound_id << std::endl;
*/
}
else
{
OSG_FATAL << "Could not create SGNewChannel for Video Channel" << std::endl;
}
// Set GWorld back
SetGWorld(origPort, origDevice);
}
