media_node_framework/audio/AudioProducer.cpp

57 init_media_file(media_format format, BMediaTrack** _track)
82 		track = file->CreateTrack(&format, &info);
95 estimate_internal_latency(const media_format& format)
99 	int32 sampleSize = format.u.raw_audio.format
101 	int32 sampleCount = format.u.raw_audio.buffer_size / sampleSize;
155 	// initialize our preferred format object
157 	fPreferredFormat.u.raw_audio.format
169 		* (fPreferredFormat.u.raw_audio.format
182 	fOutput.format = fPreferredFormat;
229 	// This is the format we'll be returning (our preferred format)
241 AudioProducer::FormatProposal(const media_source& output, media_format* format)
251 	// Raw audio or wildcard type, either is okay by us. If the format is
252 	// anything else, overwrite it with our preferred format. Also, we only support
254 	if ((format->type != B_MEDIA_UNKNOWN_TYPE
255 			&& format->type != B_MEDIA_RAW_AUDIO)
256 		|| (format->u.raw_audio.format
257 				!= media_raw_audio_format::wildcard.format
258 			&& format->u.raw_audio.format
259 				!= fPreferredFormat.u.raw_audio.format)
260 		|| (format->u.raw_audio.byte_order
262 			&& format->u.raw_audio.byte_order
265 		*format = fPreferredFormat;
269 	format->type = B_MEDIA_RAW_AUDIO;
270 	format->u.raw_audio.format = fPreferredFormat.u.raw_audio.format;
271 	format->u.raw_audio.byte_order = fPreferredFormat.u.raw_audio.byte_order;
349 		size_t size = fOutput.format.u.raw_audio.buffer_size;
372 	const media_destination& where, media_format* format,
389 	status_t ret = _SpecializeFormat(format);
391 		TRACE("  -> format error: %s\n", strerror(ret));
397 	fOutput.format = *format;
400 		fSupplier->SetFormat(fOutput.format);
411 	 const media_destination& destination, const media_format& format,
421 		fOutput.format = fPreferredFormat;
426 	// format that we agreed on, and report our connection name again.
428 	fOutput.format = format;
431 	// tell our audio supplier about the format
434 		fSupplier->SetFormat(fOutput.format);
445 	size_t sampleSize = fOutput.format.u.raw_audio.format
448 		= fOutput.format.u.raw_audio.buffer_size / sampleSize;
449 	fInternalLatency = estimate_internal_latency(fOutput.format);
456 		* samplesPerBuffer / bigtime_t(fOutput.format.u.raw_audio.frame_rate
457 		* fOutput.format.u.raw_audio.channel_count);
468 		_AllocateBuffers(fOutput.format);
483 		fOutput.format = fPreferredFormat;
525 				= fOutput.format.u.raw_audio.format
528 				= fOutput.format.u.raw_audio.buffer_size / sampleSize;
530 				= samplesPerBuffer / fOutput.format.u.raw_audio.channel_count;
656 				size_t sampleSize = fOutput.format.u.raw_audio.format
659 				size_t nFrames = fOutput.format.u.raw_audio.buffer_size
660 					/ (sampleSize * fOutput.format.u.raw_audio.channel_count);
665 						/ double(fOutput.format.u.raw_audio.frame_rate));
689 AudioProducer::ChangeFormat(media_format* format)
693 	format->u.raw_audio.buffer_size
696 	status_t ret = _SpecializeFormat(format);
702 	ret = BBufferProducer::ProposeFormatChange(format, fOutput.destination);
709 		format);
715 	return _ChangeFormat(*format);
723 AudioProducer::_SpecializeFormat(media_format* format)
725 	// the format may not yet be fully specialized (the consumer might have
727 	// error if we don't support the requested format.
728 	if (format->type != B_MEDIA_RAW_AUDIO) {
732 	} else if (format->u.raw_audio.format
733 			!= fPreferredFormat.u.raw_audio.format) {
734 		TRACE("  format does not match\n");
738 	if (format->u.raw_audio.channel_count
740 		format->u.raw_audio.channel_count = 2;
744 	if (format->u.raw_audio.frame_rate
746 		format->u.raw_audio.frame_rate = 44100.0;
751 	if (format->u.raw_audio.buffer_size
757 		// format->u.raw_audio.frame_rate! (We assume frame rate is a multiple of
759 		format->u.raw_audio.buffer_size
760 			= uint32(format->u.raw_audio.frame_rate / 25.0)
761 				* format->u.raw_audio.channel_count
762 				* (format->u.raw_audio.format
766 			format->u.raw_audio.buffer_size *= 3;
774 AudioProducer::_ChangeFormat(const media_format& format)
776 	fOutput.format = format;
778 	// notify our audio supplier of the format change
780 		fSupplier->SetFormat(format);
782 	return _AllocateBuffers(format);
787 AudioProducer::_AllocateBuffers(const media_format& format)
795 	size_t size = format.u.raw_audio.buffer_size;
814 		fOutput.format.u.raw_audio.buffer_size, BufferDuration());
821 				fOutput.format.u.raw_audio.buffer_size, BufferDuration());
827 	size_t sampleSize = fOutput.format.u.raw_audio.format
829 	size_t numSamples = fOutput.format.u.raw_audio.buffer_size / sampleSize;
836 	buffer->SetSizeUsed(fOutput.format.u.raw_audio.buffer_size);
839 	int64 frameCount = numSamples / fOutput.format.u.raw_audio.channel_count;
841 		* 1000000.0 / fOutput.format.u.raw_audio.frame_rate);
843 		* 1000000.0 / fOutput.format.u.raw_audio.frame_rate);
860 	if (init_media_file(fOutput.format, &track) != NULL)
865 		&& fOutput.format.u.raw_audio.format
868 		int32 channels = fOutput.format.u.raw_audio.channel_count;