media-add-ons/mixer/AudioMixer.cpp

114 	// this is the default format used for all wildcard format SpecializeTo()s
118 	fDefaultFormat.u.raw_audio.format = media_raw_audio_format::B_AUDIO_FLOAT;
224 	// check that the specified format is reasonable for the specified destination, and
232 	// specialize to raw audio format if necessary
236 	// we require a raw audio format
246 	uint32 channel_count = output ? output->MediaOutput().format.u.raw_audio.channel_count : 0;
247 	float frame_rate = output ? output->MediaOutput().format.u.raw_audio.frame_rate : 0.0;
270 		out_input->format.Clear();
271 		out_input->format.type = B_MEDIA_RAW_AUDIO;
406 	if (out_input->format.u.raw_audio.frame_rate == 0) {
412 			? output->MediaOutput().format.u.raw_audio.frame_rate : 44100.0f;
413 		out_input->format.u.raw_audio.frame_rate = frame_rate;
482 	const media_format &format)
485 	// we will receive buffers in a different format
493 		TRACE("AudioMixer::FormatChanged: input format change refused\n");
497 	// TODO: We should not apply the format change at this point
502 	// tell core about format change
504 	fCore->InputFormatChanged(consumer.id, format.u.raw_audio);
516 	media_format *format)
521 	// is asking for our output format
526 	// we can produce any (wildcard) raw audio format
527 	format->Clear();
528 	format->type = B_MEDIA_RAW_AUDIO;
538 	// in the format are wildcards, and we have a specific requirement, adjust
547 	// specialize to raw audio format if necessary
551 	// we require a raw audio format
558 /*!	If the format isn't good, put a good format into *io_format and return error
559 	If format has wildcard, specialize to what you can do (and change).
560 	If you can change the format, return OK.
570 	// another format, we need to check if the format is acceptable and
576 		TRACE("AudioMixer::FormatChangeRequested: output format change refused\n");
607 		ERROR("AudioMixer::FormatChangeRequested: wrong format type\n");
641 	// apply format change
676 		out_output->format.Clear();
677 		out_output->format.type = B_MEDIA_RAW_AUDIO;
774 	const media_destination &where, media_format *format,
778 	// PrepareToConnect() is the second stage of format negotiations that
781 	// changed the proposed format.
782 	// It may also have left wildcards in the format. PrepareToConnect()
783 	// *must* fully specialize the format before returning!
786 	PRINT_FORMAT("AudioMixer::PrepareToConnect: suggested format", *format);
796 	// is the format acceptable?
797 	if (format->type != B_MEDIA_RAW_AUDIO
798 		&& format->type != B_MEDIA_UNKNOWN_TYPE) {
799 		PRINT_FORMAT("AudioMixer::PrepareToConnect: bad format", *format);
813 	// To avoid using the default format, we use one of
814 	// a) the format that it indicated as hint in the user_data,
815 	// b) the output format of the system audio mixer
816 	// c) the input format of the system DAC device
818 	if (format->u.raw_audio.channel_count == 0
819 		&& format->u.raw_audio.frame_rate < 1
820 		&& format->user_data_type == FORMAT_USER_DATA_TYPE
821 		&& *(uint32 *)&format->user_data[0] == FORMAT_USER_DATA_MAGIC_1
822 		&& *(uint32 *)&format->user_data[44] == FORMAT_USER_DATA_MAGIC_2) {
824 		uint32 channel_count = *(uint32 *)&format->user_data[4];
825 		float frame_rate = *(float *)&format->user_data[20];
827 			// format is good, use it
828 			format->u.raw_audio.channel_count = channel_count;
829 			format->u.raw_audio.frame_rate = frame_rate;
841 				// use mixer output format
842 				format->u.raw_audio.channel_count
843 					= out.format.u.raw_audio.channel_count;
844 				format->u.raw_audio.frame_rate
845 					= out.format.u.raw_audio.frame_rate;
849 				// use DAC input format
850 				format->u.raw_audio.channel_count
851 					= in.format.u.raw_audio.channel_count;
852 				format->u.raw_audio.frame_rate
853 					= in.format.u.raw_audio.frame_rate;
863 	format->SpecializeTo(&fDefaultFormat);
865 	PRINT_FORMAT("AudioMixer::PrepareToConnect: final format", *format);
872 	output.format = *format;
885 	const media_destination &dest, const media_format &format, char *io_name)
908 	// Switch our prefered format to have the same
910 	fDefaultFormat.u.raw_audio.frame_rate = format.u.raw_audio.frame_rate;
911 	fDefaultFormat.u.raw_audio.channel_count = format.u.raw_audio.channel_count;
923 	SetBufferDuration(buffer_duration(format.u.raw_audio));
989 	// Switch our prefered format back to default
1177 	uint32 size = fCore->Output()->MediaOutput().format.u.raw_audio.buffer_size;
1281 			case 80:	// Refuse output format changes
1285 			case 90:	// Refuse input format changes
1501 			case 80:	// Refuse output format changes
1506 			case 90:	// Refuse input format changes
1897 		B_TRANSLATE("Refuse output format changes"), B_ENABLE);
1899 		B_TRANSLATE("Refuse input format changes"), B_ENABLE);