Sound Destruction Problems

[edward850]

That's strange. I made an acid test for sound and it said it was playing back 4095 channels fine. In-fact, the System->Init line looks like it's finding which is higher (snd_channels or MAX_CHANNELS) and using that, which is more strange, because I can make FMOD run of 1 channel. I didn't test music, though.

Edit: I think this is actually an FMOD-ism. setSoftwareChannels and maxchannels in init() are two different values.

[Gez]

Yeah, it's definitely a weird line. You'd expect it to be used with MIN() rather than MAX()... Or MAX_CHANNELS should be renamed MIN_CHANNELS, either way.

Anyway it's in sound/fmodsound.cpp of course. Lines 914, and 959. It's part of FMODSoundRenderer::Init().

Code: Select all

	for (;;)
	{
		result = Sys->init(MAX(*snd_channels, MAX_CHANNELS), initflags, 0);
		if (result == FMOD_ERR_OUTPUT_CREATEBUFFER)
		{ 
			// Possible causes of a buffer creation failure:
			// 1. The speaker mode selected isn't supported by this soundcard. Force it to stereo.
			// 2. The output format is unsupported. Force it to 16-bit PCM.
			// 3. ???
			result = Sys->getSpeakerMode(&speakermode);
			if (result == FMOD_OK &&
				speakermode != FMOD_SPEAKERMODE_STEREO &&
				FMOD_OK == Sys->setSpeakerMode(FMOD_SPEAKERMODE_STEREO))
			{
				Printf(TEXTCOLOR_RED"  Buffer creation failed. Retrying with stereo output.\n");
				continue;
			}
			result = Sys->getSoftwareFormat(&samplerate, &format, NULL, NULL, &resampler, NULL);
			if (result == FMOD_OK &&
				format != FMOD_SOUND_FORMAT_PCM16 &&
				FMOD_OK == Sys->setSoftwareFormat(samplerate, FMOD_SOUND_FORMAT_PCM16, 0, 0, resampler))
			{
				Printf(TEXTCOLOR_RED"  Buffer creation failed. Retrying with PCM-16 output.\n");
				continue;
			}
		}
		else if (result == FMOD_ERR_NET_SOCKET_ERROR && (initflags & FMOD_INIT_ENABLE_PROFILE))
		{
			Printf(TEXTCOLOR_RED"  Could not create socket. Retrying without profiling.\n");
			initflags &= ~FMOD_INIT_ENABLE_PROFILE;
			continue;
		}
#ifdef _WIN32
		else if (result == FMOD_ERR_OUTPUT_INIT)
		{
			FMOD_OUTPUTTYPE output;
			result = Sys->getOutput(&output);
			if (result == FMOD_OK && output != FMOD_OUTPUTTYPE_DSOUND)
			{
				Printf(TEXTCOLOR_BLUE"  Init failed for output type %s. Retrying with DirectSound.\n",
					Enum_NameForNum(OutputNames, output));
				if (FMOD_OK == Sys->setOutput(FMOD_OUTPUTTYPE_DSOUND))
				{
					continue;
				}
			}
		}
#endif
		break;
	}
	if (result != FMOD_OK)
	{ // Initializing FMOD failed. Cry cry.
		Printf(TEXTCOLOR_ORANGE"  System::init returned error code %d\n", result);
		return false;
	}

[randi]

The 32 global channels limit is really antiquated

It sounds to me like they're describing the completely deliberate duplicate sound limiter. Changing the number of available sound channels isn't going to change a thing for them.

You'd expect it to be used with MIN() rather than MAX().

It's the maximum value you can set snd_channels to without having to restart the sound system. The game always allocates at least MAX_CHANNELS channels. Snd_channels is the number of those that can be actively mixed into the final output at once. Any excess between and_channels and MAX_CHANNELS will be automatically switched to virtual channels using volume-based prioritization. Does that answer your confusion?