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https://github.com/godotengine/godot
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Fix wasapi going silent when number of channels are not supported
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@ -74,21 +74,22 @@ Error AudioDriverWASAPI::init_device(bool reinit) {
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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// Since we're using WASAPI Shared Mode we can't control any of these, we just tag along
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channels = pwfex->nChannels;
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wasapi_channels = pwfex->nChannels;
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mix_rate = pwfex->nSamplesPerSec;
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format_tag = pwfex->wFormatTag;
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bits_per_sample = pwfex->wBitsPerSample;
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switch (channels) {
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switch (wasapi_channels) {
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case 2: // Stereo
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case 4: // Surround 3.1
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case 6: // Surround 5.1
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case 8: // Surround 7.1
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channels = wasapi_channels;
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break;
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default:
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ERR_PRINTS("WASAPI: Unsupported number of channels: " + itos(channels));
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ERR_FAIL_V(ERR_CANT_OPEN);
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WARN_PRINTS("WASAPI: Unsupported number of channels: " + itos(wasapi_channels));
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channels = 2;
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break;
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}
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@ -206,6 +207,35 @@ AudioDriver::SpeakerMode AudioDriverWASAPI::get_speaker_mode() const {
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return get_speaker_mode_by_total_channels(channels);
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}
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void AudioDriverWASAPI::write_sample(AudioDriverWASAPI *ad, BYTE *buffer, int i, int32_t sample) {
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if (ad->format_tag == WAVE_FORMAT_PCM) {
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switch (ad->bits_per_sample) {
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case 8:
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((int8_t *)buffer)[i] = sample >> 24;
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break;
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case 16:
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((int16_t *)buffer)[i] = sample >> 16;
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break;
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case 24:
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((int8_t *)buffer)[i * 3 + 2] = sample >> 24;
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((int8_t *)buffer)[i * 3 + 1] = sample >> 16;
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((int8_t *)buffer)[i * 3 + 0] = sample >> 8;
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break;
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case 32:
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((int32_t *)buffer)[i] = sample;
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break;
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}
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} else if (ad->format_tag == WAVE_FORMAT_IEEE_FLOAT) {
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((float *)buffer)[i] = (sample >> 16) / 32768.f;
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} else {
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ERR_PRINT("WASAPI: Unknown format tag");
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ad->exit_thread = true;
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}
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}
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void AudioDriverWASAPI::thread_func(void *p_udata) {
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AudioDriverWASAPI *ad = (AudioDriverWASAPI *)p_udata;
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@ -240,42 +270,21 @@ void AudioDriverWASAPI::thread_func(void *p_udata) {
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if (hr == S_OK) {
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// We're using WASAPI Shared Mode so we must convert the buffer
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if (ad->format_tag == WAVE_FORMAT_PCM) {
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switch (ad->bits_per_sample) {
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case 8:
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if (ad->channels == ad->wasapi_channels) {
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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((int8_t *)buffer)[i] = ad->samples_in[buffer_idx++] >> 24;
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}
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break;
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case 16:
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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((int16_t *)buffer)[i] = ad->samples_in[buffer_idx++] >> 16;
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}
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break;
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case 24:
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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int32_t sample = ad->samples_in[buffer_idx++];
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((int8_t *)buffer)[i * 3 + 2] = sample >> 24;
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((int8_t *)buffer)[i * 3 + 1] = sample >> 16;
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((int8_t *)buffer)[i * 3 + 0] = sample >> 8;
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}
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break;
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case 32:
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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((int32_t *)buffer)[i] = ad->samples_in[buffer_idx++];
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}
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break;
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}
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} else if (ad->format_tag == WAVE_FORMAT_IEEE_FLOAT) {
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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((float *)buffer)[i] = (ad->samples_in[buffer_idx++] >> 16) / 32768.f;
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ad->write_sample(ad, buffer, i, ad->samples_in[buffer_idx++]);
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}
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} else {
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ERR_PRINT("WASAPI: Unknown format tag");
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ad->exit_thread = true;
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for (unsigned int i = 0; i < write_frames; i++) {
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for (unsigned int j = 0; j < MIN(ad->channels, ad->wasapi_channels); j++) {
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ad->write_sample(ad, buffer, i * ad->wasapi_channels + j, ad->samples_in[buffer_idx++]);
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}
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if (ad->wasapi_channels > ad->channels) {
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for (unsigned int j = ad->channels; j < ad->wasapi_channels; j++) {
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ad->write_sample(ad, buffer, i * ad->wasapi_channels + j, 0);
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}
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}
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}
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}
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hr = ad->render_client->ReleaseBuffer(write_frames, 0);
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@ -380,6 +389,7 @@ AudioDriverWASAPI::AudioDriverWASAPI() {
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buffer_size = 0;
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channels = 0;
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wasapi_channels = 0;
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mix_rate = 0;
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buffer_frames = 0;
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@ -55,6 +55,7 @@ class AudioDriverWASAPI : public AudioDriver {
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unsigned int buffer_size;
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unsigned int channels;
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unsigned int wasapi_channels;
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int mix_rate;
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int buffer_frames;
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@ -62,6 +63,7 @@ class AudioDriverWASAPI : public AudioDriver {
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mutable bool exit_thread;
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bool active;
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_FORCE_INLINE_ void write_sample(AudioDriverWASAPI *ad, BYTE *buffer, int i, int32_t sample);
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static void thread_func(void *p_udata);
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Error init_device(bool reinit = false);
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