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WASAPI: get channel layout from devices

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This commit is contained in:
Andrew Kelley 2015-08-12 17:50:36 -07:00
parent 75185d17d7
commit c420bf9e71
2 changed files with 57 additions and 3 deletions
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1
README.md
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@ -251,7 +251,6 @@ view `coverage/index.html` in a browser.
0. implement WASAPI (Windows) backend, get examples working
- list devices
- channel layout
- buffer duration
- raw mode
- watching

59
src/wasapi.cpp
View file

@ -47,7 +47,50 @@ static int from_lpwstr(LPWSTR lpwstr, char **out_str, int *out_str_len) {
return 0;
}
static SoundIoFormat from_wave_format(WAVEFORMATEXTENSIBLE *wave_format) {
static void from_wave_format_layout(WAVEFORMATEXTENSIBLE *wave_format, SoundIoChannelLayout *layout) {
assert(wave_format->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE);
layout->channel_count = 0;
if (wave_format->dwChannelMask & SPEAKER_FRONT_LEFT)
layout->channels[layout->channel_count++] = SoundIoChannelIdFrontLeft;
if (wave_format->dwChannelMask & SPEAKER_FRONT_RIGHT)
layout->channels[layout->channel_count++] = SoundIoChannelIdFrontRight;
if (wave_format->dwChannelMask & SPEAKER_FRONT_CENTER)
layout->channels[layout->channel_count++] = SoundIoChannelIdFrontCenter;
if (wave_format->dwChannelMask & SPEAKER_LOW_FREQUENCY)
layout->channels[layout->channel_count++] = SoundIoChannelIdLfe;
if (wave_format->dwChannelMask & SPEAKER_BACK_LEFT)
layout->channels[layout->channel_count++] = SoundIoChannelIdBackLeft;
if (wave_format->dwChannelMask & SPEAKER_BACK_RIGHT)
layout->channels[layout->channel_count++] = SoundIoChannelIdBackRight;
if (wave_format->dwChannelMask & SPEAKER_FRONT_LEFT_OF_CENTER)
layout->channels[layout->channel_count++] = SoundIoChannelIdFrontLeftCenter;
if (wave_format->dwChannelMask & SPEAKER_FRONT_RIGHT_OF_CENTER)
layout->channels[layout->channel_count++] = SoundIoChannelIdFrontRightCenter;
if (wave_format->dwChannelMask & SPEAKER_BACK_CENTER)
layout->channels[layout->channel_count++] = SoundIoChannelIdBackCenter;
if (wave_format->dwChannelMask & SPEAKER_SIDE_LEFT)
layout->channels[layout->channel_count++] = SoundIoChannelIdSideLeft;
if (wave_format->dwChannelMask & SPEAKER_SIDE_RIGHT)
layout->channels[layout->channel_count++] = SoundIoChannelIdSideRight;
if (wave_format->dwChannelMask & SPEAKER_TOP_CENTER)
layout->channels[layout->channel_count++] = SoundIoChannelIdTopCenter;
if (wave_format->dwChannelMask & SPEAKER_TOP_FRONT_LEFT)
layout->channels[layout->channel_count++] = SoundIoChannelIdTopFrontLeft;
if (wave_format->dwChannelMask & SPEAKER_TOP_FRONT_CENTER)
layout->channels[layout->channel_count++] = SoundIoChannelIdTopFrontCenter;
if (wave_format->dwChannelMask & SPEAKER_TOP_FRONT_RIGHT)
layout->channels[layout->channel_count++] = SoundIoChannelIdTopFrontRight;
if (wave_format->dwChannelMask & SPEAKER_TOP_BACK_LEFT)
layout->channels[layout->channel_count++] = SoundIoChannelIdTopBackLeft;
if (wave_format->dwChannelMask & SPEAKER_TOP_BACK_CENTER)
layout->channels[layout->channel_count++] = SoundIoChannelIdTopBackCenter;
if (wave_format->dwChannelMask & SPEAKER_TOP_BACK_RIGHT)
layout->channels[layout->channel_count++] = SoundIoChannelIdTopBackRight;
soundio_channel_layout_detect_builtin(layout);
}
static SoundIoFormat from_wave_format_format(WAVEFORMATEXTENSIBLE *wave_format) {
assert(wave_format->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE);
bool is_pcm = IsEqualGUID(wave_format->SubFormat, SOUNDIO_KSDATAFORMAT_SUBTYPE_PCM);
bool is_float = IsEqualGUID(wave_format->SubFormat, SOUNDIO_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT);
@ -201,6 +244,8 @@ static int refresh_devices(SoundIoPrivate *si) {
deinit_refresh_devices(&rd);
return SoundIoErrorNoMem;
}
rd.devices_info->default_input_index = -1;
rd.devices_info->default_output_index = -1;
for (int device_i = 0; device_i < device_count; device_i += 1) {
if (rd.mm_device)
@ -314,11 +359,21 @@ static int refresh_devices(SoundIoPrivate *si) {
rd.device->sample_rates[0].min = rd.device->sample_rate_current;
rd.device->sample_rates[0].max = rd.device->sample_rate_current;
rd.device->current_format = from_wave_format(rd.wave_format);
rd.device->current_format = from_wave_format_format(rd.wave_format);
rd.device->format_count = 1;
rd.device->formats = &dev->prealloc_format;
rd.device->formats[0] = rd.device->current_format;
from_wave_format_layout(rd.wave_format, &rd.device->current_layout);
rd.device->layout_count = 1;
rd.device->layouts = allocate<SoundIoChannelLayout>(1);
if (!rd.device->layouts) {
deinit_refresh_devices(&rd);
return SoundIoErrorNoMem;
}
rd.device->layouts[0] = rd.device->current_layout;