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Add SDL_GetAudioDeviceSpec.

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This API is supported by pipewire, pulseaudio, coreaudio, wasapi, and disk.
This commit is contained in:
Ethan Lee 2021-02-27 17:37:25 -05:00 • committed by Sam Lantinga
parent 00fabdde18
commit 67e8522d31
19 changed files with 256 additions and 67 deletions
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49
src/audio/wasapi/SDL_wasapi.c
View file

@ -117,10 +117,34 @@ WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid)
}
}
static SDL_AudioFormat
WaveFormatToSDLFormat(WAVEFORMATEX *waveformat)
{
if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_F32SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) {
return AUDIO_S16SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_S32SYS;
} else if (waveformat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
const WAVEFORMATEXTENSIBLE *ext = (const WAVEFORMATEXTENSIBLE *) waveformat;
if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_F32SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 16)) {
return AUDIO_S16SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_S32SYS;
}
}
SDL_assert(0 && "Unrecognized wFormatTag!");
return 0;
}
void
WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, LPCWSTR devid)
WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, WAVEFORMATEXTENSIBLE *fmt, LPCWSTR devid)
{
DevIdList *devidlist;
SDL_AudioSpec spec;
/* You can have multiple endpoints on a device that are mutually exclusive ("Speakers" vs "Line Out" or whatever).
In a perfect world, things that are unplugged won't be in this collection. The only gotcha is probably for
@ -149,7 +173,11 @@ WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, LPCWSTR devid)
devidlist->next = deviceid_list;
deviceid_list = devidlist;
SDL_AddAudioDevice(iscapture, devname, (void *) devid);
SDL_zero(spec);
spec.channels = fmt->Format.nChannels;
spec.freq = fmt->Format.nSamplesPerSec;
spec.format = WaveFormatToSDLFormat((WAVEFORMATEX *) fmt);
SDL_AddAudioDevice(iscapture, devname, &spec, (void *) devid);
}
static void
@ -539,22 +567,7 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
this->spec.channels = (Uint8) waveformat->nChannels;
/* Make sure we have a valid format that we can convert to whatever WASAPI wants. */
if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) {
wasapi_format = AUDIO_F32SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) {
wasapi_format = AUDIO_S16SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) {
wasapi_format = AUDIO_S32SYS;
} else if (waveformat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
const WAVEFORMATEXTENSIBLE *ext = (const WAVEFORMATEXTENSIBLE *) waveformat;
if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
wasapi_format = AUDIO_F32SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 16)) {
wasapi_format = AUDIO_S16SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
wasapi_format = AUDIO_S32SYS;
}
}
wasapi_format = WaveFormatToSDLFormat(waveformat);
while ((!valid_format) && (test_format)) {
if (test_format == wasapi_format) {