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ao/wasapi: make set_ao_format EX/EXTENSIBLE agnostic

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There is no guarantee that closestMatch returned by IsFormatSupported
is actually a WAVEFORMATEXTENSIBLE.

http://msdn.microsoft.com/en-us/library/windows/desktop/dd370876%28v=vs.85%29.aspx

We should therefore not blindly treat it as such.
This commit is contained in:
Kevin Mitchell 2014-12-01 00:46:15 -08:00
parent 146561cc91
commit 67c4117476
1 changed files with 28 additions and 14 deletions
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42
audio/out/ao_wasapi_utils.c
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@ -230,6 +230,21 @@ static bool waveformat_is_float(WAVEFORMATEX *wf)
}
}
static bool waveformat_is_pcm(WAVEFORMATEX *wf)
{
switch(wf->wFormatTag) {
case WAVE_FORMAT_EXTENSIBLE:
{
WAVEFORMATEXTENSIBLE *wformat = (WAVEFORMATEXTENSIBLE *)wf;
return !mp_GUID_compare(&mp_KSDATAFORMAT_SUBTYPE_PCM, &wformat->SubFormat);
}
case WAVE_FORMAT_PCM:
return true;
default:
return false;
}
}
static void waveformat_copy(WAVEFORMATEXTENSIBLE* dst, WAVEFORMATEX* src)
{
if ( src->wFormatTag == WAVE_FORMAT_EXTENSIBLE )
@ -238,38 +253,37 @@ static void waveformat_copy(WAVEFORMATEXTENSIBLE* dst, WAVEFORMATEX* src)
dst->Format = *src;
}
static bool set_ao_format(struct ao *ao,
WAVEFORMATEXTENSIBLE wformat)
static bool set_ao_format(struct ao *ao, WAVEFORMATEX *wf)
{
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
// explicitly disallow 8 bits - this will catch if the
// closestMatch returned by IsFormatSupported in try_format below returns
// a bit depth of less than 16
if (wformat.Format.wBitsPerSample < 16)
if (wf->wBitsPerSample < 16)
return false;
int format;
if ( !mp_GUID_compare(&mp_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, &wformat.SubFormat) ) {
if (waveformat_is_float(wf)){
format = AF_FORMAT_FLOAT;
} else if ( !mp_GUID_compare(&mp_KSDATAFORMAT_SUBTYPE_PCM, &wformat.SubFormat) ) {
} else if (waveformat_is_pcm(wf)) {
format = AF_FORMAT_S32;
} else {
MP_ERR(ao, "Unknown SubFormat %s\n", mp_GUID_to_str(&wformat.SubFormat));
MP_ERR(ao, "Unknown WAVEFORMAT\n");
return false;
}
// set the correct number of bits (the 32-bits assumed above may be wrong)
format = af_fmt_change_bits(format, wformat.Format.wBitsPerSample);
format = af_fmt_change_bits(format, wf->wBitsPerSample);
if (!format)
return false;
ao->samplerate = wformat.Format.nSamplesPerSec;
ao->bps = wformat.Format.nAvgBytesPerSec;
ao->samplerate = wf->nSamplesPerSec;
ao->bps = wf->nAvgBytesPerSec;
ao->format = format;
if (ao->channels.num != wformat.Format.nChannels)
mp_chmap_from_channels(&ao->channels, wformat.Format.nChannels);
if (ao->channels.num != wf->nChannels)
mp_chmap_from_channels(&ao->channels, wf->nChannels);
state->format = wformat;
waveformat_copy(&state->format, wf);
return true;
}
@ -301,7 +315,7 @@ static bool try_format(struct ao *ao,
}
if (hr == S_FALSE) {
if (set_ao_format(ao, wformat)) {
if (set_ao_format(ao, &wformat.Format)) {
MP_VERBOSE(ao, "Accepted as %dch %s @ %dhz\n",
ao->channels.num, af_fmt_to_str(ao->format), ao->samplerate);
@ -309,7 +323,7 @@ static bool try_format(struct ao *ao,
}
} if (hr == S_OK || (!state->opt_exclusive && hr == AUDCLNT_E_UNSUPPORTED_FORMAT)) {
// AUDCLNT_E_UNSUPPORTED_FORMAT here means "works in shared, doesn't in exclusive"
if (set_ao_format(ao, wformat)) {
if (set_ao_format(ao, &wformat.Format)) {
MP_VERBOSE(ao, "%dch %s @ %dhz accepted\n",
ao->channels.num, af_fmt_to_str(ao->format), samplerate);
return true;