RepoMirrors/mpv
1
0
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2025-03-08 07:08:12 +00:00
Code Issues Releases Wiki Activity

ao_wasapi: Support S/PDIF passthrough

Browse Source 
Entirely untested as this troper has no S/PDIF hardware.

Refuses trying any other format if we can't use passthrough, or we would
end up sending white noise at the user.
This commit is contained in:
Diogo Franco (Kovensky) 2013-07-21 13:11:44 -03:00 committed by wm4
parent bcb398ddb4
commit dcf38e0190
1 changed files with 45 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
audio/out/ao_wasapi.c
View File

@ -392,10 +392,55 @@ exit_label:
return ret;
}
static int try_passthrough(struct wasapi_state *state,
struct ao *const ao)
{
WAVEFORMATEXTENSIBLE wformat = {
.Format = {
.wFormatTag = WAVE_FORMAT_EXTENSIBLE,
.nChannels = ao->channels.num,
.nSamplesPerSec = ao->samplerate * 4,
.nAvgBytesPerSec = (ao->samplerate * 4) * (ao->channels.num * 2),
.nBlockAlign = ao->channels.num * 2,
.wBitsPerSample = 16,
.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX),
},
.Samples.wValidBitsPerSample = 16,
.dwChannelMask = mp_chmap_to_waveext(&ao->channels),
.SubFormat = local_KSDATAFORMAT_SUBTYPE_PCM,
};
wformat.SubFormat.Data1 = WAVE_FORMAT_DOLBY_AC3_SPDIF; // see INIT_WAVEFORMATEX_GUID macro
union WAVEFMT u;
u.extensible = &wformat;
HRESULT hr = IAudioClient_IsFormatSupported(state->pAudioClient,
state->share_mode,
u.ex, NULL);
if (!FAILED(hr)) {
state->format = wformat;
return 1;
}
return 0;
}
static int find_formats(struct ao *const ao)
{
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
if (AF_FORMAT_IS_IEC61937(ao->format)) {
if (try_passthrough(state, ao))
return 0;
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_ERR, "ao-wasapi: couldn't use passthrough!");
if (!state->opt_exclusive)
mp_msg(MSGT_AO, MSGL_ERR, " (try exclusive mode)");
mp_msg(MSGT_AO, MSGL_ERR, "\n");
LeaveCriticalSection(&state->print_lock);
return -1;
}
/* See if the format works as-is */
int bits = af_fmt2bits(ao->format);
/* don't try 8bits -- there are various 8bit modes other than PCM (*-law et al);