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mpv/audio/out/ao_wasapi_utils.c
Kevin Mitchell 642f84f922 ao/wasapi: use atomic state variable instead of different events 
Unfortunately, because we have proxy objects (pAudioVolumeProxy,
pEndpointVolumeProxy, pSessionControlProxy) it looks like we still
have to use MsgWaitForMultipleObjects and watch for and dispatch
pending messages:

https://msdn.microsoft.com/en-us/library/windows/desktop/ms680112%28v=vs.85%29.aspx
2015-04-04 16:31:14 -07:00

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/*
* This file is part of mpv.
*
* Original author: Jonathan Yong <10walls@gmail.com>
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h>
#include <libavutil/common.h>
#include <windows.h>
#include <errors.h>
#include <ksguid.h>
#include <ksmedia.h>
#include <audioclient.h>
#include <endpointvolume.h>
#include <mmdeviceapi.h>
#include <avrt.h>
#include "audio/out/ao_wasapi_utils.h"
#include "audio/format.h"
#include "osdep/io.h"
#include "osdep/timer.h"
#define MIXER_DEFAULT_LABEL L"mpv - video player"
DEFINE_PROPERTYKEY(mp_PKEY_Device_FriendlyName,
0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20,
0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, 14);
DEFINE_PROPERTYKEY(mp_PKEY_Device_DeviceDesc,
0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20,
0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, 2);
// CEA 861 subformats
// should work on vista
DEFINE_GUID(mp_KSDATAFORMAT_SUBTYPE_IEC61937_DTS,
0x00000008, 0x0000, 0x0010, 0x80, 0x00,
0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
DEFINE_GUID(mp_KSDATAFORMAT_SUBTYPE_IEC61937_DOLBY_DIGITAL,
0x00000092, 0x0000, 0x0010, 0x80, 0x00,
0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
// might require 7+
DEFINE_GUID(mp_KSDATAFORMAT_SUBTYPE_IEC61937_AAC,
0x00000006, 0x0cea, 0x0010, 0x80, 0x00,
0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
DEFINE_GUID(mp_KSDATAFORMAT_SUBTYPE_IEC61937_MPEG3,
0x00000004, 0x0cea, 0x0010, 0x80, 0x00,
0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
DEFINE_GUID(mp_KSDATAFORMAT_SUBTYPE_IEC61937_DOLBY_DIGITAL_PLUS,
0x0000000a, 0x0cea, 0x0010, 0x80, 0x00,
0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
DEFINE_GUID(mp_KSDATAFORMAT_SUBTYPE_IEC61937_DTS_HD,
0x0000000b, 0x0cea, 0x0010, 0x80, 0x00,
0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
DEFINE_GUID(mp_KSDATAFORMAT_SUBTYPE_IEC61937_DOLBY_MLP,
0x0000000c, 0x0cea, 0x0010, 0x80, 0x00,
0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
struct wasapi_fmt_mapping {
const GUID *subtype;
int format;
};
const struct wasapi_fmt_mapping wasapi_fmt_table[] = {
{&mp_KSDATAFORMAT_SUBTYPE_IEC61937_DOLBY_DIGITAL, AF_FORMAT_S_AC3},
{&mp_KSDATAFORMAT_SUBTYPE_IEC61937_DTS, AF_FORMAT_S_DTS},
{&mp_KSDATAFORMAT_SUBTYPE_IEC61937_AAC, AF_FORMAT_S_AAC},
{&mp_KSDATAFORMAT_SUBTYPE_IEC61937_MPEG3, AF_FORMAT_S_MP3},
{&mp_KSDATAFORMAT_SUBTYPE_IEC61937_DOLBY_MLP, AF_FORMAT_S_TRUEHD},
{&mp_KSDATAFORMAT_SUBTYPE_IEC61937_DOLBY_DIGITAL_PLUS, AF_FORMAT_S_EAC3},
{&mp_KSDATAFORMAT_SUBTYPE_IEC61937_DTS_HD, AF_FORMAT_S_DTSHD},
{0}
};
static const GUID *format_to_subtype(int format)
{
if (AF_FORMAT_IS_SPECIAL(format)) {
for (int i = 0; wasapi_fmt_table[i].format; i++) {
if (wasapi_fmt_table[i].format == format)
return wasapi_fmt_table[i].subtype;
}
return &KSDATAFORMAT_SPECIFIER_NONE;
} else if (AF_FORMAT_IS_FLOAT(format)) {
return &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
}
return &KSDATAFORMAT_SUBTYPE_PCM;
}
// "solve" the under-determined inverse of format_to_subtype by
// assuming the input subtype is "special" (i.e. IEC61937)
static int special_subtype_to_format(const GUID *subtype) {
for (int i = 0; wasapi_fmt_table[i].format; i++) {
if (IsEqualGUID(subtype, wasapi_fmt_table[i].subtype))
return wasapi_fmt_table[i].format;
}
return 0;
}
char *mp_GUID_to_str_buf(char *buf, size_t buf_size, const GUID *guid)
{
snprintf(buf, buf_size,
"{%8.8x-%4.4x-%4.4x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x}",
(unsigned) guid->Data1, guid->Data2, guid->Data3,
guid->Data4[0], guid->Data4[1],
guid->Data4[2], guid->Data4[3],
guid->Data4[4], guid->Data4[5],
guid->Data4[6], guid->Data4[7]);
return buf;
}
char *mp_PKEY_to_str_buf(char *buf, size_t buf_size, const PROPERTYKEY *pkey)
{
buf = mp_GUID_to_str_buf(buf, buf_size, &pkey->fmtid);
size_t guid_len = strnlen(buf, buf_size);
snprintf(buf + guid_len, buf_size - guid_len, ",%"PRIu32, (uint32_t) pkey->pid);
return buf;
}
static char *wasapi_explain_err(const HRESULT hr)
{
#define E(x) case x : return # x ;
switch (hr) {
E(S_OK)
E(S_FALSE)
E(E_FAIL)
E(E_OUTOFMEMORY)
E(E_POINTER)
E(E_HANDLE)
E(E_NOTIMPL)
E(E_INVALIDARG)
E(E_PROP_ID_UNSUPPORTED)
E(REGDB_E_IIDNOTREG)
E(CO_E_NOTINITIALIZED)
E(AUDCLNT_E_NOT_INITIALIZED)
E(AUDCLNT_E_ALREADY_INITIALIZED)
E(AUDCLNT_E_WRONG_ENDPOINT_TYPE)
E(AUDCLNT_E_DEVICE_INVALIDATED)
E(AUDCLNT_E_NOT_STOPPED)
E(AUDCLNT_E_BUFFER_TOO_LARGE)
E(AUDCLNT_E_OUT_OF_ORDER)
E(AUDCLNT_E_UNSUPPORTED_FORMAT)
E(AUDCLNT_E_INVALID_SIZE)
E(AUDCLNT_E_DEVICE_IN_USE)
E(AUDCLNT_E_BUFFER_OPERATION_PENDING)
E(AUDCLNT_E_THREAD_NOT_REGISTERED)
E(AUDCLNT_E_EXCLUSIVE_MODE_NOT_ALLOWED)
E(AUDCLNT_E_ENDPOINT_CREATE_FAILED)
E(AUDCLNT_E_SERVICE_NOT_RUNNING)
E(AUDCLNT_E_EVENTHANDLE_NOT_EXPECTED)
E(AUDCLNT_E_EXCLUSIVE_MODE_ONLY)
E(AUDCLNT_E_BUFDURATION_PERIOD_NOT_EQUAL)
E(AUDCLNT_E_EVENTHANDLE_NOT_SET)
E(AUDCLNT_E_INCORRECT_BUFFER_SIZE)
E(AUDCLNT_E_BUFFER_SIZE_ERROR)
E(AUDCLNT_E_CPUUSAGE_EXCEEDED)
E(AUDCLNT_E_BUFFER_ERROR)
E(AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED)
E(AUDCLNT_E_INVALID_DEVICE_PERIOD)
E(AUDCLNT_E_INVALID_STREAM_FLAG)
E(AUDCLNT_E_ENDPOINT_OFFLOAD_NOT_CAPABLE)
E(AUDCLNT_E_RESOURCES_INVALIDATED)
E(AUDCLNT_S_BUFFER_EMPTY)
E(AUDCLNT_S_THREAD_ALREADY_REGISTERED)
E(AUDCLNT_S_POSITION_STALLED)
default:
return "<Unknown>";
}
#undef E
}
char *mp_HRESULT_to_str_buf(char *buf, size_t buf_size, HRESULT hr)
{
snprintf(buf, buf_size, "%s (0x%"PRIx32")",
wasapi_explain_err(hr), (uint32_t) hr);
return buf;
}
bool wasapi_fill_VistaBlob(wasapi_state *state)
{
if (!state)
goto exit_label;
state->VistaBlob.hAvrt = LoadLibraryW(L"avrt.dll");
if (!state->VistaBlob.hAvrt)
goto exit_label;
state->VistaBlob.pAvSetMmThreadCharacteristicsW =
(HANDLE (WINAPI *)(LPCWSTR, LPDWORD))
GetProcAddress(state->VistaBlob.hAvrt, "AvSetMmThreadCharacteristicsW");
if (!state->VistaBlob.pAvSetMmThreadCharacteristicsW)
goto exit_label;
state->VistaBlob.pAvRevertMmThreadCharacteristics =
(WINBOOL (WINAPI *)(HANDLE))
GetProcAddress(state->VistaBlob.hAvrt, "AvRevertMmThreadCharacteristics");
if (!state->VistaBlob.pAvRevertMmThreadCharacteristics)
goto exit_label;
return true;
exit_label:
if (state->VistaBlob.hAvrt) {
FreeLibrary(state->VistaBlob.hAvrt);
state->VistaBlob.hAvrt = NULL;
}
return false;
}
static void update_waveformat_datarate(WAVEFORMATEXTENSIBLE *wformat)
{
WAVEFORMATEX *wf = &wformat->Format;
wf->nBlockAlign = wf->nChannels * wf->wBitsPerSample / 8;
wf->nAvgBytesPerSec = wf->nSamplesPerSec * wf->nBlockAlign;
}
static void set_waveformat(WAVEFORMATEXTENSIBLE *wformat,
int format, WORD valid_bits,
DWORD samplerate, struct mp_chmap *channels)
{
wformat->Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
wformat->Format.nChannels = channels->num;
wformat->Format.nSamplesPerSec = samplerate;
wformat->Format.wBitsPerSample = af_fmt2bits(format);
wformat->Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
wformat->SubFormat = *format_to_subtype(format);
wformat->Samples.wValidBitsPerSample = valid_bits ? valid_bits : wformat->Format.wBitsPerSample;
wformat->dwChannelMask = mp_chmap_to_waveext(channels);
update_waveformat_datarate(wformat);
}
// This implicitly transforms all pcm formats to:
// interleaved / signed (except 8-bit is unsigned) / waveext channel order.
// "Special" formats should be exempt as they should already
// satisfy these properties.
static void set_waveformat_with_ao(WAVEFORMATEXTENSIBLE *wformat, struct ao *ao)
{
struct mp_chmap channels = ao->channels;
mp_chmap_reorder_to_waveext(&channels);
set_waveformat(wformat, ao->format, 0, ao->samplerate, &channels);
}
// other wformat parameters must already be set with set_waveformat
static void change_waveformat_samplerate(WAVEFORMATEXTENSIBLE *wformat,
DWORD samplerate)
{
wformat->Format.nSamplesPerSec = samplerate;
update_waveformat_datarate(wformat);
}
// other wformat parameters must already be set with set_waveformat
static void change_waveformat_channels(WAVEFORMATEXTENSIBLE *wformat,
struct mp_chmap *channels)
{
wformat->Format.nChannels = channels->num;
wformat->dwChannelMask = mp_chmap_to_waveext(channels);
update_waveformat_datarate(wformat);
}
static WORD waveformat_valid_bits(const WAVEFORMATEX *wf)
{
if (wf->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
WAVEFORMATEXTENSIBLE *wformat = (WAVEFORMATEXTENSIBLE *)wf;
return wformat->Samples.wValidBitsPerSample;
} else {
return wf->wBitsPerSample;
}
}
static int format_from_waveformat(WAVEFORMATEX *wf)
{
int format;
switch (wf->wFormatTag) {
case WAVE_FORMAT_EXTENSIBLE:
{
WAVEFORMATEXTENSIBLE *wformat = (WAVEFORMATEXTENSIBLE *)wf;
if (IsEqualGUID(&wformat->SubFormat, &KSDATAFORMAT_SUBTYPE_PCM)) {
format = wf->wBitsPerSample == 8 ? AF_FORMAT_U8 : AF_FORMAT_S32;
} else if (IsEqualGUID(&wformat->SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT)) {
format = AF_FORMAT_FLOAT;
} else {
format = special_subtype_to_format(&wformat->SubFormat);
}
break;
}
case WAVE_FORMAT_PCM:
format = wf->wBitsPerSample == 8 ? AF_FORMAT_U8 : AF_FORMAT_S32;
break;
case WAVE_FORMAT_IEEE_FLOAT:
format = AF_FORMAT_FLOAT;
break;
default:
return 0;
}
// https://msdn.microsoft.com/en-us/library/windows/hardware/ff538802%28v=vs.85%29.aspx:
// Since mpv doesn't have the notion of "valid bits", we just specify a
// format with the container size. The least significant, "invalid"
// bits will be excess precision ignored by wasapi.
// The change_bits operations should be a no-op for properly
// configured "special" formats, otherwise it will return 0.
return af_fmt_change_bits(format, wf->wBitsPerSample);
}
static bool chmap_from_waveformat(struct mp_chmap *channels, const WAVEFORMATEX *wf)
{
if (wf->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
WAVEFORMATEXTENSIBLE *wformat = (WAVEFORMATEXTENSIBLE *)wf;
mp_chmap_from_waveext(channels, wformat->dwChannelMask);
} else {
mp_chmap_from_channels(channels, wf->nChannels);
}
if (channels->num != wf->nChannels) {
mp_chmap_from_str(channels, bstr0("empty"));
return false;
}
return true;
}
static char *waveformat_to_str_buf(char *buf, size_t buf_size, WAVEFORMATEX *wf)
{
struct mp_chmap channels;
chmap_from_waveformat(&channels, wf);
unsigned valid_bits = waveformat_valid_bits(wf);
char validstr[12] = "";
if (valid_bits != wf->wBitsPerSample)
snprintf(validstr, sizeof(validstr), " (%u valid)", valid_bits);
snprintf(buf, buf_size, "%s %s%s @ %uhz",
mp_chmap_to_str(&channels), af_fmt_to_str(format_from_waveformat(wf)),
validstr, (unsigned) wf->nSamplesPerSec);
return buf;
}
#define waveformat_to_str(wf) waveformat_to_str_buf((char[40]){0}, 40, (wf))
static void waveformat_copy(WAVEFORMATEXTENSIBLE* dst, WAVEFORMATEX* src)
{
if (src->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
*dst = *(WAVEFORMATEXTENSIBLE *)src;
} else {
dst->Format = *src;
}
}
static bool set_ao_format(struct ao *ao, WAVEFORMATEX *wf, AUDCLNT_SHAREMODE share_mode)
{
struct wasapi_state *state = ao->priv;
int format = format_from_waveformat(wf);
if (!format) {
MP_ERR(ao, "Unable to construct sample format from WAVEFORMAT %s\n",
waveformat_to_str(wf));
return false;
}
// Do not touch the ao for passthrough, just assume that we set WAVEFORMATEX correctly.
if (!AF_FORMAT_IS_SPECIAL(format)) {
struct mp_chmap channels;
if (!chmap_from_waveformat(&channels, wf)) {
MP_ERR(ao, "Unable to construct channel map from WAVEFORMAT %s\n",
waveformat_to_str(wf));
return false;
}
ao->samplerate = wf->nSamplesPerSec;
ao->format = format;
ao->channels = channels;
}
waveformat_copy(&state->format, wf);
state->share_mode = share_mode;
return true;
}
static bool try_format_exclusive(struct ao *ao, WAVEFORMATEXTENSIBLE *wformat)
{
struct wasapi_state *state = ao->priv;
MP_VERBOSE(ao, "Trying %s (exclusive)\n", waveformat_to_str(&wformat->Format));
HRESULT hr = IAudioClient_IsFormatSupported(state->pAudioClient,
AUDCLNT_SHAREMODE_EXCLUSIVE,
&wformat->Format, NULL);
if (hr != AUDCLNT_E_UNSUPPORTED_FORMAT)
EXIT_ON_ERROR(hr);
return hr == S_OK;
exit_label:
MP_ERR(state, "Error testing exclusive format: %s\n", mp_HRESULT_to_str(hr));
return false;
}
static bool search_sample_formats(struct ao *ao, WAVEFORMATEXTENSIBLE *wformat,
int samplerate, struct mp_chmap *channels)
{
// some common bit depths / container sizes (requests welcome)
int try[] = {AF_FORMAT_DOUBLE, AF_FORMAT_FLOAT, AF_FORMAT_S32,
AF_FORMAT_S24 , AF_FORMAT_S32 , AF_FORMAT_S16,
AF_FORMAT_U8 , 0};
unsigned valid[] = {0 , 0, 0,
0 , 24, 0,
0 };
for (int i = 0; try[i]; i++) {
set_waveformat(wformat, try[i], valid[i], samplerate, channels);
if (try_format_exclusive(ao, wformat))
return true;
}
wformat->Format.wBitsPerSample = 0;
return false;
}
static bool search_samplerates(struct ao *ao, WAVEFORMATEXTENSIBLE *wformat,
struct mp_chmap *channels)
{
// try list of typical sample rates (requests welcome)
int try[] = {8000, 11025, 16000, 22050, 32000, 44100, 48000, 88200, 96000,
176400, 192000, 352800, 384000, 0};
// get a list of supported rates
int n = 0;
int supported[MP_ARRAY_SIZE(try)] = {0};
wformat->Format.wBitsPerSample = 0;
for (int i = 0; try[i]; i++) {
if (!wformat->Format.wBitsPerSample) {
if (search_sample_formats(ao, wformat, try[i], channels))
supported[n++] = try[i];
} else {
change_waveformat_samplerate(wformat, try[i]);
if (try_format_exclusive(ao, wformat))
supported[n++] = try[i];
}
}
for (int i = 0; supported[i]; i++) {
// first choose the lowest integer multiple of the sample rate
if (!(supported[i] % ao->samplerate)) {
change_waveformat_samplerate(wformat, supported[i]);
return true;
}
}
// then choose the highest supported (if any)
if (n) {
change_waveformat_samplerate(wformat, supported[n-1]);
return true;
}
// otherwise, this is probably an unsupported channel map
wformat->Format.nSamplesPerSec = 0;
return false;
}
static bool search_channels(struct ao *ao, WAVEFORMATEXTENSIBLE *wformat)
{
struct wasapi_state *state = ao->priv;
struct mp_chmap_sel chmap_sel = {.tmp = state};
struct mp_chmap entry;
// put common layouts first so that we find sample rate/format early
char *channel_layouts[] =
{"mono", "stereo", "2.1", "4.0", "5.0", "5.1", "6.1", "7.1",
"3.0", "3.0(back)",
"quad", "quad(side)", "3.1",
"5.0(side)", "4.1",
"5.1(side)", "6.0", "6.0(front)", "hexagonal"
"6.1(back)", "6.1(front)", "7.0", "7.0(front)",
"7.1(wide)", "7.1(wide-side)", "7.1(rear)", "octagonal", NULL};
wformat->Format.nSamplesPerSec = 0;
for (int j = 0; channel_layouts[j]; j++) {
mp_chmap_from_str(&entry, bstr0(channel_layouts[j]));
if (!wformat->Format.nSamplesPerSec) {
if (search_samplerates(ao, wformat, &entry)) {
mp_chmap_sel_add_map(&chmap_sel, &entry);
MP_VERBOSE(ao, "%s is supported\n", waveformat_to_str(&wformat->Format));
}
} else {
change_waveformat_channels(wformat, &entry);
if (try_format_exclusive(ao, wformat)) {
mp_chmap_sel_add_map(&chmap_sel, &entry);
MP_VERBOSE(ao, "%s is supported\n", mp_chmap_to_str(&entry));
}
}
}
entry = ao->channels;
if (ao_chmap_sel_adjust(ao, &chmap_sel, &entry)){
change_waveformat_channels(wformat, &entry);
return true;
}
MP_ERR(ao, "No suitable audio format found\n");
return false;
}
static bool find_formats_exclusive(struct ao *ao, bool do_search)
{
WAVEFORMATEXTENSIBLE wformat;
set_waveformat_with_ao(&wformat, ao);
// Try the requested format as is. If that doesn't work, and the
// do_search argument is set, do the pcm format search.
if (!try_format_exclusive(ao, &wformat) &&
(!do_search || !search_channels(ao, &wformat)))
return false;
if (!set_ao_format(ao, &wformat.Format, AUDCLNT_SHAREMODE_EXCLUSIVE))
return false;
MP_VERBOSE(ao, "Accepted as %s %s @ %dhz (exclusive)\n",
mp_chmap_to_str(&ao->channels),
af_fmt_to_str(ao->format), ao->samplerate);
return true;
}
static bool find_formats_shared(struct ao *ao)
{
struct wasapi_state *state = ao->priv;
WAVEFORMATEXTENSIBLE wformat;
set_waveformat_with_ao(&wformat, ao);
MP_VERBOSE(ao, "Trying %s (shared)\n", waveformat_to_str(&wformat.Format));
WAVEFORMATEX *closestMatch;
HRESULT hr = IAudioClient_IsFormatSupported(state->pAudioClient,
AUDCLNT_SHAREMODE_SHARED,
&wformat.Format, &closestMatch);
if (hr != AUDCLNT_E_UNSUPPORTED_FORMAT)
EXIT_ON_ERROR(hr);
switch (hr) {
case S_OK:
break;
case S_FALSE:
waveformat_copy(&wformat, closestMatch);
CoTaskMemFree(closestMatch);
MP_VERBOSE(ao, "Closest match is %s\n",
waveformat_to_str(&wformat.Format));
break;
default:
hr = IAudioClient_GetMixFormat(state->pAudioClient, &closestMatch);
EXIT_ON_ERROR(hr);
waveformat_copy(&wformat, closestMatch);
MP_VERBOSE(ao, "Fallback to mix format %s\n",
waveformat_to_str(&wformat.Format));
CoTaskMemFree(closestMatch);
}
if (!set_ao_format(ao, &wformat.Format, AUDCLNT_SHAREMODE_SHARED))
return false;
MP_VERBOSE(ao, "Accepted as %s %s @ %dhz (shared)\n",
mp_chmap_to_str(&ao->channels),
af_fmt_to_str(ao->format), ao->samplerate);
return true;
exit_label:
MP_ERR(state, "Error finding shared mode format: %s\n", mp_HRESULT_to_str(hr));
return false;
}
static bool find_formats(struct ao *ao)
{
struct wasapi_state *state = ao->priv;
if (state->opt_exclusive) {
// If exclusive is requested, try the requested format (which
// might be passthrough). If that fails, do a pcm format
// search.
return find_formats_exclusive(ao, true);
} else if (AF_FORMAT_IS_SPECIAL(ao->format)) {
// If a passthrough format is requested, but exclusive mode
// was not explicitly set, try only the requested passthrough
// format in exclusive mode. Fall back on shared mode if that
// fails without doing the exclusive pcm format search.
if (find_formats_exclusive(ao, false))
return true;
}
// Default is to use shared mode
return find_formats_shared(ao);
}
static HRESULT init_clock(struct wasapi_state *state) {
HRESULT hr = IAudioClient_GetService(state->pAudioClient,
&IID_IAudioClock,
(void **)&state->pAudioClock);
EXIT_ON_ERROR(hr);
hr = IAudioClock_GetFrequency(state->pAudioClock, &state->clock_frequency);
EXIT_ON_ERROR(hr);
QueryPerformanceFrequency(&state->qpc_frequency);
atomic_store(&state->sample_count, 0);
MP_VERBOSE(state, "IAudioClock::GetFrequency gave a frequency of %"PRIu64".\n",
(uint64_t) state->clock_frequency);
return S_OK;
exit_label:
MP_ERR(state, "Error obtaining the audio device's timing: %s\n",
mp_HRESULT_to_str(hr));
return hr;
}
static HRESULT init_session_display(struct wasapi_state *state) {
wchar_t path[MAX_PATH+12] = {0};
HRESULT hr = IAudioClient_GetService(state->pAudioClient,
&IID_IAudioSessionControl,
(void **)&state->pSessionControl);
EXIT_ON_ERROR(hr);
GetModuleFileNameW(NULL, path, MAX_PATH);
lstrcatW(path, L",-IDI_ICON1");
hr = IAudioSessionControl_SetDisplayName(state->pSessionControl, MIXER_DEFAULT_LABEL, NULL);
EXIT_ON_ERROR(hr);
hr = IAudioSessionControl_SetIconPath(state->pSessionControl, path, NULL);
EXIT_ON_ERROR(hr);
return S_OK;
exit_label:
MP_WARN(state, "Error setting audio session display name: %s\n",
mp_HRESULT_to_str(hr));
return S_OK; // No reason to abort initialization.
}
static HRESULT fix_format(struct ao *ao)
{
struct wasapi_state *state = ao->priv;
REFERENCE_TIME devicePeriod, bufferDuration, bufferPeriod;
MP_DBG(state, "IAudioClient::GetDevicePeriod\n");
HRESULT hr = IAudioClient_GetDevicePeriod(state->pAudioClient,&devicePeriod, NULL);
MP_VERBOSE(state, "Device period: %.2g ms\n", (double) devicePeriod / 10000.0 );
/* integer multiple of device period close to 50ms */
bufferPeriod = bufferDuration = ceil(50.0 * 10000.0 / devicePeriod) * devicePeriod;
/* handle unsupported buffer size */
/* hopefully this shouldn't happen because of the above integer device period */
/* http://msdn.microsoft.com/en-us/library/windows/desktop/dd370875%28v=vs.85%29.aspx */
int retries=0;
reinit:
if (state->share_mode == AUDCLNT_SHAREMODE_SHARED)
bufferPeriod = 0;
MP_DBG(state, "IAudioClient::Initialize\n");
hr = IAudioClient_Initialize(state->pAudioClient,
state->share_mode,
AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
bufferDuration,
bufferPeriod,
&(state->format.Format),
NULL);
/* something about buffer sizes on Win7 */
if (hr == AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED) {
if (retries > 0) {
EXIT_ON_ERROR(hr);
} else {
retries ++;
}
MP_VERBOSE(state, "IAudioClient::Initialize negotiation failed with %s, used %lld * 100ns\n",
mp_HRESULT_to_str(hr), bufferDuration);
IAudioClient_GetBufferSize(state->pAudioClient, &state->bufferFrameCount);
bufferPeriod = bufferDuration =
(REFERENCE_TIME) ((10000.0 * 1000 / state->format.Format.nSamplesPerSec *
state->bufferFrameCount) + 0.5);
IAudioClient_Release(state->pAudioClient);
state->pAudioClient = NULL;
hr = IMMDeviceActivator_Activate(state->pDevice,
&IID_IAudioClient, CLSCTX_ALL,
NULL, (void **)&state->pAudioClient);
goto reinit;
}
EXIT_ON_ERROR(hr);
MP_DBG(state, "IAudioClient::Initialize pRenderClient\n");
hr = IAudioClient_GetService(state->pAudioClient,
&IID_IAudioRenderClient,
(void **)&state->pRenderClient);
EXIT_ON_ERROR(hr);
MP_DBG(state, "IAudioClient::Initialize pAudioVolume\n");
hr = IAudioClient_GetService(state->pAudioClient,
&IID_ISimpleAudioVolume,
(void **)&state->pAudioVolume);
EXIT_ON_ERROR(hr);
MP_DBG(state, "IAudioClient::Initialize IAudioClient_SetEventHandle\n");
hr = IAudioClient_SetEventHandle(state->pAudioClient, state->hWake);
EXIT_ON_ERROR(hr);
MP_DBG(state, "IAudioClient::Initialize IAudioClient_GetBufferSize\n");
hr = IAudioClient_GetBufferSize(state->pAudioClient,
&state->bufferFrameCount);
EXIT_ON_ERROR(hr);
ao->device_buffer = state->bufferFrameCount;
state->buffer_block_size = state->format.Format.nChannels *
state->format.Format.wBitsPerSample / 8 *
state->bufferFrameCount;
bufferDuration =
(REFERENCE_TIME) ((10000.0 * 1000 / state->format.Format.nSamplesPerSec *
state->bufferFrameCount) + 0.5);
MP_VERBOSE(state, "Buffer frame count: %"PRIu32" (%.2g ms)\n",
state->bufferFrameCount, (double) bufferDuration / 10000.0 );
hr = init_clock(state);
EXIT_ON_ERROR(hr);
hr = init_session_display(state);
EXIT_ON_ERROR(hr);
if (state->VistaBlob.hAvrt) {
state->hTask =
state->VistaBlob.pAvSetMmThreadCharacteristicsW(L"Pro Audio", &state->taskIndex);
}
MP_VERBOSE(state, "Format fixed. Using %lld byte buffer block size\n",
(long long) state->buffer_block_size);
return S_OK;
exit_label:
MP_ERR(state, "Error initializing device: %s\n", mp_HRESULT_to_str(hr));
return hr;
}
static char* get_device_id(IMMDevice *pDevice) {
if (!pDevice)
return NULL;
LPWSTR devid = NULL;
char *idstr = NULL;
HRESULT hr = IMMDevice_GetId(pDevice, &devid);
EXIT_ON_ERROR(hr);
idstr = mp_to_utf8(NULL, devid);
if (strstr(idstr, "{0.0.0.00000000}.")) {
char *stripped = talloc_strdup(NULL, idstr + strlen("{0.0.0.00000000}."));
talloc_free(idstr);
idstr = stripped;
}
exit_label:
SAFE_RELEASE(devid, CoTaskMemFree(devid));
return idstr;
}
static char* get_device_name(IMMDevice *pDevice) {
if (!pDevice)
return NULL;
IPropertyStore *pProps = NULL;
char *namestr = NULL;
HRESULT hr = IMMDevice_OpenPropertyStore(pDevice, STGM_READ, &pProps);
EXIT_ON_ERROR(hr);
PROPVARIANT devname;
PropVariantInit(&devname);
hr = IPropertyStore_GetValue(pProps, &mp_PKEY_Device_FriendlyName, &devname);
EXIT_ON_ERROR(hr);
namestr = mp_to_utf8(NULL, devname.pwszVal);
exit_label:
PropVariantClear(&devname);
SAFE_RELEASE(pProps, IPropertyStore_Release(pProps));
return namestr;
}
static char* get_device_desc(IMMDevice *pDevice) {
if (!pDevice)
return NULL;
IPropertyStore *pProps = NULL;
char *desc = NULL;
HRESULT hr = IMMDevice_OpenPropertyStore(pDevice, STGM_READ, &pProps);
EXIT_ON_ERROR(hr);
PROPVARIANT devdesc;
PropVariantInit(&devdesc);
hr = IPropertyStore_GetValue(pProps, &mp_PKEY_Device_DeviceDesc, &devdesc);
EXIT_ON_ERROR(hr);
desc = mp_to_utf8(NULL, devdesc.pwszVal);
exit_label:
PropVariantClear(&devdesc);
SAFE_RELEASE(pProps, IPropertyStore_Release(pProps));
return desc;
}
// frees *idstr
static int device_id_match(char *idstr, char *candidate) {
if (idstr == NULL || candidate == NULL)
return 0;
int found = 0;
#define FOUND(x) do { found = (x); goto end; } while(0)
if (strcmp(idstr, candidate) == 0)
FOUND(1);
if (strstr(idstr, "{0.0.0.00000000}.")) {
char *start = idstr + strlen("{0.0.0.00000000}.");
if (strcmp(start, candidate) == 0)
FOUND(1);
}
#undef FOUND
end:
talloc_free(idstr);
return found;
}
void wasapi_list_devs(struct ao *ao, struct ao_device_list *list)
{
struct wasapi_state *state = ao->priv;
IMMDeviceCollection *pDevices = NULL;
IMMDevice *pDevice = NULL;
char *name = NULL, *id = NULL;
HRESULT hr = IMMDeviceEnumerator_EnumAudioEndpoints(state->pEnumerator, eRender,
DEVICE_STATE_ACTIVE, &pDevices);
EXIT_ON_ERROR(hr);
int count;
hr = IMMDeviceCollection_GetCount(pDevices, &count);
EXIT_ON_ERROR(hr);
if (count > 0)
MP_VERBOSE(ao, "Output devices:\n");
for (int i = 0; i < count; i++) {
hr = IMMDeviceCollection_Item(pDevices, i, &pDevice);
EXIT_ON_ERROR(hr);
name = get_device_name(pDevice);
id = get_device_id(pDevice);
if (!id) {
hr = E_FAIL;
EXIT_ON_ERROR(hr);
}
char *safe_name = name ? name : "";
ao_device_list_add(list, ao, &(struct ao_device_desc){id, safe_name});
MP_VERBOSE(ao, "#%d, GUID: \'%s\', name: \'%s\'\n", i, id, safe_name);
talloc_free(name);
talloc_free(id);
SAFE_RELEASE(pDevice, IMMDevice_Release(pDevice));
}
SAFE_RELEASE(pDevices, IMMDeviceCollection_Release(pDevices));
return;
exit_label:
MP_ERR(ao, "Error enumerating devices: %s\n", mp_HRESULT_to_str(hr));
talloc_free(name);
talloc_free(id);
SAFE_RELEASE(pDevice, IMMDevice_Release(pDevice));
SAFE_RELEASE(pDevices, IMMDeviceCollection_Release(pDevices));
}
static HRESULT load_default_device(struct ao *ao, IMMDeviceEnumerator* pEnumerator,
IMMDevice **ppDevice)
{
HRESULT hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(pEnumerator,
eRender, eMultimedia,
ppDevice);
EXIT_ON_ERROR(hr);
char *id = get_device_id(*ppDevice);
MP_VERBOSE(ao, "Default device ID: %s\n", id);
talloc_free(id);
return S_OK;
exit_label:
MP_ERR(ao , "Error loading default device: %s\n", mp_HRESULT_to_str(hr));
return hr;
}
static HRESULT find_and_load_device(struct ao *ao, IMMDeviceEnumerator* pEnumerator,
IMMDevice **ppDevice, char *search)
{
HRESULT hr;
IMMDeviceCollection *pDevices = NULL;
IMMDevice *pTempDevice = NULL;
LPWSTR deviceID = NULL;
char *end;
int devno = strtol(search, &end, 10);
char *devid = NULL;
if (end == search || *end)
devid = search;
int search_err = 0;
if (devid == NULL) {
hr = IMMDeviceEnumerator_EnumAudioEndpoints(pEnumerator, eRender,
DEVICE_STATE_ACTIVE, &pDevices);
EXIT_ON_ERROR(hr);
int count;
IMMDeviceCollection_GetCount(pDevices, &count);
if (devno >= count) {
MP_ERR(ao, "No device #%d\n", devno);
} else {
MP_VERBOSE(ao, "Finding device #%d\n", devno);
hr = IMMDeviceCollection_Item(pDevices, devno, &pTempDevice);
EXIT_ON_ERROR(hr);
hr = IMMDevice_GetId(pTempDevice, &deviceID);
EXIT_ON_ERROR(hr);
MP_VERBOSE(ao, "Found device #%d\n", devno);
}
} else {
hr = IMMDeviceEnumerator_EnumAudioEndpoints(pEnumerator, eRender,
DEVICE_STATE_ACTIVE|DEVICE_STATE_UNPLUGGED,
&pDevices);
EXIT_ON_ERROR(hr);
int count;
IMMDeviceCollection_GetCount(pDevices, &count);
MP_VERBOSE(ao, "Finding device %s\n", devid);
IMMDevice *prevDevice = NULL;
for (int i = 0; i < count; i++) {
hr = IMMDeviceCollection_Item(pDevices, i, &pTempDevice);
EXIT_ON_ERROR(hr);
if (device_id_match(get_device_id(pTempDevice), devid)) {
hr = IMMDevice_GetId(pTempDevice, &deviceID);
EXIT_ON_ERROR(hr);
break;
}
char *desc = get_device_desc(pTempDevice);
if (strstr(desc, devid)) {
if (deviceID) {
char *name;
if (!search_err) {
MP_ERR(ao, "Multiple matching devices found\n");
name = get_device_name(prevDevice);
MP_ERR(ao, "%s\n", name);
talloc_free(name);
search_err = 1;
}
name = get_device_name(pTempDevice);
MP_ERR(ao, "%s\n", name);
talloc_free(name);
}
hr = IMMDevice_GetId(pTempDevice, &deviceID);
prevDevice = pTempDevice;
}
talloc_free(desc);
SAFE_RELEASE(pTempDevice, IMMDevice_Release(pTempDevice));
}
if (deviceID == NULL)
MP_ERR(ao, "Could not find device %s\n", devid);
}
SAFE_RELEASE(pTempDevice, IMMDevice_Release(pTempDevice));
SAFE_RELEASE(pDevices, IMMDeviceCollection_Release(pDevices));
if (deviceID == NULL || search_err) {
hr = E_NOTFOUND;
} else {
MP_VERBOSE(ao, "Loading device %S\n", deviceID);
hr = IMMDeviceEnumerator_GetDevice(pEnumerator, deviceID, ppDevice);
if (FAILED(hr))
MP_ERR(ao, "Could not load requested device\n");
}
exit_label:
SAFE_RELEASE(pTempDevice, IMMDevice_Release(pTempDevice));
SAFE_RELEASE(pDevices, IMMDeviceCollection_Release(pDevices));
CoTaskMemFree(deviceID);
return hr;
}
HRESULT wasapi_setup_proxies(struct wasapi_state *state) {
HRESULT hr;
#define UNMARSHAL(type, to, from) do { \
hr = CoGetInterfaceAndReleaseStream((from), &(type), (void **)&(to)); \
(from) = NULL; \
EXIT_ON_ERROR(hr); \
} while (0)
UNMARSHAL(IID_ISimpleAudioVolume, state->pAudioVolumeProxy, state->sAudioVolume);
UNMARSHAL(IID_IAudioEndpointVolume, state->pEndpointVolumeProxy, state->sEndpointVolume);
UNMARSHAL(IID_IAudioSessionControl, state->pSessionControlProxy, state->sSessionControl);
#undef UNMARSHAL
return S_OK;
exit_label:
MP_ERR(state, "Error reading COM proxy: %s\n", mp_HRESULT_to_str(hr));
return hr;
}
void wasapi_release_proxies(wasapi_state *state) {
SAFE_RELEASE(state->pAudioVolumeProxy, IUnknown_Release(state->pAudioVolumeProxy));
SAFE_RELEASE(state->pEndpointVolumeProxy, IUnknown_Release(state->pEndpointVolumeProxy));
SAFE_RELEASE(state->pSessionControlProxy, IUnknown_Release(state->pSessionControlProxy));
}
static HRESULT create_proxies(struct wasapi_state *state) {
HRESULT hr;
#define MARSHAL(type, to, from) do { \
hr = CreateStreamOnHGlobal(NULL, TRUE, &(to)); \
EXIT_ON_ERROR(hr); \
hr = CoMarshalInterThreadInterfaceInStream(&(type), \
(IUnknown *)(from), \
&(to)); \
EXIT_ON_ERROR(hr); \
} while (0)
MARSHAL(IID_ISimpleAudioVolume, state->sAudioVolume, state->pAudioVolume);
MARSHAL(IID_IAudioEndpointVolume, state->sEndpointVolume, state->pEndpointVolume);
MARSHAL(IID_IAudioSessionControl, state->sSessionControl, state->pSessionControl);
return S_OK;
exit_label:
MP_ERR(state, "Error creating COM proxy: %s\n", mp_HRESULT_to_str(hr));
return hr;
}
static void destroy_proxies(struct wasapi_state *state) {
SAFE_RELEASE(state->sAudioVolume, IUnknown_Release(state->sAudioVolume));
SAFE_RELEASE(state->sEndpointVolume, IUnknown_Release(state->sEndpointVolume));
SAFE_RELEASE(state->sSessionControl, IUnknown_Release(state->sSessionControl));
}
void wasapi_dispatch(struct ao *ao)
{
MP_DBG(ao, "Dispatch\n");
/* dispatch any possible pending messages */
MSG msg;
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
DispatchMessage(&msg);
}
HRESULT wasapi_thread_init(struct ao *ao)
{
struct wasapi_state *state = ao->priv;
MP_DBG(ao, "Init wasapi thread\n");
int64_t retry_wait = 1;
retry:
state->initial_volume = -1.0;
HRESULT hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
&IID_IMMDeviceEnumerator, (void **)&state->pEnumerator);
EXIT_ON_ERROR(hr);
char *device = state->opt_device;
if (!device || !device[0])
device = ao->device;
if (!device || !device[0]) {
hr = load_default_device(ao, state->pEnumerator, &state->pDevice);
} else {
hr = find_and_load_device(ao, state->pEnumerator, &state->pDevice, device);
}
EXIT_ON_ERROR(hr);
char *name = get_device_name(state->pDevice);
MP_VERBOSE(ao, "Device loaded: %s\n", name);
talloc_free(name);
MP_DBG(ao, "Activating pAudioClient interface\n");
hr = IMMDeviceActivator_Activate(state->pDevice, &IID_IAudioClient,
CLSCTX_ALL, NULL, (void **)&state->pAudioClient);
EXIT_ON_ERROR(hr);
MP_DBG(ao, "Activating pEndpointVolume interface\n");
hr = IMMDeviceActivator_Activate(state->pDevice, &IID_IAudioEndpointVolume,
CLSCTX_ALL, NULL,
(void **)&state->pEndpointVolume);
EXIT_ON_ERROR(hr);
MP_DBG(ao, "Query hardware volume support\n");
hr = IAudioEndpointVolume_QueryHardwareSupport(state->pEndpointVolume,
&state->vol_hw_support);
if (hr != S_OK) {
MP_WARN(ao, "Error querying hardware volume control: %s\n",
mp_HRESULT_to_str(hr));
}
MP_DBG(ao, "Probing formats\n");
if (!find_formats(ao)) {
hr = E_FAIL;
EXIT_ON_ERROR(hr);
}
MP_DBG(ao, "Fixing format\n");
hr = fix_format(ao);
if ((hr == AUDCLNT_E_DEVICE_IN_USE || hr == AUDCLNT_E_DEVICE_INVALIDATED) &&
retry_wait <= 8)
{
wasapi_thread_uninit(ao);
MP_WARN(ao, "Retrying in %"PRId64" us\n", retry_wait);
mp_sleep_us(retry_wait);
retry_wait *= 2;
goto retry;
}
EXIT_ON_ERROR(hr);
MP_DBG(ao, "Creating proxies\n");
hr = create_proxies(state);
EXIT_ON_ERROR(hr);
MP_DBG(ao, "Read volume levels\n");
if (state->opt_exclusive) {
IAudioEndpointVolume_GetMasterVolumeLevelScalar(state->pEndpointVolume,
&state->initial_volume);
} else {
ISimpleAudioVolume_GetMasterVolume(state->pAudioVolume,
&state->initial_volume);
}
state->previous_volume = state->initial_volume;
wasapi_change_init(ao, false);
MP_DBG(ao, "Init wasapi thread done\n");
return S_OK;
exit_label:
MP_ERR(state, "Error setting up audio thread: %s\n", mp_HRESULT_to_str(hr));
return hr;
}
void wasapi_thread_uninit(struct ao *ao)
{
struct wasapi_state *state = ao->priv;
MP_DBG(ao, "Thread shutdown\n");
wasapi_dispatch(ao);
if (state->pAudioClient)
IAudioClient_Stop(state->pAudioClient);
wasapi_change_uninit(ao);
if (state->opt_exclusive && state->pEndpointVolume && state->initial_volume > 0 ) {
IAudioEndpointVolume_SetMasterVolumeLevelScalar(state->pEndpointVolume,
state->initial_volume, NULL);
}
destroy_proxies(state);
SAFE_RELEASE(state->pRenderClient, IAudioRenderClient_Release(state->pRenderClient));
SAFE_RELEASE(state->pAudioClock, IAudioClock_Release(state->pAudioClock));
SAFE_RELEASE(state->pAudioVolume, ISimpleAudioVolume_Release(state->pAudioVolume));
SAFE_RELEASE(state->pEndpointVolume, IAudioEndpointVolume_Release(state->pEndpointVolume));
SAFE_RELEASE(state->pSessionControl, IAudioSessionControl_Release(state->pSessionControl));
SAFE_RELEASE(state->pAudioClient, IAudioClient_Release(state->pAudioClient));
SAFE_RELEASE(state->pDevice, IMMDevice_Release(state->pDevice));
SAFE_RELEASE(state->pEnumerator, IMMDeviceEnumerator_Release(state->pEnumerator));
if (state->hTask)
state->VistaBlob.pAvRevertMmThreadCharacteristics(state->hTask);
MP_DBG(ao, "Thread uninit done\n");
}
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