RepoMirrors/mpv
1
0
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2024-12-25 16:33:02 +00:00
Code Issues Releases Wiki Activity
e16c91d07a
mpv/audio/out/ao_wasapi.c
wm4 e16c91d07a audio/out: make draining a separate operation 
Until now, this was always conflated with uninit. This was ugly, and
also many AOs emulated this manually (or just ignored it). Make draining
an explicit operation, so AOs which support it can provide it, and for
all others generic code will emulate it.

For ao_wasapi, we keep it simple and basically disable the internal
draining implementation (maybe it should be restored later).

Tested on Linux only.
2014-03-09 01:27:41 +01:00

1433 lines
46 KiB
C
Raw Blame History

/*
* 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/>.
*/
#define COBJMACROS 1
#define _WIN32_WINNT 0x600
#include <stdlib.h>
#include <inttypes.h>
#include <process.h>
#include <initguid.h>
#include <audioclient.h>
#include <endpointvolume.h>
#include <mmdeviceapi.h>
#include <avrt.h>
#include "options/m_option.h"
#include "options/m_config.h"
#include "audio/format.h"
#include "common/msg.h"
#include "misc/ring.h"
#include "ao.h"
#include "internal.h"
#include "compat/atomics.h"
#ifndef PKEY_Device_FriendlyName
DEFINE_PROPERTYKEY(PKEY_Device_FriendlyName,
0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20,
0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, 14);
DEFINE_PROPERTYKEY(PKEY_Device_DeviceDesc,
0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20,
0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, 2);
#endif
#define RING_BUFFER_COUNT 8
/* 20 millisecond buffer? */
#define BUFFER_TIME 20000000.0
#define EXIT_ON_ERROR(hres) \
do { if (FAILED(hres)) { goto exit_label; } } while(0)
#define SAFE_RELEASE(unk, release) \
do { if ((unk) != NULL) { release; (unk) = NULL; } } while(0)
/* Supposed to use __uuidof, but it is C++ only, declare our own */
static const GUID local_KSDATAFORMAT_SUBTYPE_PCM = {
0x1, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
};
static const GUID local_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = {
0x3, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
};
union WAVEFMT {
WAVEFORMATEX *ex;
WAVEFORMATEXTENSIBLE *extensible;
};
typedef struct wasapi_state {
struct mp_log *log;
HANDLE threadLoop;
/* Init phase */
int init_ret;
HANDLE init_done;
HANDLE fatal_error; /* signal to indicate unrecoverable error */
int share_mode;
/* Events */
HANDLE hPause;
/* Play */
HANDLE hPlay;
int is_playing;
int final_chunk;
/* Reset */
HANDLE hReset;
/* uninit */
HANDLE hUninit;
LONG immed;
/* volume control */
HANDLE hGetvol, hSetvol, hDoneVol;
DWORD vol_hw_support, status;
float audio_volume;
/* Buffers */
struct mp_ring *ringbuff;
size_t buffer_block_size; /* Size of each block in bytes */
REFERENCE_TIME
minRequestedDuration; /* minimum wasapi buffer block size, in 100-nanosecond units */
REFERENCE_TIME
defaultRequestedDuration; /* default wasapi default block size, in 100-nanosecond units */
UINT32 bufferFrameCount; /* wasapi buffer block size, number of frames, frame size at format.nBlockAlign */
/* WASAPI handles, owned by other thread */
IMMDevice *pDevice;
IAudioClient *pAudioClient;
IAudioRenderClient *pRenderClient;
IAudioEndpointVolume *pEndpointVolume;
HANDLE hFeed; /* wasapi event */
HANDLE hTask; /* AV thread */
DWORD taskIndex; /* AV task ID */
WAVEFORMATEXTENSIBLE format;
/* WASAPI internal clock information, for estimating delay */
IAudioClock *pAudioClock;
UINT64 clock_frequency; /* scale for the "samples" returned by the clock */
UINT64 sample_count; /* the amount of samples per channel written to a GetBuffer buffer */
LARGE_INTEGER qpc_frequency; /* frequency of windows' high resolution timer */
int opt_exclusive;
int opt_list;
char *opt_device;
/* We still need to support XP, don't use these functions directly, blob owned by main thread */
struct {
HMODULE hAvrt;
HANDLE (WINAPI *pAvSetMmThreadCharacteristicsW)(LPCWSTR, LPDWORD);
WINBOOL (WINAPI *pAvRevertMmThreadCharacteristics)(HANDLE);
} VistaBlob;
} wasapi_state;
static int fill_VistaBlob(wasapi_state *state)
{
if (!state)
return 1;
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");
state->VistaBlob.pAvRevertMmThreadCharacteristics =
(WINBOOL (WINAPI *)(HANDLE))
GetProcAddress(state->VistaBlob.hAvrt, "AvRevertMmThreadCharacteristics");
return 0;
exit_label:
if (state->VistaBlob.hAvrt)
FreeLibrary(state->VistaBlob.hAvrt);
return 1;
}
static const char *explain_err(const HRESULT hr)
{
switch (hr) {
case S_OK:
return "S_OK";
case AUDCLNT_E_NOT_INITIALIZED:
return "AUDCLNT_E_NOT_INITIALIZED";
case AUDCLNT_E_ALREADY_INITIALIZED:
return "AUDCLNT_E_ALREADY_INITIALIZED";
case AUDCLNT_E_WRONG_ENDPOINT_TYPE:
return "AUDCLNT_E_WRONG_ENDPOINT_TYPE";
case AUDCLNT_E_DEVICE_INVALIDATED:
return "AUDCLNT_E_DEVICE_INVALIDATED";
case AUDCLNT_E_NOT_STOPPED:
return "AUDCLNT_E_NOT_STOPPED";
case AUDCLNT_E_BUFFER_TOO_LARGE:
return "AUDCLNT_E_BUFFER_TOO_LARGE";
case AUDCLNT_E_OUT_OF_ORDER:
return "AUDCLNT_E_OUT_OF_ORDER";
case AUDCLNT_E_UNSUPPORTED_FORMAT:
return "AUDCLNT_E_UNSUPPORTED_FORMAT";
case AUDCLNT_E_INVALID_SIZE:
return "AUDCLNT_E_INVALID_SIZE";
case AUDCLNT_E_DEVICE_IN_USE:
return "AUDCLNT_E_DEVICE_IN_USE";
case AUDCLNT_E_BUFFER_OPERATION_PENDING:
return "AUDCLNT_E_BUFFER_OPERATION_PENDING";
case AUDCLNT_E_THREAD_NOT_REGISTERED:
return "AUDCLNT_E_THREAD_NOT_REGISTERED";
case AUDCLNT_E_EXCLUSIVE_MODE_NOT_ALLOWED:
return "AUDCLNT_E_EXCLUSIVE_MODE_NOT_ALLOWED";
case AUDCLNT_E_ENDPOINT_CREATE_FAILED:
return "AUDCLNT_E_ENDPOINT_CREATE_FAILED";
case AUDCLNT_E_SERVICE_NOT_RUNNING:
return "AUDCLNT_E_SERVICE_NOT_RUNNING";
case AUDCLNT_E_EVENTHANDLE_NOT_EXPECTED:
return "AUDCLNT_E_EVENTHANDLE_NOT_EXPECTED";
case AUDCLNT_E_EXCLUSIVE_MODE_ONLY:
return "AUDCLNT_E_EXCLUSIVE_MODE_ONLY";
case AUDCLNT_E_BUFDURATION_PERIOD_NOT_EQUAL:
return "AUDCLNT_E_BUFDURATION_PERIOD_NOT_EQUAL";
case AUDCLNT_E_EVENTHANDLE_NOT_SET:
return "AUDCLNT_E_EVENTHANDLE_NOT_SET";
case AUDCLNT_E_INCORRECT_BUFFER_SIZE:
return "AUDCLNT_E_INCORRECT_BUFFER_SIZE";
case AUDCLNT_E_BUFFER_SIZE_ERROR:
return "AUDCLNT_E_BUFFER_SIZE_ERROR";
case AUDCLNT_E_CPUUSAGE_EXCEEDED:
return "AUDCLNT_E_CPUUSAGE_EXCEEDED";
case AUDCLNT_E_BUFFER_ERROR:
return "AUDCLNT_E_BUFFER_ERROR";
case AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED:
return "AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED";
case AUDCLNT_E_INVALID_DEVICE_PERIOD:
return "AUDCLNT_E_INVALID_DEVICE_PERIOD";
case AUDCLNT_E_INVALID_STREAM_FLAG:
return "AUDCLNT_E_INVALID_STREAM_FLAG";
case AUDCLNT_E_ENDPOINT_OFFLOAD_NOT_CAPABLE:
return "AUDCLNT_E_ENDPOINT_OFFLOAD_NOT_CAPABLE";
case AUDCLNT_E_RESOURCES_INVALIDATED:
return "AUDCLNT_E_RESOURCES_INVALIDATED";
case AUDCLNT_S_BUFFER_EMPTY:
return "AUDCLNT_S_BUFFER_EMPTY";
case AUDCLNT_S_THREAD_ALREADY_REGISTERED:
return "AUDCLNT_S_THREAD_ALREADY_REGISTERED";
case AUDCLNT_S_POSITION_STALLED:
return "AUDCLNT_S_POSITION_STALLED";
default:
return "<Unknown>";
}
}
static void set_format(WAVEFORMATEXTENSIBLE *wformat, WORD bytepersample,
DWORD samplerate, WORD channels, DWORD chanmask)
{
wformat->Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE; /* Only PCM is supported */
wformat->Format.nChannels = channels;
wformat->Format.nSamplesPerSec = samplerate;
wformat->Format.nAvgBytesPerSec = wformat->Format.nChannels *
bytepersample *
wformat->Format.nSamplesPerSec;
wformat->Format.nBlockAlign = wformat->Format.nChannels * bytepersample;
wformat->Format.wBitsPerSample = bytepersample * 8;
wformat->Format.cbSize =
22; /* must be at least 22 for WAVE_FORMAT_EXTENSIBLE */
if (bytepersample == 4)
wformat->SubFormat = local_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
else
wformat->SubFormat = local_KSDATAFORMAT_SUBTYPE_PCM;
wformat->Samples.wValidBitsPerSample = wformat->Format.wBitsPerSample;
wformat->dwChannelMask = chanmask;
}
static int format_set_bits(int old_format, int bits, int fp) {
int format = old_format;
format &= (~AF_FORMAT_BITS_MASK) & (~AF_FORMAT_POINT_MASK) & (~AF_FORMAT_SIGN_MASK);
format |= AF_FORMAT_SI;
switch (bits) {
case 32:
format |= AF_FORMAT_32BIT;
break;
case 24:
format |= AF_FORMAT_24BIT;
break;
case 16:
format |= AF_FORMAT_16BIT;
break;
default:
abort(); // (should be) unreachable
}
if (fp) {
format |= AF_FORMAT_F;
} else {
format |= AF_FORMAT_I;
}
return format;
}
static int set_ao_format(struct wasapi_state *state,
struct ao *const ao,
WAVEFORMATEXTENSIBLE wformat) {
// .Data1 == 1 is PCM, .Data1 == 3 is IEEE_FLOAT
int format = format_set_bits(ao->format,
wformat.Format.wBitsPerSample, wformat.SubFormat.Data1 == 3);
if (wformat.SubFormat.Data1 != 1 && wformat.SubFormat.Data1 != 3) {
MP_ERR(ao, "unknown SubFormat %"PRIu32"\n",
(uint32_t)wformat.SubFormat.Data1);
return 0;
}
ao->samplerate = wformat.Format.nSamplesPerSec;
ao->bps = wformat.Format.nAvgBytesPerSec;
ao->format = format;
if (ao->channels.num != wformat.Format.nChannels) {
mp_chmap_from_channels(&ao->channels, wformat.Format.nChannels);
}
state->format = wformat;
return 1;
}
static int try_format(struct wasapi_state *state,
struct ao *const ao,
int bits, int samplerate,
const struct mp_chmap channels)
{
WAVEFORMATEXTENSIBLE wformat;
set_format(&wformat, bits / 8, samplerate, channels.num, mp_chmap_to_waveext(&channels));
int af_format = format_set_bits(ao->format, bits, bits == 32);
MP_VERBOSE(ao, "trying %dch %s @ %dhz\n",
channels.num, af_fmt_to_str(af_format), samplerate);
union WAVEFMT u;
u.extensible = &wformat;
WAVEFORMATEX *closestMatch;
HRESULT hr = IAudioClient_IsFormatSupported(state->pAudioClient,
state->share_mode,
u.ex, &closestMatch);
if (closestMatch) {
if (closestMatch->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
u.ex = closestMatch;
wformat = *u.extensible;
} else {
wformat.Format = *closestMatch;
}
CoTaskMemFree(closestMatch);
}
if (hr == S_FALSE) {
if (set_ao_format(state, ao, wformat)) {
MP_VERBOSE(ao, "accepted as %dch %s @ %dhz\n",
ao->channels.num, af_fmt_to_str(ao->format), ao->samplerate);
return 1;
}
} 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(state, ao, wformat)) {
MP_VERBOSE(ao, "%dch %s @ %dhz accepted\n",
ao->channels.num, af_fmt_to_str(af_format), samplerate);
return 1;
}
}
return 0;
}
static int try_mix_format(struct wasapi_state *state,
struct ao *const ao)
{
WAVEFORMATEX *deviceFormat = NULL;
WAVEFORMATEX *closestMatch = NULL;
int ret = 0;
HRESULT hr = IAudioClient_GetMixFormat(state->pAudioClient, &deviceFormat);
EXIT_ON_ERROR(hr);
union WAVEFMT u;
u.ex = deviceFormat;
WAVEFORMATEXTENSIBLE wformat = *u.extensible;
ret = try_format(state, ao, wformat.Format.wBitsPerSample,
wformat.Format.nSamplesPerSec, ao->channels);
if (ret)
state->format = wformat;
exit_label:
SAFE_RELEASE(deviceFormat, CoTaskMemFree(deviceFormat));
SAFE_RELEASE(closestMatch, CoTaskMemFree(closestMatch));
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,
.nAvgBytesPerSec = (ao->samplerate) * (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;
MP_VERBOSE(ao, "trying passthrough for %s...\n",
af_fmt_to_str((ao->format&~AF_FORMAT_END_MASK) | AF_FORMAT_LE));
HRESULT hr = IAudioClient_IsFormatSupported(state->pAudioClient,
state->share_mode,
u.ex, NULL);
if (!FAILED(hr)) {
ao->format = (ao->format&~AF_FORMAT_END_MASK) | AF_FORMAT_LE;
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) || ao->format == AF_FORMAT_MPEG2) {
if (try_passthrough(state, ao))
return 0;
MP_ERR(ao, "couldn't use passthrough!");
if (!state->opt_exclusive)
MP_ERR(ao, " (try exclusive mode)");
MP_ERR(ao, "\n");
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);
let's just stick to PCM or float here. */
if (bits == 8) {
bits = 16;
} else if (try_format(state, ao, bits, ao->samplerate, ao->channels)) {
return 0;
}
if (!state->opt_exclusive) {
/* shared mode, we can use the system default mix format. */
if (try_mix_format(state, ao)) {
return 0;
}
MP_WARN(ao, "couldn't use default mix format!\n");
}
/* Exclusive mode, we have to guess. */
/* as far as testing shows, only PCM 16/24LE (44100Hz - 192kHz) is supported
* Tested on Realtek High Definition Audio, (Realtek Semiconductor Corp. 6.0.1.6312)
* Drivers dated 2/18/2011
*/
/* try float first for non-16bit audio */
if (bits != 16) {
bits = 32;
}
int start_bits = bits;
while (1) { // not infinite -- returns at bottom
for (; bits > 8; bits -= 8) {
int samplerate = ao->samplerate;
if (try_format(state, ao, bits, samplerate, ao->channels)) {
return 0;
}
// make samplerate fit in [44100 192000]
// we check for samplerate > 96k so that we can upsample instead of downsampling later
if (samplerate < 44100 || samplerate > 96000) {
if (samplerate < 44100)
samplerate = 44100;
if (samplerate > 96000)
samplerate = 192000;
if (try_format(state, ao, bits, samplerate, ao->channels)) {
return 0;
}
}
// try bounding to 96kHz
if (samplerate > 48000) {
samplerate = 96000;
if (try_format(state, ao, bits, samplerate, ao->channels)) {
return 0;
}
}
// try bounding to 48kHz
if (samplerate > 44100) {
samplerate = 48000;
if (try_format(state, ao, bits, samplerate, ao->channels)) {
return 0;
}
}
/* How bad is this? try 44100hz, but only on 16bit */
if (bits == 16 && samplerate != 44100) {
samplerate = 44100;
if (try_format(state, ao, bits, samplerate, ao->channels)) {
return 0;
}
}
}
if (ao->channels.num > 6) {
/* Maybe this is 5.1 hardware with no support for more. */
bits = start_bits;
mp_chmap_from_channels(&ao->channels, 6);
} else if (ao->channels.num != 2) {
/* Poor quality hardware? Try stereo mode, go through the list again. */
bits = start_bits;
mp_chmap_from_channels(&ao->channels, 2);
} else {
MP_ERR(ao, "couldn't find acceptable audio format!\n");
return -1;
}
}
}
static int init_clock(struct wasapi_state *state) {
HRESULT hr;
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);
state->sample_count = 0;
MP_VERBOSE(state, "IAudioClock::GetFrequency gave a frequency of %"PRIu64".\n", (uint64_t) state->clock_frequency);
return 0;
exit_label:
MP_ERR(state, "init_clock failed with %s, unable to obtain the audio device's timing!\n",
explain_err(hr));
SetEvent(state->fatal_error);
return 1;
}
static int fix_format(struct wasapi_state *state)
{
HRESULT hr;
double offset = 0.5;
/* cargo cult code to negotiate buffer block size, affected by hardware/drivers combinations,
gradually grow it to 10s, by 0.5s, consider failure if it still doesn't work
*/
hr = IAudioClient_GetDevicePeriod(state->pAudioClient,
&state->defaultRequestedDuration,
&state->minRequestedDuration);
reinit:
hr = IAudioClient_Initialize(state->pAudioClient,
state->share_mode,
AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
state->defaultRequestedDuration,
state->defaultRequestedDuration,
&(state->format.Format),
NULL);
/* something about buffer sizes on Win7, fixme might loop forever */
if (hr == AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED) {
MP_VERBOSE(state, "IAudioClient::Initialize negotiation failed with %s, used %lld * 100ns\n",
explain_err(hr), state->defaultRequestedDuration);
if (offset > 10.0)
goto exit_label; /* is 10 enough to break out of the loop?*/
IAudioClient_GetBufferSize(state->pAudioClient, &state->bufferFrameCount);
state->defaultRequestedDuration =
(REFERENCE_TIME)((BUFFER_TIME / state->format.Format.nSamplesPerSec *
state->bufferFrameCount) + offset);
offset += 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);
hr = IAudioClient_GetService(state->pAudioClient,
&IID_IAudioRenderClient,
(void **)&state->pRenderClient);
EXIT_ON_ERROR(hr);
if (!state->hFeed)
goto exit_label;
hr = IAudioClient_SetEventHandle(state->pAudioClient, state->hFeed);
EXIT_ON_ERROR(hr);
hr = IAudioClient_GetBufferSize(state->pAudioClient,
&state->bufferFrameCount);
EXIT_ON_ERROR(hr);
state->buffer_block_size = state->format.Format.nChannels *
state->format.Format.wBitsPerSample / 8 *
state->bufferFrameCount;
if (init_clock(state))
return 1;
state->hTask =
state->VistaBlob.pAvSetMmThreadCharacteristicsW(L"Pro Audio", &state->taskIndex);
MP_VERBOSE(state, "fix_format OK, using %lld byte buffer block size!\n",
(long long) state->buffer_block_size);
return 0;
exit_label:
MP_ERR(state, "fix_format fails with %s, failed to determine buffer block size!\n",
explain_err(hr));
SetEvent(state->fatal_error);
return 1;
}
static char* wstring_to_utf8(wchar_t *wstring) {
if (wstring) {
int len = WideCharToMultiByte(CP_UTF8, 0, wstring, -1, NULL, 0, NULL, NULL);
char *ret = malloc(len);
WideCharToMultiByte(CP_UTF8, 0, wstring, -1, ret, len, NULL, NULL);
return ret;
}
return NULL;
}
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 = wstring_to_utf8(devid);
if (strstr(idstr, "{0.0.0.00000000}.")) {
char *stripped = strdup(idstr + strlen("{0.0.0.00000000}."));
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, &PKEY_Device_FriendlyName, &devname);
EXIT_ON_ERROR(hr);
namestr = wstring_to_utf8(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, &PKEY_Device_DeviceDesc, &devdesc);
EXIT_ON_ERROR(hr);
desc = wstring_to_utf8(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:
free(idstr);
return found;
}
static HRESULT enumerate_with_state(struct mp_log *log, char *header,
int status, int with_id)
{
HRESULT hr;
IMMDeviceEnumerator *pEnumerator = NULL;
IMMDeviceCollection *pDevices = NULL;
IMMDevice *pDevice = NULL;
char *defid = NULL;
hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
&IID_IMMDeviceEnumerator, (void **)&pEnumerator);
EXIT_ON_ERROR(hr);
hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(pEnumerator,
eRender, eConsole,
&pDevice);
EXIT_ON_ERROR(hr);
defid = get_device_id(pDevice);
SAFE_RELEASE(pDevice, IMMDevice_Release(pDevice));
hr = IMMDeviceEnumerator_EnumAudioEndpoints(pEnumerator, eRender,
status, &pDevices);
EXIT_ON_ERROR(hr);
int count;
IMMDeviceCollection_GetCount(pDevices, &count);
if (count > 0) {
mp_info(log, "%s\n", header);
}
for (int i = 0; i < count; i++) {
hr = IMMDeviceCollection_Item(pDevices, i, &pDevice);
EXIT_ON_ERROR(hr);
char *name = get_device_name(pDevice);
char *id = get_device_id(pDevice);
char *mark = "";
if (strcmp(id, defid) == 0)
mark = " (default)";
if (with_id) {
mp_info(log, "Device #%d: %s, ID: %s%s\n", i, name, id, mark);
} else {
mp_info(log, "%s, ID: %s%s\n", name, id, mark);
}
free(name);
free(id);
SAFE_RELEASE(pDevice, IMMDevice_Release(pDevice));
}
free(defid);
SAFE_RELEASE(pDevices, IMMDeviceCollection_Release(pDevices));
SAFE_RELEASE(pEnumerator, IMMDeviceEnumerator_Release(pEnumerator));
return hr;
exit_label:
free(defid);
SAFE_RELEASE(pDevice, IMMDevice_Release(pDevice));
SAFE_RELEASE(pDevices, IMMDeviceCollection_Release(pDevices));
SAFE_RELEASE(pEnumerator, IMMDeviceEnumerator_Release(pEnumerator));
return hr;
}
static int enumerate_devices(struct mp_log *log)
{
HRESULT hr;
CoInitialize(NULL);
hr = enumerate_with_state(log, "Active devices:", DEVICE_STATE_ACTIVE, 1);
EXIT_ON_ERROR(hr);
hr = enumerate_with_state(log, "Unplugged devices:", DEVICE_STATE_UNPLUGGED, 0);
EXIT_ON_ERROR(hr);
CoUninitialize();
return 0;
exit_label:
mp_err(log, "Error enumerating devices: HRESULT %08"PRIx32" \"%s\"\n",
(uint32_t)hr, explain_err(hr));
CoUninitialize();
return 1;
}
static HRESULT find_and_load_device(struct ao *ao, IMMDevice **ppDevice,
char *search)
{
HRESULT hr;
IMMDeviceEnumerator *pEnumerator = NULL;
IMMDeviceCollection *pDevices = NULL;
IMMDevice *pTempDevice = NULL;
LPWSTR deviceID = NULL;
char *end;
int devno = (int) strtol(search, &end, 10);
char *devid = NULL;
if (end == search || *end) {
devid = search;
}
hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
&IID_IMMDeviceEnumerator, (void**)&pEnumerator);
EXIT_ON_ERROR(hr);
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);
free(name);
search_err = 1;
}
name = get_device_name(pTempDevice);
MP_ERR(ao, "%s\n", name);
free(name);
}
hr = IMMDevice_GetId(pTempDevice, &deviceID);
prevDevice = pTempDevice;
}
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));
SAFE_RELEASE(pEnumerator, IMMDeviceEnumerator_Release(pEnumerator));
return hr;
}
static int validate_device(struct mp_log *log, const m_option_t *opt,
struct bstr name, struct bstr param)
{
if (bstr_equals0(param, "help")) {
enumerate_devices(log);
return M_OPT_EXIT;
}
mp_dbg(log, "validating device=%s\n", param.start);
char *end;
int devno = (int) strtol(param.start, &end, 10);
int ret = 1;
if ((end == (void*)param.start || *end) && devno < 0)
ret = M_OPT_OUT_OF_RANGE;
mp_dbg(log, "device=%s %svalid\n", param.start, ret == 1 ? "" : "not ");
return ret;
}
static int thread_init(struct ao *ao)
{
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
HRESULT hr;
CoInitialize(NULL);
if (!state->opt_device) {
IMMDeviceEnumerator *pEnumerator;
hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
&IID_IMMDeviceEnumerator, (void**)&pEnumerator);
EXIT_ON_ERROR(hr);
hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(pEnumerator,
eRender, eConsole,
&state->pDevice);
SAFE_RELEASE(pEnumerator, IMMDeviceEnumerator_Release(pEnumerator));
char *id = get_device_id(state->pDevice);
MP_VERBOSE(ao, "default device ID: %s\n", id);
free(id);
} else {
hr = find_and_load_device(ao, &state->pDevice, state->opt_device);
}
EXIT_ON_ERROR(hr);
char *name = get_device_name(state->pDevice);
MP_VERBOSE(ao, "device loaded: %s\n", name);
free(name);
hr = IMMDeviceActivator_Activate(state->pDevice, &IID_IAudioClient,
CLSCTX_ALL, NULL, (void **)&state->pAudioClient);
EXIT_ON_ERROR(hr);
hr = IMMDeviceActivator_Activate(state->pDevice, &IID_IAudioEndpointVolume,
CLSCTX_ALL, NULL,
(void **)&state->pEndpointVolume);
EXIT_ON_ERROR(hr);
IAudioEndpointVolume_QueryHardwareSupport(state->pEndpointVolume,
&state->vol_hw_support);
state->init_ret = find_formats(ao); /* Probe support formats */
if (state->init_ret)
goto exit_label;
if (!fix_format(state)) { /* now that we're sure what format to use */
MP_VERBOSE(ao, "thread_init OK!\n");
SetEvent(state->init_done);
return state->init_ret;
}
exit_label:
state->init_ret = -1;
SetEvent(state->init_done);
return -1;
}
static void thread_pause(wasapi_state *state)
{
state->is_playing = 0;
IAudioClient_Stop(state->pAudioClient);
IAudioClient_Reset(state->pAudioClient);
state->sample_count = 0;
mp_memory_barrier();
}
/* force_feed - feed in even if available data is smaller than required buffer, to clear the buffer */
static void thread_feed(wasapi_state *state,int force_feed)
{
BYTE *pData;
int buffer_size;
HRESULT hr;
UINT32 frame_count = state->bufferFrameCount;
UINT32 client_buffer = state->buffer_block_size;
if (state->share_mode == AUDCLNT_SHAREMODE_SHARED) {
UINT32 padding = 0;
hr = IAudioClient_GetCurrentPadding(state->pAudioClient, &padding);
EXIT_ON_ERROR(hr);
frame_count -= padding;
client_buffer = state->format.Format.nBlockAlign * frame_count;
}
hr = IAudioRenderClient_GetBuffer(state->pRenderClient,
frame_count, &pData);
EXIT_ON_ERROR(hr);
buffer_size = mp_ring_buffered(state->ringbuff);
if(buffer_size > client_buffer) { /* OK to copy! */
mp_ring_read(state->ringbuff, (unsigned char *)pData,
client_buffer);
} else if(force_feed) {
/* should be smaller than buffer block size by now */
memset(pData,0,client_buffer);
mp_ring_read(state->ringbuff, (unsigned char *)pData, client_buffer);
state->final_chunk = 0;
} else {
/* buffer underrun?! abort */
hr = IAudioRenderClient_ReleaseBuffer(state->pRenderClient,
frame_count,
AUDCLNT_BUFFERFLAGS_SILENT);
EXIT_ON_ERROR(hr);
mp_atomic_add_and_fetch(&state->sample_count, frame_count);
mp_memory_barrier();
return;
}
hr = IAudioRenderClient_ReleaseBuffer(state->pRenderClient,
frame_count, 0);
EXIT_ON_ERROR(hr);
mp_atomic_add_and_fetch(&state->sample_count, frame_count);
mp_memory_barrier();
return;
exit_label:
MP_ERR(state, "thread_feed fails with %"PRIx32"!\n", (uint32_t)hr);
return;
}
static void thread_play(wasapi_state *state)
{
thread_feed(state, state->final_chunk);
state->is_playing = 1;
IAudioClient_Start(state->pAudioClient);
return;
}
static void thread_reset(wasapi_state *state)
{
int playing = state->is_playing;
thread_pause(state);
if (playing) {
thread_play(state);
}
}
static void thread_getVol(wasapi_state *state)
{
IAudioEndpointVolume_GetMasterVolumeLevelScalar(state->pEndpointVolume,
&state->audio_volume);
SetEvent(state->hDoneVol);
}
static void thread_setVol(wasapi_state *state)
{
IAudioEndpointVolume_SetMasterVolumeLevelScalar(state->pEndpointVolume,
state->audio_volume, NULL);
SetEvent(state->hDoneVol);
}
static void thread_uninit(wasapi_state *state)
{
if (!state->immed) {
/* feed until empty */
while (1) {
if (WaitForSingleObject(state->hFeed,2000) == WAIT_OBJECT_0 &&
mp_ring_buffered(state->ringbuff))
{
thread_feed(state, 1);
} else
break;
}
}
if (state->pAudioClient)
IAudioClient_Stop(state->pAudioClient);
if (state->pRenderClient)
IAudioRenderClient_Release(state->pRenderClient);
if (state->pAudioClock)
IAudioClock_Release(state->pAudioClock);
if (state->pAudioClient)
IAudioClient_Release(state->pAudioClient);
if (state->pDevice)
IMMDevice_Release(state->pDevice);
if (state->hTask)
state->VistaBlob.pAvRevertMmThreadCharacteristics(state->hTask);
CoUninitialize();
ExitThread(0);
}
static DWORD __stdcall ThreadLoop(void *lpParameter)
{
struct ao *ao = lpParameter;
int feedwatch = 0;
if (!ao || !ao->priv)
return -1;
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
if (thread_init(ao))
goto exit_label;
DWORD waitstatus = WAIT_FAILED;
HANDLE playcontrol[] =
{state->hUninit, state->hPause, state->hReset, state->hGetvol,
state->hSetvol, state->hPlay, state->hFeed, NULL};
MP_VERBOSE(ao, "Entering dispatch loop!\n");
while (1) { /* watch events, poll at least every 2 seconds */
waitstatus = WaitForMultipleObjects(7, playcontrol, FALSE, 2000);
switch (waitstatus) {
case WAIT_OBJECT_0: /*shutdown*/
feedwatch = 0;
thread_uninit(state);
goto exit_label;
case (WAIT_OBJECT_0 + 1): /* pause */
feedwatch = 0;
thread_pause(state);
break;
case (WAIT_OBJECT_0 + 2): /* reset */
feedwatch = 0;
thread_reset(state);
break;
case (WAIT_OBJECT_0 + 3): /* getVolume */
thread_getVol(state);
break;
case (WAIT_OBJECT_0 + 4): /* setVolume */
thread_setVol(state);
break;
case (WAIT_OBJECT_0 + 5): /* play */
feedwatch = 0;
thread_play(state);
break;
case (WAIT_OBJECT_0 + 6): /* feed */
if (state->is_playing)
feedwatch = 1;
thread_feed(state, state->final_chunk);
break;
case WAIT_TIMEOUT: /* Did our feed die? */
if (feedwatch)
return -1;
break;
default:
case WAIT_FAILED: /* ??? */
return -1;
}
}
exit_label:
return state->init_ret;
}
static void closehandles(struct ao *ao)
{
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
if (state->init_done)
CloseHandle(state->init_done);
if (state->hPlay)
CloseHandle(state->hPlay);
if (state->hPause)
CloseHandle(state->hPause);
if (state->hReset)
CloseHandle(state->hReset);
if (state->hUninit)
CloseHandle(state->hUninit);
if (state->hFeed)
CloseHandle(state->hFeed);
if (state->hGetvol)
CloseHandle(state->hGetvol);
if (state->hSetvol)
CloseHandle(state->hSetvol);
if (state->hDoneVol)
CloseHandle(state->hDoneVol);
}
static int get_space(struct ao *ao)
{
if (!ao || !ao->priv)
return -1;
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
return mp_ring_available(state->ringbuff) / ao->sstride;
}
static void reset_buffers(struct wasapi_state *state)
{
state->final_chunk = 0;
mp_ring_reset(state->ringbuff);
}
static int setup_buffers(struct wasapi_state *state)
{
state->ringbuff =
mp_ring_new(state, RING_BUFFER_COUNT * state->buffer_block_size);
return !state->ringbuff;
}
static void uninit(struct ao *ao)
{
MP_VERBOSE(ao, "uninit!\n");
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
state->immed = 1;
SetEvent(state->hUninit);
/* wait up to 10 seconds */
if (WaitForSingleObject(state->threadLoop, 10000) == WAIT_TIMEOUT)
SetEvent(state->fatal_error);
if (state->VistaBlob.hAvrt)
FreeLibrary(state->VistaBlob.hAvrt);
closehandles(ao);
MP_VERBOSE(ao, "uninit END!\n");
}
static int init(struct ao *ao)
{
MP_VERBOSE(ao, "init!\n");
ao->format = af_fmt_from_planar(ao->format);
struct mp_chmap_sel sel = {0};
mp_chmap_sel_add_waveext(&sel);
if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels))
return -1;
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
state->log = ao->log;
fill_VistaBlob(state);
if (state->opt_list) {
enumerate_devices(state->log);
}
if (state->opt_exclusive) {
state->share_mode = AUDCLNT_SHAREMODE_EXCLUSIVE;
} else {
state->share_mode = AUDCLNT_SHAREMODE_SHARED;
}
state->init_done = CreateEventW(NULL, FALSE, FALSE, NULL);
state->hPlay = CreateEventW(NULL, FALSE, FALSE, NULL); /* kick start audio feed */
state->hPause = CreateEventW(NULL, FALSE, FALSE, NULL);
state->hReset = CreateEventW(NULL, FALSE, FALSE, NULL);
state->hGetvol = CreateEventW(NULL, FALSE, FALSE, NULL);
state->hSetvol = CreateEventW(NULL, FALSE, FALSE, NULL);
state->hDoneVol = CreateEventW(NULL, FALSE, FALSE, NULL);
state->hUninit = CreateEventW(NULL, FALSE, FALSE, NULL);
state->fatal_error = CreateEventW(NULL, TRUE, FALSE, NULL);
state->hFeed = CreateEvent(NULL, FALSE, FALSE, NULL); /* for wasapi event mode */
if (!state->init_done || !state->fatal_error || !state->hPlay ||
!state->hPause || !state->hFeed || !state->hReset || !state->hGetvol ||
!state->hSetvol || !state->hDoneVol)
{
closehandles(ao);
/* failed to init events */
return -1;
}
state->init_ret = -1;
state->threadLoop = (HANDLE)CreateThread(NULL, 0, &ThreadLoop, ao, 0, NULL);
if (!state->threadLoop) {
/* failed to init thread */
MP_ERR(ao, "fail to create thread!\n");
return -1;
}
WaitForSingleObject(state->init_done, INFINITE); /* wait on init complete */
if (state->init_ret) {
if (!ao->probing) {
MP_ERR(ao, "thread_init failed!\n");
}
} else {
MP_VERBOSE(ao, "Init Done!\n");
if (setup_buffers(state))
MP_ERR(ao, "buffer setup failed!\n");
}
return state->init_ret;
}
static int control(struct ao *ao, enum aocontrol cmd, void *arg)
{
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
if (!(state->vol_hw_support & ENDPOINT_HARDWARE_SUPPORT_VOLUME))
return CONTROL_UNKNOWN; /* hw does not support volume controls in exclusive mode */
ao_control_vol_t *vol = (ao_control_vol_t *)arg;
ResetEvent(state->hDoneVol);
switch (cmd) {
case AOCONTROL_GET_VOLUME:
SetEvent(state->hGetvol);
if (WaitForSingleObject(state->hDoneVol, 100) == WAIT_OBJECT_0) {
vol->left = vol->right = 100.0f * state->audio_volume;
return CONTROL_OK;
}
return CONTROL_UNKNOWN;
case AOCONTROL_SET_VOLUME:
state->audio_volume = vol->left / 100.f;
SetEvent(state->hSetvol);
if (WaitForSingleObject(state->hDoneVol, 100) == WAIT_OBJECT_0)
return CONTROL_OK;
return CONTROL_UNKNOWN;
default:
return CONTROL_UNKNOWN;
}
}
static void audio_resume(struct ao *ao)
{
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
ResetEvent(state->hPause);
ResetEvent(state->hReset);
SetEvent(state->hPlay);
}
static void audio_pause(struct ao *ao)
{
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
ResetEvent(state->hPlay);
SetEvent(state->hPause);
}
static void reset(struct ao *ao)
{
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
ResetEvent(state->hPlay);
SetEvent(state->hReset);
reset_buffers(state);
}
static int play(struct ao *ao, void **data, int samples, int flags)
{
if (!ao || !ao->priv)
return 0;
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
if (WaitForSingleObject(state->fatal_error, 0) == WAIT_OBJECT_0) {
/* something bad happened */
return 0;
}
int ret = mp_ring_write(state->ringbuff, data[0], samples * ao->sstride);
state->final_chunk |= flags & AOPLAY_FINAL_CHUNK;
if (!state->is_playing) {
/* start playing */
state->is_playing = 1;
SetEvent(state->hPlay);
}
return ret / ao->sstride;
}
static float get_device_delay(struct wasapi_state *state) {
/* where we pray that sample_count hasn't desynced */
mp_memory_barrier();
UINT64 sample_count = state->sample_count;
UINT64 position, qpc_position;
HRESULT hr;
switch (hr = IAudioClock_GetPosition(state->pAudioClock, &position, &qpc_position)) {
case S_OK: case S_FALSE:
break;
default:
MP_ERR(state, "IAudioClock::GetPosition returned %s\n", explain_err(hr));
}
LARGE_INTEGER qpc_count;
QueryPerformanceCounter(&qpc_count);
UINT64 qpc_diff = (qpc_count.QuadPart * 10000000 / state->qpc_frequency.QuadPart) - qpc_position;
position += state->clock_frequency * qpc_diff / 10000000;
/* convert position to the same base as sample_count */
position = position * state->format.Format.nSamplesPerSec / state->clock_frequency;
uint32_t diff = sample_count - position;
float delay = diff / (float)state->format.Format.nSamplesPerSec;
MP_TRACE(state, "device delay: %"PRIu32" samples (%g ms)\n", diff, delay * 1000);
return delay;
}
static float get_delay(struct ao *ao)
{
if (!ao || !ao->priv)
return -1.0f;
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
return get_device_delay(state) +
(float)(RING_BUFFER_COUNT * state->buffer_block_size - get_space(ao) * ao->sstride) /
(float)state->format.Format.nAvgBytesPerSec;
}
#define OPT_BASE_STRUCT struct wasapi_state
const struct ao_driver audio_out_wasapi = {
.description = "Windows WASAPI audio output (event mode)",
.name = "wasapi",
.init = init,
.uninit = uninit,
.control = control,
.get_space = get_space,
.play = play,
.get_delay = get_delay,
.pause = audio_pause,
.resume = audio_resume,
.reset = reset,
.priv_size = sizeof(wasapi_state),
.options = (const struct m_option[]) {
OPT_FLAG("exclusive", opt_exclusive, 0),
OPT_FLAG("list", opt_list, 0),
OPT_STRING_VALIDATE("device", opt_device, 0, validate_device),
{NULL},
},
};
Reference in New Issue View Git Blame Copy Permalink