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mpv/audio/out/ao_wasapi0.c

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/*
* This file is part of mpv.
*
* 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 "config.h"
#include "core/subopt-helper.h"
#include "audio/format.h"
#include "core/mp_msg.h"
#include "core/mp_ring.h"
#include "ao.h"
#ifndef BASE_SEARCH_PATH_ENABLE_SAFE_SEARCHMODE
#define BASE_SEARCH_PATH_ENABLE_SAFE_SEARCHMODE 0x00000001
#endif
#define RING_BUFFER_COUNT 64
/* 20 millisecond buffer? */
#define BUFFER_TIME 20000000.0
#define EXIT_ON_ERROR(hres) \
if (FAILED(hres)) { goto exit_label; }
/* 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}
};
typedef struct wasapi0_state {
HANDLE threadLoop;
/* Init phase */
int init_ret;
HANDLE init_done;
HANDLE fatal_error; /* signal to indicate unrecoverable error */
/* Events */
HANDLE hPause;
/* Play */
HANDLE hPlay;
int is_playing;
/* Reset */
HANDLE hReset;
/* uninit */
HANDLE hUninit;
LONG immed;
/* volume control */
HANDLE hGetvol, hSetvol, hDoneVol;
DWORD vol_hw_support, status;
float audio_volume;
/* Prints, for in case line buffers are disabled */
CRITICAL_SECTION print_lock;
/* 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 */
IMMDeviceEnumerator *pEnumerator;
IMMDevice *pDevice;
IAudioClient *pAudioClient;
IAudioRenderClient *pRenderClient;
IAudioEndpointVolume *pEndpointVolume;
HANDLE hFeed; /* wasapi event */
HANDLE hTask; /* AV thread */
DWORD taskIndex; /* AV task ID */
WAVEFORMATEXTENSIBLE format;
/* 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;
} wasapi0_state;
static int fill_VistaBlob(wasapi0_state *state)
{
if (!state)
return 1;
HMODULE hkernel32 = GetModuleHandleW(L"kernel32.dll");
if (!hkernel32)
return 1;
WINBOOL (WINAPI *pSetDllDirectory)(LPCWSTR lpPathName) =
(WINBOOL (WINAPI *)(LPCWSTR))GetProcAddress(hkernel32, "SetDllDirectoryW");
WINBOOL (WINAPI *pSetSearchPathMode)(DWORD Flags) =
(WINBOOL (WINAPI *)(DWORD))GetProcAddress(hkernel32, "SetSearchPathMode");
if (pSetSearchPathMode)
pSetDllDirectory(L""); /* Attempt to use safe search paths */
if (pSetSearchPathMode)
pSetSearchPathMode(BASE_SEARCH_PATH_ENABLE_SAFE_SEARCHMODE);
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);
if (pSetSearchPathMode)
pSetDllDirectory(NULL);
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 */
wformat->SubFormat = local_KSDATAFORMAT_SUBTYPE_PCM;
wformat->Samples.wValidBitsPerSample = wformat->Format.wBitsPerSample;
wformat->dwChannelMask = chanmask;
}
static HRESULT check_support(struct wasapi0_state *state,
const WAVEFORMATEXTENSIBLE *wformat)
{
HRESULT hr = IAudioClient_IsFormatSupported(state->pAudioClient,
AUDCLNT_SHAREMODE_EXCLUSIVE,
&(wformat->Format), NULL);
if (hr != S_OK) {
EnterCriticalSection(&state->print_lock);
mp_msg(
MSGT_AO, MSGL_ERR,
"IAudioClient::IsFormatSupported failed with %s (%d at %"PRId32"Hz %dchannels, channelmask = %"PRIx32")\n",
explain_err(
hr), wformat->Format.wBitsPerSample,
wformat->Format.nSamplesPerSec,
wformat->Format.nChannels, wformat->dwChannelMask);
LeaveCriticalSection(&state->print_lock);
}
return hr;
}
static int enum_formats(struct ao *const ao)
{
WAVEFORMATEXTENSIBLE wformat;
DWORD chanmask;
int bytes_per_sample;
struct wasapi0_state *state = (struct wasapi0_state *)ao->priv;
/* 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
*/
switch (ao->format) {
case AF_FORMAT_S24_LE:
bytes_per_sample = 3;
break;
case AF_FORMAT_S16_LE:
bytes_per_sample = 2;
break;
default:
bytes_per_sample = 0; /* unsupported, fail it */
}
chanmask = mp_chmap_to_waveext(&ao->channels);
set_format(&wformat, bytes_per_sample, ao->samplerate, ao->channels.num, chanmask);
/* See if chosen format works */
if (check_support(state, &wformat) == S_OK) {
state->format = wformat;
ao->bps = wformat.Format.nAvgBytesPerSec;
return 0;
} else { /* Try default, 16bit @ 44.1kHz */
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_WARN, "Trying 16LE at 44100Hz\n");
LeaveCriticalSection(&state->print_lock);
set_format(&wformat, 2, 44100, ao->channels.num, chanmask);
if (check_support(state, &wformat) == S_OK) {
ao->samplerate = wformat.Format.nSamplesPerSec;
ao->bps = wformat.Format.nAvgBytesPerSec;
ao->format = AF_FORMAT_S16_LE;
state->format = wformat;
return 0;
} else { /* Poor quality hardware? Try stereo mode */
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_WARN, "Trying Stereo\n");
LeaveCriticalSection(&state->print_lock);
mp_chmap_from_channels(&ao->channels, 2);
wformat.Format.nChannels = 2;
set_format(&wformat, 2, 44100, ao->channels.num,
mp_chmap_to_waveext(&ao->channels));
if (check_support(state, &wformat) == S_OK) {
ao->samplerate = wformat.Format.nSamplesPerSec;
ao->bps = wformat.Format.nAvgBytesPerSec;
ao->format = AF_FORMAT_S16_LE;
state->format = wformat;
return 0;
}
}
}
return -1;
}
static int fix_format(struct wasapi0_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,
AUDCLNT_SHAREMODE_EXCLUSIVE,
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) {
EnterCriticalSection(&state->print_lock);
mp_msg(
MSGT_AO, MSGL_ERR,
"IAudioClient::Initialize negotiation failed with %s, used %lld * 100ns\n",
explain_err(hr), state->defaultRequestedDuration);
LeaveCriticalSection(&state->print_lock);
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.nBlockAlign *
state->bufferFrameCount;
state->hTask =
state->VistaBlob.pAvSetMmThreadCharacteristicsW(L"Pro Audio", &state->taskIndex);
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_V,
"ao-wasapi: fix_format OK, using %lld byte buffer block size!\n",
(long long) state->buffer_block_size);
LeaveCriticalSection(&state->print_lock);
return 0;
exit_label:
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_ERR,
"ao-wasapi: fix_format fails with %s, failed to determine buffer block size!\n",
explain_err(hr));
LeaveCriticalSection(&state->print_lock);
SetEvent(state->fatal_error);
return 1;
}
static int thread_init(struct ao *ao)
{
struct wasapi0_state *state = (struct wasapi0_state *)ao->priv;
HRESULT hr;
CoInitialize(NULL);
hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
&IID_IMMDeviceEnumerator, (void **)&state->pEnumerator);
EXIT_ON_ERROR(hr)
hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(state->pEnumerator,
eRender, eConsole,
&state->pDevice);
EXIT_ON_ERROR(hr)
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 = enum_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 */
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_V, "ao-wasapi: thread_init OK!\n");
LeaveCriticalSection(&state->print_lock);
SetEvent(state->init_done);
return state->init_ret;
}
exit_label:
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_ERR, "ao-wasapi: thread_init failed!\n");
LeaveCriticalSection(&state->print_lock);
state->init_ret = -1;
SetEvent(state->init_done);
return -1;
}
static void thread_pause(wasapi0_state *state)
{
state->is_playing = 0;
IAudioClient_Stop(state->pAudioClient);
}
/* force_feed - feed in even if available data is smaller than required buffer, to clear the buffer */
static void thread_feed(wasapi0_state *state,int force_feed)
{
BYTE *pData;
int buffer_size;
HRESULT hr = IAudioRenderClient_GetBuffer(state->pRenderClient,
state->bufferFrameCount, &pData);
EXIT_ON_ERROR(hr)
buffer_size = mp_ring_buffered(state->ringbuff);
if( buffer_size > state->buffer_block_size) { /* OK to copy! */
mp_ring_read(state->ringbuff, (unsigned char *)pData,
state->buffer_block_size);
} else if(force_feed) {
/* should be smaller than buffer block size by now */
memset(pData,0,state->buffer_block_size);
mp_ring_read(state->ringbuff, (unsigned char *)pData, buffer_size);
} else {
/* buffer underrun?! abort */
hr = IAudioRenderClient_ReleaseBuffer(state->pRenderClient,
state->bufferFrameCount,
AUDCLNT_BUFFERFLAGS_SILENT);
EXIT_ON_ERROR(hr)
return;
}
hr = IAudioRenderClient_ReleaseBuffer(state->pRenderClient,
state->bufferFrameCount, 0);
EXIT_ON_ERROR(hr)
return;
exit_label:
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_ERR, "ao-wasapi: thread_feed fails with %"PRIx32"!\n", hr);
LeaveCriticalSection(&state->print_lock);
return;
}
static void thread_play(wasapi0_state *state)
{
thread_feed(state, 0);
state->is_playing = 1;
IAudioClient_Start(state->pAudioClient);
return;
}
static void thread_reset(wasapi0_state *state)
{
IAudioClient_Stop(state->pAudioClient);
IAudioClient_Reset(state->pAudioClient);
if (state->is_playing) {
thread_play(state);
}
}
static void thread_getVol(wasapi0_state *state)
{
IAudioEndpointVolume_GetMasterVolumeLevelScalar(state->pEndpointVolume,
&state->audio_volume);
SetEvent(state->hDoneVol);
}
static void thread_setVol(wasapi0_state *state)
{
IAudioEndpointVolume_SetMasterVolumeLevelScalar(state->pEndpointVolume,
state->audio_volume, NULL);
SetEvent(state->hDoneVol);
}
static void thread_uninit(wasapi0_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->pAudioClient)
IAudioClient_Release(state->pAudioClient);
if (state->pEnumerator)
IMMDeviceEnumerator_Release(state->pEnumerator);
if (state->pDevice)
IMMDevice_Release(state->pDevice);
if (state->hTask)
state->VistaBlob.pAvRevertMmThreadCharacteristics(state->hTask);
CoUninitialize();
ExitThread(0);
}
static unsigned int __stdcall ThreadLoop(void *lpParameter)
{
struct ao *ao = lpParameter;
int feedwatch = 0;
if (!ao || !ao->priv)
return -1;
struct wasapi0_state *state = (struct wasapi0_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};
EnterCriticalSection(&state->print_lock);
mp_msg(MSGT_AO, MSGL_V, "ao-wasapi: Entering dispatch loop!\n");
LeaveCriticalSection(&state->print_lock);
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 */
feedwatch = 1;
thread_feed(state, 0);
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 wasapi0_state *state = (struct wasapi0_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 wasapi0_state *state = (struct wasapi0_state *)ao->priv;
return mp_ring_available(state->ringbuff);
}
static void reset_buffers(struct wasapi0_state *state)
{
mp_ring_reset(state->ringbuff);
}
static int setup_buffers(struct wasapi0_state *state)
{
state->ringbuff =
mp_ring_new(state, RING_BUFFER_COUNT * state->buffer_block_size);
return !state->ringbuff;
}
static void uninit(struct ao *ao, bool immed)
{
mp_msg(MSGT_AO, MSGL_V, "ao-wasapi0: uninit!\n");
struct wasapi0_state *state = (struct wasapi0_state *)ao->priv;
state->immed = immed;
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);
DeleteCriticalSection(&state->print_lock);
talloc_free(state);
ao->priv = NULL;
mp_msg(MSGT_AO, MSGL_V, "ao-wasapi0: uninit END!\n");
}
static int init(struct ao *ao, char *params)
{
mp_msg(MSGT_AO, MSGL_V, "ao-wasapi0: init!\n");
struct mp_chmap_sel sel = {0};
mp_chmap_sel_add_waveext(&sel);
if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels))
return -1;
struct wasapi0_state *state = talloc_zero(ao, struct wasapi0_state);
if (!state)
return -1;
ao->priv = (void *)state;
fill_VistaBlob(state);
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 */
InitializeCriticalSection(&state->print_lock);
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_msg(MSGT_AO, MSGL_ERR, "ao-wasapi0: fail to create thread!\n");
return -1;
}
WaitForSingleObject(state->init_done, INFINITE); /* wait on init complete */
mp_msg(MSGT_AO, MSGL_V, "ao-wasapi0: Init Done!\n");
if (setup_buffers(state))
mp_msg(MSGT_AO, MSGL_ERR, "ao-wasapi0: buffer setup failed!\n");
return state->init_ret;
}
static int control(struct ao *ao, enum aocontrol cmd, void *arg)
{
struct wasapi0_state *state = (struct wasapi0_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 wasapi0_state *state = (struct wasapi0_state *)ao->priv;
ResetEvent(state->hPause);
ResetEvent(state->hReset);
SetEvent(state->hPlay);
}
static void audio_pause(struct ao *ao)
{
struct wasapi0_state *state = (struct wasapi0_state *)ao->priv;
ResetEvent(state->hPlay);
SetEvent(state->hPause);
}
static void reset(struct ao *ao)
{
struct wasapi0_state *state = (struct wasapi0_state *)ao->priv;
ResetEvent(state->hPlay);
SetEvent(state->hReset);
reset_buffers(state);
}
static int play(struct ao *ao, void *data, int len, int flags)
{
int ret = 0;
if (!ao || !ao->priv)
return ret;
struct wasapi0_state *state = (struct wasapi0_state *)ao->priv;
if (WaitForSingleObject(state->fatal_error, 0) == WAIT_OBJECT_0) {
/* something bad happened */
return ret;
}
ret = mp_ring_write(state->ringbuff, data, len);
if (!state->is_playing) {
/* start playing */
state->is_playing = 1;
SetEvent(state->hPlay);
}
return ret;
}
static float get_delay(struct ao *ao)
{
if (!ao || !ao->priv)
return -1.0f;
struct wasapi0_state *state = (struct wasapi0_state *)ao->priv;
return (float)(RING_BUFFER_COUNT * state->buffer_block_size - get_space(ao)) /
(float)state->format.Format.nAvgBytesPerSec;
}
const struct ao_driver audio_out_wasapi0 = {
.info = &(const struct ao_info) {
"Windows WASAPI audio output (event mode)",
"wasapi0",
"Jonathan Yong <10walls@gmail.com>",
""
},
.init = init,
.uninit = uninit,
.control = control,
.get_space = get_space,
.play = play,
.get_delay = get_delay,
.pause = audio_pause,
.resume = audio_resume,
.reset = reset,
};
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