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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/>.
*/
#ifndef MP_AO_WASAPI_H_
#define MP_AO_WASAPI_H_
#include <stdlib.h>
#include <stdbool.h>
#include <windows.h>
#include <mmdeviceapi.h>
#include <audioclient.h>
#include <audiopolicy.h>
#include <endpointvolume.h>
#include "common/msg.h"
#include "osdep/atomics.h"
#include "internal.h"
#include "ao.h"
typedef struct change_notify {
IMMNotificationClient client; // this must be first in the structure!
IMMDeviceEnumerator *pEnumerator; // object where client is registered
LPWSTR monitored; // Monitored device
bool is_hotplug;
struct ao *ao;
} change_notify;
HRESULT wasapi_change_init(struct ao* ao, bool is_hotplug);
void wasapi_change_uninit(struct ao* ao);
#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)
enum wasapi_thread_state {
WASAPI_THREAD_FEED = 0,
WASAPI_THREAD_RESUME,
WASAPI_THREAD_RESET,
WASAPI_THREAD_SHUTDOWN
};
typedef struct wasapi_state {
struct mp_log *log;
// Thread handles
HRESULT init_ret; // status of init phase
HANDLE hInitDone; // set when init is complete in audio thread
HANDLE hAudioThread; // the audio thread itself
HANDLE hWake; // thread wakeup event
atomic_int thread_state; // enum wasapi_thread_state (what to do on wakeup)
// for setting the audio thread priority
HANDLE hTask;
// ID of the device to use
LPWSTR deviceID;
// WASAPI object handles owned and used by audio thread
IMMDevice *pDevice;
IAudioClient *pAudioClient;
IAudioRenderClient *pRenderClient;
// WASAPI internal clock information, for estimating delay
IAudioClock *pAudioClock;
atomic_ullong sample_count; // samples per channel written by GetBuffer
UINT64 clock_frequency; // scale for position returned by GetPosition
LARGE_INTEGER qpc_frequency; // frequency of Windows' high resolution timer
// WASAPI control (handles owned by audio thread but used by main thread)
IAudioSessionControl *pSessionControl; // setting the stream title
IAudioEndpointVolume *pEndpointVolume; // exclusive mode volume/mute
ISimpleAudioVolume *pAudioVolume; // shared mode volume/mute
DWORD vol_hw_support; // is hardware volume supported for exclusive-mode?
// Streams used to marshal the proxy objects. The thread owning the actual
// objects needs to marshal proxy objects into these streams, and the thread
// that wants the proxies unmarshals them from here.
IStream *sSessionControl;
IStream *sEndpointVolume;
IStream *sAudioVolume;
// WASAPI proxy handles, for Single-Threaded Apartment communication. One is
// needed for each audio thread object that's accessed from the main thread.
IAudioSessionControl *pSessionControlProxy;
IAudioEndpointVolume *pEndpointVolumeProxy;
ISimpleAudioVolume *pAudioVolumeProxy;
// ao options
int opt_exclusive;
int opt_list;
char *opt_device;
// format info
WAVEFORMATEXTENSIBLE format;
AUDCLNT_SHAREMODE share_mode; // AUDCLNT_SHAREMODE_EXCLUSIVE / SHARED
UINT32 bufferFrameCount; // number of frames in buffer
change_notify change;
} wasapi_state;
char *mp_GUID_to_str_buf(char *buf, size_t buf_size, const GUID *guid);
char *mp_PKEY_to_str_buf(char *buf, size_t buf_size, const PROPERTYKEY *pkey);
char *mp_HRESULT_to_str_buf(char *buf, size_t buf_size, HRESULT hr);
#define mp_GUID_to_str(guid) mp_GUID_to_str_buf((char[40]){0}, 40, (guid))
#define mp_PKEY_to_str(pkey) mp_PKEY_to_str_buf((char[42]){0}, 42, (pkey))
#define mp_HRESULT_to_str(hr) mp_HRESULT_to_str_buf((char[60]){0}, 60, (hr))
#define mp_LastError_to_str() mp_HRESULT_to_str(HRESULT_FROM_WIN32(GetLastError()))
void wasapi_list_devs(struct ao *ao, struct ao_device_list *list);
LPWSTR find_deviceID(struct ao *ao);
void wasapi_dispatch(struct ao *ao);
HRESULT wasapi_thread_init(struct ao *ao);
void wasapi_thread_uninit(struct ao *ao);
void wasapi_receive_proxies(wasapi_state *state);
void wasapi_release_proxies(wasapi_state *state);
#endif
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