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84a3c21beb
A COM message loop is apparently totally inappropriate for a low latency thread. It leads to audio glitches because the thread doesn't wake up fast enough when it should. It also causes mysterious correlations between the vo and ao thread (i.e., toggling fullscreen delays audio feed events). Instead use an mp_dispatch_queue to set/get volume/mute/session display name from the audio thread. This has the added benefit of obviating the need to marshal the associated interfaces from the audio thread.
121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
/*
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* This file is part of mpv.
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*
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* Original author: Jonathan Yong <10walls@gmail.com>
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MP_AO_WASAPI_H_
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#define MP_AO_WASAPI_H_
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#include <stdlib.h>
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#include <stdbool.h>
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#include <windows.h>
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#include <mmdeviceapi.h>
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#include <audioclient.h>
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#include <audiopolicy.h>
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#include <endpointvolume.h>
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#include "common/msg.h"
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#include "osdep/atomics.h"
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#include "osdep/windows_utils.h"
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#include "internal.h"
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#include "ao.h"
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typedef struct change_notify {
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IMMNotificationClient client; // this must be first in the structure!
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IMMDeviceEnumerator *pEnumerator; // object where client is registered
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LPWSTR monitored; // Monitored device
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bool is_hotplug;
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struct ao *ao;
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} change_notify;
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HRESULT wasapi_change_init(struct ao* ao, bool is_hotplug);
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void wasapi_change_uninit(struct ao* ao);
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#define EXIT_ON_ERROR(hres) \
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do { if (FAILED(hres)) { goto exit_label; } } while(0)
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#define SAFE_RELEASE(unk, release) \
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do { if ((unk) != NULL) { release; (unk) = NULL; } } while(0)
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enum wasapi_thread_state {
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WASAPI_THREAD_FEED = 0,
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WASAPI_THREAD_RESUME,
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WASAPI_THREAD_RESET,
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WASAPI_THREAD_SHUTDOWN
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};
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typedef struct wasapi_state {
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struct mp_log *log;
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// Thread handles
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HRESULT init_ret; // status of init phase
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HANDLE hInitDone; // set when init is complete in audio thread
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HANDLE hAudioThread; // the audio thread itself
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HANDLE hWake; // thread wakeup event
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atomic_int thread_state; // enum wasapi_thread_state (what to do on wakeup)
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struct mp_dispatch_queue *dispatch; // for volume/mute/session display
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// for setting the audio thread priority
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HANDLE hTask;
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// ID of the device to use
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LPWSTR deviceID;
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// WASAPI object handles owned and used by audio thread
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IMMDevice *pDevice;
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IAudioClient *pAudioClient;
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IAudioRenderClient *pRenderClient;
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// WASAPI internal clock information, for estimating delay
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IAudioClock *pAudioClock;
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atomic_ullong sample_count; // samples per channel written by GetBuffer
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UINT64 clock_frequency; // scale for position returned by GetPosition
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LARGE_INTEGER qpc_frequency; // frequency of Windows' high resolution timer
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// WASAPI control
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IAudioSessionControl *pSessionControl; // setting the stream title
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IAudioEndpointVolume *pEndpointVolume; // exclusive mode volume/mute
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ISimpleAudioVolume *pAudioVolume; // shared mode volume/mute
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DWORD vol_hw_support; // is hardware volume supported for exclusive-mode?
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// ao options
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int opt_exclusive;
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int opt_list;
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char *opt_device;
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// format info
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WAVEFORMATEXTENSIBLE format;
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AUDCLNT_SHAREMODE share_mode; // AUDCLNT_SHAREMODE_EXCLUSIVE / SHARED
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UINT32 bufferFrameCount; // number of frames in buffer
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change_notify change;
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} wasapi_state;
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char *mp_PKEY_to_str_buf(char *buf, size_t buf_size, const PROPERTYKEY *pkey);
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#define mp_PKEY_to_str(pkey) mp_PKEY_to_str_buf((char[42]){0}, 42, (pkey))
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void wasapi_list_devs(struct ao *ao, struct ao_device_list *list);
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bstr wasapi_get_specified_device_string(struct ao *ao);
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LPWSTR wasapi_find_deviceID(struct ao *ao);
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void wasapi_dispatch(struct ao *ao);
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HRESULT wasapi_thread_init(struct ao *ao);
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void wasapi_thread_uninit(struct ao *ao);
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void wasapi_receive_proxies(wasapi_state *state);
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void wasapi_release_proxies(wasapi_state *state);
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#endif
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