mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-07 18:14:35 +00:00
995059dc87
The AudioClient3 API is only available on Windows 10, and we will automatically detect when it is available and use it. However, using it for capturing audio with low latency and without glitches seems to require setting the realtime priority of the entire pipeline to "critical", which we cannot do from inside the element. Hence, we can only enable that by default for wasapisink since apps should be able to safely set the low-latency property to TRUE if they need low-latency capture or playback.
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2008 Ole André Vadla Ravnås <ole.andre.ravnas@tandberg.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __GST_WASAPI_SRC_H__
|
|
#define __GST_WASAPI_SRC_H__
|
|
|
|
#include "gstwasapiutil.h"
|
|
|
|
G_BEGIN_DECLS
|
|
#define GST_TYPE_WASAPI_SRC \
|
|
(gst_wasapi_src_get_type ())
|
|
#define GST_WASAPI_SRC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_WASAPI_SRC, GstWasapiSrc))
|
|
#define GST_WASAPI_SRC_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_WASAPI_SRC, GstWasapiSrcClass))
|
|
#define GST_IS_WASAPI_SRC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_WASAPI_SRC))
|
|
#define GST_IS_WASAPI_SRC_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_WASAPI_SRC))
|
|
typedef struct _GstWasapiSrc GstWasapiSrc;
|
|
typedef struct _GstWasapiSrcClass GstWasapiSrcClass;
|
|
|
|
struct _GstWasapiSrc
|
|
{
|
|
GstAudioSrc parent;
|
|
|
|
IMMDevice *device;
|
|
IAudioClient *client;
|
|
IAudioClock *client_clock;
|
|
guint64 client_clock_freq;
|
|
IAudioCaptureClient *capture_client;
|
|
HANDLE event_handle;
|
|
HANDLE thread_priority_handle;
|
|
|
|
/* Actual size of the allocated buffer */
|
|
guint buffer_frame_count;
|
|
/* The mix format that wasapi prefers in shared mode */
|
|
WAVEFORMATEX *mix_format;
|
|
/* The probed caps that we can accept */
|
|
GstCaps *cached_caps;
|
|
/* The channel positions in the data read from the device
|
|
* we will pass this to GstAudioRingbuffer so it can
|
|
* translate it to the native GStreamer channel layout. */
|
|
GstAudioChannelPosition *positions;
|
|
|
|
/* properties */
|
|
gint role;
|
|
gint sharemode;
|
|
gboolean low_latency;
|
|
gboolean try_audioclient3;
|
|
wchar_t *device_strid;
|
|
};
|
|
|
|
struct _GstWasapiSrcClass
|
|
{
|
|
GstAudioSrcClass parent_class;
|
|
};
|
|
|
|
GType gst_wasapi_src_get_type (void);
|
|
|
|
G_END_DECLS
|
|
#endif /* __GST_WASAPI_SRC_H__ */
|