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4dbca8df09
So far, we have been completely discarding the values of latency-time and buffer-time and trying to always open the device in the lowest latency mode possible. However, sometimes this is a bad idea: 1. When we want to save power/CPU and don't want low latency 2. When the lowest latency setting causes glitches 3. Other audio-driver bugs Now we will try to follow the user-set values of latency-time and buffer-time in shared mode, and only latency-time in exclusive mode (we have no control over the hardware buffer size, and there is no use in setting GstAudioRingBuffer size to something larger). The elements will still try to open the devices in the lowest latency mode possible if you set the "low-latency" property to "true". https://bugzilla.gnome.org/show_bug.cgi?id=793289
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*
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* Copyright (C) 2008 Ole André Vadla Ravnås <ole.andre.ravnas@tandberg.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_WASAPI_SRC_H__
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#define __GST_WASAPI_SRC_H__
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#include "gstwasapiutil.h"
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G_BEGIN_DECLS
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#define GST_TYPE_WASAPI_SRC \
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(gst_wasapi_src_get_type ())
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#define GST_WASAPI_SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_WASAPI_SRC, GstWasapiSrc))
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#define GST_WASAPI_SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_WASAPI_SRC, GstWasapiSrcClass))
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#define GST_IS_WASAPI_SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_WASAPI_SRC))
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#define GST_IS_WASAPI_SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_WASAPI_SRC))
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typedef struct _GstWasapiSrc GstWasapiSrc;
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typedef struct _GstWasapiSrcClass GstWasapiSrcClass;
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struct _GstWasapiSrc
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{
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GstAudioSrc parent;
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IMMDevice *device;
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IAudioClient *client;
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IAudioClock *client_clock;
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guint64 client_clock_freq;
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IAudioCaptureClient *capture_client;
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HANDLE event_handle;
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HANDLE thread_priority_handle;
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/* Actual size of the allocated buffer */
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guint buffer_frame_count;
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/* The mix format that wasapi prefers in shared mode */
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WAVEFORMATEX *mix_format;
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/* The probed caps that we can accept */
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GstCaps *cached_caps;
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/* The channel positions in the data read from the device
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* we will pass this to GstAudioRingbuffer so it can
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* translate it to the native GStreamer channel layout. */
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GstAudioChannelPosition *positions;
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/* properties */
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gint role;
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gint sharemode;
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gboolean low_latency;
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wchar_t *device_strid;
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};
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struct _GstWasapiSrcClass
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{
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GstAudioSrcClass parent_class;
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};
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GType gst_wasapi_src_get_type (void);
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G_END_DECLS
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#endif /* __GST_WASAPI_SRC_H__ */
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