1 /* 2 * Copyright (C) 2008 Ole André Vadla Ravnås <ole.andre.ravnas@tandberg.com> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public 15 * License along with this library; if not, write to the 16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef __GST_WASAPI_SRC_H__ 21 #define __GST_WASAPI_SRC_H__ 22 23 #include "gstwasapiutil.h" 24 25 G_BEGIN_DECLS 26 #define GST_TYPE_WASAPI_SRC \ 27 (gst_wasapi_src_get_type ()) 28 #define GST_WASAPI_SRC(obj) \ 29 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_WASAPI_SRC, GstWasapiSrc)) 30 #define GST_WASAPI_SRC_CLASS(klass) \ 31 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_WASAPI_SRC, GstWasapiSrcClass)) 32 #define GST_IS_WASAPI_SRC(obj) \ 33 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_WASAPI_SRC)) 34 #define GST_IS_WASAPI_SRC_CLASS(klass) \ 35 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_WASAPI_SRC)) 36 typedef struct _GstWasapiSrc GstWasapiSrc; 37 typedef struct _GstWasapiSrcClass GstWasapiSrcClass; 38 39 struct _GstWasapiSrc 40 { 41 GstAudioSrc parent; 42 43 GstMMDeviceEnumerator *enumerator; 44 45 IMMDevice *device; 46 IAudioClient *client; 47 IAudioClock *client_clock; 48 guint64 client_clock_freq; 49 IAudioCaptureClient *capture_client; 50 HANDLE event_handle; 51 HANDLE cancellable; 52 /* Smooth frames captured from WASAPI, which can be irregular sometimes */ 53 GstAdapter *adapter; 54 /* Client was reset, so it needs to be started again */ 55 gboolean client_needs_restart; 56 57 /* The mix format that wasapi prefers in shared mode */ 58 WAVEFORMATEX *mix_format; 59 /* The probed caps that we can accept */ 60 GstCaps *cached_caps; 61 /* The channel positions in the data read from the device 62 * we will pass this to GstAudioRingbuffer so it can 63 * translate it to the native GStreamer channel layout. */ 64 GstAudioChannelPosition *positions; 65 66 /* Used for loopback use case in order to keep feeding silence into client */ 67 IAudioClient *loopback_client; 68 IAudioRenderClient *loopback_render_client; 69 GThread *loopback_thread; 70 HANDLE loopback_event_handle; 71 HANDLE loopback_cancellable; 72 73 /* properties */ 74 gint role; 75 gint sharemode; 76 gboolean loopback; 77 gboolean low_latency; 78 gboolean try_audioclient3; 79 wchar_t *device_strid; 80 }; 81 82 struct _GstWasapiSrcClass 83 { 84 GstAudioSrcClass parent_class; 85 }; 86 87 GType gst_wasapi_src_get_type (void); 88 89 G_END_DECLS 90 #endif /* __GST_WASAPI_SRC_H__ */ 91