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136 lines
5 KiB
C
136 lines
5 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstaudiosink.h:
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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_AUDIO_AUDIO_H__
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#include <gst/audio/audio.h>
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#endif
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#ifndef __GST_AUDIO_SINK_H__
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#define __GST_AUDIO_SINK_H__
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#include <gst/gst.h>
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#include <gst/audio/gstaudiobasesink.h>
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G_BEGIN_DECLS
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#define GST_TYPE_AUDIO_SINK (gst_audio_sink_get_type())
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#define GST_AUDIO_SINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_SINK,GstAudioSink))
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#define GST_AUDIO_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_SINK,GstAudioSinkClass))
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#define GST_AUDIO_SINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_AUDIO_SINK,GstAudioSinkClass))
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#define GST_IS_AUDIO_SINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_SINK))
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#define GST_IS_AUDIO_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_SINK))
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typedef struct _GstAudioSink GstAudioSink;
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typedef struct _GstAudioSinkClass GstAudioSinkClass;
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typedef struct _GstAudioSinkClassExtension GstAudioSinkClassExtension;
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/**
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* GstAudioSink:
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*
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* Opaque #GstAudioSink.
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*/
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struct _GstAudioSink {
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GstAudioBaseSink element;
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/*< private >*/ /* with LOCK */
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GThread *thread;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstAudioSinkClass:
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* @parent_class: the parent class structure.
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* @open: Open the device. No configuration needs to be done at this point.
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* This function is also used to check if the device is available.
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* @prepare: Prepare the device to operate with the specified parameters.
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* @unprepare: Undo operations done in prepare.
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* @close: Close the device.
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* @write: Write data to the device.
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* This vmethod is allowed to block until all the data is written.
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* If such is the case then it is expected that pause, stop and
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* reset will unblock the write when called.
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* @delay: Return how many frames are still in the device. Participates in
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* computing the time for audio clocks and drives the synchronisation.
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* @reset: Returns as quickly as possible from a write and flush any pending
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* samples from the device.
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* This vmethod is deprecated. Please provide pause and stop instead.
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* @pause: Pause the device and unblock write as fast as possible.
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* For retro compatibility, the audio sink will fallback
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* to calling reset if this vmethod is not provided. Since: 1.18
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* @resume: Resume the device. Since: 1.18
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* @stop: Stop the device and unblock write as fast as possible.
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* Pending samples are flushed from the device.
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* For retro compatibility, the audio sink will fallback
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* to calling reset if this vmethod is not provided. Since: 1.18
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* @extension: class extension structure. Since: 1.18
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*/
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struct _GstAudioSinkClass {
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GstAudioBaseSinkClass parent_class;
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/* vtable */
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/* open the device with given specs */
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gboolean (*open) (GstAudioSink *sink);
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/* prepare resources and state to operate with the given specs */
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gboolean (*prepare) (GstAudioSink *sink, GstAudioRingBufferSpec *spec);
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/* undo anything that was done in prepare() */
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gboolean (*unprepare) (GstAudioSink *sink);
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/* close the device */
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gboolean (*close) (GstAudioSink *sink);
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/* write samples to the device */
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gint (*write) (GstAudioSink *sink, gpointer data, guint length);
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/* get number of frames queued in the device */
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guint (*delay) (GstAudioSink *sink);
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/* deprecated: reset the audio device, unblock from a write */
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void (*reset) (GstAudioSink *sink);
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/* pause the audio device, unblock from a write */
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void (*pause) (GstAudioSink *sink);
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/* resume the audio device */
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void (*resume) (GstAudioSink *sink);
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/* stop the audio device, unblock from a write */
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void (*stop) (GstAudioSink *sink);
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GstAudioSinkClassExtension *extension;
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};
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/**
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* GstAudioSinkClassExtension:
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* @clear-all: Clear the device. Since: 1.18
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*/
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struct _GstAudioSinkClassExtension
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{
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/* clear the audio device */
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void (*clear_all) (GstAudioSink *sink);
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/* no padding needed */
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};
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GST_AUDIO_API
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GType gst_audio_sink_get_type(void);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAudioSink, gst_object_unref)
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G_END_DECLS
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#endif /* __GST_AUDIO_SINK_H__ */
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