gstreamer/gst-libs/gst/app/gstappsrc.h
2017-12-09 11:09:16 +00:00

192 lines
6.3 KiB
C

/* GStreamer
* Copyright (C) 2007 David Schleef <ds@schleef.org>
*
* 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_APP_SRC_H_
#define _GST_APP_SRC_H_
#include <gst/gst.h>
#include <gst/base/gstpushsrc.h>
#include <gst/app/app-enumtypes.h>
G_BEGIN_DECLS
#define GST_TYPE_APP_SRC \
(gst_app_src_get_type())
#define GST_APP_SRC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_APP_SRC,GstAppSrc))
#define GST_APP_SRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_APP_SRC,GstAppSrcClass))
#define GST_IS_APP_SRC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_APP_SRC))
#define GST_IS_APP_SRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_APP_SRC))
#define GST_APP_SRC_CAST(obj) \
((GstAppSrc*)(obj))
typedef struct _GstAppSrc GstAppSrc;
typedef struct _GstAppSrcClass GstAppSrcClass;
typedef struct _GstAppSrcPrivate GstAppSrcPrivate;
/* FIXME 2.0: Make the instance/class struct private */
/**
* GstAppSrcCallbacks: (skip)
* @need_data: Called when the appsrc needs more data. A buffer or EOS should be
* pushed to appsrc from this thread or another thread. @length is just a hint
* and when it is set to -1, any number of bytes can be pushed into @appsrc.
* @enough_data: Called when appsrc has enough data. It is recommended that the
* application stops calling push-buffer until the need_data callback is
* emitted again to avoid excessive buffer queueing.
* @seek_data: Called when a seek should be performed to the offset.
* The next push-buffer should produce buffers from the new @offset.
* This callback is only called for seekable stream types.
*
* A set of callbacks that can be installed on the appsrc with
* gst_app_src_set_callbacks().
*/
typedef struct {
void (*need_data) (GstAppSrc *src, guint length, gpointer user_data);
void (*enough_data) (GstAppSrc *src, gpointer user_data);
gboolean (*seek_data) (GstAppSrc *src, guint64 offset, gpointer user_data);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
} GstAppSrcCallbacks;
/**
* GstAppStreamType:
* @GST_APP_STREAM_TYPE_STREAM: No seeking is supported in the stream, such as a
* live stream.
* @GST_APP_STREAM_TYPE_SEEKABLE: The stream is seekable but seeking might not
* be very fast, such as data from a webserver.
* @GST_APP_STREAM_TYPE_RANDOM_ACCESS: The stream is seekable and seeking is fast,
* such as in a local file.
*
* The stream type.
*/
typedef enum
{
GST_APP_STREAM_TYPE_STREAM,
GST_APP_STREAM_TYPE_SEEKABLE,
GST_APP_STREAM_TYPE_RANDOM_ACCESS
} GstAppStreamType;
struct _GstAppSrc
{
GstBaseSrc basesrc;
/*< private >*/
GstAppSrcPrivate *priv;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
struct _GstAppSrcClass
{
GstBaseSrcClass basesrc_class;
/* signals */
void (*need_data) (GstAppSrc *appsrc, guint length);
void (*enough_data) (GstAppSrc *appsrc);
gboolean (*seek_data) (GstAppSrc *appsrc, guint64 offset);
/* actions */
GstFlowReturn (*push_buffer) (GstAppSrc *appsrc, GstBuffer *buffer);
GstFlowReturn (*end_of_stream) (GstAppSrc *appsrc);
GstFlowReturn (*push_sample) (GstAppSrc *appsrc, GstSample *sample);
GstFlowReturn (*push_buffer_list) (GstAppSrc *appsrc, GstBufferList *buffer_list);
/*< private >*/
gpointer _gst_reserved[GST_PADDING-2];
};
GST_EXPORT
GType gst_app_src_get_type (void);
GST_EXPORT
void gst_app_src_set_caps (GstAppSrc *appsrc, const GstCaps *caps);
GST_EXPORT
GstCaps* gst_app_src_get_caps (GstAppSrc *appsrc);
GST_EXPORT
void gst_app_src_set_size (GstAppSrc *appsrc, gint64 size);
GST_EXPORT
gint64 gst_app_src_get_size (GstAppSrc *appsrc);
GST_EXPORT
void gst_app_src_set_duration (GstAppSrc *appsrc, GstClockTime duration);
GST_EXPORT
GstClockTime gst_app_src_get_duration (GstAppSrc *appsrc);
GST_EXPORT
void gst_app_src_set_stream_type (GstAppSrc *appsrc, GstAppStreamType type);
GST_EXPORT
GstAppStreamType gst_app_src_get_stream_type (GstAppSrc *appsrc);
GST_EXPORT
void gst_app_src_set_max_bytes (GstAppSrc *appsrc, guint64 max);
GST_EXPORT
guint64 gst_app_src_get_max_bytes (GstAppSrc *appsrc);
GST_EXPORT
guint64 gst_app_src_get_current_level_bytes (GstAppSrc *appsrc);
GST_EXPORT
void gst_app_src_set_latency (GstAppSrc *appsrc, guint64 min, guint64 max);
GST_EXPORT
void gst_app_src_get_latency (GstAppSrc *appsrc, guint64 *min, guint64 *max);
GST_EXPORT
void gst_app_src_set_emit_signals (GstAppSrc *appsrc, gboolean emit);
GST_EXPORT
gboolean gst_app_src_get_emit_signals (GstAppSrc *appsrc);
GST_EXPORT
GstFlowReturn gst_app_src_push_buffer (GstAppSrc *appsrc, GstBuffer *buffer);
GST_EXPORT
GstFlowReturn gst_app_src_push_buffer_list (GstAppSrc * appsrc, GstBufferList * buffer_list);
GST_EXPORT
GstFlowReturn gst_app_src_end_of_stream (GstAppSrc *appsrc);
GST_EXPORT
GstFlowReturn gst_app_src_push_sample (GstAppSrc *appsrc, GstSample *sample);
GST_EXPORT
void gst_app_src_set_callbacks (GstAppSrc * appsrc,
GstAppSrcCallbacks *callbacks,
gpointer user_data,
GDestroyNotify notify);
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAppSrc, gst_object_unref)
#endif
G_END_DECLS
#endif