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02530e9d3e
This allows dropping the newest or oldest buffer when the internal queue is full instead of blocking or continuing to grow. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1133>
232 lines
7.5 KiB
C
232 lines
7.5 KiB
C
/* GStreamer
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* Copyright (C) 2007 David Schleef <ds@schleef.org>
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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_APP_SRC_H_
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#define _GST_APP_SRC_H_
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#include <gst/gst.h>
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#include <gst/base/gstpushsrc.h>
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#include <gst/app/app-prelude.h>
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#include <gst/app/app-enumtypes.h>
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G_BEGIN_DECLS
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#define GST_TYPE_APP_SRC \
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(gst_app_src_get_type())
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#define GST_APP_SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_APP_SRC,GstAppSrc))
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#define GST_APP_SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_APP_SRC,GstAppSrcClass))
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#define GST_IS_APP_SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_APP_SRC))
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#define GST_IS_APP_SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_APP_SRC))
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#define GST_APP_SRC_CAST(obj) \
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((GstAppSrc*)(obj))
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typedef struct _GstAppSrc GstAppSrc;
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typedef struct _GstAppSrcClass GstAppSrcClass;
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typedef struct _GstAppSrcPrivate GstAppSrcPrivate;
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/* FIXME 2.0: Make the instance/class struct private */
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/**
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* GstAppSrcCallbacks: (skip)
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* @need_data: Called when the appsrc needs more data. A buffer or EOS should be
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* pushed to appsrc from this thread or another thread. @length is just a hint
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* and when it is set to -1, any number of bytes can be pushed into @appsrc.
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* @enough_data: Called when appsrc has enough data. It is recommended that the
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* application stops calling push-buffer until the need_data callback is
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* emitted again to avoid excessive buffer queueing.
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* @seek_data: Called when a seek should be performed to the offset.
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* The next push-buffer should produce buffers from the new @offset.
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* This callback is only called for seekable stream types.
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*
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* A set of callbacks that can be installed on the appsrc with
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* gst_app_src_set_callbacks().
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*/
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typedef struct {
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void (*need_data) (GstAppSrc *src, guint length, gpointer user_data);
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void (*enough_data) (GstAppSrc *src, gpointer user_data);
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gboolean (*seek_data) (GstAppSrc *src, guint64 offset, gpointer user_data);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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} GstAppSrcCallbacks;
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/**
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* GstAppStreamType:
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* @GST_APP_STREAM_TYPE_STREAM: No seeking is supported in the stream, such as a
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* live stream.
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* @GST_APP_STREAM_TYPE_SEEKABLE: The stream is seekable but seeking might not
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* be very fast, such as data from a webserver.
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* @GST_APP_STREAM_TYPE_RANDOM_ACCESS: The stream is seekable and seeking is fast,
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* such as in a local file.
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*
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* The stream type.
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*/
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typedef enum
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{
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GST_APP_STREAM_TYPE_STREAM,
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GST_APP_STREAM_TYPE_SEEKABLE,
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GST_APP_STREAM_TYPE_RANDOM_ACCESS
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} GstAppStreamType;
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/**
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* GstAppLeakyType:
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* @GST_APP_LEAKY_TYPE_NONE: Not Leaky
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* @GST_APP_LEAKY_TYPE_UPSTREAM: Leaky on upstream (new buffers)
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* @GST_APP_LEAKY_TYPE_DOWNSTREAM: Leaky on downstream (old buffers)
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*
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* Buffer dropping scheme to avoid the element's internal queue to block when
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* full.
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*
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* Since: 1.20
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*/
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typedef enum {
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GST_APP_LEAKY_TYPE_NONE,
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GST_APP_LEAKY_TYPE_UPSTREAM,
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GST_APP_LEAKY_TYPE_DOWNSTREAM
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} GstAppLeakyType;
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struct _GstAppSrc
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{
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GstBaseSrc basesrc;
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/*< private >*/
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GstAppSrcPrivate *priv;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstAppSrcClass
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{
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GstBaseSrcClass basesrc_class;
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/* signals */
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void (*need_data) (GstAppSrc *appsrc, guint length);
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void (*enough_data) (GstAppSrc *appsrc);
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gboolean (*seek_data) (GstAppSrc *appsrc, guint64 offset);
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/* actions */
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GstFlowReturn (*push_buffer) (GstAppSrc *appsrc, GstBuffer *buffer);
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GstFlowReturn (*end_of_stream) (GstAppSrc *appsrc);
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GstFlowReturn (*push_sample) (GstAppSrc *appsrc, GstSample *sample);
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GstFlowReturn (*push_buffer_list) (GstAppSrc *appsrc, GstBufferList *buffer_list);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING-2];
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};
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GST_APP_API
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GType gst_app_src_get_type (void);
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GST_APP_API
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void gst_app_src_set_caps (GstAppSrc *appsrc, const GstCaps *caps);
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GST_APP_API
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GstCaps* gst_app_src_get_caps (GstAppSrc *appsrc);
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GST_APP_API
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void gst_app_src_set_size (GstAppSrc *appsrc, gint64 size);
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GST_APP_API
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gint64 gst_app_src_get_size (GstAppSrc *appsrc);
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GST_APP_API
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void gst_app_src_set_duration (GstAppSrc *appsrc, GstClockTime duration);
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GST_APP_API
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GstClockTime gst_app_src_get_duration (GstAppSrc *appsrc);
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GST_APP_API
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void gst_app_src_set_stream_type (GstAppSrc *appsrc, GstAppStreamType type);
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GST_APP_API
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GstAppStreamType gst_app_src_get_stream_type (GstAppSrc *appsrc);
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GST_APP_API
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void gst_app_src_set_max_bytes (GstAppSrc *appsrc, guint64 max);
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GST_APP_API
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guint64 gst_app_src_get_max_bytes (GstAppSrc *appsrc);
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GST_APP_API
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guint64 gst_app_src_get_current_level_bytes (GstAppSrc *appsrc);
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GST_APP_API
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void gst_app_src_set_max_buffers (GstAppSrc *appsrc, guint64 max);
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GST_APP_API
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guint64 gst_app_src_get_max_buffers (GstAppSrc *appsrc);
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GST_APP_API
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guint64 gst_app_src_get_current_level_buffers (GstAppSrc *appsrc);
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GST_APP_API
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void gst_app_src_set_max_time (GstAppSrc *appsrc, GstClockTime max);
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GST_APP_API
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GstClockTime gst_app_src_get_max_time (GstAppSrc *appsrc);
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GST_APP_API
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GstClockTime gst_app_src_get_current_level_time (GstAppSrc *appsrc);
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GST_APP_API
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void gst_app_src_set_leaky_type (GstAppSrc *appsrc, GstAppLeakyType leaky);
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GST_APP_API
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GstAppLeakyType gst_app_src_get_leaky_type (GstAppSrc *appsrc);
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GST_APP_API
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void gst_app_src_set_latency (GstAppSrc *appsrc, guint64 min, guint64 max);
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GST_APP_API
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void gst_app_src_get_latency (GstAppSrc *appsrc, guint64 *min, guint64 *max);
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GST_APP_API
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void gst_app_src_set_emit_signals (GstAppSrc *appsrc, gboolean emit);
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GST_APP_API
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gboolean gst_app_src_get_emit_signals (GstAppSrc *appsrc);
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GST_APP_API
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GstFlowReturn gst_app_src_push_buffer (GstAppSrc *appsrc, GstBuffer *buffer);
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GST_APP_API
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GstFlowReturn gst_app_src_push_buffer_list (GstAppSrc * appsrc, GstBufferList * buffer_list);
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GST_APP_API
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GstFlowReturn gst_app_src_end_of_stream (GstAppSrc *appsrc);
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GST_APP_API
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GstFlowReturn gst_app_src_push_sample (GstAppSrc *appsrc, GstSample *sample);
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GST_APP_API
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void gst_app_src_set_callbacks (GstAppSrc * appsrc,
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GstAppSrcCallbacks *callbacks,
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gpointer user_data,
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GDestroyNotify notify);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAppSrc, gst_object_unref)
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G_END_DECLS
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#endif
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