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a2b410a595
Original commit message from CVS: * configure.ac: * docs/plugins/Makefile.am: * docs/plugins/gst-plugins-bad-plugins-docs.sgml: * docs/plugins/gst-plugins-bad-plugins-sections.txt: * docs/plugins/inspect/plugin-app.xml: * examples/Makefile.am: * examples/app/.cvsignore: * examples/app/Makefile.am: * examples/app/appsink-src.c: * examples/app/appsrc-ra.c: * examples/app/appsrc-seekable.c: * examples/app/appsrc-stream.c: * examples/app/appsrc-stream2.c: * examples/app/appsrc_ex.c: * gst-libs/gst/Makefile.am: * gst-libs/gst/app/.cvsignore: * gst-libs/gst/app/Makefile.am: * gst-libs/gst/app/gstapp-marshal.list: * gst-libs/gst/app/gstappbuffer.c: * gst-libs/gst/app/gstappbuffer.h: * gst-libs/gst/app/gstappsink.c: * gst-libs/gst/app/gstappsink.h: * gst-libs/gst/app/gstappsrc.c: * gst-libs/gst/app/gstappsrc.h: * gst/app/Makefile.am: * gst/app/gstapp.c: Remove AppSrc/AppSink that are moving to -base. Partially fixes #564421
1166 lines
34 KiB
C
1166 lines
34 KiB
C
/* GStreamer
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* Copyright (C) 2007 David Schleef <ds@schleef.org>
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* (C) 2008 Wim Taymans <wim.taymans@gmail.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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-appsrc
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* @see_also: #GstBaseSrc, appsink
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*
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* The appsrc element can be used by applications to insert data into a
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* GStreamer pipeline.
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*
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* appsrc can be used by linking to the gstappsrc.h header file to access the
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* methods or by using the appsrc action signals.
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*
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* Before operating appsrc, the caps property must be set to a fixed caps
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* describing the format of the data that will be pushed with appsrc.
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*
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* The main way of handing data to the appsrc element is by calling the
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* gst_app_src_push_buffer() method or by emiting the push-buffer action signal.
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* This will put the buffer onto a queue from which appsrc will read from in its
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* streaming thread. It is important to note that data transport will not happen
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* from the thread that performed the push-buffer call.
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*
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* The "max-bytes" property controls how much data can be queued in appsrc
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* before appsrc considers the queue full. A filled internal queue will always
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* signal the "enough-data" signal, which signals the application that it should
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* stop pushing data into appsrc. The "block" property will cause appsrc to
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* block the push-buffer method until free data becomes available again.
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*
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* When the internal queue is running out of data, the "need-data" signal is
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* emited, which signals the application that it should start pushing more data
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* into appsrc.
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*
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* In addition to the "need-data" and "enough-data" signals, appsrc can emit the
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* "seek-data" signal when the "stream-mode" property is set to "seekable" or
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* "random-access". The signal argument will contain the new desired position in
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* the stream expressed in the unit set with the "format" property. After
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* receiving the seek-data signal, the application should push-buffers from the
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* new position.
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*
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* These signals allow the application to operate the appsrc in two different
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* ways:
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*
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* The push model, in which the application repeadedly calls the push-buffer method
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* with a new buffer. Optionally, the queue size in the appsrc can be controlled
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* with the enough-data and need-data signals by respectively stopping/starting
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* the push-buffer calls. This is a typical mode of operation for the
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* stream-type "stream" and "seekable". Use this model when implementing various
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* network protocols or hardware devices.
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*
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* The pull model where the need-data signal triggers the next push-buffer call.
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* This mode is typically used in the "random-access" stream-type. Use this
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* model for file access or other randomly accessable sources. In this mode, a
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* buffer of exactly the amount of bytes given by the need-data signal should be
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* pushed into appsrc.
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*
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* In all modes, the size property on appsrc should contain the total stream
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* size in bytes. Setting this property is mandatory in the random-access mode.
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* For the stream and seekable modes, setting this property is optional but
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* recommended.
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*
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* When the application is finished pushing data into appsrc, it should call
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* gst_app_src_end_of_stream() or emit the end-of-stream action signal. After
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* this call, no more buffers can be pushed into appsrc until a flushing seek
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* happened or the state of the appsrc has gone through READY.
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*
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* Last reviewed on 2008-12-17 (0.10.10)
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/base/gstbasesrc.h>
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#include <string.h>
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#include "gstapp-marshal.h"
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#include "gstappsrc.h"
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GST_DEBUG_CATEGORY (app_src_debug);
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#define GST_CAT_DEFAULT app_src_debug
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static const GstElementDetails app_src_details = GST_ELEMENT_DETAILS ("AppSrc",
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"Generic/Src",
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"Allow the application to feed buffers to a pipeline",
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"David Schleef <ds@schleef.org>, Wim Taymans <wim.taymans@gmail.com>");
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enum
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{
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/* signals */
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SIGNAL_NEED_DATA,
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SIGNAL_ENOUGH_DATA,
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SIGNAL_SEEK_DATA,
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/* actions */
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SIGNAL_PUSH_BUFFER,
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SIGNAL_END_OF_STREAM,
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LAST_SIGNAL
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};
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#define DEFAULT_PROP_SIZE -1
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#define DEFAULT_PROP_STREAM_TYPE GST_APP_STREAM_TYPE_STREAM
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#define DEFAULT_PROP_MAX_BYTES 200000
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#define DEFAULT_PROP_FORMAT GST_FORMAT_BYTES
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#define DEFAULT_PROP_BLOCK FALSE
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#define DEFAULT_PROP_IS_LIVE FALSE
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enum
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{
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PROP_0,
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PROP_CAPS,
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PROP_SIZE,
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PROP_STREAM_TYPE,
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PROP_MAX_BYTES,
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PROP_FORMAT,
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PROP_BLOCK,
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PROP_IS_LIVE,
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PROP_LAST
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};
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static GstStaticPadTemplate gst_app_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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#define GST_TYPE_APP_STREAM_TYPE (stream_type_get_type ())
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static GType
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stream_type_get_type (void)
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{
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static GType stream_type_type = 0;
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static const GEnumValue stream_type[] = {
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{GST_APP_STREAM_TYPE_STREAM, "Stream", "stream"},
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{GST_APP_STREAM_TYPE_SEEKABLE, "Seekable", "seekable"},
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{GST_APP_STREAM_TYPE_RANDOM_ACCESS, "Random Access", "random-access"},
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{0, NULL, NULL},
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};
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if (!stream_type_type) {
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stream_type_type = g_enum_register_static ("GstAppStreamType", stream_type);
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}
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return stream_type_type;
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}
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static void gst_app_src_uri_handler_init (gpointer g_iface,
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gpointer iface_data);
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static void gst_app_src_dispose (GObject * object);
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static void gst_app_src_finalize (GObject * object);
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static void gst_app_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_app_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_app_src_create (GstBaseSrc * bsrc,
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guint64 offset, guint size, GstBuffer ** buf);
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static gboolean gst_app_src_start (GstBaseSrc * bsrc);
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static gboolean gst_app_src_stop (GstBaseSrc * bsrc);
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static gboolean gst_app_src_unlock (GstBaseSrc * bsrc);
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static gboolean gst_app_src_unlock_stop (GstBaseSrc * bsrc);
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static gboolean gst_app_src_do_seek (GstBaseSrc * src, GstSegment * segment);
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static gboolean gst_app_src_is_seekable (GstBaseSrc * src);
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static gboolean gst_app_src_check_get_range (GstBaseSrc * src);
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static gboolean gst_app_src_do_get_size (GstBaseSrc * src, guint64 * size);
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static GstFlowReturn gst_app_src_push_buffer_action (GstAppSrc * appsrc,
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GstBuffer * buffer);
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static guint gst_app_src_signals[LAST_SIGNAL] = { 0 };
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static void
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_do_init (GType filesrc_type)
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{
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static const GInterfaceInfo urihandler_info = {
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gst_app_src_uri_handler_init,
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NULL,
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NULL
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};
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g_type_add_interface_static (filesrc_type, GST_TYPE_URI_HANDLER,
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&urihandler_info);
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}
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GST_BOILERPLATE_FULL (GstAppSrc, gst_app_src, GstBaseSrc, GST_TYPE_BASE_SRC,
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_do_init);
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static void
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gst_app_src_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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GST_DEBUG_CATEGORY_INIT (app_src_debug, "appsrc", 0, "appsrc element");
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gst_element_class_set_details (element_class, &app_src_details);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_app_src_template));
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}
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static void
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gst_app_src_class_init (GstAppSrcClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstBaseSrcClass *basesrc_class = (GstBaseSrcClass *) klass;
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gobject_class->dispose = gst_app_src_dispose;
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gobject_class->finalize = gst_app_src_finalize;
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gobject_class->set_property = gst_app_src_set_property;
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gobject_class->get_property = gst_app_src_get_property;
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/**
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* GstAppSrc::caps
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*
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* The GstCaps that will negotiated downstream and will be put
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* on outgoing buffers.
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*/
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g_object_class_install_property (gobject_class, PROP_CAPS,
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g_param_spec_boxed ("caps", "Caps",
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"The allowed caps for the src pad", GST_TYPE_CAPS,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::format
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*
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* The format to use for segment events. When the source is producing
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* timestamped buffers this property should be set to GST_FORMAT_TIME.
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*/
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g_object_class_install_property (gobject_class, PROP_FORMAT,
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g_param_spec_enum ("format", "Format",
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"The format of the segment events and seek", GST_TYPE_FORMAT,
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DEFAULT_PROP_FORMAT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::size
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*
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* The total size in bytes of the data stream. If the total size is known, it
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* is recommended to configure it with this property.
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*/
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g_object_class_install_property (gobject_class, PROP_SIZE,
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g_param_spec_int64 ("size", "Size",
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"The size of the data stream in bytes (-1 if unknown)",
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-1, G_MAXINT64, DEFAULT_PROP_SIZE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::stream-type
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*
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* The type of stream that this source is producing. For seekable streams the
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* application should connect to the seek-data signal.
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*/
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g_object_class_install_property (gobject_class, PROP_STREAM_TYPE,
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g_param_spec_enum ("stream-type", "Stream Type",
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"the type of the stream", GST_TYPE_APP_STREAM_TYPE,
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DEFAULT_PROP_STREAM_TYPE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::max-bytes
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*
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* The maximum amount of bytes that can be queued internally.
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* After the maximum amount of bytes are queued, appsrc will emit the
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* "enough-data" signal.
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*/
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g_object_class_install_property (gobject_class, PROP_MAX_BYTES,
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g_param_spec_uint64 ("max-bytes", "Max bytes",
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"The maximum number of bytes to queue internally (0 = unlimited)",
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0, G_MAXUINT64, DEFAULT_PROP_MAX_BYTES,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::block
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*
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* When max-bytes are queued and after the enough-data signal has been emited,
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* block any further push-buffer calls until the amount of queued bytes drops
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* below the max-bytes limit.
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*/
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g_object_class_install_property (gobject_class, PROP_BLOCK,
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g_param_spec_boolean ("block", "Block",
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"Block push-buffer when max-bytes are queued",
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DEFAULT_PROP_BLOCK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::is-live
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*
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* Instruct the source to behave like a live source. This includes that it
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* will only push out buffers in the PLAYING state.
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*/
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g_object_class_install_property (gobject_class, PROP_IS_LIVE,
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g_param_spec_boolean ("is-live", "Is Live",
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"Whether to act as a live source",
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DEFAULT_PROP_IS_LIVE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::need-data:
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* @appsrc: the appsrc element that emited the signal
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* @length: the amount of bytes needed.
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*
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* Signal that the source needs more data. In the callback or from another
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* thread you should call push-buffer or end-of-stream.
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*
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* @length is just a hint and when it is set to -1, any number of bytes can be
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* pushed into @appsrc.
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*
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* You can call push-buffer multiple times until the enough-data signal is
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* fired.
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*/
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gst_app_src_signals[SIGNAL_NEED_DATA] =
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g_signal_new ("need-data", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstAppSrcClass, need_data),
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NULL, NULL, gst_app_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
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/**
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* GstAppSrc::enough-data:
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* @appsrc: the appsrc element that emited the signal
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*
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* Signal that the source has enough data. It is recommended that the
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* application stops calling push-buffer until the need-data signal is
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* emited again to avoid excessive buffer queueing.
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*/
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gst_app_src_signals[SIGNAL_ENOUGH_DATA] =
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g_signal_new ("enough-data", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstAppSrcClass, enough_data),
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NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
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/**
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* GstAppSrc::seek-data:
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* @appsrc: the appsrc element that emited the signal
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* @offset: the offset to seek to
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*
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* Seek to the given offset. The next push-buffer should produce buffers from
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* the new @offset.
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* This callback is only called for seekable stream types.
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*
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* Returns: %TRUE if the seek succeeded.
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*/
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gst_app_src_signals[SIGNAL_SEEK_DATA] =
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g_signal_new ("seek-data", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstAppSrcClass, seek_data),
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NULL, NULL, gst_app_marshal_BOOLEAN__UINT64, G_TYPE_BOOLEAN, 1,
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G_TYPE_UINT64);
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/**
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* GstAppSrc::push-buffer:
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* @appsrc: the appsrc
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* @buffer: a buffer to push
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*
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* Adds a buffer to the queue of buffers that the appsrc element will
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* push to its source pad. This function does not take ownership of the
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* buffer so the buffer needs to be unreffed after calling this function.
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*
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* When the block property is TRUE, this function can block until free space
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* becomes available in the queue.
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*/
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gst_app_src_signals[SIGNAL_PUSH_BUFFER] =
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g_signal_new ("push-buffer", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstAppSrcClass,
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push_buffer), NULL, NULL, gst_app_marshal_ENUM__OBJECT,
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GST_TYPE_FLOW_RETURN, 1, GST_TYPE_BUFFER);
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/**
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* GstAppSrc::end-of-stream:
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* @appsrc: the appsrc
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*
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* Notify @appsrc that no more buffer are available.
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*/
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gst_app_src_signals[SIGNAL_END_OF_STREAM] =
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g_signal_new ("end-of-stream", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstAppSrcClass,
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end_of_stream), NULL, NULL, gst_app_marshal_ENUM__VOID,
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GST_TYPE_FLOW_RETURN, 0, G_TYPE_NONE);
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basesrc_class->create = gst_app_src_create;
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basesrc_class->start = gst_app_src_start;
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basesrc_class->stop = gst_app_src_stop;
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basesrc_class->unlock = gst_app_src_unlock;
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basesrc_class->unlock_stop = gst_app_src_unlock_stop;
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basesrc_class->do_seek = gst_app_src_do_seek;
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basesrc_class->is_seekable = gst_app_src_is_seekable;
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basesrc_class->check_get_range = gst_app_src_check_get_range;
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basesrc_class->get_size = gst_app_src_do_get_size;
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klass->push_buffer = gst_app_src_push_buffer_action;
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klass->end_of_stream = gst_app_src_end_of_stream;
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}
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static void
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gst_app_src_init (GstAppSrc * appsrc, GstAppSrcClass * klass)
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{
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appsrc->mutex = g_mutex_new ();
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appsrc->cond = g_cond_new ();
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appsrc->queue = g_queue_new ();
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appsrc->size = DEFAULT_PROP_SIZE;
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appsrc->stream_type = DEFAULT_PROP_STREAM_TYPE;
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appsrc->max_bytes = DEFAULT_PROP_MAX_BYTES;
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appsrc->format = DEFAULT_PROP_FORMAT;
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appsrc->block = DEFAULT_PROP_BLOCK;
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gst_base_src_set_live (GST_BASE_SRC (appsrc), DEFAULT_PROP_IS_LIVE);
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}
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static void
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gst_app_src_flush_queued (GstAppSrc * src)
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|
{
|
|
GstBuffer *buf;
|
|
|
|
while ((buf = g_queue_pop_head (src->queue)))
|
|
gst_buffer_unref (buf);
|
|
}
|
|
|
|
static void
|
|
gst_app_src_dispose (GObject * obj)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (obj);
|
|
|
|
if (appsrc->caps) {
|
|
gst_caps_unref (appsrc->caps);
|
|
appsrc->caps = NULL;
|
|
}
|
|
gst_app_src_flush_queued (appsrc);
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (obj);
|
|
}
|
|
|
|
static void
|
|
gst_app_src_finalize (GObject * obj)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (obj);
|
|
|
|
g_mutex_free (appsrc->mutex);
|
|
g_cond_free (appsrc->cond);
|
|
g_queue_free (appsrc->queue);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (obj);
|
|
}
|
|
|
|
static void
|
|
gst_app_src_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_CAPS:
|
|
gst_app_src_set_caps (appsrc, gst_value_get_caps (value));
|
|
break;
|
|
case PROP_SIZE:
|
|
gst_app_src_set_size (appsrc, g_value_get_int64 (value));
|
|
break;
|
|
case PROP_STREAM_TYPE:
|
|
gst_app_src_set_stream_type (appsrc, g_value_get_enum (value));
|
|
break;
|
|
case PROP_MAX_BYTES:
|
|
gst_app_src_set_max_bytes (appsrc, g_value_get_uint64 (value));
|
|
break;
|
|
case PROP_FORMAT:
|
|
appsrc->format = g_value_get_enum (value);
|
|
break;
|
|
case PROP_BLOCK:
|
|
appsrc->block = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_IS_LIVE:
|
|
gst_base_src_set_live (GST_BASE_SRC (appsrc),
|
|
g_value_get_boolean (value));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_app_src_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_CAPS:
|
|
{
|
|
GstCaps *caps;
|
|
|
|
/* we're missing a _take_caps() function to transfer ownership */
|
|
caps = gst_app_src_get_caps (appsrc);
|
|
gst_value_set_caps (value, caps);
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
break;
|
|
}
|
|
case PROP_SIZE:
|
|
g_value_set_int64 (value, gst_app_src_get_size (appsrc));
|
|
break;
|
|
case PROP_STREAM_TYPE:
|
|
g_value_set_enum (value, gst_app_src_get_stream_type (appsrc));
|
|
break;
|
|
case PROP_MAX_BYTES:
|
|
g_value_set_uint64 (value, gst_app_src_get_max_bytes (appsrc));
|
|
break;
|
|
case PROP_FORMAT:
|
|
g_value_set_enum (value, appsrc->format);
|
|
break;
|
|
case PROP_BLOCK:
|
|
g_value_set_boolean (value, appsrc->block);
|
|
break;
|
|
case PROP_IS_LIVE:
|
|
g_value_set_boolean (value, gst_base_src_is_live (GST_BASE_SRC (appsrc)));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_app_src_unlock (GstBaseSrc * bsrc)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (bsrc);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
GST_DEBUG_OBJECT (appsrc, "unlock start");
|
|
appsrc->flushing = TRUE;
|
|
g_cond_broadcast (appsrc->cond);
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_app_src_unlock_stop (GstBaseSrc * bsrc)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (bsrc);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
GST_DEBUG_OBJECT (appsrc, "unlock stop");
|
|
appsrc->flushing = FALSE;
|
|
g_cond_broadcast (appsrc->cond);
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_app_src_start (GstBaseSrc * bsrc)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (bsrc);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
GST_DEBUG_OBJECT (appsrc, "starting");
|
|
appsrc->started = TRUE;
|
|
/* set the offset to -1 so that we always do a first seek. This is only used
|
|
* in random-access mode. */
|
|
appsrc->offset = -1;
|
|
appsrc->flushing = FALSE;
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
gst_base_src_set_format (bsrc, appsrc->format);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_app_src_stop (GstBaseSrc * bsrc)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (bsrc);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
GST_DEBUG_OBJECT (appsrc, "stopping");
|
|
appsrc->is_eos = FALSE;
|
|
appsrc->flushing = TRUE;
|
|
appsrc->started = FALSE;
|
|
gst_app_src_flush_queued (appsrc);
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_app_src_is_seekable (GstBaseSrc * src)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (src);
|
|
gboolean res = FALSE;
|
|
|
|
switch (appsrc->stream_type) {
|
|
case GST_APP_STREAM_TYPE_STREAM:
|
|
break;
|
|
case GST_APP_STREAM_TYPE_SEEKABLE:
|
|
case GST_APP_STREAM_TYPE_RANDOM_ACCESS:
|
|
res = TRUE;
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_app_src_check_get_range (GstBaseSrc * src)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (src);
|
|
gboolean res = FALSE;
|
|
|
|
switch (appsrc->stream_type) {
|
|
case GST_APP_STREAM_TYPE_STREAM:
|
|
case GST_APP_STREAM_TYPE_SEEKABLE:
|
|
break;
|
|
case GST_APP_STREAM_TYPE_RANDOM_ACCESS:
|
|
res = TRUE;
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_app_src_do_get_size (GstBaseSrc * src, guint64 * size)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (src);
|
|
|
|
*size = gst_app_src_get_size (appsrc);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* will be called in push mode */
|
|
static gboolean
|
|
gst_app_src_do_seek (GstBaseSrc * src, GstSegment * segment)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (src);
|
|
gint64 desired_position;
|
|
gboolean res = FALSE;
|
|
|
|
desired_position = segment->last_stop;
|
|
|
|
GST_DEBUG_OBJECT (appsrc, "seeking to %" G_GINT64_FORMAT ", format %s",
|
|
desired_position, gst_format_get_name (segment->format));
|
|
|
|
/* no need to try to seek in streaming mode */
|
|
if (appsrc->stream_type == GST_APP_STREAM_TYPE_STREAM)
|
|
return TRUE;
|
|
|
|
g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_SEEK_DATA], 0,
|
|
desired_position, &res);
|
|
|
|
if (res) {
|
|
GST_DEBUG_OBJECT (appsrc, "flushing queue");
|
|
gst_app_src_flush_queued (appsrc);
|
|
} else {
|
|
GST_WARNING_OBJECT (appsrc, "seek failed");
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_app_src_create (GstBaseSrc * bsrc, guint64 offset, guint size,
|
|
GstBuffer ** buf)
|
|
{
|
|
GstAppSrc *appsrc = GST_APP_SRC (bsrc);
|
|
GstFlowReturn ret;
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
/* check flushing first */
|
|
if (G_UNLIKELY (appsrc->flushing))
|
|
goto flushing;
|
|
|
|
if (appsrc->stream_type == GST_APP_STREAM_TYPE_RANDOM_ACCESS) {
|
|
/* if we are dealing with a random-access stream, issue a seek if the offset
|
|
* changed. */
|
|
if (G_UNLIKELY (appsrc->offset != offset)) {
|
|
gboolean res;
|
|
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
GST_DEBUG_OBJECT (appsrc,
|
|
"we are at %" G_GINT64_FORMAT ", seek to %" G_GINT64_FORMAT,
|
|
appsrc->offset, offset);
|
|
|
|
g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_SEEK_DATA], 0,
|
|
offset, &res);
|
|
|
|
if (G_UNLIKELY (!res))
|
|
/* failing to seek is fatal */
|
|
goto seek_error;
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
|
|
appsrc->offset = offset;
|
|
}
|
|
}
|
|
|
|
while (TRUE) {
|
|
/* return data as long as we have some */
|
|
if (!g_queue_is_empty (appsrc->queue)) {
|
|
guint buf_size;
|
|
|
|
*buf = g_queue_pop_head (appsrc->queue);
|
|
buf_size = GST_BUFFER_SIZE (*buf);
|
|
|
|
GST_DEBUG_OBJECT (appsrc, "we have buffer %p of size %u", *buf, buf_size);
|
|
|
|
appsrc->queued_bytes -= buf_size;
|
|
|
|
/* only update the offset when in random_access mode */
|
|
if (appsrc->stream_type == GST_APP_STREAM_TYPE_RANDOM_ACCESS) {
|
|
appsrc->offset += buf_size;
|
|
}
|
|
|
|
gst_buffer_set_caps (*buf, appsrc->caps);
|
|
|
|
/* signal that we removed an item */
|
|
g_cond_broadcast (appsrc->cond);
|
|
|
|
ret = GST_FLOW_OK;
|
|
break;
|
|
} else {
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
/* we have no data, we need some. We fire the signal with the size hint. */
|
|
g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_NEED_DATA], 0, size,
|
|
NULL);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
/* we can be flushing now because we released the lock */
|
|
if (G_UNLIKELY (appsrc->flushing))
|
|
goto flushing;
|
|
|
|
/* if we have a buffer now, continue the loop and try to return it. In
|
|
* random-access mode (where a buffer is normally pushed in the above
|
|
* signal) we can still be empty because the pushed buffer got flushed or
|
|
* when the application pushes the requested buffer later, we support both
|
|
* possiblities. */
|
|
if (!g_queue_is_empty (appsrc->queue))
|
|
continue;
|
|
|
|
/* no buffer yet, maybe we are EOS, if not, block for more data. */
|
|
}
|
|
|
|
/* check EOS */
|
|
if (G_UNLIKELY (appsrc->is_eos))
|
|
goto eos;
|
|
|
|
/* nothing to return, wait a while for new data or flushing. */
|
|
g_cond_wait (appsrc->cond, appsrc->mutex);
|
|
}
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
flushing:
|
|
{
|
|
GST_DEBUG_OBJECT (appsrc, "we are flushing");
|
|
g_mutex_unlock (appsrc->mutex);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
eos:
|
|
{
|
|
GST_DEBUG_OBJECT (appsrc, "we are EOS");
|
|
g_mutex_unlock (appsrc->mutex);
|
|
return GST_FLOW_UNEXPECTED;
|
|
}
|
|
seek_error:
|
|
{
|
|
GST_ELEMENT_ERROR (appsrc, RESOURCE, READ, ("failed to seek"),
|
|
GST_ERROR_SYSTEM);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* external API */
|
|
|
|
/**
|
|
* gst_app_src_set_caps:
|
|
* @appsrc: a #GstAppSrc
|
|
* @caps: caps to set
|
|
*
|
|
* Set the capabilities on the appsrc element. This function takes
|
|
* a copy of the caps structure. After calling this method, the source will
|
|
* only produce caps that match @caps. @caps must be fixed and the caps on the
|
|
* buffers must match the caps or left NULL.
|
|
*/
|
|
void
|
|
gst_app_src_set_caps (GstAppSrc * appsrc, const GstCaps * caps)
|
|
{
|
|
GstCaps *old;
|
|
|
|
g_return_if_fail (GST_IS_APP_SRC (appsrc));
|
|
|
|
GST_OBJECT_LOCK (appsrc);
|
|
GST_DEBUG_OBJECT (appsrc, "setting caps to %" GST_PTR_FORMAT, caps);
|
|
if ((old = appsrc->caps) != caps) {
|
|
if (caps)
|
|
appsrc->caps = gst_caps_copy (caps);
|
|
else
|
|
appsrc->caps = NULL;
|
|
if (old)
|
|
gst_caps_unref (old);
|
|
}
|
|
GST_OBJECT_UNLOCK (appsrc);
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_get_caps:
|
|
* @appsrc: a #GstAppSrc
|
|
*
|
|
* Get the configured caps on @appsrc.
|
|
*
|
|
* Returns: the #GstCaps produced by the source. gst_caps_unref() after usage.
|
|
*/
|
|
GstCaps *
|
|
gst_app_src_get_caps (GstAppSrc * appsrc)
|
|
{
|
|
GstCaps *caps;
|
|
|
|
g_return_val_if_fail (appsrc != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_APP_SRC (appsrc), NULL);
|
|
|
|
GST_OBJECT_LOCK (appsrc);
|
|
if ((caps = appsrc->caps))
|
|
gst_caps_ref (caps);
|
|
GST_DEBUG_OBJECT (appsrc, "getting caps of %" GST_PTR_FORMAT, caps);
|
|
GST_OBJECT_UNLOCK (appsrc);
|
|
|
|
return caps;
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_set_size:
|
|
* @appsrc: a #GstAppSrc
|
|
* @size: the size to set
|
|
*
|
|
* Set the size of the stream in bytes. A value of -1 means that the size is
|
|
* not known.
|
|
*/
|
|
void
|
|
gst_app_src_set_size (GstAppSrc * appsrc, gint64 size)
|
|
{
|
|
g_return_if_fail (appsrc != NULL);
|
|
g_return_if_fail (GST_IS_APP_SRC (appsrc));
|
|
|
|
GST_OBJECT_LOCK (appsrc);
|
|
GST_DEBUG_OBJECT (appsrc, "setting size of %" G_GINT64_FORMAT, size);
|
|
appsrc->size = size;
|
|
GST_OBJECT_UNLOCK (appsrc);
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_get_size:
|
|
* @appsrc: a #GstAppSrc
|
|
*
|
|
* Get the size of the stream in bytes. A value of -1 means that the size is
|
|
* not known.
|
|
*
|
|
* Returns: the size of the stream previously set with gst_app_src_set_size();
|
|
*/
|
|
gint64
|
|
gst_app_src_get_size (GstAppSrc * appsrc)
|
|
{
|
|
gint64 size;
|
|
|
|
g_return_val_if_fail (appsrc != NULL, -1);
|
|
g_return_val_if_fail (GST_IS_APP_SRC (appsrc), -1);
|
|
|
|
GST_OBJECT_LOCK (appsrc);
|
|
size = appsrc->size;
|
|
GST_DEBUG_OBJECT (appsrc, "getting size of %" G_GINT64_FORMAT, size);
|
|
GST_OBJECT_UNLOCK (appsrc);
|
|
|
|
return size;
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_set_stream_type:
|
|
* @appsrc: a #GstAppSrc
|
|
* @type: the new state
|
|
*
|
|
* Set the stream type on @appsrc. For seekable streams, the "seek" signal must
|
|
* be connected to.
|
|
*
|
|
* A stream_type stream
|
|
*/
|
|
void
|
|
gst_app_src_set_stream_type (GstAppSrc * appsrc, GstAppStreamType type)
|
|
{
|
|
g_return_if_fail (appsrc != NULL);
|
|
g_return_if_fail (GST_IS_APP_SRC (appsrc));
|
|
|
|
GST_OBJECT_LOCK (appsrc);
|
|
GST_DEBUG_OBJECT (appsrc, "setting stream_type of %d", type);
|
|
appsrc->stream_type = type;
|
|
GST_OBJECT_UNLOCK (appsrc);
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_get_stream_type:
|
|
* @appsrc: a #GstAppSrc
|
|
*
|
|
* Get the stream type. Control the stream type of @appsrc
|
|
* with gst_app_src_set_stream_type().
|
|
*
|
|
* Returns: the stream type.
|
|
*/
|
|
GstAppStreamType
|
|
gst_app_src_get_stream_type (GstAppSrc * appsrc)
|
|
{
|
|
gboolean stream_type;
|
|
|
|
g_return_val_if_fail (appsrc != NULL, FALSE);
|
|
g_return_val_if_fail (GST_IS_APP_SRC (appsrc), FALSE);
|
|
|
|
GST_OBJECT_LOCK (appsrc);
|
|
stream_type = appsrc->stream_type;
|
|
GST_DEBUG_OBJECT (appsrc, "getting stream_type of %d", stream_type);
|
|
GST_OBJECT_UNLOCK (appsrc);
|
|
|
|
return stream_type;
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_set_max_bytes:
|
|
* @appsrc: a #GstAppSrc
|
|
* @max: the maximum number of bytes to queue
|
|
*
|
|
* Set the maximum amount of bytes that can be queued in @appsrc.
|
|
* After the maximum amount of bytes are queued, @appsrc will emit the
|
|
* "enough-data" signal.
|
|
*/
|
|
void
|
|
gst_app_src_set_max_bytes (GstAppSrc * appsrc, guint64 max)
|
|
{
|
|
g_return_if_fail (GST_IS_APP_SRC (appsrc));
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
if (max != appsrc->max_bytes) {
|
|
GST_DEBUG_OBJECT (appsrc, "setting max-bytes to %" G_GUINT64_FORMAT, max);
|
|
appsrc->max_bytes = max;
|
|
/* signal the change */
|
|
g_cond_broadcast (appsrc->cond);
|
|
}
|
|
g_mutex_unlock (appsrc->mutex);
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_get_max_bytes:
|
|
* @appsrc: a #GstAppSrc
|
|
*
|
|
* Get the maximum amount of bytes that can be queued in @appsrc.
|
|
*
|
|
* Returns: The maximum amount of bytes that can be queued.
|
|
*/
|
|
guint64
|
|
gst_app_src_get_max_bytes (GstAppSrc * appsrc)
|
|
{
|
|
guint64 result;
|
|
|
|
g_return_val_if_fail (GST_IS_APP_SRC (appsrc), 0);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
result = appsrc->max_bytes;
|
|
GST_DEBUG_OBJECT (appsrc, "getting max-bytes of %" G_GUINT64_FORMAT, result);
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
return result;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_app_src_push_buffer_full (GstAppSrc * appsrc, GstBuffer * buffer,
|
|
gboolean steal_ref)
|
|
{
|
|
gboolean first = TRUE;
|
|
|
|
g_return_val_if_fail (appsrc, GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_IS_APP_SRC (appsrc), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
|
|
while (TRUE) {
|
|
/* can't accept buffers when we are flushing or EOS */
|
|
if (appsrc->flushing)
|
|
goto flushing;
|
|
|
|
if (appsrc->is_eos)
|
|
goto eos;
|
|
|
|
if (appsrc->max_bytes && appsrc->queued_bytes >= appsrc->max_bytes) {
|
|
GST_DEBUG_OBJECT (appsrc, "queue filled (%" G_GUINT64_FORMAT " >= %"
|
|
G_GUINT64_FORMAT ")", appsrc->queued_bytes, appsrc->max_bytes);
|
|
|
|
if (first) {
|
|
/* only signal on the first push */
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_ENOUGH_DATA], 0,
|
|
NULL);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
/* continue to check for flushing/eos after releasing the lock */
|
|
first = FALSE;
|
|
continue;
|
|
}
|
|
if (appsrc->block) {
|
|
GST_DEBUG_OBJECT (appsrc, "waiting for free space");
|
|
/* we are filled, wait until a buffer gets popped or when we
|
|
* flush. */
|
|
g_cond_wait (appsrc->cond, appsrc->mutex);
|
|
} else {
|
|
/* no need to wait for free space, we just pump more data into the
|
|
* queue hoping that the caller reacts to the enough-data signal and
|
|
* stops pushing buffers. */
|
|
break;
|
|
}
|
|
} else
|
|
break;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (appsrc, "queueing buffer %p", buffer);
|
|
if (!steal_ref)
|
|
gst_buffer_ref (buffer);
|
|
g_queue_push_tail (appsrc->queue, buffer);
|
|
appsrc->queued_bytes += GST_BUFFER_SIZE (buffer);
|
|
g_cond_broadcast (appsrc->cond);
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
return GST_FLOW_OK;
|
|
|
|
/* ERRORS */
|
|
flushing:
|
|
{
|
|
GST_DEBUG_OBJECT (appsrc, "refuse buffer %p, we are flushing", buffer);
|
|
if (steal_ref)
|
|
gst_buffer_unref (buffer);
|
|
g_mutex_unlock (appsrc->mutex);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
eos:
|
|
{
|
|
GST_DEBUG_OBJECT (appsrc, "refuse buffer %p, we are EOS", buffer);
|
|
if (steal_ref)
|
|
gst_buffer_unref (buffer);
|
|
g_mutex_unlock (appsrc->mutex);
|
|
return GST_FLOW_UNEXPECTED;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_push_buffer:
|
|
* @appsrc: a #GstAppSrc
|
|
* @buffer: a #GstBuffer to push
|
|
*
|
|
* Adds a buffer to the queue of buffers that the appsrc element will
|
|
* push to its source pad. This function takes ownership of the buffer.
|
|
*
|
|
* Returns: #GST_FLOW_OK when the buffer was successfuly queued.
|
|
* #GST_FLOW_WRONG_STATE when @appsrc is not PAUSED or PLAYING.
|
|
* #GST_FLOW_UNEXPECTED when EOS occured.
|
|
*/
|
|
GstFlowReturn
|
|
gst_app_src_push_buffer (GstAppSrc * appsrc, GstBuffer * buffer)
|
|
{
|
|
return gst_app_src_push_buffer_full (appsrc, buffer, TRUE);
|
|
}
|
|
|
|
/* push a buffer without stealing the ref of the buffer. This is used for the
|
|
* action signal. */
|
|
static GstFlowReturn
|
|
gst_app_src_push_buffer_action (GstAppSrc * appsrc, GstBuffer * buffer)
|
|
{
|
|
return gst_app_src_push_buffer_full (appsrc, buffer, FALSE);
|
|
}
|
|
|
|
/**
|
|
* gst_app_src_end_of_stream:
|
|
* @appsrc: a #GstAppSrc
|
|
*
|
|
* Indicates to the appsrc element that the last buffer queued in the
|
|
* element is the last buffer of the stream.
|
|
*
|
|
* Returns: #GST_FLOW_OK when the EOS was successfuly queued.
|
|
* #GST_FLOW_WRONG_STATE when @appsrc is not PAUSED or PLAYING.
|
|
*/
|
|
GstFlowReturn
|
|
gst_app_src_end_of_stream (GstAppSrc * appsrc)
|
|
{
|
|
g_return_val_if_fail (appsrc, GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_IS_APP_SRC (appsrc), GST_FLOW_ERROR);
|
|
|
|
g_mutex_lock (appsrc->mutex);
|
|
/* can't accept buffers when we are flushing. We can accept them when we are
|
|
* EOS although it will not do anything. */
|
|
if (appsrc->flushing)
|
|
goto flushing;
|
|
|
|
GST_DEBUG_OBJECT (appsrc, "sending EOS");
|
|
appsrc->is_eos = TRUE;
|
|
g_cond_broadcast (appsrc->cond);
|
|
g_mutex_unlock (appsrc->mutex);
|
|
|
|
return GST_FLOW_OK;
|
|
|
|
/* ERRORS */
|
|
flushing:
|
|
{
|
|
GST_DEBUG_OBJECT (appsrc, "refuse EOS, we are flushing");
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
}
|
|
|
|
/*** GSTURIHANDLER INTERFACE *************************************************/
|
|
|
|
static GstURIType
|
|
gst_app_src_uri_get_type (void)
|
|
{
|
|
return GST_URI_SRC;
|
|
}
|
|
|
|
static gchar **
|
|
gst_app_src_uri_get_protocols (void)
|
|
{
|
|
static gchar *protocols[] = { "appsrc", NULL };
|
|
|
|
return protocols;
|
|
}
|
|
static const gchar *
|
|
gst_app_src_uri_get_uri (GstURIHandler * handler)
|
|
{
|
|
return "appsrc";
|
|
}
|
|
|
|
static gboolean
|
|
gst_app_src_uri_set_uri (GstURIHandler * handler, const gchar * uri)
|
|
{
|
|
gchar *protocol;
|
|
gboolean ret;
|
|
|
|
protocol = gst_uri_get_protocol (uri);
|
|
ret = !strcmp (protocol, "appsrc");
|
|
g_free (protocol);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_app_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
|
|
{
|
|
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
|
|
|
|
iface->get_type = gst_app_src_uri_get_type;
|
|
iface->get_protocols = gst_app_src_uri_get_protocols;
|
|
iface->get_uri = gst_app_src_uri_get_uri;
|
|
iface->set_uri = gst_app_src_uri_set_uri;
|
|
}
|