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authorJulien Moutte <julien@moutte.net>2007-10-26 16:08:04 +0000
committerJulien Moutte <julien@moutte.net>2007-10-26 16:08:04 +0000
commit843665f109ee76b07564af09252e658198fb3b17 (patch)
treea251ed2d87f4730063037064c3e527ad3cd92b8b
parent5fb8c95eb19a922e76c8210b48af7a145baef704 (diff)
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Add a simple MPEG4 ES parser.
Original commit message from CVS: 2007-10-26 Julien MOUTTE <julien@moutte.net> * configure.ac: * gst/mpeg4videoparse/Makefile.am: * gst/mpeg4videoparse/mpeg4videoparse.c: (gst_mpeg4vparse_drain), (gst_mpeg4vparse_chain), (gst_mpeg4vparse_sink_setcaps), (gst_mpeg4vparse_sink_event), (gst_mpeg4vparse_cleanup), (gst_mpeg4vparse_change_state), (gst_mpeg4vparse_dispose), (gst_mpeg4vparse_base_init), (gst_mpeg4vparse_class_init), (gst_mpeg4vparse_init), (plugin_init): * gst/mpeg4videoparse/mpeg4videoparse.h: Add a simple MPEG4 ES parser.
-rw-r--r--ChangeLog13
-rw-r--r--configure.ac2
-rw-r--r--gst/mpeg4videoparse/Makefile.am9
-rw-r--r--gst/mpeg4videoparse/mpeg4videoparse.c281
-rw-r--r--gst/mpeg4videoparse/mpeg4videoparse.h62
5 files changed, 367 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index ebd780fc..8fb868dd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2007-10-26 Julien MOUTTE <julien@moutte.net>
+
+ * configure.ac:
+ * gst/mpeg4videoparse/Makefile.am:
+ * gst/mpeg4videoparse/mpeg4videoparse.c: (gst_mpeg4vparse_drain),
+ (gst_mpeg4vparse_chain), (gst_mpeg4vparse_sink_setcaps),
+ (gst_mpeg4vparse_sink_event), (gst_mpeg4vparse_cleanup),
+ (gst_mpeg4vparse_change_state), (gst_mpeg4vparse_dispose),
+ (gst_mpeg4vparse_base_init), (gst_mpeg4vparse_class_init),
+ (gst_mpeg4vparse_init), (plugin_init):
+ * gst/mpeg4videoparse/mpeg4videoparse.h: Add a simple MPEG4 ES
+ parser.
+
2007-10-25 David Schleef <ds@schleef.org>
* gst/multifile/Makefile.am:
diff --git a/configure.ac b/configure.ac
index 2037c12c..41a8f38f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -94,6 +94,7 @@ GST_PLUGINS_ALL="\
librfb \
modplug \
mpegtsparse \
+ mpeg4videoparse \
mpegvideoparse \
multifile \
mve \
@@ -1001,6 +1002,7 @@ gst/librfb/Makefile
gst/modplug/Makefile
gst/modplug/libmodplug/Makefile
gst/mpegtsparse/Makefile
+gst/mpeg4videoparse/Makefile
gst/mpegvideoparse/Makefile
gst/multifile/Makefile
gst/mve/Makefile
diff --git a/gst/mpeg4videoparse/Makefile.am b/gst/mpeg4videoparse/Makefile.am
new file mode 100644
index 00000000..793b013f
--- /dev/null
+++ b/gst/mpeg4videoparse/Makefile.am
@@ -0,0 +1,9 @@
+
+plugin_LTLIBRARIES = libgstmpeg4videoparse.la
+
+libgstmpeg4videoparse_la_SOURCES = mpeg4videoparse.c
+libgstmpeg4videoparse_la_CFLAGS = $(GST_CFLAGS)
+libgstmpeg4videoparse_la_LIBADD = $(GST_BASE_LIBS) $(GST_LIBS)
+libgstmpeg4videoparse_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = mpeg4videoparse.h
diff --git a/gst/mpeg4videoparse/mpeg4videoparse.c b/gst/mpeg4videoparse/mpeg4videoparse.c
new file mode 100644
index 00000000..21be173c
--- /dev/null
+++ b/gst/mpeg4videoparse/mpeg4videoparse.c
@@ -0,0 +1,281 @@
+/* GStreamer
+ * Copyright (C) <2007> Julien Moutte <julien@fluendo.com>
+ *
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "mpeg4videoparse.h"
+
+GST_DEBUG_CATEGORY_STATIC (mpeg4v_parse_debug);
+#define GST_CAT_DEFAULT mpeg4v_parse_debug
+
+/* elementfactory information */
+static GstElementDetails mpeg4vparse_details =
+GST_ELEMENT_DETAILS ("MPEG 4 video elementary stream parser",
+ "Codec/Parser/Video",
+ "Parses MPEG-4 Part 2 elementary video streams",
+ "Julien Moutte <julien@fluendo.com>");
+
+static GstStaticPadTemplate src_template =
+GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/mpeg, "
+ "mpegversion = (int) 4, "
+ "parsed = (boolean) true, " "systemstream = (boolean) false")
+ );
+
+static GstStaticPadTemplate sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/mpeg, "
+ "mpegversion = (int) 4, "
+ "parsed = (boolean) false, " "systemstream = (boolean) false")
+ );
+
+GST_BOILERPLATE (GstMpeg4VParse, gst_mpeg4vparse, GstElement, GST_TYPE_ELEMENT);
+
+static GstFlowReturn
+gst_mpeg4vparse_drain (GstMpeg4VParse * parse)
+{
+ GstFlowReturn ret = GST_FLOW_OK;
+ const guint8 *data = NULL;
+ guint i = 0, available = 0;
+
+ while (gst_adapter_available (parse->adapter) >= 4) {
+ /* If we have enough data, ensure we're aligned to a start code */
+ data = gst_adapter_peek (parse->adapter, 4);
+ if (data[0] == 0 && data[1] == 0 && data[2] == 1) {
+ GST_LOG_OBJECT (parse, "found start code with type %02X", data[3]);
+ parse->found_start = TRUE;
+ break;
+ } else {
+ GST_LOG_OBJECT (parse, "flushing 1 byte");
+ gst_adapter_flush (parse->adapter, 1);
+ }
+ }
+
+ if (G_UNLIKELY (!parse->found_start)) {
+ GST_DEBUG_OBJECT (parse, "start code not found, need more data");
+ goto beach;
+ }
+
+ if (G_UNLIKELY (gst_adapter_available (parse->adapter) < 8)) {
+ GST_DEBUG_OBJECT (parse, "start code found, need more data to find next");
+ goto beach;
+ }
+
+ /* Found a start code, search for the next one */
+ available = gst_adapter_available (parse->adapter);
+ data = gst_adapter_peek (parse->adapter, available);
+ for (i = 4; i < available - 4; i++) {
+ /* We generate packets based on VOP start code */
+ if (data[i] == 0 && data[i + 1] == 0 && data[i + 2] == 1 &&
+ data[i + 3] == 0xB6) {
+ GstBuffer *out_buf = gst_adapter_take_buffer (parse->adapter, i);
+
+ GST_LOG_OBJECT (parse, "found next start code at %u", i);
+ if (out_buf) {
+ gst_buffer_set_caps (out_buf, GST_PAD_CAPS (parse->srcpad));
+ gst_pad_push (parse->srcpad, out_buf);
+ }
+ parse->found_start = FALSE;
+ }
+ }
+
+beach:
+ return ret;
+}
+
+static GstFlowReturn
+gst_mpeg4vparse_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstMpeg4VParse *parse = GST_MPEG4VIDEOPARSE (gst_pad_get_parent (pad));
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ GST_DEBUG_OBJECT (parse, "received buffer of %u bytes with ts %"
+ GST_TIME_FORMAT " and offset %" G_GINT64_FORMAT, GST_BUFFER_SIZE (buffer),
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
+ GST_BUFFER_OFFSET (buffer));
+
+ gst_adapter_push (parse->adapter, buffer);
+
+ ret = gst_mpeg4vparse_drain (parse);
+
+ gst_object_unref (parse);
+
+ return ret;
+}
+
+static gboolean
+gst_mpeg4vparse_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+ gboolean res = TRUE;
+ GstCaps *out_caps = NULL;
+ GstMpeg4VParse *parse = GST_MPEG4VIDEOPARSE (gst_pad_get_parent (pad));
+
+ GST_DEBUG_OBJECT (parse, "setcaps called with %" GST_PTR_FORMAT, caps);
+
+ out_caps = gst_caps_new_simple ("video/mpeg",
+ "mpegversion", G_TYPE_INT, 4,
+ "systemstream", G_TYPE_BOOLEAN, FALSE,
+ "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
+
+ if (out_caps) {
+ GST_DEBUG_OBJECT (parse, "setting downstream caps to %" GST_PTR_FORMAT,
+ caps);
+ res = gst_pad_set_caps (parse->srcpad, out_caps);
+ gst_caps_unref (out_caps);
+ }
+
+ gst_object_unref (parse);
+
+ return res;
+}
+
+static gboolean
+gst_mpeg4vparse_sink_event (GstPad * pad, GstEvent * event)
+{
+ gboolean res = TRUE;
+ GstMpeg4VParse *parse = GST_MPEG4VIDEOPARSE (gst_pad_get_parent (pad));
+
+ GST_DEBUG_OBJECT (parse, "handling event type %s",
+ GST_EVENT_TYPE_NAME (event));
+
+ switch (GST_EVENT_TYPE (event)) {
+ default:
+ res = gst_pad_event_default (pad, event);
+ break;
+ }
+
+ gst_object_unref (parse);
+
+ return res;
+}
+
+static void
+gst_mpeg4vparse_cleanup (GstMpeg4VParse * parse)
+{
+ if (parse->adapter) {
+ gst_adapter_clear (parse->adapter);
+ }
+
+ parse->found_start = FALSE;
+}
+
+static GstStateChangeReturn
+gst_mpeg4vparse_change_state (GstElement * element, GstStateChange transition)
+{
+ GstMpeg4VParse *parse = GST_MPEG4VIDEOPARSE (element);
+ GstStateChangeReturn ret;
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ gst_mpeg4vparse_cleanup (parse);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void
+gst_mpeg4vparse_dispose (GObject * object)
+{
+ GstMpeg4VParse *parse = GST_MPEG4VIDEOPARSE (object);
+
+ if (parse->adapter) {
+ g_object_unref (parse->adapter);
+ parse->adapter = NULL;
+ }
+
+ GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
+}
+
+static void
+gst_mpeg4vparse_base_init (gpointer klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_template));
+
+ gst_element_class_set_details (element_class, &mpeg4vparse_details);
+}
+
+static void
+gst_mpeg4vparse_class_init (GstMpeg4VParseClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gstelement_class = (GstElementClass *) klass;
+ gobject_class = G_OBJECT_CLASS (klass);
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_dispose);
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_mpeg4vparse_change_state);
+}
+
+static void
+gst_mpeg4vparse_init (GstMpeg4VParse * parse, GstMpeg4VParseClass * g_class)
+{
+ parse->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
+ gst_pad_set_chain_function (parse->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_mpeg4vparse_chain));
+ gst_pad_set_event_function (parse->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_mpeg4vparse_sink_event));
+ gst_pad_set_setcaps_function (parse->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_mpeg4vparse_sink_setcaps));
+ gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
+
+ parse->srcpad = gst_pad_new_from_static_template (&src_template, "src");
+ gst_pad_use_fixed_caps (parse->srcpad);
+ gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
+
+ parse->adapter = gst_adapter_new ();
+
+ gst_mpeg4vparse_cleanup (parse);
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (mpeg4v_parse_debug, "mpeg4videoparse", 0,
+ "MPEG-4 video parser");
+
+ if (!gst_element_register (plugin, "mpeg4videoparse", GST_RANK_SECONDARY,
+ gst_mpeg4vparse_get_type ()))
+ return FALSE;
+
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "mpeg4videoparse",
+ "MPEG-4 video parser",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
diff --git a/gst/mpeg4videoparse/mpeg4videoparse.h b/gst/mpeg4videoparse/mpeg4videoparse.h
new file mode 100644
index 00000000..0fb434c3
--- /dev/null
+++ b/gst/mpeg4videoparse/mpeg4videoparse.h
@@ -0,0 +1,62 @@
+/* GStreamer
+ * Copyright (C) <2007> Julien Moutte <julien@fluendo.com>
+ *
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __MPEG4VIDEOPARSE_H__
+#define __MPEG4VIDEOPARSE_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstadapter.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_MPEG4VIDEOPARSE (gst_mpeg4vparse_get_type())
+#define GST_MPEG4VIDEOPARSE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),\
+ GST_TYPE_MPEG4VIDEOPARSE, GstMpeg4VParse))
+#define GST_MPEG4VIDEOPARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),\
+ GST_TYPE_MPEG4VIDEOPARSE, GstMpeg4VParseClass))
+#define GST_MPEG4VIDEOPARSE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),\
+ GST_TYPE_MPEG4VIDEOPARSE, GstMpeg4VParseClass))
+#define GST_IS_MPEG4VIDEOPARSE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),\
+ GST_TYPE_MPEG4VIDEOPARSE))
+#define GST_IS_MPEG4VIDEOPARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),\
+ GST_TYPE_MPEG4VIDEOPARSE))
+
+typedef struct _GstMpeg4VParse GstMpeg4VParse;
+typedef struct _GstMpeg4VParseClass GstMpeg4VParseClass;
+
+struct _GstMpeg4VParse {
+ GstElement element;
+
+ GstPad * sinkpad;
+ GstPad * srcpad;
+
+ GstAdapter * adapter;
+
+ gboolean found_start;
+};
+
+struct _GstMpeg4VParseClass {
+ GstElementClass parent_class;
+};
+
+GType gst_mpeg4vparse_get_type (void);
+
+G_END_DECLS
+
+#endif /* __MPEG4VIDEOPARSE_H__ */