gstreamer/gst/rtp/gstrtpmp4vdepay.c
Tim-Philipp Müller 4a28e649c3 rtp: cache meta tag quarks and add more utility functions for metas
Every g_quark_from_static_string() is a hash table lookup serialised
on the global quark lock in GLib. Let's just look up the two quarks
we need once and cache them locally for future use. While we're at it,
add new utility functions for the two most commonly used tags
(audio + video). Make first argument a gpointer so we don't have to
cast and make the code ugly. These are used for logging purposes
only anyway.
2017-05-24 13:32:10 +01:00

227 lines
6.5 KiB
C

/* GStreamer
* Copyright (C) <2005> Wim Taymans <wim.taymans@gmail.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gst/rtp/gstrtpbuffer.h>
#include <gst/video/video.h>
#include <string.h>
#include "gstrtpmp4vdepay.h"
#include "gstrtputils.h"
GST_DEBUG_CATEGORY_STATIC (rtpmp4vdepay_debug);
#define GST_CAT_DEFAULT (rtpmp4vdepay_debug)
static GstStaticPadTemplate gst_rtp_mp4v_depay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg,"
"mpegversion=(int) 4," "systemstream=(boolean)false")
);
static GstStaticPadTemplate gst_rtp_mp4v_depay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) \"video\", "
"clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP4V-ES\""
/* All optional parameters
*
* "profile-level-id=[1,MAX]"
* "config="
*/
)
);
#define gst_rtp_mp4v_depay_parent_class parent_class
G_DEFINE_TYPE (GstRtpMP4VDepay, gst_rtp_mp4v_depay,
GST_TYPE_RTP_BASE_DEPAYLOAD);
static void gst_rtp_mp4v_depay_finalize (GObject * object);
static gboolean gst_rtp_mp4v_depay_setcaps (GstRTPBaseDepayload * depayload,
GstCaps * caps);
static GstBuffer *gst_rtp_mp4v_depay_process (GstRTPBaseDepayload * depayload,
GstRTPBuffer * rtp);
static GstStateChangeReturn gst_rtp_mp4v_depay_change_state (GstElement *
element, GstStateChange transition);
static void
gst_rtp_mp4v_depay_class_init (GstRtpMP4VDepayClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
gobject_class->finalize = gst_rtp_mp4v_depay_finalize;
gstelement_class->change_state = gst_rtp_mp4v_depay_change_state;
gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_mp4v_depay_process;
gstrtpbasedepayload_class->set_caps = gst_rtp_mp4v_depay_setcaps;
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rtp_mp4v_depay_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rtp_mp4v_depay_sink_template);
gst_element_class_set_static_metadata (gstelement_class,
"RTP MPEG4 video depayloader", "Codec/Depayloader/Network/RTP",
"Extracts MPEG4 video from RTP packets (RFC 3016)",
"Wim Taymans <wim.taymans@gmail.com>");
GST_DEBUG_CATEGORY_INIT (rtpmp4vdepay_debug, "rtpmp4vdepay", 0,
"MPEG4 video RTP Depayloader");
}
static void
gst_rtp_mp4v_depay_init (GstRtpMP4VDepay * rtpmp4vdepay)
{
rtpmp4vdepay->adapter = gst_adapter_new ();
}
static void
gst_rtp_mp4v_depay_finalize (GObject * object)
{
GstRtpMP4VDepay *rtpmp4vdepay;
rtpmp4vdepay = GST_RTP_MP4V_DEPAY (object);
g_object_unref (rtpmp4vdepay->adapter);
rtpmp4vdepay->adapter = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_rtp_mp4v_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
{
GstStructure *structure;
GstCaps *srccaps;
const gchar *str;
gint clock_rate;
gboolean res;
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
clock_rate = 90000; /* default */
depayload->clock_rate = clock_rate;
srccaps = gst_caps_new_simple ("video/mpeg",
"mpegversion", G_TYPE_INT, 4,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
if ((str = gst_structure_get_string (structure, "config"))) {
GValue v = { 0 };
g_value_init (&v, GST_TYPE_BUFFER);
if (gst_value_deserialize (&v, str)) {
GstBuffer *buffer;
buffer = gst_value_get_buffer (&v);
gst_caps_set_simple (srccaps,
"codec_data", GST_TYPE_BUFFER, buffer, NULL);
/* caps takes ref */
g_value_unset (&v);
} else {
g_warning ("cannot convert config to buffer");
}
}
res = gst_pad_set_caps (depayload->srcpad, srccaps);
gst_caps_unref (srccaps);
return res;
}
static GstBuffer *
gst_rtp_mp4v_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)
{
GstRtpMP4VDepay *rtpmp4vdepay;
GstBuffer *pbuf, *outbuf = NULL;
gboolean marker;
rtpmp4vdepay = GST_RTP_MP4V_DEPAY (depayload);
/* flush remaining data on discont */
if (GST_BUFFER_IS_DISCONT (rtp->buffer))
gst_adapter_clear (rtpmp4vdepay->adapter);
pbuf = gst_rtp_buffer_get_payload_buffer (rtp);
marker = gst_rtp_buffer_get_marker (rtp);
gst_adapter_push (rtpmp4vdepay->adapter, pbuf);
/* if this was the last packet of the VOP, create and push a buffer */
if (marker) {
guint avail;
avail = gst_adapter_available (rtpmp4vdepay->adapter);
outbuf = gst_adapter_take_buffer (rtpmp4vdepay->adapter, avail);
GST_DEBUG ("gst_rtp_mp4v_depay_chain: pushing buffer of size %"
G_GSIZE_FORMAT, gst_buffer_get_size (outbuf));
gst_rtp_drop_non_video_meta (rtpmp4vdepay, outbuf);
}
return outbuf;
}
static GstStateChangeReturn
gst_rtp_mp4v_depay_change_state (GstElement * element,
GstStateChange transition)
{
GstRtpMP4VDepay *rtpmp4vdepay;
GstStateChangeReturn ret;
rtpmp4vdepay = GST_RTP_MP4V_DEPAY (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_adapter_clear (rtpmp4vdepay->adapter);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
default:
break;
}
return ret;
}
gboolean
gst_rtp_mp4v_depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpmp4vdepay",
GST_RANK_SECONDARY, GST_TYPE_RTP_MP4V_DEPAY);
}