gstreamer/gst/rtpvp8/gstrtpvp8depay.c
Sebastian Dröge 860ccd414d Merge remote-tracking branch 'origin/0.10'
Conflicts:
	NEWS
	RELEASE
	common
	configure.ac
	docs/libs/gst-plugins-bad-libs-sections.txt
	docs/plugins/gst-plugins-bad-plugins.args
	docs/plugins/gst-plugins-bad-plugins.hierarchy
	docs/plugins/gst-plugins-bad-plugins.interfaces
	docs/plugins/inspect/plugin-adpcmdec.xml
	docs/plugins/inspect/plugin-adpcmenc.xml
	docs/plugins/inspect/plugin-assrender.xml
	docs/plugins/inspect/plugin-audiovisualizers.xml
	docs/plugins/inspect/plugin-autoconvert.xml
	docs/plugins/inspect/plugin-bayer.xml
	docs/plugins/inspect/plugin-bz2.xml
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	docs/plugins/inspect/plugin-dvbsuboverlay.xml
	docs/plugins/inspect/plugin-dvdspu.xml
	docs/plugins/inspect/plugin-faac.xml
	docs/plugins/inspect/plugin-faad.xml
	docs/plugins/inspect/plugin-gsm.xml
	docs/plugins/inspect/plugin-h264parse.xml
	docs/plugins/inspect/plugin-mms.xml
	docs/plugins/inspect/plugin-modplug.xml
	docs/plugins/inspect/plugin-mpeg2enc.xml
	docs/plugins/inspect/plugin-mpegdemux2.xml
	docs/plugins/inspect/plugin-mpegtsdemux.xml
	docs/plugins/inspect/plugin-mpegvideoparse.xml
	docs/plugins/inspect/plugin-mplex.xml
	docs/plugins/inspect/plugin-pcapparse.xml
	docs/plugins/inspect/plugin-rawparse.xml
	docs/plugins/inspect/plugin-rtpmux.xml
	docs/plugins/inspect/plugin-rtpvp8.xml
	docs/plugins/inspect/plugin-scaletempo.xml
	docs/plugins/inspect/plugin-schro.xml
	docs/plugins/inspect/plugin-sdp.xml
	docs/plugins/inspect/plugin-segmentclip.xml
	docs/plugins/inspect/plugin-shm.xml
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	docs/plugins/inspect/plugin-videoparsersbad.xml
	docs/plugins/inspect/plugin-vp8.xml
	docs/plugins/inspect/plugin-y4mdec.xml
	ext/celt/gstceltdec.c
	ext/dts/gstdtsdec.c
	ext/modplug/gstmodplug.cc
	ext/opus/gstopusenc.c
	gst-libs/gst/video/gstbasevideocodec.c
	gst-libs/gst/video/gstbasevideocodec.h
	gst-libs/gst/video/gstbasevideodecoder.c
	gst-libs/gst/video/gstbasevideodecoder.h
	gst-libs/gst/video/gstbasevideoencoder.c
	gst-libs/gst/video/gstbasevideoencoder.h
	gst/adpcmdec/Makefile.am
	gst/audiovisualizers/gstbaseaudiovisualizer.c
	gst/h264parse/gsth264parse.c
	gst/mpegdemux/mpegtsparse.c
	gst/mpegtsdemux/mpegtsbase.c
	gst/mpegtsdemux/mpegtspacketizer.c
	gst/mpegtsdemux/mpegtsparse.c
	gst/mpegtsdemux/tsdemux.c
	gst/mpegtsdemux/tsdemux.h
	gst/mxf/mxfdemux.c
	gst/rawparse/gstaudioparse.c
	gst/videoparsers/gsth263parse.c
	gst/videoparsers/gsth264parse.c
	sys/d3dvideosink/d3dvideosink.c
	sys/decklink/gstdecklinksink.cpp
	sys/dvb/gstdvbsrc.c
	sys/shm/gstshmsrc.c
	sys/vdpau/h264/gstvdph264dec.c
	sys/vdpau/mpeg/gstvdpmpegdec.c
	tests/examples/opencv/gst_element_print_properties.c
	win32/common/config.h
2012-03-29 17:41:53 +02:00

209 lines
6.1 KiB
C

/*
* gstrtpvp8depay.c - Source for GstRtpVP8Depay
* Copyright (C) 2011 Sjoerd Simons <sjoerd@luon.net>
* Copyright (C) 2011 Collabora Ltd.
* Contact: Youness Alaoui <youness.alaoui@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 "gstrtpvp8depay.h"
GST_DEBUG_CATEGORY_STATIC (gst_rtp_vp8_depay_debug);
#define GST_CAT_DEFAULT gst_rtp_vp8_depay_debug
G_DEFINE_TYPE (GstRtpVP8Depay, gst_rtp_vp8_depay, GST_TYPE_RTP_BASE_DEPAYLOAD);
static GstStaticPadTemplate gst_rtp_vp8_depay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-vp8"));
static GstStaticPadTemplate gst_rtp_vp8_depay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ","
"clock-rate = (int) 90000,"
"media = (string) \"video\","
"encoding-name = (string) \"VP8-DRAFT-IETF-01\""));
static void
gst_rtp_vp8_depay_init (GstRtpVP8Depay * self)
{
self->adapter = gst_adapter_new ();
self->started = FALSE;
}
static void gst_rtp_vp8_depay_dispose (GObject * object);
static GstBuffer *gst_rtp_vp8_depay_process (GstRTPBaseDepayload * depayload,
GstBuffer * buf);
static gboolean gst_rtp_vp8_depay_set_caps (GstRTPBaseDepayload * depayload,
GstCaps * caps);
static void
gst_rtp_vp8_depay_class_init (GstRtpVP8DepayClass * gst_rtp_vp8_depay_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (gst_rtp_vp8_depay_class);
GstElementClass *element_class = GST_ELEMENT_CLASS (gst_rtp_vp8_depay_class);
GstRTPBaseDepayloadClass *depay_class =
(GstRTPBaseDepayloadClass *) (gst_rtp_vp8_depay_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_vp8_depay_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_vp8_depay_src_template));
gst_element_class_set_metadata (element_class, "RTP VP8 depayloader",
"Codec/Depayloader/Network/RTP",
"Extracts VP8 video from RTP packets)",
"Sjoerd Simons <sjoerd@luon.net>");
object_class->dispose = gst_rtp_vp8_depay_dispose;
depay_class->process = gst_rtp_vp8_depay_process;
depay_class->set_caps = gst_rtp_vp8_depay_set_caps;
GST_DEBUG_CATEGORY_INIT (gst_rtp_vp8_depay_debug, "rtpvp8depay", 0,
"VP8 Video RTP Depayloader");
}
static void
gst_rtp_vp8_depay_dispose (GObject * object)
{
GstRtpVP8Depay *self = GST_RTP_VP8_DEPAY (object);
if (self->adapter != NULL)
g_object_unref (self->adapter);
self->adapter = NULL;
/* release any references held by the object here */
if (G_OBJECT_CLASS (gst_rtp_vp8_depay_parent_class)->dispose)
G_OBJECT_CLASS (gst_rtp_vp8_depay_parent_class)->dispose (object);
}
static GstBuffer *
gst_rtp_vp8_depay_process (GstRTPBaseDepayload * depay, GstBuffer * buf)
{
GstRtpVP8Depay *self = GST_RTP_VP8_DEPAY (depay);
GstBuffer *payload;
guint8 *data;
guint offset;
guint size;
GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
if (G_UNLIKELY (GST_BUFFER_IS_DISCONT (buf))) {
GST_LOG_OBJECT (self, "Discontinuity, flushing adapter");
gst_adapter_clear (self->adapter);
self->started = FALSE;
}
gst_rtp_buffer_map (buf, GST_MAP_READ, &rtpbuffer);
size = gst_rtp_buffer_get_payload_len (&rtpbuffer);
/* At least one header and one vp8 byte */
if (G_UNLIKELY (size < 2))
goto too_small;
data = gst_rtp_buffer_get_payload (&rtpbuffer);
if (G_UNLIKELY (!self->started)) {
/* Check if this is the start of a VP8 frame, otherwise bail */
/* S=1 and PartID= 0 */
if ((data[0] & 0x1F) != 0x10)
goto done;
self->started = TRUE;
}
offset = 1;
/* Check X optional header */
if ((data[0] & 0x80) != 0) {
offset++;
/* Check I optional header */
if ((data[1] & 0x80) != 0) {
offset++;
if (G_UNLIKELY (offset + 2 >= size))
goto too_small;
/* Check for 16 bits PictureID */
if ((data[2] & 0x80) != 0)
offset++;
}
/* Check L optional header */
if ((data[1] & 0x40) != 0)
offset++;
/* Check T or K optional headers */
if ((data[1] & 0x20) != 0 || (data[1] & 0x10) != 0)
offset++;
}
if (G_UNLIKELY (offset >= size))
goto too_small;
payload = gst_rtp_buffer_get_payload_subbuffer (&rtpbuffer, offset, -1);
gst_adapter_push (self->adapter, payload);
/* Marker indicates that it was the last rtp packet for this frame */
if (gst_rtp_buffer_get_marker (&rtpbuffer)) {
GstBuffer *out;
out = gst_adapter_take_buffer (self->adapter,
gst_adapter_available (self->adapter));
self->started = FALSE;
gst_rtp_buffer_unmap (&rtpbuffer);
return out;
}
done:
gst_rtp_buffer_unmap (&rtpbuffer);
return NULL;
too_small:
GST_LOG_OBJECT (self, "Invalid rtp packet (too small), ignoring");
gst_adapter_clear (self->adapter);
self->started = FALSE;
goto done;
}
static gboolean
gst_rtp_vp8_depay_set_caps (GstRTPBaseDepayload * depayload, GstCaps * caps)
{
GstCaps *srccaps = gst_caps_new_simple ("video/x-vp8",
"framerate", GST_TYPE_FRACTION, 0, 1,
NULL);
gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps);
gst_caps_unref (srccaps);
return TRUE;
}
gboolean
gst_rtp_vp8_depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpvp8depay",
GST_RANK_MARGINAL, GST_TYPE_RTP_VP8_DEPAY);
}