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Remove the pt restrictions for all the depayloaders that have an encoding-name. We can use this to autoplug decoders. Remove the encoding-name for all the payloaders with a fixed payload type. We now either have an encoding-name or a pt in the sinkpad caps of a depayloader. See https://bugzilla.gnome.org/show_bug.cgi?id=639292
206 lines
6.1 KiB
C
206 lines
6.1 KiB
C
/* gstrtpvp8depay.c - Source for GstRtpVP8Depay
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* Copyright (C) 2011 Sjoerd Simons <sjoerd@luon.net>
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* Copyright (C) 2011 Collabora Ltd.
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* Contact: Youness Alaoui <youness.alaoui@collabora.co.uk>
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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 "gstrtpvp8depay.h"
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GST_DEBUG_CATEGORY_STATIC (gst_rtp_vp8_depay_debug);
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#define GST_CAT_DEFAULT gst_rtp_vp8_depay_debug
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static void gst_rtp_vp8_depay_dispose (GObject * object);
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static GstBuffer *gst_rtp_vp8_depay_process (GstRTPBaseDepayload * depayload,
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GstBuffer * buf);
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static gboolean gst_rtp_vp8_depay_set_caps (GstRTPBaseDepayload * depayload,
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GstCaps * caps);
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G_DEFINE_TYPE (GstRtpVP8Depay, gst_rtp_vp8_depay, GST_TYPE_RTP_BASE_DEPAYLOAD);
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static GstStaticPadTemplate gst_rtp_vp8_depay_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 ("video/x-vp8"));
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static GstStaticPadTemplate gst_rtp_vp8_depay_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/x-rtp, "
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"clock-rate = (int) 90000,"
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"media = (string) \"video\","
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"encoding-name = (string) \"VP8-DRAFT-IETF-01\""));
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static void
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gst_rtp_vp8_depay_init (GstRtpVP8Depay * self)
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{
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self->adapter = gst_adapter_new ();
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self->started = FALSE;
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}
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static void
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gst_rtp_vp8_depay_class_init (GstRtpVP8DepayClass * gst_rtp_vp8_depay_class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (gst_rtp_vp8_depay_class);
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GstElementClass *element_class = GST_ELEMENT_CLASS (gst_rtp_vp8_depay_class);
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GstRTPBaseDepayloadClass *depay_class =
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(GstRTPBaseDepayloadClass *) (gst_rtp_vp8_depay_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_vp8_depay_sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_vp8_depay_src_template));
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gst_element_class_set_static_metadata (element_class, "RTP VP8 depayloader",
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"Codec/Depayloader/Network/RTP",
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"Extracts VP8 video from RTP packets)",
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"Sjoerd Simons <sjoerd@luon.net>");
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object_class->dispose = gst_rtp_vp8_depay_dispose;
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depay_class->process = gst_rtp_vp8_depay_process;
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depay_class->set_caps = gst_rtp_vp8_depay_set_caps;
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GST_DEBUG_CATEGORY_INIT (gst_rtp_vp8_depay_debug, "rtpvp8depay", 0,
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"VP8 Video RTP Depayloader");
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}
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static void
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gst_rtp_vp8_depay_dispose (GObject * object)
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{
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GstRtpVP8Depay *self = GST_RTP_VP8_DEPAY (object);
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if (self->adapter != NULL)
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g_object_unref (self->adapter);
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self->adapter = NULL;
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/* release any references held by the object here */
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if (G_OBJECT_CLASS (gst_rtp_vp8_depay_parent_class)->dispose)
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G_OBJECT_CLASS (gst_rtp_vp8_depay_parent_class)->dispose (object);
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}
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static GstBuffer *
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gst_rtp_vp8_depay_process (GstRTPBaseDepayload * depay, GstBuffer * buf)
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{
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GstRtpVP8Depay *self = GST_RTP_VP8_DEPAY (depay);
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GstBuffer *payload;
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guint8 *data;
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guint offset;
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guint size;
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GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
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if (G_UNLIKELY (GST_BUFFER_IS_DISCONT (buf))) {
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GST_LOG_OBJECT (self, "Discontinuity, flushing adapter");
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gst_adapter_clear (self->adapter);
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self->started = FALSE;
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}
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gst_rtp_buffer_map (buf, GST_MAP_READ, &rtpbuffer);
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size = gst_rtp_buffer_get_payload_len (&rtpbuffer);
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/* At least one header and one vp8 byte */
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if (G_UNLIKELY (size < 2))
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goto too_small;
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data = gst_rtp_buffer_get_payload (&rtpbuffer);
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if (G_UNLIKELY (!self->started)) {
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/* Check if this is the start of a VP8 frame, otherwise bail */
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/* S=1 and PartID= 0 */
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if ((data[0] & 0x1F) != 0x10)
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goto done;
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self->started = TRUE;
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}
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offset = 1;
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/* Check X optional header */
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if ((data[0] & 0x80) != 0) {
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offset++;
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/* Check I optional header */
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if ((data[1] & 0x80) != 0) {
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offset++;
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if (G_UNLIKELY (offset + 2 >= size))
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goto too_small;
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/* Check for 16 bits PictureID */
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if ((data[2] & 0x80) != 0)
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offset++;
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}
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/* Check L optional header */
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if ((data[1] & 0x40) != 0)
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offset++;
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/* Check T or K optional headers */
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if ((data[1] & 0x20) != 0 || (data[1] & 0x10) != 0)
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offset++;
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}
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if (G_UNLIKELY (offset >= size))
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goto too_small;
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payload = gst_rtp_buffer_get_payload_subbuffer (&rtpbuffer, offset, -1);
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gst_adapter_push (self->adapter, payload);
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/* Marker indicates that it was the last rtp packet for this frame */
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if (gst_rtp_buffer_get_marker (&rtpbuffer)) {
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GstBuffer *out;
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out = gst_adapter_take_buffer (self->adapter,
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gst_adapter_available (self->adapter));
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self->started = FALSE;
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gst_rtp_buffer_unmap (&rtpbuffer);
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return out;
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}
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done:
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gst_rtp_buffer_unmap (&rtpbuffer);
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return NULL;
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too_small:
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GST_LOG_OBJECT (self, "Invalid rtp packet (too small), ignoring");
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gst_adapter_clear (self->adapter);
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self->started = FALSE;
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goto done;
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}
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static gboolean
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gst_rtp_vp8_depay_set_caps (GstRTPBaseDepayload * depayload, GstCaps * caps)
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{
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GstCaps *srccaps = gst_caps_new_simple ("video/x-vp8",
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"framerate", GST_TYPE_FRACTION, 0, 1,
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NULL);
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gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps);
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gst_caps_unref (srccaps);
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return TRUE;
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}
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gboolean
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gst_rtp_vp8_depay_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtpvp8depay",
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GST_RANK_MARGINAL, GST_TYPE_RTP_VP8_DEPAY);
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}
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