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667 lines
18 KiB
C
667 lines
18 KiB
C
/* GStreamer
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* Copyright (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., 51 Franklin St, Fifth Floor,
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* 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 <gst/rtp/gstrtpbuffer.h>
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#include <gst/video/video.h>
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#include <string.h>
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#include <stdlib.h>
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#include "gstrtpvrawdepay.h"
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#include "gstrtputils.h"
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GST_DEBUG_CATEGORY_STATIC (rtpvrawdepay_debug);
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#define GST_CAT_DEFAULT (rtpvrawdepay_debug)
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static GstStaticPadTemplate gst_rtp_vraw_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-raw")
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);
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static GstStaticPadTemplate gst_rtp_vraw_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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"media = (string) \"video\", "
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"clock-rate = (int) 90000, "
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"encoding-name = (string) \"RAW\", "
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"sampling = (string) { \"RGB\", \"RGBA\", \"BGR\", \"BGRA\", "
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"\"YCbCr-4:4:4\", \"YCbCr-4:2:2\", \"YCbCr-4:2:0\", "
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"\"YCbCr-4:1:1\" },"
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/* we cannot express these as strings
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* "width = (string) [1 32767],"
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* "height = (string) [1 32767],"
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*/
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"depth = (string) { \"8\", \"10\", \"12\", \"16\" }")
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);
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#define gst_rtp_vraw_depay_parent_class parent_class
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G_DEFINE_TYPE (GstRtpVRawDepay, gst_rtp_vraw_depay,
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GST_TYPE_RTP_BASE_DEPAYLOAD);
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static gboolean gst_rtp_vraw_depay_setcaps (GstRTPBaseDepayload * depayload,
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GstCaps * caps);
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static GstBuffer *gst_rtp_vraw_depay_process_packet (GstRTPBaseDepayload *
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depay, GstRTPBuffer * rtp);
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static GstStateChangeReturn gst_rtp_vraw_depay_change_state (GstElement *
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element, GstStateChange transition);
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static gboolean gst_rtp_vraw_depay_handle_event (GstRTPBaseDepayload * filter,
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GstEvent * event);
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static void
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gst_rtp_vraw_depay_class_init (GstRtpVRawDepayClass * klass)
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{
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GstElementClass *gstelement_class;
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GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
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gstelement_class = (GstElementClass *) klass;
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gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
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gstelement_class->change_state = gst_rtp_vraw_depay_change_state;
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gstrtpbasedepayload_class->set_caps = gst_rtp_vraw_depay_setcaps;
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gstrtpbasedepayload_class->process_rtp_packet =
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gst_rtp_vraw_depay_process_packet;
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gstrtpbasedepayload_class->handle_event = gst_rtp_vraw_depay_handle_event;
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_rtp_vraw_depay_src_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_rtp_vraw_depay_sink_template);
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gst_element_class_set_static_metadata (gstelement_class,
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"RTP Raw Video depayloader", "Codec/Depayloader/Network/RTP",
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"Extracts raw video from RTP packets (RFC 4175)",
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"Wim Taymans <wim.taymans@gmail.com>");
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GST_DEBUG_CATEGORY_INIT (rtpvrawdepay_debug, "rtpvrawdepay", 0,
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"raw video RTP Depayloader");
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}
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static void
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gst_rtp_vraw_depay_init (GstRtpVRawDepay * rtpvrawdepay)
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{
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}
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static void
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gst_rtp_vraw_depay_reset (GstRtpVRawDepay * rtpvrawdepay, gboolean full)
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{
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if (rtpvrawdepay->outbuf) {
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gst_video_frame_unmap (&rtpvrawdepay->frame);
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gst_buffer_unref (rtpvrawdepay->outbuf);
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rtpvrawdepay->outbuf = NULL;
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}
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rtpvrawdepay->timestamp = -1;
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if (full && rtpvrawdepay->pool) {
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gst_buffer_pool_set_active (rtpvrawdepay->pool, FALSE);
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gst_object_unref (rtpvrawdepay->pool);
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rtpvrawdepay->pool = NULL;
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}
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}
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static GstFlowReturn
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gst_rtp_vraw_depay_negotiate_pool (GstRtpVRawDepay * depay, GstCaps * caps,
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GstVideoInfo * info)
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{
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GstQuery *query;
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GstBufferPool *pool = NULL;
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guint size, min, max;
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GstStructure *config;
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/* find a pool for the negotiated caps now */
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query = gst_query_new_allocation (caps, TRUE);
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if (!gst_pad_peer_query (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depay), query)) {
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/* not a problem, we use the defaults of query */
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GST_DEBUG_OBJECT (depay, "could not get downstream ALLOCATION hints");
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}
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if (gst_query_get_n_allocation_pools (query) > 0) {
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/* we got configuration from our peer, parse them */
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gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
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} else {
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GST_DEBUG_OBJECT (depay, "didn't get downstream pool hints");
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size = info->size;
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min = max = 0;
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}
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if (pool == NULL) {
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/* we did not get a pool, make one ourselves then */
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pool = gst_video_buffer_pool_new ();
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}
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if (depay->pool)
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gst_object_unref (depay->pool);
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depay->pool = pool;
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config = gst_buffer_pool_get_config (pool);
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gst_buffer_pool_config_set_params (config, caps, size, min, max);
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if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
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/* just set the metadata, if the pool can support it we will transparently use
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* it through the video info API. We could also see if the pool support this
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* metadata and only activate it then. */
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gst_buffer_pool_config_add_option (config,
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GST_BUFFER_POOL_OPTION_VIDEO_META);
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}
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gst_buffer_pool_set_config (pool, config);
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/* and activate */
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gst_buffer_pool_set_active (pool, TRUE);
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gst_query_unref (query);
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return GST_FLOW_OK;
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}
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static gboolean
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gst_rtp_vraw_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
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{
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GstStructure *structure;
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GstRtpVRawDepay *rtpvrawdepay;
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gint clock_rate;
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const gchar *str;
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gint format, width, height, depth, pgroup, xinc, yinc;
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GstCaps *srccaps;
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gboolean res;
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GstFlowReturn ret;
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rtpvrawdepay = GST_RTP_VRAW_DEPAY (depayload);
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structure = gst_caps_get_structure (caps, 0);
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xinc = yinc = 1;
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if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
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clock_rate = 90000; /* default */
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depayload->clock_rate = clock_rate;
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if (!(str = gst_structure_get_string (structure, "width")))
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goto no_width;
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width = atoi (str);
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if (!(str = gst_structure_get_string (structure, "height")))
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goto no_height;
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height = atoi (str);
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if (!(str = gst_structure_get_string (structure, "depth")))
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goto no_depth;
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depth = atoi (str);
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/* optional interlace value but we don't handle interlaced
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* formats yet */
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if (gst_structure_get_string (structure, "interlace"))
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goto interlaced;
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if (!(str = gst_structure_get_string (structure, "sampling")))
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goto no_sampling;
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if (!strcmp (str, "RGB")) {
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format = GST_VIDEO_FORMAT_RGB;
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pgroup = 3;
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} else if (!strcmp (str, "RGBA")) {
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format = GST_VIDEO_FORMAT_RGBA;
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pgroup = 4;
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} else if (!strcmp (str, "BGR")) {
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format = GST_VIDEO_FORMAT_BGR;
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pgroup = 3;
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} else if (!strcmp (str, "BGRA")) {
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format = GST_VIDEO_FORMAT_BGRA;
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pgroup = 4;
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} else if (!strcmp (str, "YCbCr-4:4:4")) {
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format = GST_VIDEO_FORMAT_AYUV;
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pgroup = 3;
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} else if (!strcmp (str, "YCbCr-4:2:2")) {
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if (depth == 8) {
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format = GST_VIDEO_FORMAT_UYVY;
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pgroup = 4;
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} else if (depth == 10) {
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format = GST_VIDEO_FORMAT_UYVP;
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pgroup = 5;
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} else
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goto unknown_format;
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xinc = 2;
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} else if (!strcmp (str, "YCbCr-4:2:0")) {
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format = GST_VIDEO_FORMAT_I420;
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pgroup = 6;
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xinc = yinc = 2;
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} else if (!strcmp (str, "YCbCr-4:1:1")) {
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format = GST_VIDEO_FORMAT_Y41B;
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pgroup = 6;
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xinc = 4;
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} else {
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goto unknown_format;
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}
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gst_video_info_init (&rtpvrawdepay->vinfo);
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gst_video_info_set_format (&rtpvrawdepay->vinfo, format, width, height);
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GST_VIDEO_INFO_FPS_N (&rtpvrawdepay->vinfo) = 0;
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GST_VIDEO_INFO_FPS_D (&rtpvrawdepay->vinfo) = 1;
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rtpvrawdepay->pgroup = pgroup;
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rtpvrawdepay->xinc = xinc;
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rtpvrawdepay->yinc = yinc;
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srccaps = gst_video_info_to_caps (&rtpvrawdepay->vinfo);
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res = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps);
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gst_caps_unref (srccaps);
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GST_DEBUG_OBJECT (depayload, "width %d, height %d, format %d", width, height,
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format);
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GST_DEBUG_OBJECT (depayload, "xinc %d, yinc %d, pgroup %d",
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xinc, yinc, pgroup);
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/* negotiate a bufferpool */
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if ((ret = gst_rtp_vraw_depay_negotiate_pool (rtpvrawdepay, srccaps,
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&rtpvrawdepay->vinfo)) != GST_FLOW_OK)
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goto no_bufferpool;
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return res;
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/* ERRORS */
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no_width:
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{
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GST_ERROR_OBJECT (depayload, "no width specified");
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return FALSE;
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}
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no_height:
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{
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GST_ERROR_OBJECT (depayload, "no height specified");
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return FALSE;
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}
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no_depth:
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{
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GST_ERROR_OBJECT (depayload, "no depth specified");
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return FALSE;
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}
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interlaced:
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{
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GST_ERROR_OBJECT (depayload, "interlaced formats not supported yet");
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return FALSE;
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}
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no_sampling:
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{
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GST_ERROR_OBJECT (depayload, "no sampling specified");
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return FALSE;
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}
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unknown_format:
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{
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GST_ERROR_OBJECT (depayload, "unknown sampling format '%s'", str);
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return FALSE;
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}
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no_bufferpool:
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{
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GST_DEBUG_OBJECT (depayload, "no bufferpool");
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return FALSE;
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}
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}
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static GstBuffer *
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gst_rtp_vraw_depay_process_packet (GstRTPBaseDepayload * depayload,
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GstRTPBuffer * rtp)
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{
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GstRtpVRawDepay *rtpvrawdepay;
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guint8 *payload, *p0, *yp, *up, *vp, *headers;
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guint32 timestamp;
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guint cont, ystride, uvstride, pgroup, payload_len;
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gint width, height, xinc, yinc;
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GstVideoFrame *frame;
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gboolean marker;
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GstBuffer *outbuf = NULL;
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rtpvrawdepay = GST_RTP_VRAW_DEPAY (depayload);
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timestamp = gst_rtp_buffer_get_timestamp (rtp);
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if (timestamp != rtpvrawdepay->timestamp || rtpvrawdepay->outbuf == NULL) {
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GstBuffer *new_buffer;
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GstFlowReturn ret;
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GST_LOG_OBJECT (depayload, "new frame with timestamp %u", timestamp);
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/* new timestamp, flush old buffer and create new output buffer */
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if (rtpvrawdepay->outbuf) {
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gst_video_frame_unmap (&rtpvrawdepay->frame);
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gst_rtp_base_depayload_push (depayload, rtpvrawdepay->outbuf);
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rtpvrawdepay->outbuf = NULL;
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}
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if (gst_pad_check_reconfigure (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload))) {
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GstCaps *caps;
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caps =
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gst_pad_get_current_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload));
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gst_rtp_vraw_depay_negotiate_pool (rtpvrawdepay, caps,
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&rtpvrawdepay->vinfo);
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gst_caps_unref (caps);
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}
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ret =
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gst_buffer_pool_acquire_buffer (rtpvrawdepay->pool, &new_buffer, NULL);
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if (G_UNLIKELY (ret != GST_FLOW_OK))
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goto alloc_failed;
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/* clear timestamp from alloc... */
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GST_BUFFER_PTS (new_buffer) = -1;
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if (!gst_video_frame_map (&rtpvrawdepay->frame, &rtpvrawdepay->vinfo,
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new_buffer, GST_MAP_WRITE | GST_VIDEO_FRAME_MAP_FLAG_NO_REF)) {
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gst_buffer_unref (new_buffer);
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goto invalid_frame;
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}
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rtpvrawdepay->outbuf = new_buffer;
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rtpvrawdepay->timestamp = timestamp;
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}
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frame = &rtpvrawdepay->frame;
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g_assert (frame->buffer != NULL);
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/* get pointer and strides of the planes */
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p0 = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
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yp = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
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up = GST_VIDEO_FRAME_COMP_DATA (frame, 1);
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vp = GST_VIDEO_FRAME_COMP_DATA (frame, 2);
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ystride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
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uvstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 1);
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pgroup = rtpvrawdepay->pgroup;
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width = GST_VIDEO_INFO_WIDTH (&rtpvrawdepay->vinfo);
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height = GST_VIDEO_INFO_HEIGHT (&rtpvrawdepay->vinfo);
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xinc = rtpvrawdepay->xinc;
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yinc = rtpvrawdepay->yinc;
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payload = gst_rtp_buffer_get_payload (rtp);
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payload_len = gst_rtp_buffer_get_payload_len (rtp);
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if (payload_len < 3)
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goto short_packet;
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/* skip extended seqnum */
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payload += 2;
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payload_len -= 2;
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/* remember header position */
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headers = payload;
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gst_rtp_copy_video_meta (rtpvrawdepay, frame->buffer, rtp->buffer);
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/* find data start */
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do {
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if (payload_len < 6)
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goto short_packet;
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cont = payload[4] & 0x80;
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payload += 6;
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payload_len -= 6;
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} while (cont);
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while (TRUE) {
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guint length, line, offs, plen;
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guint8 *datap;
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/* stop when we run out of data */
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if (payload_len == 0)
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break;
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/* read length and cont. This should work because we iterated the headers
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* above. */
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length = (headers[0] << 8) | headers[1];
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line = ((headers[2] & 0x7f) << 8) | headers[3];
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offs = ((headers[4] & 0x7f) << 8) | headers[5];
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cont = headers[4] & 0x80;
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headers += 6;
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/* length must be a multiple of pgroup */
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if (length % pgroup != 0)
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goto wrong_length;
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if (length > payload_len)
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length = payload_len;
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/* sanity check */
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if (line > (height - yinc)) {
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GST_WARNING_OBJECT (depayload, "skipping line %d: out of range", line);
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goto next;
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}
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if (offs > (width - xinc)) {
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GST_WARNING_OBJECT (depayload, "skipping offset %d: out of range", offs);
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goto next;
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}
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/* calculate the maximum amount of bytes we can use per line */
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if (offs + ((length / pgroup) * xinc) > width) {
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plen = ((width - offs) * pgroup) / xinc;
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GST_WARNING_OBJECT (depayload, "clipping length %d, offset %d, plen %d",
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length, offs, plen);
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} else
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plen = length;
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GST_LOG_OBJECT (depayload,
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|
"writing length %u/%u, line %u, offset %u, remaining %u", plen, length,
|
|
line, offs, payload_len);
|
|
|
|
switch (GST_VIDEO_INFO_FORMAT (&rtpvrawdepay->vinfo)) {
|
|
case GST_VIDEO_FORMAT_RGB:
|
|
case GST_VIDEO_FORMAT_RGBA:
|
|
case GST_VIDEO_FORMAT_BGR:
|
|
case GST_VIDEO_FORMAT_BGRA:
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
case GST_VIDEO_FORMAT_UYVP:
|
|
/* samples are packed just like gstreamer packs them */
|
|
offs /= xinc;
|
|
datap = p0 + (line * ystride) + (offs * pgroup);
|
|
|
|
memcpy (datap, payload, plen);
|
|
break;
|
|
case GST_VIDEO_FORMAT_AYUV:
|
|
{
|
|
gint i;
|
|
guint8 *p;
|
|
|
|
datap = p0 + (line * ystride) + (offs * 4);
|
|
p = payload;
|
|
|
|
/* samples are packed in order Cb-Y-Cr for both interlaced and
|
|
* progressive frames */
|
|
for (i = 0; i < plen; i += pgroup) {
|
|
*datap++ = 0;
|
|
*datap++ = p[1];
|
|
*datap++ = p[0];
|
|
*datap++ = p[2];
|
|
p += pgroup;
|
|
}
|
|
break;
|
|
}
|
|
case GST_VIDEO_FORMAT_I420:
|
|
{
|
|
gint i;
|
|
guint uvoff;
|
|
guint8 *yd1p, *yd2p, *udp, *vdp, *p;
|
|
|
|
yd1p = yp + (line * ystride) + (offs);
|
|
yd2p = yd1p + ystride;
|
|
uvoff = (line / yinc * uvstride) + (offs / xinc);
|
|
|
|
udp = up + uvoff;
|
|
vdp = vp + uvoff;
|
|
p = payload;
|
|
|
|
/* line 0/1: Y00-Y01-Y10-Y11-Cb00-Cr00 Y02-Y03-Y12-Y13-Cb01-Cr01 ... */
|
|
for (i = 0; i < plen; i += pgroup) {
|
|
*yd1p++ = p[0];
|
|
*yd1p++ = p[1];
|
|
*yd2p++ = p[2];
|
|
*yd2p++ = p[3];
|
|
*udp++ = p[4];
|
|
*vdp++ = p[5];
|
|
p += pgroup;
|
|
}
|
|
break;
|
|
}
|
|
case GST_VIDEO_FORMAT_Y41B:
|
|
{
|
|
gint i;
|
|
guint uvoff;
|
|
guint8 *ydp, *udp, *vdp, *p;
|
|
|
|
ydp = yp + (line * ystride) + (offs);
|
|
uvoff = (line / yinc * uvstride) + (offs / xinc);
|
|
|
|
udp = up + uvoff;
|
|
vdp = vp + uvoff;
|
|
p = payload;
|
|
|
|
/* Samples are packed in order Cb0-Y0-Y1-Cr0-Y2-Y3 for both interlaced
|
|
* and progressive scan lines */
|
|
for (i = 0; i < plen; i += pgroup) {
|
|
*udp++ = p[0];
|
|
*ydp++ = p[1];
|
|
*ydp++ = p[2];
|
|
*vdp++ = p[3];
|
|
*ydp++ = p[4];
|
|
*ydp++ = p[5];
|
|
p += pgroup;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
goto unknown_sampling;
|
|
}
|
|
|
|
next:
|
|
if (!cont)
|
|
break;
|
|
|
|
payload += length;
|
|
payload_len -= length;
|
|
}
|
|
|
|
marker = gst_rtp_buffer_get_marker (rtp);
|
|
|
|
if (marker) {
|
|
GST_LOG_OBJECT (depayload, "marker, flushing frame");
|
|
gst_video_frame_unmap (&rtpvrawdepay->frame);
|
|
outbuf = rtpvrawdepay->outbuf;
|
|
rtpvrawdepay->outbuf = NULL;
|
|
rtpvrawdepay->timestamp = -1;
|
|
}
|
|
return outbuf;
|
|
|
|
/* ERRORS */
|
|
unknown_sampling:
|
|
{
|
|
GST_ELEMENT_ERROR (depayload, STREAM, FORMAT,
|
|
(NULL), ("unimplemented sampling"));
|
|
return NULL;
|
|
}
|
|
alloc_failed:
|
|
{
|
|
GST_WARNING_OBJECT (depayload, "failed to alloc output buffer");
|
|
return NULL;
|
|
}
|
|
invalid_frame:
|
|
{
|
|
GST_ERROR_OBJECT (depayload, "could not map video frame");
|
|
return NULL;
|
|
}
|
|
wrong_length:
|
|
{
|
|
GST_WARNING_OBJECT (depayload, "length not multiple of pgroup");
|
|
return NULL;
|
|
}
|
|
short_packet:
|
|
{
|
|
GST_WARNING_OBJECT (depayload, "short packet");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_vraw_depay_handle_event (GstRTPBaseDepayload * filter, GstEvent * event)
|
|
{
|
|
gboolean ret;
|
|
GstRtpVRawDepay *rtpvrawdepay;
|
|
|
|
rtpvrawdepay = GST_RTP_VRAW_DEPAY (filter);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_STOP:
|
|
gst_rtp_vraw_depay_reset (rtpvrawdepay, FALSE);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret =
|
|
GST_RTP_BASE_DEPAYLOAD_CLASS (parent_class)->handle_event (filter, event);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_rtp_vraw_depay_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstRtpVRawDepay *rtpvrawdepay;
|
|
GstStateChangeReturn ret;
|
|
|
|
rtpvrawdepay = GST_RTP_VRAW_DEPAY (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
gst_rtp_vraw_depay_reset (rtpvrawdepay, TRUE);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_rtp_vraw_depay_reset (rtpvrawdepay, TRUE);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
gboolean
|
|
gst_rtp_vraw_depay_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "rtpvrawdepay",
|
|
GST_RANK_SECONDARY, GST_TYPE_RTP_VRAW_DEPAY);
|
|
}
|