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Even if one woul hope one pixel can fit in a MTU, ensure we do not overwrite a buffer if this is not the case. Spotted while looking at Coverity 1208786
541 lines
16 KiB
C
541 lines
16 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 <string.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtpvrawpay.h"
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GST_DEBUG_CATEGORY_STATIC (rtpvrawpay_debug);
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#define GST_CAT_DEFAULT (rtpvrawpay_debug)
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static GstStaticPadTemplate gst_rtp_vraw_pay_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 ("video/x-raw, "
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"format = (string) { RGB, RGBA, BGR, BGRA, AYUV, UYVY, I420, Y41B, UYVP }, "
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"width = (int) [ 1, 32767 ], " "height = (int) [ 1, 32767 ]; ")
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);
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static GstStaticPadTemplate gst_rtp_vraw_pay_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 ("application/x-rtp, "
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"media = (string) \"video\", "
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"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
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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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"colorimetry = (string) { \"BT601-5\", \"BT709-2\", \"SMPTE240M\" }"
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/* optional
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* interlace =
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* top-field-first =
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* chroma-position = (string)
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* gamma = (float)
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*/
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)
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);
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static gboolean gst_rtp_vraw_pay_setcaps (GstRTPBasePayload * payload,
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GstCaps * caps);
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static GstFlowReturn gst_rtp_vraw_pay_handle_buffer (GstRTPBasePayload *
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payload, GstBuffer * buffer);
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G_DEFINE_TYPE (GstRtpVRawPay, gst_rtp_vraw_pay, GST_TYPE_RTP_BASE_PAYLOAD)
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static void gst_rtp_vraw_pay_class_init (GstRtpVRawPayClass * klass)
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{
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GstRTPBasePayloadClass *gstrtpbasepayload_class;
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GstElementClass *gstelement_class;
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gstelement_class = (GstElementClass *) klass;
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gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
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gstrtpbasepayload_class->set_caps = gst_rtp_vraw_pay_setcaps;
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gstrtpbasepayload_class->handle_buffer = gst_rtp_vraw_pay_handle_buffer;
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_rtp_vraw_pay_src_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_rtp_vraw_pay_sink_template));
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gst_element_class_set_static_metadata (gstelement_class,
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"RTP Raw Video payloader", "Codec/Payloader/Network/RTP",
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"Payload raw video as RTP packets (RFC 4175)",
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"Wim Taymans <wim.taymans@gmail.com>");
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GST_DEBUG_CATEGORY_INIT (rtpvrawpay_debug, "rtpvrawpay", 0,
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"Raw video RTP Payloader");
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}
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static void
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gst_rtp_vraw_pay_init (GstRtpVRawPay * rtpvrawpay)
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{
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}
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static gboolean
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gst_rtp_vraw_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps)
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{
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GstRtpVRawPay *rtpvrawpay;
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gboolean res;
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gint pgroup, xinc, yinc;
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const gchar *depthstr, *samplingstr, *colorimetrystr;
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gchar *wstr, *hstr;
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gint depth;
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GstVideoInfo info;
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rtpvrawpay = GST_RTP_VRAW_PAY (payload);
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if (!gst_video_info_from_caps (&info, caps))
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goto invalid_caps;
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rtpvrawpay->vinfo = info;
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if (gst_video_colorimetry_matches (&info.colorimetry,
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GST_VIDEO_COLORIMETRY_BT601)) {
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colorimetrystr = "BT601-5";
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} else if (gst_video_colorimetry_matches (&info.colorimetry,
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GST_VIDEO_COLORIMETRY_BT709)) {
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colorimetrystr = "BT709-2";
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} else if (gst_video_colorimetry_matches (&info.colorimetry,
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GST_VIDEO_COLORIMETRY_SMPTE240M)) {
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colorimetrystr = "SMPTE240M";
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} else {
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colorimetrystr = "SMPTE240M";
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}
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xinc = yinc = 1;
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/* these values are the only thing we can do */
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depthstr = "8";
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depth = 8;
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switch (GST_VIDEO_INFO_FORMAT (&info)) {
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case GST_VIDEO_FORMAT_RGBA:
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samplingstr = "RGBA";
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pgroup = 4;
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break;
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case GST_VIDEO_FORMAT_BGRA:
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samplingstr = "BGRA";
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pgroup = 4;
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break;
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case GST_VIDEO_FORMAT_RGB:
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samplingstr = "RGB";
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pgroup = 3;
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break;
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case GST_VIDEO_FORMAT_BGR:
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samplingstr = "BGR";
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pgroup = 3;
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break;
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case GST_VIDEO_FORMAT_AYUV:
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samplingstr = "YCbCr-4:4:4";
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pgroup = 3;
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break;
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case GST_VIDEO_FORMAT_UYVY:
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samplingstr = "YCbCr-4:2:2";
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pgroup = 4;
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xinc = 2;
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break;
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case GST_VIDEO_FORMAT_Y41B:
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samplingstr = "YCbCr-4:1:1";
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pgroup = 6;
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xinc = 4;
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break;
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case GST_VIDEO_FORMAT_I420:
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samplingstr = "YCbCr-4:2:0";
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pgroup = 6;
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xinc = yinc = 2;
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break;
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case GST_VIDEO_FORMAT_UYVP:
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samplingstr = "YCbCr-4:2:2";
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pgroup = 5;
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xinc = 2;
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depth = 10;
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depthstr = "10";
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break;
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default:
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goto unknown_format;
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break;
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}
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if (GST_VIDEO_INFO_IS_INTERLACED (&info)) {
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yinc *= 2;
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}
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rtpvrawpay->pgroup = pgroup;
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rtpvrawpay->xinc = xinc;
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rtpvrawpay->yinc = yinc;
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rtpvrawpay->depth = depth;
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GST_DEBUG_OBJECT (payload, "width %d, height %d, sampling %s",
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GST_VIDEO_INFO_WIDTH (&info), GST_VIDEO_INFO_HEIGHT (&info), samplingstr);
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GST_DEBUG_OBJECT (payload, "xinc %d, yinc %d, pgroup %d", xinc, yinc, pgroup);
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wstr = g_strdup_printf ("%d", GST_VIDEO_INFO_WIDTH (&info));
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hstr = g_strdup_printf ("%d", GST_VIDEO_INFO_HEIGHT (&info));
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gst_rtp_base_payload_set_options (payload, "video", TRUE, "RAW", 90000);
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if (GST_VIDEO_INFO_IS_INTERLACED (&info)) {
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res = gst_rtp_base_payload_set_outcaps (payload, "sampling", G_TYPE_STRING,
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samplingstr, "depth", G_TYPE_STRING, depthstr, "width", G_TYPE_STRING,
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wstr, "height", G_TYPE_STRING, hstr, "colorimetry", G_TYPE_STRING,
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colorimetrystr, "interlace", G_TYPE_STRING, "true", NULL);
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} else {
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res = gst_rtp_base_payload_set_outcaps (payload, "sampling", G_TYPE_STRING,
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samplingstr, "depth", G_TYPE_STRING, depthstr, "width", G_TYPE_STRING,
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wstr, "height", G_TYPE_STRING, hstr, "colorimetry", G_TYPE_STRING,
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colorimetrystr, NULL);
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}
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g_free (wstr);
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g_free (hstr);
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return res;
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/* ERRORS */
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invalid_caps:
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{
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GST_ERROR_OBJECT (payload, "could not parse caps");
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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 (payload, "unknown caps format");
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return FALSE;
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}
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}
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static GstFlowReturn
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gst_rtp_vraw_pay_handle_buffer (GstRTPBasePayload * payload, GstBuffer * buffer)
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{
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GstRtpVRawPay *rtpvrawpay;
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GstFlowReturn ret = GST_FLOW_OK;
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guint line, offset;
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guint8 *p0, *yp, *up, *vp;
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guint ystride, uvstride;
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guint pgroup;
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guint mtu;
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guint width, height;
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gint field;
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GstVideoFrame frame;
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gint interlaced;
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GstRTPBuffer rtp = { NULL, };
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rtpvrawpay = GST_RTP_VRAW_PAY (payload);
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gst_video_frame_map (&frame, &rtpvrawpay->vinfo, buffer, GST_MAP_READ);
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GST_LOG_OBJECT (rtpvrawpay, "new frame of %" G_GSIZE_FORMAT " bytes",
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gst_buffer_get_size (buffer));
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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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mtu = GST_RTP_BASE_PAYLOAD_MTU (payload);
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/* amount of bytes for one pixel */
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pgroup = rtpvrawpay->pgroup;
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width = GST_VIDEO_INFO_WIDTH (&rtpvrawpay->vinfo);
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height = GST_VIDEO_INFO_HEIGHT (&rtpvrawpay->vinfo);
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interlaced = GST_VIDEO_INFO_IS_INTERLACED (&rtpvrawpay->vinfo);
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/* start with line 0, offset 0 */
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for (field = 0; field < 1 + interlaced; field++) {
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line = field;
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offset = 0;
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/* write all lines */
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while (line < height) {
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guint left;
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GstBuffer *out;
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guint8 *outdata, *headers;
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gboolean next_line;
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guint length, cont, pixels;
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/* get the max allowed payload length size, we try to fill the complete MTU */
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left = gst_rtp_buffer_calc_payload_len (mtu, 0, 0);
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out = gst_rtp_buffer_new_allocate (left, 0, 0);
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if (field == 0) {
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GST_BUFFER_TIMESTAMP (out) = GST_BUFFER_TIMESTAMP (buffer);
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} else {
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GST_BUFFER_TIMESTAMP (out) = GST_BUFFER_TIMESTAMP (buffer) +
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GST_BUFFER_DURATION (buffer) / 2;
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}
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gst_rtp_buffer_map (out, GST_MAP_WRITE, &rtp);
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outdata = gst_rtp_buffer_get_payload (&rtp);
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GST_LOG_OBJECT (rtpvrawpay, "created buffer of size %u for MTU %u", left,
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mtu);
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/*
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Extended Sequence Number | Length |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |F| Line No |C| Offset |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Length |F| Line No |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |C| Offset | .
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ .
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* . .
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* . Two (partial) lines of video data .
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* . .
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* +---------------------------------------------------------------+
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*/
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/* need 2 bytes for the extended sequence number */
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*outdata++ = 0;
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*outdata++ = 0;
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left -= 2;
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/* the headers start here */
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headers = outdata;
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/* make sure we can fit at least *one* header and pixel */
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if (!(left > (6 + pgroup))) {
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gst_rtp_buffer_unmap (&rtp);
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gst_buffer_unref (out);
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goto too_small;
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}
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/* while we can fit at least one header and one pixel */
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while (left > (6 + pgroup)) {
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/* we need a 6 bytes header */
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left -= 6;
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/* get how may bytes we need for the remaining pixels */
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pixels = width - offset;
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length = (pixels * pgroup) / rtpvrawpay->xinc;
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if (left >= length) {
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/* pixels and header fit completely, we will write them and skip to the
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* next line. */
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next_line = TRUE;
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} else {
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/* line does not fit completely, see how many pixels fit */
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pixels = (left / pgroup) * rtpvrawpay->xinc;
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length = (pixels * pgroup) / rtpvrawpay->xinc;
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next_line = FALSE;
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}
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GST_LOG_OBJECT (rtpvrawpay, "filling %u bytes in %u pixels", length,
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pixels);
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left -= length;
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/* write length */
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*outdata++ = (length >> 8) & 0xff;
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*outdata++ = length & 0xff;
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/* write line no */
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*outdata++ = ((line >> 8) & 0x7f) | ((field << 7) & 0x80);
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*outdata++ = line & 0xff;
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if (next_line) {
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/* go to next line we do this here to make the check below easier */
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line += rtpvrawpay->yinc;
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}
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/* calculate continuation marker */
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cont = (left > (6 + pgroup) && line < height) ? 0x80 : 0x00;
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/* write offset and continuation marker */
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*outdata++ = ((offset >> 8) & 0x7f) | cont;
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*outdata++ = offset & 0xff;
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if (next_line) {
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/* reset offset */
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offset = 0;
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GST_LOG_OBJECT (rtpvrawpay, "go to next line %u", line);
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} else {
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offset += pixels;
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GST_LOG_OBJECT (rtpvrawpay, "next offset %u", offset);
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}
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if (!cont)
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break;
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}
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GST_LOG_OBJECT (rtpvrawpay, "consumed %u bytes",
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(guint) (outdata - headers));
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/* second pass, read headers and write the data */
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while (TRUE) {
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guint offs, lin;
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/* read length and cont */
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length = (headers[0] << 8) | headers[1];
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lin = ((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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pixels = length / pgroup;
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headers += 6;
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GST_LOG_OBJECT (payload,
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"writing length %u, line %u, offset %u, cont %d", length, lin, offs,
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cont);
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switch (GST_VIDEO_INFO_FORMAT (&rtpvrawpay->vinfo)) {
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case GST_VIDEO_FORMAT_RGB:
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case GST_VIDEO_FORMAT_RGBA:
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case GST_VIDEO_FORMAT_BGR:
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case GST_VIDEO_FORMAT_BGRA:
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case GST_VIDEO_FORMAT_UYVY:
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case GST_VIDEO_FORMAT_UYVP:
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offs /= rtpvrawpay->xinc;
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memcpy (outdata, p0 + (lin * ystride) + (offs * pgroup), length);
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outdata += length;
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break;
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case GST_VIDEO_FORMAT_AYUV:
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{
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gint i;
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guint8 *datap;
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datap = p0 + (lin * ystride) + (offs * 4);
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for (i = 0; i < pixels; i++) {
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*outdata++ = datap[2];
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*outdata++ = datap[1];
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*outdata++ = datap[3];
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datap += 4;
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}
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break;
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}
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case GST_VIDEO_FORMAT_I420:
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{
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gint i;
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guint uvoff;
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guint8 *yd1p, *yd2p, *udp, *vdp;
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yd1p = yp + (lin * ystride) + (offs);
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yd2p = yd1p + ystride;
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uvoff =
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(lin / rtpvrawpay->yinc * uvstride) + (offs / rtpvrawpay->xinc);
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udp = up + uvoff;
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vdp = vp + uvoff;
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for (i = 0; i < pixels; i++) {
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*outdata++ = *yd1p++;
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*outdata++ = *yd1p++;
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*outdata++ = *yd2p++;
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*outdata++ = *yd2p++;
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*outdata++ = *udp++;
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*outdata++ = *vdp++;
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}
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break;
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}
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case GST_VIDEO_FORMAT_Y41B:
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{
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gint i;
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guint uvoff;
|
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guint8 *ydp, *udp, *vdp;
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ydp = yp + (lin * ystride) + offs;
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uvoff =
|
|
(lin / rtpvrawpay->yinc * uvstride) + (offs / rtpvrawpay->xinc);
|
|
udp = up + uvoff;
|
|
vdp = vp + uvoff;
|
|
|
|
for (i = 0; i < pixels; i++) {
|
|
*outdata++ = *udp++;
|
|
*outdata++ = *ydp++;
|
|
*outdata++ = *ydp++;
|
|
*outdata++ = *vdp++;
|
|
*outdata++ = *ydp++;
|
|
*outdata++ = *ydp++;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
gst_rtp_buffer_unmap (&rtp);
|
|
gst_buffer_unref (out);
|
|
goto unknown_sampling;
|
|
}
|
|
|
|
if (!cont)
|
|
break;
|
|
}
|
|
|
|
if (line >= height) {
|
|
GST_LOG_OBJECT (rtpvrawpay, "field/frame complete, set marker");
|
|
gst_rtp_buffer_set_marker (&rtp, TRUE);
|
|
}
|
|
gst_rtp_buffer_unmap (&rtp);
|
|
if (left > 0) {
|
|
GST_LOG_OBJECT (rtpvrawpay, "we have %u bytes left", left);
|
|
gst_buffer_resize (out, 0, gst_buffer_get_size (out) - left);
|
|
}
|
|
|
|
/* push buffer */
|
|
ret = gst_rtp_base_payload_push (payload, out);
|
|
}
|
|
|
|
}
|
|
|
|
gst_video_frame_unmap (&frame);
|
|
gst_buffer_unref (buffer);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
unknown_sampling:
|
|
{
|
|
GST_ELEMENT_ERROR (payload, STREAM, FORMAT,
|
|
(NULL), ("unimplemented sampling"));
|
|
gst_video_frame_unmap (&frame);
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
too_small:
|
|
{
|
|
GST_ELEMENT_ERROR (payload, RESOURCE, NO_SPACE_LEFT,
|
|
(NULL), ("not enough space to send at least one pixel"));
|
|
gst_video_frame_unmap (&frame);
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_rtp_vraw_pay_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "rtpvrawpay",
|
|
GST_RANK_SECONDARY, GST_TYPE_RTP_VRAW_PAY);
|
|
}
|