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gst/rtp/: Add a jpeg depayloader.
Original commit message from CVS: * gst/rtp/Makefile.am: * gst/rtp/gstrtp.c: (plugin_init): * gst/rtp/gstrtpjpegdepay.c: (gst_rtp_jpeg_depay_base_init), (gst_rtp_jpeg_depay_class_init), (gst_rtp_jpeg_depay_init), (gst_rtp_jpeg_depay_finalize), (MakeTables), (MakeQuantHeader), (MakeHuffmanHeader), (MakeDRIHeader), (MakeHeaders), (gst_rtp_jpeg_depay_setcaps), (gst_rtp_jpeg_depay_process), (gst_rtp_jpeg_depay_change_state), (gst_rtp_jpeg_depay_plugin_init): * gst/rtp/gstrtpjpegdepay.h: Add a jpeg depayloader. * gst/rtp/gstrtpjpegpay.c: Set the default properties on the payloader to better defaults.
This commit is contained in:
Wim Taymans
parent
b51bb31b73
commit
5c9ebea381
6 changed files with 703 additions and 4 deletions
17
ChangeLog
17
ChangeLog
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@ -1,3 +1,20 @@
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2008-11-14 Wim Taymans <wim.taymans@collabora.co.uk>
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* gst/rtp/Makefile.am:
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* gst/rtp/gstrtp.c: (plugin_init):
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* gst/rtp/gstrtpjpegdepay.c: (gst_rtp_jpeg_depay_base_init),
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(gst_rtp_jpeg_depay_class_init), (gst_rtp_jpeg_depay_init),
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(gst_rtp_jpeg_depay_finalize), (MakeTables), (MakeQuantHeader),
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(MakeHuffmanHeader), (MakeDRIHeader), (MakeHeaders),
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(gst_rtp_jpeg_depay_setcaps), (gst_rtp_jpeg_depay_process),
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(gst_rtp_jpeg_depay_change_state),
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(gst_rtp_jpeg_depay_plugin_init):
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* gst/rtp/gstrtpjpegdepay.h:
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Add a jpeg depayloader.
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* gst/rtp/gstrtpjpegpay.c:
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Set the default properties on the payloader to better defaults.
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2008-11-14 Stefan Kost <ensonic@users.sf.net>
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* sys/v4l2/gstv4l2.c:
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@ -32,6 +32,7 @@ libgstrtp_la_SOURCES = \
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gstrtph263pay.c \
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gstrtph264depay.c \
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gstrtph264pay.c \
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gstrtpjpegdepay.c \
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gstrtpjpegpay.c \
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gstrtpL16depay.c \
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gstrtpL16pay.c \
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@ -102,6 +103,7 @@ noinst_HEADERS = \
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gstrtph263pay.h \
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gstrtph264depay.h \
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gstrtph264pay.h \
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gstrtpjpegdepay.h \
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gstrtpjpegpay.h \
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gstrtpmp1sdepay.h \
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gstrtpmp2tdepay.h \
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@ -49,6 +49,7 @@
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#include "gstrtph263pay.h"
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#include "gstrtph264depay.h"
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#include "gstrtph264pay.h"
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#include "gstrtpjpegdepay.h"
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#include "gstrtpjpegpay.h"
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#include "gstrtpL16depay.h"
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#include "gstrtpL16pay.h"
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@ -159,6 +160,9 @@ plugin_init (GstPlugin * plugin)
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if (!gst_rtp_h264_pay_plugin_init (plugin))
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return FALSE;
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if (!gst_rtp_jpeg_depay_plugin_init (plugin))
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return FALSE;
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if (!gst_rtp_jpeg_pay_plugin_init (plugin))
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return FALSE;
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614
gst/rtp/gstrtpjpegdepay.c
Normal file
614
gst/rtp/gstrtpjpegdepay.c
Normal file
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@ -0,0 +1,614 @@
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/* 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 <string.h>
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#include "gstrtpjpegdepay.h"
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GST_DEBUG_CATEGORY_STATIC (rtpjpegdepay_debug);
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#define GST_CAT_DEFAULT (rtpjpegdepay_debug)
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/* elementfactory information */
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static const GstElementDetails gst_rtp_jpegdepay_details =
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GST_ELEMENT_DETAILS ("RTP JPEG depayloader",
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"Codec/Depayloader/Network",
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"Extracts JPEG video from RTP packets (RFC 2435)",
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"Wim Taymans <wim.taymans@gmail.com>");
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static GstStaticPadTemplate gst_rtp_jpeg_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 ("image/jpeg")
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);
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static GstStaticPadTemplate gst_rtp_jpeg_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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"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
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"clock-rate = (int) 90000, " "encoding-name = (string) \"JPEG\";"
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"application/x-rtp, "
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"media = (string) \"video\", "
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"payload = (int) " GST_RTP_PAYLOAD_JPEG_STRING ", "
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"clock-rate = (int) 90000")
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);
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GST_BOILERPLATE (GstRtpJPEGDepay, gst_rtp_jpeg_depay, GstBaseRTPDepayload,
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GST_TYPE_BASE_RTP_DEPAYLOAD);
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static void gst_rtp_jpeg_depay_finalize (GObject * object);
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static gboolean gst_rtp_jpeg_depay_setcaps (GstBaseRTPDepayload * depayload,
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GstCaps * caps);
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static GstBuffer *gst_rtp_jpeg_depay_process (GstBaseRTPDepayload * depayload,
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GstBuffer * buf);
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static GstStateChangeReturn gst_rtp_jpeg_depay_change_state (GstElement *
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element, GstStateChange transition);
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static void
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gst_rtp_jpeg_depay_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_jpeg_depay_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_jpeg_depay_sink_template));
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gst_element_class_set_details (element_class, &gst_rtp_jpegdepay_details);
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}
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static void
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gst_rtp_jpeg_depay_class_init (GstRtpJPEGDepayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
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gobject_class->finalize = gst_rtp_jpeg_depay_finalize;
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parent_class = g_type_class_peek_parent (klass);
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gstelement_class->change_state = gst_rtp_jpeg_depay_change_state;
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gstbasertpdepayload_class->set_caps = gst_rtp_jpeg_depay_setcaps;
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gstbasertpdepayload_class->process = gst_rtp_jpeg_depay_process;
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GST_DEBUG_CATEGORY_INIT (rtpjpegdepay_debug, "rtpjpegdepay", 0,
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"JPEG Video RTP Depayloader");
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}
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static void
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gst_rtp_jpeg_depay_init (GstRtpJPEGDepay * rtpjpegdepay,
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GstRtpJPEGDepayClass * klass)
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{
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rtpjpegdepay->adapter = gst_adapter_new ();
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}
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static void
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gst_rtp_jpeg_depay_finalize (GObject * object)
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{
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GstRtpJPEGDepay *rtpjpegdepay;
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rtpjpegdepay = GST_RTP_JPEG_DEPAY (object);
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g_object_unref (rtpjpegdepay->adapter);
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rtpjpegdepay->adapter = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/*
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* Table K.1 from JPEG spec.
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*/
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static const int jpeg_luma_quantizer[64] = {
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16, 11, 10, 16, 24, 40, 51, 61,
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12, 12, 14, 19, 26, 58, 60, 55,
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14, 13, 16, 24, 40, 57, 69, 56,
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14, 17, 22, 29, 51, 87, 80, 62,
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18, 22, 37, 56, 68, 109, 103, 77,
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24, 35, 55, 64, 81, 104, 113, 92,
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49, 64, 78, 87, 103, 121, 120, 101,
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72, 92, 95, 98, 112, 100, 103, 99
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};
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/*
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* Table K.2 from JPEG spec.
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*/
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static const int jpeg_chroma_quantizer[64] = {
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17, 18, 24, 47, 99, 99, 99, 99,
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18, 21, 26, 66, 99, 99, 99, 99,
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24, 26, 56, 99, 99, 99, 99, 99,
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47, 66, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99
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};
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/* Call MakeTables with the Q factor and a guint8[128] return array
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*/
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static void
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MakeTables (GstRtpJPEGDepay * rtpjpegdepay, gint Q, guint8 qtable[128])
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{
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gint i;
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guint factor;
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factor = CLAMP (Q, 1, 99);
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if (Q < 50)
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Q = 5000 / factor;
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else
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Q = 200 - factor * 2;
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for (i = 0; i < 64; i++) {
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gint lq = (jpeg_luma_quantizer[i] * Q + 50) / 100;
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gint cq = (jpeg_chroma_quantizer[i] * Q + 50) / 100;
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/* Limit the quantizers to 1 <= q <= 255 */
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qtable[i] = CLAMP (lq, 1, 255);
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qtable[i + 64] = CLAMP (cq, 1, 255);
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}
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}
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static const guint8 lum_dc_codelens[] = {
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0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
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};
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static const guint8 lum_dc_symbols[] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
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};
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static const guint8 lum_ac_codelens[] = {
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0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
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};
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static const guint8 lum_ac_symbols[] = {
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0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
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0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
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0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
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0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
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0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
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0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
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0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
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0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
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0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
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0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
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0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
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0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
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0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
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0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
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0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
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0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
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0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
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0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
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0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
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0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
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0xf9, 0xfa
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};
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static const guint8 chm_dc_codelens[] = {
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0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
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};
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static const guint8 chm_dc_symbols[] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
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};
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static const guint8 chm_ac_codelens[] = {
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0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
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};
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static const guint8 chm_ac_symbols[] = {
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0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
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0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
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0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
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0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
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0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
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0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
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0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
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0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
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0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
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0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
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0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
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0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
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0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
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0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
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0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
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0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
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0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
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0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
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0xf9, 0xfa
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};
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static guint8 *
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MakeQuantHeader (guint8 * p, guint8 * qt, gint size, gint tableNo)
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{
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*p++ = 0xff;
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*p++ = 0xdb; /* DQT */
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*p++ = 0; /* length msb */
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*p++ = size + 3; /* length lsb */
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*p++ = tableNo;
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memcpy (p, qt, size);
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return (p + size);
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}
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static guint8 *
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MakeHuffmanHeader (guint8 * p, const guint8 * codelens, int ncodes,
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const guint8 * symbols, int nsymbols, int tableNo, int tableClass)
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{
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*p++ = 0xff;
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*p++ = 0xc4; /* DHT */
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*p++ = 0; /* length msb */
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*p++ = 3 + ncodes + nsymbols; /* length lsb */
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*p++ = (tableClass << 4) | tableNo;
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memcpy (p, codelens, ncodes);
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p += ncodes;
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memcpy (p, symbols, nsymbols);
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p += nsymbols;
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return (p);
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}
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static guint8 *
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MakeDRIHeader (guint8 * p, guint16 dri)
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{
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*p++ = 0xff;
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*p++ = 0xdd; /* DRI */
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*p++ = 0x0; /* length msb */
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*p++ = 4; /* length lsb */
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*p++ = dri >> 8; /* dri msb */
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*p++ = dri & 0xff; /* dri lsb */
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return (p);
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}
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/*
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* Arguments:
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* type, width, height: as supplied in RTP/JPEG header
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* qt: quantization tables as either derived from
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* the Q field using MakeTables() or as specified
|
||||
* in section 4.2.
|
||||
* dri: restart interval in MCUs, or 0 if no restarts.
|
||||
*
|
||||
* p: pointer to return area
|
||||
*
|
||||
* Return value:
|
||||
* The length of the generated headers.
|
||||
*
|
||||
* Generate a frame and scan headers that can be prepended to the
|
||||
* RTP/JPEG data payload to produce a JPEG compressed image in
|
||||
* interchange format (except for possible trailing garbage and
|
||||
* absence of an EOI marker to terminate the scan).
|
||||
*/
|
||||
static guint
|
||||
MakeHeaders (guint8 * p, int type, int width, int height, guint8 * qt,
|
||||
guint precision, guint16 dri)
|
||||
{
|
||||
guint8 *start = p;
|
||||
gint size;
|
||||
|
||||
*p++ = 0xff;
|
||||
*p++ = 0xd8; /* SOI */
|
||||
|
||||
size = ((precision & 1) ? 128 : 64);
|
||||
p = MakeQuantHeader (p, qt, size, 0);
|
||||
qt += size;
|
||||
|
||||
size = ((precision & 2) ? 128 : 64);
|
||||
p = MakeQuantHeader (p, qt, size, 1);
|
||||
qt += size;
|
||||
|
||||
if (dri != 0)
|
||||
p = MakeDRIHeader (p, dri);
|
||||
|
||||
*p++ = 0xff;
|
||||
*p++ = 0xc0; /* SOF */
|
||||
*p++ = 0; /* length msb */
|
||||
*p++ = 17; /* length lsb */
|
||||
*p++ = 8; /* 8-bit precision */
|
||||
*p++ = height >> 8; /* height msb */
|
||||
*p++ = height; /* height lsb */
|
||||
*p++ = width >> 8; /* width msb */
|
||||
*p++ = width; /* width lsb */
|
||||
*p++ = 3; /* number of components */
|
||||
*p++ = 0; /* comp 0 */
|
||||
if (type == 0)
|
||||
*p++ = 0x21; /* hsamp = 2, vsamp = 1 */
|
||||
else
|
||||
*p++ = 0x22; /* hsamp = 2, vsamp = 2 */
|
||||
*p++ = 0; /* quant table 0 */
|
||||
*p++ = 1; /* comp 1 */
|
||||
*p++ = 0x11; /* hsamp = 1, vsamp = 1 */
|
||||
*p++ = 1; /* quant table 1 */
|
||||
*p++ = 2; /* comp 2 */
|
||||
*p++ = 0x11; /* hsamp = 1, vsamp = 1 */
|
||||
*p++ = 1; /* quant table 1 */
|
||||
|
||||
p = MakeHuffmanHeader (p, lum_dc_codelens,
|
||||
sizeof (lum_dc_codelens), lum_dc_symbols, sizeof (lum_dc_symbols), 0, 0);
|
||||
p = MakeHuffmanHeader (p, lum_ac_codelens,
|
||||
sizeof (lum_ac_codelens), lum_ac_symbols, sizeof (lum_ac_symbols), 0, 1);
|
||||
p = MakeHuffmanHeader (p, chm_dc_codelens,
|
||||
sizeof (chm_dc_codelens), chm_dc_symbols, sizeof (chm_dc_symbols), 1, 0);
|
||||
p = MakeHuffmanHeader (p, chm_ac_codelens,
|
||||
sizeof (chm_ac_codelens), chm_ac_symbols, sizeof (chm_ac_symbols), 1, 1);
|
||||
|
||||
*p++ = 0xff;
|
||||
*p++ = 0xda; /* SOS */
|
||||
*p++ = 0; /* length msb */
|
||||
*p++ = 12; /* length lsb */
|
||||
*p++ = 3; /* 3 components */
|
||||
*p++ = 0; /* comp 0 */
|
||||
*p++ = 0; /* huffman table 0 */
|
||||
*p++ = 1; /* comp 1 */
|
||||
*p++ = 0x11; /* huffman table 1 */
|
||||
*p++ = 2; /* comp 2 */
|
||||
*p++ = 0x11; /* huffman table 1 */
|
||||
*p++ = 0; /* first DCT coeff */
|
||||
*p++ = 63; /* last DCT coeff */
|
||||
*p++ = 0; /* sucessive approx. */
|
||||
|
||||
return (p - start);
|
||||
};
|
||||
|
||||
static gboolean
|
||||
gst_rtp_jpeg_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
|
||||
{
|
||||
GstStructure *structure;
|
||||
GstRtpJPEGDepay *rtpjpegdepay;
|
||||
GstCaps *outcaps;
|
||||
gint clock_rate;
|
||||
gboolean res;
|
||||
|
||||
rtpjpegdepay = GST_RTP_JPEG_DEPAY (depayload);
|
||||
|
||||
structure = gst_caps_get_structure (caps, 0);
|
||||
|
||||
if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
|
||||
clock_rate = 90000;
|
||||
depayload->clock_rate = clock_rate;
|
||||
|
||||
outcaps =
|
||||
gst_caps_new_simple ("image/jpeg", "framerate", GST_TYPE_FRACTION, 0, 1,
|
||||
NULL);
|
||||
res = gst_pad_set_caps (depayload->srcpad, outcaps);
|
||||
gst_caps_unref (outcaps);
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
static GstBuffer *
|
||||
gst_rtp_jpeg_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
|
||||
{
|
||||
GstRtpJPEGDepay *rtpjpegdepay;
|
||||
GstBuffer *outbuf;
|
||||
gint payload_len, header_len;
|
||||
guint8 *payload;
|
||||
guint frag_offset;
|
||||
gint Q;
|
||||
guint type, width, height;
|
||||
guint16 dri, precision, length;
|
||||
guint8 *qtable;
|
||||
|
||||
rtpjpegdepay = GST_RTP_JPEG_DEPAY (depayload);
|
||||
|
||||
if (GST_BUFFER_IS_DISCONT (buf)) {
|
||||
gst_adapter_clear (rtpjpegdepay->adapter);
|
||||
}
|
||||
|
||||
payload_len = gst_rtp_buffer_get_payload_len (buf);
|
||||
|
||||
if (payload_len < 8)
|
||||
goto empty_packet;
|
||||
|
||||
payload = gst_rtp_buffer_get_payload (buf);
|
||||
header_len = 0;
|
||||
|
||||
/* 0 1 2 3
|
||||
* 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
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type-specific | Fragment Offset |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Type | Q | Width | Height |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*/
|
||||
frag_offset = (payload[1] << 16) | (payload[2] << 8) | payload[3];
|
||||
type = payload[4];
|
||||
Q = payload[5];
|
||||
width = payload[6] * 8;
|
||||
height = payload[7] * 8;
|
||||
|
||||
GST_DEBUG_OBJECT (rtpjpegdepay, "frag %u, type %u, Q %d, width %u, height %u",
|
||||
frag_offset, type, Q, width, height);
|
||||
|
||||
header_len += 8;
|
||||
payload += 8;
|
||||
payload_len -= 8;
|
||||
|
||||
dri = 0;
|
||||
if (type > 63) {
|
||||
if (payload_len < 4)
|
||||
goto empty_packet;
|
||||
|
||||
/* 0 1 2 3
|
||||
* 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
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Restart Interval |F|L| Restart Count |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*/
|
||||
dri = (payload[0] << 8) | payload[1];
|
||||
|
||||
GST_DEBUG_OBJECT (rtpjpegdepay, "DRI %" G_GUINT16_FORMAT, dri);
|
||||
|
||||
payload += 4;
|
||||
header_len += 4;
|
||||
payload_len -= 4;
|
||||
}
|
||||
|
||||
if (Q >= 128 && frag_offset == 0) {
|
||||
if (payload_len < 4)
|
||||
goto empty_packet;
|
||||
|
||||
/* 0 1 2 3
|
||||
* 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
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | MBZ | Precision | Length |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Quantization Table Data |
|
||||
* | ... |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*/
|
||||
precision = payload[1];
|
||||
length = (payload[2] << 8) | payload[3];
|
||||
|
||||
GST_DEBUG_OBJECT (rtpjpegdepay, "precision %04x, length %" G_GUINT16_FORMAT,
|
||||
precision, length);
|
||||
|
||||
if (Q == 255 && length == 0)
|
||||
goto empty_packet;
|
||||
|
||||
payload += 4;
|
||||
header_len += 4;
|
||||
payload_len -= 4;
|
||||
|
||||
if (length > payload_len)
|
||||
goto empty_packet;
|
||||
|
||||
qtable = payload;
|
||||
|
||||
payload += length;
|
||||
header_len += length;
|
||||
payload_len -= length;
|
||||
} else {
|
||||
length = 0;
|
||||
qtable = NULL;
|
||||
precision = 0;
|
||||
}
|
||||
|
||||
if (frag_offset == 0) {
|
||||
guint size;
|
||||
|
||||
/* first packet */
|
||||
if (length == 0) {
|
||||
if (Q < 128) {
|
||||
/* no quant table, see if we have one cached */
|
||||
qtable = rtpjpegdepay->qtables[Q];
|
||||
if (!qtable) {
|
||||
GST_DEBUG_OBJECT (rtpjpegdepay, "making Q %d table", Q);
|
||||
/* make and cache the table */
|
||||
qtable = g_new (guint8, 128);
|
||||
MakeTables (rtpjpegdepay, Q, qtable);
|
||||
rtpjpegdepay->qtables[Q] = qtable;
|
||||
} else {
|
||||
GST_DEBUG_OBJECT (rtpjpegdepay, "using cached table for Q %d", Q);
|
||||
}
|
||||
/* all 8 bit quantizers */
|
||||
precision = 0;
|
||||
}
|
||||
}
|
||||
/* max header length, should be big enough */
|
||||
outbuf = gst_buffer_new_and_alloc (1000);
|
||||
size = MakeHeaders (GST_BUFFER_DATA (outbuf), type,
|
||||
width, height, qtable, precision, dri);
|
||||
|
||||
GST_DEBUG_OBJECT (rtpjpegdepay, "pushing %u bytes header", size);
|
||||
|
||||
GST_BUFFER_SIZE (outbuf) = size;
|
||||
|
||||
gst_adapter_push (rtpjpegdepay->adapter, outbuf);
|
||||
|
||||
}
|
||||
|
||||
/* take JPEG data, push in the adapter */
|
||||
GST_DEBUG_OBJECT (rtpjpegdepay, "pushing data at offset %d", header_len);
|
||||
outbuf = gst_rtp_buffer_get_payload_subbuffer (buf, header_len, -1);
|
||||
gst_adapter_push (rtpjpegdepay->adapter, outbuf);
|
||||
outbuf = NULL;
|
||||
|
||||
if (gst_rtp_buffer_get_marker (buf)) {
|
||||
guint avail;
|
||||
|
||||
/* last buffer take all data out of the adapter */
|
||||
avail = gst_adapter_available (rtpjpegdepay->adapter);
|
||||
outbuf = gst_adapter_take_buffer (rtpjpegdepay->adapter, avail);
|
||||
|
||||
GST_DEBUG_OBJECT (rtpjpegdepay, "last buffer, returning %u bytes", avail);
|
||||
}
|
||||
|
||||
return outbuf;
|
||||
|
||||
/* ERRORS */
|
||||
empty_packet:
|
||||
{
|
||||
GST_ELEMENT_WARNING (rtpjpegdepay, STREAM, DECODE,
|
||||
("Empty Payload."), (NULL));
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static GstStateChangeReturn
|
||||
gst_rtp_jpeg_depay_change_state (GstElement * element,
|
||||
GstStateChange transition)
|
||||
{
|
||||
GstRtpJPEGDepay *rtpjpegdepay;
|
||||
GstStateChangeReturn ret;
|
||||
|
||||
rtpjpegdepay = GST_RTP_JPEG_DEPAY (element);
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_NULL_TO_READY:
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_READY_TO_NULL:
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_rtp_jpeg_depay_plugin_init (GstPlugin * plugin)
|
||||
{
|
||||
return gst_element_register (plugin, "rtpjpegdepay",
|
||||
GST_RANK_MARGINAL, GST_TYPE_RTP_JPEG_DEPAY);
|
||||
}
|
||||
62
gst/rtp/gstrtpjpegdepay.h
Normal file
62
gst/rtp/gstrtpjpegdepay.h
Normal file
|
|
@ -0,0 +1,62 @@
|
|||
/* GStreamer
|
||||
* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Library General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Library General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Library General Public
|
||||
* License along with this library; if not, write to the
|
||||
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||
* Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#ifndef __GST_RTP_JPEG_DEPAY_H__
|
||||
#define __GST_RTP_JPEG_DEPAY_H__
|
||||
|
||||
#include <gst/gst.h>
|
||||
#include <gst/base/gstadapter.h>
|
||||
#include <gst/rtp/gstbasertpdepayload.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define GST_TYPE_RTP_JPEG_DEPAY \
|
||||
(gst_rtp_jpeg_depay_get_type())
|
||||
#define GST_RTP_JPEG_DEPAY(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_JPEG_DEPAY,GstRtpJPEGDepay))
|
||||
#define GST_RTP_JPEG_DEPAY_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_JPEG_DEPAY,GstRtpJPEGDepayClass))
|
||||
#define GST_IS_RTP_JPEG_DEPAY(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_JPEG_DEPAY))
|
||||
#define GST_IS_RTP_JPEG_DEPAY_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_JPEG_DEPAY))
|
||||
|
||||
typedef struct _GstRtpJPEGDepay GstRtpJPEGDepay;
|
||||
typedef struct _GstRtpJPEGDepayClass GstRtpJPEGDepayClass;
|
||||
|
||||
struct _GstRtpJPEGDepay
|
||||
{
|
||||
GstBaseRTPDepayload depayload;
|
||||
|
||||
GstAdapter *adapter;
|
||||
|
||||
/* cached quant tables */
|
||||
guint8 * qtables[255];
|
||||
};
|
||||
|
||||
struct _GstRtpJPEGDepayClass
|
||||
{
|
||||
GstBaseRTPDepayloadClass parent_class;
|
||||
};
|
||||
|
||||
gboolean gst_rtp_jpeg_depay_plugin_init (GstPlugin * plugin);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __GST_RTP_JPEG_DEPAY_H__ */
|
||||
|
|
@ -45,9 +45,9 @@
|
|||
|
||||
/* elementfactory information */
|
||||
static const GstElementDetails gst_rtp_jpeg_pay_details =
|
||||
GST_ELEMENT_DETAILS ("RTP packet payloader",
|
||||
GST_ELEMENT_DETAILS ("RTP JPEG payloader",
|
||||
"Codec/Payloader/Network",
|
||||
"Payload-encodes JPEG pictures into a RTP packet",
|
||||
"Payload-encodes JPEG pictures into RTP packets (RFC 2435)",
|
||||
"Axis Communications <dev-gstreamer@axis.com>");
|
||||
|
||||
static GstStaticPadTemplate gst_rtp_jpeg_pay_sink_template =
|
||||
|
|
@ -86,13 +86,13 @@ GST_DEBUG_CATEGORY_STATIC (rtpjpegpay_debug);
|
|||
* DEFAULT_JPEG_QUALITY:
|
||||
*
|
||||
*/
|
||||
#define DEFAULT_JPEG_QUALITY 0
|
||||
#define DEFAULT_JPEG_QUALITY 255
|
||||
|
||||
/**
|
||||
* DEFAULT_JPEG_TYPE:
|
||||
*
|
||||
*/
|
||||
#define DEFAULT_JPEG_TYPE 0
|
||||
#define DEFAULT_JPEG_TYPE 1
|
||||
|
||||
typedef enum _RtpJpegMarker RtpJpegMarker;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue