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77fe86dc4e
Original commit message from CVS: Patch by: Ville Syrjala <ville.syrjala@movial.fi> * gst/rtp/gstrtph263pay.c: * gst/rtp/gstrtph263pdepay.c: * gst/rtp/gstrtph263ppay.c: Specify H.263 variant and version in the caps (fixes #361637)
390 lines
12 KiB
C
390 lines
12 KiB
C
/* GStreamer
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* Copyright (C) <2005> Wim Taymans <wim@fluendo.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 <string.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtph263pay.h"
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#define GST_RFC2190A_HEADER_LEN 4
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typedef struct _GstRFC2190AHeader
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{
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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unsigned int ebit:3; /* End position */
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unsigned int sbit:3; /* Start position */
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unsigned int p:1; /* PB-frames mode */
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unsigned int f:1; /* flag bit */
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unsigned int r1:1; /* Reserved */
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unsigned int a:1; /* Advanced Prediction */
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unsigned int s:1; /* syntax based arithmetic coding */
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unsigned int u:1; /* Unrestricted motion vector */
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unsigned int i:1; /* Picture coding type */
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unsigned int src:3; /* Source format */
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unsigned int trb:3; /* Temporal ref for B frame */
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unsigned int dbq:2; /* Differential Quantisation parameter */
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unsigned int r2:3; /* Reserved */
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#elif G_BYTE_ORDER == G_BIG_ENDIAN
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unsigned int f:1; /* flag bit */
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unsigned int p:1; /* PB-frames mode */
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unsigned int sbit:3; /* Start position */
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unsigned int ebit:3; /* End position */
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unsigned int src:3; /* Source format */
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unsigned int i:1; /* Picture coding type */
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unsigned int u:1; /* Unrestricted motion vector */
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unsigned int s:1; /* syntax based arithmetic coding */
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unsigned int a:1; /* Advanced Prediction */
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unsigned int r1:1; /* Reserved */
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unsigned int r2:3; /* Reserved */
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unsigned int dbq:2; /* Differential Quantisation parameter */
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unsigned int trb:3; /* Temporal ref for B frame */
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#else
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#error "G_BYTE_ORDER should be big or little endian."
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#endif
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guint8 tr; /* Temporal ref for P frame */
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} GstRFC2190AHeader;
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#define GST_RFC2190A_HEADER_F(buf) (((GstRFC2190AHeader *)(buf))->f)
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#define GST_RFC2190A_HEADER_P(buf) (((GstRFC2190AHeader *)(buf))->p)
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#define GST_RFC2190A_HEADER_SBIT(buf) (((GstRFC2190AHeader *)(buf))->sbit)
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#define GST_RFC2190A_HEADER_EBIT(buf) (((GstRFC2190AHeader *)(buf))->ebit)
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#define GST_RFC2190A_HEADER_SRC(buf) (((GstRFC2190AHeader *)(buf))->src)
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#define GST_RFC2190A_HEADER_I(buf) (((GstRFC2190AHeader *)(buf))->i)
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#define GST_RFC2190A_HEADER_U(buf) (((GstRFC2190AHeader *)(buf))->u)
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#define GST_RFC2190A_HEADER_S(buf) (((GstRFC2190AHeader *)(buf))->s)
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#define GST_RFC2190A_HEADER_A(buf) (((GstRFC2190AHeader *)(buf))->a)
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#define GST_RFC2190A_HEADER_R1(buf) (((GstRFC2190AHeader *)(buf))->r1)
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#define GST_RFC2190A_HEADER_R2(buf) (((GstRFC2190AHeader *)(buf))->r2)
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#define GST_RFC2190A_HEADER_DBQ(buf) (((GstRFC2190AHeader *)(buf))->dbq)
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#define GST_RFC2190A_HEADER_TRB(buf) (((GstRFC2190AHeader *)(buf))->trb)
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#define GST_RFC2190A_HEADER_TR(buf) (((GstRFC2190AHeader *)(buf))->tr)
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typedef struct _GstH263PictureLayer
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{
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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unsigned int psc1:16;
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unsigned int tr1:2;
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unsigned int psc2:6;
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unsigned int ptype_263:1;
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unsigned int ptype_start:1;
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unsigned int tr2:6;
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unsigned int ptype_umvmode:1;
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unsigned int ptype_pictype:1;
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unsigned int ptype_srcformat:3;
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unsigned int ptype_freeze:1;
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unsigned int ptype_camera:1;
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unsigned int ptype_split:1;
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unsigned int chaff:5;
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unsigned int ptype_pbmode:1;
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unsigned int ptype_apmode:1;
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unsigned int ptype_sacmode:1;
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#elif G_BYTE_ORDER == G_BIG_ENDIAN
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unsigned int psc1:16;
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unsigned int psc2:6;
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unsigned int tr1:2;
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unsigned int tr2:6;
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unsigned int ptype_start:1;
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unsigned int ptype_263:1;
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unsigned int ptype_split:1;
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unsigned int ptype_camera:1;
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unsigned int ptype_freeze:1;
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unsigned int ptype_srcformat:3;
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unsigned int ptype_pictype:1;
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unsigned int ptype_umvmode:1;
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unsigned int ptype_sacmode:1;
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unsigned int ptype_apmode:1;
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unsigned int ptype_pbmode:1;
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unsigned int chaff:5;
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#else
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#error "G_BYTE_ORDER should be big or little endian."
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#endif
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} GstH263PictureLayer;
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#define GST_H263_PICTURELAYER_PLSRC(buf) (((GstH263PictureLayer *)(buf))->ptype_srcformat)
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#define GST_H263_PICTURELAYER_PLTYPE(buf) (((GstH263PictureLayer *)(buf))->ptype_pictype)
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#define GST_H263_PICTURELAYER_PLUMV(buf) (((GstH263PictureLayer *)(buf))->ptype_umvmode)
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#define GST_H263_PICTURELAYER_PLSAC(buf) (((GstH263PictureLayer *)(buf))->ptype_sacmode)
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#define GST_H263_PICTURELAYER_PLAP(buf) (((GstH263PictureLayer *)(buf))->ptype_apmode)
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/* elementfactory information */
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static const GstElementDetails gst_rtp_h263pay_details =
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GST_ELEMENT_DETAILS ("RTP packet payloader",
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"Codec/Payloader/Network",
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"Payload-encodes H263 video in RTP packets (RFC 2190)",
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"Neil Stratford <neils@vipadia.com>");
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static GstStaticPadTemplate gst_rtp_h263_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-h263, "
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"variant = (string) \"itu\", " "h263version = (string) \"h263\"")
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);
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static GstStaticPadTemplate gst_rtp_h263_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_H263_STRING ", "
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"clock-rate = (int) 90000, " "encoding-name = (string) \"H263\"; "
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"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) \"H263\"")
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);
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static void gst_rtp_h263_pay_class_init (GstRtpH263PayClass * klass);
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static void gst_rtp_h263_pay_base_init (GstRtpH263PayClass * klass);
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static void gst_rtp_h263_pay_init (GstRtpH263Pay * rtph263pay);
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static void gst_rtp_h263_pay_finalize (GObject * object);
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static gboolean gst_rtp_h263_pay_setcaps (GstBaseRTPPayload * payload,
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GstCaps * caps);
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static GstFlowReturn gst_rtp_h263_pay_handle_buffer (GstBaseRTPPayload *
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payload, GstBuffer * buffer);
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static GstBaseRTPPayloadClass *parent_class = NULL;
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static GType
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gst_rtp_h263_pay_get_type (void)
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{
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static GType rtph263pay_type = 0;
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if (!rtph263pay_type) {
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static const GTypeInfo rtph263pay_info = {
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sizeof (GstRtpH263PayClass),
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(GBaseInitFunc) gst_rtp_h263_pay_base_init,
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NULL,
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(GClassInitFunc) gst_rtp_h263_pay_class_init,
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NULL,
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NULL,
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sizeof (GstRtpH263Pay),
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0,
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(GInstanceInitFunc) gst_rtp_h263_pay_init,
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};
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rtph263pay_type =
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g_type_register_static (GST_TYPE_BASE_RTP_PAYLOAD, "GstRtpH263Pay",
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&rtph263pay_info, 0);
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}
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return rtph263pay_type;
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}
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static void
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gst_rtp_h263_pay_base_init (GstRtpH263PayClass * 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_h263_pay_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_h263_pay_sink_template));
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gst_element_class_set_details (element_class, &gst_rtp_h263pay_details);
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}
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static void
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gst_rtp_h263_pay_class_init (GstRtpH263PayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseRTPPayloadClass *gstbasertppayload_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->finalize = gst_rtp_h263_pay_finalize;
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gstbasertppayload_class->set_caps = gst_rtp_h263_pay_setcaps;
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gstbasertppayload_class->handle_buffer = gst_rtp_h263_pay_handle_buffer;
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}
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static void
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gst_rtp_h263_pay_init (GstRtpH263Pay * rtph263pay)
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{
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rtph263pay->adapter = gst_adapter_new ();
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}
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static void
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gst_rtp_h263_pay_finalize (GObject * object)
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{
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GstRtpH263Pay *rtph263pay;
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rtph263pay = GST_RTP_H263_PAY (object);
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g_object_unref (rtph263pay->adapter);
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rtph263pay->adapter = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gboolean
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gst_rtp_h263_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
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{
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payload->pt = GST_RTP_PAYLOAD_H263;
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gst_basertppayload_set_options (payload, "video", TRUE, "H263", 90000);
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gst_basertppayload_set_outcaps (payload, NULL);
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return TRUE;
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}
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static guint
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gst_rtp_h263_pay_gobfiner (guint8 * data, guint len, guint curpos)
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{
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guint16 test = 0xffff;
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guint i;
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/* If we are past the end, stop */
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if (curpos >= len)
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return 0;
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/* start at curpos and loop looking for next gob start */
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for (i = curpos; i < len; i++) {
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test = (test << 8) | data[i];
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if ((test == 0) && (i > curpos + 4)) {
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return i - 3;
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}
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}
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return len;
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}
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static GstFlowReturn
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gst_rtp_h263_pay_flush (GstRtpH263Pay * rtph263pay)
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{
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guint avail;
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GstBuffer *outbuf;
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GstFlowReturn ret = 0;
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gboolean fragmented;
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guint8 *data, *header;
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GstH263PictureLayer *piclayer;
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guint8 *payload;
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guint payload_len, total_len;
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guint curpos, nextgobpos;
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avail = gst_adapter_available (rtph263pay->adapter);
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if (avail == 0)
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return GST_FLOW_OK;
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fragmented = FALSE;
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/* Get a pointer to all the data for the frame */
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data = (guint8 *) gst_adapter_peek (rtph263pay->adapter, avail);
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/* Start at the begining and loop looking for gobs */
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curpos = 0;
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/* Picture header */
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piclayer = (GstH263PictureLayer *) data;
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while ((nextgobpos = gst_rtp_h263_pay_gobfiner (data, avail, curpos)) > 0) {
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payload_len = nextgobpos - curpos;
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total_len = payload_len + GST_RFC2190A_HEADER_LEN;
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outbuf = gst_rtp_buffer_new_allocate (total_len, 0, 0);
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header = gst_rtp_buffer_get_payload (outbuf);
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payload = header + GST_RFC2190A_HEADER_LEN;
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/* Build the headers */
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GST_RFC2190A_HEADER_F (header) = 0;
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GST_RFC2190A_HEADER_P (header) = 0;
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GST_RFC2190A_HEADER_SBIT (header) = 0;
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GST_RFC2190A_HEADER_EBIT (header) = 0;
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GST_RFC2190A_HEADER_SRC (header) = GST_H263_PICTURELAYER_PLSRC (piclayer);
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GST_RFC2190A_HEADER_I (header) = GST_H263_PICTURELAYER_PLTYPE (piclayer);
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GST_RFC2190A_HEADER_U (header) = GST_H263_PICTURELAYER_PLUMV (piclayer);
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GST_RFC2190A_HEADER_S (header) = GST_H263_PICTURELAYER_PLSAC (piclayer);
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GST_RFC2190A_HEADER_A (header) = GST_H263_PICTURELAYER_PLAP (piclayer);
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GST_RFC2190A_HEADER_R1 (header) = 0;
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GST_RFC2190A_HEADER_R2 (header) = 0;
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GST_RFC2190A_HEADER_DBQ (header) = 0;
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GST_RFC2190A_HEADER_TRB (header) = 0;
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GST_RFC2190A_HEADER_TR (header) = 0;
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/* last fragment gets the marker bit set */
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gst_rtp_buffer_set_marker (outbuf, nextgobpos < avail ? 0 : 1);
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memcpy (payload, data + curpos, payload_len);
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GST_BUFFER_TIMESTAMP (outbuf) = rtph263pay->first_ts;
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ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtph263pay), outbuf);
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curpos = nextgobpos;
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}
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/* Flush the whole packet */
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gst_adapter_flush (rtph263pay->adapter, avail);
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return ret;
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}
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static GstFlowReturn
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gst_rtp_h263_pay_handle_buffer (GstBaseRTPPayload * payload, GstBuffer * buffer)
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{
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GstRtpH263Pay *rtph263pay;
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GstFlowReturn ret;
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guint size;
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rtph263pay = GST_RTP_H263_PAY (payload);
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size = GST_BUFFER_SIZE (buffer);
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rtph263pay->first_ts = GST_BUFFER_TIMESTAMP (buffer);
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/* we always encode and flush a full picture */
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gst_adapter_push (rtph263pay->adapter, buffer);
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ret = gst_rtp_h263_pay_flush (rtph263pay);
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return ret;
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}
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gboolean
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gst_rtp_h263_pay_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtph263pay",
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GST_RANK_NONE, GST_TYPE_RTP_H263_PAY);
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}
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