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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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3235 lines
105 KiB
C
3235 lines
105 KiB
C
/*
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* This library is licensed under 2 different licenses and you
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* can choose to use it under the terms of either one of them. The
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* two licenses are the MPL 1.1 and the LGPL.
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*
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* MPL:
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/.
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* LGPL:
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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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* The Original Code is Fluendo MPEG Demuxer plugin.
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*
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* The Initial Developer of the Original Code is Fluendo, S.A.
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* Portions created by Fluendo, S.L. are Copyright (C) 2005,2006,2007,2008,2009
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* Fluendo, S.A. All Rights Reserved.
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*
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* Contributor(s): Wim Taymans <wim@fluendo.com>
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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 <stdlib.h>
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#include <liboil/liboil.h>
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#include "gstmpegdefs.h"
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#include "gstmpegtsdemux.h"
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#include "flutspatinfo.h"
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#include "flutspmtinfo.h"
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GST_DEBUG_CATEGORY_STATIC (gstmpegtsdemux_debug);
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#define GST_CAT_DEFAULT (gstmpegtsdemux_debug)
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/* elementfactory information */
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#ifndef __always_inline
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#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
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#define __always_inline inline __attribute__((always_inline))
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#else
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#define __always_inline inline
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#endif
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#endif
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#ifndef DISABLE_INLINE
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#define FORCE_INLINE __always_inline
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#else
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#define FORCE_INLINE
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#endif
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static GstElementDetails mpegts_demux_details = {
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"The Fluendo MPEG Transport stream demuxer",
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"Codec/Demuxer",
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"Demultiplexes MPEG2 Transport Streams",
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"Wim Taymans <wim@fluendo.com>"
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};
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/* MPEG2Demux signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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#define DEFAULT_PROP_ES_PIDS ""
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#define DEFAULT_PROP_CHECK_CRC TRUE
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#define DEFAULT_PROP_PROGRAM_NUMBER -1
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/* latency in mseconds */
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#define TS_LATENCY 700
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enum
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{
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PROP_0,
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PROP_ES_PIDS,
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PROP_CHECK_CRC,
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PROP_PROGRAM_NUMBER,
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PROP_PAT_INFO,
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PROP_PMT_INFO,
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};
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#define GSTTIME_TO_BYTES(time) \
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((time != -1) ? gst_util_uint64_scale (MAX(0,(gint64) ((time))), \
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demux->bitrate, GST_SECOND) : -1)
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#define BYTES_TO_GSTTIME(bytes) \
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((bytes != -1) ? (gst_util_uint64_scale (bytes, GST_SECOND, \
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demux->bitrate)) : -1)
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#define VIDEO_CAPS \
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GST_STATIC_CAPS (\
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"video/mpeg, " \
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"mpegversion = (int) { 1, 2, 4 }, " \
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"systemstream = (boolean) FALSE; " \
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"video/x-h264;" \
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"video/x-dirac;" \
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"video/x-wmv," \
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"wmvversion = (int) 3, " \
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"format = (fourcc) WVC1" \
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)
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#define AUDIO_CAPS \
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GST_STATIC_CAPS ( \
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"audio/mpeg, " \
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"mpegversion = (int) { 1, 4 };" \
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"audio/x-lpcm, " \
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"width = (int) { 16, 20, 24 }, " \
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"rate = (int) { 48000, 96000 }, " \
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"channels = (int) [ 1, 8 ], " \
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"dynamic_range = (int) [ 0, 255 ], " \
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"emphasis = (boolean) { FALSE, TRUE }, " \
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"mute = (boolean) { FALSE, TRUE }; " \
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"audio/x-ac3; audio/x-eac3;" \
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"audio/x-dts;" \
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"audio/x-private-ts-lpcm" \
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)
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/* Can also use the subpicture pads for text subtitles? */
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#define SUBPICTURE_CAPS \
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GST_STATIC_CAPS ("subpicture/x-pgs; video/x-dvd-subpicture")
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static GstStaticPadTemplate sink_template = 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/mpegts")
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);
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static GstStaticPadTemplate video_template =
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GST_STATIC_PAD_TEMPLATE ("video_%04x",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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VIDEO_CAPS);
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static GstStaticPadTemplate audio_template =
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GST_STATIC_PAD_TEMPLATE ("audio_%04x",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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AUDIO_CAPS);
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static GstStaticPadTemplate subpicture_template =
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GST_STATIC_PAD_TEMPLATE ("subpicture_%04x",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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SUBPICTURE_CAPS);
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static GstStaticPadTemplate private_template =
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GST_STATIC_PAD_TEMPLATE ("private_%04x",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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GST_STATIC_CAPS_ANY);
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static void gst_mpegts_demux_base_init (GstMpegTSDemuxClass * klass);
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static void gst_mpegts_demux_class_init (GstMpegTSDemuxClass * klass);
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static void gst_mpegts_demux_init (GstMpegTSDemux * demux);
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static void gst_mpegts_demux_finalize (GstMpegTSDemux * demux);
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static void gst_mpegts_demux_reset (GstMpegTSDemux * demux);
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//static void gst_mpegts_demux_remove_pads (GstMpegTSDemux * demux);
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static void gst_mpegts_demux_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_mpegts_demux_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_mpegts_demux_is_PMT (GstMpegTSDemux * demux, guint16 PID);
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static gboolean gst_mpegts_demux_sink_event (GstPad * pad, GstEvent * event);
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static gboolean gst_mpegts_demux_src_event (GstPad * pad, GstEvent * event);
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static GstFlowReturn gst_mpegts_demux_chain (GstPad * pad, GstBuffer * buffer);
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static gboolean gst_mpegts_demux_sink_setcaps (GstPad * pad, GstCaps * caps);
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static GstClock *gst_mpegts_demux_provide_clock (GstElement * element);
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static gboolean gst_mpegts_demux_src_pad_query (GstPad * pad, GstQuery * query);
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static const GstQueryType *gst_mpegts_demux_src_pad_query_type (GstPad * pad);
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static GstStateChangeReturn gst_mpegts_demux_change_state (GstElement * element,
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GstStateChange transition);
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static MpegTsPmtInfo *mpegts_demux_build_pmt_info (GstMpegTSDemux * demux,
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guint16 pmt_pid);
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static GstElementClass *parent_class = NULL;
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/*static guint gst_mpegts_demux_signals[LAST_SIGNAL] = { 0 };*/
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GType
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gst_mpegts_demux_get_type (void)
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{
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static GType mpegts_demux_type = 0;
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if (G_UNLIKELY (!mpegts_demux_type)) {
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static const GTypeInfo mpegts_demux_info = {
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sizeof (GstMpegTSDemuxClass),
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(GBaseInitFunc) gst_mpegts_demux_base_init,
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NULL,
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(GClassInitFunc) gst_mpegts_demux_class_init,
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NULL,
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NULL,
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sizeof (GstMpegTSDemux),
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0,
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(GInstanceInitFunc) gst_mpegts_demux_init,
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};
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mpegts_demux_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstMpegTSDemux",
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&mpegts_demux_info, 0);
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GST_DEBUG_CATEGORY_INIT (gstmpegtsdemux_debug, "mpegtsdemux", 0,
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"MPEG program stream demultiplexer element");
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}
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return mpegts_demux_type;
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}
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static void
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gst_mpegts_demux_base_init (GstMpegTSDemuxClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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klass->sink_template = gst_static_pad_template_get (&sink_template);
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klass->video_template = gst_static_pad_template_get (&video_template);
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klass->audio_template = gst_static_pad_template_get (&audio_template);
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klass->subpicture_template =
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gst_static_pad_template_get (&subpicture_template);
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klass->private_template = gst_static_pad_template_get (&private_template);
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gst_element_class_add_pad_template (element_class, klass->video_template);
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gst_element_class_add_pad_template (element_class, klass->audio_template);
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gst_element_class_add_pad_template (element_class,
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klass->subpicture_template);
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gst_element_class_add_pad_template (element_class, klass->private_template);
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gst_element_class_add_pad_template (element_class, klass->sink_template);
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gst_element_class_set_details (element_class, &mpegts_demux_details);
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}
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static void
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gst_mpegts_demux_class_init (GstMpegTSDemuxClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gobject_class->finalize = (GObjectFinalizeFunc) gst_mpegts_demux_finalize;
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gobject_class->set_property = gst_mpegts_demux_set_property;
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gobject_class->get_property = gst_mpegts_demux_get_property;
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g_object_class_install_property (gobject_class, PROP_ES_PIDS,
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g_param_spec_string ("es-pids",
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"Colon separated list of PIDs containing Elementary Streams",
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"PIDs to treat as Elementary Streams in the absence of a PMT, "
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"eg 0x10:0x11:0x20", DEFAULT_PROP_ES_PIDS, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_CHECK_CRC,
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g_param_spec_boolean ("check-crc", "Check CRC",
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"Enable CRC checking", DEFAULT_PROP_CHECK_CRC, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_PROGRAM_NUMBER,
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g_param_spec_int ("program-number", "Program Number",
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"Program number to demux for (-1 to ignore)", -1, G_MAXINT,
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DEFAULT_PROP_PROGRAM_NUMBER, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_PAT_INFO,
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g_param_spec_value_array ("pat-info",
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"GValueArray containing GObjects with properties",
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"Array of GObjects containing information from the TS PAT "
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"about all programs listed in the current Program Association "
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"Table (PAT)",
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g_param_spec_object ("flu-pat-streaminfo", "FluPATStreamInfo",
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"Fluendo TS Demuxer PAT Stream info object",
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MPEGTS_TYPE_PAT_INFO, G_PARAM_READABLE), G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, PROP_PMT_INFO,
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g_param_spec_object ("pmt-info",
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"Information about the current program",
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"GObject with properties containing information from the TS PMT "
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"about the currently selected program and its streams",
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MPEGTS_TYPE_PMT_INFO, G_PARAM_READABLE));
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gstelement_class->change_state = gst_mpegts_demux_change_state;
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gstelement_class->provide_clock = gst_mpegts_demux_provide_clock;
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}
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static void
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gst_mpegts_demux_init (GstMpegTSDemux * demux)
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{
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GstMpegTSDemuxClass *klass = GST_MPEGTS_DEMUX_GET_CLASS (demux);
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demux->streams =
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g_malloc0 (sizeof (GstMpegTSStream *) * (MPEGTS_MAX_PID + 1));
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demux->sinkpad = gst_pad_new_from_template (klass->sink_template, "sink");
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gst_pad_set_chain_function (demux->sinkpad, gst_mpegts_demux_chain);
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gst_pad_set_event_function (demux->sinkpad, gst_mpegts_demux_sink_event);
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gst_pad_set_setcaps_function (demux->sinkpad, gst_mpegts_demux_sink_setcaps);
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gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
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demux->elementary_pids = NULL;
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demux->nb_elementary_pids = 0;
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demux->check_crc = DEFAULT_PROP_CHECK_CRC;
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demux->program_number = DEFAULT_PROP_PROGRAM_NUMBER;
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demux->sync_lut = NULL;
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demux->sync_lut_len = 0;
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demux->bitrate = -1;
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demux->num_packets = 0;
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demux->pcr[0] = -1;
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demux->pcr[1] = -1;
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demux->cache_duration = GST_CLOCK_TIME_NONE;
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demux->base_pts = GST_CLOCK_TIME_NONE;
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oil_init ();
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}
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static void
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gst_mpegts_demux_finalize (GstMpegTSDemux * demux)
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{
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gst_mpegts_demux_reset (demux);
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g_free (demux->streams);
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G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (demux));
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}
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static void
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gst_mpegts_demux_reset (GstMpegTSDemux * demux)
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{
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/* Clean up the streams and pads we allocated */
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gint i;
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for (i = 0; i < MPEGTS_MAX_PID + 1; i++) {
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GstMpegTSStream *stream = demux->streams[i];
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if (stream != NULL) {
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if (stream->pad)
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gst_element_remove_pad (GST_ELEMENT_CAST (demux), stream->pad);
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if (stream->ES_info)
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gst_mpeg_descriptor_free (stream->ES_info);
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if (stream->PMT.entries)
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g_array_free (stream->PMT.entries, TRUE);
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if (stream->PMT.program_info)
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gst_mpeg_descriptor_free (stream->PMT.program_info);
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if (stream->PAT.entries)
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g_array_free (stream->PAT.entries, TRUE);
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switch (stream->PID_type) {
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case PID_TYPE_ELEMENTARY:
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gst_pes_filter_uninit (&stream->filter);
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break;
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case PID_TYPE_PROGRAM_ASSOCIATION:
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case PID_TYPE_CONDITIONAL_ACCESS:
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case PID_TYPE_PROGRAM_MAP:
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gst_section_filter_uninit (&stream->section_filter);
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break;
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}
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if (stream->pes_buffer) {
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gst_buffer_unref (stream->pes_buffer);
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stream->pes_buffer = NULL;
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}
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g_free (stream);
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demux->streams[i] = NULL;
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}
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}
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if (demux->clock) {
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g_object_unref (demux->clock);
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demux->clock = NULL;
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}
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}
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#if 0
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static void
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gst_mpegts_demux_remove_pads (GstMpegTSDemux * demux)
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{
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/* remove pads we added in preparation for adding new ones */
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/* FIXME: instead of walking all streams, we should retain a list only
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* of streams that have added pads */
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gint i;
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if (demux->need_no_more_pads) {
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gst_element_no_more_pads ((GstElement *) demux);
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demux->need_no_more_pads = FALSE;
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}
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for (i = 0; i < MPEGTS_MAX_PID + 1; i++) {
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GstMpegTSStream *stream = demux->streams[i];
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if (stream != NULL) {
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if (GST_IS_PAD (stream->pad)) {
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gst_pad_push_event (stream->pad, gst_event_new_eos ());
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gst_element_remove_pad (GST_ELEMENT_CAST (demux), stream->pad);
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}
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stream->pad = NULL;
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if (stream->PID_type == PID_TYPE_ELEMENTARY)
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gst_pes_filter_drain (&stream->filter);
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}
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}
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}
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#endif
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static guint32 crc_tab[256] = {
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0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
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0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
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0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
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0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
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0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
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0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
|
|
0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
|
|
0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
|
|
0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
|
|
0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
|
|
0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
|
|
0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
|
|
0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
|
|
0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
|
|
0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
|
|
0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
|
|
0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
|
|
0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
|
|
0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
|
|
0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
|
|
0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
|
|
0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
|
|
0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
|
|
0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
|
|
0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
|
|
0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
|
|
0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
|
|
0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
|
|
0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
|
|
0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
|
|
0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
|
|
0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
|
|
0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
|
|
0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
|
|
0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
|
|
0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
|
|
0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
|
|
0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
|
|
0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
|
|
0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
|
|
0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
|
|
0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
|
|
0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
|
|
};
|
|
|
|
/*This function fills the value of negotiated packetsize at sinkpad*/
|
|
static gboolean
|
|
gst_mpegts_demux_sink_setcaps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (gst_pad_get_parent (pad));
|
|
GstStructure *structure = NULL;
|
|
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
|
|
GST_DEBUG_OBJECT (demux, "setcaps called with %" GST_PTR_FORMAT, caps);
|
|
|
|
if (!gst_structure_get_int (structure, "packetsize", &demux->packetsize)) {
|
|
GST_DEBUG_OBJECT (demux, "packetsize parameter not found in sink caps");
|
|
}
|
|
|
|
gst_object_unref (demux);
|
|
return TRUE;
|
|
}
|
|
|
|
static FORCE_INLINE guint32
|
|
gst_mpegts_demux_calc_crc32 (guint8 * data, guint datalen)
|
|
{
|
|
gint i;
|
|
guint32 crc = 0xffffffff;
|
|
|
|
for (i = 0; i < datalen; i++) {
|
|
crc = (crc << 8) ^ crc_tab[((crc >> 24) ^ *data++) & 0xff];
|
|
}
|
|
return crc;
|
|
}
|
|
|
|
static FORCE_INLINE gboolean
|
|
gst_mpegts_is_dirac_stream (GstMpegTSStream * stream)
|
|
{
|
|
gboolean is_dirac = FALSE;
|
|
|
|
if (stream->stream_type != ST_VIDEO_DIRAC)
|
|
return FALSE;
|
|
|
|
if (stream->ES_info != NULL) {
|
|
guint8 *dirac_desc;
|
|
|
|
/* Check for a Registration Descriptor to confirm this is dirac */
|
|
dirac_desc = gst_mpeg_descriptor_find (stream->ES_info, DESC_REGISTRATION);
|
|
if (dirac_desc != NULL && DESC_LENGTH (dirac_desc) >= 4) {
|
|
if (DESC_REGISTRATION_format_identifier (dirac_desc) == 0x64726163) { /* 'drac' in hex */
|
|
is_dirac = TRUE;
|
|
}
|
|
} else {
|
|
/* Check for old mapping as originally specified too */
|
|
dirac_desc = gst_mpeg_descriptor_find (stream->ES_info,
|
|
DESC_DIRAC_TC_PRIVATE);
|
|
if (dirac_desc != NULL && DESC_LENGTH (dirac_desc) == 0)
|
|
is_dirac = TRUE;
|
|
}
|
|
}
|
|
|
|
return is_dirac;
|
|
}
|
|
|
|
static FORCE_INLINE gboolean
|
|
gst_mpegts_stream_is_video (GstMpegTSStream * stream)
|
|
{
|
|
switch (stream->stream_type) {
|
|
case ST_VIDEO_MPEG1:
|
|
case ST_VIDEO_MPEG2:
|
|
case ST_VIDEO_MPEG4:
|
|
case ST_VIDEO_H264:
|
|
return TRUE;
|
|
case ST_VIDEO_DIRAC:
|
|
return gst_mpegts_is_dirac_stream (stream);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_is_reserved_PID (GstMpegTSDemux * demux, guint16 PID)
|
|
{
|
|
return (PID >= PID_RESERVED_FIRST) && (PID < PID_RESERVED_LAST);
|
|
}
|
|
|
|
/* This function assumes that provided PID never will be greater than
|
|
* MPEGTS_MAX_PID (13 bits), this is currently guaranteed as everywhere in
|
|
* the code recovered PID at maximum is 13 bits long.
|
|
*/
|
|
static FORCE_INLINE GstMpegTSStream *
|
|
gst_mpegts_demux_get_stream_for_PID (GstMpegTSDemux * demux, guint16 PID)
|
|
{
|
|
GstMpegTSStream *stream = NULL;
|
|
|
|
stream = demux->streams[PID];
|
|
|
|
if (G_UNLIKELY (stream == NULL)) {
|
|
stream = g_new0 (GstMpegTSStream, 1);
|
|
|
|
stream->demux = demux;
|
|
stream->PID = PID;
|
|
stream->pad = NULL;
|
|
stream->base_PCR = -1;
|
|
stream->last_PCR = -1;
|
|
stream->last_PCR_difference = -1;
|
|
stream->PMT.version_number = -1;
|
|
stream->PAT.version_number = -1;
|
|
stream->PMT_pid = MPEGTS_MAX_PID + 1;
|
|
stream->flags |= MPEGTS_STREAM_FLAG_STREAM_TYPE_UNKNOWN;
|
|
stream->pes_buffer_in_sync = FALSE;
|
|
switch (PID) {
|
|
/* check for fixed mapping */
|
|
case PID_PROGRAM_ASSOCIATION_TABLE:
|
|
stream->PID_type = PID_TYPE_PROGRAM_ASSOCIATION;
|
|
/* initialise section filter */
|
|
gst_section_filter_init (&stream->section_filter);
|
|
break;
|
|
case PID_CONDITIONAL_ACCESS_TABLE:
|
|
stream->PID_type = PID_TYPE_CONDITIONAL_ACCESS;
|
|
/* initialise section filter */
|
|
gst_section_filter_init (&stream->section_filter);
|
|
break;
|
|
case PID_NULL_PACKET:
|
|
stream->PID_type = PID_TYPE_NULL_PACKET;
|
|
break;
|
|
default:
|
|
/* mark reserved PIDs */
|
|
if (gst_mpegts_demux_is_reserved_PID (demux, PID)) {
|
|
stream->PID_type = PID_TYPE_RESERVED;
|
|
} else {
|
|
/* check if PMT found in PAT */
|
|
if (gst_mpegts_demux_is_PMT (demux, PID)) {
|
|
stream->PID_type = PID_TYPE_PROGRAM_MAP;
|
|
/* initialise section filter */
|
|
gst_section_filter_init (&stream->section_filter);
|
|
} else
|
|
stream->PID_type = PID_TYPE_UNKNOWN;
|
|
}
|
|
break;
|
|
}
|
|
GST_DEBUG_OBJECT (demux, "creating stream %p for PID 0x%04x, PID_type %d",
|
|
stream, PID, stream->PID_type);
|
|
|
|
demux->streams[PID] = stream;
|
|
}
|
|
|
|
return stream;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_fill_stream (GstMpegTSStream * stream, guint8 id,
|
|
guint8 stream_type)
|
|
{
|
|
GstPadTemplate *template;
|
|
gchar *name;
|
|
GstMpegTSDemuxClass *klass;
|
|
GstMpegTSDemux *demux;
|
|
GstCaps *caps;
|
|
|
|
if (stream->stream_type && stream->stream_type != stream_type)
|
|
goto wrong_type;
|
|
|
|
demux = stream->demux;
|
|
klass = GST_MPEGTS_DEMUX_GET_CLASS (demux);
|
|
|
|
name = NULL;
|
|
template = NULL;
|
|
caps = NULL;
|
|
|
|
switch (stream_type) {
|
|
case ST_VIDEO_MPEG1:
|
|
case ST_VIDEO_MPEG2:
|
|
template = klass->video_template;
|
|
name = g_strdup_printf ("video_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("video/mpeg",
|
|
"mpegversion", G_TYPE_INT, stream_type == ST_VIDEO_MPEG1 ? 1 : 2,
|
|
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
|
|
break;
|
|
case ST_AUDIO_MPEG1:
|
|
case ST_AUDIO_MPEG2:
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/mpeg",
|
|
"mpegversion", G_TYPE_INT, 1, NULL);
|
|
break;
|
|
case ST_PRIVATE_DATA:
|
|
/* check if there is an AC3 descriptor associated with this stream
|
|
* from the PMT */
|
|
if (gst_mpeg_descriptor_find (stream->ES_info, DESC_DVB_AC3)) {
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/x-ac3", NULL);
|
|
} else if (gst_mpeg_descriptor_find (stream->ES_info, DESC_DVB_TELETEXT)) {
|
|
template = klass->private_template;
|
|
name = g_strdup_printf ("private_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("private/teletext", NULL);
|
|
} else if (gst_mpeg_descriptor_find (stream->ES_info,
|
|
DESC_DVB_SUBTITLING)) {
|
|
template = klass->private_template;
|
|
name = g_strdup_printf ("private_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("private/x-dvbsub", NULL);
|
|
}
|
|
break;
|
|
case ST_HDV_AUX_V:
|
|
template = klass->private_template;
|
|
name = g_strdup_printf ("private_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("hdv/aux-v", NULL);
|
|
break;
|
|
case ST_HDV_AUX_A:
|
|
template = klass->private_template;
|
|
name = g_strdup_printf ("private_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("hdv/aux-a", NULL);
|
|
break;
|
|
case ST_PRIVATE_SECTIONS:
|
|
case ST_MHEG:
|
|
case ST_DSMCC:
|
|
break;
|
|
case ST_AUDIO_AAC:
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/mpeg",
|
|
"mpegversion", G_TYPE_INT, 4, NULL);
|
|
break;
|
|
case ST_VIDEO_MPEG4:
|
|
template = klass->video_template;
|
|
name = g_strdup_printf ("video_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("video/mpeg",
|
|
"mpegversion", G_TYPE_INT, 4,
|
|
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
|
|
break;
|
|
case ST_VIDEO_H264:
|
|
template = klass->video_template;
|
|
name = g_strdup_printf ("video_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("video/x-h264", NULL);
|
|
break;
|
|
case ST_VIDEO_DIRAC:
|
|
if (gst_mpegts_is_dirac_stream (stream)) {
|
|
template = klass->video_template;
|
|
name = g_strdup_printf ("video_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("video/x-dirac", NULL);
|
|
}
|
|
break;
|
|
case ST_PRIVATE_EA: /* Try to detect a VC1 stream */
|
|
{
|
|
guint8 *desc = NULL;
|
|
|
|
if (stream->ES_info)
|
|
desc = gst_mpeg_descriptor_find (stream->ES_info, DESC_REGISTRATION);
|
|
if (!(desc && DESC_REGISTRATION_format_identifier (desc) == DRF_ID_VC1)) {
|
|
GST_WARNING ("0xea private stream type found but no descriptor "
|
|
"for VC1. Assuming plain VC1.");
|
|
}
|
|
template = klass->video_template;
|
|
name = g_strdup_printf ("video_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("video/x-wmv",
|
|
"wmvversion", G_TYPE_INT, 3,
|
|
"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('W', 'V', 'C', '1'),
|
|
NULL);
|
|
break;
|
|
}
|
|
case ST_BD_AUDIO_AC3:
|
|
{
|
|
GstMpegTSStream *PMT_stream =
|
|
gst_mpegts_demux_get_stream_for_PID (stream->demux, stream->PMT_pid);
|
|
GstMPEGDescriptor *program_info = PMT_stream->PMT.program_info;
|
|
guint8 *desc = NULL;
|
|
|
|
if (program_info)
|
|
desc = gst_mpeg_descriptor_find (program_info, DESC_REGISTRATION);
|
|
|
|
if (desc && DESC_REGISTRATION_format_identifier (desc) == DRF_ID_HDMV) {
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/x-eac3", NULL);
|
|
} else if (gst_mpeg_descriptor_find (stream->ES_info,
|
|
DESC_DVB_ENHANCED_AC3)) {
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/x-eac3", NULL);
|
|
} else {
|
|
if (!gst_mpeg_descriptor_find (stream->ES_info, DESC_DVB_AC3)) {
|
|
GST_WARNING ("AC3 stream type found but no corresponding "
|
|
"descriptor to differentiate between AC3 and EAC3. "
|
|
"Assuming plain AC3.");
|
|
}
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/x-ac3", NULL);
|
|
}
|
|
break;
|
|
}
|
|
case ST_BD_AUDIO_EAC3:
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/x-eac3", NULL);
|
|
break;
|
|
case ST_PS_AUDIO_DTS:
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/x-dts", NULL);
|
|
break;
|
|
case ST_PS_AUDIO_LPCM:
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/x-lpcm", NULL);
|
|
break;
|
|
case ST_BD_AUDIO_LPCM:
|
|
template = klass->audio_template;
|
|
name = g_strdup_printf ("audio_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("audio/x-private-ts-lpcm", NULL);
|
|
break;
|
|
case ST_PS_DVD_SUBPICTURE:
|
|
template = klass->subpicture_template;
|
|
name = g_strdup_printf ("subpicture_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("video/x-dvd-subpicture", NULL);
|
|
break;
|
|
case ST_BD_PGS_SUBPICTURE:
|
|
template = klass->subpicture_template;
|
|
name = g_strdup_printf ("subpicture_%04x", stream->PID);
|
|
caps = gst_caps_new_simple ("subpicture/x-pgs", NULL);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (name == NULL || template == NULL || caps == NULL)
|
|
return FALSE;
|
|
|
|
stream->stream_type = stream_type;
|
|
stream->id = id;
|
|
GST_DEBUG ("creating new pad %s", name);
|
|
stream->pad = gst_pad_new_from_template (template, name);
|
|
gst_pad_use_fixed_caps (stream->pad);
|
|
gst_pad_set_caps (stream->pad, caps);
|
|
gst_caps_unref (caps);
|
|
gst_pad_set_query_function (stream->pad,
|
|
GST_DEBUG_FUNCPTR (gst_mpegts_demux_src_pad_query));
|
|
gst_pad_set_query_type_function (stream->pad,
|
|
GST_DEBUG_FUNCPTR (gst_mpegts_demux_src_pad_query_type));
|
|
gst_pad_set_event_function (stream->pad,
|
|
GST_DEBUG_FUNCPTR (gst_mpegts_demux_src_event));
|
|
g_free (name);
|
|
|
|
return TRUE;
|
|
|
|
wrong_type:
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static FORCE_INLINE gboolean
|
|
mpegts_is_elem_pid (GstMpegTSDemux * demux, guint16 PID)
|
|
{
|
|
int i;
|
|
|
|
/* check if it's in our partial ts pid list */
|
|
for (i = 0; i < demux->nb_elementary_pids; i++) {
|
|
if (demux->elementary_pids[i] == PID) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_send_new_segment (GstMpegTSDemux * demux,
|
|
GstMpegTSStream * stream, gint64 pts)
|
|
{
|
|
GstMpegTSStream *PCR_stream;
|
|
GstMpegTSStream *PMT_stream;
|
|
GstClockTime time;
|
|
guint64 base_PCR;
|
|
|
|
/* for the reference start time we need to consult the PCR_PID of the
|
|
* current PMT */
|
|
if (demux->current_PMT == 0)
|
|
goto no_pmt;
|
|
|
|
PMT_stream = demux->streams[demux->current_PMT];
|
|
if (PMT_stream == NULL)
|
|
goto no_pmt_stream;
|
|
|
|
PCR_stream = demux->streams[PMT_stream->PMT.PCR_PID];
|
|
if (PCR_stream == NULL)
|
|
goto no_pcr_stream;
|
|
|
|
if (PCR_stream->base_PCR == -1) {
|
|
GST_DEBUG_OBJECT (demux, "no base PCR, using last PCR %" G_GUINT64_FORMAT,
|
|
PCR_stream->last_PCR);
|
|
PCR_stream->base_PCR = PCR_stream->last_PCR;
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux, "using base PCR %" G_GUINT64_FORMAT,
|
|
PCR_stream->base_PCR);
|
|
}
|
|
if (PCR_stream->last_PCR == -1) {
|
|
GST_DEBUG_OBJECT (demux, "no last PCR, using PTS %" G_GUINT64_FORMAT, pts);
|
|
PCR_stream->base_PCR = pts;
|
|
PCR_stream->last_PCR = pts;
|
|
}
|
|
base_PCR = PCR_stream->base_PCR;
|
|
|
|
demux->base_pts = time = MPEGTIME_TO_GSTTIME (base_PCR);
|
|
|
|
GST_DEBUG_OBJECT (demux, "segment PTS to (%" G_GUINT64_FORMAT ") time: %"
|
|
GST_TIME_FORMAT, base_PCR, GST_TIME_ARGS (time));
|
|
|
|
if (demux->clock && demux->clock_base == GST_CLOCK_TIME_NONE) {
|
|
demux->clock_base = gst_clock_get_time (demux->clock);
|
|
gst_clock_set_calibration (demux->clock,
|
|
gst_clock_get_internal_time (demux->clock), demux->clock_base, 1, 1);
|
|
}
|
|
|
|
gst_pad_push_event (stream->pad,
|
|
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, time, -1, 0));
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_pmt:
|
|
{
|
|
/* check if it's in our partial ts pid list */
|
|
if (mpegts_is_elem_pid (demux, stream->PID)) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Elementary PID, using pts %" G_GUINT64_FORMAT, pts);
|
|
time = MPEGTIME_TO_GSTTIME (pts) + stream->base_time;
|
|
GST_DEBUG_OBJECT (demux, "segment PTS to (%" G_GUINT64_FORMAT ") time: %"
|
|
G_GUINT64_FORMAT, pts, time);
|
|
|
|
gst_pad_push_event (stream->pad,
|
|
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, time, -1, 0));
|
|
return TRUE;
|
|
}
|
|
|
|
}
|
|
no_pmt_stream:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "no PMT stream found");
|
|
return FALSE;
|
|
}
|
|
no_pcr_stream:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "no PCR stream found");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_mpegts_demux_send_tags_for_stream (GstMpegTSDemux * demux,
|
|
GstMpegTSStream * stream)
|
|
{
|
|
GstTagList *list = NULL;
|
|
|
|
if (stream->ES_info) {
|
|
guint8 *iso639_languages =
|
|
gst_mpeg_descriptor_find (stream->ES_info, DESC_ISO_639_LANGUAGE);
|
|
if (iso639_languages) {
|
|
if (DESC_ISO_639_LANGUAGE_codes_n (iso639_languages)) {
|
|
gchar lang_code[4];
|
|
gchar *language_n = (gchar *)
|
|
DESC_ISO_639_LANGUAGE_language_code_nth (iso639_languages, 0);
|
|
lang_code[0] = language_n[0];
|
|
lang_code[1] = language_n[1];
|
|
lang_code[2] = language_n[2];
|
|
lang_code[3] = 0;
|
|
if (!list)
|
|
list = gst_tag_list_new ();
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
|
GST_TAG_LANGUAGE_CODE, lang_code, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (list) {
|
|
GST_DEBUG_OBJECT (demux, "Sending tags %p for pad %s:%s",
|
|
list, GST_DEBUG_PAD_NAME (stream->pad));
|
|
gst_element_found_tags_for_pad (GST_ELEMENT (demux), stream->pad, list);
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_mpegts_demux_combine_flows (GstMpegTSDemux * demux,
|
|
GstMpegTSStream * stream, GstFlowReturn ret)
|
|
{
|
|
gint i;
|
|
|
|
/* store the value */
|
|
stream->last_ret = ret;
|
|
|
|
/* if it's success we can return the value right away */
|
|
if (GST_FLOW_IS_SUCCESS (ret))
|
|
goto done;
|
|
|
|
/* any other error that is not-linked can be returned right
|
|
* away */
|
|
if (ret != GST_FLOW_NOT_LINKED)
|
|
goto done;
|
|
|
|
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
|
|
for (i = 0; i < MPEGTS_MAX_PID + 1; i++) {
|
|
if (!(stream = demux->streams[i]))
|
|
continue;
|
|
|
|
/* some other return value (must be SUCCESS but we can return
|
|
* other values as well) */
|
|
ret = stream->last_ret;
|
|
if (ret != GST_FLOW_NOT_LINKED)
|
|
goto done;
|
|
}
|
|
/* if we get here, all other pads were unlinked and we return
|
|
* NOT_LINKED then */
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstFlowReturn
|
|
gst_mpegts_demux_data_cb (GstPESFilter * filter, gboolean first,
|
|
GstBuffer * buffer, GstMpegTSStream * stream)
|
|
{
|
|
GstMpegTSDemux *demux;
|
|
GstFlowReturn ret;
|
|
GstPad *srcpad;
|
|
gint64 pts;
|
|
GstClockTime time;
|
|
|
|
demux = stream->demux;
|
|
srcpad = stream->pad;
|
|
|
|
GST_DEBUG_OBJECT (demux, "got data on PID 0x%04x", stream->PID);
|
|
|
|
if (first && filter->pts != -1) {
|
|
pts = filter->pts;
|
|
time = MPEGTIME_TO_GSTTIME (pts) + stream->base_time;
|
|
|
|
if ((stream->last_time > 0 && stream->last_time < time &&
|
|
time - stream->last_time > GST_SECOND * 60 * 10)
|
|
|| (stream->last_time > time
|
|
&& stream->last_time - time > GST_SECOND * 60 * 10)) {
|
|
/* check first to see if we're in middle of detecting a discont in PCR.
|
|
* if we are we're not sure what timestamp the buffer should have, best
|
|
* to drop. */
|
|
if (stream->PMT_pid <= MPEGTS_MAX_PID && demux->streams[stream->PMT_pid]
|
|
&& demux->streams[demux->streams[stream->PMT_pid]->PMT.PCR_PID]
|
|
&& demux->streams[demux->streams[stream->PMT_pid]->PMT.
|
|
PCR_PID]->discont_PCR) {
|
|
GST_WARNING_OBJECT (demux, "middle of discont, dropping");
|
|
goto bad_timestamp;
|
|
}
|
|
/* check for wraparounds */
|
|
else if (stream->last_time > 0 && time < stream->last_time &&
|
|
stream->last_time - time > MPEGTIME_TO_GSTTIME (G_MAXUINT32)) {
|
|
/* wrap around occurred */
|
|
if (stream->base_time + MPEGTIME_TO_GSTTIME ((guint64) (1) << 33) +
|
|
MPEGTIME_TO_GSTTIME (pts) >
|
|
stream->last_time + GST_SECOND * 60 * 10) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"looks like we have a corrupt packet because its pts is a lot lower than"
|
|
" the previous pts but not a wraparound");
|
|
goto bad_timestamp;
|
|
}
|
|
/* wraparound has occured but before we have detected in the pcr,
|
|
* so check we're actually getting pcr's...if we are, don't update
|
|
* the base time..just set the time and last_time correctly
|
|
*/
|
|
if (stream->PMT_pid <= MPEGTS_MAX_PID && demux->streams[stream->PMT_pid]
|
|
&& demux->streams[demux->streams[stream->PMT_pid]->PMT.PCR_PID]
|
|
&& demux->streams[demux->streams[stream->PMT_pid]->PMT.
|
|
PCR_PID]->last_PCR > 0) {
|
|
GST_DEBUG_OBJECT (demux, "timestamps wrapped before noticed in PCR");
|
|
time = MPEGTIME_TO_GSTTIME (pts) + stream->base_time +
|
|
MPEGTIME_TO_GSTTIME ((guint64) (1) << 33);
|
|
stream->last_time = time;
|
|
} else {
|
|
stream->base_time = stream->base_time +
|
|
MPEGTIME_TO_GSTTIME ((guint64) (1) << 33);
|
|
time = MPEGTIME_TO_GSTTIME (pts) + stream->base_time;
|
|
GST_DEBUG_OBJECT (demux,
|
|
"timestamps wrapped around, compensating with new base time: %"
|
|
GST_TIME_FORMAT "last time: %" GST_TIME_FORMAT " time: %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (stream->base_time),
|
|
GST_TIME_ARGS (stream->last_time), GST_TIME_ARGS (time));
|
|
stream->last_time = time;
|
|
}
|
|
} else if (stream->last_time > 0 && time > stream->last_time &&
|
|
time - stream->last_time > MPEGTIME_TO_GSTTIME (G_MAXUINT32) &&
|
|
stream->base_time > 0) {
|
|
/* had a previous wrap around */
|
|
if (time - MPEGTIME_TO_GSTTIME ((guint64) (1) << 33) +
|
|
GST_SECOND * 60 * 10 < stream->last_time) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"looks like we have a corrupt packet because its pts is a lot higher than"
|
|
" the previous pts but not because of a wraparound or pcr discont");
|
|
goto bad_timestamp;
|
|
}
|
|
if (ABS ((time - MPEGTIME_TO_GSTTIME ((guint64) (1) << 33)) -
|
|
stream->last_time) < GST_SECOND) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"timestamps wrapped around earlier but we have an out of pts: %"
|
|
G_GUINT64_FORMAT ", as %" GST_TIME_FORMAT " translated to: %"
|
|
GST_TIME_FORMAT " and last_time of %" GST_TIME_FORMAT, pts,
|
|
GST_TIME_ARGS (time),
|
|
GST_TIME_ARGS (time - MPEGTIME_TO_GSTTIME ((guint64) (1) << 33)),
|
|
GST_TIME_ARGS (stream->last_time));
|
|
time = time - MPEGTIME_TO_GSTTIME ((guint64) (1) << 33);
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"timestamp may have wrapped around recently but not sure and pts"
|
|
" is very different, dropping it timestamp of this packet: %"
|
|
GST_TIME_FORMAT " compared to last timestamp: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (time -
|
|
MPEGTIME_TO_GSTTIME ((guint64) (1) << (33))),
|
|
GST_TIME_ARGS (stream->last_time));
|
|
goto bad_timestamp;
|
|
}
|
|
|
|
} else {
|
|
/* we must have a corrupt packet */
|
|
GST_WARNING_OBJECT (demux, "looks like we have a corrupt packet because"
|
|
" its timestamp is buggered timestamp: %" GST_TIME_FORMAT
|
|
" compared to" " last timestamp: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (time), GST_TIME_ARGS (stream->last_time));
|
|
goto bad_timestamp;
|
|
}
|
|
} else { /* do not set last_time if a packet with pts from before wrap
|
|
around arrived after the wrap around occured */
|
|
stream->last_time = time;
|
|
}
|
|
} else {
|
|
time = GST_CLOCK_TIME_NONE;
|
|
pts = -1;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "setting PTS to (%" G_GUINT64_FORMAT ") time: %"
|
|
GST_TIME_FORMAT " on buffer %p first buffer: %d base_time: %"
|
|
GST_TIME_FORMAT, pts, GST_TIME_ARGS (time), buffer, first,
|
|
GST_TIME_ARGS (stream->base_time));
|
|
|
|
GST_BUFFER_TIMESTAMP (buffer) = time;
|
|
|
|
/* check if we have a pad already */
|
|
if (srcpad == NULL) {
|
|
/* fill in the last bits of the stream */
|
|
/* if no stream type, then assume it based on the PES start code,
|
|
* needed for partial ts streams without PMT */
|
|
if (G_UNLIKELY (stream->flags & MPEGTS_STREAM_FLAG_STREAM_TYPE_UNKNOWN)) {
|
|
if ((filter->start_code & 0xFFFFFFF0) == PACKET_VIDEO_START_CODE) {
|
|
/* it is mpeg2 video */
|
|
stream->stream_type = ST_VIDEO_MPEG2;
|
|
stream->flags &= ~MPEGTS_STREAM_FLAG_STREAM_TYPE_UNKNOWN;
|
|
stream->flags |= MPEGTS_STREAM_FLAG_IS_VIDEO;
|
|
GST_DEBUG_OBJECT (demux, "Found stream 0x%04x without PMT with video "
|
|
"start_code. Treating as video", stream->PID);
|
|
} else if ((filter->start_code & 0xFFFFFFE0) == PACKET_AUDIO_START_CODE) {
|
|
/* it is mpeg audio */
|
|
stream->stream_type = ST_AUDIO_MPEG2;
|
|
stream->flags &= ~MPEGTS_STREAM_FLAG_STREAM_TYPE_UNKNOWN;
|
|
GST_DEBUG_OBJECT (demux, "Found stream 0x%04x without PMT with audio "
|
|
"start_code. Treating as audio", stream->PID);
|
|
} else {
|
|
GST_LOG_OBJECT (demux, "Stream start code on pid 0x%04x is: 0x%x",
|
|
stream->PID, filter->start_code);
|
|
}
|
|
}
|
|
if (!gst_mpegts_demux_fill_stream (stream, filter->id, stream->stream_type))
|
|
goto unknown_type;
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"New stream 0x%04x of type 0x%02x with caps %" GST_PTR_FORMAT,
|
|
stream->PID, stream->stream_type, GST_PAD_CAPS (stream->pad));
|
|
|
|
srcpad = stream->pad;
|
|
|
|
/* activate and add */
|
|
gst_pad_set_active (srcpad, TRUE);
|
|
gst_element_add_pad (GST_ELEMENT_CAST (demux), srcpad);
|
|
demux->need_no_more_pads = TRUE;
|
|
|
|
stream->discont = TRUE;
|
|
|
|
/* send new_segment */
|
|
gst_mpegts_demux_send_new_segment (demux, stream, pts);
|
|
|
|
/* send tags */
|
|
gst_mpegts_demux_send_tags_for_stream (demux, stream);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (srcpad, "pushing buffer");
|
|
gst_buffer_set_caps (buffer, GST_PAD_CAPS (srcpad));
|
|
if (stream->discont) {
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
|
|
stream->discont = FALSE;
|
|
}
|
|
ret = gst_pad_push (srcpad, buffer);
|
|
ret = gst_mpegts_demux_combine_flows (demux, stream, ret);
|
|
|
|
return ret;
|
|
|
|
/* ERROR */
|
|
unknown_type:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "got unknown stream id 0x%02x, type 0x%02x",
|
|
filter->id, stream->stream_type);
|
|
gst_buffer_unref (buffer);
|
|
return gst_mpegts_demux_combine_flows (demux, stream, GST_FLOW_NOT_LINKED);
|
|
}
|
|
bad_timestamp:
|
|
{
|
|
gst_buffer_unref (buffer);
|
|
return gst_mpegts_demux_combine_flows (demux, stream, GST_FLOW_OK);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
gst_mpegts_demux_resync_cb (GstPESFilter * filter, GstMpegTSStream * stream)
|
|
{
|
|
/* does nothing for now */
|
|
}
|
|
|
|
/*
|
|
* CA_section() {
|
|
* table_id 8 uimsbf == 0x01
|
|
* section_syntax_indicator 1 bslbf == 1
|
|
* '0' 1 bslbf == 0
|
|
* reserved 2 bslbf
|
|
* section_length 12 uimsbf == 00xxxxx...
|
|
* reserved 18 bslbf
|
|
* version_number 5 uimsbf
|
|
* current_next_indicator 1 bslbf
|
|
* section_number 8 uimsbf
|
|
* last_section_number 8 uimsbf
|
|
* for (i=0; i<N;i++) {
|
|
* descriptor()
|
|
* }
|
|
* CRC_32 32 rpchof
|
|
* }
|
|
*/
|
|
static FORCE_INLINE gboolean
|
|
gst_mpegts_stream_parse_cat (GstMpegTSStream * stream,
|
|
guint8 * data, guint datalen)
|
|
{
|
|
GstMpegTSDemux *demux;
|
|
|
|
demux = stream->demux;
|
|
|
|
GST_DEBUG_OBJECT (demux, "parsing CA section");
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_mpegts_activate_pmt (GstMpegTSDemux * demux, GstMpegTSStream * stream)
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "activating PMT 0x%08x", stream->PID);
|
|
|
|
/* gst_mpegts_demux_remove_pads (demux); */
|
|
|
|
demux->current_PMT = stream->PID;
|
|
|
|
/* PMT has been updated, signal the change */
|
|
if (demux->current_PMT == stream->PID)
|
|
g_object_notify ((GObject *) (demux), "pmt-info");
|
|
}
|
|
|
|
/*
|
|
* TS_program_map_section() {
|
|
* table_id 8 uimsbf == 0x02
|
|
* section_syntax_indicator 1 bslbf == 1
|
|
* '0' 1 bslbf == 0
|
|
* reserved 2 bslbf
|
|
* section_length 12 uimsbf == 00xxxxx...
|
|
* program_number 16 uimsbf
|
|
* reserved 2 bslbf
|
|
* version_number 5 uimsbf
|
|
* current_next_indicator 1 bslbf
|
|
* section_number 8 uimsbf
|
|
* last_section_number 8 uimsbf
|
|
* reserved 3 bslbf
|
|
* PCR_PID 13 uimsbf
|
|
* reserved 4 bslbf
|
|
* program_info_length 12 uimsbf == 00xxxxx...
|
|
* for (i=0; i<N; i++) {
|
|
* descriptor()
|
|
* }
|
|
* for (i=0;i<N1;i++) {
|
|
* stream_type 8 uimsbf
|
|
* reserved 3 bslbf
|
|
* elementary_PID 13 uimsnf
|
|
* reserved 4 bslbf
|
|
* ES_info_length 12 uimsbf == 00xxxxx...
|
|
* for (i=0; i<N2; i++) {
|
|
* descriptor()
|
|
* }
|
|
* }
|
|
* CRC_32 32 rpchof
|
|
* }
|
|
*/
|
|
static FORCE_INLINE gboolean
|
|
gst_mpegts_stream_parse_pmt (GstMpegTSStream * stream,
|
|
guint8 * data, guint datalen)
|
|
{
|
|
GstMpegTSDemux *demux;
|
|
gint entries;
|
|
guint32 CRC;
|
|
GstMpegTSPMT *PMT;
|
|
guint version_number;
|
|
guint8 current_next_indicator;
|
|
guint16 program_number;
|
|
|
|
demux = stream->demux;
|
|
|
|
if (G_UNLIKELY (*data++ != 0x02))
|
|
goto wrong_id;
|
|
if ((data[0] & 0xc0) != 0x80)
|
|
goto wrong_sync;
|
|
if ((data[0] & 0x0c) != 0x00)
|
|
goto wrong_seclen;
|
|
|
|
data += 2;
|
|
|
|
if (demux->check_crc)
|
|
if (G_UNLIKELY (gst_mpegts_demux_calc_crc32 (data - 3, datalen) != 0))
|
|
goto wrong_crc;
|
|
|
|
GST_LOG_OBJECT (demux, "PMT section_length: %d", datalen - 3);
|
|
|
|
PMT = &stream->PMT;
|
|
|
|
/* check if version number changed */
|
|
version_number = (data[2] & 0x3e) >> 1;
|
|
GST_LOG_OBJECT (demux, "PMT version_number: %d", version_number);
|
|
|
|
current_next_indicator = (data[2] & 0x01);
|
|
GST_LOG_OBJECT (demux, "PMT current_next_indicator %d",
|
|
current_next_indicator);
|
|
if (current_next_indicator == 0)
|
|
goto not_yet_applicable;
|
|
program_number = GST_READ_UINT16_BE (data);
|
|
|
|
if (demux->program_number != -1 && demux->program_number != program_number) {
|
|
goto wrong_program_number;
|
|
}
|
|
if (demux->program_number == -1) {
|
|
GST_INFO_OBJECT (demux, "No program number set, so using first parsed PMT"
|
|
"'s program number: %d", program_number);
|
|
demux->program_number = program_number;
|
|
}
|
|
|
|
if (version_number == PMT->version_number)
|
|
goto same_version;
|
|
|
|
PMT->version_number = version_number;
|
|
PMT->current_next_indicator = current_next_indicator;
|
|
|
|
stream->PMT.program_number = program_number;
|
|
data += 3;
|
|
GST_DEBUG_OBJECT (demux, "PMT program_number: %d", PMT->program_number);
|
|
|
|
PMT->section_number = *data++;
|
|
GST_DEBUG_OBJECT (demux, "PMT section_number: %d", PMT->section_number);
|
|
|
|
PMT->last_section_number = *data++;
|
|
GST_DEBUG_OBJECT (demux, "PMT last_section_number: %d",
|
|
PMT->last_section_number);
|
|
|
|
PMT->PCR_PID = GST_READ_UINT16_BE (data);
|
|
PMT->PCR_PID &= 0x1fff;
|
|
data += 2;
|
|
GST_DEBUG_OBJECT (demux, "PMT PCR_PID: 0x%04x", PMT->PCR_PID);
|
|
/* create or get stream, not much we can say about it except that when we get
|
|
* a data stream and we need a PCR, we can use the stream to get/store the
|
|
* base_PCR. */
|
|
gst_mpegts_demux_get_stream_for_PID (demux, PMT->PCR_PID);
|
|
|
|
if ((data[0] & 0x0c) != 0x00)
|
|
goto wrong_pilen;
|
|
|
|
PMT->program_info_length = GST_READ_UINT16_BE (data);
|
|
PMT->program_info_length &= 0x0fff;
|
|
/* FIXME: validate value of program_info_length */
|
|
data += 2;
|
|
|
|
/* FIXME: validate value of program_info_length, before using */
|
|
|
|
/* parse descriptor */
|
|
if (G_UNLIKELY (PMT->program_info))
|
|
gst_mpeg_descriptor_free (PMT->program_info);
|
|
PMT->program_info =
|
|
gst_mpeg_descriptor_parse (data, PMT->program_info_length);
|
|
|
|
/* skip descriptor */
|
|
data += PMT->program_info_length;
|
|
GST_DEBUG_OBJECT (demux, "PMT program_info_length: %d",
|
|
PMT->program_info_length);
|
|
|
|
entries = datalen - 3 - PMT->program_info_length - 9 - 4;
|
|
|
|
if (G_UNLIKELY (PMT->entries))
|
|
g_array_free (PMT->entries, TRUE);
|
|
PMT->entries = g_array_new (FALSE, TRUE, sizeof (GstMpegTSPMTEntry));
|
|
|
|
while (entries > 0) {
|
|
GstMpegTSPMTEntry entry;
|
|
GstMpegTSStream *ES_stream;
|
|
guint8 stream_type;
|
|
guint16 ES_info_length;
|
|
|
|
stream_type = *data++;
|
|
|
|
entry.PID = GST_READ_UINT16_BE (data);
|
|
entry.PID &= 0x1fff;
|
|
data += 2;
|
|
|
|
if ((data[0] & 0x0c) != 0x00)
|
|
goto wrong_esilen;
|
|
|
|
ES_info_length = GST_READ_UINT16_BE (data);
|
|
ES_info_length &= 0x0fff;
|
|
data += 2;
|
|
|
|
/* get/create elementary stream */
|
|
ES_stream = gst_mpegts_demux_get_stream_for_PID (demux, entry.PID);
|
|
/* check if PID unknown */
|
|
if (ES_stream->PID_type == PID_TYPE_UNKNOWN) {
|
|
/* set as elementary */
|
|
ES_stream->PID_type = PID_TYPE_ELEMENTARY;
|
|
/* set stream type */
|
|
/* hack for ITV HD (sid 10510, video pid 3401 */
|
|
if (program_number == 10510 && entry.PID == 3401 &&
|
|
stream_type == ST_PRIVATE_DATA)
|
|
stream_type = ST_VIDEO_H264;
|
|
ES_stream->stream_type = stream_type;
|
|
ES_stream->flags &= ~MPEGTS_STREAM_FLAG_STREAM_TYPE_UNKNOWN;
|
|
|
|
/* init base and last time */
|
|
ES_stream->base_time = 0;
|
|
ES_stream->last_time = 0;
|
|
|
|
/* parse descriptor */
|
|
ES_stream->ES_info = gst_mpeg_descriptor_parse (data, ES_info_length);
|
|
|
|
if (stream_type == ST_PRIVATE_SECTIONS) {
|
|
/* not really an ES, so use section filter not pes filter */
|
|
/* initialise section filter */
|
|
GstCaps *caps;
|
|
gst_section_filter_init (&ES_stream->section_filter);
|
|
ES_stream->PID_type = PID_TYPE_PRIVATE_SECTION;
|
|
ES_stream->pad = gst_pad_new_from_static_template (&private_template,
|
|
g_strdup_printf ("private_%04x", entry.PID));
|
|
gst_pad_set_active (ES_stream->pad, TRUE);
|
|
caps = gst_caps_new_simple ("application/x-mpegts-private-section",
|
|
NULL);
|
|
gst_pad_use_fixed_caps (ES_stream->pad);
|
|
gst_pad_set_caps (ES_stream->pad, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
gst_element_add_pad (GST_ELEMENT_CAST (demux), ES_stream->pad);
|
|
} else {
|
|
/* Recognise video streams based on stream_type */
|
|
if (gst_mpegts_stream_is_video (ES_stream))
|
|
ES_stream->flags |= MPEGTS_STREAM_FLAG_IS_VIDEO;
|
|
|
|
/* set adaptor */
|
|
gst_pes_filter_init (&ES_stream->filter, NULL, NULL);
|
|
gst_pes_filter_set_callbacks (&ES_stream->filter,
|
|
(GstPESFilterData) gst_mpegts_demux_data_cb,
|
|
(GstPESFilterResync) gst_mpegts_demux_resync_cb, ES_stream);
|
|
if (ES_stream->flags & MPEGTS_STREAM_FLAG_IS_VIDEO)
|
|
ES_stream->filter.allow_unbounded = TRUE;
|
|
ES_stream->PMT_pid = stream->PID;
|
|
}
|
|
}
|
|
/* skip descriptor */
|
|
data += ES_info_length;
|
|
GST_DEBUG_OBJECT (demux,
|
|
" PMT stream_type: %02x, PID: 0x%04x (ES_info_len %d)", stream_type,
|
|
entry.PID, ES_info_length);
|
|
|
|
g_array_append_val (PMT->entries, entry);
|
|
|
|
entries -= 5 + ES_info_length;
|
|
}
|
|
CRC = GST_READ_UINT32_BE (data);
|
|
GST_DEBUG_OBJECT (demux, "PMT CRC: 0x%08x", CRC);
|
|
|
|
if (demux->program_number == -1) {
|
|
/* No program specified, take the first PMT */
|
|
if (demux->current_PMT == 0 || demux->current_PMT == stream->PID)
|
|
gst_mpegts_activate_pmt (demux, stream);
|
|
} else {
|
|
/* Program specified, activate this if it matches */
|
|
if (demux->program_number == PMT->program_number)
|
|
gst_mpegts_activate_pmt (demux, stream);
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
wrong_crc:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "wrong crc");
|
|
return FALSE;
|
|
}
|
|
same_version:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "same version as existing PMT");
|
|
return TRUE;
|
|
}
|
|
wrong_program_number:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "PMT is for program number we don't care about");
|
|
return TRUE;
|
|
}
|
|
|
|
not_yet_applicable:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "Ignoring PMT with current_next_indicator = 0");
|
|
return TRUE;
|
|
}
|
|
wrong_id:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "expected table_id == 0, got 0x%02x", data[0]);
|
|
return FALSE;
|
|
}
|
|
wrong_sync:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "expected sync 10, got %02x", data[0]);
|
|
return FALSE;
|
|
}
|
|
wrong_seclen:
|
|
{
|
|
GST_DEBUG_OBJECT (demux,
|
|
"first two bits of section length must be 0, got %02x", data[0]);
|
|
return FALSE;
|
|
}
|
|
wrong_pilen:
|
|
{
|
|
GST_DEBUG_OBJECT (demux,
|
|
"first two bits of program_info length must be 0, got %02x", data[0]);
|
|
return FALSE;
|
|
}
|
|
wrong_esilen:
|
|
{
|
|
GST_DEBUG_OBJECT (demux,
|
|
"first two bits of ES_info length must be 0, got %02x", data[0]);
|
|
g_array_free (stream->PMT.entries, TRUE);
|
|
stream->PMT.entries = NULL;
|
|
gst_mpeg_descriptor_free (stream->PMT.program_info);
|
|
stream->PMT.program_info = NULL;
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* private_section() {
|
|
* table_id 8 uimsbf
|
|
* section_syntax_indicator 1 bslbf
|
|
* private_indicator 1 bslbf
|
|
* reserved 2 bslbf
|
|
* private_section_length 12 uimsbf
|
|
* if (section_syntax_indicator == '0') {
|
|
* for ( i=0;i<N;i++) {
|
|
* private_data_byte 8 bslbf
|
|
* }
|
|
* }
|
|
* else {
|
|
* table_id_extension 16 uimsbf
|
|
* reserved 2 bslbf
|
|
* version_number 5 uimsbf
|
|
* current_next_indicator 1 bslbf
|
|
* section_number 8 uimsbf
|
|
* last_section_number 8 uimsbf
|
|
* for ( i=0;i<private_section_length-9;i++) {
|
|
* private_data_byte 8 bslbf
|
|
* }
|
|
* CRC_32 32 rpchof
|
|
* }
|
|
* }
|
|
*/
|
|
static FORCE_INLINE gboolean
|
|
gst_mpegts_stream_parse_private_section (GstMpegTSStream * stream,
|
|
guint8 * data, guint datalen)
|
|
{
|
|
GstMpegTSDemux *demux;
|
|
GstBuffer *buffer;
|
|
demux = stream->demux;
|
|
|
|
if (demux->check_crc)
|
|
if (gst_mpegts_demux_calc_crc32 (data, datalen) != 0)
|
|
goto wrong_crc;
|
|
|
|
/* just dump this down the pad */
|
|
if (gst_pad_alloc_buffer (stream->pad, 0, datalen, NULL, &buffer) ==
|
|
GST_FLOW_OK) {
|
|
oil_memcpy (buffer->data, data, datalen);
|
|
gst_pad_push (stream->pad, buffer);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "parsing private section");
|
|
return TRUE;
|
|
|
|
wrong_crc:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "wrong crc");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* adaptation_field() {
|
|
* adaptation_field_length 8 uimsbf
|
|
* if(adaptation_field_length >0) {
|
|
* discontinuity_indicator 1 bslbf
|
|
* random_access_indicator 1 bslbf
|
|
* elementary_stream_priority_indicator 1 bslbf
|
|
* PCR_flag 1 bslbf
|
|
* OPCR_flag 1 bslbf
|
|
* splicing_point_flag 1 bslbf
|
|
* transport_private_data_flag 1 bslbf
|
|
* adaptation_field_extension_flag 1 bslbf
|
|
* if(PCR_flag == '1') {
|
|
* program_clock_reference_base 33 uimsbf
|
|
* reserved 6 bslbf
|
|
* program_clock_reference_extension 9 uimsbf
|
|
* }
|
|
* if(OPCR_flag == '1') {
|
|
* original_program_clock_reference_base 33 uimsbf
|
|
* reserved 6 bslbf
|
|
* original_program_clock_reference_extension 9 uimsbf
|
|
* }
|
|
* if (splicing_point_flag == '1') {
|
|
* splice_countdown 8 tcimsbf
|
|
* }
|
|
* if(transport_private_data_flag == '1') {
|
|
* transport_private_data_length 8 uimsbf
|
|
* for (i=0; i<transport_private_data_length;i++){
|
|
* private_data_byte 8 bslbf
|
|
* }
|
|
* }
|
|
* if (adaptation_field_extension_flag == '1' ) {
|
|
* adaptation_field_extension_length 8 uimsbf
|
|
* ltw_flag 1 bslbf
|
|
* piecewise_rate_flag 1 bslbf
|
|
* seamless_splice_flag 1 bslbf
|
|
* reserved 5 bslbf
|
|
* if (ltw_flag == '1') {
|
|
* ltw_valid_flag 1 bslbf
|
|
* ltw_offset 15 uimsbf
|
|
* }
|
|
* if (piecewise_rate_flag == '1') {
|
|
* reserved 2 bslbf
|
|
* piecewise_rate 22 uimsbf
|
|
* }
|
|
* if (seamless_splice_flag == '1'){
|
|
* splice_type 4 bslbf
|
|
* DTS_next_AU[32..30] 3 bslbf
|
|
* marker_bit 1 bslbf
|
|
* DTS_next_AU[29..15] 15 bslbf
|
|
* marker_bit 1 bslbf
|
|
* DTS_next_AU[14..0] 15 bslbf
|
|
* marker_bit 1 bslbf
|
|
* }
|
|
* for ( i=0;i<N;i++) {
|
|
* reserved 8 bslbf
|
|
* }
|
|
* }
|
|
* for (i=0;i<N;i++){
|
|
* stuffing_byte 8 bslbf
|
|
* }
|
|
* }
|
|
* }
|
|
*/
|
|
static FORCE_INLINE gboolean
|
|
gst_mpegts_demux_parse_adaptation_field (GstMpegTSStream * stream,
|
|
const guint8 * data, guint data_len, guint * consumed)
|
|
{
|
|
GstMpegTSDemux *demux;
|
|
guint8 length;
|
|
guint8 *data_end;
|
|
gint i;
|
|
GstMpegTSStream *pmt_stream;
|
|
|
|
demux = stream->demux;
|
|
|
|
data_end = ((guint8 *) data) + data_len;
|
|
|
|
length = *data++;
|
|
if (G_UNLIKELY (length > data_len))
|
|
goto wrong_length;
|
|
|
|
GST_DEBUG_OBJECT (demux, "parsing adaptation field, length %d", length);
|
|
|
|
if (length > 0) {
|
|
guint8 flags = *data++;
|
|
|
|
GST_LOG_OBJECT (demux, "flags 0x%02x", flags);
|
|
/* discontinuity flag */
|
|
if (flags & 0x80) {
|
|
GST_DEBUG_OBJECT (demux, "discontinuity flag set");
|
|
}
|
|
/* PCR_flag */
|
|
if (flags & 0x10) {
|
|
guint32 pcr1;
|
|
guint16 pcr2;
|
|
guint64 pcr, pcr_ext;
|
|
gboolean valid_pcr = TRUE;
|
|
|
|
pcr1 = GST_READ_UINT32_BE (data);
|
|
pcr2 = GST_READ_UINT16_BE (data + 4);
|
|
pcr = ((guint64) pcr1) << 1;
|
|
pcr |= (pcr2 & 0x8000) >> 15;
|
|
pcr_ext = (pcr2 & 0x01ff);
|
|
if (pcr_ext)
|
|
pcr = (pcr * 300 + pcr_ext % 300) / 300;
|
|
GST_DEBUG_OBJECT (demux,
|
|
"have PCR %" G_GUINT64_FORMAT "(%" GST_TIME_FORMAT ") on PID 0x%04x "
|
|
"and last pcr is %" G_GUINT64_FORMAT " (%" GST_TIME_FORMAT ")", pcr,
|
|
GST_TIME_ARGS (MPEGTIME_TO_GSTTIME (pcr)), stream->PID,
|
|
stream->last_PCR,
|
|
GST_TIME_ARGS (MPEGTIME_TO_GSTTIME (stream->last_PCR)));
|
|
/* pcr has been converted into units of 90Khz ticks
|
|
* so assume discont if last pcr was > 900000 (10 second) lower */
|
|
if (stream->last_PCR != -1 &&
|
|
(pcr - stream->last_PCR > 900000 || pcr < stream->last_PCR)) {
|
|
GstClockTimeDiff base_time_difference;
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"looks like we have a discont, this pcr should really be approx: %"
|
|
G_GUINT64_FORMAT, stream->last_PCR + stream->last_PCR_difference);
|
|
if (stream->discont_PCR == FALSE) {
|
|
if (pcr > stream->last_PCR) {
|
|
base_time_difference = -MPEGTIME_TO_GSTTIME ((pcr -
|
|
(stream->last_PCR + stream->last_PCR_difference)));
|
|
} else {
|
|
base_time_difference = MPEGTIME_TO_GSTTIME ((stream->last_PCR +
|
|
stream->last_PCR_difference) - pcr);
|
|
}
|
|
stream->discont_PCR = TRUE;
|
|
stream->discont_difference = base_time_difference;
|
|
valid_pcr = FALSE;
|
|
} else {
|
|
GstClockTimeDiff base_time_difference;
|
|
|
|
/* need to update all pmt streams in case this pcr is pcr
|
|
* for multiple programs */
|
|
int j;
|
|
gboolean *pmts_checked = (gboolean *) & demux->pmts_checked;
|
|
memset (pmts_checked, 0, sizeof (gboolean) * (MPEGTS_MAX_PID + 1));
|
|
|
|
for (j = 0; j < MPEGTS_MAX_PID + 1; j++) {
|
|
if (demux->streams[j]
|
|
&& demux->streams[j]->PMT_pid <= MPEGTS_MAX_PID) {
|
|
if (!pmts_checked[demux->streams[j]->PMT_pid]) {
|
|
/* check if this is correct pcr for pmt */
|
|
if (demux->streams[demux->streams[j]->PMT_pid] &&
|
|
stream->PID ==
|
|
demux->streams[demux->streams[j]->PMT_pid]->PMT.PCR_PID) {
|
|
/* checking the pcr discont is similar this second time
|
|
* if similar, update the es pids
|
|
* if not, assume it's a false discont due to corruption
|
|
* or other */
|
|
if (pcr > stream->last_PCR) {
|
|
base_time_difference = -MPEGTIME_TO_GSTTIME ((pcr -
|
|
(stream->last_PCR + stream->last_PCR_difference)));
|
|
} else {
|
|
base_time_difference =
|
|
MPEGTIME_TO_GSTTIME ((stream->last_PCR +
|
|
stream->last_PCR_difference) - pcr);
|
|
}
|
|
if ((base_time_difference - stream->discont_difference > 0 &&
|
|
base_time_difference - stream->discont_difference <
|
|
GST_SECOND * 10) ||
|
|
(stream->discont_difference - base_time_difference > 0 &&
|
|
stream->discont_difference - base_time_difference <
|
|
GST_SECOND * 10)) {
|
|
pmt_stream = demux->streams[demux->streams[j]->PMT_pid];
|
|
GST_DEBUG_OBJECT (demux, "Updating base_time on all es "
|
|
"pids belonging to PMT 0x%02x", stream->PMT_pid);
|
|
for (i = 0; i <= pmt_stream->PMT.entries->len; i++) {
|
|
GstMpegTSPMTEntry *cur_entry =
|
|
&g_array_index (pmt_stream->PMT.entries,
|
|
GstMpegTSPMTEntry, i);
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Updating base time on " "pid 0x%02x by %"
|
|
G_GINT64_FORMAT, cur_entry->PID,
|
|
stream->discont_difference);
|
|
if (cur_entry->PID <= MPEGTS_MAX_PID
|
|
&& demux->streams[cur_entry->PID]) {
|
|
demux->streams[cur_entry->PID]->base_time +=
|
|
stream->discont_difference;
|
|
}
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux, "last PCR discont looked to be "
|
|
"bogus: previous discont difference %" G_GINT64_FORMAT
|
|
" now %" G_GINT64_FORMAT, stream->discont_difference,
|
|
base_time_difference);
|
|
valid_pcr = FALSE;
|
|
}
|
|
}
|
|
}
|
|
pmts_checked[demux->streams[j]->PMT_pid] = TRUE;
|
|
}
|
|
}
|
|
|
|
stream->discont_PCR = FALSE;
|
|
stream->discont_difference = 0;
|
|
}
|
|
} else if (stream->last_PCR != -1) {
|
|
if (stream->discont_PCR) {
|
|
GST_DEBUG_OBJECT (demux, "last PCR discont looked to be bogus");
|
|
stream->discont_PCR = FALSE;
|
|
stream->discont_difference = 0;
|
|
}
|
|
stream->last_PCR_difference = pcr - stream->last_PCR;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"valid pcr: %d last PCR difference: %" G_GUINT64_FORMAT, valid_pcr,
|
|
stream->last_PCR_difference);
|
|
if (valid_pcr) {
|
|
GstMpegTSStream *PMT_stream = demux->streams[demux->current_PMT];
|
|
|
|
if (PMT_stream && PMT_stream->PMT.PCR_PID == stream->PID) {
|
|
if (demux->pcr[0] == -1) {
|
|
GST_DEBUG ("RECORDING pcr[0]:%" G_GUINT64_FORMAT, pcr);
|
|
demux->pcr[0] = pcr;
|
|
demux->num_packets = 0;
|
|
} /* Considering a difference of 1 sec ie 90000 ticks */
|
|
else if (G_UNLIKELY (demux->pcr[1] == -1
|
|
&& ((pcr - demux->pcr[0]) >= 90000))) {
|
|
GST_DEBUG ("RECORDING pcr[1]:%" G_GUINT64_FORMAT, pcr);
|
|
demux->pcr[1] = pcr;
|
|
}
|
|
}
|
|
stream->last_PCR = pcr;
|
|
|
|
if (demux->clock && demux->clock_base != GST_CLOCK_TIME_NONE) {
|
|
gdouble r_squared;
|
|
GstMpegTSStream *PMT_stream;
|
|
|
|
/* for the reference start time we need to consult the PCR_PID of the
|
|
* current PMT */
|
|
PMT_stream = demux->streams[demux->current_PMT];
|
|
if (PMT_stream->PMT.PCR_PID == stream->PID) {
|
|
GST_LOG_OBJECT (demux,
|
|
"internal %" GST_TIME_FORMAT " observation %" GST_TIME_FORMAT
|
|
" pcr: %" G_GUINT64_FORMAT " base_pcr: %" G_GUINT64_FORMAT
|
|
"pid: %d",
|
|
GST_TIME_ARGS (gst_clock_get_internal_time (demux->clock)),
|
|
GST_TIME_ARGS (MPEGTIME_TO_GSTTIME (pcr) -
|
|
MPEGTIME_TO_GSTTIME (stream->base_PCR) + stream->base_time +
|
|
demux->clock_base), pcr, stream->base_PCR, stream->PID);
|
|
gst_clock_add_observation (demux->clock,
|
|
gst_clock_get_internal_time (demux->clock),
|
|
demux->clock_base + stream->base_time +
|
|
MPEGTIME_TO_GSTTIME (pcr) -
|
|
MPEGTIME_TO_GSTTIME (stream->base_PCR), &r_squared);
|
|
}
|
|
}
|
|
}
|
|
data += 6;
|
|
}
|
|
/* OPCR_flag */
|
|
if (flags & 0x08) {
|
|
guint32 opcr1;
|
|
guint16 opcr2;
|
|
guint64 opcr, opcr_ext;
|
|
|
|
opcr1 = GST_READ_UINT32_BE (data);
|
|
opcr2 = GST_READ_UINT16_BE (data + 4);
|
|
opcr = ((guint64) opcr1) << 1;
|
|
opcr |= (opcr2 & 0x8000) >> 15;
|
|
opcr_ext = (opcr2 & 0x01ff);
|
|
if (opcr_ext)
|
|
opcr = (opcr * 300 + opcr_ext % 300) / 300;
|
|
GST_DEBUG_OBJECT (demux, "have OPCR %" G_GUINT64_FORMAT " on PID 0x%04x",
|
|
opcr, stream->PID);
|
|
stream->last_OPCR = opcr;
|
|
data += 6;
|
|
}
|
|
/* splicing_point_flag */
|
|
if (flags & 0x04) {
|
|
guint8 splice_countdown;
|
|
|
|
splice_countdown = *data++;
|
|
GST_DEBUG_OBJECT (demux, "have splicing point, countdown %d",
|
|
splice_countdown);
|
|
}
|
|
/* transport_private_data_flag */
|
|
if (flags & 0x02) {
|
|
guint8 plength = *data++;
|
|
|
|
if (data + plength > data_end)
|
|
goto private_data_too_large;
|
|
|
|
GST_DEBUG_OBJECT (demux, "have private data, length: %d", plength);
|
|
data += plength;
|
|
}
|
|
/* adaptation_field_extension_flag */
|
|
if (flags & 0x01) {
|
|
GST_DEBUG_OBJECT (demux, "have field extension");
|
|
}
|
|
}
|
|
|
|
*consumed = length + 1;
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
wrong_length:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "length %d > %d", length, data_len);
|
|
return FALSE;
|
|
}
|
|
private_data_too_large:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "have too large a private data length");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* program_association_section() {
|
|
* table_id 8 uimsbf == 0x00
|
|
* section_syntax_indicator 1 bslbf == 1
|
|
* '0' 1 bslbf == 0
|
|
* reserved 2 bslbf
|
|
* section_length 12 uimsbf == 00xxxxx...
|
|
* transport_stream_id 16 uimsbf
|
|
* reserved 2 bslbf
|
|
* version_number 5 uimsbf
|
|
* current_next_indicator 1 bslbf
|
|
* section_number 8 uimsbf
|
|
* last_section_number 8 uimsbf
|
|
* for (i=0; i<N;i++) {
|
|
* program_number 16 uimsbf
|
|
* reserved 3 bslbf
|
|
* if(program_number == '0') {
|
|
* network_PID 13 uimsbf
|
|
* }
|
|
* else {
|
|
* program_map_PID 13 uimsbf
|
|
* }
|
|
* }
|
|
* CRC_32 32 rpchof
|
|
* }
|
|
*/
|
|
static FORCE_INLINE gboolean
|
|
gst_mpegts_stream_parse_pat (GstMpegTSStream * stream,
|
|
guint8 * data, guint datalen)
|
|
{
|
|
GstMpegTSDemux *demux;
|
|
gint entries;
|
|
guint32 CRC;
|
|
guint version_number;
|
|
guint8 current_next_indicator;
|
|
GstMpegTSPAT *PAT;
|
|
|
|
demux = stream->demux;
|
|
|
|
if (datalen < 8)
|
|
return FALSE;
|
|
|
|
if (*data++ != 0x00)
|
|
goto wrong_id;
|
|
if ((data[0] & 0xc0) != 0x80)
|
|
goto wrong_sync;
|
|
if (G_UNLIKELY ((data[0] & 0x0c) != 0x00))
|
|
goto wrong_seclen;
|
|
|
|
data += 2;
|
|
GST_DEBUG_OBJECT (demux, "PAT section_length: %d", datalen - 3);
|
|
|
|
if (demux->check_crc)
|
|
if (gst_mpegts_demux_calc_crc32 (data - 3, datalen) != 0)
|
|
goto wrong_crc;
|
|
|
|
PAT = &stream->PAT;
|
|
|
|
version_number = (data[2] & 0x3e) >> 1;
|
|
GST_DEBUG_OBJECT (demux, "PAT version_number: %d", version_number);
|
|
if (G_UNLIKELY (version_number == PAT->version_number))
|
|
goto same_version;
|
|
|
|
current_next_indicator = (data[2] & 0x01);
|
|
GST_DEBUG_OBJECT (demux, "PAT current_next_indicator %d",
|
|
current_next_indicator);
|
|
if (current_next_indicator == 0)
|
|
goto not_yet_applicable;
|
|
|
|
PAT->version_number = version_number;
|
|
PAT->current_next_indicator = current_next_indicator;
|
|
|
|
PAT->transport_stream_id = GST_READ_UINT16_BE (data);
|
|
data += 3;
|
|
GST_DEBUG_OBJECT (demux, "PAT stream_id: %d", PAT->transport_stream_id);
|
|
|
|
PAT->section_number = *data++;
|
|
PAT->last_section_number = *data++;
|
|
|
|
GST_DEBUG_OBJECT (demux, "PAT current_next_indicator: %d",
|
|
PAT->current_next_indicator);
|
|
GST_DEBUG_OBJECT (demux, "PAT section_number: %d", PAT->section_number);
|
|
GST_DEBUG_OBJECT (demux, "PAT last_section_number: %d",
|
|
PAT->last_section_number);
|
|
|
|
/* 5 bytes after section length and a 4 bytes CRC,
|
|
* the rest is 4 byte entries */
|
|
entries = (datalen - 3 - 9) / 4;
|
|
|
|
if (PAT->entries)
|
|
g_array_free (PAT->entries, TRUE);
|
|
PAT->entries =
|
|
g_array_sized_new (FALSE, TRUE, sizeof (GstMpegTSPATEntry), entries);
|
|
|
|
while (entries--) {
|
|
GstMpegTSPATEntry entry;
|
|
GstMpegTSStream *PMT_stream;
|
|
|
|
entry.program_number = GST_READ_UINT16_BE (data);
|
|
data += 2;
|
|
entry.PID = GST_READ_UINT16_BE (data);
|
|
entry.PID &= 0x1fff;
|
|
data += 2;
|
|
|
|
/* get/create stream for PMT */
|
|
PMT_stream = gst_mpegts_demux_get_stream_for_PID (demux, entry.PID);
|
|
if (PMT_stream->PID_type != PID_TYPE_PROGRAM_MAP) {
|
|
/* set as program map */
|
|
PMT_stream->PID_type = PID_TYPE_PROGRAM_MAP;
|
|
/* initialise section filter */
|
|
gst_section_filter_init (&PMT_stream->section_filter);
|
|
}
|
|
|
|
g_array_append_val (PAT->entries, entry);
|
|
|
|
GST_DEBUG_OBJECT (demux, " PAT program: %d, PID 0x%04x",
|
|
entry.program_number, entry.PID);
|
|
}
|
|
CRC = GST_READ_UINT32_BE (data);
|
|
GST_DEBUG_OBJECT (demux, "PAT CRC: 0x%08x", CRC);
|
|
|
|
/* PAT has been updated, signal the change */
|
|
g_object_notify ((GObject *) (demux), "pat-info");
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
wrong_crc:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "wrong crc");
|
|
return FALSE;
|
|
}
|
|
same_version:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "same version as existing PAT");
|
|
return TRUE;
|
|
}
|
|
not_yet_applicable:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "Ignoring PAT with current_next_indicator = 0");
|
|
return TRUE;
|
|
}
|
|
wrong_id:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "expected table_id == 0, got %02x", data[0]);
|
|
return FALSE;
|
|
}
|
|
wrong_sync:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "expected sync 10, got %02x", data[0]);
|
|
return FALSE;
|
|
}
|
|
wrong_seclen:
|
|
{
|
|
GST_DEBUG_OBJECT (demux,
|
|
"first two bits of section length must be 0, got %02x", data[0]);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_is_PMT (GstMpegTSDemux * demux, guint16 PID)
|
|
{
|
|
GstMpegTSStream *stream;
|
|
GstMpegTSPAT *PAT;
|
|
gint i;
|
|
|
|
/* get the PAT */
|
|
stream = demux->streams[PID_PROGRAM_ASSOCIATION_TABLE];
|
|
if (stream == NULL || stream->PAT.entries == NULL)
|
|
return FALSE;
|
|
|
|
PAT = &stream->PAT;
|
|
|
|
for (i = 0; i < PAT->entries->len; i++) {
|
|
GstMpegTSPATEntry *entry;
|
|
|
|
entry = &g_array_index (PAT->entries, GstMpegTSPATEntry, i);
|
|
if (!entry)
|
|
continue;
|
|
|
|
if (entry->PID == PID)
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static FORCE_INLINE GstFlowReturn
|
|
gst_mpegts_stream_pes_buffer_flush (GstMpegTSStream * stream, gboolean discard)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
if (stream->pes_buffer) {
|
|
if (discard) {
|
|
gst_buffer_unref (stream->pes_buffer);
|
|
stream->pes_buffer_in_sync = FALSE;
|
|
} else {
|
|
GST_BUFFER_SIZE (stream->pes_buffer) = stream->pes_buffer_used;
|
|
ret = gst_pes_filter_push (&stream->filter, stream->pes_buffer);
|
|
if (ret == GST_FLOW_LOST_SYNC)
|
|
stream->pes_buffer_in_sync = FALSE;
|
|
}
|
|
stream->pes_buffer = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static FORCE_INLINE GstFlowReturn
|
|
gst_mpegts_stream_pes_buffer_push (GstMpegTSStream * stream,
|
|
const guint8 * in_data, guint in_size)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
guint8 *out_data;
|
|
|
|
if (G_UNLIKELY (stream->pes_buffer
|
|
&& stream->pes_buffer_used + in_size > stream->pes_buffer_size)) {
|
|
GST_DEBUG ("stream with PID 0x%04x have PES buffer full at %u bytes."
|
|
" Flushing and growing the buffer",
|
|
stream->PID, stream->pes_buffer_size);
|
|
stream->pes_buffer_overflow = TRUE;
|
|
if (stream->pes_buffer_size < (MPEGTS_MAX_PES_BUFFER_SIZE >> 1))
|
|
stream->pes_buffer_size <<= 1;
|
|
|
|
ret = gst_mpegts_stream_pes_buffer_flush (stream, FALSE);
|
|
if (ret == GST_FLOW_LOST_SYNC)
|
|
goto done;
|
|
}
|
|
|
|
if (G_UNLIKELY (!stream->pes_buffer)) {
|
|
/* set initial size of PES buffer */
|
|
if (G_UNLIKELY (stream->pes_buffer_size == 0))
|
|
stream->pes_buffer_size = MPEGTS_MIN_PES_BUFFER_SIZE;
|
|
|
|
stream->pes_buffer = gst_buffer_new_and_alloc (stream->pes_buffer_size);
|
|
stream->pes_buffer_used = 0;
|
|
}
|
|
out_data = GST_BUFFER_DATA (stream->pes_buffer) + stream->pes_buffer_used;
|
|
oil_memcpy (out_data, in_data, in_size);
|
|
stream->pes_buffer_used += in_size;
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
static FORCE_INLINE GstFlowReturn
|
|
gst_mpegts_demux_pes_buffer_flush (GstMpegTSDemux * demux, gboolean discard)
|
|
{
|
|
gint i;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
for (i = 0; i < MPEGTS_MAX_PID + 1; i++) {
|
|
GstMpegTSStream *stream = demux->streams[i];
|
|
if (stream && stream->pad) {
|
|
gst_mpegts_stream_pes_buffer_flush (stream, discard);
|
|
stream->pes_buffer_in_sync = FALSE;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static FORCE_INLINE GstFlowReturn
|
|
gst_mpegts_demux_push_fragment (GstMpegTSStream * stream,
|
|
const guint8 * in_data, guint in_size)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstBuffer *es_buf = gst_buffer_new_and_alloc (in_size);
|
|
oil_memcpy (GST_BUFFER_DATA (es_buf), in_data, in_size);
|
|
ret = gst_pes_filter_push (&stream->filter, es_buf);
|
|
|
|
/* If PES filter return ok then PES fragment buffering
|
|
* can be enabled */
|
|
if (ret == GST_FLOW_OK)
|
|
stream->pes_buffer_in_sync = TRUE;
|
|
else if (ret == GST_FLOW_LOST_SYNC)
|
|
stream->pes_buffer_in_sync = FALSE;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* transport_packet(){
|
|
* sync_byte 8 bslbf == 0x47
|
|
* transport_error_indicator 1 bslbf
|
|
* payload_unit_start_indicator 1 bslbf
|
|
* transport _priority 1 bslbf
|
|
* PID 13 uimsbf
|
|
* transport_scrambling_control 2 bslbf
|
|
* adaptation_field_control 2 bslbf
|
|
* continuity_counter 4 uimsbf
|
|
* if(adaptation_field_control=='10' || adaptation_field_control=='11'){
|
|
* adaptation_field()
|
|
* }
|
|
* if(adaptation_field_control=='01' || adaptation_field_control=='11') {
|
|
* for (i=0;i<N;i++){
|
|
* data_byte 8 bslbf
|
|
* }
|
|
* }
|
|
* }
|
|
*/
|
|
static FORCE_INLINE GstFlowReturn
|
|
gst_mpegts_demux_parse_stream (GstMpegTSDemux * demux, GstMpegTSStream * stream,
|
|
const guint8 * in_data, guint in_size)
|
|
{
|
|
GstFlowReturn ret;
|
|
gboolean transport_error_indicator;
|
|
gboolean payload_unit_start_indicator;
|
|
gboolean transport_priority;
|
|
guint16 PID;
|
|
guint8 transport_scrambling_control;
|
|
guint8 adaptation_field_control;
|
|
guint8 continuity_counter;
|
|
const guint8 *data = in_data;
|
|
guint datalen = in_size;
|
|
|
|
transport_error_indicator = (data[0] & 0x80) == 0x80;
|
|
payload_unit_start_indicator = (data[0] & 0x40) == 0x40;
|
|
transport_priority = (data[0] & 0x20) == 0x20;
|
|
PID = stream->PID;
|
|
transport_scrambling_control = (data[2] & 0xc0) >> 6;
|
|
adaptation_field_control = (data[2] & 0x30) >> 4;
|
|
continuity_counter = data[2] & 0x0f;
|
|
|
|
data += 3;
|
|
datalen -= 3;
|
|
|
|
GST_LOG_OBJECT (demux, "afc 0x%x, pusi %d, PID 0x%04x datalen %u",
|
|
adaptation_field_control, payload_unit_start_indicator, PID, datalen);
|
|
|
|
ret = GST_FLOW_OK;
|
|
|
|
/* packets with adaptation_field_control == 0 must be skipped */
|
|
if (adaptation_field_control == 0)
|
|
goto skip;
|
|
|
|
/* parse adaption field if any */
|
|
if (adaptation_field_control & 0x2) {
|
|
guint consumed;
|
|
|
|
if (!gst_mpegts_demux_parse_adaptation_field (stream, data,
|
|
datalen, &consumed))
|
|
goto done;
|
|
|
|
if (datalen <= consumed)
|
|
goto too_small;
|
|
|
|
data += consumed;
|
|
datalen -= consumed;
|
|
GST_LOG_OBJECT (demux, "consumed: %u datalen: %u", consumed, datalen);
|
|
}
|
|
|
|
/* If this packet has a payload, handle it */
|
|
if (adaptation_field_control & 0x1) {
|
|
GST_LOG_OBJECT (demux, "Packet payload %d bytes, PID 0x%04x", datalen, PID);
|
|
|
|
/* For unknown streams, check if the PID is in the partial PIDs
|
|
* list as an elementary stream and override the type if so
|
|
*/
|
|
if (G_UNLIKELY (stream->PID_type == PID_TYPE_UNKNOWN)) {
|
|
if (mpegts_is_elem_pid (demux, PID)) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"PID 0x%04x is an elementary stream in the PID list", PID);
|
|
stream->PID_type = PID_TYPE_ELEMENTARY;
|
|
stream->flags |= MPEGTS_STREAM_FLAG_STREAM_TYPE_UNKNOWN;
|
|
stream->base_time = 0;
|
|
stream->last_time = 0;
|
|
|
|
/* Clear any existing descriptor */
|
|
if (stream->ES_info) {
|
|
gst_mpeg_descriptor_free (stream->ES_info);
|
|
stream->ES_info = NULL;
|
|
}
|
|
|
|
/* Initialise our PES filter */
|
|
gst_pes_filter_init (&stream->filter, NULL, NULL);
|
|
gst_pes_filter_set_callbacks (&stream->filter,
|
|
(GstPESFilterData) gst_mpegts_demux_data_cb,
|
|
(GstPESFilterResync) gst_mpegts_demux_resync_cb, stream);
|
|
}
|
|
}
|
|
|
|
/* now parse based on the stream type */
|
|
switch (stream->PID_type) {
|
|
case PID_TYPE_PROGRAM_ASSOCIATION:
|
|
case PID_TYPE_CONDITIONAL_ACCESS:
|
|
case PID_TYPE_PROGRAM_MAP:
|
|
case PID_TYPE_PRIVATE_SECTION:
|
|
{
|
|
GstBuffer *sec_buf;
|
|
guint8 *section_data;
|
|
guint16 section_length;
|
|
guint8 pointer;
|
|
|
|
/* do stuff with our section */
|
|
if (payload_unit_start_indicator) {
|
|
pointer = *data++;
|
|
datalen -= 1;
|
|
if (pointer >= datalen) {
|
|
GST_DEBUG_OBJECT (demux, "pointer: 0x%02x too large", pointer);
|
|
return GST_FLOW_OK;
|
|
}
|
|
data += pointer;
|
|
datalen -= pointer;
|
|
}
|
|
|
|
/* FIXME: try to use data directly instead of creating a buffer and
|
|
pushing in into adapter at section filter */
|
|
sec_buf = gst_buffer_new_and_alloc (datalen);
|
|
oil_memcpy (GST_BUFFER_DATA (sec_buf), data, datalen);
|
|
if (gst_section_filter_push (&stream->section_filter,
|
|
payload_unit_start_indicator, continuity_counter, sec_buf)) {
|
|
GST_DEBUG_OBJECT (demux, "section finished");
|
|
/* section ready */
|
|
section_length = stream->section_filter.section_length;
|
|
section_data =
|
|
(guint8 *) gst_adapter_peek (stream->section_filter.adapter,
|
|
section_length + 3);
|
|
|
|
switch (stream->PID_type) {
|
|
case PID_TYPE_PROGRAM_ASSOCIATION:
|
|
gst_mpegts_stream_parse_pat (stream, section_data,
|
|
section_length + 3);
|
|
break;
|
|
case PID_TYPE_CONDITIONAL_ACCESS:
|
|
gst_mpegts_stream_parse_cat (stream, section_data,
|
|
section_length + 3);
|
|
break;
|
|
case PID_TYPE_PROGRAM_MAP:
|
|
gst_mpegts_stream_parse_pmt (stream, section_data,
|
|
section_length + 3);
|
|
break;
|
|
case PID_TYPE_PRIVATE_SECTION:
|
|
gst_mpegts_stream_parse_private_section (stream, section_data,
|
|
section_length + 3);
|
|
break;
|
|
}
|
|
|
|
gst_section_filter_clear (&stream->section_filter);
|
|
|
|
} else {
|
|
/* section still going, don't parse left */
|
|
GST_DEBUG_OBJECT (demux, "section still going for PID 0x%04x", PID);
|
|
}
|
|
break;
|
|
}
|
|
case PID_TYPE_NULL_PACKET:
|
|
GST_DEBUG_OBJECT (demux,
|
|
"skipping PID 0x%04x, type 0x%04x (NULL packet)", PID,
|
|
stream->PID_type);
|
|
break;
|
|
case PID_TYPE_UNKNOWN:
|
|
GST_DEBUG_OBJECT (demux, "skipping unknown PID 0x%04x, type 0x%04x",
|
|
PID, stream->PID_type);
|
|
break;
|
|
case PID_TYPE_ELEMENTARY:
|
|
{
|
|
if (payload_unit_start_indicator) {
|
|
GST_DEBUG_OBJECT (demux, "new PES start for PID 0x%04x, used %u"
|
|
"bytes of %u bytes in the PES buffer",
|
|
PID, stream->pes_buffer_used, stream->pes_buffer_size);
|
|
/* Flush buffered PES data */
|
|
gst_mpegts_stream_pes_buffer_flush (stream, FALSE);
|
|
gst_pes_filter_drain (&stream->filter);
|
|
/* Resize the buffer to half if no overflow detected and
|
|
* had been used less than half of it */
|
|
if (stream->pes_buffer_overflow == FALSE
|
|
&& stream->pes_buffer_used < (stream->pes_buffer_size >> 1)) {
|
|
stream->pes_buffer_size >>= 1;
|
|
if (stream->pes_buffer_size < MPEGTS_MIN_PES_BUFFER_SIZE)
|
|
stream->pes_buffer_size = MPEGTS_MIN_PES_BUFFER_SIZE;
|
|
GST_DEBUG_OBJECT (demux, "PES buffer size reduced to %u bytes",
|
|
stream->pes_buffer_size);
|
|
}
|
|
/* mark the stream not in sync to give a chance on PES filter to
|
|
* detect lost sync */
|
|
stream->pes_buffer_in_sync = FALSE;
|
|
stream->pes_buffer_overflow = FALSE;
|
|
}
|
|
GST_LOG_OBJECT (demux, "Elementary packet of size %u for PID 0x%04x",
|
|
datalen, PID);
|
|
|
|
if (datalen > 0) {
|
|
if (!stream->pes_buffer_in_sync) {
|
|
/* Push the first fragment to PES filter to have a chance to
|
|
* detect GST_FLOW_LOST_SYNC.
|
|
*/
|
|
GST_LOG_OBJECT (demux, "fragment directly pushed to PES filter");
|
|
ret = gst_mpegts_demux_push_fragment (stream, data, datalen);
|
|
} else {
|
|
/* Otherwhise we buffer the PES fragment */
|
|
ret = gst_mpegts_stream_pes_buffer_push (stream, data, datalen);
|
|
/* If sync is lost here is due a pes_buffer_flush and we can try
|
|
* to resync in the PES filter with the current fragment
|
|
*/
|
|
if (ret == GST_FLOW_LOST_SYNC) {
|
|
GST_LOG_OBJECT (demux, "resync, fragment pushed to PES filter");
|
|
ret = gst_mpegts_demux_push_fragment (stream, data, datalen);
|
|
}
|
|
}
|
|
|
|
break;
|
|
} else {
|
|
GST_WARNING_OBJECT (demux, "overflow of datalen: %u so skipping",
|
|
datalen);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
done:
|
|
return ret;
|
|
|
|
skip:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "skipping, adaptation_field_control == 0");
|
|
return GST_FLOW_OK;
|
|
}
|
|
too_small:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "skipping, adaptation_field consumed all data");
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static FORCE_INLINE GstFlowReturn
|
|
gst_mpegts_demux_parse_transport_packet (GstMpegTSDemux * demux,
|
|
const guint8 * data)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
guint16 PID;
|
|
GstMpegTSStream *stream;
|
|
|
|
/* skip sync byte */
|
|
data++;
|
|
|
|
/* get PID */
|
|
PID = ((data[0] & 0x1f) << 8) | data[1];
|
|
|
|
/* Skip NULL packets */
|
|
if (G_UNLIKELY (PID == 0x1fff))
|
|
goto beach;
|
|
|
|
/* get the stream. */
|
|
stream = gst_mpegts_demux_get_stream_for_PID (demux, PID);
|
|
|
|
/* parse the stream */
|
|
ret = gst_mpegts_demux_parse_stream (demux, stream, data,
|
|
MPEGTS_NORMAL_TS_PACKETSIZE - 1);
|
|
|
|
if (demux->pcr[1] != -1 && demux->bitrate == -1) {
|
|
guint64 bitrate;
|
|
GST_DEBUG_OBJECT (demux, "pcr[0]:%" G_GUINT64_FORMAT, demux->pcr[0]);
|
|
GST_DEBUG_OBJECT (demux, "pcr[1]:%" G_GUINT64_FORMAT, demux->pcr[1]);
|
|
GST_DEBUG_OBJECT (demux, "diff in time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (MPEGTIME_TO_GSTTIME (demux->pcr[1] - demux->pcr[0])));
|
|
GST_DEBUG_OBJECT (demux, "stream->last_PCR_difference: %" G_GUINT64_FORMAT
|
|
", demux->num_packets %" G_GUINT64_FORMAT,
|
|
demux->pcr[1] - demux->pcr[0], demux->num_packets);
|
|
bitrate = gst_util_uint64_scale (GST_SECOND,
|
|
MPEGTS_NORMAL_TS_PACKETSIZE * demux->num_packets,
|
|
MPEGTIME_TO_GSTTIME (demux->pcr[1] - demux->pcr[0]));
|
|
/* somehow... I doubt a bitrate below one packet per second is valid */
|
|
if (bitrate > MPEGTS_NORMAL_TS_PACKETSIZE - 1) {
|
|
demux->bitrate = bitrate;
|
|
GST_DEBUG_OBJECT (demux, "bitrate is %" G_GINT64_FORMAT
|
|
" bytes per second", demux->bitrate);
|
|
} else {
|
|
GST_WARNING_OBJECT (demux, "Couldn't compute valid bitrate, recomputing");
|
|
demux->pcr[0] = demux->pcr[1] = -1;
|
|
demux->num_packets = -1;
|
|
}
|
|
}
|
|
|
|
beach:
|
|
demux->num_packets++;
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_handle_seek_push (GstMpegTSDemux * demux, GstEvent * event)
|
|
{
|
|
gboolean res = FALSE;
|
|
gdouble rate;
|
|
GstFormat format;
|
|
GstSeekFlags flags;
|
|
GstSeekType start_type, stop_type;
|
|
gint64 start, stop, bstart, bstop;
|
|
GstEvent *bevent;
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
|
|
&stop_type, &stop);
|
|
|
|
GST_DEBUG_OBJECT (demux, "seek event, rate: %f start: %" GST_TIME_FORMAT
|
|
" stop: %" GST_TIME_FORMAT, rate, GST_TIME_ARGS (start),
|
|
GST_TIME_ARGS (stop));
|
|
|
|
if (format == GST_FORMAT_BYTES) {
|
|
GST_DEBUG_OBJECT (demux, "seek not supported on format %d", format);
|
|
goto beach;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "seek - trying directly upstream first");
|
|
|
|
/* first try original format seek */
|
|
res = gst_pad_push_event (demux->sinkpad, gst_event_ref (event));
|
|
if (res == TRUE)
|
|
goto beach;
|
|
GST_DEBUG_OBJECT (demux, "seek - no upstream");
|
|
|
|
if (format != GST_FORMAT_TIME) {
|
|
/* From here down, we only support time based seeks */
|
|
GST_DEBUG_OBJECT (demux, "seek not supported on format %d", format);
|
|
goto beach;
|
|
}
|
|
|
|
/* We need to convert to byte based seek and we need a scr_rate for that. */
|
|
if (demux->bitrate == -1) {
|
|
GST_DEBUG_OBJECT (demux, "seek not possible, no bitrate");
|
|
goto beach;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "try with bitrate");
|
|
|
|
bstart = GSTTIME_TO_BYTES (start);
|
|
bstop = GSTTIME_TO_BYTES (stop);
|
|
|
|
GST_DEBUG_OBJECT (demux, "in bytes bstart %" G_GINT64_FORMAT " bstop %"
|
|
G_GINT64_FORMAT, bstart, bstop);
|
|
bevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags, start_type,
|
|
bstart, stop_type, bstop);
|
|
|
|
res = gst_pad_push_event (demux->sinkpad, bevent);
|
|
|
|
beach:
|
|
gst_event_unref (event);
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_src_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (gst_pad_get_parent (pad));
|
|
gboolean res = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (demux, "got event %s",
|
|
gst_event_type_get_name (GST_EVENT_TYPE (event)));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEEK:
|
|
res = gst_mpegts_demux_handle_seek_push (demux, event);
|
|
break;
|
|
default:
|
|
res = gst_pad_push_event (demux->sinkpad, event);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (demux);
|
|
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
gst_mpegts_demux_flush (GstMpegTSDemux * demux, gboolean discard)
|
|
{
|
|
gint i;
|
|
GstMpegTSStream *PCR_stream;
|
|
GstMpegTSStream *PMT_stream;
|
|
|
|
GST_DEBUG_OBJECT (demux, "flushing MPEG TS demuxer (discard %d)", discard);
|
|
|
|
/* Start by flushing internal buffers */
|
|
gst_mpegts_demux_pes_buffer_flush (demux, discard);
|
|
|
|
/* Clear adapter */
|
|
gst_adapter_clear (demux->adapter);
|
|
|
|
/* Try resetting the last_PCR value as we will have a discont */
|
|
if (demux->current_PMT == 0)
|
|
goto beach;
|
|
|
|
PMT_stream = demux->streams[demux->current_PMT];
|
|
if (PMT_stream == NULL)
|
|
goto beach;
|
|
|
|
PCR_stream = demux->streams[PMT_stream->PMT.PCR_PID];
|
|
if (PCR_stream == NULL)
|
|
goto beach;
|
|
|
|
PCR_stream->last_PCR = -1;
|
|
|
|
/* Reset last time of all streams */
|
|
for (i = 0; i < MPEGTS_MAX_PID + 1; i++) {
|
|
GstMpegTSStream *stream = demux->streams[i];
|
|
|
|
if (stream) {
|
|
stream->last_time = 0;
|
|
stream->discont = TRUE;
|
|
}
|
|
}
|
|
|
|
|
|
beach:
|
|
return;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_send_event (GstMpegTSDemux * demux, GstEvent * event)
|
|
{
|
|
gint i;
|
|
gboolean have_stream = FALSE, res = TRUE;
|
|
|
|
for (i = 0; i < MPEGTS_MAX_PID + 1; i++) {
|
|
GstMpegTSStream *stream = demux->streams[i];
|
|
|
|
if (stream && stream->pad) {
|
|
res &= gst_pad_push_event (stream->pad, gst_event_ref (event));
|
|
have_stream = TRUE;
|
|
}
|
|
}
|
|
gst_event_unref (event);
|
|
|
|
return have_stream;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_sink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (gst_pad_get_parent (pad));
|
|
gboolean res = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (demux, "got event %s",
|
|
gst_event_type_get_name (GST_EVENT_TYPE (event)));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
res = gst_mpegts_demux_send_event (demux, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
gst_adapter_clear (demux->adapter);
|
|
gst_mpegts_demux_flush (demux, TRUE);
|
|
res = gst_mpegts_demux_send_event (demux, event);
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
gst_mpegts_demux_flush (demux, FALSE);
|
|
/* Send the EOS event on each stream */
|
|
if (!(res = gst_mpegts_demux_send_event (demux, event))) {
|
|
/* we have no streams */
|
|
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND,
|
|
(NULL), ("No valid streams found at EOS"));
|
|
}
|
|
break;
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
gboolean update;
|
|
gdouble rate;
|
|
GstFormat format;
|
|
gint64 start, stop, time;
|
|
|
|
gst_event_parse_new_segment (event, &update, &rate, &format,
|
|
&start, &stop, &time);
|
|
|
|
gst_event_unref (event);
|
|
GST_INFO_OBJECT (demux, "received new segment: rate %g "
|
|
"format %d, start: %" G_GINT64_FORMAT ", stop: %" G_GINT64_FORMAT
|
|
", time: %" G_GINT64_FORMAT, rate, format, start, stop, time);
|
|
if (format == GST_FORMAT_BYTES && demux->bitrate != -1) {
|
|
gint64 tstart = 0, tstop = 0, pos = 0;
|
|
|
|
if (demux->base_pts != GST_CLOCK_TIME_NONE) {
|
|
tstart = tstop = demux->base_pts;
|
|
}
|
|
tstart += BYTES_TO_GSTTIME (start);
|
|
tstop += BYTES_TO_GSTTIME (stop);
|
|
pos = BYTES_TO_GSTTIME (time);
|
|
|
|
event = gst_event_new_new_segment (update, rate,
|
|
GST_FORMAT_TIME, tstart, tstop, pos);
|
|
GST_DEBUG_OBJECT (demux, "pushing time newsegment from %"
|
|
GST_TIME_FORMAT " to %" GST_TIME_FORMAT " pos %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (tstart), GST_TIME_ARGS (tstop), GST_TIME_ARGS (pos));
|
|
|
|
res = gst_mpegts_demux_send_event (demux, event);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_mpegts_demux_send_event (demux, event);
|
|
break;
|
|
}
|
|
gst_object_unref (demux);
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_provides_clock (GstElement * element)
|
|
{
|
|
GstMpegTSDemux *demux;
|
|
GstQuery *query;
|
|
gboolean is_live = FALSE;
|
|
GstPad *peer;
|
|
|
|
demux = GST_MPEGTS_DEMUX (element);
|
|
query = gst_query_new_latency ();
|
|
peer = gst_pad_get_peer (demux->sinkpad);
|
|
|
|
if (peer) {
|
|
if (gst_pad_query (peer, query))
|
|
gst_query_parse_latency (query, &is_live, NULL, NULL);
|
|
gst_object_unref (peer);
|
|
}
|
|
gst_query_unref (query);
|
|
|
|
return is_live;
|
|
}
|
|
|
|
static GstClock *
|
|
gst_mpegts_demux_provide_clock (GstElement * element)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (element);
|
|
|
|
if (gst_mpegts_demux_provides_clock (element)) {
|
|
if (demux->clock == NULL) {
|
|
demux->clock = g_object_new (GST_TYPE_SYSTEM_CLOCK, "name",
|
|
"MpegTSClock", NULL);
|
|
demux->clock_base = GST_CLOCK_TIME_NONE;
|
|
}
|
|
return gst_object_ref (demux->clock);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const GstQueryType *
|
|
gst_mpegts_demux_src_pad_query_type (GstPad * pad)
|
|
{
|
|
static const GstQueryType types[] = {
|
|
GST_QUERY_LATENCY,
|
|
GST_QUERY_DURATION,
|
|
GST_QUERY_SEEKING,
|
|
0
|
|
};
|
|
|
|
return types;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpegts_demux_src_pad_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (gst_pad_get_parent (pad));
|
|
gboolean res = FALSE;
|
|
GstPad *peer;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_LATENCY:
|
|
{
|
|
peer = gst_pad_get_peer (demux->sinkpad);
|
|
if (peer) {
|
|
res = gst_pad_query (peer, query);
|
|
if (res) {
|
|
gboolean is_live;
|
|
GstClockTime min_latency, max_latency;
|
|
|
|
gst_query_parse_latency (query, &is_live, &min_latency, &max_latency);
|
|
if (is_live) {
|
|
min_latency += TS_LATENCY * GST_MSECOND;
|
|
if (max_latency != GST_CLOCK_TIME_NONE)
|
|
max_latency += TS_LATENCY * GST_MSECOND;
|
|
}
|
|
|
|
gst_query_set_latency (query, is_live, min_latency, max_latency);
|
|
}
|
|
gst_object_unref (peer);
|
|
}
|
|
break;
|
|
}
|
|
case GST_QUERY_DURATION:
|
|
{
|
|
GstFormat format;
|
|
GstPad *peer;
|
|
|
|
gst_query_parse_duration (query, &format, NULL);
|
|
|
|
/* Try query upstream first */
|
|
peer = gst_pad_get_peer (demux->sinkpad);
|
|
if (peer) {
|
|
res = gst_pad_query (peer, query);
|
|
/* Try doing something with that query if it failed */
|
|
if (!res && format == GST_FORMAT_TIME && demux->bitrate != -1) {
|
|
/* Try using cache first */
|
|
if (GST_CLOCK_TIME_IS_VALID (demux->cache_duration)) {
|
|
GST_LOG_OBJECT (demux, "replying duration query from cache %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (demux->cache_duration));
|
|
gst_query_set_duration (query, GST_FORMAT_TIME,
|
|
demux->cache_duration);
|
|
res = TRUE;
|
|
} else { /* Query upstream and approximate */
|
|
GstQuery *bquery = gst_query_new_duration (GST_FORMAT_BYTES);
|
|
gint64 duration = 0;
|
|
|
|
/* Query peer for duration in bytes */
|
|
res = gst_pad_query (peer, bquery);
|
|
if (res) {
|
|
/* Convert to time format */
|
|
gst_query_parse_duration (bquery, &format, &duration);
|
|
GST_DEBUG_OBJECT (demux, "query on peer pad reported bytes %"
|
|
G_GUINT64_FORMAT, duration);
|
|
demux->cache_duration = BYTES_TO_GSTTIME (duration);
|
|
GST_DEBUG_OBJECT (demux, "converted to time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (demux->cache_duration));
|
|
gst_query_set_duration (query, GST_FORMAT_TIME,
|
|
demux->cache_duration);
|
|
}
|
|
gst_query_unref (bquery);
|
|
}
|
|
} else {
|
|
GST_WARNING_OBJECT (demux, "unsupported query format or no bitrate "
|
|
"yet to approximate duration from bytes");
|
|
}
|
|
gst_object_unref (peer);
|
|
}
|
|
break;
|
|
}
|
|
case GST_QUERY_SEEKING:{
|
|
GstFormat fmt;
|
|
|
|
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
|
|
if (fmt == GST_FORMAT_BYTES) {
|
|
/* Seeking in BYTES format not supported at all */
|
|
gst_query_set_seeking (query, fmt, FALSE, -1, -1);
|
|
} else {
|
|
GstQuery *peerquery;
|
|
gboolean seekable;
|
|
|
|
/* Then ask upstream */
|
|
res = gst_pad_peer_query (demux->sinkpad, query);
|
|
if (res) {
|
|
/* If upstream can handle seeks we're done, if it
|
|
* can't we still have our TIME->BYTES conversion seek
|
|
*/
|
|
gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL);
|
|
if (seekable || fmt != GST_FORMAT_TIME)
|
|
goto beach;
|
|
}
|
|
|
|
/* We can't say anything about seekability if we didn't
|
|
* have a second PCR yet because the bitrate is calculated
|
|
* from this
|
|
*/
|
|
if (demux->bitrate == -1 && demux->pcr[1] == -1)
|
|
goto beach;
|
|
|
|
/* We can seek if upstream supports BYTES seeks and we
|
|
* have a bitrate
|
|
*/
|
|
peerquery = gst_query_new_seeking (GST_FORMAT_BYTES);
|
|
res = gst_pad_peer_query (demux->sinkpad, peerquery);
|
|
if (!res || demux->bitrate == -1) {
|
|
gst_query_set_seeking (query, fmt, FALSE, -1, -1);
|
|
} else {
|
|
gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL);
|
|
if (seekable)
|
|
gst_query_set_seeking (query, GST_FORMAT_TIME, TRUE, 0, -1);
|
|
else
|
|
gst_query_set_seeking (query, fmt, FALSE, -1, -1);
|
|
}
|
|
|
|
gst_query_unref (peerquery);
|
|
res = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_pad_query_default (pad, query);
|
|
break;
|
|
}
|
|
|
|
beach:
|
|
gst_object_unref (demux);
|
|
|
|
return res;
|
|
}
|
|
|
|
static FORCE_INLINE gint
|
|
is_mpegts_sync (const guint8 * in_data, const guint8 * end_data,
|
|
guint packetsize)
|
|
{
|
|
guint ret = 0;
|
|
if (G_LIKELY (IS_MPEGTS_SYNC (in_data)))
|
|
return 100;
|
|
|
|
if (in_data + packetsize < end_data - 5) {
|
|
if (G_LIKELY (IS_MPEGTS_SYNC (in_data + packetsize)))
|
|
ret += 50;
|
|
}
|
|
|
|
if (in_data[0] == 0x47) {
|
|
ret += 25;
|
|
|
|
if ((in_data[1] & 0x80) == 0x00)
|
|
ret += 10;
|
|
|
|
if ((in_data[3] & 0x10) == 0x10)
|
|
ret += 5;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static inline void
|
|
gst_mpegts_demux_detect_packet_size (GstMpegTSDemux * demux, guint len)
|
|
{
|
|
guint i, packetsize = 0;
|
|
|
|
for (i = 1; i < len; i++) {
|
|
packetsize = demux->sync_lut[i] - demux->sync_lut[i - 1];
|
|
if (packetsize == MPEGTS_NORMAL_TS_PACKETSIZE ||
|
|
packetsize == MPEGTS_M2TS_TS_PACKETSIZE ||
|
|
packetsize == MPEGTS_DVB_ASI_TS_PACKETSIZE ||
|
|
packetsize == MPEGTS_ATSC_TS_PACKETSIZE)
|
|
goto done;
|
|
else
|
|
packetsize = 0;
|
|
}
|
|
|
|
done:
|
|
demux->packetsize = (packetsize ? packetsize : MPEGTS_NORMAL_TS_PACKETSIZE);
|
|
GST_DEBUG_OBJECT (demux, "packet_size set to %d bytes", demux->packetsize);
|
|
}
|
|
|
|
static FORCE_INLINE guint
|
|
gst_mpegts_demux_sync_scan (GstMpegTSDemux * demux, const guint8 * in_data,
|
|
guint size, guint * flush)
|
|
{
|
|
guint sync_count = 0;
|
|
const guint8 *end_scan = in_data + size - demux->packetsize;
|
|
guint8 *ptr_data = (guint8 *) in_data;
|
|
guint packetsize =
|
|
(demux->packetsize ? demux->packetsize : MPEGTS_NORMAL_TS_PACKETSIZE);
|
|
|
|
/* Check if the LUT table is big enough */
|
|
if (G_UNLIKELY (demux->sync_lut_len < (size / packetsize))) {
|
|
demux->sync_lut_len = size / packetsize;
|
|
if (demux->sync_lut)
|
|
g_free (demux->sync_lut);
|
|
demux->sync_lut = g_new0 (guint8 *, demux->sync_lut_len);
|
|
GST_DEBUG_OBJECT (demux, "created sync LUT table with %u entries",
|
|
demux->sync_lut_len);
|
|
}
|
|
|
|
while (ptr_data <= end_scan && sync_count < demux->sync_lut_len) {
|
|
/* if sync code is found try to store it in the LUT */
|
|
guint chance = is_mpegts_sync (ptr_data, end_scan, packetsize);
|
|
if (G_LIKELY (chance > 50)) {
|
|
/* skip paketsize bytes and try find next */
|
|
guint8 *next_sync = ptr_data + packetsize;
|
|
if (next_sync < end_scan) {
|
|
demux->sync_lut[sync_count] = ptr_data;
|
|
sync_count++;
|
|
ptr_data += packetsize;
|
|
} else
|
|
goto done;
|
|
} else {
|
|
ptr_data++;
|
|
}
|
|
}
|
|
done:
|
|
if (G_UNLIKELY (!demux->packetsize))
|
|
gst_mpegts_demux_detect_packet_size (demux, sync_count);
|
|
|
|
*flush = ptr_data - in_data;
|
|
|
|
return sync_count;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_mpegts_demux_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (gst_pad_get_parent (pad));
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
const guint8 *data;
|
|
guint avail;
|
|
guint flush = 0;
|
|
gint i;
|
|
guint sync_count;
|
|
|
|
if (GST_BUFFER_IS_DISCONT (buffer)) {
|
|
gst_mpegts_demux_flush (demux, FALSE);
|
|
}
|
|
/* first push the new buffer into the adapter */
|
|
gst_adapter_push (demux->adapter, buffer);
|
|
|
|
/* check if there's enough data to parse a packet */
|
|
avail = gst_adapter_available (demux->adapter);
|
|
if (G_UNLIKELY (avail < demux->packetsize))
|
|
goto done;
|
|
|
|
/* recover all data from adapter */
|
|
data = gst_adapter_peek (demux->adapter, avail);
|
|
|
|
/* scan for sync codes */
|
|
sync_count = gst_mpegts_demux_sync_scan (demux, data, avail, &flush);
|
|
|
|
/* process all packets */
|
|
for (i = 0; i < sync_count; i++) {
|
|
ret = gst_mpegts_demux_parse_transport_packet (demux, demux->sync_lut[i]);
|
|
if (G_UNLIKELY (ret == GST_FLOW_LOST_SYNC
|
|
|| ret == GST_FLOW_NEED_MORE_DATA)) {
|
|
ret = GST_FLOW_OK;
|
|
continue;
|
|
}
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
|
|
flush = demux->sync_lut[i] - data + demux->packetsize;
|
|
flush = MIN (avail, flush);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
done:
|
|
/* flush processed data */
|
|
if (flush) {
|
|
GST_DEBUG_OBJECT (demux, "flushing %d/%d", flush, avail);
|
|
gst_adapter_flush (demux->adapter, flush);
|
|
}
|
|
|
|
gst_object_unref (demux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_mpegts_demux_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (element);
|
|
GstStateChangeReturn result;
|
|
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
demux->adapter = gst_adapter_new ();
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_mpegts_demux_reset (demux);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
g_object_unref (demux->adapter);
|
|
if (demux->sync_lut)
|
|
g_free (demux->sync_lut);
|
|
demux->sync_lut = NULL;
|
|
demux->sync_lut_len = 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static GValueArray *
|
|
mpegts_demux_build_pat_info (GstMpegTSDemux * demux)
|
|
{
|
|
GValueArray *vals = NULL;
|
|
GstMpegTSPAT *PAT;
|
|
gint i;
|
|
|
|
g_return_val_if_fail (demux->streams[0] != NULL, NULL);
|
|
g_return_val_if_fail (demux->streams[0]->PID_type ==
|
|
PID_TYPE_PROGRAM_ASSOCIATION, NULL);
|
|
|
|
PAT = &(demux->streams[0]->PAT);
|
|
vals = g_value_array_new (PAT->entries->len);
|
|
|
|
for (i = 0; i < PAT->entries->len; i++) {
|
|
GstMpegTSPATEntry *cur_entry =
|
|
&g_array_index (PAT->entries, GstMpegTSPATEntry, i);
|
|
GValue v = { 0, };
|
|
MpegTsPatInfo *info_obj;
|
|
|
|
info_obj = mpegts_pat_info_new (cur_entry->program_number, cur_entry->PID);
|
|
|
|
g_value_init (&v, G_TYPE_OBJECT);
|
|
g_value_take_object (&v, info_obj);
|
|
g_value_array_append (vals, &v);
|
|
}
|
|
return vals;
|
|
}
|
|
|
|
static MpegTsPmtInfo *
|
|
mpegts_demux_build_pmt_info (GstMpegTSDemux * demux, guint16 pmt_pid)
|
|
{
|
|
MpegTsPmtInfo *info_obj;
|
|
GstMpegTSPMT *PMT;
|
|
gint i;
|
|
|
|
g_return_val_if_fail (demux->streams[pmt_pid] != NULL, NULL);
|
|
g_return_val_if_fail (demux->streams[pmt_pid]->PID_type ==
|
|
PID_TYPE_PROGRAM_MAP, NULL);
|
|
|
|
PMT = &(demux->streams[pmt_pid]->PMT);
|
|
|
|
info_obj = mpegts_pmt_info_new (PMT->program_number, PMT->PCR_PID,
|
|
PMT->version_number);
|
|
|
|
for (i = 0; i < PMT->entries->len; i++) {
|
|
GstMpegTSStream *stream;
|
|
MpegTsPmtStreamInfo *stream_info;
|
|
GstMpegTSPMTEntry *cur_entry =
|
|
&g_array_index (PMT->entries, GstMpegTSPMTEntry, i);
|
|
|
|
stream = demux->streams[cur_entry->PID];
|
|
stream_info =
|
|
mpegts_pmt_stream_info_new (cur_entry->PID, stream->stream_type);
|
|
|
|
if (stream->ES_info) {
|
|
int i;
|
|
|
|
/* add languages */
|
|
guint8 *iso639_languages =
|
|
gst_mpeg_descriptor_find (stream->ES_info, DESC_ISO_639_LANGUAGE);
|
|
if (iso639_languages) {
|
|
for (i = 0; i < DESC_ISO_639_LANGUAGE_codes_n (iso639_languages); i++) {
|
|
gchar *language_n = (gchar *)
|
|
DESC_ISO_639_LANGUAGE_language_code_nth (iso639_languages, i);
|
|
mpegts_pmt_stream_info_add_language (stream_info,
|
|
g_strndup (language_n, 3));
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < gst_mpeg_descriptor_n_desc (stream->ES_info); ++i) {
|
|
guint8 *desc = gst_mpeg_descriptor_nth (stream->ES_info, i);
|
|
|
|
/* add the whole descriptor, tag + length + DESC_LENGTH bytes */
|
|
mpegts_pmt_stream_info_add_descriptor (stream_info,
|
|
(gchar *) desc, 2 + DESC_LENGTH (desc));
|
|
}
|
|
}
|
|
mpegts_pmt_info_add_stream (info_obj, stream_info);
|
|
}
|
|
return info_obj;
|
|
}
|
|
|
|
static void
|
|
gst_mpegts_demux_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (object);
|
|
gchar **pids;
|
|
guint num_pids;
|
|
int i;
|
|
|
|
switch (prop_id) {
|
|
case PROP_ES_PIDS:
|
|
pids = g_strsplit (g_value_get_string (value), ":", -1);
|
|
num_pids = g_strv_length (pids);
|
|
if (num_pids > 0) {
|
|
demux->elementary_pids = g_new0 (guint16, num_pids);
|
|
demux->nb_elementary_pids = num_pids;
|
|
for (i = 0; i < num_pids; i++) {
|
|
demux->elementary_pids[i] = strtol (pids[i], NULL, 0);
|
|
GST_INFO ("partial TS ES pid %d", demux->elementary_pids[i]);
|
|
}
|
|
}
|
|
g_strfreev (pids);
|
|
break;
|
|
case PROP_CHECK_CRC:
|
|
demux->check_crc = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_PROGRAM_NUMBER:
|
|
demux->program_number = g_value_get_int (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_mpegts_demux_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstMpegTSDemux *demux = GST_MPEGTS_DEMUX (object);
|
|
int i;
|
|
|
|
switch (prop_id) {
|
|
case PROP_ES_PIDS:
|
|
if (demux->nb_elementary_pids == 0) {
|
|
g_value_set_static_string (value, "");
|
|
} else {
|
|
gchar **ts_pids;
|
|
|
|
ts_pids = g_new0 (gchar *, demux->nb_elementary_pids + 1);
|
|
for (i = 0; i < demux->nb_elementary_pids; i++) {
|
|
ts_pids[i] = g_strdup_printf ("%d", demux->elementary_pids[i]);
|
|
}
|
|
|
|
g_value_set_string (value, g_strjoinv (":", ts_pids));
|
|
g_strfreev (ts_pids);
|
|
}
|
|
break;
|
|
case PROP_CHECK_CRC:
|
|
g_value_set_boolean (value, demux->check_crc);
|
|
break;
|
|
case PROP_PROGRAM_NUMBER:
|
|
g_value_set_int (value, demux->program_number);
|
|
break;
|
|
case PROP_PAT_INFO:
|
|
{
|
|
if (demux->streams[0] != NULL) {
|
|
g_value_take_boxed (value, mpegts_demux_build_pat_info (demux));
|
|
}
|
|
break;
|
|
}
|
|
case PROP_PMT_INFO:
|
|
{
|
|
if (demux->current_PMT != 0 && demux->streams[demux->current_PMT] != NULL) {
|
|
g_value_take_object (value, mpegts_demux_build_pmt_info (demux,
|
|
demux->current_PMT));
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_mpegts_demux_plugin_init (GstPlugin * plugin)
|
|
{
|
|
if (!gst_element_register (plugin, "mpegtsdemux",
|
|
GST_RANK_PRIMARY, GST_TYPE_MPEGTS_DEMUX))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|