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257 lines
8 KiB
C
257 lines
8 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.A. 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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#ifndef __GST_MPEGTS_DEMUX_H__
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#define __GST_MPEGTS_DEMUX_H__
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include "gstmpegdesc.h"
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#include "gstpesfilter.h"
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#include "gstsectionfilter.h"
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G_BEGIN_DECLS
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#define MPEGTS_MIN_PES_BUFFER_SIZE 4 * 1024
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#define MPEGTS_MAX_PES_BUFFER_SIZE 256 * 1024
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#define MPEGTS_MAX_PID 0x1fff
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#define MPEGTS_NORMAL_TS_PACKETSIZE 188
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#define MPEGTS_M2TS_TS_PACKETSIZE 192
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#define MPEGTS_DVB_ASI_TS_PACKETSIZE 204
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#define MPEGTS_ATSC_TS_PACKETSIZE 208
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#define IS_MPEGTS_SYNC(data) (((data)[0] == 0x47) && \
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(((data)[1] & 0x80) == 0x00) && \
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(((data)[3] & 0x10) == 0x10))
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#define GST_TYPE_MPEGTS_DEMUX (gst_mpegts_demux_get_type())
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#define GST_MPEGTS_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),\
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GST_TYPE_MPEGTS_DEMUX,GstMpegTSDemux))
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#define GST_MPEGTS_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),\
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GST_TYPE_MPEGTS_DEMUX,GstMpegTSDemuxClass))
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#define GST_MPEGTS_DEMUX_GET_CLASS(klass) (G_TYPE_INSTANCE_GET_CLASS((klass),\
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GST_TYPE_MPEGTS_DEMUX,GstMpegTSDemuxClass))
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#define GST_IS_MPEGTS_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),\
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GST_TYPE_MPEGTS_DEMUX))
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#define GST_IS_MPEGTS_DEMUX_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),\
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GST_TYPE_MPEGTS_DEMUX))
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typedef struct _GstMpegTSStream GstMpegTSStream;
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typedef struct _GstMpegTSPMTEntry GstMpegTSPMTEntry;
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typedef struct _GstMpegTSPMT GstMpegTSPMT;
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typedef struct _GstMpegTSPATEntry GstMpegTSPATEntry;
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typedef struct _GstMpegTSPAT GstMpegTSPAT;
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typedef struct _GstMpegTSDemux GstMpegTSDemux;
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typedef struct _GstMpegTSDemuxClass GstMpegTSDemuxClass;
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struct _GstMpegTSPMTEntry {
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guint16 PID;
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};
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struct _GstMpegTSPMT {
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guint16 program_number;
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guint8 version_number;
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gboolean current_next_indicator;
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guint8 section_number;
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guint8 last_section_number;
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guint16 PCR_PID;
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guint16 program_info_length;
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GstMPEGDescriptor * program_info;
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GArray * entries;
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};
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struct _GstMpegTSPATEntry {
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guint16 program_number;
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guint16 PID;
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};
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struct _GstMpegTSPAT {
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guint16 transport_stream_id;
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guint8 version_number;
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gboolean current_next_indicator;
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guint8 section_number;
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guint8 last_section_number;
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GArray * entries;
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};
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typedef enum _MpegTsStreamFlags {
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MPEGTS_STREAM_FLAG_STREAM_TYPE_UNKNOWN = 0x01,
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MPEGTS_STREAM_FLAG_PMT_VALID = 0x02,
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MPEGTS_STREAM_FLAG_IS_VIDEO = 0x04,
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MPEGTS_STREAM_FLAG_IS_AUDIO = 0x08
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} MpegTsStreamFlags;
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/* Information associated to a single MPEG stream. */
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struct _GstMpegTSStream {
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GstMpegTSDemux * demux;
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MpegTsStreamFlags flags;
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/* PID and type */
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guint16 PID;
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guint8 PID_type;
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/* adaptation_field data */
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guint64 last_PCR;
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guint64 base_PCR;
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guint64 last_OPCR;
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guint64 last_PCR_difference;
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gboolean discont_PCR;
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GstClockTimeDiff discont_difference;
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/* for PAT streams */
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GstMpegTSPAT PAT;
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/* for PMT streams */
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GstMpegTSPMT PMT;
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/* for CA streams */
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/* for PAT, PMT, CA and private streams */
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GstSectionFilter section_filter;
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/* for PES streams */
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guint8 id;
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guint8 stream_type;
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GstBuffer * pes_buffer;
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guint32 pes_buffer_size;
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guint32 pes_buffer_used;
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gboolean pes_buffer_overflow;
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gboolean pes_buffer_in_sync;
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GstPESFilter filter;
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GstPad * pad;
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GstFlowReturn last_ret;
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GstMPEGDescriptor *ES_info;
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/* needed because 33bit mpeg timestamps wrap around every (approx) 26.5 hrs */
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GstClockTimeDiff base_time;
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GstClockTime last_time;
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/* pid of PMT that this stream belongs to */
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guint16 PMT_pid;
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gboolean discont;
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};
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struct _GstMpegTSDemux {
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GstElement parent;
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/* properties */
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gboolean check_crc;
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/* sink pad and adapter */
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GstPad * sinkpad;
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GstAdapter * adapter;
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guint8 ** sync_lut;
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guint sync_lut_len;
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/* current PMT PID */
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guint16 current_PMT;
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/* Array of MPEGTS_MAX_PID + 1 stream entries */
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GstMpegTSStream ** streams;
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/* Array to perform pmts checks at gst_mpegts_demux_parse_adaptation_field */
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gboolean pmts_checked[MPEGTS_MAX_PID + 1];
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/* Array of Elementary Stream pids for ts with PMT */
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guint16 * elementary_pids;
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guint nb_elementary_pids;
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/* Program number to use */
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gint program_number;
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/* indicates that we need to close our pad group, because we've added
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* at least one pad */
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gboolean need_no_more_pads;
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gint packetsize;
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gboolean m2ts_mode;
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/* clocking */
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GstClock * clock;
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GstClockTime clock_base;
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/* Additional information required for seeking.
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* num_packets: Number of packets outputted
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* bitrate: estimated bitrate (based on pcr and num_packets */
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guint64 num_packets;
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gint64 bitrate;
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/* Two PCRs observations to calculate bitrate */
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guint64 pcr[2];
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/* Cached duration estimation */
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GstClockTime cache_duration;
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/* Cached base_PCR in GStreamer time. */
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GstClockTime base_pts;
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/* base timings on first buffer timestamp */
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GstClockTime first_buf_ts;
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GstClockTime in_gap;
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/* Detect when the source stops for a while, we will resync the interpolation gap */
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GstClockTime last_buf_ts;
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/* Number of expected pads which have not been added yet */
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gint pending_pads;
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gboolean tried_adding_pads;
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};
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struct _GstMpegTSDemuxClass {
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GstElementClass parent_class;
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GstPadTemplate * sink_template;
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GstPadTemplate * video_template;
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GstPadTemplate * audio_template;
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GstPadTemplate * subpicture_template;
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GstPadTemplate * private_template;
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};
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GType gst_mpegts_demux_get_type (void);
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gboolean gst_mpegts_demux_plugin_init (GstPlugin *plugin);
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G_END_DECLS
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#endif /* __GST_MPEGTS_DEMUX_H__ */
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