+++ /dev/null
- /*
- * This library is licensed under 2 different licenses and you
- * can choose to use it under the terms of either one of them. The
- * two licenses are the MPL 1.1 and the LGPL.
- *
- * MPL:
- *
- * The contents of this file are subject to the Mozilla Public License
- * Version 1.1 (the "License"); you may not use this file except in
- * compliance with the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/.
- *
- * Software distributed under the License is distributed on an "AS IS"
- * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * LGPL:
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- *
- * The Original Code is Fluendo MPEG Demuxer plugin.
- *
- * The Initial Developer of the Original Code is Fluendo, S.L.
- * Portions created by Fluendo, S.L. are Copyright (C) 2005
- * Fluendo, S.L. All Rights Reserved.
- *
- * Contributor(s): Wim Taymans <wim@fluendo.com>
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <string.h>
-#include <stdlib.h>
-
-#ifdef USE_LIBOIL
-#include <liboil/liboil.h>
-#endif
-
-#include "gstmpegdefs.h"
-#include "gstmpegtsdemux.h"
-#include "flutspatinfo.h"
-#include "flutspmtinfo.h"
-
-#ifndef GST_CHECK_VERSION
-#define GST_CHECK_VERSION(major,minor,micro) \
- (GST_VERSION_MAJOR > (major) || \
- (GST_VERSION_MAJOR == (major) && GST_VERSION_MINOR > (minor)) || \
- (GST_VERSION_MAJOR == (major) && GST_VERSION_MINOR == (minor) && \
- GST_VERSION_MICRO >= (micro)))
-#endif
-
-#ifndef GST_BUFFER_IS_DISCONT
-#define GST_BUFFER_IS_DISCONT(buffer) \
- (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
-#endif
-
-GST_DEBUG_CATEGORY_STATIC (gstmpegtsdemux_debug);
-#define GST_CAT_DEFAULT (gstmpegtsdemux_debug)
-
-/* elementfactory information */
-#ifdef USE_LIBOIL
-#define LONGNAME "The Fluendo MPEG Transport stream demuxer (liboil build)"
-#else
-#define LONGNAME "The Fluendo MPEG Transport stream demuxer"
-#endif
-
-#ifndef __always_inline
-#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
-#define __always_inline inline __attribute__((always_inline))
-#else
-#define __always_inline inline
-#endif
-#endif
-
-#ifndef DISABLE_INLINE
-#define FORCE_INLINE __always_inline
-#else
-#define FORCE_INLINE
-#endif
-
-static GstElementDetails mpegts_demux_details = {
- LONGNAME,
- "Codec/Demuxer",
- "Demultiplexes MPEG2 Transport Streams",
- "Wim Taymans <wim@fluendo.com>"
-};
-
-/* MPEG2Demux signals and args */
-enum
-{
- /* FILL ME */
- LAST_SIGNAL
-};
-
-#define DEFAULT_PROP_ES_PIDS ""
-#define DEFAULT_PROP_CHECK_CRC TRUE
-#define DEFAULT_PROP_PROGRAM_NUMBER -1
-
-/* latency in mseconds */
-#define TS_LATENCY 700
-
-enum
-{
- PROP_0,
- PROP_ES_PIDS,
- PROP_CHECK_CRC,
- PROP_PROGRAM_NUMBER,
- PROP_PAT_INFO,
- PROP_PMT_INFO,
- PROP_M2TS
-};
-
-#define VIDEO_CAPS \
- GST_STATIC_CAPS (\
- "video/mpeg, " \
- "mpegversion = (int) { 1, 2, 4 }, " \
- "systemstream = (boolean) FALSE; " \
- "video/x-h264;" \
- "video/x-dirac" \
- )
-
-#define AUDIO_CAPS \
- GST_STATIC_CAPS ( \
- "audio/mpeg, " \
- "mpegversion = (int) { 1, 4 };" \
- "audio/x-lpcm, " \
- "width = (int) { 16, 20, 24 }, " \
- "rate = (int) { 48000, 96000 }, " \
- "channels = (int) [ 1, 8 ], " \
- "dynamic_range = (int) [ 0, 255 ], " \
- "emphasis = (boolean) { FALSE, TRUE }, " \
- "mute = (boolean) { FALSE, TRUE }; " \
- "audio/x-ac3;" \
- "audio/x-dts" \
- )
-
-static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
- GST_PAD_SINK,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS ("video/mpegts")
- );
-
-static GstStaticPadTemplate video_template =
-GST_STATIC_PAD_TEMPLATE ("video_%04x",
- GST_PAD_SRC,
- GST_PAD_SOMETIMES,
- VIDEO_CAPS);
-
-static GstStaticPadTemplate audio_template =
-GST_STATIC_PAD_TEMPLATE ("audio_%04x",
- GST_PAD_SRC,
- GST_PAD_SOMETIMES,
- AUDIO_CAPS);
-
-static GstStaticPadTemplate private_template =
-GST_STATIC_PAD_TEMPLATE ("private_%04x",
- GST_PAD_SRC,
- GST_PAD_SOMETIMES,
- GST_STATIC_CAPS_ANY);
-
-static void gst_mpegts_demux_base_init (GstMpegTSDemuxClass * klass);
-static void gst_mpegts_demux_class_init (GstMpegTSDemuxClass * klass);
-static void gst_mpegts_demux_init (GstMpegTSDemux * demux);
-static void gst_mpegts_demux_finalize (GstMpegTSDemux * demux);
-static void gst_mpegts_demux_reset (GstMpegTSDemux * demux);
-
-//static void gst_mpegts_demux_remove_pads (GstMpegTSDemux * demux);
-static void gst_mpegts_demux_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec);
-static void gst_mpegts_demux_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec);
-
-static gboolean gst_mpegts_demux_is_PMT (GstMpegTSDemux * demux, guint16 PID);
-
-static gboolean gst_mpegts_demux_sink_event (GstPad * pad, GstEvent * event);
-static GstFlowReturn gst_mpegts_demux_chain (GstPad * pad, GstBuffer * buffer);
-static gboolean gst_mpegts_demux_sink_setcaps (GstPad * pad, GstCaps * caps);
-
-static GstClock *gst_mpegts_demux_provide_clock (GstElement * element);
-static gboolean gst_mpegts_demux_src_pad_query (GstPad * pad, GstQuery * query);
-
-static GstStateChangeReturn gst_mpegts_demux_change_state (GstElement * element,
- GstStateChange transition);
-
-static MpegTsPmtInfo *mpegts_demux_build_pmt_info (GstMpegTSDemux * demux,
- guint16 pmt_pid);
-
-static GstElementClass *parent_class = NULL;
-
-/*static guint gst_mpegts_demux_signals[LAST_SIGNAL] = { 0 };*/
-
-GType
-gst_mpegts_demux_get_type (void)
-{
- static GType mpegts_demux_type = 0;
-
- if (G_UNLIKELY (!mpegts_demux_type)) {
- static const GTypeInfo mpegts_demux_info = {
- sizeof (GstMpegTSDemuxClass),
- (GBaseInitFunc) gst_mpegts_demux_base_init,
- NULL,
- (GClassInitFunc) gst_mpegts_demux_class_init,
- NULL,
- NULL,
- sizeof (GstMpegTSDemux),
- 0,
- (GInstanceInitFunc) gst_mpegts_demux_init,
- };
-
- mpegts_demux_type =
- g_type_register_static (GST_TYPE_ELEMENT, "GstMpegTSDemux",
- &mpegts_demux_info, 0);
-
- GST_DEBUG_CATEGORY_INIT (gstmpegtsdemux_debug, "mpegtsdemux", 0,
- "MPEG program stream demultiplexer element");
- }
-
- return mpegts_demux_type;
-}
-
-static void
-gst_mpegts_demux_base_init (GstMpegTSDemuxClass * klass)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
-
- klass->sink_template = gst_static_pad_template_get (&sink_template);
- klass->video_template = gst_static_pad_template_get (&video_template);
- klass->audio_template = gst_static_pad_template_get (&audio_template);
- klass->private_template = gst_static_pad_template_get (&private_template);
-
- gst_element_class_add_pad_template (element_class, klass->video_template);
- gst_element_class_add_pad_template (element_class, klass->audio_template);
- gst_element_class_add_pad_template (element_class, klass->private_template);
- gst_element_class_add_pad_template (element_class, klass->sink_template);
-
- gst_element_class_set_details (element_class, &mpegts_demux_details);
-}
-
-static void
-gst_mpegts_demux_class_init (GstMpegTSDemuxClass * klass)
-{
- GObjectClass *gobject_class;
- GstElementClass *gstelement_class;
-
- parent_class = g_type_class_peek_parent (klass);
-
- gobject_class = (GObjectClass *) klass;
- gstelement_class = (GstElementClass *) klass;
-
- gobject_class->finalize = (GObjectFinalizeFunc) gst_mpegts_demux_finalize;
- gobject_class->set_property = gst_mpegts_demux_set_property;
- gobject_class->get_property = gst_mpegts_demux_get_property;
-
- g_object_class_install_property (gobject_class, PROP_ES_PIDS,
- g_param_spec_string ("es-pids",
- "Colon separated list of PIDs containing Elementary Streams",
- "PIDs to treat as Elementary Streams in the absence of a PMT, "
- "eg 0x10:0x11:0x20", DEFAULT_PROP_ES_PIDS, G_PARAM_READWRITE));
- g_object_class_install_property (gobject_class, PROP_CHECK_CRC,
- g_param_spec_boolean ("check-crc", "Check CRC",
- "Enable CRC checking", DEFAULT_PROP_CHECK_CRC, G_PARAM_READWRITE));
- g_object_class_install_property (gobject_class, PROP_PROGRAM_NUMBER,
- g_param_spec_int ("program-number", "Program Number",
- "Program number to demux for (-1 to ignore)", -1, G_MAXINT,
- DEFAULT_PROP_PROGRAM_NUMBER, G_PARAM_READWRITE));
-
- g_object_class_install_property (gobject_class, PROP_PAT_INFO,
- g_param_spec_value_array ("pat-info",
- "GValueArray containing GObjects with properties",
- "Array of GObjects containing information from the TS PAT "
- "about all programs listed in the current Program Association "
- "Table (PAT)",
- g_param_spec_object ("flu-pat-streaminfo", "FluPATStreamInfo",
- "Fluendo TS Demuxer PAT Stream info object",
- MPEGTS_TYPE_PAT_INFO, G_PARAM_READABLE), G_PARAM_READABLE));
-
- g_object_class_install_property (gobject_class, PROP_PMT_INFO,
- g_param_spec_object ("pmt-info",
- "Information about the current program",
- "GObject with properties containing information from the TS PMT "
- "about the currently selected program and its streams",
- MPEGTS_TYPE_PMT_INFO, G_PARAM_READABLE));
-
- g_object_class_install_property (gobject_class, PROP_M2TS,
- g_param_spec_boolean ("m2ts_mode", "M2TS(192 bytes) Mode",
- "Defines if the input is normal TS ie .ts(188 bytes)"
- "or Blue-Ray Format ie .m2ts(192 bytes).", FALSE, G_PARAM_READWRITE));
-
- gstelement_class->change_state = gst_mpegts_demux_change_state;
- gstelement_class->provide_clock = gst_mpegts_demux_provide_clock;
-}
-
-static void
-gst_mpegts_demux_init (GstMpegTSDemux * demux)
-{
- GstMpegTSDemuxClass *klass = GST_MPEGTS_DEMUX_GET_CLASS (demux);
-
- demux->streams =
- g_malloc0 (sizeof (GstMpegTSStream *) * (MPEGTS_MAX_PID + 1));
- demux->sinkpad = gst_pad_new_from_template (klass->sink_template, "sink");
- gst_pad_set_chain_function (demux->sinkpad, gst_mpegts_demux_chain);
- gst_pad_set_event_function (demux->sinkpad, gst_mpegts_demux_sink_event);
- gst_pad_set_setcaps_function (demux->sinkpad, gst_mpegts_demux_sink_setcaps);
- gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
-
- demux->elementary_pids = NULL;
- demux->nb_elementary_pids = 0;
- demux->check_crc = DEFAULT_PROP_CHECK_CRC;
- demux->program_number = DEFAULT_PROP_PROGRAM_NUMBER;
- demux->packetsize = MPEGTS_NORMAL_TS_PACKETSIZE;
- demux->m2ts_mode = FALSE;
- demux->sync_lut = NULL;
- demux->sync_lut_len = 0;
-
-#ifdef USE_LIBOIL
- oil_init ();
-#endif
-}
-
-static void
-gst_mpegts_demux_finalize (GstMpegTSDemux * demux)
-{
- gst_mpegts_demux_reset (demux);
- g_free (demux->streams);
-
- G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (demux));
-}
-
-static void
-gst_mpegts_demux_reset (GstMpegTSDemux * demux)
-{
- /* Clean up the streams and pads we allocated */
- gint i;
-
- for (i = 0; i < MPEGTS_MAX_PID + 1; i++) {
- GstMpegTSStream *stream = demux->streams[i];
-
- if (stream != NULL) {
- if (stream->pad)
- gst_element_remove_pad (GST_ELEMENT_CAST (demux), stream->pad);
- if (stream->ES_info)
- gst_mpeg_descriptor_free (stream->ES_info);
-
- if (stream->PMT.entries)
- g_array_free (stream->PMT.entries, TRUE);
- if (stream->PMT.program_info)
- gst_mpeg_descriptor_free (stream->PMT.program_info);
-
- if (stream->PAT.entries)
- g_array_free (stream->PAT.entries, TRUE);
-
- switch (stream->PID_type) {
- case PID_TYPE_ELEMENTARY:
- gst_pes_filter_uninit (&stream->filter);
- break;
- case PID_PROGRAM_ASSOCIATION_TABLE:
- case PID_CONDITIONAL_ACCESS_TABLE:
- case PID_TYPE_PROGRAM_MAP:
- gst_section_filter_uninit (&stream->section_filter);
- break;
- }
-
- g_free (stream);
- demux->streams[i] = NULL;
- }
- }
-
- if (demux->clock) {
- g_object_unref (demux->clock);
- demux->clock = NULL;
- }
-}
-
-#if 0
-static void
-gst_mpegts_demux_remove_pads (GstMpegTSDemux * demux)
-{
- /* remove pads we added in preparation for adding new ones */
- /* FIXME: instead of walking all streams, we should retain a list only
- * of streams that have added pads */
- gint i;
-
- if (demux->need_no_more_pads) {
- gst_element_no_more_pads ((GstElement *) demux);
- demux->need_no_more_pads = FALSE;
- }
-
- for (i = 0; i < MPEGTS_MAX_PID + 1; i++) {
- GstMpegTSStream *stream = demux->streams[i];
-
- if (stream != NULL) {
-
- if (GST_IS_PAD (stream->pad)) {
- gst_pad_push_event (stream->pad, gst_event_new_eos ());
- gst_element_remove_pad (GST_ELEMENT_CAST (demux), stream->pad);
- }
- stream->pad = NULL;
-
- if (stream->PID_type == PID_TYPE_ELEMENTARY)
- gst_pes_filter_drain (&stream->filter);
- }
- }
-}
-#endif
-
-
-static guint32 crc_tab[256] = {
- 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
- 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
- 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
- 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
- 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
- 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));
- gboolean ret = FALSE;
- GstStructure *structure = NULL;
- gint expected_packetsize =
- (demux->
- m2ts_mode ? MPEGTS_M2TS_TS_PACKETSIZE : MPEGTS_NORMAL_TS_PACKETSIZE);
- gint packetsize = expected_packetsize;
-
- 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", &packetsize)) {
- GST_DEBUG_OBJECT (demux, "packetsize parameter not found in sink caps");
- }
-
- if (packetsize < expected_packetsize) {
- GST_WARNING_OBJECT (demux, "packetsize = %" G_GINT32_FORMAT "is less then"
- "expected packetsize of %d bytes", packetsize, expected_packetsize);
- goto beach;
- }
-
- /* here we my have a correct value for packet size */
- demux->packetsize = packetsize;
- ret = TRUE;
-
-beach:
- gst_object_unref (demux);
- return ret;
-}
-
-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_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);
- }
- 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_PS_AUDIO_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_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_PS_DVD_SUBPICTURE:
- 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));
- 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;
-
- time = MPEGTIME_TO_GSTTIME (base_PCR);
-
- GST_DEBUG_OBJECT (demux, "segment PTS to (%" G_GUINT64_FORMAT ") time: %"
- G_GUINT64_FORMAT, base_PCR, 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;
- }
-}
-
-#ifndef GST_FLOW_IS_SUCCESS
-#define GST_FLOW_IS_SUCCESS(ret) ((ret) >= GST_FLOW_OK)
-#endif
-
-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_LOG_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_LOG_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 %d 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;
-
- /* send new_segment */
- gst_mpegts_demux_send_new_segment (demux, stream, pts);
- }
-
- GST_DEBUG_OBJECT (demux, "pushing buffer");
- gst_buffer_set_caps (buffer, GST_PAD_CAPS (srcpad));
- 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, filter->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 */
-}
-
-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;
-}
-
-/*
- * 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 (*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 (gst_mpegts_demux_calc_crc32 (data - 3, datalen) != 0)
- goto wrong_crc;
-
- GST_DEBUG_OBJECT (demux, "PMT section_length: %d", datalen - 3);
-
- PMT = &stream->PMT;
-
- /* check if version number changed */
- version_number = (data[2] & 0x3e) >> 1;
- GST_DEBUG_OBJECT (demux, "PMT version_number: %d", version_number);
-
- current_next_indicator = (data[2] & 0x01);
- GST_DEBUG_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 */
- 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) {
-#ifdef USE_LIBOIL
- oil_memcpy (buffer->data, data, datalen);
-#else
- memcpy (buffer->data, data, datalen);
-#endif
- 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_DEBUG_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 " on PID 0x%04x "
- "and last pcr is %" G_GUINT64_FORMAT,
- pcr, stream->PID, 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) {
- 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) {
-
- 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 ((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 (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)
-{
- GstFlowReturn ret = GST_FLOW_OK;
-
- if (stream->pes_buffer) {
- 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);
- 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;
-#ifdef USE_LIBOIL
- oil_memcpy (out_data, in_data, in_size);
-#else
- memcpy (out_data, in_data, in_size);
-#endif
- stream->pes_buffer_used += in_size;
-done:
- return ret;
-}
-
-static FORCE_INLINE GstFlowReturn
-gst_mpegts_demux_pes_buffer_flush (GstMpegTSDemux * demux)
-{
- 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);
- 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);
-#ifdef USE_LIBOIL
- oil_memcpy (GST_BUFFER_DATA (es_buf), in_data, in_size);
-#else
- memcpy (GST_BUFFER_DATA (es_buf), in_data, in_size);
-#endif
- 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_DEBUG_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_DEBUG_OBJECT (demux, "consumed: %u datalen: %u", consumed, datalen);
- }
-
- /* If this packet has a payload, handle it */
- if (adaptation_field_control & 0x1) {
- GST_DEBUG_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 (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);
-#ifdef USE_LIBOIL
- oil_memcpy (GST_BUFFER_DATA (sec_buf), data, datalen);
-#else
- memcpy (GST_BUFFER_DATA (sec_buf), data, datalen);
-#endif
- 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);
- 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;
- guint16 PID;
- GstMpegTSStream *stream;
-
- /* skip sync byte */
- data++;
-
- /* get PID */
- PID = ((data[0] & 0x1f) << 8) | data[1];
-
- /* 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);
-
- return ret;
-
- /* ERRORS */
-}
-
-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;
-
- 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);
- res = gst_mpegts_demux_send_event (demux, event);
- break;
- case GST_EVENT_EOS:
- /* Flush buffered PES data */
- gst_mpegts_demux_pes_buffer_flush (demux);
- /* 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:
- res = gst_mpegts_demux_send_event (demux, event);
- break;
- default:
- res = gst_mpegts_demux_send_event (demux, event);
- break;
- }
- gst_object_unref (demux);
-
- return TRUE;
-}
-
-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 demux->clock;
- }
-
- return NULL;
-}
-
-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;
- gint64 duration;
-
- gst_query_parse_duration (query, &format, &duration);
-
- if (format == GST_FORMAT_BYTES) {
- res = FALSE;
- } else {
- res = gst_pad_query_default (pad, query);
- }
-
- break;
- }
- default:
- res = gst_pad_query_default (pad, query);
- }
-
- 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 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;
-
- /* Check if the LUT table is big enough */
- if (G_UNLIKELY (demux->sync_lut_len < (size / MPEGTS_NORMAL_TS_PACKETSIZE))) {
- demux->sync_lut_len = size / MPEGTS_NORMAL_TS_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, demux->packetsize);
- if (G_LIKELY (chance > 50)) {
- /* skip paketsize bytes and try find next */
- guint8 *next_sync = ptr_data + demux->packetsize;
- if (next_sync < end_scan) {
- demux->sync_lut[sync_count] = ptr_data;
- sync_count++;
- ptr_data += demux->packetsize;
- } else
- goto done;
-
- } else {
- ptr_data++;
- }
- }
-done:
- *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)) {
- /* Flush buffered PES data */
- gst_mpegts_demux_pes_buffer_flush (demux);
- gst_adapter_clear (demux->adapter);
- }
- /* 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_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;
- case PROP_M2TS:
- demux->m2ts_mode = g_value_get_boolean (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;
- }
- case PROP_M2TS:
- g_value_set_boolean (value, demux->m2ts_mode);
- 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;
-}
projects / platform / upstream / gstreamer.git / commitdiff