/* * Copyright 2006, 2007, 2008, 2009, 2010 Fluendo S.A. * Authors: Jan Schmidt * Kapil Agrawal * Julien Moutte * * Copyright (C) 2011 Jan Schmidt * * This library is licensed under 4 different licenses and you * can choose to use it under the terms of any one of them. The * four licenses are the MPL 1.1, the LGPL, the GPL and the MIT * license. * * 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. * * GPL: * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * MIT: * * Unless otherwise indicated, Source Code is licensed under MIT license. * See further explanation attached in License Statement (distributed in the file * LICENSE). * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is furnished to do * so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include /* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex * with newer GLib versions (>= 2.31.0) */ #define GLIB_DISABLE_DEPRECATION_WARNINGS #include #include "mpegtsmux.h" #include "mpegtsmux_aac.h" #include "mpegtsmux_ttxt.h" GST_DEBUG_CATEGORY (mpegtsmux_debug); #define GST_CAT_DEFAULT mpegtsmux_debug enum { ARG_0, ARG_PROG_MAP, ARG_M2TS_MODE, ARG_PAT_INTERVAL, ARG_PMT_INTERVAL, ARG_ALIGNMENT }; #define MPEGTSMUX_DEFAULT_ALIGNMENT -1 #define MPEGTSMUX_DEFAULT_M2TS FALSE static GstStaticPadTemplate mpegtsmux_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS ("video/mpeg, " "mpegversion = (int) { 1, 2, 4 }, " "systemstream = (boolean) false; " "video/x-dirac;" "video/x-h264,stream-format=(string)byte-stream;" "audio/mpeg, " "mpegversion = (int) { 1, 2 };" "audio/mpeg, " "mpegversion = (int) 4, stream-format = (string) { raw, adts };" "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;" "subpicture/x-dvb;" "private/teletext")); static GstStaticPadTemplate mpegtsmux_src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/mpegts, " "systemstream = (boolean) true, " "packetsize = (int) { 188, 192} ") ); static void gst_mpegtsmux_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_mpegtsmux_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void mpegtsmux_reset (MpegTsMux * mux, gboolean alloc); static void mpegtsmux_dispose (GObject * object); static void alloc_packet_cb (GstBuffer ** _buf, void *user_data); static gboolean new_packet_cb (GstBuffer * buf, void *user_data, gint64 new_pcr); static void release_buffer_cb (guint8 * data, void *user_data); static GstFlowReturn mpegtsmux_collect_packet (MpegTsMux * mux, GstBuffer * buf); static GstFlowReturn mpegtsmux_push_packets (MpegTsMux * mux, gboolean force); static gboolean new_packet_m2ts (MpegTsMux * mux, GstBuffer * buf, gint64 new_pcr); static void mpegtsdemux_prepare_srcpad (MpegTsMux * mux); GstFlowReturn mpegtsmux_clip_inc_running_time (GstCollectPads * pads, GstCollectData * cdata, GstBuffer * buf, GstBuffer ** outbuf, gpointer user_data); static GstFlowReturn mpegtsmux_collected (GstCollectPads * pads, GstCollectData * data, GstBuffer * buf, MpegTsMux * mux); static gboolean mpegtsmux_sink_event (GstCollectPads * pads, GstCollectData * data, GstEvent * event, gpointer user_data); static GstPad *mpegtsmux_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * name, const GstCaps * caps); static void mpegtsmux_release_pad (GstElement * element, GstPad * pad); static GstStateChangeReturn mpegtsmux_change_state (GstElement * element, GstStateChange transition); static void mpegtsdemux_set_header_on_caps (MpegTsMux * mux); static gboolean mpegtsmux_src_event (GstPad * pad, GstObject * parent, GstEvent * event); #if 0 static void mpegtsmux_set_index (GstElement * element, GstIndex * index); static GstIndex *mpegtsmux_get_index (GstElement * element); static GstFormat pts_format; static GstFormat spn_format; #endif typedef struct { GstMapInfo map_info; GstBuffer *buffer; } StreamData; G_DEFINE_TYPE (MpegTsMux, mpegtsmux, GST_TYPE_ELEMENT) static StreamData *stream_data_new (GstBuffer * buffer) { StreamData *res = g_new (StreamData, 1); res->buffer = buffer; gst_buffer_map (buffer, &(res->map_info), GST_MAP_READ); return res; } static void stream_data_free (StreamData * data) { if (data) { gst_buffer_unmap (data->buffer, &data->map_info); gst_buffer_unref (data->buffer); g_free (data); } } #define parent_class mpegtsmux_parent_class static void mpegtsmux_class_init (MpegTsMuxClass * klass) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); GObjectClass *gobject_class = G_OBJECT_CLASS (klass); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&mpegtsmux_sink_factory)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&mpegtsmux_src_factory)); gst_element_class_set_static_metadata (gstelement_class, "MPEG Transport Stream Muxer", "Codec/Muxer", "Multiplexes media streams into an MPEG Transport Stream", "Fluendo "); gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_mpegtsmux_set_property); gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_mpegtsmux_get_property); gobject_class->dispose = mpegtsmux_dispose; gstelement_class->request_new_pad = mpegtsmux_request_new_pad; gstelement_class->release_pad = mpegtsmux_release_pad; gstelement_class->change_state = mpegtsmux_change_state; #if 0 gstelement_class->set_index = GST_DEBUG_FUNCPTR (mpegtsmux_set_index); gstelement_class->get_index = GST_DEBUG_FUNCPTR (mpegtsmux_get_index); #endif g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PROG_MAP, g_param_spec_boxed ("prog-map", "Program map", "A GstStructure specifies the mapping from elementary streams to programs", GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_M2TS_MODE, g_param_spec_boolean ("m2ts-mode", "M2TS(192 bytes) Mode", "Set to TRUE to output Blu-Ray disc format with 192 byte packets. " "FALSE for standard TS format with 188 byte packets.", MPEGTSMUX_DEFAULT_M2TS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PAT_INTERVAL, g_param_spec_uint ("pat-interval", "PAT interval", "Set the interval (in ticks of the 90kHz clock) for writing out the PAT table", 1, G_MAXUINT, TSMUX_DEFAULT_PAT_INTERVAL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PMT_INTERVAL, g_param_spec_uint ("pmt-interval", "PMT interval", "Set the interval (in ticks of the 90kHz clock) for writing out the PMT table", 1, G_MAXUINT, TSMUX_DEFAULT_PMT_INTERVAL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ALIGNMENT, g_param_spec_int ("alignment", "packet alignment", "Number of packets per buffer (padded with dummy packets on EOS) " "(-1 = auto, 0 = all available packets)", -1, G_MAXINT, MPEGTSMUX_DEFAULT_ALIGNMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); } static void mpegtsmux_init (MpegTsMux * mux) { mux->srcpad = gst_pad_new_from_static_template (&mpegtsmux_src_factory, "src"); gst_pad_use_fixed_caps (mux->srcpad); gst_pad_set_event_function (mux->srcpad, GST_DEBUG_FUNCPTR (mpegtsmux_src_event)); gst_element_add_pad (GST_ELEMENT (mux), mux->srcpad); mux->collect = gst_collect_pads_new (); gst_collect_pads_set_buffer_function (mux->collect, (GstCollectPadsBufferFunction) GST_DEBUG_FUNCPTR (mpegtsmux_collected), mux); gst_collect_pads_set_event_function (mux->collect, (GstCollectPadsEventFunction) GST_DEBUG_FUNCPTR (mpegtsmux_sink_event), mux); gst_collect_pads_set_clip_function (mux->collect, (GstCollectPadsClipFunction) GST_DEBUG_FUNCPTR (mpegtsmux_clip_inc_running_time), mux); mux->tsmux = tsmux_new (); tsmux_set_write_func (mux->tsmux, new_packet_cb, mux); mux->adapter = gst_adapter_new (); mux->out_adapter = gst_adapter_new (); /* properties */ mux->m2ts_mode = MPEGTSMUX_DEFAULT_M2TS; mux->pat_interval = TSMUX_DEFAULT_PAT_INTERVAL; mux->pmt_interval = TSMUX_DEFAULT_PMT_INTERVAL; mux->prog_map = NULL; mux->alignment = MPEGTSMUX_DEFAULT_ALIGNMENT; /* initial state */ mpegtsmux_reset (mux, TRUE); } static void mpegtsmux_pad_reset (MpegTsPadData * pad_data) { pad_data->pid = 0; pad_data->last_pts = GST_CLOCK_TIME_NONE; pad_data->last_dts = GST_CLOCK_TIME_NONE; pad_data->prog_id = -1; #if 0 pad_data->prog_id = -1; pad_data->element_index_writer_id = -1; #endif if (pad_data->free_func) pad_data->free_func (pad_data->prepare_data); pad_data->prepare_data = NULL; pad_data->prepare_func = NULL; pad_data->free_func = NULL; if (pad_data->codec_data) gst_buffer_replace (&pad_data->codec_data, NULL); /* reference owned elsewhere */ pad_data->stream = NULL; pad_data->prog = NULL; } static void mpegtsmux_reset (MpegTsMux * mux, gboolean alloc) { GSList *walk; mux->first = TRUE; mux->last_flow_ret = GST_FLOW_OK; mux->previous_pcr = -1; mux->pcr_rate_num = mux->pcr_rate_den = 1; mux->last_ts = 0; mux->is_delta = TRUE; mux->streamheader = NULL; mux->streamheader_sent = FALSE; mux->force_key_unit_event = NULL; mux->pending_key_unit_ts = GST_CLOCK_TIME_NONE; #if 0 mux->spn_count = 0; if (mux->element_index) { gst_object_unref (mux->element_index); mux->element_index = NULL; } #endif gst_adapter_clear (mux->adapter); gst_adapter_clear (mux->out_adapter); if (mux->tsmux) { tsmux_free (mux->tsmux); mux->tsmux = NULL; } if (mux->streamheader) { GstBuffer *buf; GList *sh; sh = mux->streamheader; while (sh) { buf = sh->data; gst_buffer_unref (buf); sh = g_list_next (sh); } g_list_free (mux->streamheader); mux->streamheader = NULL; } gst_event_replace (&mux->force_key_unit_event, NULL); gst_buffer_replace (&mux->out_buffer, NULL); GST_COLLECT_PADS_STREAM_LOCK (mux->collect); for (walk = mux->collect->data; walk != NULL; walk = g_slist_next (walk)) mpegtsmux_pad_reset ((MpegTsPadData *) walk->data); GST_COLLECT_PADS_STREAM_UNLOCK (mux->collect); if (alloc) { mux->tsmux = tsmux_new (); tsmux_set_write_func (mux->tsmux, new_packet_cb, mux); tsmux_set_alloc_func (mux->tsmux, alloc_packet_cb, mux); } } static void mpegtsmux_dispose (GObject * object) { MpegTsMux *mux = GST_MPEG_TSMUX (object); mpegtsmux_reset (mux, FALSE); if (mux->adapter) { g_object_unref (mux->adapter); mux->adapter = NULL; } if (mux->out_adapter) { g_object_unref (mux->out_adapter); mux->out_adapter = NULL; } if (mux->collect) { gst_object_unref (mux->collect); mux->collect = NULL; } if (mux->prog_map) { gst_structure_free (mux->prog_map); mux->prog_map = NULL; } GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object)); } static void gst_mpegtsmux_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { MpegTsMux *mux = GST_MPEG_TSMUX (object); GSList *walk; switch (prop_id) { case ARG_M2TS_MODE: /*set incase if the output stream need to be of 192 bytes */ mux->m2ts_mode = g_value_get_boolean (value); break; case ARG_PROG_MAP: { const GstStructure *s = gst_value_get_structure (value); if (mux->prog_map) { gst_structure_free (mux->prog_map); } if (s) mux->prog_map = gst_structure_copy (s); else mux->prog_map = NULL; break; } case ARG_PAT_INTERVAL: mux->pat_interval = g_value_get_uint (value); if (mux->tsmux) tsmux_set_pat_interval (mux->tsmux, mux->pat_interval); break; case ARG_PMT_INTERVAL: walk = mux->collect->data; mux->pmt_interval = g_value_get_uint (value); while (walk) { MpegTsPadData *ts_data = (MpegTsPadData *) walk->data; tsmux_set_pmt_interval (ts_data->prog, mux->pmt_interval); walk = g_slist_next (walk); } break; case ARG_ALIGNMENT: mux->alignment = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_mpegtsmux_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { MpegTsMux *mux = GST_MPEG_TSMUX (object); switch (prop_id) { case ARG_M2TS_MODE: g_value_set_boolean (value, mux->m2ts_mode); break; case ARG_PROG_MAP: gst_value_set_structure (value, mux->prog_map); break; case ARG_PAT_INTERVAL: g_value_set_uint (value, mux->pat_interval); break; case ARG_PMT_INTERVAL: g_value_set_uint (value, mux->pmt_interval); break; case ARG_ALIGNMENT: g_value_set_int (value, mux->alignment); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } #if 0 static void mpegtsmux_set_index (GstElement * element, GstIndex * index) { MpegTsMux *mux = GST_MPEG_TSMUX (element); GST_OBJECT_LOCK (mux); if (mux->element_index) gst_object_unref (mux->element_index); mux->element_index = index ? gst_object_ref (index) : NULL; GST_OBJECT_UNLOCK (mux); GST_DEBUG_OBJECT (mux, "Set index %" GST_PTR_FORMAT, mux->element_index); } static GstIndex * mpegtsmux_get_index (GstElement * element) { GstIndex *result = NULL; MpegTsMux *mux = GST_MPEG_TSMUX (element); GST_OBJECT_LOCK (mux); if (mux->element_index) result = gst_object_ref (mux->element_index); GST_OBJECT_UNLOCK (mux); GST_DEBUG_OBJECT (mux, "Returning index %" GST_PTR_FORMAT, result); return result; } #endif static void release_buffer_cb (guint8 * data, void *user_data) { stream_data_free (user_data); } static GstFlowReturn mpegtsmux_create_stream (MpegTsMux * mux, MpegTsPadData * ts_data) { GstFlowReturn ret = GST_FLOW_ERROR; GstCaps *caps; GstStructure *s; GstPad *pad; TsMuxStreamType st = TSMUX_ST_RESERVED; const gchar *mt; const GValue *value = NULL; GstBuffer *codec_data = NULL; pad = ts_data->collect.pad; caps = gst_pad_get_current_caps (pad); if (caps == NULL) goto not_negotiated; GST_DEBUG_OBJECT (pad, "Creating stream with PID 0x%04x for caps %" GST_PTR_FORMAT, ts_data->pid, caps); s = gst_caps_get_structure (caps, 0); g_return_val_if_fail (s != NULL, FALSE); mt = gst_structure_get_name (s); value = gst_structure_get_value (s, "codec_data"); if (value != NULL) codec_data = gst_value_get_buffer (value); if (strcmp (mt, "video/x-dirac") == 0) { st = TSMUX_ST_VIDEO_DIRAC; } else if (strcmp (mt, "audio/x-ac3") == 0) { st = TSMUX_ST_PS_AUDIO_AC3; } else if (strcmp (mt, "audio/x-dts") == 0) { st = TSMUX_ST_PS_AUDIO_DTS; } else if (strcmp (mt, "audio/x-lpcm") == 0) { st = TSMUX_ST_PS_AUDIO_LPCM; } else if (strcmp (mt, "video/x-h264") == 0) { st = TSMUX_ST_VIDEO_H264; } else if (strcmp (mt, "audio/mpeg") == 0) { gint mpegversion; if (!gst_structure_get_int (s, "mpegversion", &mpegversion)) { GST_ERROR_OBJECT (pad, "caps missing mpegversion"); goto not_negotiated; } switch (mpegversion) { case 1: st = TSMUX_ST_AUDIO_MPEG1; break; case 2: st = TSMUX_ST_AUDIO_MPEG2; break; case 4: { st = TSMUX_ST_AUDIO_AAC; if (codec_data) { /* TODO - Check stream format - codec data should only come with RAW stream */ GST_DEBUG_OBJECT (pad, "we have additional codec data (%" G_GSIZE_FORMAT " bytes)", gst_buffer_get_size (codec_data)); ts_data->codec_data = gst_buffer_ref (codec_data); ts_data->prepare_func = mpegtsmux_prepare_aac; } else { ts_data->codec_data = NULL; } break; } default: GST_WARNING_OBJECT (pad, "unsupported mpegversion %d", mpegversion); goto not_negotiated; } } else if (strcmp (mt, "video/mpeg") == 0) { gint mpegversion; if (!gst_structure_get_int (s, "mpegversion", &mpegversion)) { GST_ERROR_OBJECT (pad, "caps missing mpegversion"); goto not_negotiated; } switch (mpegversion) { case 1: st = TSMUX_ST_VIDEO_MPEG1; break; case 2: st = TSMUX_ST_VIDEO_MPEG2; break; case 4: st = TSMUX_ST_VIDEO_MPEG4; break; default: GST_WARNING_OBJECT (pad, "unsupported mpegversion %d", mpegversion); goto not_negotiated; } } else if (strcmp (mt, "subpicture/x-dvb") == 0) { st = TSMUX_ST_PS_DVB_SUBPICTURE; } else if (strcmp (mt, "private/teletext") == 0) { st = TSMUX_ST_PS_TELETEXT; /* needs a particularly sized layout */ ts_data->prepare_func = mpegtsmux_prepare_teletext; } if (st != TSMUX_ST_RESERVED) { ts_data->stream = tsmux_create_stream (mux->tsmux, st, ts_data->pid); } else { GST_DEBUG_OBJECT (pad, "Failed to determine stream type"); } if (ts_data->stream != NULL) { gst_structure_get_int (s, "rate", &ts_data->stream->audio_sampling); gst_structure_get_int (s, "channels", &ts_data->stream->audio_channels); gst_structure_get_int (s, "bitrate", &ts_data->stream->audio_bitrate); tsmux_stream_set_buffer_release_func (ts_data->stream, release_buffer_cb); tsmux_program_add_stream (ts_data->prog, ts_data->stream); ret = GST_FLOW_OK; } #if 0 GST_OBJECT_LOCK (mux); if (mux->element_index) { gboolean parsed = FALSE; if (ts_data->stream->is_video_stream) { if (gst_structure_get_boolean (s, "parsed", &parsed) && parsed) { if (ts_data->element_index_writer_id == -1) { gst_index_get_writer_id (mux->element_index, GST_OBJECT (mux), &ts_data->element_index_writer_id); GST_DEBUG_OBJECT (mux, "created GstIndex writer_id = %d for stream", ts_data->element_index_writer_id); gst_index_add_format (mux->element_index, ts_data->element_index_writer_id, pts_format); gst_index_add_format (mux->element_index, ts_data->element_index_writer_id, spn_format); } } else { GST_WARNING_OBJECT (pad, "no indexing for (unparsed) stream !"); } } } GST_OBJECT_UNLOCK (mux); #endif gst_caps_unref (caps); return ret; /* ERRORS */ not_negotiated: { GST_DEBUG_OBJECT (pad, "Sink pad caps were not set before pushing"); if (caps) gst_caps_unref (caps); return GST_FLOW_NOT_NEGOTIATED; } } static GstFlowReturn mpegtsmux_create_streams (MpegTsMux * mux) { GstFlowReturn ret = GST_FLOW_OK; GSList *walk = mux->collect->data; /* Create the streams */ while (walk) { GstCollectData *c_data = (GstCollectData *) walk->data; MpegTsPadData *ts_data = (MpegTsPadData *) walk->data; gchar *name = NULL; walk = g_slist_next (walk); if (ts_data->prog_id == -1) { name = GST_PAD_NAME (c_data->pad); if (mux->prog_map != NULL && gst_structure_has_field (mux->prog_map, name)) { gint idx; gboolean ret = gst_structure_get_int (mux->prog_map, name, &idx); if (!ret) { GST_ELEMENT_ERROR (mux, STREAM, MUX, ("Reading program map failed. Assuming default"), (NULL)); idx = DEFAULT_PROG_ID; } if (idx < 0 || idx >= MAX_PROG_NUMBER) { GST_DEBUG_OBJECT (mux, "Program number %d associate with pad %s out " "of range (max = %d); DEFAULT_PROGRAM = %d is used instead", idx, name, MAX_PROG_NUMBER, DEFAULT_PROG_ID); idx = DEFAULT_PROG_ID; } ts_data->prog_id = idx; } else { ts_data->prog_id = DEFAULT_PROG_ID; } } ts_data->prog = mux->programs[ts_data->prog_id]; if (ts_data->prog == NULL) { ts_data->prog = tsmux_program_new (mux->tsmux); if (ts_data->prog == NULL) goto no_program; tsmux_set_pmt_interval (ts_data->prog, mux->pmt_interval); mux->programs[ts_data->prog_id] = ts_data->prog; } if (ts_data->stream == NULL) { ret = mpegtsmux_create_stream (mux, ts_data); if (ret != GST_FLOW_OK) goto no_stream; } } return GST_FLOW_OK; /* ERRORS */ no_program: { GST_ELEMENT_ERROR (mux, STREAM, MUX, ("Could not create new program"), (NULL)); return GST_FLOW_ERROR; } no_stream: { GST_ELEMENT_ERROR (mux, STREAM, MUX, ("Could not create handler for stream"), (NULL)); return ret; } } #define COLLECT_DATA_PAD(collect_data) (((GstCollectData *)(collect_data))->pad) static gboolean mpegtsmux_sink_event (GstCollectPads * pads, GstCollectData * data, GstEvent * event, gpointer user_data) { MpegTsMux *mux = GST_MPEG_TSMUX (user_data); gboolean res = FALSE; gboolean forward = TRUE; GstPad *pad; pad = data->pad; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CUSTOM_DOWNSTREAM: { GstClockTime timestamp, stream_time, running_time; gboolean all_headers; guint count; if (!gst_video_event_is_force_key_unit (event)) goto out; res = TRUE; forward = FALSE; gst_video_event_parse_downstream_force_key_unit (event, ×tamp, &stream_time, &running_time, &all_headers, &count); GST_INFO_OBJECT (mux, "have downstream force-key-unit event on pad %s, " "seqnum %d, running-time %" GST_TIME_FORMAT " count %d", gst_pad_get_name (pad), gst_event_get_seqnum (event), GST_TIME_ARGS (running_time), count); if (mux->force_key_unit_event != NULL) { GST_INFO_OBJECT (mux, "skipping downstream force key unit event " "as an upstream force key unit is already queued"); goto out; } if (!all_headers) goto out; mux->pending_key_unit_ts = running_time; gst_event_replace (&mux->force_key_unit_event, event); break; } default: break; } out: if (!forward) gst_event_unref (event); else res = gst_collect_pads_event_default (pads, data, event, FALSE); return res; } static gboolean mpegtsmux_src_event (GstPad * pad, GstObject * parent, GstEvent * event) { MpegTsMux *mux = GST_MPEG_TSMUX (gst_pad_get_parent (pad)); gboolean res = TRUE, forward = TRUE; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CUSTOM_UPSTREAM: { GstIterator *iter; GstIteratorResult iter_ret; GstPad *sinkpad; GValue sinkpad_value = G_VALUE_INIT; GstClockTime running_time; gboolean all_headers, done; guint count; if (!gst_video_event_is_force_key_unit (event)) break; forward = FALSE; gst_video_event_parse_upstream_force_key_unit (event, &running_time, &all_headers, &count); GST_INFO_OBJECT (mux, "received upstream force-key-unit event, " "seqnum %d running_time %" GST_TIME_FORMAT " all_headers %d count %d", gst_event_get_seqnum (event), GST_TIME_ARGS (running_time), all_headers, count); if (!all_headers) break; mux->pending_key_unit_ts = running_time; gst_event_replace (&mux->force_key_unit_event, event); iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mux)); done = FALSE; while (!done) { gboolean res = FALSE, tmp; iter_ret = gst_iterator_next (iter, &sinkpad_value); sinkpad = g_value_get_object (&sinkpad_value); switch (iter_ret) { case GST_ITERATOR_DONE: done = TRUE; break; case GST_ITERATOR_OK: GST_INFO_OBJECT (mux, "forwarding to %s", gst_pad_get_name (sinkpad)); tmp = gst_pad_push_event (sinkpad, gst_event_ref (event)); GST_INFO_OBJECT (mux, "result %d", tmp); /* succeed if at least one pad succeeds */ res |= tmp; break; case GST_ITERATOR_ERROR: done = TRUE; break; case GST_ITERATOR_RESYNC: break; } g_value_reset (&sinkpad_value); } g_value_unset (&sinkpad_value); gst_iterator_free (iter); break; } default: break; } if (forward) res = gst_pad_event_default (pad, parent, event); else gst_event_unref (event); gst_object_unref (mux); return res; } static GstEvent * check_pending_key_unit_event (GstEvent * pending_event, GstSegment * segment, GstClockTime timestamp, guint flags, GstClockTime pending_key_unit_ts) { GstClockTime running_time, stream_time; gboolean all_headers; guint count; GstEvent *event = NULL; g_return_val_if_fail (pending_event != NULL, NULL); g_return_val_if_fail (segment != NULL, NULL); if (pending_event == NULL) goto out; if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) && timestamp == GST_CLOCK_TIME_NONE) goto out; running_time = gst_segment_to_running_time (segment, GST_FORMAT_TIME, timestamp); GST_INFO ("now %" GST_TIME_FORMAT " wanted %" GST_TIME_FORMAT, GST_TIME_ARGS (running_time), GST_TIME_ARGS (pending_key_unit_ts)); if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) && running_time < pending_key_unit_ts) goto out; if (flags & GST_BUFFER_FLAG_DELTA_UNIT) { GST_INFO ("pending force key unit, waiting for keyframe"); goto out; } stream_time = gst_segment_to_stream_time (segment, GST_FORMAT_TIME, timestamp); gst_video_event_parse_upstream_force_key_unit (pending_event, NULL, &all_headers, &count); event = gst_video_event_new_downstream_force_key_unit (timestamp, stream_time, running_time, all_headers, count); gst_event_set_seqnum (event, gst_event_get_seqnum (pending_event)); out: return event; } GstFlowReturn mpegtsmux_clip_inc_running_time (GstCollectPads * pads, GstCollectData * cdata, GstBuffer * buf, GstBuffer ** outbuf, gpointer user_data) { MpegTsPadData *pad_data = (MpegTsPadData *) cdata; GstClockTime time; *outbuf = buf; /* PTS */ time = GST_BUFFER_TIMESTAMP (buf); /* invalid left alone and passed */ if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (time))) { time = gst_segment_to_running_time (&cdata->segment, GST_FORMAT_TIME, time); if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time))) { GST_DEBUG_OBJECT (cdata->pad, "clipping buffer on pad outside segment"); gst_buffer_unref (buf); *outbuf = NULL; } else { GST_LOG_OBJECT (cdata->pad, "buffer pts %" GST_TIME_FORMAT " -> %" GST_TIME_FORMAT " running time", GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (time)); if (GST_CLOCK_TIME_IS_VALID (pad_data->last_pts) && time < pad_data->last_pts) { /* FIXME DTS/PTS mess again; * probably needs a whole lot more subtle handling (cf qtmux) */ GST_DEBUG_OBJECT (cdata->pad, "ignoring PTS going backward"); time = pad_data->last_pts; } else { pad_data->last_pts = time; } *outbuf = gst_buffer_make_writable (buf); GST_BUFFER_TIMESTAMP (*outbuf) = time; } } /* DTS */ time = GST_BUFFER_DTS (buf); /* invalid left alone and passed */ if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (time))) { time = gst_segment_to_running_time (&cdata->segment, GST_FORMAT_TIME, time); /* may have to decode out-of-segment, so pass INVALID */ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time))) { GST_DEBUG_OBJECT (cdata->pad, "running dts outside segment"); } else { GST_LOG_OBJECT (cdata->pad, "buffer dts %" GST_TIME_FORMAT " -> %" GST_TIME_FORMAT " running time", GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (time)); if (GST_CLOCK_TIME_IS_VALID (pad_data->last_dts) && time < pad_data->last_dts) { /* FIXME DTS/PTS mess again; * probably needs a whole lot more subtle handling (cf qtmux) */ GST_WARNING_OBJECT (cdata->pad, "ignoring DTS going backward"); time = pad_data->last_dts; } else { pad_data->last_dts = time; } *outbuf = gst_buffer_make_writable (buf); GST_BUFFER_TIMESTAMP (*outbuf) = time; } } buf = *outbuf; if (pad_data->prepare_func) { MpegTsMux *mux = (MpegTsMux *) user_data; buf = pad_data->prepare_func (buf, pad_data, mux); if (buf) gst_buffer_replace (outbuf, buf); } return GST_FLOW_OK; } static GstFlowReturn mpegtsmux_collected (GstCollectPads * pads, GstCollectData * data, GstBuffer * buf, MpegTsMux * mux) { GstFlowReturn ret = GST_FLOW_OK; MpegTsPadData *best = (MpegTsPadData *) data; GST_DEBUG_OBJECT (mux, "Pads collected"); if (G_UNLIKELY (mux->first)) { ret = mpegtsmux_create_streams (mux); if (G_UNLIKELY (ret != GST_FLOW_OK)) return ret; mpegtsdemux_prepare_srcpad (mux); mux->first = FALSE; } if (best != NULL) { TsMuxProgram *prog = best->prog; gint64 pts = -1; guint64 dts = -1; gboolean delta = TRUE; StreamData *stream_data; if (prog == NULL) goto no_program; g_assert (buf != NULL); if (mux->force_key_unit_event != NULL && best->stream->is_video_stream) { GstEvent *event; event = check_pending_key_unit_event (mux->force_key_unit_event, &best->collect.segment, GST_BUFFER_TIMESTAMP (buf), GST_BUFFER_FLAGS (buf), mux->pending_key_unit_ts); if (event) { GstClockTime running_time; guint count; GList *cur; mux->pending_key_unit_ts = GST_CLOCK_TIME_NONE; gst_event_replace (&mux->force_key_unit_event, NULL); gst_video_event_parse_downstream_force_key_unit (event, NULL, NULL, &running_time, NULL, &count); GST_INFO_OBJECT (mux, "pushing downstream force-key-unit event %d " "%" GST_TIME_FORMAT " count %d", gst_event_get_seqnum (event), GST_TIME_ARGS (running_time), count); gst_pad_push_event (mux->srcpad, event); /* output PAT */ mux->tsmux->last_pat_ts = -1; /* output PMT for each program */ for (cur = mux->tsmux->programs; cur; cur = cur->next) { TsMuxProgram *program = (TsMuxProgram *) cur->data; program->last_pmt_ts = -1; } tsmux_program_set_pcr_stream (prog, NULL); } } if (G_UNLIKELY (prog->pcr_stream == NULL)) { /* Take the first data stream for the PCR */ GST_DEBUG_OBJECT (COLLECT_DATA_PAD (best), "Use stream (pid=%d) from pad as PCR for program (prog_id = %d)", MPEG_TS_PAD_DATA (best)->pid, MPEG_TS_PAD_DATA (best)->prog_id); /* Set the chosen PCR stream */ tsmux_program_set_pcr_stream (prog, best->stream); } GST_DEBUG_OBJECT (COLLECT_DATA_PAD (best), "Chose stream for output (PID: 0x%04x)", best->pid); if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_PTS (buf)) && GST_CLOCK_TIME_IS_VALID (best->last_pts)) { pts = GSTTIME_TO_MPEGTIME (best->last_pts); GST_DEBUG_OBJECT (mux, "Buffer has PTS %" GST_TIME_FORMAT " pts %" G_GINT64_FORMAT, GST_TIME_ARGS (best->last_pts), pts); } if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DTS (buf)) && GST_CLOCK_TIME_IS_VALID (best->last_dts)) { pts = GSTTIME_TO_MPEGTIME (best->last_dts); GST_DEBUG_OBJECT (mux, "Buffer has DTS %" GST_TIME_FORMAT " dts %" G_GINT64_FORMAT, GST_TIME_ARGS (best->last_dts), dts); } /* should not have a DTS without PTS */ if (pts == -1 && dts != -1) { GST_DEBUG_OBJECT (mux, "using DTS for unknown PTS"); pts = dts; } if (best->stream->is_video_stream) { delta = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT); #if 0 GST_OBJECT_LOCK (mux); if (mux->element_index && !delta && best->element_index_writer_id != -1) { gst_index_add_association (mux->element_index, best->element_index_writer_id, GST_ASSOCIATION_FLAG_KEY_UNIT, spn_format, mux->spn_count, pts_format, pts, NULL); } GST_OBJECT_UNLOCK (mux); #endif } GST_DEBUG_OBJECT (mux, "delta: %d", delta); stream_data = stream_data_new (buf); tsmux_stream_add_data (best->stream, stream_data->map_info.data, stream_data->map_info.size, stream_data, pts, dts, !delta); /* outgoing ts follows ts of PCR program stream */ if (prog->pcr_stream == best->stream) { /* prefer DTS if present for PCR as it should be monotone */ mux->last_ts = GST_CLOCK_TIME_IS_VALID (best->last_dts) ? best->last_dts : best-> last_pts; } mux->is_delta = delta; mux->last_size = stream_data->map_info.size; while (tsmux_stream_bytes_in_buffer (best->stream) > 0) { if (!tsmux_write_stream_packet (mux->tsmux, best->stream)) { /* Failed writing data for some reason. Set appropriate error */ GST_DEBUG_OBJECT (mux, "Failed to write data packet"); GST_ELEMENT_ERROR (mux, STREAM, MUX, ("Failed writing output data to stream %04x", best->stream->id), (NULL)); goto write_fail; } } /* flush packet cache */ mpegtsmux_push_packets (mux, FALSE); } else { /* EOS */ /* drain some possibly cached data */ new_packet_m2ts (mux, NULL, -1); mpegtsmux_push_packets (mux, TRUE); gst_pad_push_event (mux->srcpad, gst_event_new_eos ()); } return ret; /* ERRORS */ write_fail: { return mux->last_flow_ret; } no_program: { GST_ELEMENT_ERROR (mux, STREAM, MUX, ("Stream on pad %" GST_PTR_FORMAT " is not associated with any program", COLLECT_DATA_PAD (best)), (NULL)); return GST_FLOW_ERROR; } } static GstPad * mpegtsmux_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * name, const GstCaps * caps) { MpegTsMux *mux = GST_MPEG_TSMUX (element); gint pid = -1; gchar *pad_name = NULL; GstPad *pad = NULL; MpegTsPadData *pad_data = NULL; if (name != NULL && sscanf (name, "sink_%d", &pid) == 1) { if (tsmux_find_stream (mux->tsmux, pid)) goto stream_exists; } else { pid = tsmux_get_new_pid (mux->tsmux); } pad_name = g_strdup_printf ("sink_%d", pid); pad = gst_pad_new_from_template (templ, pad_name); g_free (pad_name); pad_data = (MpegTsPadData *) gst_collect_pads_add_pad (mux->collect, pad, sizeof (MpegTsPadData), (GstCollectDataDestroyNotify) (mpegtsmux_pad_reset), TRUE); if (pad_data == NULL) goto pad_failure; mpegtsmux_pad_reset (pad_data); pad_data->pid = pid; if (G_UNLIKELY (!gst_element_add_pad (element, pad))) goto could_not_add; return pad; /* ERRORS */ stream_exists: { GST_ELEMENT_ERROR (element, STREAM, MUX, ("Duplicate PID requested"), (NULL)); return NULL; } could_not_add: { GST_ELEMENT_ERROR (element, STREAM, FAILED, ("Internal data stream error."), ("Could not add pad to element")); gst_collect_pads_remove_pad (mux->collect, pad); gst_object_unref (pad); return NULL; } pad_failure: { GST_ELEMENT_ERROR (element, STREAM, FAILED, ("Internal data stream error."), ("Could not add pad to collectpads")); gst_object_unref (pad); return NULL; } } static void mpegtsmux_release_pad (GstElement * element, GstPad * pad) { MpegTsMux *mux = GST_MPEG_TSMUX (element); GST_DEBUG_OBJECT (mux, "Pad %" GST_PTR_FORMAT " being released", pad); if (mux->collect) { gst_collect_pads_remove_pad (mux->collect, pad); } /* chain up */ gst_element_remove_pad (element, pad); } static void new_packet_common_init (MpegTsMux * mux, GstBuffer * buf, guint8 * data, guint len) { /* Packets should be at least 188 bytes, but check anyway */ g_return_if_fail (len >= 2 || !data); if (!mux->streamheader_sent && data) { guint pid = ((data[1] & 0x1f) << 8) | data[2]; /* if it's a PAT or a PMT */ if (pid == 0x00 || (pid >= TSMUX_START_PMT_PID && pid < TSMUX_START_ES_PID)) { GstBuffer *hbuf; if (!buf) { hbuf = gst_buffer_new_and_alloc (len); gst_buffer_fill (hbuf, 0, data, len); } else { hbuf = gst_buffer_copy (buf); } mux->streamheader = g_list_append (mux->streamheader, hbuf); } else if (mux->streamheader) { mpegtsdemux_set_header_on_caps (mux); mux->streamheader_sent = TRUE; } } if (buf) { if (mux->is_delta) { GST_LOG_OBJECT (mux, "marking as delta unit"); GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT); } else { GST_DEBUG_OBJECT (mux, "marking as non-delta unit"); mux->is_delta = TRUE; } } } static GstFlowReturn mpegtsmux_push_packets (MpegTsMux * mux, gboolean force) { gint align = mux->alignment; gint av, packet_size; GstBuffer *buf; GstFlowReturn ret = GST_FLOW_OK; GstClockTime ts; if (mux->m2ts_mode) { packet_size = M2TS_PACKET_LENGTH; if (align < 0) align = 32; } else { packet_size = NORMAL_TS_PACKET_LENGTH; if (align < 0) align = 0; } av = gst_adapter_available (mux->out_adapter); GST_LOG_OBJECT (mux, "align %d, av %d", align, av); if (!align) align = av; else align *= packet_size; GST_LOG_OBJECT (mux, "aligning to %d bytes", align); if (G_LIKELY ((align <= av) && av)) { GST_LOG_OBJECT (mux, "pushing %d aligned bytes", av - (av % align)); ts = gst_adapter_prev_timestamp (mux->out_adapter, NULL); buf = gst_adapter_take_buffer (mux->out_adapter, av - (av % align)); g_assert (buf); GST_BUFFER_TIMESTAMP (buf) = ts; ret = gst_pad_push (mux->srcpad, buf); av = av % align; } if (av && force) { guint8 *data; guint32 header; gint dummy; GstMapInfo map; GST_LOG_OBJECT (mux, "handling %d leftover bytes", av); buf = gst_buffer_new_and_alloc (align); gst_buffer_map (buf, &map, GST_MAP_READ); data = map.data; ts = gst_adapter_prev_timestamp (mux->out_adapter, NULL); gst_adapter_copy (mux->out_adapter, data, 0, av); gst_adapter_clear (mux->out_adapter); GST_BUFFER_TIMESTAMP (buf) = ts; data += av; header = GST_READ_UINT32_BE (data - packet_size); dummy = (map.size - av) / packet_size; GST_LOG_OBJECT (mux, "adding %d null packets", dummy); for (; dummy > 0; dummy--) { gint offset; if (packet_size > NORMAL_TS_PACKET_LENGTH) { GST_WRITE_UINT32_BE (data, header); /* simply increase header a bit and never mind too much */ header++; offset = 4; } else { offset = 0; } GST_WRITE_UINT8 (data + offset, TSMUX_SYNC_BYTE); /* null packet PID */ GST_WRITE_UINT16_BE (data + offset + 1, 0x1FFF); /* no adaptation field exists | continuity counter undefined */ GST_WRITE_UINT8 (data + offset + 3, 0x10); /* payload */ memset (data + offset + 4, 0, NORMAL_TS_PACKET_LENGTH - 4); data += packet_size; } gst_buffer_unmap (buf, &map); ret = gst_pad_push (mux->srcpad, buf); } return ret; } static GstFlowReturn mpegtsmux_collect_packet (MpegTsMux * mux, GstBuffer * buf) { GST_LOG_OBJECT (mux, "collecting packet size %" G_GSIZE_FORMAT, gst_buffer_get_size (buf)); gst_adapter_push (mux->out_adapter, buf); return GST_FLOW_OK; } static gboolean new_packet_m2ts (MpegTsMux * mux, GstBuffer * buf, gint64 new_pcr) { GstBuffer *out_buf; int chunk_bytes; GstMapInfo map; GST_LOG_OBJECT (mux, "Have buffer %p with new_pcr=%" G_GINT64_FORMAT, buf, new_pcr); chunk_bytes = gst_adapter_available (mux->adapter); if (G_LIKELY (buf)) { if (new_pcr < 0) { /* If there is no pcr in current ts packet then just add the packet to the adapter for later output when we see a PCR */ GST_LOG_OBJECT (mux, "Accumulating non-PCR packet"); gst_adapter_push (mux->adapter, buf); goto exit; } /* no first interpolation point yet, then this is the one, * otherwise it is the second interpolation point */ if (mux->previous_pcr < 0 && chunk_bytes) { mux->previous_pcr = new_pcr; mux->previous_offset = chunk_bytes; GST_LOG_OBJECT (mux, "Accumulating non-PCR packet"); gst_adapter_push (mux->adapter, buf); goto exit; } } else { g_assert (new_pcr == -1); } /* interpolate if needed, and 2 points available */ if (chunk_bytes && (new_pcr != mux->previous_pcr)) { gint64 offset = 0; GST_LOG_OBJECT (mux, "Processing pending packets; " "previous pcr %" G_GINT64_FORMAT ", previous offset %d, " "current pcr %" G_GINT64_FORMAT ", current offset %d", mux->previous_pcr, (gint) mux->previous_offset, new_pcr, (gint) chunk_bytes); g_assert (chunk_bytes > mux->previous_offset); /* if draining, use previous rate */ if (G_LIKELY (new_pcr > 0)) { mux->pcr_rate_num = new_pcr - mux->previous_pcr; mux->pcr_rate_den = chunk_bytes - mux->previous_offset; } while (offset < chunk_bytes) { guint64 cur_pcr, ts; /* Loop, pulling packets of the adapter, updating their 4 byte * timestamp header and pushing */ /* interpolate PCR */ if (G_LIKELY (offset >= mux->previous_offset)) cur_pcr = mux->previous_pcr + gst_util_uint64_scale (offset - mux->previous_offset, mux->pcr_rate_num, mux->pcr_rate_den); else cur_pcr = mux->previous_pcr - gst_util_uint64_scale (mux->previous_offset - offset, mux->pcr_rate_num, mux->pcr_rate_den); ts = gst_adapter_prev_timestamp (mux->adapter, NULL); out_buf = gst_adapter_take_buffer (mux->adapter, M2TS_PACKET_LENGTH); g_assert (out_buf); offset += M2TS_PACKET_LENGTH; GST_BUFFER_TIMESTAMP (out_buf) = ts; gst_buffer_map (out_buf, &map, GST_MAP_WRITE); /* The header is the bottom 30 bits of the PCR, apparently not * encoded into base + ext as in the packets themselves */ GST_WRITE_UINT32_BE (map.data, cur_pcr & 0x3FFFFFFF); gst_buffer_unmap (out_buf, &map); GST_LOG_OBJECT (mux, "Outputting a packet of length %d PCR %" G_GUINT64_FORMAT, M2TS_PACKET_LENGTH, cur_pcr); mpegtsmux_collect_packet (mux, out_buf); } } if (G_UNLIKELY (!buf)) goto exit; gst_buffer_map (buf, &map, GST_MAP_WRITE); /* Finally, output the passed in packet */ /* Only write the bottom 30 bits of the PCR */ GST_WRITE_UINT32_BE (map.data, new_pcr & 0x3FFFFFFF); gst_buffer_unmap (buf, &map); GST_LOG_OBJECT (mux, "Outputting a packet of length %d PCR %" G_GUINT64_FORMAT, M2TS_PACKET_LENGTH, new_pcr); mpegtsmux_collect_packet (mux, buf); if (new_pcr != mux->previous_pcr) { mux->previous_pcr = new_pcr; mux->previous_offset = -M2TS_PACKET_LENGTH; } exit: return TRUE; } /* Called when the TsMux has prepared a packet for output. Return FALSE * on error */ static gboolean new_packet_cb (GstBuffer * buf, void *user_data, gint64 new_pcr) { MpegTsMux *mux = (MpegTsMux *) user_data; gint offset = 0; GstMapInfo map; #if 0 GST_LOG_OBJECT (mux, "handling packet %d", mux->spn_count); mux->spn_count++; #endif if (mux->m2ts_mode) { offset = 4; gst_buffer_set_size (buf, NORMAL_TS_PACKET_LENGTH + offset); } gst_buffer_map (buf, &map, GST_MAP_READWRITE); if (offset) { /* there should be a better way to do this */ memmove (map.data + offset, map.data, map.size - offset); } GST_BUFFER_PTS (buf) = mux->last_ts; /* do common init (flags and streamheaders) */ new_packet_common_init (mux, buf, map.data + offset, map.size); gst_buffer_unmap (buf, &map); /* all is meant for downstream, including any prefix */ if (offset) return new_packet_m2ts (mux, buf, new_pcr); else mpegtsmux_collect_packet (mux, buf); return TRUE; } /* called when TsMux needs new packet to write into */ static void alloc_packet_cb (GstBuffer ** _buf, void *user_data) { MpegTsMux *mux = (MpegTsMux *) user_data; GstBuffer *buf; gint offset = 0; if (mux->m2ts_mode == TRUE) offset = 4; buf = gst_buffer_new_and_alloc (NORMAL_TS_PACKET_LENGTH + offset); gst_buffer_set_size (buf, NORMAL_TS_PACKET_LENGTH); *_buf = buf; } static void mpegtsdemux_set_header_on_caps (MpegTsMux * mux) { GstBuffer *buf; GstStructure *structure; GValue array = { 0 }; GValue value = { 0 }; GstCaps *caps; GList *sh; caps = gst_caps_make_writable (gst_pad_get_current_caps (mux->srcpad)); structure = gst_caps_get_structure (caps, 0); g_value_init (&array, GST_TYPE_ARRAY); sh = mux->streamheader; while (sh) { buf = sh->data; g_value_init (&value, GST_TYPE_BUFFER); gst_value_take_buffer (&value, buf); gst_value_array_append_value (&array, &value); g_value_unset (&value); sh = g_list_next (sh); } g_list_free (mux->streamheader); mux->streamheader = NULL; gst_structure_set_value (structure, "streamheader", &array); gst_pad_set_caps (mux->srcpad, caps); g_value_unset (&array); gst_caps_unref (caps); } static void mpegtsdemux_prepare_srcpad (MpegTsMux * mux) { GstSegment seg; /* we are not going to seek */ GstEvent *new_seg; GstCaps *caps = gst_caps_new_simple ("video/mpegts", "systemstream", G_TYPE_BOOLEAN, TRUE, "packetsize", G_TYPE_INT, (mux->m2ts_mode ? M2TS_PACKET_LENGTH : NORMAL_TS_PACKET_LENGTH), NULL); gst_segment_init (&seg, GST_FORMAT_TIME); new_seg = gst_event_new_segment (&seg); /* Set caps on src pad from our template and push new segment */ gst_pad_set_caps (mux->srcpad, caps); gst_caps_unref (caps); if (!gst_pad_push_event (mux->srcpad, new_seg)) { GST_WARNING_OBJECT (mux, "New segment event was not handled downstream"); } } static GstStateChangeReturn mpegtsmux_change_state (GstElement * element, GstStateChange transition) { MpegTsMux *mux = GST_MPEG_TSMUX (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: gst_collect_pads_start (mux->collect); break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; case GST_STATE_CHANGE_PAUSED_TO_READY: gst_collect_pads_stop (mux->collect); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: mpegtsmux_reset (mux, TRUE); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; } static gboolean plugin_init (GstPlugin * plugin) { if (!gst_element_register (plugin, "mpegtsmux", GST_RANK_PRIMARY, mpegtsmux_get_type ())) return FALSE; GST_DEBUG_CATEGORY_INIT (mpegtsmux_debug, "mpegtsmux", 0, "MPEG Transport Stream muxer"); return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, mpegtsmux, "MPEG-TS muxer", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);