/* * 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 #include #include "mpegtsmux.h" #include "mpegtsmux_h264.h" #include "mpegtsmux_aac.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 }; 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, 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 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_dispose (GObject * object); static gboolean new_packet_cb (guint8 * data, guint len, void *user_data, gint64 new_pcr); static void release_buffer_cb (guint8 * data, void *user_data); static void mpegtsdemux_prepare_srcpad (MpegTsMux * mux); static GstFlowReturn mpegtsmux_collected (GstCollectPads * pads, MpegTsMux * mux); static GstPad *mpegtsmux_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * name); 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_sink_event (GstPad * pad, GstEvent * event); static gboolean mpegtsmux_src_event (GstPad * pad, GstEvent * event); GST_BOILERPLATE (MpegTsMux, mpegtsmux, GstElement, GST_TYPE_ELEMENT); static void mpegtsmux_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_static_pad_template (element_class, &mpegtsmux_sink_factory); gst_element_class_add_static_pad_template (element_class, &mpegtsmux_src_factory); gst_element_class_set_details_simple (element_class, "MPEG Transport Stream Muxer", "Codec/Muxer", "Multiplexes media streams into an MPEG Transport Stream", "Fluendo "); } static void mpegtsmux_class_init (MpegTsMuxClass * klass) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); GObjectClass *gobject_class = G_OBJECT_CLASS (klass); 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; 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.", FALSE, 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)); } static void mpegtsmux_init (MpegTsMux * mux, MpegTsMuxClass * g_class) { 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, mpegtsmux_src_event); gst_element_add_pad (GST_ELEMENT (mux), mux->srcpad); mux->collect = gst_collect_pads_new (); gst_collect_pads_set_function (mux->collect, (GstCollectPadsFunction) GST_DEBUG_FUNCPTR (mpegtsmux_collected), mux); mux->tsmux = tsmux_new (); tsmux_set_write_func (mux->tsmux, new_packet_cb, mux); mux->programs = g_new0 (TsMuxProgram *, MAX_PROG_NUMBER); mux->first = TRUE; mux->last_flow_ret = GST_FLOW_OK; mux->adapter = gst_adapter_new (); mux->m2ts_mode = FALSE; mux->pat_interval = TSMUX_DEFAULT_PAT_INTERVAL; mux->pmt_interval = TSMUX_DEFAULT_PMT_INTERVAL; mux->first_pcr = TRUE; mux->last_ts = 0; mux->is_delta = TRUE; mux->prog_map = NULL; mux->streamheader = NULL; mux->streamheader_sent = FALSE; mux->force_key_unit_event = NULL; mux->pending_key_unit_ts = GST_CLOCK_TIME_NONE; } static void mpegtsmux_dispose (GObject * object) { MpegTsMux *mux = GST_MPEG_TSMUX (object); if (mux->adapter) { gst_adapter_clear (mux->adapter); g_object_unref (mux->adapter); mux->adapter = NULL; } if (mux->collect) { gst_object_unref (mux->collect); mux->collect = NULL; } if (mux->tsmux) { tsmux_free (mux->tsmux); mux->tsmux = NULL; } if (mux->prog_map) { gst_structure_free (mux->prog_map); mux->prog_map = NULL; } if (mux->programs) { g_free (mux->programs); mux->programs = 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_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; 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; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void release_buffer_cb (guint8 * data, void *user_data) { GstBuffer *buf = (GstBuffer *) user_data; gst_buffer_unref (buf); } static GstFlowReturn mpegtsmux_create_stream (MpegTsMux * mux, MpegTsPadData * ts_data, GstPad * pad) { GstFlowReturn ret = GST_FLOW_ERROR; GstCaps *caps = gst_pad_get_negotiated_caps (pad); GstStructure *s; if (caps == NULL) { GST_DEBUG_OBJECT (pad, "Sink pad caps were not set before pushing"); return GST_FLOW_NOT_NEGOTIATED; } s = gst_caps_get_structure (caps, 0); g_return_val_if_fail (s != NULL, FALSE); if (gst_structure_has_name (s, "video/x-dirac")) { GST_DEBUG_OBJECT (pad, "Creating Dirac stream with PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_VIDEO_DIRAC, ts_data->pid); } else if (gst_structure_has_name (s, "audio/x-ac3")) { GST_DEBUG_OBJECT (pad, "Creating AC3 stream with PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_PS_AUDIO_AC3, ts_data->pid); } else if (gst_structure_has_name (s, "audio/x-dts")) { GST_DEBUG_OBJECT (pad, "Creating DTS stream with PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_PS_AUDIO_DTS, ts_data->pid); } else if (gst_structure_has_name (s, "audio/x-lpcm")) { GST_DEBUG_OBJECT (pad, "Creating LPCM stream with PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_PS_AUDIO_LPCM, ts_data->pid); } else if (gst_structure_has_name (s, "video/x-h264")) { const GValue *value; GST_DEBUG_OBJECT (pad, "Creating H264 stream with PID 0x%04x", ts_data->pid); /* Codec data contains SPS/PPS which need to go in stream for valid ES */ value = gst_structure_get_value (s, "codec_data"); if (value) { ts_data->codec_data = gst_buffer_ref (gst_value_get_buffer (value)); GST_DEBUG_OBJECT (pad, "we have additional codec data (%d bytes)", GST_BUFFER_SIZE (ts_data->codec_data)); ts_data->prepare_func = mpegtsmux_prepare_h264; ts_data->free_func = mpegtsmux_free_h264; } else { ts_data->codec_data = NULL; } ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_VIDEO_H264, ts_data->pid); } else if (gst_structure_has_name (s, "audio/mpeg")) { gint mpegversion; if (!gst_structure_get_int (s, "mpegversion", &mpegversion)) { GST_ELEMENT_ERROR (pad, STREAM, FORMAT, ("Invalid data format presented"), ("Caps with type audio/mpeg did not have mpegversion")); goto beach; } switch (mpegversion) { case 1: GST_DEBUG_OBJECT (pad, "Creating MPEG Audio, version 1 stream with " "PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_AUDIO_MPEG1, ts_data->pid); break; case 2: GST_DEBUG_OBJECT (pad, "Creating MPEG Audio, version 2 stream with " "PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_AUDIO_MPEG2, ts_data->pid); break; case 4: { const GValue *value; /* Codec data contains SPS/PPS which need to go in stream for valid ES */ value = gst_structure_get_value (s, "codec_data"); if (value) { ts_data->codec_data = gst_buffer_ref (gst_value_get_buffer (value)); GST_DEBUG_OBJECT (pad, "we have additional codec data (%d bytes)", GST_BUFFER_SIZE (ts_data->codec_data)); ts_data->prepare_func = mpegtsmux_prepare_aac; } else { ts_data->codec_data = NULL; } GST_DEBUG_OBJECT (pad, "Creating MPEG Audio, version 4 stream with " "PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_AUDIO_AAC, ts_data->pid); break; } default: GST_WARNING_OBJECT (pad, "unsupported mpegversion %d", mpegversion); goto beach; } } else if (gst_structure_has_name (s, "video/mpeg")) { gint mpegversion; if (!gst_structure_get_int (s, "mpegversion", &mpegversion)) { GST_ELEMENT_ERROR (mux, STREAM, FORMAT, ("Invalid data format presented"), ("Caps with type video/mpeg did not have mpegversion")); goto beach; } if (mpegversion == 1) { GST_DEBUG_OBJECT (pad, "Creating MPEG Video, version 1 stream with PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_VIDEO_MPEG1, ts_data->pid); } else if (mpegversion == 2) { GST_DEBUG_OBJECT (pad, "Creating MPEG Video, version 2 stream with PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_VIDEO_MPEG2, ts_data->pid); } else { GST_DEBUG_OBJECT (pad, "Creating MPEG Video, version 4 stream with PID 0x%04x", ts_data->pid); ts_data->stream = tsmux_create_stream (mux->tsmux, TSMUX_ST_VIDEO_MPEG4, ts_data->pid); } } 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; } beach: gst_caps_unref (caps); return ret; } 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, c_data->pad); if (ret != GST_FLOW_OK) goto no_stream; } } return GST_FLOW_OK; 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; } static MpegTsPadData * mpegtsmux_choose_best_stream (MpegTsMux * mux) { MpegTsPadData *best = NULL; GstCollectData *c_best = NULL; GSList *walk; for (walk = mux->collect->data; walk != NULL; walk = g_slist_next (walk)) { GstCollectData *c_data = (GstCollectData *) walk->data; MpegTsPadData *ts_data = (MpegTsPadData *) walk->data; if (ts_data->eos == FALSE) { if (ts_data->queued_buf == NULL) { GstBuffer *buf; ts_data->queued_buf = buf = gst_collect_pads_peek (mux->collect, c_data); if (buf != NULL) { if (ts_data->prepare_func) { buf = ts_data->prepare_func (buf, ts_data, mux); if (buf) { /* Take the prepared buffer instead */ gst_buffer_unref (ts_data->queued_buf); ts_data->queued_buf = buf; } else { /* If data preparation returned NULL, use unprepared one */ buf = ts_data->queued_buf; } } if (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) { /* Ignore timestamps that go backward for now. FIXME: Handle all * incoming PTS */ if (ts_data->last_ts == GST_CLOCK_TIME_NONE || ts_data->last_ts < GST_BUFFER_TIMESTAMP (buf)) { ts_data->cur_ts = ts_data->last_ts = gst_segment_to_running_time (&c_data->segment, GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf)); } else { GST_DEBUG_OBJECT (mux, "Ignoring PTS that has gone backward"); } } else ts_data->cur_ts = GST_CLOCK_TIME_NONE; GST_DEBUG_OBJECT (mux, "Pulled buffer with ts %" GST_TIME_FORMAT " (uncorrected ts %" GST_TIME_FORMAT " %" G_GUINT64_FORMAT ") for PID 0x%04x", GST_TIME_ARGS (ts_data->cur_ts), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_BUFFER_TIMESTAMP (buf), ts_data->pid); /* Choose a stream we've never seen a timestamp for to ensure * we push enough buffers from it to reach a timestamp */ if (ts_data->last_ts == GST_CLOCK_TIME_NONE) { best = ts_data; c_best = c_data; } } else { ts_data->eos = TRUE; continue; } } /* If we don't yet have a best pad, take this one, otherwise take * whichever has the oldest timestamp */ if (best != NULL) { if (ts_data->last_ts != GST_CLOCK_TIME_NONE && best->last_ts != GST_CLOCK_TIME_NONE && ts_data->last_ts < best->last_ts) { best = ts_data; c_best = c_data; } } else { best = ts_data; c_best = c_data; } } } if (c_best) { GstBuffer *buffer; if ((buffer = gst_collect_pads_pop (mux->collect, c_best))) gst_buffer_unref (buffer); } return best; } #define COLLECT_DATA_PAD(collect_data) (((GstCollectData *)(collect_data))->pad) static MpegTsPadData * find_pad_data (MpegTsMux * mux, GstPad * pad) { GSList *walk; MpegTsPadData *ts_data = NULL; GST_COLLECT_PADS_PAD_LOCK (mux->collect); walk = mux->collect->abidata.ABI.pad_list; while (walk) { if (((GstCollectData *) walk->data)->pad == pad) { ts_data = (MpegTsPadData *) walk->data; break; } walk = g_slist_next (walk); } GST_COLLECT_PADS_PAD_UNLOCK (mux->collect); return ts_data; } static gboolean mpegtsmux_sink_event (GstPad * pad, GstEvent * event) { MpegTsMux *mux = GST_MPEG_TSMUX (gst_pad_get_parent (pad)); MpegTsPadData *ts_data; gboolean res = TRUE; gboolean forward = TRUE; ts_data = find_pad_data (mux, 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; 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) res = ts_data->eventfunc (pad, event); gst_object_unref (mux); return res; } static gboolean mpegtsmux_src_event (GstPad * pad, GstEvent * event) { MpegTsMux *mux = GST_MPEG_TSMUX (gst_pad_get_parent (pad)); gboolean res = TRUE; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CUSTOM_UPSTREAM: { GstIterator *iter; GstIteratorResult iter_ret; GstPad *sinkpad; GstClockTime running_time; gboolean all_headers, done; guint count; if (!gst_video_event_is_force_key_unit (event)) break; 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, (gpointer *) & sinkpad); 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; gst_object_unref (sinkpad); break; case GST_ITERATOR_ERROR: done = TRUE; break; case GST_ITERATOR_RESYNC: break; } } gst_event_unref (event); break; } default: res = gst_pad_event_default (pad, event); break; } 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; } static GstFlowReturn mpegtsmux_collected (GstCollectPads * pads, MpegTsMux * mux) { GstFlowReturn ret = GST_FLOW_OK; MpegTsPadData *best = NULL; 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; } best = mpegtsmux_choose_best_stream (mux); if (best != NULL) { TsMuxProgram *prog = best->prog; GstBuffer *buf = best->queued_buf; gint64 pts = -1; gboolean delta = TRUE; if (prog == NULL) { 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; } if (mux->force_key_unit_event != NULL) { 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 = g_list_first (mux->tsmux->programs); cur != NULL; cur = g_list_next (cur)) { TsMuxProgram *program = (TsMuxProgram *) cur->data; program->last_pmt_ts = -1; } } } 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); } g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR); if (best->stream->is_video_stream) delta = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT); GST_DEBUG_OBJECT (mux, "delta: %d", delta); GST_DEBUG_OBJECT (COLLECT_DATA_PAD (best), "Chose stream for output (PID: 0x%04x)", best->pid); if (GST_CLOCK_TIME_IS_VALID (best->cur_ts)) { pts = GSTTIME_TO_MPEGTIME (best->cur_ts); GST_DEBUG_OBJECT (mux, "Buffer has TS %" GST_TIME_FORMAT " pts %" G_GINT64_FORMAT, GST_TIME_ARGS (best->cur_ts), pts); } tsmux_stream_add_data (best->stream, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), buf, pts, -1, !delta); best->queued_buf = NULL; mux->is_delta = delta; 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; } } if (prog->pcr_stream == best->stream) { mux->last_ts = best->last_ts; } } else { /* FIXME: Drain all remaining streams */ /* At EOS */ gst_pad_push_event (mux->srcpad, gst_event_new_eos ()); } return ret; write_fail: return mux->last_flow_ret; } static GstPad * mpegtsmux_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * name) { 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)); if (pad_data == NULL) goto pad_failure; pad_data->eventfunc = pad->eventfunc; gst_pad_set_event_function (pad, mpegtsmux_sink_event); pad_data->pid = pid; pad_data->last_ts = GST_CLOCK_TIME_NONE; pad_data->codec_data = NULL; pad_data->prepare_data = NULL; pad_data->prepare_func = NULL; pad_data->free_func = NULL; pad_data->prog_id = -1; pad_data->prog = NULL; if (G_UNLIKELY (!gst_element_add_pad (element, pad))) goto could_not_add; return pad; 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); if (!mux->streamheader_sent) { 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)) { mux->streamheader = g_list_append (mux->streamheader, gst_buffer_copy (buf)); } else if (mux->streamheader) { mpegtsdemux_set_header_on_caps (mux); mux->streamheader_sent = TRUE; } } /* Set the caps on the buffer only after possibly setting the stream headers * into the pad caps above */ gst_buffer_set_caps (buf, GST_PAD_CAPS (mux->srcpad)); 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 gboolean new_packet_m2ts (MpegTsMux * mux, guint8 * data, guint len, gint64 new_pcr) { GstBuffer *buf, *out_buf; GstFlowReturn ret; int chunk_bytes; GST_LOG_OBJECT (mux, "Have buffer with new_pcr=%" G_GINT64_FORMAT " size %d", new_pcr, len); buf = gst_buffer_new_and_alloc (M2TS_PACKET_LENGTH); if (G_UNLIKELY (buf == NULL)) { GST_ELEMENT_ERROR (mux, STREAM, MUX, ("Failed allocating output buffer"), (NULL)); mux->last_flow_ret = GST_FLOW_ERROR; return FALSE; } new_packet_common_init (mux, buf, data, len); /* copies the TS data of 188 bytes to the m2ts buffer at an offset of 4 bytes to leave space for writing the timestamp later */ memcpy (GST_BUFFER_DATA (buf) + 4, data, len); if (new_pcr < 0) { /* If theres 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); return TRUE; } chunk_bytes = gst_adapter_available (mux->adapter); /* We have a new PCR, output anything in the adapter */ if (mux->first_pcr) { /* We can't generate sensible timestamps for anything that might * be in the adapter preceding the first PCR and will hit a divide * by zero, so empty the adapter. This is probably a null op. */ gst_adapter_clear (mux->adapter); /* Warn if we threw anything away */ if (chunk_bytes) { GST_ELEMENT_WARNING (mux, STREAM, MUX, ("Discarding %d bytes from stream preceding first PCR", chunk_bytes / M2TS_PACKET_LENGTH * NORMAL_TS_PACKET_LENGTH), (NULL)); chunk_bytes = 0; } mux->first_pcr = FALSE; } if (chunk_bytes) { /* Start the PCR offset counting at 192 bytes: At the end of the packet * that had the last PCR */ guint64 pcr_bytes = M2TS_PACKET_LENGTH, ts_rate; /* Include the pending packet size to get the ts_rate right */ chunk_bytes += M2TS_PACKET_LENGTH; /* calculate rate based on latest and previous pcr values */ ts_rate = gst_util_uint64_scale (chunk_bytes, CLOCK_FREQ_SCR, (new_pcr - mux->previous_pcr)); GST_LOG_OBJECT (mux, "Processing pending packets with ts_rate %" G_GUINT64_FORMAT, ts_rate); while (1) { guint64 cur_pcr; /* Loop, pulling packets of the adapter, updating their 4 byte * timestamp header and pushing */ /* The header is the bottom 30 bits of the PCR, apparently not * encoded into base + ext as in the packets themselves, so * we can just interpolate, mask and insert */ cur_pcr = (mux->previous_pcr + gst_util_uint64_scale (pcr_bytes, CLOCK_FREQ_SCR, ts_rate)); out_buf = gst_adapter_take_buffer (mux->adapter, M2TS_PACKET_LENGTH); if (G_UNLIKELY (!out_buf)) break; gst_buffer_set_caps (out_buf, GST_PAD_CAPS (mux->srcpad)); GST_BUFFER_TIMESTAMP (out_buf) = MPEG_SYS_TIME_TO_GSTTIME (cur_pcr); /* Write the 4 byte timestamp value, bottom 30 bits only = PCR */ GST_WRITE_UINT32_BE (GST_BUFFER_DATA (out_buf), cur_pcr & 0x3FFFFFFF); GST_LOG_OBJECT (mux, "Outputting a packet of length %d PCR %" G_GUINT64_FORMAT, M2TS_PACKET_LENGTH, cur_pcr); ret = gst_pad_push (mux->srcpad, out_buf); if (G_UNLIKELY (ret != GST_FLOW_OK)) { mux->last_flow_ret = ret; return FALSE; } pcr_bytes += M2TS_PACKET_LENGTH; } } /* Finally, output the passed in packet */ /* Only write the bottom 30 bits of the PCR */ GST_WRITE_UINT32_BE (GST_BUFFER_DATA (buf), new_pcr & 0x3FFFFFFF); GST_BUFFER_TIMESTAMP (buf) = MPEG_SYS_TIME_TO_GSTTIME (new_pcr); GST_LOG_OBJECT (mux, "Outputting a packet of length %d PCR %" G_GUINT64_FORMAT, M2TS_PACKET_LENGTH, new_pcr); ret = gst_pad_push (mux->srcpad, buf); if (G_UNLIKELY (ret != GST_FLOW_OK)) { mux->last_flow_ret = ret; return FALSE; } mux->previous_pcr = new_pcr; return TRUE; } static gboolean new_packet_normal_ts (MpegTsMux * mux, guint8 * data, guint len, gint64 new_pcr) { GstBuffer *buf; GstFlowReturn ret; /* Output a normal TS packet */ GST_LOG_OBJECT (mux, "Outputting a packet of length %d", len); buf = gst_buffer_new_and_alloc (len); if (G_UNLIKELY (buf == NULL)) { mux->last_flow_ret = GST_FLOW_ERROR; return FALSE; } new_packet_common_init (mux, buf, data, len); memcpy (GST_BUFFER_DATA (buf), data, len); GST_BUFFER_TIMESTAMP (buf) = mux->last_ts; ret = gst_pad_push (mux->srcpad, buf); if (G_UNLIKELY (ret != GST_FLOW_OK)) { mux->last_flow_ret = ret; return FALSE; } return TRUE; } static gboolean new_packet_cb (guint8 * data, guint len, void *user_data, gint64 new_pcr) { /* Called when the TsMux has prepared a packet for output. Return FALSE * on error */ MpegTsMux *mux = (MpegTsMux *) user_data; if (mux->m2ts_mode == TRUE) { return new_packet_m2ts (mux, data, len, new_pcr); } return new_packet_normal_ts (mux, data, len, new_pcr); } 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_copy (GST_PAD_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; GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_IN_CAPS); 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) { GstEvent *new_seg = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0); 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); /* 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: if (mux->adapter) gst_adapter_clear (mux->adapter); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { 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);