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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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And fix writing of dual-mono special cases. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4180>
414 lines
14 KiB
C
414 lines
14 KiB
C
/*
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* Copyright 2006, 2007, 2008, 2009, 2010 Fluendo S.A.
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* Authors: Jan Schmidt <jan@fluendo.com>
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* Kapil Agrawal <kapil@fluendo.com>
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* Julien Moutte <julien@fluendo.com>
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*
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* Copyright (C) 2011 Jan Schmidt <thaytan@noraisin.net>
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*
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* This library is licensed under 3 different licenses and you
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* can choose to use it under the terms of any one of them. The
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* three licenses are the MPL 1.1, the LGPL and the MIT license.
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*
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* MPL:
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/.
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* LGPL:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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* MIT:
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*
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* Unless otherwise indicated, Source Code is licensed under MIT license.
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* See further explanation attached in License Statement (distributed in the file
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* LICENSE).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* SPDX-License-Identifier: MPL-1.1 OR MIT OR LGPL-2.0-or-later
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*/
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/**
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* SECTION: element-mpegtsmux
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* @title: MPEG Transport Stream muxer
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*
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* mpegtsmux muxes different streams into an MPEG Transport stream
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*
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* SI sections can be specified through a custom event:
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*
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* {{ tests/examples/mpegts/ts-section-writer.c }}
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstmpegtsmux.h"
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#include <string.h>
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#define MPEGTSMUX_DEFAULT_M2TS FALSE
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#define M2TS_PACKET_LENGTH 192
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enum
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{
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PROP_0,
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PROP_M2TS_MODE,
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};
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static GstStaticPadTemplate gst_mpeg_ts_mux_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink_%d",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS ("video/mpeg, "
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"parsed = (boolean) TRUE, "
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"mpegversion = (int) { 1, 2, 4 }, "
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"systemstream = (boolean) false; "
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"video/x-dirac;"
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"image/x-jpc, alignment = (string) frame;"
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"video/x-h264,stream-format=(string)byte-stream,"
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"alignment=(string){au, nal}; "
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"video/x-h265,stream-format=(string)byte-stream,"
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"alignment=(string){au, nal}; "
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"audio/mpeg, "
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"parsed = (boolean) TRUE, "
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"mpegversion = (int) 1;"
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"audio/mpeg, "
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"framed = (boolean) TRUE, "
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"mpegversion = (int) {2, 4}, stream-format = (string) { adts, raw };"
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"audio/x-lpcm, "
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"width = (int) { 16, 20, 24 }, "
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"rate = (int) { 48000, 96000 }, "
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"channels = (int) [ 1, 8 ], "
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"dynamic_range = (int) [ 0, 255 ], "
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"emphasis = (boolean) { FALSE, TRUE }, "
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"mute = (boolean) { FALSE, TRUE }; "
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"audio/x-ac3, framed = (boolean) TRUE;"
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"audio/x-dts, framed = (boolean) TRUE;"
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"audio/x-opus, "
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"channels = (int) [1, 255];"
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"subpicture/x-dvb; application/x-teletext; meta/x-klv, parsed=true;"
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"image/x-jpc, alignment = (string) frame, profile = (int)[0, 49151];"));
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static GstStaticPadTemplate gst_mpeg_ts_mux_src_factory =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/mpegts, "
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"systemstream = (boolean) true, " "packetsize = (int) { 188, 192} ")
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);
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GST_DEBUG_CATEGORY (gst_mpeg_ts_mux_debug);
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#define GST_CAT_DEFAULT gst_mpeg_ts_mux_debug
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#define parent_class gst_mpeg_ts_mux_parent_class
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G_DEFINE_TYPE (GstMpegTsMux, gst_mpeg_ts_mux, GST_TYPE_BASE_TS_MUX);
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GST_ELEMENT_REGISTER_DEFINE (mpegtsmux, "mpegtsmux", GST_RANK_PRIMARY,
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gst_mpeg_ts_mux_get_type ());
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/* Internals */
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static gboolean
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new_packet_m2ts (GstMpegTsMux * mux, GstBuffer * buf, gint64 new_pcr)
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{
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GstBuffer *out_buf;
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int chunk_bytes;
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GstMapInfo map;
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GST_LOG_OBJECT (mux, "Have buffer %p with new_pcr=%" G_GINT64_FORMAT,
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buf, new_pcr);
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chunk_bytes = gst_adapter_available (mux->adapter);
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if (G_LIKELY (buf)) {
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if (new_pcr < 0) {
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/* If there is no pcr in current ts packet then just add the packet
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to the adapter for later output when we see a PCR */
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GST_LOG_OBJECT (mux, "Accumulating non-PCR packet");
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gst_adapter_push (mux->adapter, buf);
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goto exit;
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}
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/* no first interpolation point yet, then this is the one,
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* otherwise it is the second interpolation point */
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if (mux->previous_pcr < 0 && chunk_bytes) {
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mux->previous_pcr = new_pcr;
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mux->previous_offset = chunk_bytes;
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GST_LOG_OBJECT (mux, "Accumulating non-PCR packet");
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gst_adapter_push (mux->adapter, buf);
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goto exit;
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}
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} else {
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g_assert (new_pcr == -1);
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}
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/* interpolate if needed, and 2 points available */
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if (chunk_bytes && (new_pcr != mux->previous_pcr)) {
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gint64 offset = 0;
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GST_LOG_OBJECT (mux, "Processing pending packets; "
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"previous pcr %" G_GINT64_FORMAT ", previous offset %d, "
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"current pcr %" G_GINT64_FORMAT ", current offset %d",
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mux->previous_pcr, (gint) mux->previous_offset,
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new_pcr, (gint) chunk_bytes);
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g_assert (chunk_bytes > mux->previous_offset);
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/* if draining, use previous rate */
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if (G_LIKELY (new_pcr > 0)) {
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mux->pcr_rate_num = new_pcr - mux->previous_pcr;
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mux->pcr_rate_den = chunk_bytes - mux->previous_offset;
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}
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while (offset < chunk_bytes) {
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guint64 cur_pcr, ts;
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/* Loop, pulling packets of the adapter, updating their 4 byte
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* timestamp header and pushing */
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/* interpolate PCR */
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if (G_LIKELY (offset >= mux->previous_offset))
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cur_pcr = mux->previous_pcr +
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gst_util_uint64_scale (offset - mux->previous_offset,
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mux->pcr_rate_num, mux->pcr_rate_den);
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else
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cur_pcr = mux->previous_pcr -
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gst_util_uint64_scale (mux->previous_offset - offset,
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mux->pcr_rate_num, mux->pcr_rate_den);
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/* FIXME: what about DTS here? */
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ts = gst_adapter_prev_pts (mux->adapter, NULL);
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out_buf = gst_adapter_take_buffer (mux->adapter, M2TS_PACKET_LENGTH);
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g_assert (out_buf);
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offset += M2TS_PACKET_LENGTH;
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GST_BUFFER_PTS (out_buf) = ts;
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gst_buffer_map (out_buf, &map, GST_MAP_WRITE);
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/* The header is the bottom 30 bits of the PCR, apparently not
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* encoded into base + ext as in the packets themselves */
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GST_WRITE_UINT32_BE (map.data, cur_pcr & 0x3FFFFFFF);
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gst_buffer_unmap (out_buf, &map);
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GST_LOG_OBJECT (mux, "Outputting a packet of length %d PCR %"
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G_GUINT64_FORMAT, M2TS_PACKET_LENGTH, cur_pcr);
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((GstBaseTsMuxClass *)
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parent_class)->output_packet (GST_BASE_TS_MUX (mux), out_buf, -1);
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}
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}
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if (G_UNLIKELY (!buf))
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goto exit;
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gst_buffer_map (buf, &map, GST_MAP_WRITE);
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/* Finally, output the passed in packet */
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/* Only write the bottom 30 bits of the PCR */
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GST_WRITE_UINT32_BE (map.data, new_pcr & 0x3FFFFFFF);
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gst_buffer_unmap (buf, &map);
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GST_LOG_OBJECT (mux, "Outputting a packet of length %d PCR %"
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G_GUINT64_FORMAT, M2TS_PACKET_LENGTH, new_pcr);
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((GstBaseTsMuxClass *) parent_class)->output_packet (GST_BASE_TS_MUX (mux),
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buf, -1);
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if (new_pcr != mux->previous_pcr) {
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mux->previous_pcr = new_pcr;
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mux->previous_offset = -M2TS_PACKET_LENGTH;
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}
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exit:
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return TRUE;
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}
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/* GstBaseTsMux implementation */
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static void
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gst_mpeg_ts_mux_allocate_packet (GstBaseTsMux * mux, GstBuffer ** buffer)
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{
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((GstBaseTsMuxClass *) parent_class)->allocate_packet (mux, buffer);
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gst_buffer_set_size (*buffer, GST_BASE_TS_MUX_NORMAL_PACKET_LENGTH);
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}
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static gboolean
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gst_mpeg_ts_mux_output_packet (GstBaseTsMux * base_tsmux, GstBuffer * buffer,
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gint64 new_pcr)
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{
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GstMpegTsMux *mux = GST_MPEG_TS_MUX (base_tsmux);
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GstMapInfo map;
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if (!mux->m2ts_mode)
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return ((GstBaseTsMuxClass *) parent_class)->output_packet (base_tsmux,
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buffer, new_pcr);
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gst_buffer_set_size (buffer, M2TS_PACKET_LENGTH);
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gst_buffer_map (buffer, &map, GST_MAP_READWRITE);
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/* there should be a better way to do this */
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memmove (map.data + 4, map.data, map.size - 4);
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gst_buffer_unmap (buffer, &map);
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return new_packet_m2ts (mux, buffer, new_pcr);
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}
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static void
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gst_mpeg_ts_mux_reset (GstBaseTsMux * base_tsmux)
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{
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GstMpegTsMux *mux = GST_MPEG_TS_MUX (base_tsmux);
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if (mux->adapter)
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gst_adapter_clear (mux->adapter);
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mux->previous_pcr = -1;
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mux->previous_offset = 0;
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mux->pcr_rate_num = mux->pcr_rate_den = 1;
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}
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static gboolean
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gst_mpeg_ts_mux_drain (GstBaseTsMux * mux)
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{
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return new_packet_m2ts (GST_MPEG_TS_MUX (mux), NULL, -1);
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}
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/* GObject implementation */
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static void
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gst_mpeg_ts_mux_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstMpegTsMux *mux = GST_MPEG_TS_MUX (object);
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switch (prop_id) {
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case PROP_M2TS_MODE:
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/* set in case if the output stream need to be of 192 bytes */
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mux->m2ts_mode = g_value_get_boolean (value);
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gst_base_ts_mux_set_packet_size (GST_BASE_TS_MUX (mux),
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mux->m2ts_mode ? M2TS_PACKET_LENGTH :
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GST_BASE_TS_MUX_NORMAL_PACKET_LENGTH);
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gst_base_ts_mux_set_automatic_alignment (GST_BASE_TS_MUX (mux),
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mux->m2ts_mode ? 32 : 0);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_mpeg_ts_mux_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstMpegTsMux *mux = GST_MPEG_TS_MUX (object);
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switch (prop_id) {
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case PROP_M2TS_MODE:
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g_value_set_boolean (value, mux->m2ts_mode);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_mpeg_ts_mux_dispose (GObject * object)
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{
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GstMpegTsMux *mux = GST_MPEG_TS_MUX (object);
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if (mux->adapter) {
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g_object_unref (mux->adapter);
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mux->adapter = NULL;
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}
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GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
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}
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static void
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gst_mpeg_ts_mux_class_init (GstMpegTsMuxClass * klass)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstBaseTsMuxClass *base_tsmux_class = GST_BASE_TS_MUX_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (gst_mpeg_ts_mux_debug, "mpegtsmux", 0,
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"MPEG Transport Stream muxer");
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gobject_class->set_property =
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GST_DEBUG_FUNCPTR (gst_mpeg_ts_mux_set_property);
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gobject_class->get_property =
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GST_DEBUG_FUNCPTR (gst_mpeg_ts_mux_get_property);
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_mpeg_ts_mux_dispose);
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base_tsmux_class->allocate_packet =
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GST_DEBUG_FUNCPTR (gst_mpeg_ts_mux_allocate_packet);
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base_tsmux_class->output_packet =
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GST_DEBUG_FUNCPTR (gst_mpeg_ts_mux_output_packet);
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base_tsmux_class->reset = GST_DEBUG_FUNCPTR (gst_mpeg_ts_mux_reset);
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base_tsmux_class->drain = GST_DEBUG_FUNCPTR (gst_mpeg_ts_mux_drain);
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gst_element_class_set_static_metadata (gstelement_class,
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"MPEG Transport Stream Muxer", "Codec/Muxer",
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"Multiplexes media streams into an MPEG Transport Stream",
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"Fluendo <contact@fluendo.com>");
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gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
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&gst_mpeg_ts_mux_sink_factory, GST_TYPE_BASE_TS_MUX_PAD);
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gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
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&gst_mpeg_ts_mux_src_factory, GST_TYPE_AGGREGATOR_PAD);
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g_object_class_install_property (gobject_class, PROP_M2TS_MODE,
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g_param_spec_boolean ("m2ts-mode", "M2TS(192 bytes) Mode",
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"Set to TRUE to output Blu-Ray disc format with 192 byte packets. "
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"FALSE for standard TS format with 188 byte packets.",
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MPEGTSMUX_DEFAULT_M2TS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_mpeg_ts_mux_init (GstMpegTsMux * mux)
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{
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mux->m2ts_mode = MPEGTSMUX_DEFAULT_M2TS;
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mux->adapter = gst_adapter_new ();
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}
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