gstreamer/gst/mpegtsmux/gstbasetsmuxopus.c
2019-07-04 19:42:48 +09:00

149 lines
5.2 KiB
C

/*
* Copyright 2006, 2007, 2008 Fluendo S.A.
* Authors: Jan Schmidt <jan@fluendo.com>
* Kapil Agrawal <kapil@fluendo.com>
* Julien Moutte <julien@fluendo.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 "gstbasetsmuxopus.h"
#include <string.h>
#include <gst/audio/audio.h>
#define GST_CAT_DEFAULT gst_base_ts_mux_debug
GstBuffer *
gst_base_ts_mux_prepare_opus (GstBuffer * buf, GstBaseTsMuxPad * pad,
GstBaseTsMux * mux)
{
gssize insize = gst_buffer_get_size (buf);
gsize outsize;
GstBuffer *outbuf;
GstMapInfo map;
guint n;
GstAudioClippingMeta *cmeta = gst_buffer_get_audio_clipping_meta (buf);
g_assert (!cmeta || cmeta->format == GST_FORMAT_DEFAULT);
outsize = 2 + insize / 255 + 1;
if (cmeta && cmeta->start)
outsize += 2;
if (cmeta && cmeta->end)
outsize += 2;
outbuf = gst_buffer_new_and_alloc (outsize);
gst_buffer_copy_into (outbuf, buf,
GST_BUFFER_COPY_METADATA | GST_BUFFER_COPY_TIMESTAMPS, 0, 0);
gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
map.data[0] = 0x7f;
map.data[1] = 0xe0;
if (cmeta && cmeta->start)
map.data[1] |= 0x10;
if (cmeta && cmeta->end)
map.data[1] |= 0x08;
n = 2;
do {
g_assert (n < outsize);
/* FIXME: this should be using insize for writing here but ffmpeg and the
* only available sample stream from obe.tv are not including the control
* header size in au_size
*/
map.data[n] = MIN (insize, 255);
insize -= 255;
n++;
} while (insize >= 0);
if (cmeta && cmeta->start) {
GST_WRITE_UINT16_BE (&map.data[n], cmeta->start);
n += 2;
}
if (cmeta && cmeta->end)
GST_WRITE_UINT16_BE (&map.data[n], cmeta->end);
gst_buffer_unmap (outbuf, &map);
outbuf = gst_buffer_append (outbuf, gst_buffer_ref (buf));
return outbuf;
}