mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-23 18:21:04 +00:00
207 lines
7 KiB
C
207 lines
7 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>
|
|
*
|
|
* Copyright 2008 Lin YANG <oxcsnicho@gmail.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 "mpegpsmux_h264.h"
|
|
#include <gst/base/gstbytewriter.h>
|
|
#include <string.h>
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (mpegpsmux_debug);
|
|
#define GST_CAT_DEFAULT mpegpsmux_debug
|
|
|
|
GstBuffer *
|
|
mpegpsmux_prepare_h264 (GstBuffer * buf, MpegPsPadData * data, MpegPsMux * mux)
|
|
{
|
|
GstByteWriter bw;
|
|
GstMapInfo codec_data, map;
|
|
guint8 nal_length_size = 0;
|
|
GstBuffer *out_buf;
|
|
guint8 nb_sps = 0, nb_pps = 0;
|
|
gint offset = 4, i = 0;
|
|
gsize in_offset;
|
|
|
|
GST_DEBUG_OBJECT (mux, "Preparing H264 buffer for output");
|
|
|
|
/* FIXME: are we prepending SPS/PPS in front of every single buffer?
|
|
* (should only be in front of keyframes really, if at all) */
|
|
/* FIXME: create a byte-stream version of SPS/PPS once in set_caps */
|
|
if (!gst_buffer_map (data->codec_data, &codec_data, GST_MAP_READ))
|
|
return NULL;
|
|
|
|
gst_byte_writer_init_with_size (&bw, gst_buffer_get_size (buf) * 2, FALSE);
|
|
|
|
/* Get NAL length size */
|
|
nal_length_size = (codec_data.data[offset] & 0x03) + 1;
|
|
GST_LOG_OBJECT (mux, "NAL length will be coded on %u bytes", nal_length_size);
|
|
offset++;
|
|
|
|
/* Generate SPS */
|
|
nb_sps = codec_data.data[offset] & 0x1f;
|
|
GST_DEBUG_OBJECT (mux, "we have %d Sequence Parameter Set", nb_sps);
|
|
offset++;
|
|
|
|
/* For each SPS */
|
|
for (i = 0; i < nb_sps; i++) {
|
|
guint16 sps_size = GST_READ_UINT16_BE (codec_data.data + offset);
|
|
|
|
GST_LOG_OBJECT (mux, "Sequence Parameter Set is %d bytes", sps_size);
|
|
|
|
/* Jump over SPS size */
|
|
offset += 2;
|
|
|
|
/* Fake a start code */
|
|
gst_byte_writer_put_uint32_be (&bw, 0x00000001);
|
|
|
|
/* Now push the SPS */
|
|
gst_byte_writer_put_data (&bw, codec_data.data + offset, sps_size);
|
|
|
|
offset += sps_size;
|
|
}
|
|
|
|
nb_pps = codec_data.data[offset];
|
|
GST_LOG_OBJECT (mux, "we have %d Picture Parameter Set", nb_sps);
|
|
offset++;
|
|
|
|
/* For each PPS */
|
|
for (i = 0; i < nb_pps; i++) {
|
|
gint pps_size = GST_READ_UINT16_BE (codec_data.data + offset);
|
|
|
|
GST_LOG_OBJECT (mux, "Picture Parameter Set is %d bytes", pps_size);
|
|
|
|
/* Jump over PPS size */
|
|
offset += 2;
|
|
|
|
/* Fake a start code */
|
|
gst_byte_writer_put_uint32_be (&bw, 0x00000001);
|
|
|
|
/* Now push the PPS */
|
|
gst_byte_writer_put_data (&bw, codec_data.data + offset, pps_size);
|
|
|
|
offset += pps_size;
|
|
}
|
|
|
|
gst_buffer_unmap (data->codec_data, &codec_data);
|
|
|
|
if (!gst_buffer_map (buf, &map, GST_MAP_READ))
|
|
return NULL;
|
|
|
|
/* now process NALs and change them to byte-stream format */
|
|
in_offset = 0;
|
|
while (in_offset < map.size) {
|
|
guint32 nal_size = 0;
|
|
|
|
switch (nal_length_size) {
|
|
case 1:
|
|
nal_size = GST_READ_UINT8 (map.data + in_offset);
|
|
break;
|
|
case 2:
|
|
nal_size = GST_READ_UINT16_BE (map.data + in_offset);
|
|
break;
|
|
case 4:
|
|
nal_size = GST_READ_UINT32_BE (map.data + in_offset);
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (mux, "unsupported NAL length size %u",
|
|
nal_length_size);
|
|
break;
|
|
}
|
|
in_offset += nal_length_size;
|
|
|
|
/* Generate an Elementary stream buffer by inserting a startcode */
|
|
gst_byte_writer_put_uint32_be (&bw, 0x00000001);
|
|
gst_byte_writer_put_data (&bw, map.data + in_offset,
|
|
MIN (nal_size, map.size - in_offset));
|
|
in_offset += nal_size;
|
|
}
|
|
|
|
out_buf = gst_byte_writer_reset_and_get_buffer (&bw);
|
|
|
|
/* We want the same metadata */
|
|
gst_buffer_copy_into (out_buf, buf, GST_BUFFER_COPY_METADATA, 0, 0);
|
|
|
|
return out_buf;
|
|
}
|