mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-04 05:35:53 +00:00
295 lines
10 KiB
C
295 lines
10 KiB
C
/*
|
|
* Copyright 2006, 2007, 2008, 2009, 2010 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., 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 "mpegtsmux_h264.h"
|
|
#include <string.h>
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (mpegtsmux_debug);
|
|
#define GST_CAT_DEFAULT mpegtsmux_debug
|
|
|
|
#define SPS_PPS_PERIOD GST_SECOND
|
|
|
|
typedef struct PrivDataH264 PrivDataH264;
|
|
|
|
struct PrivDataH264
|
|
{
|
|
GstBuffer *last_codec_data;
|
|
GstClockTime last_resync_ts;
|
|
GstBuffer *cached_es;
|
|
guint8 nal_length_size;
|
|
};
|
|
|
|
void
|
|
mpegtsmux_free_h264 (gpointer prepare_data)
|
|
{
|
|
PrivDataH264 *h264_data = (PrivDataH264 *) prepare_data;
|
|
if (h264_data->cached_es) {
|
|
gst_buffer_unref (h264_data->cached_es);
|
|
h264_data->cached_es = NULL;
|
|
}
|
|
g_free (prepare_data);
|
|
}
|
|
|
|
static inline gboolean
|
|
mpegtsmux_process_codec_data_h264 (MpegTsPadData * data, MpegTsMux * mux)
|
|
{
|
|
PrivDataH264 *h264_data;
|
|
gboolean ret = FALSE;
|
|
|
|
/* Initialize our private data structure for caching */
|
|
if (G_UNLIKELY (!data->prepare_data)) {
|
|
data->prepare_data = g_new0 (PrivDataH264, 1);
|
|
h264_data = (PrivDataH264 *) data->prepare_data;
|
|
h264_data->last_resync_ts = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
h264_data = (PrivDataH264 *) data->prepare_data;
|
|
|
|
/* Detect a codec data change */
|
|
if (h264_data->last_codec_data != data->codec_data) {
|
|
if (h264_data->cached_es) {
|
|
gst_buffer_unref (h264_data->cached_es);
|
|
h264_data->cached_es = NULL;
|
|
}
|
|
ret = TRUE;
|
|
}
|
|
|
|
/* Generate the SPS/PPS ES header that will be prepended regularly */
|
|
if (G_UNLIKELY (!h264_data->cached_es)) {
|
|
gint offset = 4, i = 0, nb_sps = 0, nb_pps = 0;
|
|
gsize out_offset = 0;
|
|
guint8 startcode[4] = { 0x00, 0x00, 0x00, 0x01 };
|
|
h264_data->last_codec_data = data->codec_data;
|
|
h264_data->cached_es =
|
|
gst_buffer_new_and_alloc (GST_BUFFER_SIZE (data->codec_data) * 10);
|
|
|
|
/* Get NAL length size */
|
|
h264_data->nal_length_size =
|
|
(GST_READ_UINT8 (GST_BUFFER_DATA (data->codec_data) + offset) & 0x03) +
|
|
1;
|
|
GST_LOG_OBJECT (mux, "NAL length will be coded on %u bytes",
|
|
h264_data->nal_length_size);
|
|
offset++;
|
|
|
|
/* How many SPS */
|
|
nb_sps =
|
|
GST_READ_UINT8 (GST_BUFFER_DATA (data->codec_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 (GST_BUFFER_DATA (data->codec_data) + offset);
|
|
|
|
GST_LOG_OBJECT (mux, "Sequence Parameter Set is %d bytes", sps_size);
|
|
|
|
/* Jump over SPS size */
|
|
offset += 2;
|
|
|
|
/* Fake a start code */
|
|
memcpy (GST_BUFFER_DATA (h264_data->cached_es) + out_offset,
|
|
startcode, 4);
|
|
out_offset += 4;
|
|
/* Now push the SPS */
|
|
memcpy (GST_BUFFER_DATA (h264_data->cached_es) + out_offset,
|
|
GST_BUFFER_DATA (data->codec_data) + offset, sps_size);
|
|
|
|
out_offset += sps_size;
|
|
offset += sps_size;
|
|
}
|
|
|
|
/* How many PPS */
|
|
nb_pps = GST_READ_UINT8 (GST_BUFFER_DATA (data->codec_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 (GST_BUFFER_DATA (data->codec_data) + offset);
|
|
|
|
GST_LOG_OBJECT (mux, "Picture Parameter Set is %d bytes", pps_size);
|
|
|
|
/* Jump over PPS size */
|
|
offset += 2;
|
|
|
|
/* Fake a start code */
|
|
memcpy (GST_BUFFER_DATA (h264_data->cached_es) + out_offset,
|
|
startcode, 4);
|
|
out_offset += 4;
|
|
/* Now push the PPS */
|
|
memcpy (GST_BUFFER_DATA (h264_data->cached_es) + out_offset,
|
|
GST_BUFFER_DATA (data->codec_data) + offset, pps_size);
|
|
|
|
out_offset += pps_size;
|
|
offset += pps_size;
|
|
}
|
|
GST_BUFFER_SIZE (h264_data->cached_es) = out_offset;
|
|
GST_DEBUG_OBJECT (mux, "generated a %" G_GSIZE_FORMAT
|
|
" bytes SPS/PPS header", out_offset);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
GstBuffer *
|
|
mpegtsmux_prepare_h264 (GstBuffer * buf, MpegTsPadData * data, MpegTsMux * mux)
|
|
{
|
|
guint8 startcode[4] = { 0x00, 0x00, 0x00, 0x01 };
|
|
gsize out_offset = 0, in_offset = 0;
|
|
GstBuffer *out_buf;
|
|
gboolean changed;
|
|
PrivDataH264 *h264_data;
|
|
GstClockTimeDiff diff = GST_CLOCK_TIME_NONE;
|
|
|
|
GST_DEBUG_OBJECT (mux, "Preparing H264 buffer for output");
|
|
|
|
changed = mpegtsmux_process_codec_data_h264 (data, mux);
|
|
h264_data = (PrivDataH264 *) data->prepare_data;
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (h264_data->last_resync_ts) &&
|
|
GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buf))) {
|
|
diff = GST_CLOCK_DIFF (h264_data->last_resync_ts,
|
|
GST_BUFFER_TIMESTAMP (buf));
|
|
}
|
|
|
|
if (changed || (GST_CLOCK_TIME_IS_VALID (diff) && diff > SPS_PPS_PERIOD)) {
|
|
out_buf = gst_buffer_new_and_alloc (GST_BUFFER_SIZE (buf) * 2 +
|
|
GST_BUFFER_SIZE (h264_data->cached_es));
|
|
h264_data->last_resync_ts = GST_BUFFER_TIMESTAMP (buf);
|
|
memcpy (GST_BUFFER_DATA (out_buf), GST_BUFFER_DATA (h264_data->cached_es),
|
|
GST_BUFFER_SIZE (h264_data->cached_es));
|
|
out_offset = GST_BUFFER_SIZE (h264_data->cached_es);
|
|
GST_DEBUG_OBJECT (mux, "prepending SPS/PPS information to that packet");
|
|
} else {
|
|
out_buf = gst_buffer_new_and_alloc (GST_BUFFER_SIZE (buf) * 2);
|
|
}
|
|
|
|
/* We want the same metadata */
|
|
gst_buffer_copy_metadata (out_buf, buf, GST_BUFFER_COPY_ALL);
|
|
|
|
while (in_offset < GST_BUFFER_SIZE (buf) &&
|
|
out_offset < GST_BUFFER_SIZE (out_buf) - 4) {
|
|
guint32 nal_size = 0;
|
|
|
|
switch (h264_data->nal_length_size) {
|
|
case 1:
|
|
nal_size = GST_READ_UINT8 (GST_BUFFER_DATA (buf) + in_offset);
|
|
break;
|
|
case 2:
|
|
nal_size = GST_READ_UINT16_BE (GST_BUFFER_DATA (buf) + in_offset);
|
|
break;
|
|
case 4:
|
|
nal_size = GST_READ_UINT32_BE (GST_BUFFER_DATA (buf) + in_offset);
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (mux, "unsupported NAL length size %u",
|
|
h264_data->nal_length_size);
|
|
}
|
|
in_offset += h264_data->nal_length_size;
|
|
|
|
/* Generate an Elementary stream buffer by inserting a startcode */
|
|
memcpy (GST_BUFFER_DATA (out_buf) + out_offset, startcode, 4);
|
|
out_offset += 4;
|
|
memcpy (GST_BUFFER_DATA (out_buf) + out_offset,
|
|
GST_BUFFER_DATA (buf) + in_offset,
|
|
MIN (nal_size, GST_BUFFER_SIZE (out_buf) - out_offset));
|
|
in_offset += nal_size;
|
|
out_offset += nal_size;
|
|
}
|
|
|
|
if (out_offset > GST_BUFFER_SIZE (out_buf)) {
|
|
GST_WARNING_OBJECT (mux, "Calculated buffer size %" G_GSIZE_FORMAT
|
|
" is greater than max expected size %u, "
|
|
"using max expected size (Input might not be in "
|
|
"avc format", out_offset, GST_BUFFER_SIZE (out_buf));
|
|
out_offset = GST_BUFFER_SIZE (out_buf);
|
|
}
|
|
GST_BUFFER_SIZE (out_buf) = out_offset;
|
|
|
|
return out_buf;
|
|
}
|