mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 03:01:03 +00:00
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
|
|
* Microsoft Smooth-Streaming fragment parsing library
|
|
*
|
|
* gstmssfragmentparser.h
|
|
*
|
|
* Copyright (C) 2016 Igalia S.L
|
|
* Copyright (C) 2016 Metrological
|
|
* Author: Philippe Normand <philn@igalia.com>
|
|
*
|
|
* 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 2.1 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 (COPYING); if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "gstmssfragmentparser.h"
|
|
#include <gst/base/gstbytereader.h>
|
|
#include <string.h>
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (mssdemux_debug);
|
|
#define GST_CAT_DEFAULT mssdemux_debug
|
|
|
|
void
|
|
gst_mss_fragment_parser_init (GstMssFragmentParser * parser)
|
|
{
|
|
parser->status = GST_MSS_FRAGMENT_HEADER_PARSER_INIT;
|
|
}
|
|
|
|
void
|
|
gst_mss_fragment_parser_clear (GstMssFragmentParser * parser)
|
|
{
|
|
if (parser->moof)
|
|
gst_isoff_moof_box_free (parser->moof);
|
|
parser->moof = NULL;
|
|
parser->current_fourcc = 0;
|
|
}
|
|
|
|
gboolean
|
|
gst_mss_fragment_parser_add_buffer (GstMssFragmentParser * parser,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstByteReader reader;
|
|
GstMapInfo info;
|
|
guint64 size;
|
|
guint32 fourcc;
|
|
guint header_size;
|
|
gboolean error = FALSE;
|
|
|
|
if (!gst_buffer_map (buffer, &info, GST_MAP_READ)) {
|
|
return FALSE;
|
|
}
|
|
|
|
gst_byte_reader_init (&reader, info.data, info.size);
|
|
GST_TRACE ("Total buffer size: %u", gst_byte_reader_get_size (&reader));
|
|
|
|
do {
|
|
parser->current_fourcc = 0;
|
|
|
|
if (!gst_isoff_parse_box_header (&reader, &fourcc, NULL, &header_size,
|
|
&size)) {
|
|
break;
|
|
}
|
|
|
|
parser->current_fourcc = fourcc;
|
|
|
|
GST_LOG ("box %" GST_FOURCC_FORMAT " size %" G_GUINT64_FORMAT,
|
|
GST_FOURCC_ARGS (fourcc), size);
|
|
|
|
parser->current_fourcc = fourcc;
|
|
|
|
if (parser->current_fourcc == GST_ISOFF_FOURCC_MOOF) {
|
|
GstByteReader sub_reader;
|
|
|
|
g_assert (parser->moof == NULL);
|
|
gst_byte_reader_get_sub_reader (&reader, &sub_reader, size - header_size);
|
|
parser->moof = gst_isoff_moof_box_parse (&sub_reader);
|
|
if (parser->moof == NULL) {
|
|
GST_ERROR ("Failed to parse moof");
|
|
error = TRUE;
|
|
}
|
|
} else if (parser->current_fourcc == GST_ISOFF_FOURCC_MDAT) {
|
|
goto beach;
|
|
} else {
|
|
gst_byte_reader_skip (&reader, size - header_size);
|
|
}
|
|
} while (gst_byte_reader_get_remaining (&reader) > 0);
|
|
|
|
beach:
|
|
|
|
/* Do sanity check */
|
|
if (parser->current_fourcc != GST_ISOFF_FOURCC_MDAT || !parser->moof ||
|
|
parser->moof->traf->len == 0)
|
|
error = TRUE;
|
|
|
|
if (!error) {
|
|
GstTrafBox *traf = &g_array_index (parser->moof->traf, GstTrafBox, 0);
|
|
if (!traf->tfxd) {
|
|
GST_ERROR ("no tfxd box");
|
|
error = TRUE;
|
|
} else if (!traf->tfrf) {
|
|
GST_ERROR ("no tfrf box");
|
|
error = TRUE;
|
|
}
|
|
}
|
|
|
|
if (!error)
|
|
parser->status = GST_MSS_FRAGMENT_HEADER_PARSER_FINISHED;
|
|
|
|
GST_LOG ("Fragment parsing successful: %s", error ? "no" : "yes");
|
|
gst_buffer_unmap (buffer, &info);
|
|
return !error;
|
|
}
|