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/*
* 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;
}
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