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122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
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* Microsoft Smooth-Streaming fragment parsing library
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*
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* gstmssfragmentparser.h
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*
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* Copyright (C) 2016 Igalia S.L
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* Copyright (C) 2016 Metrological
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* Author: Philippe Normand <philn@igalia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library (COPYING); if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "gstmssfragmentparser.h"
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#include <gst/base/gstbytereader.h>
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#include <string.h>
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GST_DEBUG_CATEGORY_EXTERN (mssdemux_debug);
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#define GST_CAT_DEFAULT mssdemux_debug
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void
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gst_mss_fragment_parser_init (GstMssFragmentParser * parser)
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{
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parser->status = GST_MSS_FRAGMENT_HEADER_PARSER_INIT;
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}
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void
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gst_mss_fragment_parser_clear (GstMssFragmentParser * parser)
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{
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if (parser->moof)
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gst_isoff_moof_box_free (parser->moof);
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parser->moof = NULL;
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parser->current_fourcc = 0;
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}
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gboolean
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gst_mss_fragment_parser_add_buffer (GstMssFragmentParser * parser,
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GstBuffer * buffer)
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{
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GstByteReader reader;
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GstMapInfo info;
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guint64 size;
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guint32 fourcc;
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guint header_size;
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gboolean error = FALSE;
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if (!gst_buffer_map (buffer, &info, GST_MAP_READ)) {
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return FALSE;
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}
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gst_byte_reader_init (&reader, info.data, info.size);
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GST_TRACE ("Total buffer size: %u", gst_byte_reader_get_size (&reader));
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do {
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parser->current_fourcc = 0;
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if (!gst_isoff_parse_box_header (&reader, &fourcc, NULL, &header_size,
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&size)) {
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break;
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}
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parser->current_fourcc = fourcc;
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GST_LOG ("box %" GST_FOURCC_FORMAT " size %" G_GUINT64_FORMAT,
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GST_FOURCC_ARGS (fourcc), size);
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parser->current_fourcc = fourcc;
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if (parser->current_fourcc == GST_ISOFF_FOURCC_MOOF) {
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GstByteReader sub_reader;
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g_assert (parser->moof == NULL);
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gst_byte_reader_get_sub_reader (&reader, &sub_reader, size - header_size);
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parser->moof = gst_isoff_moof_box_parse (&sub_reader);
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if (parser->moof == NULL) {
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GST_ERROR ("Failed to parse moof");
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error = TRUE;
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}
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} else if (parser->current_fourcc == GST_ISOFF_FOURCC_MDAT) {
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goto beach;
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} else {
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gst_byte_reader_skip (&reader, size - header_size);
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}
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} while (gst_byte_reader_get_remaining (&reader) > 0);
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beach:
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/* Do sanity check */
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if (parser->current_fourcc != GST_ISOFF_FOURCC_MDAT || !parser->moof ||
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parser->moof->traf->len == 0)
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error = TRUE;
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if (!error) {
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GstTrafBox *traf = &g_array_index (parser->moof->traf, GstTrafBox, 0);
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if (!traf->tfxd) {
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GST_ERROR ("no tfxd box");
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error = TRUE;
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} else if (!traf->tfrf) {
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GST_ERROR ("no tfrf box");
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error = TRUE;
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}
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}
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if (!error)
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parser->status = GST_MSS_FRAGMENT_HEADER_PARSER_FINISHED;
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GST_LOG ("Fragment parsing successful: %s", error ? "no" : "yes");
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gst_buffer_unmap (buffer, &info);
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return !error;
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}
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