mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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0ddfc5020f
Reduce a tiny bit of the bulk of qtdemux.c by moving some agnostic helper functions out. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/634>
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David A. Schleef <ds@schleef.org>
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* Copyright (C) <2006> Wim Taymans <wim@fluendo.com>
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* Copyright (C) <2007> Julien Moutte <julien@fluendo.com>
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* Copyright (C) <2009> Tim-Philipp Müller <tim centricular net>
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* Copyright (C) <2009> STEricsson <benjamin.gaignard@stericsson.com>
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* Copyright (C) <2013> Sreerenj Balachandran <sreerenj.balachandran@intel.com>
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* Copyright (C) <2013> Intel Corporation
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* Copyright (C) <2014> Centricular Ltd
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* Copyright (C) <2015> YouView TV Ltd.
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* Copyright (C) <2016> British Broadcasting Corporation
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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 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; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "qtdemux_tree.h"
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#include "qtdemux_types.h"
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#include "fourcc.h"
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GNode *
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qtdemux_tree_get_child_by_type (GNode * node, guint32 fourcc)
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{
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GNode *child;
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guint8 *buffer;
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guint32 child_fourcc;
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for (child = g_node_first_child (node); child;
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child = g_node_next_sibling (child)) {
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buffer = (guint8 *) child->data;
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child_fourcc = QT_FOURCC (buffer + 4);
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if (G_UNLIKELY (child_fourcc == fourcc)) {
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return child;
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}
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}
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return NULL;
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}
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GNode *
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qtdemux_tree_get_child_by_type_full (GNode * node, guint32 fourcc,
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GstByteReader * parser)
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{
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GNode *child;
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guint8 *buffer;
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guint32 child_fourcc, child_len;
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for (child = g_node_first_child (node); child;
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child = g_node_next_sibling (child)) {
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buffer = (guint8 *) child->data;
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child_len = QT_UINT32 (buffer);
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child_fourcc = QT_FOURCC (buffer + 4);
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if (G_UNLIKELY (child_fourcc == fourcc)) {
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if (G_UNLIKELY (child_len < (4 + 4)))
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return NULL;
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/* FIXME: must verify if atom length < parent atom length */
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gst_byte_reader_init (parser, buffer + (4 + 4), child_len - (4 + 4));
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return child;
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}
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}
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return NULL;
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}
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GNode *
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qtdemux_tree_get_child_by_index (GNode * node, guint index)
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{
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return g_node_nth_child (node, index);
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}
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GNode *
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qtdemux_tree_get_sibling_by_type_full (GNode * node, guint32 fourcc,
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GstByteReader * parser)
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{
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GNode *child;
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guint8 *buffer;
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guint32 child_fourcc, child_len;
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for (child = g_node_next_sibling (node); child;
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child = g_node_next_sibling (child)) {
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buffer = (guint8 *) child->data;
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child_fourcc = QT_FOURCC (buffer + 4);
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if (child_fourcc == fourcc) {
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if (parser) {
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child_len = QT_UINT32 (buffer);
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if (G_UNLIKELY (child_len < (4 + 4)))
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return NULL;
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/* FIXME: must verify if atom length < parent atom length */
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gst_byte_reader_init (parser, buffer + (4 + 4), child_len - (4 + 4));
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}
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return child;
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}
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}
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return NULL;
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}
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GNode *
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qtdemux_tree_get_sibling_by_type (GNode * node, guint32 fourcc)
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{
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return qtdemux_tree_get_sibling_by_type_full (node, fourcc, NULL);
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}
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