From 555486f865d6933da9cf983fc161e56474468ec4 Mon Sep 17 00:00:00 2001 From: Zaheer Abbas Merali Date: Tue, 2 Sep 2008 12:04:32 +0000 Subject: Add Fluendo MPEG PS and TS demuxers to gst-plugins-bad. This is now dual licensed MPL and LGPL. Original commit message from CVS: * configure.ac: * gst/mpegdemux/Makefile.am: * gst/mpegdemux/flumpegdemux.c: * gst/mpegdemux/flutspatinfo.c: * gst/mpegdemux/flutspatinfo.h: * gst/mpegdemux/flutspmtinfo.c: * gst/mpegdemux/flutspmtinfo.h: * gst/mpegdemux/flutspmtstreaminfo.c: * gst/mpegdemux/flutspmtstreaminfo.h: * gst/mpegdemux/gstmpegdefs.h: * gst/mpegdemux/gstmpegdemux.c: * gst/mpegdemux/gstmpegdemux.h: * gst/mpegdemux/gstmpegdesc.c: * gst/mpegdemux/gstmpegdesc.h: * gst/mpegdemux/gstmpegtsdemux.c: * gst/mpegdemux/gstmpegtsdemux.h: * gst/mpegdemux/gstpesfilter.c: * gst/mpegdemux/gstpesfilter.h: * gst/mpegdemux/gstsectionfilter.c: * gst/mpegdemux/gstsectionfilter.h: Add Fluendo MPEG PS and TS demuxers to gst-plugins-bad. This is now dual licensed MPL and LGPL. --- gst/mpegdemux/gstmpegdesc.c | 178 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 178 insertions(+) create mode 100644 gst/mpegdemux/gstmpegdesc.c (limited to 'gst/mpegdemux/gstmpegdesc.c') diff --git a/gst/mpegdemux/gstmpegdesc.c b/gst/mpegdemux/gstmpegdesc.c new file mode 100644 index 00000000..1bab07ba --- /dev/null +++ b/gst/mpegdemux/gstmpegdesc.c @@ -0,0 +1,178 @@ + /* + * This library is licensed under 2 different licenses and you + * can choose to use it under the terms of either one of them. The + * two licenses are the MPL 1.1 and the LGPL. + * + * 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. + * + * The Original Code is Fluendo MPEG Demuxer plugin. + * + * The Initial Developer of the Original Code is Fluendo, S.L. + * Portions created by Fluendo, S.L. are Copyright (C) 2005 + * Fluendo, S.L. All Rights Reserved. + * + * Contributor(s): Wim Taymans + */ + +#include + +#include + +#include "gstmpegdesc.h" + +void +gst_mpeg_descriptor_free (GstMPEGDescriptor * desc) +{ + g_return_if_fail (desc != NULL); + + g_free (desc); +} + +static guint +gst_mpeg_descriptor_parse_1 (guint8 * data, guint size) +{ + guint8 tag; + guint8 length; + + /* need at least 2 bytes for tag and length */ + if (size < 2) + return 0; + + tag = *data++; + length = *data++; + size -= 2; + + GST_DEBUG ("tag: 0x%02x, length: %d", tag, length); + + if (length > size) + return 0; + + return length + 2;; +} + +GstMPEGDescriptor * +gst_mpeg_descriptor_parse (guint8 * data, guint size) +{ + guint8 *current; + guint consumed, total, n_desc; + GstMPEGDescriptor *result; + + g_return_val_if_fail (data != NULL, NULL); + + current = data; + total = 0; + n_desc = 0; + + do { + consumed = gst_mpeg_descriptor_parse_1 (current, size); + + if (consumed > 0) { + current += consumed; + total += consumed; + size -= consumed; + n_desc++; + } + } + while (consumed > 0); + + GST_DEBUG ("parsed %d descriptors", n_desc); + + if (total == 0) + return NULL; + + result = g_malloc (sizeof (GstMPEGDescriptor) + total); + result->n_desc = n_desc; + result->data_length = total; + result->data = ((guint8 *) result) + sizeof (GstMPEGDescriptor); + + memcpy (result->data, data, total); + + return result; +} + +guint +gst_mpeg_descriptor_n_desc (GstMPEGDescriptor * desc) +{ + g_return_val_if_fail (desc != NULL, 0); + + return desc->n_desc; +} + +guint8 * +gst_mpeg_descriptor_find (GstMPEGDescriptor * desc, gint tag) +{ + gint length; + guint8 *current; + guint size; + + g_return_val_if_fail (desc != NULL, NULL); + + current = desc->data; + length = desc->data_length; + + while (length > 0) { + if (DESC_TAG (current) == tag) + return current; + + size = DESC_LENGTH (current) + 2; + + current += size; + length -= size; + } + return NULL; +} + +guint8 * +gst_mpeg_descriptor_nth (GstMPEGDescriptor * desc, guint i) +{ + gint length; + guint8 *current; + guint size; + + g_return_val_if_fail (desc != NULL, NULL); + + if (i > desc->n_desc) + return NULL; + + current = desc->data; + length = desc->data_length; + + while (length > 0) { + if (i == 0) + return current; + + size = DESC_LENGTH (current) + 2; + + current += size; + length -= size; + i--; + } + return NULL; +} -- cgit v1.2.1