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/*
* gstannodex.c - GStreamer annodex plugin
* Copyright (C) 2005 Alessandro Decina
*
* Authors:
* Alessandro Decina <alessandro@nnva.org>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <gst/tag/tag.h>
#include "gstcmmlparser.h"
#include "gstcmmlenc.h"
#include "gstcmmldec.h"
GstClockTime
gst_annodex_granule_to_time (gint64 granulepos, gint64 granulerate_n,
gint64 granulerate_d, guint8 granuleshift)
{
gint64 keyindex, keyoffset;
gint64 granulerate;
GstClockTime res;
g_return_val_if_fail (granuleshift <= 64, GST_CLOCK_TIME_NONE);
if (granulepos == -1)
return GST_CLOCK_TIME_NONE;
if (granulepos == 0 || granulerate_n == 0 || granulerate_d == 0)
return 0;
if (granuleshift != 0 && granuleshift != 64) {
keyindex = granulepos >> granuleshift;
keyoffset = granulepos - (keyindex << granuleshift);
granulepos = keyindex + keyoffset;
}
/* GST_SECOND / (granulerate_n / granulerate_d) */
granulerate = gst_util_uint64_scale (GST_SECOND,
granulerate_d, granulerate_n);
/* granulepos * granulerate */
res = gst_util_uint64_scale (granulepos, granulerate, 1);
return res;
}
GValueArray *
gst_annodex_parse_headers (const gchar * headers)
{
GValueArray *array;
GValue val = { 0 };
gchar *header_name = NULL;
gchar *header_value = NULL;
gchar *line, *column, *space, *tmp;
gchar **lines;
gint i = 0;
array = g_value_array_new (0);
g_value_init (&val, G_TYPE_STRING);
lines = g_strsplit (headers, "\r\n", 0);
line = lines[i];
while (line != NULL && *line != '\0') {
if (line[0] == '\t' || line[0] == ' ') {
/* WSP: continuation line */
if (header_value == NULL)
/* continuation line without a previous value */
goto fail;
tmp = g_strjoin (" ", header_value, g_strstrip (line), NULL);
g_free (header_value);
header_value = tmp;
} else {
if (header_name) {
g_value_take_string (&val, header_name);
g_value_array_append (array, &val);
g_value_take_string (&val, header_value);
g_value_array_append (array, &val);
}
/* search the column starting from line[1] as an header name can't be
* empty */
column = g_strstr_len (line + 1, strlen (line) - 1, ":");
if (column == NULL)
/* bad syntax */
goto fail;
if (*(space = column + 1) != ' ')
/* bad syntax */
goto fail;
header_name = g_strndup (line, column - line);
header_value = g_strdup (space + 1);
}
line = lines[++i];
}
if (header_name) {
g_value_take_string (&val, header_name);
g_value_array_append (array, &val);
g_value_take_string (&val, header_value);
g_value_array_append (array, &val);
}
g_value_unset (&val);
g_strfreev (lines);
return array;
fail:
GST_WARNING ("could not parse annodex headers");
g_free (header_name);
g_free (header_value);
g_strfreev (lines);
g_value_array_free (array);
g_value_unset (&val);
return NULL;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
gst_tag_register (GST_TAG_CMML_STREAM, GST_TAG_FLAG_META,
GST_TYPE_CMML_TAG_STREAM, "cmml-stream", "annodex CMML stream tag", NULL);
gst_tag_register (GST_TAG_CMML_HEAD, GST_TAG_FLAG_META,
GST_TYPE_CMML_TAG_HEAD, "cmml-head", "annodex CMML head tag", NULL);
gst_tag_register (GST_TAG_CMML_CLIP, GST_TAG_FLAG_META,
GST_TYPE_CMML_TAG_CLIP, "cmml-clip", "annodex CMML clip tag", NULL);
gst_cmml_parser_init ();
if (!gst_cmml_enc_plugin_init (plugin))
return FALSE;
if (!gst_cmml_dec_plugin_init (plugin))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"annodex",
"annodex stream manipulation (info about annodex: http://www.annodex.net)",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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