author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 22 Jan 2010 09:59:59 +0200 | |
changeset 2 | 5505e8908944 |
parent 0 | 0e761a78d257 |
child 7 | 567bb019e3e3 |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> |
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* 2000 Wim Taymans <wtay@chello.be> |
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* 2002 Andy Wingo <wingo@pobox.com> |
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* |
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* gstparse.c: get a pipeline from a text pipeline description |
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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., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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|
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/** |
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* SECTION:gstparse |
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* @short_description: Get a pipeline from a text pipeline description |
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* |
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* These function allow to create a pipeline based on the syntax used in the |
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* gst-launch utillity. |
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*/ |
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#include "gst_private.h" |
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#include <string.h> |
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#include "gstparse.h" |
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#include "gsterror.h" |
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#include "gstinfo.h" |
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extern GstElement *_gst_parse_launch (const gchar *, GError **); |
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/** |
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* gst_parse_error_quark: |
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* |
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* Get the error quark used by the parsing subsystem. |
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* |
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* Returns: the quark of the parse errors. |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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GQuark |
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gst_parse_error_quark (void) |
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{ |
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static GQuark quark = 0; |
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if (!quark) |
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quark = g_quark_from_static_string ("gst_parse_error"); |
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return quark; |
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} |
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#ifndef GST_DISABLE_PARSE |
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static gchar * |
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_gst_parse_escape (const gchar * str) |
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{ |
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GString *gstr = NULL; |
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gchar *newstr = NULL; |
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g_return_val_if_fail (str != NULL, NULL); |
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gstr = g_string_sized_new (strlen (str)); |
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while (*str) { |
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if (*str == ' ') |
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g_string_append_c (gstr, '\\'); |
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g_string_append_c (gstr, *str); |
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str++; |
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} |
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newstr = gstr->str; |
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g_string_free (gstr, FALSE); |
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return newstr; |
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} |
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#endif /* !GST_DISABLE_PARSE */ |
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/** |
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* gst_parse_launchv: |
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* @argv: null-terminated array of arguments |
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* @error: pointer to a #GError |
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* |
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* Create a new element based on command line syntax. |
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* @error will contain an error message if an erroneuos pipeline is specified. |
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* An error does not mean that the pipeline could not be constructed. |
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* |
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* Returns: a new element on success and %NULL on failure. |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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GstElement * |
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gst_parse_launchv (const gchar ** argv, GError ** error) |
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{ |
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106 |
#ifndef GST_DISABLE_PARSE |
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GstElement *element; |
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GString *str; |
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const gchar **argvp, *arg; |
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gchar *tmp; |
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111 |
|
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g_return_val_if_fail (argv != NULL, NULL); |
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113 |
|
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/* let's give it a nice size. */ |
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str = g_string_sized_new (1024); |
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116 |
|
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argvp = argv; |
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while (*argvp) { |
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arg = *argvp; |
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tmp = _gst_parse_escape (arg); |
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g_string_append (str, tmp); |
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g_free (tmp); |
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g_string_append_c (str, ' '); |
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argvp++; |
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} |
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126 |
|
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element = gst_parse_launch (str->str, error); |
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128 |
|
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g_string_free (str, TRUE); |
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130 |
|
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return element; |
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132 |
#else |
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gchar *msg; |
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134 |
|
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GST_WARNING ("Disabled API called: gst_parse_launchv()"); |
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136 |
|
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msg = gst_error_get_message (GST_CORE_ERROR, GST_CORE_ERROR_DISABLED); |
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g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_DISABLED, "%s", msg); |
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g_free (msg); |
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140 |
|
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return NULL; |
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#endif |
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} |
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144 |
|
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145 |
/** |
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* gst_parse_launch: |
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* @pipeline_description: the command line describing the pipeline |
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* @error: the error message in case of an erroneous pipeline. |
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* |
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* Create a new pipeline based on command line syntax. |
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* Please note that you might get a return value that is not %NULL even though |
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* the @error is set. In this case there was a recoverable parsing error and you |
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* can try to play the pipeline. |
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* |
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* Returns: a new element on success, %NULL on failure. If more than one toplevel |
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* element is specified by the @pipeline_description, all elements are put into |
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* a #GstPipeline, which than is returned. |
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*/ |
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#ifdef __SYMBIAN32__ |
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160 |
EXPORT_C |
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#endif |
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162 |
|
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GstElement * |
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gst_parse_launch (const gchar * pipeline_description, GError ** error) |
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165 |
{ |
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#ifndef GST_DISABLE_PARSE |
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GstElement *element; |
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168 |
|
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g_return_val_if_fail (pipeline_description != NULL, NULL); |
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170 |
|
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GST_CAT_INFO (GST_CAT_PIPELINE, "parsing pipeline description %s", |
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pipeline_description); |
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173 |
|
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element = _gst_parse_launch (pipeline_description, error); |
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175 |
|
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return element; |
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#else |
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gchar *msg; |
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179 |
|
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GST_WARNING ("Disabled API called: gst_parse_launch()"); |
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181 |
|
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msg = gst_error_get_message (GST_CORE_ERROR, GST_CORE_ERROR_DISABLED); |
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g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_DISABLED, "%s", msg); |
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g_free (msg); |
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185 |
|
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return NULL; |
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#endif |
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188 |
} |