mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 21:28:45 +00:00
Don't truncate the last character of a string if it isn't necessary. https://bugzilla.gnome.org/show_bug.cgi?id=688625
1167 lines
33 KiB
Text
1167 lines
33 KiB
Text
%{
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#include "../gst_private.h"
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#include <glib-object.h>
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#include <glib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "../gst-i18n-lib.h"
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#include "../gstconfig.h"
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#include "../gstparse.h"
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#include "../gstinfo.h"
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#include "../gsterror.h"
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#include "../gststructure.h"
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#include "../gsturi.h"
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#include "../gstutils.h"
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#include "../gstvalue.h"
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#include "../gstchildproxy.h"
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#include "types.h"
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/* All error messages in this file are user-visible and need to be translated.
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* Don't start the message with a capital, and don't end them with a period,
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* as they will be presented inside a sentence/error.
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*/
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#define YYERROR_VERBOSE 1
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#define YYENABLE_NLS 0
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#ifndef YYLTYPE_IS_TRIVIAL
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#define YYLTYPE_IS_TRIVIAL 0
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#endif
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/*******************************************************************************************
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*** Tracing memory leaks
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*******************************************************************************************/
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#ifdef __GST_PARSE_TRACE
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static guint __strings;
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static guint __links;
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static guint __chains;
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gchar *
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__gst_parse_strdup (gchar *org)
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{
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gchar *ret;
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__strings++;
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ret = g_strdup (org);
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/* g_print ("ALLOCATED STR (%3u): %p %s\n", __strings, ret, ret); */
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return ret;
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}
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void
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__gst_parse_strfree (gchar *str)
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{
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if (str) {
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/* g_print ("FREEING STR (%3u): %p %s\n", __strings - 1, str, str); */
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g_free (str);
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g_return_if_fail (__strings > 0);
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__strings--;
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}
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}
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link_t *__gst_parse_link_new (void)
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{
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link_t *ret;
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__links++;
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ret = g_slice_new0 (link_t);
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/* g_print ("ALLOCATED LINK (%3u): %p\n", __links, ret); */
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return ret;
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}
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void
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__gst_parse_link_free (link_t *data)
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{
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if (data) {
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/* g_print ("FREEING LINK (%3u): %p\n", __links - 1, data); */
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g_slice_free (link_t, data);
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g_return_if_fail (__links > 0);
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__links--;
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}
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}
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chain_t *
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__gst_parse_chain_new (void)
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{
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chain_t *ret;
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__chains++;
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ret = g_slice_new0 (chain_t);
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/* g_print ("@%p: ALLOCATED CHAIN (%3u):\n", ret, __chains); */
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return ret;
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}
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void
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__gst_parse_chain_free (chain_t *data)
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{
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/* g_print ("@%p: FREEING CHAIN (%3u):\n", data, __chains - 1); */
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g_slice_free (chain_t, data);
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g_return_if_fail (__chains > 0);
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__chains--;
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}
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#endif /* __GST_PARSE_TRACE */
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/*******************************************************************************************
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*** define SET_ERROR macro/function
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*******************************************************************************************/
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#ifdef G_HAVE_ISO_VARARGS
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# define SET_ERROR(error, type, ...) \
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G_STMT_START { \
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GST_CAT_ERROR (GST_CAT_PIPELINE, __VA_ARGS__); \
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if ((error) && !*(error)) { \
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g_set_error ((error), GST_PARSE_ERROR, (type), __VA_ARGS__); \
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} \
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} G_STMT_END
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#elif defined(G_HAVE_GNUC_VARARGS)
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# define SET_ERROR(error, type, args...) \
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G_STMT_START { \
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GST_CAT_ERROR (GST_CAT_PIPELINE, args ); \
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if ((error) && !*(error)) { \
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g_set_error ((error), GST_PARSE_ERROR, (type), args ); \
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} \
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} G_STMT_END
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#else
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static inline void
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SET_ERROR (GError **error, gint type, const char *format, ...)
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{
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if (error) {
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if (*error) {
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g_warning ("error while parsing");
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} else {
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va_list varargs;
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char *string;
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va_start (varargs, format);
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string = g_strdup_vprintf (format, varargs);
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va_end (varargs);
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g_set_error (error, GST_PARSE_ERROR, type, string);
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g_free (string);
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}
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}
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}
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#endif /* G_HAVE_ISO_VARARGS */
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/*** define YYPRINTF macro/function if we're debugging */
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/* bison 1.35 calls this macro with side effects, we need to make sure the
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side effects work - crappy bison */
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#ifndef GST_DISABLE_GST_DEBUG
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# define YYDEBUG 1
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# ifdef G_HAVE_ISO_VARARGS
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/* # define YYFPRINTF(a, ...) GST_CAT_DEBUG (GST_CAT_PIPELINE, __VA_ARGS__) */
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# define YYFPRINTF(a, ...) \
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G_STMT_START { \
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GST_CAT_LOG (GST_CAT_PIPELINE, __VA_ARGS__); \
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} G_STMT_END
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# elif defined(G_HAVE_GNUC_VARARGS)
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# define YYFPRINTF(a, args...) \
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G_STMT_START { \
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GST_CAT_LOG (GST_CAT_PIPELINE, args); \
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} G_STMT_END
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# else
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static inline void
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YYPRINTF(const char *format, ...)
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{
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va_list varargs;
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gchar *temp;
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va_start (varargs, format);
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temp = g_strdup_vprintf (format, varargs);
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GST_CAT_LOG (GST_CAT_PIPELINE, "%s", temp);
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g_free (temp);
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va_end (varargs);
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}
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# endif /* G_HAVE_ISO_VARARGS */
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#endif /* GST_DISABLE_GST_DEBUG */
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/*
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* include headers generated by bison & flex, after defining (or not defining) YYDEBUG
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*/
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#include "grammar.tab.h"
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#include "parse_lex.h"
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/*******************************************************************************************
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*** report missing elements/bins/..
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*******************************************************************************************/
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static void add_missing_element(graph_t *graph,gchar *name){
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if ((graph)->ctx){
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(graph)->ctx->missing_elements = g_list_append ((graph)->ctx->missing_elements, g_strdup (name));
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}
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}
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/*******************************************************************************************
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*** helpers for pipeline-setup
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*******************************************************************************************/
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#define TRY_SETUP_LINK(l) G_STMT_START { \
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if( (!(l)->src.element) && (!(l)->src.name) ){ \
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SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link has no source [sink=%s@%p]"), \
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(l)->sink.name ? (l)->sink.name : _(""), \
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(l)->sink.element); \
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gst_parse_free_link (l); \
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}else if( (!(l)->sink.element) && (!(l)->sink.name) ){ \
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SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link has no sink [source=%s@%p]"), \
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(l)->src.name ? (l)->src.name :_(""), \
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(l)->src.element); \
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gst_parse_free_link (l); \
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}else{ \
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graph->links = g_slist_append (graph->links, l ); \
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} \
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} G_STMT_END
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typedef struct {
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gchar *src_pad;
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gchar *sink_pad;
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GstElement *sink;
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GstCaps *caps;
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gulong signal_id;
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} DelayedLink;
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typedef struct {
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gchar *name;
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gchar *value_str;
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gulong signal_id;
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} DelayedSet;
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static int gst_resolve_reference(reference_t *rr, GstElement *pipeline){
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GstBin *bin;
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if(rr->element) return 0; /* already resolved! */
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if(!rr->name) return -2; /* no chance! */
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if (GST_IS_BIN (pipeline)){
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bin = GST_BIN (pipeline);
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rr->element = gst_bin_get_by_name_recurse_up (bin, rr->name);
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} else {
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rr->element = strcmp (GST_ELEMENT_NAME (pipeline), rr->name) == 0 ?
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gst_object_ref(pipeline) : NULL;
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}
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if(rr->element) return 0; /* resolved */
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else return -1; /* not found */
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}
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static void gst_parse_free_delayed_set (DelayedSet *set)
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{
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g_free(set->name);
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g_free(set->value_str);
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g_slice_free(DelayedSet, set);
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}
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static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
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const gchar * name, gpointer data);
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static void gst_parse_add_delayed_set (GstElement *element, gchar *name, gchar *value_str)
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{
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DelayedSet *data = g_slice_new0 (DelayedSet);
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GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, element, "delaying property set %s to %s",
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name, value_str);
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data->name = g_strdup(name);
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data->value_str = g_strdup(value_str);
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data->signal_id = g_signal_connect_data(element, "child-added",
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G_CALLBACK (gst_parse_new_child), data, (GClosureNotify)
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gst_parse_free_delayed_set, (GConnectFlags) 0);
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/* FIXME: we would need to listen on all intermediate bins too */
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if (GST_IS_BIN (element)) {
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gchar **names, **current;
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GstElement *parent, *child;
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current = names = g_strsplit (name, "::", -1);
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parent = gst_bin_get_by_name (GST_BIN_CAST (element), current[0]);
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current++;
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while (parent && current[0]) {
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child = gst_bin_get_by_name (GST_BIN (parent), current[0]);
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if (!child && current[1]) {
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char *sub_name = g_strjoinv ("::", ¤t[0]);
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gst_parse_add_delayed_set(parent, sub_name, value_str);
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g_free (sub_name);
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}
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gst_object_unref (parent);
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parent = child;
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current++;
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}
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if (parent)
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gst_object_unref (parent);
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g_strfreev (names);
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}
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}
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static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
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const gchar * name, gpointer data)
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{
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DelayedSet *set = (DelayedSet *) data;
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GParamSpec *pspec;
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GValue v = { 0, };
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GObject *target = NULL;
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GType value_type;
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GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, child_proxy, "new child %s, checking property %s",
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name, set->name);
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if (gst_child_proxy_lookup (child_proxy, set->name, &target, &pspec)) {
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gboolean got_value = FALSE;
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value_type = pspec->value_type;
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GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, child_proxy, "parsing delayed property %s as a %s from %s",
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pspec->name, g_type_name (value_type), set->value_str);
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g_value_init (&v, value_type);
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if (gst_value_deserialize (&v, set->value_str))
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got_value = TRUE;
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else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
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GstElement *bin;
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bin = gst_parse_bin_from_description_full (set->value_str, TRUE, NULL,
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GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS, NULL);
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if (bin) {
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g_value_set_object (&v, bin);
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got_value = TRUE;
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}
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}
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g_signal_handler_disconnect (child_proxy, set->signal_id);
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if (!got_value)
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goto error;
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g_object_set_property (target, pspec->name, &v);
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} else {
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const gchar *obj_name = GST_OBJECT_NAME(object);
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gint len = strlen (obj_name);
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/* do a delayed set */
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if ((strlen (set->name) > (len + 2)) && !strncmp (set->name, obj_name, len) && !strncmp (&set->name[len], "::", 2)) {
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gst_parse_add_delayed_set (GST_ELEMENT(child_proxy), set->name, set->value_str);
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}
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}
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out:
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if (G_IS_VALUE (&v))
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g_value_unset (&v);
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if (target)
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g_object_unref (target);
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return;
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error:
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GST_CAT_ERROR (GST_CAT_PIPELINE, "could not set property \"%s\" in %"
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GST_PTR_FORMAT, pspec->name, target);
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goto out;
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}
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static void gst_parse_element_set (gchar *value, GstElement *element, graph_t *graph)
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{
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GParamSpec *pspec = NULL;
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gchar *pos = value;
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GValue v = { 0, };
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GObject *target = NULL;
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GType value_type;
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/* do nothing if assignment is for missing element */
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if (element == NULL)
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goto out;
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/* parse the string, so the property name is null-terminated and pos points
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to the beginning of the value */
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while (!g_ascii_isspace (*pos) && (*pos != '=')) pos++;
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if (*pos == '=') {
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*pos = '\0';
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} else {
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*pos = '\0';
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pos++;
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while (g_ascii_isspace (*pos)) pos++;
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}
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pos++;
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while (g_ascii_isspace (*pos)) pos++;
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/* truncate a string if it is delimited with double quotes */
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if (*pos == '"' && pos[strlen (pos) - 1] == '"') {
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pos++;
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pos[strlen (pos) - 1] = '\0';
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}
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gst_parse_unescape (pos);
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if (GST_IS_CHILD_PROXY (element)) {
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if (!gst_child_proxy_lookup (GST_CHILD_PROXY (element), value, &target, &pspec)) {
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/* do a delayed set */
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gst_parse_add_delayed_set (element, value, pos);
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}
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} else {
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pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (element), value);
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if (pspec != NULL) {
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target = g_object_ref (element);
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GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, target, "found %s property", value);
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} else {
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SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_PROPERTY, \
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_("no property \"%s\" in element \"%s\""), value, \
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GST_ELEMENT_NAME (element));
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}
|
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}
|
|
|
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if (pspec != NULL && target != NULL) {
|
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gboolean got_value = FALSE;
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|
|
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value_type = pspec->value_type;
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|
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GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, element, "parsing property %s as a %s",
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pspec->name, g_type_name (value_type));
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|
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g_value_init (&v, value_type);
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if (gst_value_deserialize (&v, pos))
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got_value = TRUE;
|
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else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
|
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GstElement *bin;
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|
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bin = gst_parse_bin_from_description_full (pos, TRUE, NULL,
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GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS, NULL);
|
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if (bin) {
|
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g_value_set_object (&v, bin);
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got_value = TRUE;
|
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}
|
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}
|
|
if (!got_value)
|
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goto error;
|
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g_object_set_property (target, pspec->name, &v);
|
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}
|
|
|
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out:
|
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gst_parse_strfree (value);
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if (G_IS_VALUE (&v))
|
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g_value_unset (&v);
|
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if (target)
|
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g_object_unref (target);
|
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return;
|
|
|
|
error:
|
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SET_ERROR (graph->error, GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY,
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_("could not set property \"%s\" in element \"%s\" to \"%s\""),
|
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value, GST_ELEMENT_NAME (element), pos);
|
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goto out;
|
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}
|
|
|
|
static void gst_parse_free_reference (reference_t *rr)
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|
{
|
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if(rr->element) gst_object_unref(rr->element);
|
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gst_parse_strfree (rr->name);
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g_slist_foreach (rr->pads, (GFunc) gst_parse_strfree, NULL);
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g_slist_free (rr->pads);
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}
|
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|
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static void gst_parse_free_link (link_t *link)
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{
|
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gst_parse_free_reference (&(link->src));
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gst_parse_free_reference (&(link->sink));
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if (link->caps) gst_caps_unref (link->caps);
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gst_parse_link_free (link);
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}
|
|
|
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static void gst_parse_free_chain (chain_t *ch)
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{
|
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GSList *walk;
|
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gst_parse_free_reference (&(ch->first));
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gst_parse_free_reference (&(ch->last));
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for(walk=ch->elements;walk;walk=walk->next)
|
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gst_object_unref (walk->data);
|
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g_slist_free (ch->elements);
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gst_parse_chain_free (ch);
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}
|
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|
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static void gst_parse_free_delayed_link (DelayedLink *link)
|
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{
|
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g_free (link->src_pad);
|
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g_free (link->sink_pad);
|
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if (link->caps) gst_caps_unref (link->caps);
|
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g_slice_free (DelayedLink, link);
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}
|
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|
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static void gst_parse_found_pad (GstElement *src, GstPad *pad, gpointer data)
|
|
{
|
|
DelayedLink *link = data;
|
|
|
|
GST_CAT_INFO (GST_CAT_PIPELINE, "trying delayed linking %s:%s to %s:%s",
|
|
GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
|
|
GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
|
|
|
|
if (gst_element_link_pads_filtered (src, link->src_pad, link->sink,
|
|
link->sink_pad, link->caps)) {
|
|
/* do this here, we don't want to get any problems later on when
|
|
* unlocking states */
|
|
GST_CAT_DEBUG (GST_CAT_PIPELINE, "delayed linking %s:%s to %s:%s worked",
|
|
GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
|
|
GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
|
|
g_signal_handler_disconnect (src, link->signal_id);
|
|
}
|
|
}
|
|
|
|
/* both padnames and the caps may be NULL */
|
|
static gboolean
|
|
gst_parse_perform_delayed_link (GstElement *src, const gchar *src_pad,
|
|
GstElement *sink, const gchar *sink_pad,
|
|
GstCaps *caps)
|
|
{
|
|
GList *templs = gst_element_class_get_pad_template_list (
|
|
GST_ELEMENT_GET_CLASS (src));
|
|
|
|
for (; templs; templs = templs->next) {
|
|
GstPadTemplate *templ = (GstPadTemplate *) templs->data;
|
|
if ((GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) &&
|
|
(GST_PAD_TEMPLATE_PRESENCE(templ) == GST_PAD_SOMETIMES))
|
|
{
|
|
DelayedLink *data = g_slice_new (DelayedLink);
|
|
|
|
/* TODO: maybe we should check if src_pad matches this template's names */
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PIPELINE, "trying delayed link %s:%s to %s:%s",
|
|
GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (src_pad),
|
|
GST_STR_NULL (GST_ELEMENT_NAME (sink)), GST_STR_NULL (sink_pad));
|
|
|
|
data->src_pad = g_strdup (src_pad);
|
|
data->sink = sink;
|
|
data->sink_pad = g_strdup (sink_pad);
|
|
if (caps) {
|
|
data->caps = gst_caps_copy (caps);
|
|
} else {
|
|
data->caps = NULL;
|
|
}
|
|
data->signal_id = g_signal_connect_data (src, "pad-added",
|
|
G_CALLBACK (gst_parse_found_pad), data,
|
|
(GClosureNotify) gst_parse_free_delayed_link, (GConnectFlags) 0);
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* performs a link and frees the struct. src and sink elements must be given
|
|
* return values 0 - link performed
|
|
* 1 - link delayed
|
|
* <0 - error
|
|
*/
|
|
static gint
|
|
gst_parse_perform_link (link_t *link, graph_t *graph)
|
|
{
|
|
GstElement *src = link->src.element;
|
|
GstElement *sink = link->sink.element;
|
|
GSList *srcs = link->src.pads;
|
|
GSList *sinks = link->sink.pads;
|
|
g_assert (GST_IS_ELEMENT (src));
|
|
g_assert (GST_IS_ELEMENT (sink));
|
|
|
|
GST_CAT_INFO (GST_CAT_PIPELINE,
|
|
"linking %s:%s to %s:%s (%u/%u) with caps \"%" GST_PTR_FORMAT "\"",
|
|
GST_ELEMENT_NAME (src), link->src.name ? link->src.name : "(any)",
|
|
GST_ELEMENT_NAME (sink), link->sink.name ? link->sink.name : "(any)",
|
|
g_slist_length (srcs), g_slist_length (sinks), link->caps);
|
|
|
|
if (!srcs || !sinks) {
|
|
if (gst_element_link_pads_filtered (src,
|
|
srcs ? (const gchar *) srcs->data : NULL, sink,
|
|
sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
|
|
goto success;
|
|
} else {
|
|
if (gst_parse_perform_delayed_link (src,
|
|
srcs ? (const gchar *) srcs->data : NULL,
|
|
sink, sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
|
|
goto success;
|
|
} else {
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
if (g_slist_length (link->src.pads) != g_slist_length (link->sink.pads)) {
|
|
goto error;
|
|
}
|
|
while (srcs && sinks) {
|
|
const gchar *src_pad = (const gchar *) srcs->data;
|
|
const gchar *sink_pad = (const gchar *) sinks->data;
|
|
srcs = g_slist_next (srcs);
|
|
sinks = g_slist_next (sinks);
|
|
if (gst_element_link_pads_filtered (src, src_pad, sink, sink_pad,
|
|
link->caps)) {
|
|
continue;
|
|
} else {
|
|
if (gst_parse_perform_delayed_link (src, src_pad,
|
|
sink, sink_pad,
|
|
link->caps)) {
|
|
continue;
|
|
} else {
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
|
|
success:
|
|
gst_parse_free_link (link);
|
|
return 0;
|
|
|
|
error:
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
|
|
_("could not link %s to %s"), GST_ELEMENT_NAME (src),
|
|
GST_ELEMENT_NAME (sink));
|
|
gst_parse_free_link (link);
|
|
return -1;
|
|
}
|
|
|
|
|
|
static int yyerror (void *scanner, graph_t *graph, const char *s);
|
|
%}
|
|
|
|
%union {
|
|
gchar *ss;
|
|
chain_t *cc;
|
|
link_t *ll;
|
|
reference_t rr;
|
|
GstElement *ee;
|
|
GSList *pp;
|
|
graph_t *gg;
|
|
}
|
|
|
|
/* No grammar ambiguities expected, FAIL otherwise */
|
|
%expect 0
|
|
|
|
%token <ss> PARSE_URL
|
|
%token <ss> IDENTIFIER
|
|
%left <ss> REF PADREF BINREF
|
|
%token <ss> ASSIGNMENT
|
|
%token <ss> LINK
|
|
|
|
%type <ss> binopener
|
|
%type <gg> graph
|
|
%type <cc> chain bin chainlist openchain elementary
|
|
%type <rr> reference
|
|
%type <ll> link
|
|
%type <ee> element
|
|
%type <pp> morepads pads assignments
|
|
|
|
%destructor { gst_parse_strfree ($$); } <ss>
|
|
%destructor { if($$)
|
|
gst_parse_free_chain($$); } <cc>
|
|
%destructor { gst_parse_free_link ($$); } <ll>
|
|
%destructor { gst_parse_free_reference(&($$));} <rr>
|
|
%destructor { gst_object_unref ($$); } <ee>
|
|
%destructor { GSList *walk;
|
|
for(walk=$$;walk;walk=walk->next)
|
|
gst_parse_strfree (walk->data);
|
|
g_slist_free ($$); } <pp>
|
|
|
|
|
|
|
|
%left '(' ')'
|
|
%left ','
|
|
%right '.'
|
|
%left '!' '='
|
|
|
|
%lex-param { void *scanner }
|
|
%parse-param { void *scanner }
|
|
%parse-param { graph_t *graph }
|
|
%pure-parser
|
|
|
|
%start graph
|
|
%%
|
|
|
|
/*************************************************************
|
|
* Grammar explanation:
|
|
* _element_s are specified by an identifier of their type.
|
|
* a name can be give in the optional property-assignments
|
|
* coffeeelement
|
|
* fakesrc name=john
|
|
* identity silence=false name=frodo
|
|
* (cont'd)
|
|
**************************************************************/
|
|
element: IDENTIFIER { $$ = gst_element_factory_make ($1, NULL);
|
|
if ($$ == NULL) {
|
|
add_missing_element(graph, $1);
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, _("no element \"%s\""), $1);
|
|
}
|
|
gst_parse_strfree ($1);
|
|
}
|
|
| element ASSIGNMENT { gst_parse_element_set ($2, $1, graph);
|
|
$$ = $1;
|
|
}
|
|
;
|
|
|
|
/*************************************************************
|
|
* Grammar explanation: (cont'd)
|
|
* a graph has (pure) _element_s, _bin_s and _link_s.
|
|
* since bins are special elements, bins and elements can
|
|
* be generalized as _elementary_.
|
|
* The construction of _bin_s will be discussed later.
|
|
* (cont'd)
|
|
*
|
|
**************************************************************/
|
|
elementary:
|
|
element { $$ = gst_parse_chain_new ();
|
|
/* g_print ("@%p: CHAINing elementary\n", $$); */
|
|
$$->first.element = $1? gst_object_ref($1) : NULL;
|
|
$$->last.element = $1? gst_object_ref($1) : NULL;
|
|
$$->first.name = $$->last.name = NULL;
|
|
$$->first.pads = $$->last.pads = NULL;
|
|
$$->elements = $1 ? g_slist_prepend (NULL, $1) : NULL;
|
|
}
|
|
| bin { $$=$1; }
|
|
;
|
|
|
|
/*************************************************************
|
|
* Grammar explanation: (cont'd)
|
|
* a _chain_ is a list of _elementary_s that have _link_s inbetween
|
|
* which are represented through infix-notation.
|
|
*
|
|
* fakesrc ! sometransformation ! fakesink
|
|
*
|
|
* every _link_ can be augmented with _pads_.
|
|
*
|
|
* coffeesrc .sound ! speakersink
|
|
* multisrc .movie,ads ! .projector,smallscreen multisink
|
|
*
|
|
* and every _link_ can be setup to filter media-types
|
|
* mediasrc ! audio/x-raw, signed=TRUE ! stereosink
|
|
*
|
|
* User HINT:
|
|
* if the lexer does not recognize your media-type it
|
|
* will make it an element name. that results in errors
|
|
* like
|
|
* NO SUCH ELEMENT: no element audio7x-raw
|
|
* '7' vs. '/' in https://en.wikipedia.org/wiki/QWERTZ
|
|
*
|
|
* Parsing HINT:
|
|
* in the parser we need to differ between chains that can
|
|
* be extended by more elementaries (_openchain_) and others
|
|
* that are syntactically closed (handled later in this file).
|
|
* (e.g. fakesrc ! sinkreferencename.padname)
|
|
**************************************************************/
|
|
chain: openchain { $$=$1;
|
|
if($$->last.name){
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_SYNTAX,
|
|
_("unexpected reference \"%s\" - ignoring"), $$->last.name);
|
|
gst_parse_strfree($$->last.name);
|
|
$$->last.name=NULL;
|
|
}
|
|
if($$->last.pads){
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_SYNTAX,
|
|
_("unexpected pad-reference \"%s\" - ignoring"), (gchar*)$$->last.pads->data);
|
|
g_slist_foreach ($$->last.pads, (GFunc) gst_parse_strfree, NULL);
|
|
g_slist_free ($$->last.pads);
|
|
$$->last.pads=NULL;
|
|
}
|
|
}
|
|
;
|
|
|
|
openchain:
|
|
elementary pads { $$=$1;
|
|
$$->last.pads = g_slist_concat ($$->last.pads, $2);
|
|
/* g_print ("@%p@%p: FKI elementary pads\n", $1, $$->last.pads); */
|
|
}
|
|
| openchain link pads elementary pads
|
|
{
|
|
$2->src = $1->last;
|
|
$2->sink = $4->first;
|
|
$2->sink.pads = g_slist_concat ($3, $2->sink.pads);
|
|
TRY_SETUP_LINK($2);
|
|
$4->first = $1->first;
|
|
$4->elements = g_slist_concat ($1->elements, $4->elements);
|
|
gst_parse_chain_free($1);
|
|
$$ = $4;
|
|
$$->last.pads = g_slist_concat ($$->last.pads, $5);
|
|
}
|
|
|
|
;
|
|
|
|
link: LINK { $$ = gst_parse_link_new ();
|
|
$$->src.element = NULL;
|
|
$$->sink.element = NULL;
|
|
$$->src.name = NULL;
|
|
$$->sink.name = NULL;
|
|
$$->src.pads = NULL;
|
|
$$->sink.pads = NULL;
|
|
$$->caps = NULL;
|
|
if ($1) {
|
|
$$->caps = gst_caps_from_string ($1);
|
|
if ($$->caps == NULL)
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("could not parse caps \"%s\""), $1);
|
|
gst_parse_strfree ($1);
|
|
}
|
|
}
|
|
;
|
|
pads: /* NOP */ { $$ = NULL; }
|
|
| PADREF morepads { $$ = $2;
|
|
$$ = g_slist_prepend ($$, $1);
|
|
}
|
|
;
|
|
morepads: /* NOP */ { $$ = NULL; }
|
|
| ',' IDENTIFIER morepads { $$ = g_slist_prepend ($3, $2); }
|
|
;
|
|
|
|
/*************************************************************
|
|
* Grammar explanation: (cont'd)
|
|
* the first and last elements of a _chain_ can be give
|
|
* as URL. This creates special elements that fit the URL.
|
|
*
|
|
* fakesrc ! http://fake-sink.org
|
|
* http://somesource.org ! fakesink
|
|
**************************************************************/
|
|
|
|
chain: openchain link PARSE_URL { GstElement *element =
|
|
gst_element_make_from_uri (GST_URI_SINK, $3, NULL, NULL);
|
|
/* FIXME: get and parse error properly */
|
|
if (!element) {
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
|
|
_("no sink element for URI \"%s\""), $3);
|
|
}
|
|
$$ = $1;
|
|
$2->sink.element = element?gst_object_ref(element):NULL;
|
|
$2->src = $1->last;
|
|
TRY_SETUP_LINK($2);
|
|
$$->last.element = NULL;
|
|
$$->last.name = NULL;
|
|
$$->last.pads = NULL;
|
|
if(element) $$->elements = g_slist_append ($$->elements, element);
|
|
g_free ($3);
|
|
}
|
|
;
|
|
openchain:
|
|
PARSE_URL { GstElement *element =
|
|
gst_element_make_from_uri (GST_URI_SRC, $1, NULL, NULL);
|
|
/* FIXME: get and parse error properly */
|
|
if (!element) {
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
|
|
_("no source element for URI \"%s\""), $1);
|
|
}
|
|
$$ = gst_parse_chain_new ();
|
|
/* g_print ("@%p: CHAINing srcURL\n", $$); */
|
|
$$->first.element = NULL;
|
|
$$->first.name = NULL;
|
|
$$->first.pads = NULL;
|
|
$$->last.element = element ? gst_object_ref(element):NULL;
|
|
$$->last.name = NULL;
|
|
$$->last.pads = NULL;
|
|
$$->elements = element ? g_slist_prepend (NULL, element) : NULL;
|
|
g_free($1);
|
|
}
|
|
;
|
|
|
|
|
|
/*************************************************************
|
|
* Grammar explanation: (cont'd)
|
|
* the first and last elements of a _chain_ can be linked
|
|
* to a named _reference_ (with optional pads).
|
|
*
|
|
* fakesrc ! nameOfSinkElement.
|
|
* fakesrc ! nameOfSinkElement.Padname
|
|
* fakesrc ! nameOfSinkElement.Padname, anotherPad
|
|
* nameOfSource.Padname ! fakesink
|
|
**************************************************************/
|
|
|
|
chain: openchain link reference { $$ = $1;
|
|
$2->sink= $3;
|
|
$2->src = $1->last;
|
|
TRY_SETUP_LINK($2);
|
|
$$->last.element = NULL;
|
|
$$->last.name = NULL;
|
|
$$->last.pads = NULL;
|
|
}
|
|
;
|
|
|
|
|
|
openchain:
|
|
reference { $$ = gst_parse_chain_new ();
|
|
$$->last=$1;
|
|
$$->first.element = NULL;
|
|
$$->first.name = NULL;
|
|
$$->first.pads = NULL;
|
|
$$->elements = NULL;
|
|
}
|
|
;
|
|
reference: REF morepads {
|
|
gchar *padname = $1;
|
|
GSList *pads = $2;
|
|
if (padname) {
|
|
while (*padname != '.') padname++;
|
|
*padname = '\0';
|
|
padname++;
|
|
if (*padname != '\0')
|
|
pads = g_slist_prepend (pads, gst_parse_strdup (padname));
|
|
}
|
|
$$.element=NULL;
|
|
$$.name=$1;
|
|
$$.pads=pads;
|
|
}
|
|
;
|
|
|
|
|
|
/*************************************************************
|
|
* Grammar explanation: (cont'd)
|
|
* a _chainlist_ is just a list of _chain_s.
|
|
*
|
|
* You can specify _link_s with named
|
|
* _reference_ on each side. That
|
|
* works already after the explanations above.
|
|
* someSourceName.Pad ! someSinkName.
|
|
* someSourceName.Pad,anotherPad ! someSinkName.Apad,Bpad
|
|
*
|
|
* If a syntax error occurs, the already finished _chain_s
|
|
* and _links_ are kept intact.
|
|
*************************************************************/
|
|
|
|
chainlist: /* NOP */ { $$ = NULL; }
|
|
| chainlist chain { if ($1){
|
|
gst_parse_free_reference(&($1->last));
|
|
gst_parse_free_reference(&($2->first));
|
|
$2->first = $1->first;
|
|
$2->elements = g_slist_concat ($1->elements, $2->elements);
|
|
gst_parse_chain_free ($1);
|
|
}
|
|
$$ = $2;
|
|
}
|
|
| chainlist error { $$=$1;
|
|
GST_CAT_DEBUG (GST_CAT_PIPELINE,"trying to recover from syntax error");
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_SYNTAX, _("syntax error"));
|
|
}
|
|
;
|
|
|
|
/*************************************************************
|
|
* Grammar explanation: (cont'd)
|
|
* _bins_
|
|
*************************************************************/
|
|
|
|
|
|
assignments: /* NOP */ { $$ = NULL; }
|
|
| ASSIGNMENT assignments { $$ = g_slist_prepend ($2, $1); }
|
|
;
|
|
|
|
binopener: '(' { $$ = gst_parse_strdup(_("bin")); }
|
|
| BINREF { $$ = $1; }
|
|
;
|
|
bin: binopener assignments chainlist ')' {
|
|
chain_t *chain = $3;
|
|
GSList *walk;
|
|
GstBin *bin = (GstBin *) gst_element_factory_make ($1, NULL);
|
|
if (!chain) {
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY_BIN,
|
|
_("specified empty bin \"%s\", not allowed"), $1);
|
|
chain = gst_parse_chain_new ();
|
|
chain->first.element = chain->last.element = NULL;
|
|
chain->first.name = chain->last.name = NULL;
|
|
chain->first.pads = chain->last.pads = NULL;
|
|
chain->elements = NULL;
|
|
}
|
|
if (!bin) {
|
|
add_missing_element(graph, $1);
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
|
|
_("no bin \"%s\", unpacking elements"), $1);
|
|
/* clear property-list */
|
|
g_slist_foreach ($2, (GFunc) gst_parse_strfree, NULL);
|
|
g_slist_free ($2);
|
|
$2 = NULL;
|
|
} else {
|
|
for (walk = chain->elements; walk; walk = walk->next )
|
|
gst_bin_add (bin, GST_ELEMENT (walk->data));
|
|
g_slist_free (chain->elements);
|
|
chain->elements = g_slist_prepend (NULL, bin);
|
|
}
|
|
$$ = chain;
|
|
/* set the properties now
|
|
* HINT: property-list cleared above, if bin==NULL
|
|
*/
|
|
for (walk = $2; walk; walk = walk->next)
|
|
gst_parse_element_set ((gchar *) walk->data,
|
|
GST_ELEMENT (bin), graph);
|
|
g_slist_free ($2);
|
|
gst_parse_strfree ($1);
|
|
}
|
|
;
|
|
|
|
/*************************************************************
|
|
* Grammar explanation: (cont'd)
|
|
* _graph_
|
|
*************************************************************/
|
|
|
|
graph: chainlist { $$ = graph;
|
|
$$->chain = $1;
|
|
if(!$1) {
|
|
SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY, _("empty pipeline not allowed"));
|
|
}
|
|
}
|
|
;
|
|
|
|
%%
|
|
|
|
|
|
static int
|
|
yyerror (void *scanner, graph_t *graph, const char *s)
|
|
{
|
|
/* FIXME: This should go into the GError somehow, but how? */
|
|
GST_WARNING ("Error during parsing: %s", s);
|
|
return -1;
|
|
}
|
|
|
|
|
|
GstElement *
|
|
priv_gst_parse_launch (const gchar *str, GError **error, GstParseContext *ctx,
|
|
GstParseFlags flags)
|
|
{
|
|
graph_t g;
|
|
gchar *dstr;
|
|
GSList *walk;
|
|
GstBin *bin = NULL;
|
|
GstElement *ret;
|
|
yyscan_t scanner;
|
|
|
|
g_return_val_if_fail (str != NULL, NULL);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
|
|
|
g.chain = NULL;
|
|
g.links = NULL;
|
|
g.error = error;
|
|
g.ctx = ctx;
|
|
g.flags = flags;
|
|
|
|
#ifdef __GST_PARSE_TRACE
|
|
GST_CAT_DEBUG (GST_CAT_PIPELINE, "TRACE: tracing enabled");
|
|
__strings = __chains = __links = 0;
|
|
#endif /* __GST_PARSE_TRACE */
|
|
|
|
/* g_print("Now scanning: %s\n", str); */
|
|
|
|
dstr = g_strdup (str);
|
|
priv_gst_parse_yylex_init (&scanner);
|
|
priv_gst_parse_yy_scan_string (dstr, scanner);
|
|
|
|
#if YYDEBUG
|
|
yydebug = 1;
|
|
#endif
|
|
|
|
if (yyparse (scanner, &g) != 0) {
|
|
SET_ERROR (error, GST_PARSE_ERROR_SYNTAX,
|
|
"Unrecoverable syntax error while parsing pipeline %s", str);
|
|
|
|
priv_gst_parse_yylex_destroy (scanner);
|
|
g_free (dstr);
|
|
|
|
goto error1;
|
|
}
|
|
priv_gst_parse_yylex_destroy (scanner);
|
|
g_free (dstr);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PIPELINE, "got %u elements and %u links",
|
|
g.chain ? g_slist_length (g.chain->elements) : 0,
|
|
g_slist_length (g.links));
|
|
|
|
/* ensure chain is not NULL */
|
|
if (!g.chain){
|
|
g.chain=gst_parse_chain_new ();
|
|
g.chain->elements=NULL;
|
|
g.chain->first.element=NULL;
|
|
g.chain->first.name=NULL;
|
|
g.chain->first.pads=NULL;
|
|
g.chain->last.element=NULL;
|
|
g.chain->last.name=NULL;
|
|
g.chain->last.pads=NULL;
|
|
};
|
|
|
|
/* ensure elements is not empty */
|
|
if(!g.chain->elements){
|
|
g.chain->elements= g_slist_prepend (NULL, NULL);
|
|
};
|
|
|
|
/* put all elements in our bin if necessary */
|
|
if(g.chain->elements->next){
|
|
bin = GST_BIN (gst_element_factory_make ("pipeline", NULL));
|
|
g_assert (bin);
|
|
|
|
for (walk = g.chain->elements; walk; walk = walk->next) {
|
|
if (walk->data != NULL)
|
|
gst_bin_add (bin, GST_ELEMENT (walk->data));
|
|
}
|
|
g_slist_free (g.chain->elements);
|
|
g.chain->elements = g_slist_prepend (NULL, bin);
|
|
}
|
|
|
|
ret = (GstElement *) g.chain->elements->data;
|
|
g_slist_free (g.chain->elements);
|
|
g.chain->elements=NULL;
|
|
if (GST_IS_BIN (ret))
|
|
bin = GST_BIN (ret);
|
|
gst_parse_free_chain (g.chain);
|
|
g.chain = NULL;
|
|
|
|
|
|
/* resolve and perform links */
|
|
for (walk = g.links; walk; walk = walk->next) {
|
|
link_t *l = (link_t *) walk->data;
|
|
int err;
|
|
err=gst_resolve_reference( &(l->src), ret);
|
|
if (err) {
|
|
if(-1==err){
|
|
SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
|
|
"No src-element named \"%s\" - omitting link", l->src.name);
|
|
}else{
|
|
/* probably a missing element which we've handled already */
|
|
SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
|
|
"No src-element found - omitting link");
|
|
}
|
|
gst_parse_free_link (l);
|
|
continue;
|
|
}
|
|
|
|
err=gst_resolve_reference( &(l->sink), ret);
|
|
if (err) {
|
|
if(-1==err){
|
|
SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
|
|
"No sink-element named \"%s\" - omitting link", l->src.name);
|
|
}else{
|
|
/* probably a missing element which we've handled already */
|
|
SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
|
|
"No sink-element found - omitting link");
|
|
}
|
|
gst_parse_free_link (l);
|
|
continue;
|
|
}
|
|
gst_parse_perform_link (l, &g);
|
|
}
|
|
g_slist_free (g.links);
|
|
|
|
out:
|
|
#ifdef __GST_PARSE_TRACE
|
|
GST_CAT_DEBUG (GST_CAT_PIPELINE,
|
|
"TRACE: %u strings, %u chains and %u links left", __strings, __chains,
|
|
__links);
|
|
if (__strings || __chains || __links) {
|
|
g_warning ("TRACE: %u strings, %u chains and %u links left", __strings,
|
|
__chains, __links);
|
|
}
|
|
#endif /* __GST_PARSE_TRACE */
|
|
|
|
return ret;
|
|
|
|
error1:
|
|
if (g.chain) {
|
|
gst_parse_free_chain (g.chain);
|
|
g.chain=NULL;
|
|
}
|
|
|
|
g_slist_foreach (g.links, (GFunc)gst_parse_free_link, NULL);
|
|
g_slist_free (g.links);
|
|
|
|
if (error)
|
|
g_assert (*error);
|
|
ret = NULL;
|
|
|
|
goto out;
|
|
}
|