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multifilesrc: Improve looping

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Add start-index and stop-index properties.
This commit is contained in:
David Schleef 2011-07-09 19:23:41 -07:00
parent 9149ce8d9d
commit abb646dcd1
2 changed files with 53 additions and 12 deletions
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62
gst/multifile/gstmultifilesrc.c
View file

@ -74,6 +74,8 @@ enum
ARG_0,
ARG_LOCATION,
ARG_INDEX,
ARG_START_INDEX,
ARG_STOP_INDEX,
ARG_CAPS,
ARG_LOOP
};
@ -123,6 +125,18 @@ gst_multi_file_src_class_init (GstMultiFileSrcClass * klass)
"index is incremented by one for each buffer read.",
0, INT_MAX, DEFAULT_INDEX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_START_INDEX,
g_param_spec_int ("start-index", "Start Index",
"Start value of index. The initial value of index can be set "
"either by setting index or start-index. When the end of the loop "
"is reached, the index will be set to the value start-index.",
0, INT_MAX, DEFAULT_INDEX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_STOP_INDEX,
g_param_spec_int ("stop-index", "Start Index",
"Stop value of index. The special value -1 means no stop.",
-1, INT_MAX, DEFAULT_INDEX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_CAPS,
g_param_spec_boxed ("caps", "Caps",
"Caps describing the format of the data.",
@ -149,8 +163,9 @@ static void
gst_multi_file_src_init (GstMultiFileSrc * multifilesrc,
GstMultiFileSrcClass * g_class)
{
multifilesrc->original_index = DEFAULT_INDEX;
multifilesrc->index = multifilesrc->original_index;
multifilesrc->start_index = DEFAULT_INDEX;
multifilesrc->index = DEFAULT_INDEX;
multifilesrc->stop_index = -1;
multifilesrc->filename = g_strdup (DEFAULT_LOCATION);
multifilesrc->successful_read = FALSE;
}
@ -239,8 +254,13 @@ gst_multi_file_src_set_property (GObject * object, guint prop_id,
gst_multi_file_src_set_location (src, g_value_get_string (value));
break;
case ARG_INDEX:
src->original_index = g_value_get_int (value);
src->index = src->original_index;
src->index = g_value_get_int (value);
break;
case ARG_START_INDEX:
src->start_index = g_value_get_int (value);
break;
case ARG_STOP_INDEX:
src->stop_index = g_value_get_int (value);
break;
case ARG_CAPS:
{
@ -278,6 +298,12 @@ gst_multi_file_src_get_property (GObject * object, guint prop_id,
case ARG_INDEX:
g_value_set_int (value, src->index);
break;
case ARG_START_INDEX:
g_value_set_int (value, src->start_index);
break;
case ARG_STOP_INDEX:
g_value_set_int (value, src->stop_index);
break;
case ARG_CAPS:
gst_value_set_caps (value, src->caps);
break;
@ -295,6 +321,7 @@ gst_multi_file_src_get_filename (GstMultiFileSrc * multifilesrc)
{
gchar *filename;
GST_ERROR ("%d", multifilesrc->index);
filename = g_strdup_printf (multifilesrc->filename, multifilesrc->index);
return filename;
@ -313,6 +340,9 @@ gst_multi_file_src_create (GstPushSrc * src, GstBuffer ** buffer)
multifilesrc = GST_MULTI_FILE_SRC (src);
if (multifilesrc->index < multifilesrc->start_index) {
multifilesrc->index = multifilesrc->start_index;
}
filename = gst_multi_file_src_get_filename (multifilesrc);
GST_DEBUG_OBJECT (multifilesrc, "reading from file \"%s\".", filename);
@ -326,13 +356,19 @@ gst_multi_file_src_create (GstPushSrc * src, GstBuffer ** buffer)
if (error != NULL)
g_error_free (error);
if (multifilesrc->loop
&& multifilesrc->index != multifilesrc->original_index) {
/* But we might be expected to loop, so let's go again. Make
* sure the original index and index aren't the same otherwise
* we'll just recurse to death in some error case. */
multifilesrc->index = multifilesrc->original_index;
return gst_multi_file_src_create (src, buffer);
if (multifilesrc->loop) {
error = NULL;
multifilesrc->index = multifilesrc->start_index;
filename = gst_multi_file_src_get_filename (multifilesrc);
ret = g_file_get_contents (filename, &data, &size, &error);
if (!ret) {
g_free (filename);
if (error != NULL)
g_error_free (error);
return GST_FLOW_UNEXPECTED;
}
} else {
return GST_FLOW_UNEXPECTED;
}
@ -343,6 +379,10 @@ gst_multi_file_src_create (GstPushSrc * src, GstBuffer ** buffer)
multifilesrc->successful_read = TRUE;
multifilesrc->index++;
if (multifilesrc->stop_index != -1 &&
multifilesrc->index >= multifilesrc->stop_index) {
multifilesrc->index = multifilesrc->start_index;
}
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = (unsigned char *) data;

3
gst/multifile/gstmultifilesrc.h
View file

@ -46,7 +46,8 @@ struct _GstMultiFileSrc
GstPushSrc parent;
gchar *filename;
int original_index;
int start_index;
int stop_index;
int index;
int offset;