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add methods to retreive the current frame as a thumbnail

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Brandon Lewis 2010-07-15 16:58:22 +02:00 committed by Edward Hervey
parent f8c7b00a0f
commit 70a040f760
2 changed files with 80 additions and 0 deletions
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73
ges/ges-timeline-pipeline.c
View file

@ -27,8 +27,10 @@
* Its usage is inspired by the 'playbin' element from gst-plugins-base.
*/
#include <gst/gst.h>
#include "ges-internal.h"
#include "ges-timeline-pipeline.h"
#include "ges-screenshot.h"
#define DEFAULT_TIMELINE_MODE TIMELINE_MODE_PREVIEW
@ -695,3 +697,74 @@ ges_timeline_pipeline_set_mode (GESTimelinePipeline * pipeline,
return TRUE;
}
/**
* ges_timeline_pipeline_get_thumbnail
* @self: a #GESTimelinePipeline in %GST_STATE_PLAYING or %GST_STATE_PAUSED
* @caps: caps specifying current format. Use %GST_CAPS_ANY for native size.
*
* Returns a #GstBuffer with the currently playing in the format specified by
* caps. The caller should unref the #gst_buffer_unref when finished. If %ANY
* caps are specified, the information will be returned in the whatever format
* is currently used by the sink. This information can be retrieve from caps
* associated with the buffer.
*
* Returns: a #GstBuffer or %NULL
*/
GstBuffer *
ges_timeline_pipeline_get_thumbnail (GESTimelinePipeline * self, GstCaps * caps)
{
GstElement *sink;
GstBuffer *buf;
sink = self->playsink;
if (!sink) {
GST_WARNING ("thumbnailing can only be done if we have a playsink");
return NULL;
}
/* FIXME (merge into core): this should be replaced with the "convert-frame"
* action */
buf = gst_play_sink_convert_frame (sink, caps);
return buf;
}
/**
* ges_timeline_pipeline_get_thumbnail_rgb24
* @self: a #GESTimelinePipeline in %GST_STATE_PLAYING or %GST_STATE_PAUSED
* @width: the requested width or -1 for native size
* @height: the requested height or -1 for native size
*
* A convenience method for ges_timeline_pipeline_get_thumbnail_raw which
* returns a buffer in 24-bit RGB, optionally scaled to the specified width
* and height. If -1 is specified for either dimension, it will be left at
* native size. You can retreive this information from the caps associated
* with the buffer.
*
* The caller is responsible for unreffing the returned buffer with
* #gst_buffer_unref.
*
* Returns: a #GstBuffer or %NULL
*/
GstBuffer *
ges_timeline_pipeline_get_thumbnail_rgb24 (GESTimelinePipeline * self,
gint width, gint height)
{
GstBuffer *ret;
GstCaps *caps;
caps = gst_caps_from_string ("video/x-raw-rgb,bpp=(int)24," "depth=(int)24");
if (width != -1)
gst_caps_set_simple (caps, "width", (gint) width, NULL);
if (height != -1)
gst_caps_set_simple (caps, "height", (gint) height, NULL);
ret = ges_timeline_pipeline_get_thumbnail (self, caps);
gst_caps_unref (caps);
return ret;
}

7
ges/ges-timeline-pipeline.h
View file

@ -108,6 +108,13 @@ gboolean ges_timeline_pipeline_set_render_settings (GESTimelinePipeline *pipelin
gboolean ges_timeline_pipeline_set_mode (GESTimelinePipeline *pipeline,
GESPipelineFlags mode);
GstBuffer *
ges_timeline_pipeline_get_thumbnail(GESTimelinePipeline *self, GstCaps *caps);
GstBuffer *
ges_timeline_pipeline_get_thumbnail_rgb24(GESTimelinePipeline *self,
gint width, gint height);
G_END_DECLS
#endif /* _GES_TIMELINE_PIPELINE */