| /* Generic video aggregator plugin |
| * Copyright (C) 2008 Wim Taymans <wim@fluendo.com> |
| * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk> |
| * |
| * 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., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef __GST_VIDEO_AGGREGATOR_H__ |
| #define __GST_VIDEO_AGGREGATOR_H__ |
| |
| #ifndef GST_USE_UNSTABLE_API |
| #warning "The Video library from gst-plugins-bad is unstable API and may change in future." |
| #warning "You can define GST_USE_UNSTABLE_API to avoid this warning." |
| #endif |
| |
| #include <gst/gst.h> |
| #include <gst/video/video.h> |
| #include <gst/base/gstaggregator.h> |
| |
| G_BEGIN_DECLS |
| |
| #define GST_TYPE_VIDEO_AGGREGATOR (gst_video_aggregator_get_type()) |
| #define GST_VIDEO_AGGREGATOR(obj) \ |
| (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_AGGREGATOR, GstVideoAggregator)) |
| #define GST_VIDEO_AGGREGATOR_CLASS(klass) \ |
| (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_AGGREGATOR, GstVideoAggregatorClass)) |
| #define GST_IS_VIDEO_AGGREGATOR(obj) \ |
| (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_AGGREGATOR)) |
| #define GST_IS_VIDEO_AGGREGATOR_CLASS(klass) \ |
| (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_AGGREGATOR)) |
| #define GST_VIDEO_AGGREGATOR_GET_CLASS(obj) \ |
| (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_VIDEO_AGGREGATOR,GstVideoAggregatorClass)) |
| |
| typedef struct _GstVideoAggregator GstVideoAggregator; |
| typedef struct _GstVideoAggregatorClass GstVideoAggregatorClass; |
| typedef struct _GstVideoAggregatorPrivate GstVideoAggregatorPrivate; |
| |
| #include "gstvideoaggregatorpad.h" |
| |
| /** |
| * GstVideoAggregator: |
| * @info: The #GstVideoInfo representing the currently set |
| * srcpad caps. |
| */ |
| struct _GstVideoAggregator |
| { |
| GstAggregator aggregator; |
| |
| /*< public >*/ |
| /* Output caps */ |
| GstVideoInfo info; |
| |
| /* < private > */ |
| GstVideoAggregatorPrivate *priv; |
| gpointer _gst_reserved[GST_PADDING_LARGE]; |
| }; |
| |
| /** |
| * GstVideoAggregatorClass: |
| * @update_caps: Optional. |
| * Lets subclasses update the #GstCaps representing |
| * the src pad caps before usage. Return %NULL to indicate failure. |
| * @fixate_caps: Fixate and return the src pad caps provided. The function takes |
| * ownership of @caps and returns a fixated version of |
| * @caps. @caps is not guaranteed to be writable. |
| * @aggregate_frames: Lets subclasses aggregate frames that are ready. Subclasses |
| * should iterate the GstElement.sinkpads and use the already |
| * mapped #GstVideoFrame from GstVideoAggregatorPad.aggregated_frame |
| * or directly use the #GstBuffer from GstVideoAggregatorPad.buffer |
| * if it needs to map the buffer in a special way. The result of the |
| * aggregation should land in @outbuffer. |
| * @get_output_buffer: Optional. |
| * Lets subclasses provide a #GstBuffer to be used as @outbuffer of |
| * the #aggregate_frames vmethod. |
| * @negotiated_caps: Optional. |
| * Notifies subclasses what caps format has been negotiated |
| * @find_best_format: Optional. |
| * Lets subclasses decide of the best common format to use. |
| **/ |
| struct _GstVideoAggregatorClass |
| { |
| /*< private >*/ |
| GstAggregatorClass parent_class; |
| |
| /*< public >*/ |
| GstCaps * (*update_caps) (GstVideoAggregator * videoaggregator, |
| GstCaps * caps, |
| GstCaps * filter_caps); |
| GstCaps * (*fixate_caps) (GstVideoAggregator * videoaggregator, |
| GstCaps * caps); |
| GstFlowReturn (*aggregate_frames) (GstVideoAggregator * videoaggregator, |
| GstBuffer * outbuffer); |
| GstFlowReturn (*get_output_buffer) (GstVideoAggregator * videoaggregator, |
| GstBuffer ** outbuffer); |
| gboolean (*negotiated_caps) (GstVideoAggregator * videoaggregator, |
| GstCaps * caps); |
| void (*find_best_format) (GstVideoAggregator * vagg, |
| GstCaps * downstream_caps, |
| GstVideoInfo * best_info, |
| gboolean * at_least_one_alpha); |
| |
| GstCaps *sink_non_alpha_caps; |
| |
| /* < private > */ |
| gpointer _gst_reserved[GST_PADDING_LARGE]; |
| }; |
| |
| GType gst_video_aggregator_get_type (void); |
| |
| G_END_DECLS |
| #endif /* __GST_VIDEO_AGGREGATOR_H__ */ |