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Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
/*
* Cogl-GStreamer.
*
* GStreamer integration library for Cogl.
*
* cogl-gst-video-sink.h - Gstreamer Video Sink that renders to a
* Cogl Pipeline.
*
* Authored by Jonathan Matthew <jonathan@kaolin.wh9.net>,
* Chris Lord <chris@openedhand.com>
* Damien Lespiau <damien.lespiau@intel.com>
* Matthew Allum <mallum@openedhand.com>
* Plamena Manolova <plamena.n.manolova@intel.com>
*
* Copyright (C) 2007, 2008 OpenedHand
* Copyright (C) 2009, 2010, 2013 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __COGL_GST_VIDEO_SINK_H__
#define __COGL_GST_VIDEO_SINK_H__
#include <glib-object.h>
#include <gst/base/gstbasesink.h>
#include <cogl/cogl.h>
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* SECTION:cogl-gst-video-sink
* @short_description: A video sink for integrating a GStreamer
* pipeline with a Cogl pipeline.
*
* #CoglGstVideoSink is a subclass of #GstBaseSink which can be used to
* create a #CoglPipeline for rendering the frames of the video.
*
* To create a basic video player, an application can create a
* #GstPipeline as normal using gst_pipeline_new() and set the
* sink on it to one created with cogl_gst_video_sink_new(). The
* application can then listen for the #CoglGstVideoSink::new-frame
* signal which will be emitted whenever there are new textures ready
* for rendering. For simple rendering, the application can just call
* cogl_gst_video_sink_get_pipeline() in the signal handler and use
* the returned pipeline to paint the new frame.
*
* An application is also free to do more advanced rendering by
* customizing the pipeline. In that case it should listen for the
* #CoglGstVideoSink::pipeline-ready signal which will be emitted as
* soon as the sink has determined enough information about the video
* to know how it should be rendered. In the handler for this signal,
* the application can either make modifications to a copy of the
* pipeline returned by cogl_gst_video_sink_get_pipeline() or it can
* create its own pipeline from scratch and ask the sink to configure
* it with cogl_gst_video_sink_setup_pipeline(). If a custom pipeline
* is created using one of these methods then the application should
* call cogl_gst_video_sink_attach_frame() on the pipeline before
* rendering in order to update the textures on the pipeline's layers.
*
* If the %COGL_FEATURE_ID_GLSL feature is available then the pipeline
* used by the sink will have a shader snippet with a function in it
* called cogl_gst_sample_video0 which takes a single vec2 argument.
* This can be used by custom snippets set the by the application to
* sample from the video. The vec2 argument represents the normalised
* coordinates within the video.
*
* Since: 1.16
*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
G_BEGIN_DECLS
#define COGL_GST_TYPE_VIDEO_SINK cogl_gst_video_sink_get_type()
#define COGL_GST_VIDEO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), \
COGL_GST_TYPE_VIDEO_SINK, CoglGstVideoSink))
#define COGL_GST_VIDEO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), \
COGL_GST_TYPE_VIDEO_SINK, CoglGstVideoSinkClass))
#define COGL_GST_IS_VIDEO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
COGL_GST_TYPE_VIDEO_SINK))
#define COGL_GST_IS_VIDEO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), \
COGL_GST_TYPE_VIDEO_SINK))
#define COGL_GST_VIDEO_SINK_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), \
COGL_GST_TYPE_VIDEO_SINK, CoglGstVideoSinkClass))
typedef struct _CoglGstVideoSink CoglGstVideoSink;
typedef struct _CoglGstVideoSinkClass CoglGstVideoSinkClass;
typedef struct _CoglGstVideoSinkPrivate CoglGstVideoSinkPrivate;
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* CoglGstVideoSink:
*
* The #CoglGstVideoSink structure contains only private data and
* should be accessed using the provided API.
*
* Since: 1.16
*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
struct _CoglGstVideoSink
{
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/*< private >*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
GstBaseSink parent;
CoglGstVideoSinkPrivate *priv;
};
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* CoglGstVideoSinkClass:
* @new_frame: handler for the #CoglGstVideoSink::new-frame signal
* @pipeline_ready: handler for the #CoglGstVideoSink::pipeline-ready signal
*
* Since: 1.16
*/
/**
* CoglGstVideoSink::new-frame:
* @sink: the #CoglGstVideoSink
*
* The sink will emit this signal whenever there are new textures
* available for a new frame of the video. After this signal is
* emitted, an application can call cogl_gst_video_sink_get_pipeline()
* to get a pipeline suitable for rendering the frame. If the
* application is using a custom pipeline it can alternatively call
* cogl_gst_video_sink_attach_frame() to attach the textures.
*
* Since: 1.16
*/
/**
* CoglGstVideoSink::pipeline-ready:
* @sink: the #CoglGstVideoSink
*
* The sink will emit this signal as soon as it has gathered enough
* information from the video to configure a pipeline. If the
* application wants to do some customized rendering, it can setup its
* pipeline after this signal is emitted. The application's pipeline
* will typically either be a copy of the one returned by
* cogl_gst_video_sink_get_pipeline() or it can be a completely custom
* pipeline which is setup using cogl_gst_video_sink_setup_pipeline().
*
* Note that it is an error to call either of those functions before
* this signal is emitted. The #CoglGstVideoSink::new-frame signal
* will only be emitted after the pipeline is ready so the application
* could also create its pipeline in the handler for that.
*
* Since: 1.16
*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
struct _CoglGstVideoSinkClass
{
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/*< private >*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
GstBaseSinkClass parent_class;
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/*< public >*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
void (* new_frame) (CoglGstVideoSink *sink);
void (* pipeline_ready) (CoglGstVideoSink *sink);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/*< private >*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
void *_padding_dummy[8];
};
cogl-gst: pedantic style fixes in cogl-gst-video-sink.h There were a few hugging pointer asterisks and inconsistent newlines for a prototype which this patch tweaks. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 488c074316b270b17d1000c68f26210108b1b0ca)
2013-03-19 18:54:39 +00:00
GType
cogl_gst_video_sink_get_type (void) G_GNUC_CONST;
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* cogl_gst_video_sink_new:
* @ctx: The #CoglContext
*
* Creates a new #CoglGstVideoSink which will create resources for use
* with the given context.
*
* Return value: a new #CoglGstVideoSink
* Since: 1.16
*/
cogl-gst: pedantic style fixes in cogl-gst-video-sink.h There were a few hugging pointer asterisks and inconsistent newlines for a prototype which this patch tweaks. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 488c074316b270b17d1000c68f26210108b1b0ca)
2013-03-19 18:54:39 +00:00
CoglGstVideoSink *
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
cogl_gst_video_sink_new (CoglContext *ctx);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* cogl_gst_video_sink_get_pipeline:
* @vt: The #CoglGstVideoSink
*
* Returns a pipeline suitable for rendering the current frame of the
* given video sink. The pipeline will already have the textures for
* the frame attached. For simple rendering, an application will
* typically call this function immediately before it paints the
* video. It can then just paint a rectangle using the returned
* pipeline.
*
* An application is free to make a copy of this
* pipeline and modify it for custom rendering.
*
* Note: it is considered an error to call this function before the
* #CoglGstVideoSink::pipeline-ready signal is emitted.
*
* Return value: the pipeline for rendering the current frame
* Since: 1.16
*/
cogl-gst: pedantic style fixes in cogl-gst-video-sink.h There were a few hugging pointer asterisks and inconsistent newlines for a prototype which this patch tweaks. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 488c074316b270b17d1000c68f26210108b1b0ca)
2013-03-19 18:54:39 +00:00
CoglPipeline *
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
cogl_gst_video_sink_get_pipeline (CoglGstVideoSink *vt);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* cogl_gst_video_sink_set_context:
* @vt: The #CoglGstVideoSink
* @ctx: The #CoglContext for the sink to use
*
* Sets the #CoglContext that the video sink should use for creating
* any resources. This function would normally only be used if the
* sink was constructed via gst_element_factory_make() instead of
* cogl_gst_video_sink_new().
*
* Since: 1.16
*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
void
cogl_gst_video_sink_set_context (CoglGstVideoSink *vt,
CoglContext *ctx);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* cogl_gst_video_sink_get_free_layer:
* @sink: The #CoglGstVideoSink
*
* This can be used when doing specialised rendering of the video by
* customizing the pipeline. #CoglGstVideoSink may use up to three
* private layers on the pipeline in order to attach the textures of
* the video frame. This function will return the index of the next
* available unused layer after the sink's internal layers. This can
* be used by the application to add additional layers, for example to
* blend in another color in the fragment processing.
*
* Return value: the index of the next available layer after the
* sink's internal layers.
* Since: 1.16
*/
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
int
cogl_gst_video_sink_get_free_layer (CoglGstVideoSink *sink);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* cogl_gst_video_sink_attach_frame:
* @sink: The #CoglGstVideoSink
* @pln: A #CoglPipeline
*
* Updates the given pipeline with the textures for the current frame.
* This can be used if the application wants to customize the
* rendering using its own pipeline. Typically this would be called in
* response to the #CoglGstVideoSink::new-frame signal which is
* emitted whenever the new textures are available. The application
* would then make a copy of its template pipeline and call this to
* set the textures.
*
* Since: 1.16
*/
cogl-gst: Remove the return value from attach_frame() Previously cogl_gst_video_sink_attach_frame returned the last layer used by the sink. This can also be retrieved via cogl_gst_video_sink_get_free_layer so I don't think it's necessary to return it here and it seems kind of out of place. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 0805f3e9db715fc2c97b7e60d4f3a25e7fa598fc)
2013-04-25 18:01:37 +00:00
void
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
cogl_gst_video_sink_attach_frame (CoglGstVideoSink *sink,
CoglPipeline *pln);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* cogl_gst_video_sink_set_first_layer:
* @sink: The #CoglGstVideoSink
* @first_layer: The new first layer
*
* Sets the index of the first layer that the sink will use for its
* rendering. This is useful if the application wants to have custom
* layers that appear before the layers added by the sink. In that
* case by default the sink's layers will be modulated with the result
* of the application's layers that come before @first_layer.
*
* Note that if this function is called then the name of the function
* to call in the shader snippets to sample the video will also
* change. For example, if @first_layer is three then the function
* will be cogl_gst_sample_video3.
*
* Since: 1.16
*/
cogl-gst: Add a functions to facilitate layering These functions are used when attaching frames at a start point other than layer 0 is required. This could potentially be used to "layer" videos and textures on top of each other in the CoglPipeline. This layering could come handy if videos are used as alpha masks or normal maps, or when arranging layers in a perticular order, so Cogl could blend them nicely without extra hassle. Reviewed-by: Neil Roberts <neil@linux.intel.com> Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit f98b437c9ea79f04ef1ebbb6ff547f58b49b0008)
2013-04-16 17:15:28 +00:00
void
cogl_gst_video_sink_set_first_layer (CoglGstVideoSink *sink,
int first_layer);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* cogl_gst_video_sink_set_default_sample:
* @sink: The #CoglGstVideoSink
* @default_sample: Whether to add the default sampling
*
* By default the pipeline generated by
* cogl_gst_video_sink_setup_pipeline() and
* cogl_gst_video_sink_get_pipeline() will have a layer with a shader
* snippet that automatically samples the video. If the application
* wants to sample the video in a completely custom way using its own
* shader snippet it can set @default_sample to %FALSE to avoid this
* default snippet being added. In that case the application's snippet
* can call cogl_gst_sample_video0 to sample the texture itself.
*
* Since: 1.16
*/
cogl-gst: Add a functions to facilitate layering These functions are used when attaching frames at a start point other than layer 0 is required. This could potentially be used to "layer" videos and textures on top of each other in the CoglPipeline. This layering could come handy if videos are used as alpha masks or normal maps, or when arranging layers in a perticular order, so Cogl could blend them nicely without extra hassle. Reviewed-by: Neil Roberts <neil@linux.intel.com> Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit f98b437c9ea79f04ef1ebbb6ff547f58b49b0008)
2013-04-16 17:15:28 +00:00
void
cogl_gst_video_sink_set_default_sample (CoglGstVideoSink *sink,
CoglBool default_sample);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
/**
* cogl_gst_video_sink_setup_pipeline:
* @sink: The #CoglGstVideoSink
* @pipeline: A #CoglPipeline
*
* Configures the given pipeline so that will be able to render the
* video for the @sink. This should only be used if the application
* wants to perform some custom rendering using its own pipeline.
* Typically an application will call this in response to the
* #CoglGstVideoSink::pipeline-ready signal.
*
* Note: it is considered an error to call this function before the
* #CoglGstVideoSink::pipeline-ready signal is emitted.
*
* Since: 1.16
*/
cogl-gst: Add a functions to facilitate layering These functions are used when attaching frames at a start point other than layer 0 is required. This could potentially be used to "layer" videos and textures on top of each other in the CoglPipeline. This layering could come handy if videos are used as alpha masks or normal maps, or when arranging layers in a perticular order, so Cogl could blend them nicely without extra hassle. Reviewed-by: Neil Roberts <neil@linux.intel.com> Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit f98b437c9ea79f04ef1ebbb6ff547f58b49b0008)
2013-04-16 17:15:28 +00:00
void
cogl_gst_video_sink_setup_pipeline (CoglGstVideoSink *sink,
CoglPipeline *pipeline);
cogl-gst: Add some documentation Adds documentation comments to CoglGstVideoSink and makes it generate a separate manual to contain it. One thing that I wasn't able to figure out with this was how to get the documentation to have correct references to the main Cogl docs. You can pass arguments to gtkdoc-fixxref to point to other manuals, but presumably this needs the installed locations and when the Cogl-Gst documentation is generated the Cogl docs may not have been installed yet. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5acdf8db47311893a9cf9ea04a66a287b657b8b0)
2013-04-24 18:43:00 +00:00
cogl-gst: expose aspect ratio apis This adds several utility apis that aim to make it as easy as possible for an application to determine what size a video should be drawn at. The important detail here is that these apis take into account the pixel-aspect-ratio in addition to the video's own aspect ratio. This patch updates the cogl-basic-video-player example to use the cogl_gst_video_sink_fit_size() api to perform letterboxing. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit d26f17c97ff6b9f6d6211e0527d5965a85305a56)
2013-04-25 23:57:06 +00:00
/**
* cogl_gst_video_sink_get_aspect:
* @sink: A #CoglGstVideoSink
*
* Returns a width-for-height aspect ratio that lets you calculate a
* suitable width for displaying your video based on a given height by
* multiplying your chosen height by the returned aspect ratio.
*
* This aspect ratio is calculated based on the underlying size of the
* video buffers and the current pixel-aspect-ratio.
*
* Return value: a width-for-height aspect ratio
*
* Since: 1.16
* Stability: unstable
*/
float
cogl_gst_video_sink_get_aspect (CoglGstVideoSink *sink);
/**
* cogl_gst_video_sink_get_width_for_height:
* @sink: A #CoglGstVideoSink
* @height: A specific output @height
*
* Calculates a suitable output width for a specific output @height
* that will maintain the video's aspect ratio.
*
* Return value: An output width for the given output @height.
*
* Since: 1.16
* Stability: unstable
*/
float
cogl_gst_video_sink_get_width_for_height (CoglGstVideoSink *sink,
float height);
/**
* cogl_gst_video_sink_get_height_for_width:
* @sink: A #CoglGstVideoSink
* @width: A specific output @width
*
* Calculates a suitable output height for a specific output @width
* that will maintain the video's aspect ratio.
*
* Return value: An output height for the given output @width.
*
* Since: 1.16
* Stability: unstable
*/
float
cogl_gst_video_sink_get_height_for_width (CoglGstVideoSink *sink,
float width);
/**
* CoglGstRectangle:
* @x: The X coordinate of the top left of the rectangle
* @y: The Y coordinate of the top left of the rectangle
* @width: The width of the rectangle
* @height: The height of the rectangle
*
* Describes a rectangle that can be used for video output.
*/
typedef struct _CoglGstRectangle
{
float x;
float y;
float width;
float height;
} CoglGstRectangle;
/**
* cogl_gst_video_sink_fit_size:
* @sink: A #CoglGstVideoSink
* @available: The space available for video output
* @output: The return location for the calculated output position
*
* Calculates a suitable @output rectangle that can fit inside the
* @available space while maintaining the aspect ratio of the current
* video.
*
* Applications would typically use this api for "letterboxing" by
* using this api to position a video inside a fixed screen space and
* filling the remaining space with black borders.
*
* Since: 1.16
* Stability: unstable
*/
void
cogl_gst_video_sink_fit_size (CoglGstVideoSink *sink,
const CoglGstRectangle *available,
CoglGstRectangle *output);
Include CoglGst CoglGst is a GStreamer integration library that facilitates video playback using the Cogl API. It works by retrieving each video frame from the GStreamer pipeline and attaching it to a Cogl pipeline in the form of a Cogl texture along with possible color model conversion shaders. The pipeline is then retrieved by the user during each draw. An example use of the CoglGst API is included in the examples directory. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit dfb94cf4b0b6b42d6465df362a0c0af780596890)
2013-02-22 14:56:05 +00:00
G_END_DECLS
#endif
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