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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)
This commit is contained in:
Neil Roberts
Lionel Landwerlin
parent
c50b302fc4
commit
5f86563c86
13
.gitignore
vendored
13
.gitignore
vendored
@ -60,6 +60,19 @@ depcomp
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/doc/reference/cogl2/cogl2-docs.xml
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/doc/reference/cogl2/*.stamp
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/doc/reference/cogl2/*.bak
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/doc/reference/cogl-gst/cogl-gst-*.txt
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!/doc/reference/cogl-gst/cogl-gst-sections.txt
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/doc/reference/cogl-gst/html
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/doc/reference/cogl-gst/tmpl
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/doc/reference/cogl-gst/xml
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/doc/reference/cogl-gst/cogl-gst.args
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/doc/reference/cogl-gst/cogl-gst.hierarchy
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/doc/reference/cogl-gst/cogl-gst.interfaces
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/doc/reference/cogl-gst/cogl-gst.prerequisites
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/doc/reference/cogl-gst/cogl-gst.signals
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/doc/reference/cogl-gst/cogl-gst-docs.xml
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/doc/reference/cogl-gst/*.stamp
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/doc/reference/cogl-gst/*.bak
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/examples/cogl-crate
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/examples/cogl-gles2-context
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/examples/cogl-gles2-gears
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@ -37,6 +37,46 @@
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#include <gst/base/gstbasesink.h>
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#include <cogl/cogl.h>
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/**
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* SECTION:cogl-gst-video-sink
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* @short_description: A video sink for integrating a GStreamer
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* pipeline with a Cogl pipeline.
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*
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* #CoglGstVideoSink is a subclass of #GstBaseSink which can be used to
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* create a #CoglPipeline for rendering the frames of the video.
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*
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* To create a basic video player, an application can create a
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* #GstPipeline as normal using gst_pipeline_new() and set the
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* sink on it to one created with cogl_gst_video_sink_new(). The
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* application can then listen for the #CoglGstVideoSink::new-frame
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* signal which will be emitted whenever there are new textures ready
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* for rendering. For simple rendering, the application can just call
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* cogl_gst_video_sink_get_pipeline() in the signal handler and use
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* the returned pipeline to paint the new frame.
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*
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* An application is also free to do more advanced rendering by
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* customizing the pipeline. In that case it should listen for the
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* #CoglGstVideoSink::pipeline-ready signal which will be emitted as
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* soon as the sink has determined enough information about the video
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* to know how it should be rendered. In the handler for this signal,
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* the application can either make modifications to a copy of the
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* pipeline returned by cogl_gst_video_sink_get_pipeline() or it can
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* create its own pipeline from scratch and ask the sink to configure
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* it with cogl_gst_video_sink_setup_pipeline(). If a custom pipeline
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* is created using one of these methods then the application should
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* call cogl_gst_video_sink_attach_frame() on the pipeline before
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* rendering in order to update the textures on the pipeline's layers.
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*
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* If the %COGL_FEATURE_ID_GLSL feature is available then the pipeline
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* used by the sink will have a shader snippet with a function in it
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* called cogl_gst_sample_video0 which takes a single vec2 argument.
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* This can be used by custom snippets set the by the application to
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* sample from the video. The vec2 argument represents the normalised
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* coordinates within the video.
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*
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* Since: 1.16
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*/
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G_BEGIN_DECLS
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#define COGL_GST_TYPE_VIDEO_SINK cogl_gst_video_sink_get_type()
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@ -77,53 +117,234 @@ typedef struct _CoglGstVideoSink CoglGstVideoSink;
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typedef struct _CoglGstVideoSinkClass CoglGstVideoSinkClass;
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typedef struct _CoglGstVideoSinkPrivate CoglGstVideoSinkPrivate;
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/**
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* CoglGstVideoSink:
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*
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* The #CoglGstVideoSink structure contains only private data and
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* should be accessed using the provided API.
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*
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* Since: 1.16
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*/
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struct _CoglGstVideoSink
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{
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/*< private >*/
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GstBaseSink parent;
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CoglGstVideoSinkPrivate *priv;
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};
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/**
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* CoglGstVideoSinkClass:
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* @new_frame: handler for the #CoglGstVideoSink::new-frame signal
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* @pipeline_ready: handler for the #CoglGstVideoSink::pipeline-ready signal
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*
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* Since: 1.16
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*/
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/**
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* CoglGstVideoSink::new-frame:
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* @sink: the #CoglGstVideoSink
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*
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* The sink will emit this signal whenever there are new textures
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* available for a new frame of the video. After this signal is
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* emitted, an application can call cogl_gst_video_sink_get_pipeline()
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* to get a pipeline suitable for rendering the frame. If the
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* application is using a custom pipeline it can alternatively call
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* cogl_gst_video_sink_attach_frame() to attach the textures.
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*
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* Since: 1.16
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*/
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/**
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* CoglGstVideoSink::pipeline-ready:
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* @sink: the #CoglGstVideoSink
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*
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* The sink will emit this signal as soon as it has gathered enough
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* information from the video to configure a pipeline. If the
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* application wants to do some customized rendering, it can setup its
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* pipeline after this signal is emitted. The application's pipeline
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* will typically either be a copy of the one returned by
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* cogl_gst_video_sink_get_pipeline() or it can be a completely custom
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* pipeline which is setup using cogl_gst_video_sink_setup_pipeline().
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*
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* Note that it is an error to call either of those functions before
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* this signal is emitted. The #CoglGstVideoSink::new-frame signal
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* will only be emitted after the pipeline is ready so the application
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* could also create its pipeline in the handler for that.
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*
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* Since: 1.16
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*/
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struct _CoglGstVideoSinkClass
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{
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/*< private >*/
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GstBaseSinkClass parent_class;
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/*< public >*/
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void (* new_frame) (CoglGstVideoSink *sink);
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void (* pipeline_ready) (CoglGstVideoSink *sink);
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/*< private >*/
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void *_padding_dummy[8];
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};
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GType
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cogl_gst_video_sink_get_type (void) G_GNUC_CONST;
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/**
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* cogl_gst_video_sink_new:
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* @ctx: The #CoglContext
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*
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* Creates a new #CoglGstVideoSink which will create resources for use
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* with the given context.
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*
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* Return value: a new #CoglGstVideoSink
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* Since: 1.16
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*/
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CoglGstVideoSink *
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cogl_gst_video_sink_new (CoglContext *ctx);
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/**
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* cogl_gst_video_sink_get_pipeline:
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* @vt: The #CoglGstVideoSink
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*
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* Returns a pipeline suitable for rendering the current frame of the
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* given video sink. The pipeline will already have the textures for
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* the frame attached. For simple rendering, an application will
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* typically call this function immediately before it paints the
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* video. It can then just paint a rectangle using the returned
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* pipeline.
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*
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* An application is free to make a copy of this
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* pipeline and modify it for custom rendering.
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*
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* Note: it is considered an error to call this function before the
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* #CoglGstVideoSink::pipeline-ready signal is emitted.
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*
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* Return value: the pipeline for rendering the current frame
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* Since: 1.16
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*/
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CoglPipeline *
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cogl_gst_video_sink_get_pipeline (CoglGstVideoSink *vt);
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/**
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* cogl_gst_video_sink_set_context:
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* @vt: The #CoglGstVideoSink
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* @ctx: The #CoglContext for the sink to use
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*
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* Sets the #CoglContext that the video sink should use for creating
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* any resources. This function would normally only be used if the
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* sink was constructed via gst_element_factory_make() instead of
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* cogl_gst_video_sink_new().
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*
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* Since: 1.16
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*/
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void
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cogl_gst_video_sink_set_context (CoglGstVideoSink *vt,
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CoglContext *ctx);
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/**
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* cogl_gst_video_sink_get_free_layer:
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* @sink: The #CoglGstVideoSink
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*
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* This can be used when doing specialised rendering of the video by
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* customizing the pipeline. #CoglGstVideoSink may use up to three
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* private layers on the pipeline in order to attach the textures of
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* the video frame. This function will return the index of the next
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* available unused layer after the sink's internal layers. This can
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* be used by the application to add additional layers, for example to
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* blend in another color in the fragment processing.
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*
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* Return value: the index of the next available layer after the
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* sink's internal layers.
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* Since: 1.16
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*/
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int
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cogl_gst_video_sink_get_free_layer (CoglGstVideoSink *sink);
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/**
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* cogl_gst_video_sink_attach_frame:
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* @sink: The #CoglGstVideoSink
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* @pln: A #CoglPipeline
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*
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* Updates the given pipeline with the textures for the current frame.
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* This can be used if the application wants to customize the
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* rendering using its own pipeline. Typically this would be called in
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* response to the #CoglGstVideoSink::new-frame signal which is
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* emitted whenever the new textures are available. The application
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* would then make a copy of its template pipeline and call this to
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* set the textures.
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*
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* Return value: the next free layer after the sink's internal private
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* layers. This is the same value that is returned by
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* cogl_gst_video_sink_get_free_layer().
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* Since: 1.16
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*/
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int
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cogl_gst_video_sink_attach_frame (CoglGstVideoSink *sink,
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CoglPipeline *pln);
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/**
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* cogl_gst_video_sink_set_first_layer:
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* @sink: The #CoglGstVideoSink
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* @first_layer: The new first layer
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*
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* Sets the index of the first layer that the sink will use for its
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* rendering. This is useful if the application wants to have custom
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* layers that appear before the layers added by the sink. In that
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* case by default the sink's layers will be modulated with the result
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* of the application's layers that come before @first_layer.
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*
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* Note that if this function is called then the name of the function
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* to call in the shader snippets to sample the video will also
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* change. For example, if @first_layer is three then the function
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* will be cogl_gst_sample_video3.
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*
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* Since: 1.16
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*/
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void
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cogl_gst_video_sink_set_first_layer (CoglGstVideoSink *sink,
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int first_layer);
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/**
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* cogl_gst_video_sink_set_default_sample:
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* @sink: The #CoglGstVideoSink
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* @default_sample: Whether to add the default sampling
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*
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* By default the pipeline generated by
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* cogl_gst_video_sink_setup_pipeline() and
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* cogl_gst_video_sink_get_pipeline() will have a layer with a shader
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* snippet that automatically samples the video. If the application
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* wants to sample the video in a completely custom way using its own
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* shader snippet it can set @default_sample to %FALSE to avoid this
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* default snippet being added. In that case the application's snippet
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* can call cogl_gst_sample_video0 to sample the texture itself.
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*
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* Since: 1.16
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*/
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void
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cogl_gst_video_sink_set_default_sample (CoglGstVideoSink *sink,
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CoglBool default_sample);
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/**
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* cogl_gst_video_sink_setup_pipeline:
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* @sink: The #CoglGstVideoSink
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* @pipeline: A #CoglPipeline
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*
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* Configures the given pipeline so that will be able to render the
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* video for the @sink. This should only be used if the application
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* wants to perform some custom rendering using its own pipeline.
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* Typically an application will call this in response to the
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* #CoglGstVideoSink::pipeline-ready signal.
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*
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* Note: it is considered an error to call this function before the
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* #CoglGstVideoSink::pipeline-ready signal is emitted.
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*
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* Since: 1.16
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*/
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void
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cogl_gst_video_sink_setup_pipeline (CoglGstVideoSink *sink,
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CoglPipeline *pipeline);
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G_END_DECLS
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#endif
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@ -516,6 +516,10 @@ AS_IF([test "x$enable_cogl_gst" = "xyes"],
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dnl define location of gstreamer plugin directory
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plugindir="\$(libdir)/gstreamer-$GST_MAJORMINOR"
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AC_SUBST(plugindir)
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dnl For the gtk doc generation
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GSTREAMER_PREFIX="`$PKG_CONFIG --variable=prefix gstreamer-1.0`"
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AC_SUBST(GSTREAMER_PREFIX)
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]
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)
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@ -1441,6 +1445,8 @@ doc/reference/cogl/Makefile
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doc/reference/cogl/cogl-docs.xml
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doc/reference/cogl-2.0-experimental/Makefile
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doc/reference/cogl-2.0-experimental/cogl-2.0-experimental-docs.xml
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doc/reference/cogl-gst/Makefile
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doc/reference/cogl-gst/cogl-gst-docs.xml
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examples/Makefile
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tests/Makefile
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tests/config.env
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@ -1 +1,5 @@
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SUBDIRS = cogl cogl-2.0-experimental
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if BUILD_COGL_GST
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SUBDIRS += cogl-gst
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endif
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106
doc/reference/cogl-gst/Makefile.am
Normal file
106
doc/reference/cogl-gst/Makefile.am
Normal file
@ -0,0 +1,106 @@
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## Process this file with automake to produce Makefile.in
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# We require automake 1.6 at least.
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AUTOMAKE_OPTIONS = 1.6
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# This is a blank Makefile.am for using gtk-doc.
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# Copy this to your project's API docs directory and modify the variables to
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# suit your project. See the GTK+ Makefiles in gtk+/docs/reference for examples
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# of using the various options.
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# The name of the module, e.g. 'glib'.
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DOC_MODULE=cogl-gst
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# The top-level SGML file. You can change this if you want to.
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DOC_MAIN_SGML_FILE=$(DOC_MODULE)-docs.xml
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# The directory containing the source code. Relative to $(srcdir).
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# gtk-doc will search all .c & .h files beneath here for inline comments
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# documenting the functions and macros.
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# e.g. DOC_SOURCE_DIR=../../../gtk
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DOC_SOURCE_DIR=../../../cogl-gst
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# Extra options to pass to gtkdoc-scangobj. Not normally needed.
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SCANGOBJ_OPTIONS=--type-init-func="gst_init(NULL, NULL)"
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# Extra options to supply to gtkdoc-scan.
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# e.g. SCAN_OPTIONS=--deprecated-guards="GTK_DISABLE_DEPRECATED"
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SCAN_OPTIONS=--deprecated-guards="COGL_DISABLE_DEPRECATED"
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# Extra options to supply to gtkdoc-mkdb.
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# e.g. MKDB_OPTIONS=--sgml-mode --output-format=xml
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MKDB_OPTIONS=--sgml-mode --output-format=xml --name-space=cogl_gst
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# Extra options to supply to gtkdoc-mktmpl
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# e.g. MKTMPL_OPTIONS=--only-section-tmpl
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MKTMPL_OPTIONS=
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# Extra options to supply to gtkdoc-fixref. Not normally needed.
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# e.g. FIXXREF_OPTIONS=--extra-dir=../gdk-pixbuf/html --extra-dir=../gdk/html
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FIXXREF_OPTIONS=\
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--extra-dir=$(GLIB_PREFIX)/share/gtk-doc/html/glib \
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--extra-dir=$(GDKPIXBUF_PREFIX)/share/gtk-doc/html/gdk-pixbuf \
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--extra-dir=$(GSTREAMER_PREFIX)/share/gtk-doc/html/gstreamer-1.0 \
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--extra-dir=$(GSTREAMER_PREFIX)/share/gtk-doc/html/gstreamer-libs-1.0
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# Used for dependencies. The docs will be rebuilt if any of these change.
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# e.g. HFILE_GLOB=$(top_srcdir)/gtk/*.h
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# e.g. CFILE_GLOB=$(top_srcdir)/gtk/*.c
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HFILE_GLOB=\
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$(top_srcdir)/cogl/*.h \
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$(top_builddir)/cogl/*.h \
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$(top_srcdir)/cogl/winsys/*.h \
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$(top_srcdir)/cogl-gst/*.h
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CFILE_GLOB=$(top_srcdir)/cogl-gst/*.c
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IGNORE_HFILES=\
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$(NULL)
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EXTRA_HFILES=
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# Images to copy into HTML directory.
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# e.g. HTML_IMAGES=$(top_srcdir)/gtk/stock-icons/stock_about_24.png
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HTML_IMAGES=\
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$(NULL)
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# Extra SGML files that are included by $(DOC_MAIN_SGML_FILE).
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# e.g. content_files=running.sgml building.sgml changes-2.0.sgml
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content_files=\
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$(NULL)
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# SGML files where gtk-doc abbrevations (#GtkWidget) are expanded
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# These files must be listed here *and* in content_files
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# e.g. expand_content_files=running.sgml
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expand_content_files=\
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$(NULL)
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# CFLAGS and LDFLAGS for compiling gtkdoc-scangobj with your library.
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||||
# Only needed if you are using gtkdoc-scangobj to dynamically query widget
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# signals and properties.
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||||
# e.g. AM_CPPFLAGS=-I$(top_srcdir) -I$(top_builddir) $(GTK_DEBUG_FLAGS)
|
||||
# e.g. GTKDOC_LIBS=$(top_builddir)/gtk/$(gtktargetlib)
|
||||
|
||||
AM_CPPFLAGS=\
|
||||
-I$(top_srcdir) \
|
||||
-I$(top_builddir)/cogl \
|
||||
-DCOGL_ENABLE_EXPERIMENTAL_API \
|
||||
$(COGL_DEP_CFLAGS) \
|
||||
$(COGL_GST_DEP_CFLAGS)
|
||||
|
||||
GTKDOC_LIBS=\
|
||||
$(top_builddir)/cogl/libcogl2.la \
|
||||
$(top_builddir)/cogl-gst/libcogl-gst.la \
|
||||
$(COGL_DEP_LIBS) \
|
||||
$(COGL_GST_DEP_LIBS)
|
||||
|
||||
# This includes the standard gtk-doc make rules, copied by gtkdocize.
|
||||
if BUILD_GTK_DOC
|
||||
include $(top_srcdir)/gtk-doc.make
|
||||
else
|
||||
EXTRA_DIST =
|
||||
endif
|
||||
|
||||
# Other files to distribute
|
||||
# e.g. EXTRA_DIST += version.xml.in
|
||||
|
||||
EXTRA_DIST += $(HTML_IMAGES) $(content_files)
|
||||
105
doc/reference/cogl-gst/cogl-gst-docs.xml.in
Normal file
105
doc/reference/cogl-gst/cogl-gst-docs.xml.in
Normal file
@ -0,0 +1,105 @@
|
||||
<?xml version="1.0"?>
|
||||
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
|
||||
<!ENTITY version "@VERSION@">
|
||||
]>
|
||||
<book id="index" xmlns:xi="http://www.w3.org/2003/XInclude">
|
||||
|
||||
<bookinfo>
|
||||
<title>Cogl GST 2.0 Reference Manual</title>
|
||||
<releaseinfo>for Cogl &version;</releaseinfo>
|
||||
|
||||
<copyright>
|
||||
<year>2013</year>
|
||||
<holder>Intel Corporation</holder>
|
||||
</copyright>
|
||||
|
||||
<legalnotice>
|
||||
<para>
|
||||
Permission is granted to copy, distribute and/or modify this
|
||||
document under the terms of the <citetitle>GNU Free
|
||||
Documentation License</citetitle>, Version 1.1 or any later
|
||||
version published by the Free Software Foundation with no
|
||||
Invariant Sections, no Front-Cover Texts, and no Back-Cover
|
||||
Texts. You may obtain a copy of the <citetitle>GNU Free
|
||||
Documentation License</citetitle> from the Free Software
|
||||
Foundation by visiting <ulink type="http"
|
||||
url="http://www.fsf.org">their Web site</ulink> or by writing
|
||||
to:
|
||||
|
||||
<address>
|
||||
The Free Software Foundation, Inc.,
|
||||
<street>59 Temple Place</street> - Suite 330,
|
||||
<city>Boston</city>, <state>MA</state> <postcode>02111-1307</postcode>,
|
||||
<country>USA</country>
|
||||
</address>
|
||||
</para>
|
||||
</legalnotice>
|
||||
|
||||
</bookinfo>
|
||||
|
||||
<chapter>
|
||||
<title>Cogl GST - a library for integrating GStreamer with Cogl</title>
|
||||
|
||||
<section id="cogl-gst-intro">
|
||||
<title>About Cogl GST</title>
|
||||
|
||||
<para>Cogl GST is a small library which provides a GStreamer
|
||||
sink which can manage a CoglPipeline to render a video within a
|
||||
Cogl scene.</para>
|
||||
|
||||
</section>
|
||||
|
||||
<section id="cogl-gst-general-apis">
|
||||
<title>General APIs</title>
|
||||
<xi:include href="xml/cogl-gst-video-sink.xml"/>
|
||||
</section>
|
||||
|
||||
</chapter>
|
||||
|
||||
<chapter id="coglglossary">
|
||||
<title>Glossaries</title>
|
||||
|
||||
<xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>
|
||||
</chapter>
|
||||
|
||||
<index>
|
||||
<title>Index of all symbols</title>
|
||||
<xi:include href="xml/api-index-full.xml"><xi:fallback /></xi:include>
|
||||
</index>
|
||||
|
||||
<appendix id="license">
|
||||
<title>License</title>
|
||||
|
||||
<para>
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the <citetitle>GNU Library General
|
||||
Public License</citetitle> as published by the Free Software
|
||||
Foundation; either version 2 of the License, or (at your option)
|
||||
any later version.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
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
|
||||
<citetitle>GNU Library General Public License</citetitle> for
|
||||
more details.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
You may obtain a copy of the <citetitle>GNU Library General
|
||||
Public License</citetitle> from the Free Software Foundation by
|
||||
visiting <ulink type="http" url="http://www.fsf.org">their Web
|
||||
site</ulink> or by writing to:
|
||||
|
||||
<address>
|
||||
Free Software Foundation, Inc.
|
||||
<street>59 Temple Place</street> - Suite 330
|
||||
<city>Boston</city>, <state>MA</state> <postcode>02111-1307</postcode>
|
||||
<country>USA</country>
|
||||
</address>
|
||||
</para>
|
||||
</appendix>
|
||||
|
||||
</book>
|
||||
28
doc/reference/cogl-gst/cogl-gst-sections.txt
Normal file
28
doc/reference/cogl-gst/cogl-gst-sections.txt
Normal file
@ -0,0 +1,28 @@
|
||||
<SECTION>
|
||||
<FILE>cogl-gst-video-sink</FILE>
|
||||
<TITLE>CoglGstVideoSink</TITLE>
|
||||
|
||||
<SUBSECTION>
|
||||
CoglGstVideoSink
|
||||
CoglGstVideoSinkClass
|
||||
cogl_gst_video_sink_new
|
||||
cogl_gst_video_sink_set_context
|
||||
cogl_gst_video_sink_get_pipeline
|
||||
cogl_gst_video_sink_attach_frame
|
||||
cogl_gst_video_sink_setup_pipeline
|
||||
cogl_gst_video_sink_get_free_layer
|
||||
cogl_gst_video_sink_set_first_layer
|
||||
cogl_gst_video_sink_set_default_sample
|
||||
|
||||
<SUBSECTION Standard>
|
||||
COGL_GST_IS_VIDEO_SINK
|
||||
COGL_GST_IS_VIDEO_SINK_CLASS
|
||||
COGL_GST_VIDEO_SINK
|
||||
COGL_GST_VIDEO_SINK_CLASS
|
||||
COGL_GST_TYPE_VIDEO_SINK
|
||||
COGL_GST_VIDEO_SINK_GET_CLASS
|
||||
<SUBSECTION Private>
|
||||
CoglGstVideoSinkPrivate
|
||||
cogl_gst_video_sink_get_type
|
||||
|
||||
</SECTION>
|
||||
2
doc/reference/cogl-gst/cogl-gst.types
Normal file
2
doc/reference/cogl-gst/cogl-gst.types
Normal file
@ -0,0 +1,2 @@
|
||||
#include <cogl-gst/cogl-gst.h>
|
||||
cogl_gst_video_sink_get_type
|
||||
Loading…
Reference in New Issue
Block a user