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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>gstvideoutils: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
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<link rel="up" href="gstreamer-video.html" title="Video Library">
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<link rel="prev" href="gst-plugins-base-libs-GstVideoPool.html" title="GstVideoBufferPool">
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<link rel="next" href="GstNavigation.html" title="GstNavigation">
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<meta name="generator" content="GTK-Doc V1.27 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Description
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gstvideoutils
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gstvideoutils
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Functions
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#define
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GST_VIDEO_CODEC_FRAME_FLAGS()
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#define
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GST_VIDEO_CODEC_FRAME_FLAG_IS_SET()
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#define
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GST_VIDEO_CODEC_FRAME_FLAG_SET()
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#define
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GST_VIDEO_CODEC_FRAME_FLAG_UNSET()
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#define
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GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY()
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#define
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GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME()
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#define
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GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME_HEADERS()
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#define
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GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT()
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#define
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GST_VIDEO_CODEC_FRAME_SET_DECODE_ONLY()
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#define
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GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME()
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#define
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GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS()
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#define
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GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT()
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#define
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GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME()
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#define
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GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME_HEADERS()
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#define
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GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT()
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GstVideoCodecFrame *
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gst_video_codec_frame_ref ()
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void
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gst_video_codec_frame_unref ()
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void
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gst_video_codec_frame_set_user_data ()
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gpointer
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gst_video_codec_frame_get_user_data ()
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GstVideoCodecState *
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gst_video_codec_state_ref ()
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void
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gst_video_codec_state_unref ()
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Types and Values
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struct
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GstVideoCodecFrame
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enum
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GstVideoCodecFrameFlags
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struct
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GstVideoCodecState
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Includes
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#include <gst/video/video-scaler.h>
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Description
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Functions
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GST_VIDEO_CODEC_FRAME_FLAGS()
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#define GST_VIDEO_CODEC_FRAME_FLAGS(frame) ((frame)->flags)
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The entire set of flags for the frame
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Parameters
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frame
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a GstVideoCodecFrame
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GST_VIDEO_CODEC_FRAME_FLAG_IS_SET()
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#define GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame,flag) !!(GST_VIDEO_CODEC_FRAME_FLAGS(frame) & (flag))
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Checks whether the given flag
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is set
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Parameters
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frame
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a GstVideoCodecFrame
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flag
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a flag to check for
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GST_VIDEO_CODEC_FRAME_FLAG_SET()
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#define GST_VIDEO_CODEC_FRAME_FLAG_SET(frame,flag) (GST_VIDEO_CODEC_FRAME_FLAGS(frame) |= (flag))
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This macro sets the given bits
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Parameters
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frame
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a GstVideoCodecFrame
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flag
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Flag to set, can be any number of bits in guint32.
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GST_VIDEO_CODEC_FRAME_FLAG_UNSET()
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#define GST_VIDEO_CODEC_FRAME_FLAG_UNSET(frame,flag) (GST_VIDEO_CODEC_FRAME_FLAGS(frame) &= ~(flag))
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This macro usets the given bits.
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Parameters
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frame
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a GstVideoCodecFrame
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flag
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Flag to unset
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GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY()
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#define GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY(frame) (GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY))
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Tests if the buffer should only be decoded but not sent downstream.
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Parameters
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frame
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a GstVideoCodecFrame
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GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME()
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#define GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME(frame) (GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME))
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Tests if the frame must be encoded as a keyframe. Applies only to
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frames provided to encoders. Decoders can safely ignore this field.
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Parameters
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frame
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a GstVideoCodecFrame
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GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME_HEADERS()
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#define GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME_HEADERS(frame) (GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS))
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Tests if encoder should output stream headers before outputting the
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resulting encoded buffer for the given frame.
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Applies only to frames provided to encoders. Decoders can safely
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ignore this field.
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Parameters
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frame
|
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a GstVideoCodecFrame
|
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GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT()
|
|
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#define GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT(frame) (GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT))
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Tests if the frame is a synchronization point (like a keyframe).
|
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Decoder implementations can use this to detect keyframes.
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Parameters
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frame
|
|
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a GstVideoCodecFrame
|
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GST_VIDEO_CODEC_FRAME_SET_DECODE_ONLY()
|
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#define GST_VIDEO_CODEC_FRAME_SET_DECODE_ONLY(frame) (GST_VIDEO_CODEC_FRAME_FLAG_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY))
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Sets the buffer to not be sent downstream.
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Decoder implementation can use this if they have frames that
|
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are not meant to be displayed.
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Encoder implementation can safely ignore this field.
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Parameters
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frame
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a GstVideoCodecFrame
|
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GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME()
|
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#define GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME(frame) (GST_VIDEO_CODEC_FRAME_FLAG_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME))
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GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS()
|
|
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#define GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS(frame) (GST_VIDEO_CODEC_FRAME_FLAG_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS))
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GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT()
|
|
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#define GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT(frame) (GST_VIDEO_CODEC_FRAME_FLAG_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT))
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Sets the frame to be a synchronization point (like a keyframe).
|
|
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Encoder implementations should set this accordingly.
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Decoder implementing parsing features should set this when they
|
|
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detect such a synchronization point.
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Parameters
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frame
|
|
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a GstVideoCodecFrame
|
|
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GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME()
|
|
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#define GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME(frame) (GST_VIDEO_CODEC_FRAME_FLAG_UNSET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME))
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GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME_HEADERS()
|
|
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#define GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME_HEADERS(frame) (GST_VIDEO_CODEC_FRAME_FLAG_UNSET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS))
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GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT()
|
|
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#define GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT(frame) (GST_VIDEO_CODEC_FRAME_FLAG_UNSET(frame, GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT))
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gst_video_codec_frame_ref ()
|
|
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GstVideoCodecFrame *
|
|
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gst_video_codec_frame_ref (GstVideoCodecFrame *frame);
|
|
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Increases the refcount of the given frame by one.
|
|
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Parameters
|
|
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|
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frame
|
|
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a GstVideoCodecFrame
|
|
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Returns
|
|
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buf
|
|
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|
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gst_video_codec_frame_unref ()
|
|
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void
|
|
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gst_video_codec_frame_unref (GstVideoCodecFrame *frame);
|
|
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971217 |
Decreases the refcount of the frame. If the refcount reaches 0, the frame
|
|
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971217 |
will be freed.
|
|
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|
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Parameters
|
|
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|
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|
|
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frame
|
|
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a GstVideoCodecFrame
|
|
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|
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gst_video_codec_frame_set_user_data ()
|
|
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void
|
|
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gst_video_codec_frame_set_user_data (GstVideoCodecFrame *frame,
|
|
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971217 |
gpointer user_data,
|
|
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971217 |
GDestroyNotify notify);
|
|
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971217 |
Sets user_data
|
|
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971217 |
on the frame and the GDestroyNotify that will be called when
|
|
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the frame is freed. Allows to attach private data by the subclass to frames.
|
|
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If a user_data
|
|
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was previously set, then the previous set notify
|
|
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will be called
|
|
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before the user_data
|
|
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is replaced.
|
|
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Parameters
|
|
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|
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|
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frame
|
|
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a GstVideoCodecFrame
|
|
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user_data
|
|
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private data
|
|
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|
|
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|
|
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notify
|
|
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971217 |
a GDestroyNotify.
|
|
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971217 |
[closure user_data]
|
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gst_video_codec_frame_get_user_data ()
|
|
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gpointer
|
|
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971217 |
gst_video_codec_frame_get_user_data (GstVideoCodecFrame *frame);
|
|
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971217 |
Gets private data set on the frame by the subclass via
|
|
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gst_video_codec_frame_set_user_data() previously.
|
|
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|
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Parameters
|
|
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|
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frame
|
|
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a GstVideoCodecFrame
|
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|
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Returns
|
|
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The previously set user_data.
|
|
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[transfer none]
|
|
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gst_video_codec_state_ref ()
|
|
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GstVideoCodecState *
|
|
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gst_video_codec_state_ref (GstVideoCodecState *state);
|
|
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971217 |
Increases the refcount of the given state by one.
|
|
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971217 |
|
|
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Parameters
|
|
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|
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state
|
|
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a GstVideoCodecState
|
|
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|
|
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|
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Returns
|
|
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971217 |
buf
|
|
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|
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|
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|
|
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gst_video_codec_state_unref ()
|
|
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971217 |
void
|
|
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971217 |
gst_video_codec_state_unref (GstVideoCodecState *state);
|
|
Packit |
971217 |
Decreases the refcount of the state. If the refcount reaches 0, the state
|
|
Packit |
971217 |
will be freed.
|
|
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971217 |
|
|
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Parameters
|
|
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971217 |
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|
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|
|
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state
|
|
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971217 |
a GstVideoCodecState
|
|
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|
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|
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Types and Values
|
|
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|
|
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971217 |
struct GstVideoCodecFrame
|
|
Packit |
971217 |
struct GstVideoCodecFrame {
|
|
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971217 |
guint32 system_frame_number; /* ED */
|
|
Packit |
971217 |
guint32 decode_frame_number; /* ED */
|
|
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971217 |
guint32 presentation_frame_number; /* ED */
|
|
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971217 |
|
|
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971217 |
GstClockTime dts; /* ED */
|
|
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971217 |
GstClockTime pts; /* ED */
|
|
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971217 |
GstClockTime duration; /* ED */
|
|
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971217 |
|
|
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971217 |
int distance_from_sync; /* ED */
|
|
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971217 |
|
|
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971217 |
GstBuffer *input_buffer; /* ED */
|
|
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971217 |
GstBuffer *output_buffer; /* ED */
|
|
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971217 |
|
|
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971217 |
GstClockTime deadline; /* D */
|
|
Packit |
971217 |
};
|
|
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971217 |
|
|
Packit |
971217 |
A GstVideoCodecFrame represents a video frame both in raw and
|
|
Packit |
971217 |
encoded form.
|
|
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971217 |
|
|
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971217 |
Members
|
|
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971217 |
|
|
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971217 |
|
|
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|
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|
|
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|
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|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
guint32 system_frame_number;
|
|
Packit |
971217 |
Unique identifier for the frame. Use this if you need
|
|
Packit |
971217 |
to get hold of the frame later (like when data is being decoded).
|
|
Packit |
971217 |
Typical usage in decoders is to set this on the opaque value provided
|
|
Packit |
971217 |
to the library and get back the frame using gst_video_decoder_get_frame()
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
guint32 decode_frame_number;
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
guint32 presentation_frame_number;
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
GstClockTime dts;
|
|
Packit |
971217 |
Decoding timestamp
|
|
Packit |
971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
GstClockTime pts;
|
|
Packit |
971217 |
Presentation timestamp
|
|
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971217 |
|
|
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971217 |
|
|
Packit |
971217 |
|
|
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971217 |
GstClockTime duration;
|
|
Packit |
971217 |
Duration of the frame
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
int distance_from_sync;
|
|
Packit |
971217 |
Distance in frames from the last synchronization point.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstBuffer *input_buffer;
|
|
Packit |
971217 |
the input GstBuffer that created this frame. The buffer is owned
|
|
Packit |
971217 |
by the frame and references to the frame instead of the buffer should
|
|
Packit |
971217 |
be kept.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstBuffer *output_buffer;
|
|
Packit |
971217 |
the output GstBuffer. Implementations should set this either
|
|
Packit |
971217 |
directly, or by using the
|
|
Packit |
971217 |
gst_video_decoder_allocate_output_frame()
|
|
Packit |
971217 |
or
|
|
Packit |
971217 |
gst_video_decoder_allocate_output_buffer()
|
|
Packit |
971217 |
methods. The buffer is
|
|
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owned by the frame and references to the frame instead of the
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buffer should be kept.
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GstClockTime deadline;
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Running time when the frame will be used.
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enum GstVideoCodecFrameFlags
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Flags for GstVideoCodecFrame
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Members
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GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY
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is the frame only meant to be decoded
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GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT
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is the frame a synchronization point (keyframe)
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GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME
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should the output frame be made a keyframe
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GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS
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should the encoder output stream headers
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struct GstVideoCodecState
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struct GstVideoCodecState {
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GstVideoInfo info;
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GstCaps *caps;
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GstBuffer *codec_data;
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GstCaps *allocation_caps;
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};
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Structure representing the state of an incoming or outgoing video
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stream for encoders and decoders.
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Decoders and encoders will receive such a state through their
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respective set_format
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vmethods.
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Decoders and encoders can set the downstream state, by using the
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gst_video_decoder_set_output_state()
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or
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gst_video_encoder_set_output_state()
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methods.
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Members
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GstVideoInfo info;
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The GstVideoInfo describing the stream
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GstCaps *caps;
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The GstCaps used in the caps negotiation of the pad.
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GstBuffer *codec_data;
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a GstBuffer corresponding to the
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'codec_data' field of a stream, or NULL.
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GstCaps *allocation_caps;
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The GstCaps for allocation query and pool
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negotiation. Since: 1.10
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Generated by GTK-Doc V1.27
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