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259 lines
8 KiB
C
259 lines
8 KiB
C
/* GStreamer
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* Copyright (C) 2008 David Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef _GST_BASE_VIDEO_CODEC_H_
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#define _GST_BASE_VIDEO_CODEC_H_
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#ifndef GST_USE_UNSTABLE_API
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#warning "GstBaseVideoCodec is unstable API and may change in future."
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#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
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#endif
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include <gst/video/video.h>
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#include <gst/video/gstvideopool.h>
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#include <gst/video/gstvideometa.h>
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G_BEGIN_DECLS
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#define GST_TYPE_BASE_VIDEO_CODEC \
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(gst_base_video_codec_get_type())
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#define GST_BASE_VIDEO_CODEC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_VIDEO_CODEC,GstBaseVideoCodec))
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#define GST_BASE_VIDEO_CODEC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_VIDEO_CODEC,GstBaseVideoCodecClass))
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#define GST_BASE_VIDEO_CODEC_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_BASE_VIDEO_CODEC,GstBaseVideoCodecClass))
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#define GST_IS_BASE_VIDEO_CODEC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_VIDEO_CODEC))
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#define GST_IS_BASE_VIDEO_CODEC_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_VIDEO_CODEC))
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/**
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* GST_BASE_VIDEO_CODEC_SINK_NAME:
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*
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* The name of the templates for the sink pad.
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*/
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#define GST_BASE_VIDEO_CODEC_SINK_NAME "sink"
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/**
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* GST_BASE_VIDEO_CODEC_SRC_NAME:
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*
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* The name of the templates for the source pad.
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*/
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#define GST_BASE_VIDEO_CODEC_SRC_NAME "src"
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/**
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* GST_BASE_VIDEO_CODEC_SRC_PAD:
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* @obj: base video codec instance
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*
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* Gives the pointer to the source #GstPad object of the element.
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*/
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#define GST_BASE_VIDEO_CODEC_SRC_PAD(obj) (((GstBaseVideoCodec *) (obj))->srcpad)
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/**
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* GST_BASE_VIDEO_CODEC_SINK_PAD:
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* @obj: base video codec instance
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*
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* Gives the pointer to the sink #GstPad object of the element.
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*/
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#define GST_BASE_VIDEO_CODEC_SINK_PAD(obj) (((GstBaseVideoCodec *) (obj))->sinkpad)
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/**
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* GST_BASE_VIDEO_CODEC_FLOW_NEED_DATA:
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*
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*/
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#define GST_BASE_VIDEO_CODEC_FLOW_NEED_DATA GST_FLOW_CUSTOM_SUCCESS
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#define GST_BASE_VIDEO_CODEC_STREAM_LOCK(codec) g_rec_mutex_lock (&GST_BASE_VIDEO_CODEC (codec)->stream_lock)
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#define GST_BASE_VIDEO_CODEC_STREAM_UNLOCK(codec) g_rec_mutex_unlock (&GST_BASE_VIDEO_CODEC (codec)->stream_lock)
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typedef struct _GstVideoState GstVideoState;
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typedef struct _GstVideoFrameState GstVideoFrameState;
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typedef struct _GstBaseVideoCodec GstBaseVideoCodec;
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typedef struct _GstBaseVideoCodecClass GstBaseVideoCodecClass;
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/* GstVideoState is only used on the compressed video pad */
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/**
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* GstVideoState:
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* @width: Width in pixels (including borders)
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* @height: Height in pixels (including borders)
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* @fps_n: Numerator of framerate
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* @fps_d: Denominator of framerate
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* @par_n: Numerator of Pixel Aspect Ratio
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* @par_d: Denominator of Pixel Aspect Ratio
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* @have_interlaced: The content of the @interlaced field is present and valid
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* @interlaced: %TRUE if the stream is interlaced
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* @top_field_first: %TRUE if the interlaced frame is top-field-first
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* @clean_width: Useful width of video in pixels (i.e. without borders)
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* @clean_height: Useful height of video in pixels (i.e. without borders)
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* @clean_offset_left: Horizontal offset (from the left) of useful region in pixels
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* @clean_offset_top: Vertical offset (from the top) of useful region in pixels
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* @bytes_per_picture: Size in bytes of each picture
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* @codec_data: Optional Codec Data for the stream
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*
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* Information about compressed video stream.
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* FIXME: Re-use GstVideoInfo for more fields.
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*/
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struct _GstVideoState
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{
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GstCaps *caps;
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GstVideoFormat format;
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int width, height;
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int fps_n, fps_d;
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int par_n, par_d;
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gboolean have_interlaced;
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gboolean interlaced;
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gboolean top_field_first;
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int clean_width, clean_height;
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int clean_offset_left, clean_offset_top;
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int bytes_per_picture;
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GstBuffer *codec_data;
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};
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/**
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* GstVideoFrameState:
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* @decode_timestamp: Decoding timestamp (aka DTS)
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* @presentation_timestamp: Presentation timestamp (aka PTS)
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* @presentation_duration: Duration of frame
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* @system_frame_number: unique ID attributed when #GstVideoFrameState is
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* created
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* @decode_frame_number: Decoded frame number, increases in decoding order
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* @presentation_frame_number: Presentation frame number, increases in
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* presentation order.
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* @distance_from_sync: Distance of the frame from a sync point, in number
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* of frames.
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* @is_sync_point: #TRUE if the frame is a synchronization point (like a
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* keyframe)
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* @is_eos: #TRUE if the frame is the last one of a segment.
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* @decode_only: If #TRUE, the frame is only meant to be decoded but not
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* pushed downstream
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* @sink_buffer: input buffer
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* @src_buffer: output buffer
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* @field_index: Number of fields since beginning of stream
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* @n_fields: Number of fields present in frame (default 2)
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* @coder_hook: Private data called with @coder_hook_destroy_notify
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* @coder_hook_destroy_notify: Called when frame is destroyed
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* @deadline: Target clock time for display (running time)
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* @force_keyframe: For encoders, if #TRUE a keyframe must be generated
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* @force_keyframe_headers: For encoders, if #TRUE new headers must be generated
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* @events: List of #GstEvent that must be pushed before the next @src_buffer
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*
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* State of a video frame going through the codec
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**/
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struct _GstVideoFrameState
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{
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/*< private >*/
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gint ref_count;
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/*< public >*/
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GstClockTime decode_timestamp;
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GstClockTime presentation_timestamp;
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GstClockTime presentation_duration;
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gint system_frame_number;
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gint decode_frame_number;
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gint presentation_frame_number;
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int distance_from_sync;
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gboolean is_sync_point;
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gboolean is_eos;
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/* Frames that should not be pushed downstream and are
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* not meant for display */
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gboolean decode_only;
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GstBuffer *sink_buffer;
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GstBuffer *src_buffer;
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int field_index;
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int n_fields;
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void *coder_hook;
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GDestroyNotify coder_hook_destroy_notify;
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GstClockTime deadline;
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gboolean force_keyframe;
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gboolean force_keyframe_headers;
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/* Events that should be pushed downstream *before*
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* the next src_buffer */
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GList *events;
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};
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struct _GstBaseVideoCodec
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{
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GstElement element;
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/*< private >*/
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GstPad *sinkpad;
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GstPad *srcpad;
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/* protects all data processing, i.e. is locked
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* in the chain function, finish_frame and when
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* processing serialized events */
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GRecMutex stream_lock;
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guint64 system_frame_number;
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GList *frames; /* Protected with OBJECT_LOCK */
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GstVideoState state; /* Compressed video pad */
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GstVideoInfo info; /* Raw video pad */
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GstSegment segment;
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gdouble proportion;
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GstClockTime earliest_time;
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gboolean discont;
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gint64 bytes;
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gint64 time;
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/* FIXME before moving to base */
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void *padding[GST_PADDING_LARGE];
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};
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struct _GstBaseVideoCodecClass
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{
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GstElementClass element_class;
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/* FIXME before moving to base */
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void *padding[GST_PADDING_LARGE];
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};
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GType gst_video_frame_state_get_type (void);
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GType gst_base_video_codec_get_type (void);
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void gst_base_video_codec_append_frame (GstBaseVideoCodec *codec, GstVideoFrameState *frame);
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void gst_base_video_codec_remove_frame (GstBaseVideoCodec *codec, GstVideoFrameState *frame);
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GstVideoFrameState * gst_base_video_codec_new_frame (GstBaseVideoCodec *base_video_codec);
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GstVideoFrameState * gst_video_frame_state_ref (GstVideoFrameState * frame);
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void gst_video_frame_state_unref (GstVideoFrameState * frame);
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G_END_DECLS
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#endif
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