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/* GStreamer
* Copyright (C) 2008 David Schleef <ds@schleef.org>
* Copyright (C) 2011 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>.
* Copyright (C) 2011 Nokia Corporation. All rights reserved.
* Contact: Stefan Kost <stefan.kost@nokia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _GST_BASE_VIDEO_ENCODER_H_
#define _GST_BASE_VIDEO_ENCODER_H_
#ifndef GST_USE_UNSTABLE_API
#warning "GstBaseVideoEncoder is unstable API and may change in future."
#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
#endif
#include <gst/video/gstbasevideocodec.h>
G_BEGIN_DECLS
#define GST_TYPE_BASE_VIDEO_ENCODER \
(gst_base_video_encoder_get_type())
#define GST_BASE_VIDEO_ENCODER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_VIDEO_ENCODER,GstBaseVideoEncoder))
#define GST_BASE_VIDEO_ENCODER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_VIDEO_ENCODER,GstBaseVideoEncoderClass))
#define GST_BASE_VIDEO_ENCODER_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_BASE_VIDEO_ENCODER,GstBaseVideoEncoderClass))
#define GST_IS_BASE_VIDEO_ENCODER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_VIDEO_ENCODER))
#define GST_IS_BASE_VIDEO_ENCODER_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_VIDEO_ENCODER))
/**
* GST_BASE_VIDEO_ENCODER_SINK_NAME:
*
* The name of the templates for the sink pad.
*/
#define GST_BASE_VIDEO_ENCODER_SINK_NAME "sink"
/**
* GST_BASE_VIDEO_ENCODER_SRC_NAME:
*
* The name of the templates for the source pad.
*/
#define GST_BASE_VIDEO_ENCODER_SRC_NAME "src"
/**
* GST_BASE_VIDEO_ENCODER_FLOW_DROPPED:
*
* Returned when the event/buffer should be dropped.
*/
#define GST_BASE_VIDEO_ENCODER_FLOW_DROPPED GST_FLOW_CUSTOM_SUCCESS_1
typedef struct _GstBaseVideoEncoder GstBaseVideoEncoder;
typedef struct _GstBaseVideoEncoderClass GstBaseVideoEncoderClass;
/**
* GstBaseVideoEncoder:
* @element: the parent element.
*
* The opaque #GstBaseVideoEncoder data structure.
*/
struct _GstBaseVideoEncoder
{
GstBaseVideoCodec base_video_codec;
/*< protected >*/
gboolean sink_clipping;
guint64 presentation_frame_number;
int distance_from_sync;
/*< private >*/
/* FIXME move to real private part ?
* (and introduce a context ?) */
gboolean drained;
gboolean at_eos;
gint64 min_latency;
gint64 max_latency;
GList *current_frame_events;
GstBuffer *headers;
GList *force_key_unit; /* List of pending forced keyunits */
void *padding[GST_PADDING_LARGE];
};
/**
* GstBaseVideoEncoderClass:
* @start: Optional.
* Called when the element starts processing.
* Allows opening external resources.
* @stop: Optional.
* Called when the element stops processing.
* Allows closing external resources.
* @set_format: Optional.
* Notifies subclass of incoming data format.
* GstVideoInfo fields have already been
* set according to provided caps.
* @handle_frame: Provides input frame to subclass.
* @finish: Optional.
* Called to request subclass to dispatch any pending remaining
* data (e.g. at EOS).
* @shape_output: Optional.
* Allows subclass to push frame downstream in whatever
* shape or form it deems appropriate. If not provided,
* provided encoded frame data is simply pushed downstream.
* @event: Optional.
* Event handler on the sink pad. This function should return
* TRUE if the event was handled and should be discarded
* (i.e. not unref'ed).
*
* Subclasses can override any of the available virtual methods or not, as
* needed. At minimum @handle_frame needs to be overridden, and @set_format
* and @get_caps are likely needed as well.
*/
struct _GstBaseVideoEncoderClass
{
GstBaseVideoCodecClass base_video_codec_class;
/*< public >*/
/* virtual methods for subclasses */
gboolean (*start) (GstBaseVideoEncoder *coder);
gboolean (*stop) (GstBaseVideoEncoder *coder);
gboolean (*set_format) (GstBaseVideoEncoder *coder,
GstVideoInfo *info);
GstFlowReturn (*handle_frame) (GstBaseVideoEncoder *coder,
GstVideoFrameState *frame);
gboolean (*reset) (GstBaseVideoEncoder *coder);
GstFlowReturn (*finish) (GstBaseVideoEncoder *coder);
GstFlowReturn (*shape_output) (GstBaseVideoEncoder *coder,
GstVideoFrameState *frame);
gboolean (*event) (GstBaseVideoEncoder *coder,
GstEvent *event);
/*< private >*/
/* FIXME before moving to base */
gpointer _gst_reserved[GST_PADDING_LARGE];
};
GType gst_base_video_encoder_get_type (void);
const GstVideoState* gst_base_video_encoder_get_state (GstBaseVideoEncoder *coder);
GstVideoFrameState* gst_base_video_encoder_get_oldest_frame (GstBaseVideoEncoder *coder);
GstFlowReturn gst_base_video_encoder_finish_frame (GstBaseVideoEncoder *base_video_encoder,
GstVideoFrameState *frame);
void gst_base_video_encoder_set_latency (GstBaseVideoEncoder *base_video_encoder,
GstClockTime min_latency, GstClockTime max_latency);
void gst_base_video_encoder_set_latency_fields (GstBaseVideoEncoder *base_video_encoder,
int n_fields);
void gst_base_video_encoder_set_headers (GstBaseVideoEncoder *base_video_encoder,
GstBuffer *headers);
G_END_DECLS
#endif
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