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304 lines
11 KiB
C
304 lines
11 KiB
C
/* GStreamer
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* Copyright (C) 2008 David Schleef <ds@schleef.org>
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* Copyright (C) 2011 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>.
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* Copyright (C) 2011 Nokia Corporation. All rights reserved.
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* Contact: Stefan Kost <stefan.kost@nokia.com>
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* Copyright (C) 2012 Collabora Ltd.
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* Author : Edward Hervey <edward@collabora.com>
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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_VIDEO_ENCODER_H_
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#define _GST_VIDEO_ENCODER_H_
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#include <gst/video/gstvideoutils.h>
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G_BEGIN_DECLS
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#define GST_TYPE_VIDEO_ENCODER \
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(gst_video_encoder_get_type())
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#define GST_VIDEO_ENCODER(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_ENCODER,GstVideoEncoder))
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#define GST_VIDEO_ENCODER_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_ENCODER,GstVideoEncoderClass))
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#define GST_VIDEO_ENCODER_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_VIDEO_ENCODER,GstVideoEncoderClass))
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#define GST_IS_VIDEO_ENCODER(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_ENCODER))
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#define GST_IS_VIDEO_ENCODER_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_ENCODER))
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#define GST_VIDEO_ENCODER_CAST(enc) ((GstVideoEncoder*)enc)
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/**
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* GST_VIDEO_ENCODER_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_VIDEO_ENCODER_SINK_NAME "sink"
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/**
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* GST_VIDEO_ENCODER_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_VIDEO_ENCODER_SRC_NAME "src"
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/**
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* GST_VIDEO_ENCODER_SRC_PAD:
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* @obj: a #GstVideoEncoder
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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_VIDEO_ENCODER_SRC_PAD(obj) (((GstVideoEncoder *) (obj))->srcpad)
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/**
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* GST_VIDEO_ENCODER_SINK_PAD:
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* @obj: a #GstVideoEncoder
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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_VIDEO_ENCODER_SINK_PAD(obj) (((GstVideoEncoder *) (obj))->sinkpad)
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/**
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* GST_VIDEO_ENCODER_FLOW_NEED_DATA:
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*
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* Returned while parsing to indicate more data is needed.
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**/
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#define GST_VIDEO_ENCODER_FLOW_NEED_DATA GST_FLOW_CUSTOM_SUCCESS
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/**
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* GST_VIDEO_ENCODER_FLOW_DROPPED:
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*
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* Returned when the event/buffer should be dropped.
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*/
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#define GST_VIDEO_ENCODER_FLOW_DROPPED GST_FLOW_CUSTOM_SUCCESS_1
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/**
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* GST_VIDEO_ENCODER_INPUT_SEGMENT:
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* @obj: base parse instance
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*
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* Gives the segment of the element.
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*/
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#define GST_VIDEO_ENCODER_INPUT_SEGMENT(obj) (GST_VIDEO_ENCODER_CAST (obj)->input_segment)
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/**
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* GST_VIDEO_ENCODER_OUTPUT_SEGMENT:
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* @obj: base parse instance
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*
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* Gives the segment of the element.
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*/
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#define GST_VIDEO_ENCODER_OUTPUT_SEGMENT(obj) (GST_VIDEO_ENCODER_CAST (obj)->output_segment)
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/**
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* GST_VIDEO_ENCODER_STREAM_LOCK:
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* @encoder: video encoder instance
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*
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* Obtain a lock to protect the encoder function from concurrent access.
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*/
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#define GST_VIDEO_ENCODER_STREAM_LOCK(encoder) g_rec_mutex_lock (&GST_VIDEO_ENCODER (encoder)->stream_lock)
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/**
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* GST_VIDEO_ENCODER_STREAM_UNLOCK:
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* @encoder: video encoder instance
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*
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* Release the lock that protects the encoder function from concurrent access.
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*/
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#define GST_VIDEO_ENCODER_STREAM_UNLOCK(encoder) g_rec_mutex_unlock (&GST_VIDEO_ENCODER (encoder)->stream_lock)
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typedef struct _GstVideoEncoder GstVideoEncoder;
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typedef struct _GstVideoEncoderPrivate GstVideoEncoderPrivate;
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typedef struct _GstVideoEncoderClass GstVideoEncoderClass;
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/**
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* GstVideoEncoder:
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*
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* The opaque #GstVideoEncoder data structure.
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*/
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struct _GstVideoEncoder
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{
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/*< private >*/
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GstElement element;
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/*< protected >*/
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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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/* MT-protected (with STREAM_LOCK) */
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GstSegment input_segment;
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GstSegment output_segment;
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GstVideoEncoderPrivate *priv;
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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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/**
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* GstVideoEncoderClass:
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* @open: Optional.
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* Called when the element changes to GST_STATE_READY.
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* Allows opening external resources.
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* @close: Optional.
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* Called when the element changes to GST_STATE_NULL.
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* Allows closing external resources.
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* @start: Optional.
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* Called when the element starts processing.
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* Allows opening external resources.
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* @stop: Optional.
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* Called when the element stops processing.
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* Allows closing external resources.
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* @set_format: Optional.
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* Notifies subclass of incoming data format.
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* GstVideoCodecState fields have already been
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* set according to provided caps.
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* @handle_frame: Provides input frame to subclass.
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* @reset: Optional.
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* Allows subclass (encoder) to perform post-seek semantics reset.
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* @finish: Optional.
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* Called to request subclass to dispatch any pending remaining
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* data (e.g. at EOS).
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* @pre_push: Optional.
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* Allows subclass to push frame downstream in whatever
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* shape or form it deems appropriate. If not provided,
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* provided encoded frame data is simply pushed downstream.
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* @getcaps: Optional.
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* Allows for a custom sink getcaps implementation (e.g.
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* for multichannel input specification). If not implemented,
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* default returns gst_video_encoder_proxy_getcaps
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* applied to sink template caps.
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* @sink_event: Optional.
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* Event handler on the sink pad. This function should return
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* TRUE if the event was handled and should be discarded
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* (i.e. not unref'ed).
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* @src_event: Optional.
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* Event handler on the source pad. This function should return
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* TRUE if the event was handled and should be discarded
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* (i.e. not unref'ed).
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* @negotiate: Optional.
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* Negotiate with downstream and configure buffer pools, etc.
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* @decide_allocation: Optional.
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* Setup the allocation parameters for allocating output
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* buffers. The passed in query contains the result of the
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* downstream allocation query.
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* @propose_allocation: Optional.
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* Propose buffer allocation parameters for upstream elements.
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*
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* Subclasses can override any of the available virtual methods or not, as
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* needed. At minimum @handle_frame needs to be overridden, and @set_format
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* and @get_caps are likely needed as well.
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*/
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struct _GstVideoEncoderClass
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{
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/*< private >*/
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GstElementClass element_class;
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/*< public >*/
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/* virtual methods for subclasses */
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gboolean (*open) (GstVideoEncoder *encoder);
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gboolean (*close) (GstVideoEncoder *encoder);
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gboolean (*start) (GstVideoEncoder *encoder);
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gboolean (*stop) (GstVideoEncoder *encoder);
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gboolean (*set_format) (GstVideoEncoder *encoder,
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GstVideoCodecState *state);
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GstFlowReturn (*handle_frame) (GstVideoEncoder *encoder,
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GstVideoCodecFrame *frame);
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gboolean (*reset) (GstVideoEncoder *encoder,
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gboolean hard);
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GstFlowReturn (*finish) (GstVideoEncoder *encoder);
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GstFlowReturn (*pre_push) (GstVideoEncoder *encoder,
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GstVideoCodecFrame *frame);
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GstCaps * (*getcaps) (GstVideoEncoder *enc,
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GstCaps *filter);
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gboolean (*sink_event) (GstVideoEncoder *encoder,
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GstEvent *event);
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gboolean (*src_event) (GstVideoEncoder *encoder,
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GstEvent *event);
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gboolean (*negotiate) (GstVideoEncoder *encoder);
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gboolean (*decide_allocation) (GstVideoEncoder *encoder, GstQuery *query);
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gboolean (*propose_allocation) (GstVideoEncoder * encoder,
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GstQuery * query);
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/*< private >*/
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/* FIXME before moving to base */
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gpointer _gst_reserved[GST_PADDING_LARGE];
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};
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GType gst_video_encoder_get_type (void);
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GstVideoCodecState* gst_video_encoder_get_output_state (GstVideoEncoder *encoder);
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GstVideoCodecState* gst_video_encoder_set_output_state (GstVideoEncoder * encoder,
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GstCaps * caps,
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GstVideoCodecState * reference);
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gboolean gst_video_encoder_negotiate (GstVideoEncoder * encoder);
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GstVideoCodecFrame* gst_video_encoder_get_frame (GstVideoEncoder *encoder,
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int frame_number);
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GstVideoCodecFrame* gst_video_encoder_get_oldest_frame (GstVideoEncoder *encoder);
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GstBuffer * gst_video_encoder_allocate_output_buffer (GstVideoEncoder * encoder,
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gsize size);
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GstFlowReturn gst_video_encoder_allocate_output_frame (GstVideoEncoder *encoder,
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GstVideoCodecFrame *frame,
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gsize size);
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GstFlowReturn gst_video_encoder_finish_frame (GstVideoEncoder *encoder,
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GstVideoCodecFrame *frame);
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GstCaps * gst_video_encoder_proxy_getcaps (GstVideoEncoder * enc,
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GstCaps * caps,
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GstCaps * filter);
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void gst_video_encoder_set_discont (GstVideoEncoder *encoder);
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gboolean gst_video_encoder_get_discont (GstVideoEncoder *encoder);
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void gst_video_encoder_set_latency (GstVideoEncoder *encoder,
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GstClockTime min_latency,
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GstClockTime max_latency);
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void gst_video_encoder_get_latency (GstVideoEncoder *encoder,
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GstClockTime *min_latency,
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GstClockTime *max_latency);
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void gst_video_encoder_set_headers (GstVideoEncoder *encoder,
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GList *headers);
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void gst_video_encoder_merge_tags (GstVideoEncoder *encoder,
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const GstTagList *tags,
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GstTagMergeMode mode);
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G_END_DECLS
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#endif
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