/* GStreamer * Copyright (C) 2008 David Schleef * Copyright (C) 2011 Mark Nauwelaerts . * Copyright (C) 2011 Nokia Corporation. All rights reserved. * Contact: Stefan Kost * Copyright (C) 2012 Collabora Ltd. * Author : Edward Hervey * * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifndef _GST_VIDEO_ENCODER_H_ #define _GST_VIDEO_ENCODER_H_ #include G_BEGIN_DECLS #define GST_TYPE_VIDEO_ENCODER \ (gst_video_encoder_get_type()) #define GST_VIDEO_ENCODER(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_ENCODER,GstVideoEncoder)) #define GST_VIDEO_ENCODER_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_ENCODER,GstVideoEncoderClass)) #define GST_VIDEO_ENCODER_GET_CLASS(obj) \ (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_VIDEO_ENCODER,GstVideoEncoderClass)) #define GST_IS_VIDEO_ENCODER(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_ENCODER)) #define GST_IS_VIDEO_ENCODER_CLASS(obj) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_ENCODER)) #define GST_VIDEO_ENCODER_CAST(enc) ((GstVideoEncoder*)enc) /** * GST_VIDEO_ENCODER_SINK_NAME: * * The name of the templates for the sink pad. */ #define GST_VIDEO_ENCODER_SINK_NAME "sink" /** * GST_VIDEO_ENCODER_SRC_NAME: * * The name of the templates for the source pad. */ #define GST_VIDEO_ENCODER_SRC_NAME "src" /** * GST_VIDEO_ENCODER_SRC_PAD: * @obj: a #GstVideoEncoder * * Gives the pointer to the source #GstPad object of the element. */ #define GST_VIDEO_ENCODER_SRC_PAD(obj) (((GstVideoEncoder *) (obj))->srcpad) /** * GST_VIDEO_ENCODER_SINK_PAD: * @obj: a #GstVideoEncoder * * Gives the pointer to the sink #GstPad object of the element. */ #define GST_VIDEO_ENCODER_SINK_PAD(obj) (((GstVideoEncoder *) (obj))->sinkpad) /** * GST_VIDEO_ENCODER_FLOW_NEED_DATA: * * Returned while parsing to indicate more data is needed. **/ #define GST_VIDEO_ENCODER_FLOW_NEED_DATA GST_FLOW_CUSTOM_SUCCESS /** * GST_VIDEO_ENCODER_FLOW_DROPPED: * * Returned when the event/buffer should be dropped. */ #define GST_VIDEO_ENCODER_FLOW_DROPPED GST_FLOW_CUSTOM_SUCCESS_1 /** * GST_VIDEO_ENCODER_INPUT_SEGMENT: * @obj: base parse instance * * Gives the segment of the element. */ #define GST_VIDEO_ENCODER_INPUT_SEGMENT(obj) (GST_VIDEO_ENCODER_CAST (obj)->input_segment) /** * GST_VIDEO_ENCODER_OUTPUT_SEGMENT: * @obj: base parse instance * * Gives the segment of the element. */ #define GST_VIDEO_ENCODER_OUTPUT_SEGMENT(obj) (GST_VIDEO_ENCODER_CAST (obj)->output_segment) /** * GST_VIDEO_ENCODER_STREAM_LOCK: * @encoder: video encoder instance * * Obtain a lock to protect the encoder function from concurrent access. */ #define GST_VIDEO_ENCODER_STREAM_LOCK(encoder) g_rec_mutex_lock (&GST_VIDEO_ENCODER (encoder)->stream_lock) /** * GST_VIDEO_ENCODER_STREAM_UNLOCK: * @encoder: video encoder instance * * Release the lock that protects the encoder function from concurrent access. */ #define GST_VIDEO_ENCODER_STREAM_UNLOCK(encoder) g_rec_mutex_unlock (&GST_VIDEO_ENCODER (encoder)->stream_lock) typedef struct _GstVideoEncoder GstVideoEncoder; typedef struct _GstVideoEncoderPrivate GstVideoEncoderPrivate; typedef struct _GstVideoEncoderClass GstVideoEncoderClass; /** * GstVideoEncoder: * * The opaque #GstVideoEncoder data structure. */ struct _GstVideoEncoder { /*< private >*/ GstElement element; /*< protected >*/ GstPad *sinkpad; GstPad *srcpad; /* protects all data processing, i.e. is locked * in the chain function, finish_frame and when * processing serialized events */ GRecMutex stream_lock; /* MT-protected (with STREAM_LOCK) */ GstSegment input_segment; GstSegment output_segment; /*< private >*/ GstVideoEncoderPrivate *priv; void *padding[GST_PADDING_LARGE]; }; /** * GstVideoEncoderClass: * @open: Optional. * Called when the element changes to GST_STATE_READY. * Allows opening external resources. * @close: Optional. * Called when the element changes to GST_STATE_NULL. * Allows closing external resources. * @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. * GstVideoCodecState fields have already been * set according to provided caps. * @handle_frame: Provides input frame to subclass. * @reset: Optional. * Allows subclass (encoder) to perform post-seek semantics reset. * @finish: Optional. * Called to request subclass to dispatch any pending remaining * data (e.g. at EOS). * @pre_push: 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. * @getcaps: Optional. * Allows for a custom sink getcaps implementation (e.g. * for multichannel input specification). If not implemented, * default returns gst_video_encoder_proxy_getcaps * applied to sink template caps. * @sink_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 should chain up to the parent implementation to * invoke the default handler. * @src_event: Optional. * Event handler on the source pad. This function should return * TRUE if the event was handled and should be discarded * (i.e. not unref'ed). * Subclasses should chain up to the parent implementation to * invoke the default handler. * @negotiate: Optional. * Negotiate with downstream and configure buffer pools, etc. * Subclasses should chain up to the parent implementation to * invoke the default handler. * @decide_allocation: Optional. * Setup the allocation parameters for allocating output * buffers. The passed in query contains the result of the * downstream allocation query. * Subclasses should chain up to the parent implementation to * invoke the default handler. * @propose_allocation: Optional. * Propose buffer allocation parameters for upstream elements. * Subclasses should chain up to the parent implementation to * invoke the default handler. * * 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 _GstVideoEncoderClass { /*< private >*/ GstElementClass element_class; /*< public >*/ /* virtual methods for subclasses */ gboolean (*open) (GstVideoEncoder *encoder); gboolean (*close) (GstVideoEncoder *encoder); gboolean (*start) (GstVideoEncoder *encoder); gboolean (*stop) (GstVideoEncoder *encoder); gboolean (*set_format) (GstVideoEncoder *encoder, GstVideoCodecState *state); GstFlowReturn (*handle_frame) (GstVideoEncoder *encoder, GstVideoCodecFrame *frame); gboolean (*reset) (GstVideoEncoder *encoder, gboolean hard); GstFlowReturn (*finish) (GstVideoEncoder *encoder); GstFlowReturn (*pre_push) (GstVideoEncoder *encoder, GstVideoCodecFrame *frame); GstCaps * (*getcaps) (GstVideoEncoder *enc, GstCaps *filter); gboolean (*sink_event) (GstVideoEncoder *encoder, GstEvent *event); gboolean (*src_event) (GstVideoEncoder *encoder, GstEvent *event); gboolean (*negotiate) (GstVideoEncoder *encoder); gboolean (*decide_allocation) (GstVideoEncoder *encoder, GstQuery *query); gboolean (*propose_allocation) (GstVideoEncoder * encoder, GstQuery * query); /*< private >*/ gpointer _gst_reserved[GST_PADDING_LARGE]; }; GType gst_video_encoder_get_type (void); GstVideoCodecState* gst_video_encoder_get_output_state (GstVideoEncoder *encoder); GstVideoCodecState* gst_video_encoder_set_output_state (GstVideoEncoder * encoder, GstCaps * caps, GstVideoCodecState * reference); gboolean gst_video_encoder_negotiate (GstVideoEncoder * encoder); GstVideoCodecFrame* gst_video_encoder_get_frame (GstVideoEncoder *encoder, int frame_number); GstVideoCodecFrame* gst_video_encoder_get_oldest_frame (GstVideoEncoder *encoder); GList * gst_video_encoder_get_frames (GstVideoEncoder *encoder); GstBuffer * gst_video_encoder_allocate_output_buffer (GstVideoEncoder * encoder, gsize size); GstFlowReturn gst_video_encoder_allocate_output_frame (GstVideoEncoder *encoder, GstVideoCodecFrame *frame, gsize size); GstFlowReturn gst_video_encoder_finish_frame (GstVideoEncoder *encoder, GstVideoCodecFrame *frame); GstCaps * gst_video_encoder_proxy_getcaps (GstVideoEncoder * enc, GstCaps * caps, GstCaps * filter); void gst_video_encoder_set_discont (GstVideoEncoder *encoder); gboolean gst_video_encoder_get_discont (GstVideoEncoder *encoder); void gst_video_encoder_set_latency (GstVideoEncoder *encoder, GstClockTime min_latency, GstClockTime max_latency); void gst_video_encoder_get_latency (GstVideoEncoder *encoder, GstClockTime *min_latency, GstClockTime *max_latency); void gst_video_encoder_set_headers (GstVideoEncoder *encoder, GList *headers); void gst_video_encoder_merge_tags (GstVideoEncoder *encoder, const GstTagList *tags, GstTagMergeMode mode); void gst_video_encoder_get_allocator (GstVideoEncoder *encoder, GstAllocator **allocator, GstAllocationParams *params); G_END_DECLS #endif