/* GStreamer * Copyright (C) 2008 David Schleef * Copyright (C) 2011 Mark Nauwelaerts . * Copyright (C) 2011 Nokia Corporation. All rights reserved. * Contact: Stefan Kost * * 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 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: * * The opaque #GstBaseVideoEncoder data structure. */ struct _GstBaseVideoEncoder { /*< private >*/ 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. * GstVideoState fields have already been * set according to provided caps. * @handle_frame: Provides input frame to subclass. * @reset: Optional. * Allows subclass (codec) to perform post-seek semantics reset. * @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 { /*< private >*/ GstBaseVideoCodecClass base_video_codec_class; /*< public >*/ /* virtual methods for subclasses */ gboolean (*start) (GstBaseVideoEncoder *coder); gboolean (*stop) (GstBaseVideoEncoder *coder); gboolean (*set_format) (GstBaseVideoEncoder *coder, GstVideoState *state); GstFlowReturn (*handle_frame) (GstBaseVideoEncoder *coder, GstVideoFrame *frame); gboolean (*reset) (GstBaseVideoEncoder *coder); GstFlowReturn (*finish) (GstBaseVideoEncoder *coder); GstFlowReturn (*shape_output) (GstBaseVideoEncoder *coder, GstVideoFrame *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 *base_video_encoder); GstVideoFrame* gst_base_video_encoder_get_oldest_frame (GstBaseVideoEncoder *base_video_encoder); GstFlowReturn gst_base_video_encoder_finish_frame (GstBaseVideoEncoder *base_video_encoder, GstVideoFrame *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