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7c557c2d65
boolean return value is not sufficient for representing the reason of error in most cases. For instance, any errors around new_sequence() would mean negotiation error, not just *ERROR*. And some subclasses will allocate buffer/memory/surface on new_picture() but it could be failed because of expected error, likely flushing Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1019>
192 lines
6.6 KiB
C
192 lines
6.6 KiB
C
/* GStreamer
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* Copyright (C) 2020 Intel Corporation
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* Author: He Junyan <junyan.he@intel.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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_MPEG2_DECODER_H__
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#define __GST_MPEG2_DECODER_H__
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#include <gst/codecs/codecs-prelude.h>
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#include <gst/video/video.h>
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#include <gst/codecparsers/gstmpegvideoparser.h>
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#include <gst/codecs/gstmpeg2picture.h>
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G_BEGIN_DECLS
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#define GST_TYPE_MPEG2_DECODER (gst_mpeg2_decoder_get_type())
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#define GST_MPEG2_DECODER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MPEG2_DECODER,GstMpeg2Decoder))
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#define GST_MPEG2_DECODER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MPEG2_DECODER,GstMpeg2DecoderClass))
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#define GST_MPEG2_DECODER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_MPEG2_DECODER,GstMpeg2DecoderClass))
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#define GST_IS_MPEG2_DECODER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MPEG2_DECODER))
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#define GST_IS_MPEG2_DECODER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MPEG2_DECODER))
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typedef struct _GstMpeg2Decoder GstMpeg2Decoder;
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typedef struct _GstMpeg2DecoderClass GstMpeg2DecoderClass;
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typedef struct _GstMpeg2DecoderPrivate GstMpeg2DecoderPrivate;
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/**
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* GstMpeg2Decoder:
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*
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* The opaque #GstMpeg2Decoder data structure.
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*
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* Since: 1.20
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*/
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struct _GstMpeg2Decoder
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{
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/*< private >*/
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GstVideoDecoder parent;
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/*< protected >*/
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GstVideoCodecState * input_state;
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/*< private >*/
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GstMpeg2DecoderPrivate *priv;
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gpointer padding[GST_PADDING_LARGE];
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};
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/**
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* GstMpeg2DecoderClass:
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*/
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struct _GstMpeg2DecoderClass
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{
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GstVideoDecoderClass parent_class;
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/**
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* GstMpeg2DecoderClass::new_sequence:
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* @decoder: a #GstMpeg2Decoder
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* @seq: a #GstMpegVideoSequenceHdr
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* @seq_ext: a #GstMpegVideoSequenceExt
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*
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* Notifies subclass of SPS update
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*
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* Since: 1.20
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*/
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GstFlowReturn (*new_sequence) (GstMpeg2Decoder * decoder,
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const GstMpegVideoSequenceHdr * seq,
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const GstMpegVideoSequenceExt * seq_ext,
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const GstMpegVideoSequenceDisplayExt * seq_display_ext,
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const GstMpegVideoSequenceScalableExt * seq_scalable_ext);
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/**
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* GstMpeg2DecoderClass::new_picture:
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* @decoder: a #GstMpeg2Decoder
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* @frame: (transfer none): a #GstVideoCodecFrame
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* @picture: (transfer none): a #GstMpeg2Picture
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*
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* Optional. Called whenever new #GstMpeg2Picture is created.
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* Subclass can set implementation specific user data
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* on the #GstMpeg2Picture via gst_mpeg2_picture_set_user_data()
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*
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* Since: 1.20
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*/
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GstFlowReturn (*new_picture) (GstMpeg2Decoder * decoder,
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GstVideoCodecFrame * frame,
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GstMpeg2Picture * picture);
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/**
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* GstMpeg2DecoderClass::new_field_picture:
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* @decoder: a #GstMpeg2Decoder
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* @first_field: (transfer none): the first field #GstMpeg2Picture already decoded
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* @second_field: (transfer none): a #GstMpeg2Picture for the second field
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*
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* Called when a new field picture is created for interlaced field picture.
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* Subclass can attach implementation specific user data on @second_field via
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* gst_mpeg2_picture_set_user_data()
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*
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* Since: 1.20
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*/
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GstFlowReturn (*new_field_picture) (GstMpeg2Decoder * decoder,
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const GstMpeg2Picture * first_field,
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GstMpeg2Picture * second_field);
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/**
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* GstMpeg2DecoderClass::start_picture:
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* @decoder: a #GstMpeg2Decoder
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* @picture: (transfer none): a #GstMpeg2Picture
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* @slice: (transfer none): a #GstMpeg2Slice
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* @prev_picture: (transfer none): a #GstMpeg2Picture
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* @next_picture: (transfer none): a #GstMpeg2Picture
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*
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* Optional. Called per one #GstMpeg2Picture to notify subclass to prepare
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* decoding process for the #GstMpeg2Picture
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*
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* Since: 1.20
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*/
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GstFlowReturn (*start_picture) (GstMpeg2Decoder * decoder,
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GstMpeg2Picture * picture,
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GstMpeg2Slice * slice,
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GstMpeg2Picture * prev_picture,
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GstMpeg2Picture * next_picture);
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/**
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* GstMpeg2DecoderClass::decode_slice:
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* @decoder: a #GstMpeg2Decoder
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* @picture: (transfer none): a #GstMpeg2Picture
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* @slice: (transfer none): a #GstMpeg2Slice
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*
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* Provides per slice data with parsed slice header and required raw bitstream
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* for subclass to decode it.
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*
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* Since: 1.20
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*/
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GstFlowReturn (*decode_slice) (GstMpeg2Decoder * decoder,
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GstMpeg2Picture * picture,
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GstMpeg2Slice * slice);
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/**
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* GstMpeg2DecoderClass::end_picture:
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* @decoder: a #GstMpeg2Decoder
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* @picture: (transfer none): a #GstMpeg2Picture
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*
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* Optional. Called per one #GstMpeg2Picture to notify subclass to finish
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* decoding process for the #GstMpeg2Picture
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*
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* Since: 1.20
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*/
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GstFlowReturn (*end_picture) (GstMpeg2Decoder * decoder,
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GstMpeg2Picture * picture);
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/**
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* GstMpeg2DecoderClass::output_picture:
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* @decoder: a #GstMpeg2Decoder
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* @frame: (transfer full): a #GstVideoCodecFrame
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* @picture: (transfer full): a #GstMpeg2Picture
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*
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* Called with a #GstMpeg2Picture which is required to be outputted.
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* The #GstVideoCodecFrame must be consumed by subclass.
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*
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* Since: 1.20
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*/
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GstFlowReturn (*output_picture) (GstMpeg2Decoder * decoder,
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GstVideoCodecFrame * frame,
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GstMpeg2Picture * picture);
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/*< private >*/
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gpointer padding[GST_PADDING_LARGE];
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};
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstMpeg2Decoder, gst_object_unref)
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GST_CODECS_API
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GType gst_mpeg2_decoder_get_type (void);
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G_END_DECLS
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#endif /* __GST_MPEG2_DECODER_H__ */
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