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147 lines
4.4 KiB
C
147 lines
4.4 KiB
C
/* GStreamer
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* Copyright (C) 2022 Víctor Jáquez <vjaquez@igalia.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_JPEG_DECODER_H__
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#define __GST_JPEG_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/gstjpegparser.h>
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G_BEGIN_DECLS
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#define GST_TYPE_JPEG_DECODER (gst_jpeg_decoder_get_type())
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#define GST_JPEG_DECODER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_JPEG_DECODER,GstJpegDecoder))
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#define GST_JPEG_DECODER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_JPEG_DECODER,GstJpegDecoderClass))
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#define GST_JPEG_DECODER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_JPEG_DECODER,GstJpegDecoderClass))
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#define GST_IS_JPEG_DECODER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_JPEG_DECODER))
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#define GST_IS_JPEG_DECODER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_JPEG_DECODER))
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#define GST_JPEG_DECODER_CAST(obj) ((GstJpegDecoder*)obj)
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typedef struct _GstJpegDecoderScan GstJpegDecoderScan;
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typedef struct _GstJpegDecoder GstJpegDecoder;
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typedef struct _GstJpegDecoderClass GstJpegDecoderClass;
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typedef struct _GstJpegDecoderPrivate GstJpegDecoderPrivate;
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/**
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* GstJpegDecoderScan:
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*
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* Container for a SOS segment.
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*/
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struct _GstJpegDecoderScan
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{
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GstJpegScanHdr *scan_hdr;
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GstJpegHuffmanTables *huffman_tables;
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GstJpegQuantTables *quantization_tables;
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guint restart_interval;
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guint mcus_per_row;
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guint mcu_rows_in_scan;
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};
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/**
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* GstJpegDecoder:
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*
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* The opaque #GstJpegDecoder data structure.
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*
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* Since: 1.22
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*/
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struct _GstJpegDecoder
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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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GstJpegDecoderPrivate *priv;
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gpointer padding[GST_PADDING_LARGE];
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};
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/**
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* GstJpegDecoderClass:
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*
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* The opaque #GstJpegDecoderClass data structure.
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*/
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struct _GstJpegDecoderClass
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{
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/*< private >*/
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GstVideoDecoderClass parent_class;
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/**
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* GstJpegDecoderClass::new_picture:
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* @decoder: a #GstJpegDecoder
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* @frame: (transfer none): a #GstVideoCodecFrame
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* @frame_hdr: (transfer none): a #GstJpegFrameHdr
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*
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* Called whenever new picture is detected.
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*/
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GstFlowReturn (*new_picture) (GstJpegDecoder * decoder,
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GstVideoCodecFrame * frame,
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GstJpegMarker marker,
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GstJpegFrameHdr * frame_hdr);
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/**
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* GstJpegDecoderClass::decode_scan:
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* @decoder: a #GstJpegDecoder
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* @scan: (transfer none): a #GstJpegDecoderScan
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* @buffer: (transfer none): scan buffer
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* @size: size of @buffer
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*
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* Called whenever new scan is found.
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*/
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GstFlowReturn (*decode_scan) (GstJpegDecoder * decoder,
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GstJpegDecoderScan * scan,
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const guint8 * buffer,
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guint32 size);
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/**
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* GstJpegDecoderClass::end_picture:
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* @decoder: a #GstJpegDecoder
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*
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* Called whenever a picture end mark is found.
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*/
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GstFlowReturn (*end_picture) (GstJpegDecoder * decoder);
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/**
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* GstJpegDecoderClass::output_picture:
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* @decoder: a #GstJpegDecoder
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* @frame: (transfer full): a #GstVideoCodecFrame
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*
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* Called whenever a @frame is required to be outputted. The
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* #GstVideoCodecFrame must be consumed by subclass.
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*/
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GstFlowReturn (*output_picture) (GstJpegDecoder * decoder,
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GstVideoCodecFrame * frame);
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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(GstJpegDecoder, gst_object_unref)
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GST_CODECS_API
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GType gst_jpeg_decoder_get_type (void);
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G_END_DECLS
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#endif /* __GST_JPEG_DECODER_H__ */
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