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24eb35f113
The dynamic resolution changes when the sequence starts when the decoder detects a coded frame with one or more of the following parameters different from those previously established (and reflected by corresponding queries): 1.coded resolution (OUTPUT width and height), 2.visible resolution (selection rectangles), 3.the minimum number of buffers needed for decoding, 4.bit-depth of the bitstream has been changed. Although gstreamer parser has parsed the stream resolution. but there are some case that we need to handle resolution change event. 1. bit-depth is different from the negotiated format. 2. the capture buffer count can meet the demand 3. there are some hardware limitations that the decoded resolution may be larger than the display size. For example, the stream size is 1920x1080, but some vpu may decode it to 1920x1088. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1381>
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
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* Copyright (C) 2014 Collabora Ltd.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.co.uk>
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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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*/
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#ifndef __GST_V4L2_VIDEO_DEC_H__
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#define __GST_V4L2_VIDEO_DEC_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/video/gstvideodecoder.h>
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#include <gst/video/gstvideometa.h>
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#include <gstv4l2object.h>
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#include <gstv4l2bufferpool.h>
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G_BEGIN_DECLS
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#define GST_TYPE_V4L2_VIDEO_DEC \
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(gst_v4l2_video_dec_get_type())
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#define GST_V4L2_VIDEO_DEC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4L2_VIDEO_DEC,GstV4l2VideoDec))
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#define GST_V4L2_VIDEO_DEC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4L2_VIDEO_DEC,GstV4l2VideoDecClass))
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#define GST_IS_V4L2_VIDEO_DEC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4L2_VIDEO_DEC))
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#define GST_IS_V4L2_VIDEO_DEC_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4L2_VIDEO_DEC))
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typedef struct _GstV4l2VideoDec GstV4l2VideoDec;
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typedef struct _GstV4l2VideoDecClass GstV4l2VideoDecClass;
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struct _GstV4l2VideoDec
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{
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GstVideoDecoder parent;
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/* < private > */
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GstV4l2Object * v4l2output;
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GstV4l2Object * v4l2capture;
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/* pads */
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GstCaps *probed_srccaps;
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GstCaps *probed_sinkcaps;
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/* State */
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GstVideoCodecState *input_state;
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gboolean active;
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GstFlowReturn output_flow;
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/* dynamic resolution change flag */
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gboolean capture_configuration_change;
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};
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struct _GstV4l2VideoDecClass
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{
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GstVideoDecoderClass parent_class;
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gchar *default_device;
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};
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GType gst_v4l2_video_dec_get_type (void);
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gboolean gst_v4l2_is_video_dec (GstCaps * sink_caps, GstCaps * src_caps);
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void gst_v4l2_video_dec_register (GstPlugin * plugin,
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const gchar *basename,
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const gchar *device_path, gint video_fd,
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GstCaps * sink_caps, GstCaps * src_caps);
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G_END_DECLS
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#endif /* __GST_V4L2_VIDEO_DEC_H__ */
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