bdc2df62ae
Pixel color components can be scaled using either bilinear interpolation or a multitap filter. The multitap filter provides better results, but can't be selected when the alpha layer need to be scaled down by more than 1/2. Disable alpha scaling when the input has a fixed alpha value, and program the UDS to output a fixed alpha value in that case. This ensures the multitap filter will be used whenever possible. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
152 lines
3.6 KiB
C
152 lines
3.6 KiB
C
/*
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* vsp1_video.h -- R-Car VSP1 Video Node
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*
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* Copyright (C) 2013-2014 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __VSP1_VIDEO_H__
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#define __VSP1_VIDEO_H__
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/wait.h>
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#include <media/media-entity.h>
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#include <media/videobuf2-core.h>
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struct vsp1_video;
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/*
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* struct vsp1_format_info - VSP1 video format description
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* @mbus: media bus format code
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* @fourcc: V4L2 pixel format FCC identifier
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* @planes: number of planes
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* @bpp: bits per pixel
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* @hwfmt: VSP1 hardware format
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* @swap_yc: the Y and C components are swapped (Y comes before C)
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* @swap_uv: the U and V components are swapped (V comes before U)
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* @hsub: horizontal subsampling factor
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* @vsub: vertical subsampling factor
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* @alpha: has an alpha channel
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*/
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struct vsp1_format_info {
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u32 fourcc;
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unsigned int mbus;
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unsigned int hwfmt;
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unsigned int swap;
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unsigned int planes;
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unsigned int bpp[3];
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bool swap_yc;
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bool swap_uv;
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unsigned int hsub;
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unsigned int vsub;
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bool alpha;
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};
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enum vsp1_pipeline_state {
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VSP1_PIPELINE_STOPPED,
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VSP1_PIPELINE_RUNNING,
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VSP1_PIPELINE_STOPPING,
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};
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/*
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* struct vsp1_pipeline - A VSP1 hardware pipeline
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* @media: the media pipeline
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* @irqlock: protects the pipeline state
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* @lock: protects the pipeline use count and stream count
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*/
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struct vsp1_pipeline {
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struct media_pipeline pipe;
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spinlock_t irqlock;
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enum vsp1_pipeline_state state;
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wait_queue_head_t wq;
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struct mutex lock;
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unsigned int use_count;
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unsigned int stream_count;
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unsigned int buffers_ready;
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unsigned int num_video;
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unsigned int num_inputs;
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struct vsp1_rwpf *inputs[VSP1_MAX_RPF];
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struct vsp1_rwpf *output;
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struct vsp1_entity *bru;
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struct vsp1_entity *lif;
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struct vsp1_entity *uds;
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struct vsp1_entity *uds_input;
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struct list_head entities;
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};
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static inline struct vsp1_pipeline *to_vsp1_pipeline(struct media_entity *e)
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{
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if (likely(e->pipe))
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return container_of(e->pipe, struct vsp1_pipeline, pipe);
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else
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return NULL;
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}
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struct vsp1_video_buffer {
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struct vb2_buffer buf;
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struct list_head queue;
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dma_addr_t addr[3];
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unsigned int length[3];
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};
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static inline struct vsp1_video_buffer *
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to_vsp1_video_buffer(struct vb2_buffer *vb)
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{
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return container_of(vb, struct vsp1_video_buffer, buf);
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}
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struct vsp1_video_operations {
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void (*queue)(struct vsp1_video *video, struct vsp1_video_buffer *buf);
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};
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struct vsp1_video {
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struct vsp1_device *vsp1;
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struct vsp1_entity *rwpf;
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const struct vsp1_video_operations *ops;
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struct video_device video;
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enum v4l2_buf_type type;
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struct media_pad pad;
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struct mutex lock;
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struct v4l2_pix_format_mplane format;
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const struct vsp1_format_info *fmtinfo;
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struct vsp1_pipeline pipe;
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unsigned int pipe_index;
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struct vb2_queue queue;
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void *alloc_ctx;
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spinlock_t irqlock;
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struct list_head irqqueue;
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unsigned int sequence;
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};
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static inline struct vsp1_video *to_vsp1_video(struct video_device *vdev)
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{
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return container_of(vdev, struct vsp1_video, video);
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}
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int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf);
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void vsp1_video_cleanup(struct vsp1_video *video);
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void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe);
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void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
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struct vsp1_entity *input,
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unsigned int alpha);
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#endif /* __VSP1_VIDEO_H__ */
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