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/*
* OMAP3 ISP library - OMAP3 ISP statistics
*
* Copyright (C) 2010-2012 Ideas on board SPRL
*
* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 General Public License for
* more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __OMAP3ISP_STATS_H
#define __OMAP3ISP_STATS_H
#include <stdint.h>
struct omap3_isp_device;
enum omap3_isp_stat_engine {
OMAP3_ISP_STAT_AEWB = 1 << 0,
OMAP3_ISP_STAT_HIST = 1 << 1,
};
/*
* struct omap3_isp_aewb_stats - OMAP3 ISP AEWB statistics
* @npix: Total number of accumulated pixels
* @unsat: Number of accumulated unsaturated pixels
* @accum: Accumulators
*
* The first 4 accumulators store the accumulated pixel values for the 4 color
* components, organized as follows.
*
* +---+---+
* | 0 | 1 |
* +---+---+
* | 2 | 3 |
* +---+---+
*
* The next 4 accumulators are similar, but store the accumulated saturated
* (clipped) pixel values.
*/
struct omap3_isp_aewb_stats {
uint32_t npix;
uint32_t unsat;
uint32_t accum[8];
};
/*
* struct omap3_isp_histogram_stats - OMAP3 ISP histogram statistics
* @nbins: Number of bins in the histogram
* @bins: Array of histogram frequency data
*
* Each bin entry is stored on 32 bits but limited to 20 bits.
*/
struct omap3_isp_histogram_stats {
unsigned int nbins;
uint32_t *bins;
};
/*
* omap3_isp_stats_enable - Enable or disable the statistics engine
* @isp: The ISP device
* @which: The statistics engine(s) to enable
*
* The statistics engines must be enabled prior to starting the video stream.
* When enabled, statistics will be computed for every frame and delivered
* through the ISP aewb_ready() and histogram_ready() callbacks.
*/
void omap3_isp_stats_enable(struct omap3_isp_device *isp,
enum omap3_isp_stat_engine which);
/*
* omap3_isp_stats_get_format - Get frame format at the statistics engine input
* @isp: The ISP device
* @format: Frame format
*
* Fill the format argument with the frame format at the statistics engine
* input.
*/
int omap3_isp_stats_get_format(struct omap3_isp_device *isp,
struct v4l2_mbus_framefmt *format);
/*
* omap3_isp_aewb_configure - Configure the AEWB statistics engine
* @isp: The ISP device
* @rect: The region of interest, relative to the sensor output frame size
* @saturation: Pixel saturation threshold value
*/
int omap3_isp_aewb_configure(struct omap3_isp_device *isp, struct v4l2_rect *rect,
unsigned int saturation);
/*
* omap3_isp_histogram_configure - Configure the histogram statistics engine
* @isp: The ISP device
* @rect: The region of interest, relative to the sensor output frame size
*/
int omap3_isp_histogram_configure(struct omap3_isp_device *isp,
struct v4l2_rect *rect);
#endif
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