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/*
* Copyright (c) 2015 Kostya Shishkov
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVSCALE_INTERNAL_H
#define AVSCALE_INTERNAL_H
#include "libavutil/dict.h"
#include "libavutil/log.h"
#include "avscale.h"
typedef struct AVScaleFilterStage {
void (*deinit)(struct AVScaleFilterStage *stage);
void (*do_common)(void *ctx,
uint8_t *src[AVSCALE_MAX_COMPONENTS],
int sstrides[AVSCALE_MAX_COMPONENTS],
uint8_t *dst[AVSCALE_MAX_COMPONENTS],
int dstrides[AVSCALE_MAX_COMPONENTS],
int w, int h);
void (*do_component[AVSCALE_MAX_COMPONENTS])(void *ctx,
uint8_t *src, int sstride,
uint8_t *dst, int dstride,
int w, int h);
void *do_common_ctx;
void *do_component_ctx[AVSCALE_MAX_COMPONENTS];
uint8_t *src[AVSCALE_MAX_COMPONENTS]; // null if current input should be used
int src_stride[AVSCALE_MAX_COMPONENTS];
uint8_t *dst[AVSCALE_MAX_COMPONENTS]; // null if default output should be used
int dst_stride[AVSCALE_MAX_COMPONENTS];
int w[AVSCALE_MAX_COMPONENTS], h[AVSCALE_MAX_COMPONENTS];
struct AVScaleFilterStage *next;
} AVScaleFilterStage;
struct AVScaleContext {
const AVClass *av_class;
const AVPixelFormaton *src_fmt, *dst_fmt;
AVPixelFormaton cur_fmt;
int cur_w, cur_h;
int dst_w, dst_h;
AVScaleFilterStage *head, *tail;
};
typedef struct AVScaleKernel {
const char *name; // for convenience
// init worker-specific contexts and set working functions
// e.g. for YUV2RGB it will init do_common_ctx with YUV2RGB tables
// and set do_common = convert_yuv2rgb
int (*kernel_init)(AVScaleContext *ctx, const struct AVScaleKernel *kern,
AVScaleFilterStage *stage,
AVDictionary *opts);
} AVScaleKernel;
const AVScaleKernel *avscale_find_kernel(const char *name);
int avscale_apply_kernel(AVScaleContext *ctx, const char *name, AVScaleFilterStage *stage);
uint8_t *avscale_get_component_ptr(AVFrame *src, int component_id);
int avscale_get_component_stride(AVFrame *src, int component_id);
#endif /* AVSCALE_INTERNAL_H */
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