// Copyright 2015 Google Inc. All Rights Reserved.

//

// Use of this source code is governed by a BSD-style license

// that can be found in the COPYING file in the root of the source

// tree. An additional intellectual property rights grant can be found

// in the file PATENTS. All contributing project authors may

// be found in the AUTHORS file in the root of the source tree.

// -----------------------------------------------------------------------------

//

// Utilities for animated images

#ifndef WEBP_EXAMPLES_ANIM_UTIL_H_

#define WEBP_EXAMPLES_ANIM_UTIL_H_

#ifdef HAVE_CONFIG_H

#include "webp/config.h"

#endif

#include "webp/types.h"

#ifdef __cplusplus

extern "C" {

#endif

typedef enum {

ANIM_GIF,

ANIM_WEBP

} AnimatedFileFormat;

typedef struct {

uint8_t* rgba; // Decoded and reconstructed full frame.

int duration; // Frame duration in milliseconds.

int is_key_frame; // True if this frame is a key-frame.

} DecodedFrame;

typedef struct {

AnimatedFileFormat format;

uint32_t canvas_width;

uint32_t canvas_height;

uint32_t bgcolor;

uint32_t loop_count;

DecodedFrame* frames;

uint32_t num_frames;

void* raw_mem;

} AnimatedImage;

// Deallocate everything in 'image' (but not the object itself).

void ClearAnimatedImage(AnimatedImage* const image);

// Read animated image file into 'AnimatedImage' struct.

// If 'dump_frames' is true, dump frames to 'dump_folder'.

// Previous content of 'image' is obliterated.

// Upon successful return, content of 'image' must be deleted by

// calling 'ClearAnimatedImage'.

int ReadAnimatedImage(const char filename[], AnimatedImage* const image,

int dump_frames, const char dump_folder[]);

// Given two RGBA buffers, calculate max pixel difference and PSNR.

// If 'premultiply' is true, R/G/B values will be pre-multiplied by the

// transparency before comparison.

void GetDiffAndPSNR(const uint8_t rgba1[], const uint8_t rgba2[],

uint32_t width, uint32_t height, int premultiply,

int* const max_diff, double* const psnr);

// Return library versions used by anim_util.

void GetAnimatedImageVersions(int* const decoder_version,

int* const demux_version);

#ifdef __cplusplus

} // extern "C"

#endif

#endif // WEBP_EXAMPLES_ANIM_UTIL_H_