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// 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
#include "webp/config.h"
#include "webp/types.h"
#ifdef __cplusplus
extern "C" {
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 {
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"