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https://github.com/webmproject/libwebp.git
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1f14632a18
with loop_compatibility disabled (the default), non-zero loop counts will be incremented by 1 for browser rendering compatibility. the max, 65535, is a special case as the muxer will fail if it is exceeded; avoid increasing the limit in this case. this isn't 100% correct, but should be close enough given the high number of iterations. BUG=webp:382,webp:512 Change-Id: Icde3e98a58e9ee89604a72fafda30ab71060dec5 (cherry picked from commitaf0e4fbb06) (cherry picked from commit4b282e13ad)
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// Utilities for animated images
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#ifndef WEBP_EXAMPLES_ANIM_UTIL_H_
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#define WEBP_EXAMPLES_ANIM_UTIL_H_
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#ifdef HAVE_CONFIG_H
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#include "webp/config.h"
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#endif
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#include "webp/types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum {
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ANIM_GIF,
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ANIM_WEBP
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} AnimatedFileFormat;
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typedef struct {
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uint8_t* rgba; // Decoded and reconstructed full frame.
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int duration; // Frame duration in milliseconds.
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int is_key_frame; // True if this frame is a key-frame.
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} DecodedFrame;
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typedef struct {
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AnimatedFileFormat format;
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uint32_t canvas_width;
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uint32_t canvas_height;
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uint32_t bgcolor;
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uint32_t loop_count;
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DecodedFrame* frames;
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uint32_t num_frames;
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void* raw_mem;
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} AnimatedImage;
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// Deallocate everything in 'image' (but not the object itself).
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void ClearAnimatedImage(AnimatedImage* const image);
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// Read animated image file into 'AnimatedImage' struct.
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// If 'dump_frames' is true, dump frames to 'dump_folder'.
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// Previous content of 'image' is obliterated.
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// Upon successful return, content of 'image' must be deleted by
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// calling 'ClearAnimatedImage'.
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int ReadAnimatedImage(const char filename[], AnimatedImage* const image,
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int dump_frames, const char dump_folder[]);
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// Given two RGBA buffers, calculate max pixel difference and PSNR.
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// If 'premultiply' is true, R/G/B values will be pre-multiplied by the
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// transparency before comparison.
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void GetDiffAndPSNR(const uint8_t rgba1[], const uint8_t rgba2[],
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uint32_t width, uint32_t height, int premultiply,
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int* const max_diff, double* const psnr);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBP_EXAMPLES_ANIM_UTIL_H_
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