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-rw-r--r--drivers/webp/mux/muxi.h232
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diff --git a/drivers/webp/mux/muxi.h b/drivers/webp/mux/muxi.h
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--- a/drivers/webp/mux/muxi.h
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-// Copyright 2011 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.
-// -----------------------------------------------------------------------------
-//
-// Internal header for mux library.
-//
-// Author: Urvang (urvang@google.com)
-
-#ifndef WEBP_MUX_MUXI_H_
-#define WEBP_MUX_MUXI_H_
-
-#include <stdlib.h>
-#include "../dec/vp8i.h"
-#include "../dec/vp8li.h"
-#include "webp/mux.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-//------------------------------------------------------------------------------
-// Defines and constants.
-
-#define MUX_MAJ_VERSION 0
-#define MUX_MIN_VERSION 3
-#define MUX_REV_VERSION 1
-
-// Chunk object.
-typedef struct WebPChunk WebPChunk;
-struct WebPChunk {
- uint32_t tag_;
- int owner_; // True if *data_ memory is owned internally.
- // VP8X, ANIM, and other internally created chunks
- // like ANMF/FRGM are always owned.
- WebPData data_;
- WebPChunk* next_;
-};
-
-// MuxImage object. Store a full WebP image (including ANMF/FRGM chunk, ALPH
-// chunk and VP8/VP8L chunk),
-typedef struct WebPMuxImage WebPMuxImage;
-struct WebPMuxImage {
- WebPChunk* header_; // Corresponds to WEBP_CHUNK_ANMF/WEBP_CHUNK_FRGM.
- WebPChunk* alpha_; // Corresponds to WEBP_CHUNK_ALPHA.
- WebPChunk* img_; // Corresponds to WEBP_CHUNK_IMAGE.
- WebPChunk* unknown_; // Corresponds to WEBP_CHUNK_UNKNOWN.
- int width_;
- int height_;
- int has_alpha_; // Through ALPH chunk or as part of VP8L.
- int is_partial_; // True if only some of the chunks are filled.
- WebPMuxImage* next_;
-};
-
-// Main mux object. Stores data chunks.
-struct WebPMux {
- WebPMuxImage* images_;
- WebPChunk* iccp_;
- WebPChunk* exif_;
- WebPChunk* xmp_;
- WebPChunk* anim_;
- WebPChunk* vp8x_;
-
- WebPChunk* unknown_;
- int canvas_width_;
- int canvas_height_;
-};
-
-// CHUNK_INDEX enum: used for indexing within 'kChunks' (defined below) only.
-// Note: the reason for having two enums ('WebPChunkId' and 'CHUNK_INDEX') is to
-// allow two different chunks to have the same id (e.g. WebPChunkId
-// 'WEBP_CHUNK_IMAGE' can correspond to CHUNK_INDEX 'IDX_VP8' or 'IDX_VP8L').
-typedef enum {
- IDX_VP8X = 0,
- IDX_ICCP,
- IDX_ANIM,
- IDX_ANMF,
- IDX_FRGM,
- IDX_ALPHA,
- IDX_VP8,
- IDX_VP8L,
- IDX_EXIF,
- IDX_XMP,
- IDX_UNKNOWN,
-
- IDX_NIL,
- IDX_LAST_CHUNK
-} CHUNK_INDEX;
-
-#define NIL_TAG 0x00000000u // To signal void chunk.
-
-typedef struct {
- uint32_t tag;
- WebPChunkId id;
- uint32_t size;
-} ChunkInfo;
-
-extern const ChunkInfo kChunks[IDX_LAST_CHUNK];
-
-//------------------------------------------------------------------------------
-// Chunk object management.
-
-// Initialize.
-void ChunkInit(WebPChunk* const chunk);
-
-// Get chunk index from chunk tag. Returns IDX_UNKNOWN if not found.
-CHUNK_INDEX ChunkGetIndexFromTag(uint32_t tag);
-
-// Get chunk id from chunk tag. Returns WEBP_CHUNK_UNKNOWN if not found.
-WebPChunkId ChunkGetIdFromTag(uint32_t tag);
-
-// Convert a fourcc string to a tag.
-uint32_t ChunkGetTagFromFourCC(const char fourcc[4]);
-
-// Get chunk index from fourcc. Returns IDX_UNKNOWN if given fourcc is unknown.
-CHUNK_INDEX ChunkGetIndexFromFourCC(const char fourcc[4]);
-
-// Search for nth chunk with given 'tag' in the chunk list.
-// nth = 0 means "last of the list".
-WebPChunk* ChunkSearchList(WebPChunk* first, uint32_t nth, uint32_t tag);
-
-// Fill the chunk with the given data.
-WebPMuxError ChunkAssignData(WebPChunk* chunk, const WebPData* const data,
- int copy_data, uint32_t tag);
-
-// Sets 'chunk' at nth position in the 'chunk_list'.
-// nth = 0 has the special meaning "last of the list".
-// On success ownership is transferred from 'chunk' to the 'chunk_list'.
-WebPMuxError ChunkSetNth(WebPChunk* chunk, WebPChunk** chunk_list,
- uint32_t nth);
-
-// Releases chunk and returns chunk->next_.
-WebPChunk* ChunkRelease(WebPChunk* const chunk);
-
-// Deletes given chunk & returns chunk->next_.
-WebPChunk* ChunkDelete(WebPChunk* const chunk);
-
-// Deletes all chunks in the given chunk list.
-void ChunkListDelete(WebPChunk** const chunk_list);
-
-// Returns size of the chunk including chunk header and padding byte (if any).
-static WEBP_INLINE size_t SizeWithPadding(size_t chunk_size) {
- return CHUNK_HEADER_SIZE + ((chunk_size + 1) & ~1U);
-}
-
-// Size of a chunk including header and padding.
-static WEBP_INLINE size_t ChunkDiskSize(const WebPChunk* chunk) {
- const size_t data_size = chunk->data_.size;
- assert(data_size < MAX_CHUNK_PAYLOAD);
- return SizeWithPadding(data_size);
-}
-
-// Total size of a list of chunks.
-size_t ChunkListDiskSize(const WebPChunk* chunk_list);
-
-// Write out the given list of chunks into 'dst'.
-uint8_t* ChunkListEmit(const WebPChunk* chunk_list, uint8_t* dst);
-
-//------------------------------------------------------------------------------
-// MuxImage object management.
-
-// Initialize.
-void MuxImageInit(WebPMuxImage* const wpi);
-
-// Releases image 'wpi' and returns wpi->next.
-WebPMuxImage* MuxImageRelease(WebPMuxImage* const wpi);
-
-// Delete image 'wpi' and return the next image in the list or NULL.
-// 'wpi' can be NULL.
-WebPMuxImage* MuxImageDelete(WebPMuxImage* const wpi);
-
-// Count number of images matching the given tag id in the 'wpi_list'.
-// If id == WEBP_CHUNK_NIL, all images will be matched.
-int MuxImageCount(const WebPMuxImage* wpi_list, WebPChunkId id);
-
-// Update width/height/has_alpha info from chunks within wpi.
-// Also remove ALPH chunk if not needed.
-int MuxImageFinalize(WebPMuxImage* const wpi);
-
-// Check if given ID corresponds to an image related chunk.
-static WEBP_INLINE int IsWPI(WebPChunkId id) {
- switch (id) {
- case WEBP_CHUNK_ANMF:
- case WEBP_CHUNK_FRGM:
- case WEBP_CHUNK_ALPHA:
- case WEBP_CHUNK_IMAGE: return 1;
- default: return 0;
- }
-}
-
-// Pushes 'wpi' at the end of 'wpi_list'.
-WebPMuxError MuxImagePush(const WebPMuxImage* wpi, WebPMuxImage** wpi_list);
-
-// Delete nth image in the image list.
-WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth);
-
-// Get nth image in the image list.
-WebPMuxError MuxImageGetNth(const WebPMuxImage** wpi_list, uint32_t nth,
- WebPMuxImage** wpi);
-
-// Total size of the given image.
-size_t MuxImageDiskSize(const WebPMuxImage* const wpi);
-
-// Write out the given image into 'dst'.
-uint8_t* MuxImageEmit(const WebPMuxImage* const wpi, uint8_t* dst);
-
-//------------------------------------------------------------------------------
-// Helper methods for mux.
-
-// Checks if the given image list contains at least one image with alpha.
-int MuxHasAlpha(const WebPMuxImage* images);
-
-// Write out RIFF header into 'data', given total data size 'size'.
-uint8_t* MuxEmitRiffHeader(uint8_t* const data, size_t size);
-
-// Returns the list where chunk with given ID is to be inserted in mux.
-WebPChunk** MuxGetChunkListFromId(const WebPMux* mux, WebPChunkId id);
-
-// Validates the given mux object.
-WebPMuxError MuxValidate(const WebPMux* const mux);
-
-//------------------------------------------------------------------------------
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#endif /* WEBP_MUX_MUXI_H_ */
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