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Chunk fourCCs for XMP/EXIF

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Use separate fourCCs "XMP " and "EXIF" instead of a common "META"
Also, some refactorization in webpmux.c

Change-Id: Iad3337e5c1b81e785c60670ce28b1f536dd7ee31
This commit is contained in:
Urvang Joshi
2012-10-31 16:30:41 -07:00
parent 52ad1979d2
commit f903cbab9a
11 changed files with 208 additions and 147 deletions
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14
src/webp/format_constants.h
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@ -70,12 +70,14 @@ typedef enum {
#define FRGM_CHUNK_SIZE 6 // Size of a FRGM chunk.
#define VP8X_CHUNK_SIZE 10 // Size of a VP8X chunk.
#define TILING_FLAG_BIT 0x01 // Set if tiles are possibly used.
#define ANIMATION_FLAG_BIT 0x02 // Set if some animation is expected
#define ICC_FLAG_BIT 0x04 // Whether ICC is present or not.
#define METADATA_FLAG_BIT 0x08 // Set if some META chunk is possibly present.
#define ALPHA_FLAG_BIT 0x10 // Should be same as the ALPHA_FLAG in mux.h
#define ROTATION_FLAG_BITS 0xe0 // all 3 bits for rotation + symmetry
// VP8X Feature Flags. These should be the same as the corresponding values in
// the 'WebPFeatureFlags' enum defined in mux.h.
#define FRAGMENTS_FLAG_BIT 0x01
#define ANIMATION_FLAG_BIT 0x02
#define XMP_FLAG_BIT 0x04
#define EXIF_FLAG_BIT 0x08
#define ALPHA_FLAG_BIT 0x10
#define ICC_FLAG_BIT 0x20
#define MAX_CANVAS_SIZE (1 << 24) // 24-bit max for VP8X width/height.
#define MAX_IMAGE_AREA (1ULL << 32) // 32-bit max for width x height.