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Some renaming/comments related to palette in lossless encoder.

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Change-Id: Iaab32912f4c31e809d7a49fd748099d8c0c3e7d9
This commit is contained in:
Urvang Joshi 2012-04-23 07:40:34 +00:00 committed by James Zern
parent 4d02d5863f
commit 3d33ecd12b
1 changed files with 11 additions and 5 deletions
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16
src/enc/vp8l.c
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@ -41,9 +41,11 @@ static int CompareColors(const void* p1, const void* p2) {
return 1; return 1;
} }
static int CreatePalette256(const uint32_t* const argb, int num_pix, // If number of colors in the image is less than or equal to MAX_PALETTE_SIZE,
uint32_t palette[MAX_PALETTE_SIZE], // creates a palette and returns true, else returns false.
int* const palette_size) { static int AnalyzeAndCreatePalette(const uint32_t* const argb, int num_pix,
uint32_t palette[MAX_PALETTE_SIZE],
int* const palette_size) {
int i, key; int i, key;
int num_colors = 0; int num_colors = 0;
uint8_t in_use[MAX_PALETTE_SIZE * 4] = { 0 }; uint8_t in_use[MAX_PALETTE_SIZE * 4] = { 0 };
@ -137,8 +139,9 @@ static int VP8LEncAnalyze(VP8LEncoder* const enc) {
enc->use_cross_color_ = 1; enc->use_cross_color_ = 1;
} }
enc->use_palette_ = CreatePalette256(pic->argb, pic->width * pic->height, enc->use_palette_ =
enc->palette_, &enc->palette_size_); AnalyzeAndCreatePalette(pic->argb, pic->width * pic->height,
enc->palette_, &enc->palette_size_);
return 1; return 1;
} }
@ -1062,6 +1065,9 @@ static WebPEncodingError AllocateTransformBuffer(VP8LEncoder* const enc,
return err; return err;
} }
// Note: Expects "enc->palette_" to be set properly.
// Also, "enc->palette_" will be modified after this call and should not be used
// later.
static WebPEncodingError ApplyPalette(VP8LBitWriter* const bw, static WebPEncodingError ApplyPalette(VP8LBitWriter* const bw,
VP8LEncoder* const enc, VP8LEncoder* const enc,
int width, int height, int quality) { int width, int height, int quality) {