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Fix prediction transform in lossless encoder.

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(Keep one tile as a scratch buffer).

Change-Id: If112ada29bfd0bdc81b82e849a566b30dd331d2f
This commit is contained in:
Urvang Joshi
2012-04-17 08:29:05 +00:00
committed by James Zern
parent 36dabdadf8
commit 4f0c5caf67
3 changed files with 63 additions and 64 deletions
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3
src/enc/vp8l.c
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@ -1036,8 +1036,9 @@ static void DeleteVP8LEncoder(VP8LEncoder* enc) {
static WebPEncodingError AllocateTransformBuffer(VP8LEncoder* const enc,
int height, int width) {
WebPEncodingError err = VP8_ENC_OK;
const size_t tile_size = 1 << enc->transform_bits_;
const size_t image_size = height * width;
const size_t argb_scratch_size = 2 * width;
const size_t argb_scratch_size = tile_size * tile_size;
const size_t transform_data_size =
VP8LSubSampleSize(height, enc->transform_bits_) *
VP8LSubSampleSize(width, enc->transform_bits_);

2
src/enc/vp8li.h
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@ -38,7 +38,7 @@ typedef struct {
WebPPicture* pic_; // input picture.
uint32_t* argb_; // Transformed argb image data.
uint32_t* argb_scratch_; // Scratch memory for current and top row.
uint32_t* argb_scratch_; // Scratch memory for one argb tile
// (used for prediction).
uint32_t* transform_data_; // Scratch memory for transform data.
int current_width_; // Corresponds to packed image width.