dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-16 05:49:51 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

up to 20% faster multi-threaded decoding

Browse Source 
Mostly visible for large images.
Reconstruction+filtering is now done in parallel to bitstream-parsing.

Change-Id: I4cc4483d803b255f4d97a2fcd9158b1c291dd900
This commit is contained in:
skal
2013-10-15 00:25:21 +02:00
parent 38efdc2e9c
commit 0532149c8a
4 changed files with 49 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/dec/vp8i.h
View File

@ -197,11 +197,12 @@ typedef struct {
// Persistent information needed by the parallel processing
typedef struct {
int id_; // cache row to process (in [0..2])
int mb_y_; // macroblock position of the row
int filter_row_; // true if row-filtering is needed
VP8FInfo* f_info_; // filter strengths
VP8Io io_; // copy of the VP8Io to pass to put()
int id_; // cache row to process (in [0..2])
int mb_y_; // macroblock position of the row
int filter_row_; // true if row-filtering is needed
VP8FInfo* f_info_; // filter strengths (swapped with dec->f_info_)
VP8MBData* mb_data_; // reconstruction data (swapped with dec->mb_data_)
VP8Io io_; // copy of the VP8Io to pass to put()
} VP8ThreadContext;
// Saved top samples, per macroblock. Fits into a cache-line.
@ -287,8 +288,8 @@ struct VP8Decoder {
size_t mem_size_;
// Per macroblock non-persistent infos.
int mb_x_, mb_y_; // current position, in macroblock units
VP8MBData* mb_data_; // reconstruction data
int mb_x_, mb_y_; // current position, in macroblock units
VP8MBData* mb_data_; // parsed reconstruction data
// Filtering side-info
int filter_type_; // 0=off, 1=simple, 2=complex
@ -324,8 +325,6 @@ void VP8ParseQuant(VP8Decoder* const dec);
// in frame.c
int VP8InitFrame(VP8Decoder* const dec, VP8Io* io);
// Reconstruct a full row of blocks (prediction + residual adding)
void VP8ReconstructBlocks(const VP8Decoder* const dec, int mb_y);
// Call io->setup() and finish setting up scan parameters.
// After this call returns, one must always call VP8ExitCritical() with the
// same parameters. Both functions should be used in pair. Returns VP8_STATUS_OK