dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-14 21:09:55 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

1.5x-2x faster encoding for method 3 and up

Browse Source 
using token-buffer (that is: slightly more memory. O(output_size))

This change is ON by default. To return to previous behaviour, use
'cwebp -low_memory' or set config.low_memory to true.

Side-effect of this new mode: it forces 1 partition only (which was
default anyway), and makes some statistics about the bitstream
no longer available. cwebp will no longer report 'intra4-coeffs', etc.

This mode also doesn't work (yet) with multi-pass, and -low_memory
is currently forced for multi-pass.

also: reversed the flag: USE_TOKEN_BUFFER -> DISABLE_TOKEN_BUFFER
also: fixed the kAverageBytesPerMB estimate

Change-Id: I4ea80382038d6df4309663e0cb7bd88d9bca9cf1
This commit is contained in:
skal
2013-03-12 00:37:42 +01:00
committed by James Zern
parent be2fd1735a
commit 9bfbdd144f
10 changed files with 346 additions and 184 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/webp/encode.h
View File

@ -18,7 +18,7 @@
extern "C" {
#endif
#define WEBP_ENCODER_ABI_VERSION 0x0200 // MAJOR(8b) + MINOR(8b)
#define WEBP_ENCODER_ABI_VERSION 0x0201 // MAJOR(8b) + MINOR(8b)
#if !(defined(__cplusplus) || defined(c_plusplus))
typedef enum WebPImageHint WebPImageHint;
@ -126,8 +126,9 @@ struct WebPConfig {
// JPEG compression. Generally, the output size will
// be similar but the degradation will be lower.
int thread_level; // If non-zero, try and use multi-threaded encoding.
int low_memory; // If set, reduce memory usage (but increase CPU use).
uint32_t pad[6]; // padding for later use
uint32_t pad[5]; // padding for later use
};
// Enumerate some predefined settings for WebPConfig, depending on the type