Commit Graph

19 Commits

Author SHA1 Message Date
Pascal Massimino
5b90d8fe42 Unify the API between VP8BitWriter and VP8LBitWriter
BitReader will be next...

Change-Id: Icd9e7ab2e3890131e664c0523627d9b8c5399a74
2014-10-23 15:35:16 +02:00
James Zern
4c6dde37b9 bit_writer: cosmetics: rename kFlush() -> Flush()
Change-Id: I8907927974188bee85ffade1d75d2e50817aa115
2014-08-05 22:14:29 -07:00
James Zern
d5104b1ff6 utils: add endian_inl.h
moves the following to this header:
- htole*() definitions from bit_writer.c
- __BIG_ENDIAN__ fallback define from bit_reader_inl.h

Change-Id: I7fff59543f08a70bf8f9ddac849b72ed290471b1
2014-07-03 13:07:14 -07:00
skal
176fda2650 fix the bit-writer for lossless in 32bit mode
Sometimes, we can write 18bit or more at time, and it would
overflow the 32bit accumulator.

Also clarified the num-bits limitations (and exposed
VP8L_MAX_NUM_BIT_READ in bit_reader.h)

fixes http://code.google.com/p/webp/issues/detail?id=200

Seems a bit faster (use of local fields for bits_ / used_)

also: added the __QNX__ bswap while at it.

Change-Id: I876db93a931db15b083cf1d838c70105effa7167
2014-05-22 07:19:22 +02:00
skal
af93bdd6bc use WebPSafe[CM]alloc/WebPSafeFree instead of [cm]alloc/free
there's still some malloc/free in the external example
This is an encoder API change because of the introduction
of WebPMemoryWriterClear() for symmetry reasons.

The MemoryWriter object should probably go in examples/ instead
of being in the main lib, though.
mux_types.h stil contain some inlined free()/malloc() that are
harder to remove (we need to put them in the libwebputils lib
and make sure link is ok). Left as a TODO for now.

Also: WebPDecodeRGB*() function are still returning a pointer
that needs to be free()'d. We should call WebPSafeFree() on
these, but it means exposing the whole mechanism. TODO(later).

Change-Id: Iad2c9060f7fa6040e3ba489c8b07f4caadfab77b
2014-03-27 15:50:59 -07:00
Pascal Massimino
b2fbc36c26 fix VC12-x64 warning
"conversion from 'vp8l_atype_t' to 'uint8_t', possible loss of data"

Change-Id: I7607a688d16aca8fae8ce472450f8423c48f3a26
2014-02-12 12:19:32 -08:00
skal
bf182e837e VP8LBitWriter: use a bit-accumulator
* simplify the endian logic
* remove the need for memset()
* write 16 or 32 at a time (likely aligned)

Makes the code a bit faster on ARM (~1%)

Change-Id: I650bc5654e8d0b0454318b7a78206b301c5f6c2c
2014-02-11 09:12:45 -08:00
James Zern
5227d99146 drop: ifdef __cplusplus checks from C files
the prototypes are already marked in the headers

Change-Id: I172fe742200c939ca32a70a2299809b8baf9b094
2013-12-13 11:42:13 -08:00
James Zern
4931c3294b cosmetics: fix some typos
Change-Id: I0d6efebd817815139db5ae87236fd8911df4d53c
2013-11-26 19:21:14 -08:00
skal
d51f45f047 fix some warnings from static analysis
http://code.google.com/p/webp/issues/detail?id=138

Change-Id: I21470e965357cc14eab356e2c477c7846ff76ef2
2013-09-13 11:33:30 +02:00
James Zern
d640614d54 update copyright text
rather than symlink the webm/vpx terms, use the same header as libvpx to
reference in-tree files

based on the discussion in:
https://codereview.chromium.org/12771026/

Change-Id: Ia3067ecddefaa7ee01550136e00f7b3f086d4af4
2013-06-06 23:09:14 -07:00
Pascal Massimino
c19333173a extra size check for security
no speed diff observed by removing the test before calling BitWriterResize().

+ remove some unnecessary memset() in VP8LBitWriter
+ fix mixed code/variable-decl in BIG_ENDIAN mode

Change-Id: I36be61f83d10a43e4682b680c2dae0e494da4218
2012-08-01 00:37:24 -07:00
James Zern
f56a369ab0 fix big-endian VP8LWriteBits
bits would be lost if n_bits was > 17

Change-Id: Id315d075075338a08e10c04faa91cab347a53591
2012-07-02 14:30:41 -07:00
Pascal Massimino
78f3e34504 Enable lossless encoder code
Remove USE_LOSSLESS_ENCODER compile flag
Update Makefile.am and makefile.unix

Change-Id: If7080c4d8f37994c7c784730c5e547bb0a851455
2012-06-13 00:26:58 -07:00
Urvang Joshi
6b38378acb Guard the lossless encoder (in flux) under a flag
Change-Id: I6dd8fd17089c199001c06b1afde14233dc3e3234
2012-05-07 14:24:23 -07:00
Vikas Arora
227110c4c3 libwebp interface changes for lossless encoding.
Change-Id: I703a1a18347acf78378cb23fddc6e5ca6dc6a0bb
2012-05-07 14:24:09 -07:00
James Zern
ad1e163a0d cosmetics: normalize copyright headers
Change-Id: I5e2462b101e0447a4f15a1455c07131bc97a52dd
2012-01-06 14:49:06 -08:00
Pascal Massimino
30971c9e95 Implement progress report (and user abort)
New cwebp flag is -progress

Change-Id: Ied872cca13f512036860783bbee1bdbccad72768
2011-12-01 14:19:40 -08:00
Pascal Massimino
b112e83647 create a libwebputils under src/utils
with bit_reader bit_writer and thread for now.

Change-Id: If961933fcfc43e60220913fe4d527230ba8f46bb
2011-09-13 15:34:15 -07:00