According to https://gcc.gnu.org/onlinedocs/gcc/extensions-to-the-c-language-family/how-to-use-inline-assembly-language-in-c-code.html
For the C language, the asm keyword is a GNU extension. When
writing C code that can be compiled with -ansi and the -std options
that select C dialects without GNU extensions, use __asm__ instead
of asm (see Alternate Keywords). For the C++ language, asm is a
standard keyword, but __asm__ can be used for code compiled with
-fno-asm.
Change-Id: I4af950e67c857c890290c1e3d9cc886da0748784
This makes it easier to read and copy/paste, though this is just rough
pseudo-code. It also matches the formatting of the advanced decoder
example.
Change-Id: I6a4d0a04a12bfc1f1956ac965ff4869cefc4f3df
4 bits are read ([0, 15]) with 4 added to the result. The check that the
result is not > NUM_CODE_LENGTH_CODES (19) is redundant. This makes the
check an assert for documentation purposes.
webp-lossless-bitstream-spec.txt is updated accordingly.
Bug: webp:611
Change-Id: Ie461017dc9de3da4cfe6856543d3dcf58f53a180
ExpandColorMap() can fail due to a memory allocation failure.
Found by Nallocfuzz (https://github.com/catenacyber/nallocfuzz).
Change-Id: I868c5db2fee18e876f4aa3b63e744d7297d1a91b
in AllocateAlphaPlane() and VP8DecompressAlphaRows().
Found by Nallocfuzz (https://github.com/catenacyber/nallocfuzz).
Change-Id: I39eb305abfe9f4d7915cce5d91e72917f482bc20
This is unnecessary as green will have the largest value; the sizes are
currently: 256 + 24 + color_cache_size, 256, 40, in that order.
Change-Id: Ib9ce3292285a7b9c6089557b68a87184b68d17a5
Users of the encoder (including anim_encode.c) and areas of the encoder
itself rely on the status returned via WebPPicture.
Change-Id: Id786176b8ac3b2329d1e41b9dacbb8dcc5d822e4
VP8LBitWriterFinish() may cause the VP8LBitWriter's buffer to be grown.
If that allocation fails, VP8LBitWriterNumBytes() will return a size
larger than the current allocation resulting in a heap overwrite of the
missing bytes.
==13==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x61900005b880 at pc 0x00000049ffc1 bp 0x7fff144f5b40 sp 0x7fff144f5310
READ of size 1028 at 0x61900005b880 thread T0
#0 0x49ffc0 in __asan_memcpy
#1 0x695861 in VP8BitWriterAppend src/utils/bit_writer_utils.c:186:3
#2 0x65acf9 in EncodeAlphaInternal src/enc/alpha_enc.c:169:14
Found by Nallocfuzz (https://github.com/catenacyber/nallocfuzz).
This is the same issue that was fixed in the non-alpha lossless path in:
d49cfbb3 vp8l_enc,WriteImage: add missing error check
Bug: chromium:1455619
Change-Id: I6bd10de213707d3d6b7ce3d0d2b3942af45d317f
VP8LBitWriterFinish() may cause the VP8LBitWriter's buffer to be grown.
If that allocation fails, VP8LBitWriterNumBytes() will return a size
larger than the current allocation resulting in a heap overwrite of the
missing bytes.
==3531848==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x61d000000880 at pc 0x556eddfa1007 bp 0x7ffe434c7a90 sp 0x7ffe434c7260
READ of size 2052 at 0x61d000000880 thread T0
#0 0x556eddfa1006 in __asan_memcpy
#1 0x556eddfeeccf in WebPMemoryWrite src/enc/picture_enc.c:220:5
#2 0x556ede0f9f87 in WriteImage src/enc/vp8l_enc.c:1454:8
Found by Nallocfuzz (https://github.com/catenacyber/nallocfuzz).
Change-Id: Ib1c9454c2c51849b0ba58c5347e6bd5b02a12fbe
This prevents leaks should an allocation fail.
Spotted by Philippe Antoine (p dot antoine at catenacyber dot fr)
and https://github.com/catenacyber/nallocfuzz.
Change-Id: I07a8a475a282b18bf2f9015cc5b1120772babd48
The buffers are made mandatory to match WebPDecodeYUVInto(), though this
conflicts with WebPIDecGetYUVA().
spotted by Oliver Kunz (okunz at google dot com)
Change-Id: Ic4740c53b75da6b93d4f3462303fb9be0ebfbd48
The histograms count the occurrences of len/dist in entropy images.
Those (at most (1<<14) by (1<<14)) are sub-sampled by at least
MIN_HUFFMAN_BITS == 2, hence at most 24 bits in a histogram value.
At most, we multiply by 19 (because the longest histogram is of
size 40 and we do 40>>1, cf code) for the bit cost. So it all fits
in 32 bits.
Change-Id: Ife24b035f54794851ff31f2fac07901f724c6d7f
and define it to true for __aarch64__ and Win Arm64 + Visual Studio.
Microsoft's compiler (cl.exe) does not define __aarch64__, but relies on
_M_ARM64 & _M_ARM64EC
Bug: b/277254922
Change-Id: I20e4fa07a4031599db69e3d7ba9050345315ef51
This avoids defining a version in each translation unit when using
__declspec(dllexport) which causes failures due to multiply defined
symbols with clang-cl:
lld-link: error: duplicate symbol: VP8GetCPUInfo
>>> defined at CMakeFiles\webpdecode.dir\Debug\src\dec\alpha_dec.c.obj
>>> defined at CMakeFiles\webpdsp.dir\Debug\src\dsp\dec_sse41.c.obj
...
Bug: webp:607
Change-Id: I6cd1ee75b3db984aa513263a05516e867a64925d
this is always defined by default to 0 since:
v0.6.0-158-g663a6d9d unify the ALTERNATE_CODE flag usage
previously the !defined() check would cause a mismatch between C and
assembly.
Change-Id: Idca0b8e39ca90d63785fd4125aeb7af86c5aae61
This avoids a double free should the function fail prior to
VP8BitWriterInit() and a previous trial result's buffer carried over.
Previously in ApplyFiltersAndEncode() trial.bw (with a previous
iteration's buffer) would be freed, followed by best.bw pointing to the
same buffer.
Since:
187d379d add a fallback to ALPHA_NO_COMPRESSION
In addition, check the return value of VP8BitWriterInit() in this
function.
Bug: webp:603
Change-Id: Ic258381ee26c8c16bc211d157c8153831c8c6910
when threading is disabled; fixes:
src/enc/analysis_enc.c:429:15: warning: Value stored to 'split_row'
during its initialization is never read [deadcode.DeadStores]
const int split_row = (9 * last_row + 15) >> 4;
^~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~
Change-Id: I2b02173bb8c930ed54360cce5c7b88ecce098d83
* changes:
picture_csp_enc.c: remove SafeInitSharpYuv
sharpyuv: prefer webp/types.h
sharpyuv,SharpYuvInit: add mutex protection when available
sharyuv_{neon,sse2}.c: merge WEBP_USE_* sections
add a few missing <stddef.h> includes for NULL
sharpyuv.h: remove <inttypes.h>
thread safety was internalized in:
782ed48c sharpyuv,SharpYuvInit: add mutex protection when available
Change-Id: I2877e7bb78bf89ad7504c33d04b22952c0c0a968
move WEBP_EXTERN definition from Makefile.vc to webp/types.h using the
existing WEBP_DLL define to control its declaration to
__declspec(dllexport); the same is done for SHARPYUV_EXTERN
Change-Id: Iecea360305bdd19a878255470a00b9dcc344c730
