vpx/vpx_util/vpx_util.mk

##
## Copyright (c) 2015 The WebM project authors. All Rights Reserved.
##
##  Use of this source code is governed by a BSD-style license
##  that can be found in the LICENSE file in the root of the source
##  tree. An additional intellectual property rights grant can be found
##  in the file PATENTS.  All contributing project authors may
##  be found in the AUTHORS file in the root of the source tree.
##

UTIL_SRCS-yes += vpx_atomics.h
UTIL_SRCS-yes += vpx_util.mk
UTIL_SRCS-yes += vpx_thread.c
UTIL_SRCS-yes += vpx_thread.h
UTIL_SRCS-yes += endian_inl.h
UTIL_SRCS-yes += vpx_write_yuv_frame.h
UTIL_SRCS-yes += vpx_write_yuv_frame.c
Move multi-threading module functions into vpx_thread folder This commit moves the primitive multi-threading files from vp9 folder to vpx_thread, which will be accessible by all vpx codec. Change-Id: Ib51e66e9c69801c10631fab56d35a0c0aaed5883 2015-07-01 23:58:13 +02:00			`##`
			`## Copyright (c) 2015 The WebM project authors. All Rights Reserved.`
			`##`
			`## Use of this source code is governed by a BSD-style license`
			`## that can be found in the LICENSE file in the root of the source`
			`## tree. An additional intellectual property rights grant can be found`
			`## in the file PATENTS. All contributing project authors may`
			`## be found in the AUTHORS file in the root of the source tree.`
			`##`

Add atomics to vp8 synchronization primitives. Fixes issue on iPad Pro 10.5 (and probably other places) where threads are not properly synchronized. On x86 this data race was benign as load and store instructions are atomic, they were being atomic in practice as the program hasn't been observed to be miscompiled. Such guarantees are not made outside x86, and real problems manifested where libvpx reliably reproduced a broken bitstream for even just the initial keyframe. This was detected in WebRTC where this device started using multithreading (as its CPU count is higher than earlier devices, where the problem did not manifest as single-threading was used in practice). This issue was not detected under thread-sanitizer bots as mutexes were conditionally used under this platform to simulate the protected read and write semantics that were in practice provided on x86 platforms. This change also removes several mutexes, so encoder/decoder state is lighter-weight after this change and we do not need to initialize so many mutexes (this was done even on non-thread-sanitizer platforms where they were unused). Change-Id: If41fcb0d99944f7bbc8ec40877cdc34d672ae72a 2017-08-26 00:48:11 +02:00			`UTIL_SRCS-yes += vpx_atomics.h`
Rename vpx_thread to vpx_util Change the dir name to include more util tools. Change-Id: Id5b16062803ce5eed872fe2edb36d7e56b32eed8 2015-07-02 19:01:09 +02:00			`UTIL_SRCS-yes += vpx_util.mk`
			`UTIL_SRCS-yes += vpx_thread.c`
			`UTIL_SRCS-yes += vpx_thread.h`
Fill buffer speed up Eliminates the byte by byte read from bool decoder, by reading in a size_t and then shifting it into place. Change-Id: I0ed8c7b6f942847e79cc90105dc1d2b5b3deb0d6 2015-07-14 18:19:01 +02:00			`UTIL_SRCS-yes += endian_inl.h`
Remove duplication on vp8/9_write_yuv_frame. Change-Id: Ib3546032a27c715bf509c0e24d26a189bc829da8 2017-06-09 01:07:02 +02:00			`UTIL_SRCS-yes += vpx_write_yuv_frame.h`
			`UTIL_SRCS-yes += vpx_write_yuv_frame.c`