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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /media/ffvpx/libavcodec/pthread_internal.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | media/ffvpx/libavcodec/pthread_internal.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/pthread_internal.h b/media/ffvpx/libavcodec/pthread_internal.h new file mode 100644 index 0000000000..d0b6a7a673 --- /dev/null +++ b/media/ffvpx/libavcodec/pthread_internal.h @@ -0,0 +1,66 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_PTHREAD_INTERNAL_H +#define AVCODEC_PTHREAD_INTERNAL_H + +#include "avcodec.h" + +/* H.264 slice threading seems to be buggy with more than 16 threads, + * limit the number of threads to 16 for automatic detection */ +#define MAX_AUTO_THREADS 16 + +int ff_slice_thread_init(AVCodecContext *avctx); +void ff_slice_thread_free(AVCodecContext *avctx); + +int ff_frame_thread_init(AVCodecContext *avctx); +void ff_frame_thread_free(AVCodecContext *avctx, int thread_count); + +#define THREAD_SENTINEL 0 // This forbids putting a mutex/condition variable at the front. +/** + * Initialize/destroy a list of mutexes/conditions contained in a structure. + * The positions of these mutexes/conditions in the structure are given by + * their offsets. Because it is undefined behaviour to destroy + * an uninitialized mutex/condition, ff_pthread_init() stores the number + * of successfully initialized mutexes and conditions in the object itself + * and ff_pthread_free() uses this number to destroy exactly the mutexes and + * condition variables that have been successfully initialized. + * + * @param obj The object containing the mutexes/conditions. + * @param[in] offsets An array of offsets. Its first member gives the offset + * of the variable that contains the count of successfully + * initialized mutexes/condition variables; said variable + * must be an unsigned int. Two arrays of offsets, each + * delimited by a THREAD_SENTINEL follow. The first + * contains the offsets of all the mutexes, the second + * contains the offsets of all the condition variables. + */ +int ff_pthread_init(void *obj, const unsigned offsets[]); +void ff_pthread_free(void *obj, const unsigned offsets[]); + +/** + * Macros to help creating the above lists. mutexes and conds need + * to be parentheses-enclosed lists of offsets in the containing structure. + */ +#define OFFSET_ARRAY(...) __VA_ARGS__, THREAD_SENTINEL +#define DEFINE_OFFSET_ARRAY(type, name, cnt_variable, mutexes, conds) \ +static const unsigned name ## _offsets[] = { offsetof(type, cnt_variable), \ + OFFSET_ARRAY mutexes, \ + OFFSET_ARRAY conds } + +#endif // AVCODEC_PTHREAD_INTERNAL_H |