mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
a4f7fabc26
We have more mutexes/condition variables whose initialization is unchecked. Also use a proper namespace for these functions. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
67 lines
3.0 KiB
C
67 lines
3.0 KiB
C
/*
|
|
* 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
|