FFmpeg
libavcodec
libjxl.c
Go to the documentation of this file.
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/*
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* JPEG XL de/encoding via libjxl, common support implementation
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* Copyright (c) 2021 Leo Izen <leo.izen@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* JPEG XL via libjxl common support implementation
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*/
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#include "
libavutil/cpu.h
"
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#include "
libavutil/mem.h
"
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#include <jxl/memory_manager.h>
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#include "
libjxl.h
"
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size_t
ff_libjxl_get_threadcount
(
int
threads)
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{
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if
(threads <= 0)
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return
av_cpu_count
();
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if
(threads == 1)
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return
0;
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return
threads;
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}
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/**
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* Wrapper around av_malloc used as a jpegxl_alloc_func.
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*
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* @param opaque opaque pointer for jpegxl_alloc_func, always ignored
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* @param size Size in bytes for the memory block to be allocated
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* @return Pointer to the allocated block, or `NULL` if it cannot be allocated
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*/
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static
void
*
libjxl_av_malloc
(
void
*opaque,
size_t
size
)
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{
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return
av_malloc
(
size
);
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}
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/**
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* Wrapper around av_free used as a jpegxl_free_func.
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*
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* @param opaque opaque pointer for jpegxl_free_func, always ignored
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* @param address Pointer to the allocated block, to free. `NULL` permitted as a no-op.
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*/
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static
void
libjxl_av_free
(
void
*opaque,
void
*address)
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{
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av_free
(address);
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}
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void
ff_libjxl_init_memory_manager
(JxlMemoryManager *manager)
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{
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manager->opaque =
NULL
;
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manager->alloc = &
libjxl_av_malloc
;
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manager->free = &
libjxl_av_free
;
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}
ff_libjxl_get_threadcount
size_t ff_libjxl_get_threadcount(int threads)
Transform threadcount in ffmpeg to one used by libjxl.
Definition:
libjxl.c:33
libjxl.h
av_malloc
#define av_malloc(s)
Definition:
tableprint_vlc.h:30
NULL
#define NULL
Definition:
coverity.c:32
libjxl_av_free
static void libjxl_av_free(void *opaque, void *address)
Wrapper around av_free used as a jpegxl_free_func.
Definition:
libjxl.c:60
av_cpu_count
int av_cpu_count(void)
Definition:
cpu.c:217
cpu.h
size
int size
Definition:
twinvq_data.h:10344
libjxl_av_malloc
static void * libjxl_av_malloc(void *opaque, size_t size)
Wrapper around av_malloc used as a jpegxl_alloc_func.
Definition:
libjxl.c:49
mem.h
av_free
#define av_free(p)
Definition:
tableprint_vlc.h:33
ff_libjxl_init_memory_manager
void ff_libjxl_init_memory_manager(JxlMemoryManager *manager)
Initialize and populate a JxlMemoryManager with av_malloc() and av_free() so libjxl will use these fu...
Definition:
libjxl.c:65
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