mirror of
https://github.com/FFmpeg/FFmpeg.git
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458cc7e314
This commit adds decoding support to libavcodec for Jpeg XL images via the external library libjxl.
71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/*
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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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}
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