avcodec/libjxl: add Jpeg XL encoding via libjxl
This commit adds encoding support to libavcodec for Jpeg XL images via the external library libjxl.
This commit is contained in:
parent
458cc7e314
commit
5f0b4e9c70
3
configure
vendored
3
configure
vendored
@ -240,7 +240,7 @@ External library support:
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--enable-libiec61883 enable iec61883 via libiec61883 [no]
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--enable-libilbc enable iLBC de/encoding via libilbc [no]
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--enable-libjack enable JACK audio sound server [no]
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--enable-libjxl enable JPEG XL decoding via libjxl [no]
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--enable-libjxl enable JPEG XL de/encoding via libjxl [no]
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--enable-libklvanc enable Kernel Labs VANC processing [no]
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--enable-libkvazaar enable HEVC encoding via libkvazaar [no]
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--enable-liblensfun enable lensfun lens correction [no]
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@ -3334,6 +3334,7 @@ libgsm_ms_encoder_deps="libgsm"
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libilbc_decoder_deps="libilbc"
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libilbc_encoder_deps="libilbc"
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libjxl_decoder_deps="libjxl libjxl_threads"
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libjxl_encoder_deps="libjxl libjxl_threads"
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libkvazaar_encoder_deps="libkvazaar"
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libmodplug_demuxer_deps="libmodplug"
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libmp3lame_encoder_deps="libmp3lame"
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@ -1063,6 +1063,7 @@ OBJS-$(CONFIG_LIBGSM_MS_ENCODER) += libgsmenc.o
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OBJS-$(CONFIG_LIBILBC_DECODER) += libilbc.o
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OBJS-$(CONFIG_LIBILBC_ENCODER) += libilbc.o
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OBJS-$(CONFIG_LIBJXL_DECODER) += libjxldec.o libjxl.o
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OBJS-$(CONFIG_LIBJXL_ENCODER) += libjxlenc.o libjxl.o
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OBJS-$(CONFIG_LIBKVAZAAR_ENCODER) += libkvazaar.o
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OBJS-$(CONFIG_LIBMP3LAME_ENCODER) += libmp3lame.o
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OBJS-$(CONFIG_LIBOPENCORE_AMRNB_DECODER) += libopencore-amr.o
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@ -752,6 +752,7 @@ extern const FFCodec ff_libgsm_ms_decoder;
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extern const FFCodec ff_libilbc_encoder;
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extern const FFCodec ff_libilbc_decoder;
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extern const FFCodec ff_libjxl_decoder;
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extern const FFCodec ff_libjxl_encoder;
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extern const FFCodec ff_libmp3lame_encoder;
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extern const FFCodec ff_libopencore_amrnb_encoder;
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extern const FFCodec ff_libopencore_amrnb_decoder;
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384
libavcodec/libjxlenc.c
Normal file
384
libavcodec/libjxlenc.c
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@ -0,0 +1,384 @@
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/*
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* JPEG XL encoding support via libjxl
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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 encoder using libjxl
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*/
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#include <string.h>
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#include "libavutil/avutil.h"
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#include "libavutil/error.h"
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#include "libavutil/frame.h"
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#include "libavutil/libm.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/pixfmt.h"
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#include "libavutil/version.h"
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#include "avcodec.h"
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#include "encode.h"
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#include "codec_internal.h"
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#include <jxl/encode.h>
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#include <jxl/thread_parallel_runner.h>
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#include "libjxl.h"
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typedef struct LibJxlEncodeContext {
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AVClass *class;
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void *runner;
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JxlEncoder *encoder;
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JxlEncoderFrameSettings *options;
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int effort;
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float distance;
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int modular;
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uint8_t *buffer;
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size_t buffer_size;
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} LibJxlEncodeContext;
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/**
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* Map a quality setting for -qscale roughly from libjpeg
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* quality numbers to libjxl's butteraugli distance for
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* photographic content.
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*
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* Setting distance explicitly is preferred, but this will
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* allow qscale to be used as a fallback.
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*
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* This function is continuous and injective on [0, 100] which
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* makes it monotonic.
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*
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* @param quality 0.0 to 100.0 quality setting, libjpeg quality
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* @return Butteraugli distance between 0.0 and 15.0
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*/
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static float quality_to_distance(float quality)
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{
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if (quality >= 100.0)
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return 0.0;
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else if (quality >= 90.0)
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return (100.0 - quality) * 0.10;
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else if (quality >= 30.0)
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return 0.1 + (100.0 - quality) * 0.09;
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else if (quality > 0.0)
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return 15.0 + (59.0 * quality - 4350.0) * quality / 9000.0;
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else
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return 15.0;
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}
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/**
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* Initalize the decoder on a per-frame basis. All of these need to be set
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* once each time the decoder is reset, which it must be each frame to make
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* the image2 muxer work.
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*
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* @return 0 upon success, negative on failure.
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*/
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static int libjxl_init_jxl_encoder(AVCodecContext *avctx)
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{
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LibJxlEncodeContext *ctx = avctx->priv_data;
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/* reset the encoder every frame for image2 muxer */
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JxlEncoderReset(ctx->encoder);
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ctx->options = JxlEncoderFrameSettingsCreate(ctx->encoder, NULL);
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if (!ctx->options) {
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av_log(avctx, AV_LOG_ERROR, "Failed to create JxlEncoderOptions\n");
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return AVERROR_EXTERNAL;
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}
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/* This needs to be set each time the decoder is reset */
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if (JxlEncoderSetParallelRunner(ctx->encoder, JxlThreadParallelRunner, ctx->runner)
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!= JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_ERROR, "Failed to set JxlThreadParallelRunner\n");
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return AVERROR_EXTERNAL;
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}
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/* these shouldn't fail, libjxl bug notwithstanding */
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if (JxlEncoderFrameSettingsSetOption(ctx->options, JXL_ENC_FRAME_SETTING_EFFORT, ctx->effort)
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!= JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_ERROR, "Failed to set effort to: %d\n", ctx->effort);
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return AVERROR_EXTERNAL;
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}
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/* check for negative zero, our default */
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if (ctx->distance < 0.0) {
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/* use ffmpeg.c -q option if passed */
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if (avctx->flags & AV_CODEC_FLAG_QSCALE)
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ctx->distance = quality_to_distance((float)avctx->global_quality / FF_QP2LAMBDA);
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else
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/* default 1.0 matches cjxl */
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ctx->distance = 1.0;
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}
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/*
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* 0.01 is the minimum distance accepted for lossy
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* interpreting any positive value less than this as minimum
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*/
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if (ctx->distance > 0.0 && ctx->distance < 0.01)
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ctx->distance = 0.01;
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if (JxlEncoderOptionsSetDistance(ctx->options, ctx->distance) != JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_ERROR, "Failed to set distance: %f\n", ctx->distance);
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return AVERROR_EXTERNAL;
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}
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/*
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* In theory the library should automatically enable modular if necessary,
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* but it appears it won't at the moment due to a bug. This will still
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* work even if that is patched.
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*/
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if (JxlEncoderFrameSettingsSetOption(ctx->options, JXL_ENC_FRAME_SETTING_MODULAR,
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ctx->modular || ctx->distance <= 0.0 ? 1 : -1) != JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_ERROR, "Failed to set modular\n");
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return AVERROR_EXTERNAL;
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}
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return 0;
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}
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/**
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* Global encoder initialization. This only needs to be run once,
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* not every frame.
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*/
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static av_cold int libjxl_encode_init(AVCodecContext *avctx)
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{
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LibJxlEncodeContext *ctx = avctx->priv_data;
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JxlMemoryManager manager;
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ff_libjxl_init_memory_manager(&manager);
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ctx->encoder = JxlEncoderCreate(&manager);
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if (!ctx->encoder) {
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av_log(avctx, AV_LOG_ERROR, "Failed to create JxlEncoder\n");
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return AVERROR_EXTERNAL;
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}
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ctx->runner = JxlThreadParallelRunnerCreate(&manager, ff_libjxl_get_threadcount(avctx->thread_count));
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if (!ctx->runner) {
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av_log(avctx, AV_LOG_ERROR, "Failed to create JxlThreadParallelRunner\n");
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return AVERROR_EXTERNAL;
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}
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ctx->buffer_size = 4096;
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ctx->buffer = av_realloc(NULL, ctx->buffer_size);
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if (!ctx->buffer) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate encoding buffer\n");
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return AVERROR(ENOMEM);
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}
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return 0;
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}
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/**
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* Encode an entire frame. Currently animation, is not supported by
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* this encoder, so this will always reinitialize a new still image
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* and encode a one-frame image (for image2 and image2pipe).
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*/
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static int libjxl_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
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{
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LibJxlEncodeContext *ctx = avctx->priv_data;
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AVFrameSideData *sd;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(frame->format);
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JxlBasicInfo info;
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JxlColorEncoding jxl_color;
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JxlPixelFormat jxl_fmt;
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JxlEncoderStatus jret;
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int ret;
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size_t available = ctx->buffer_size;
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size_t bytes_written = 0;
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uint8_t *next_out = ctx->buffer;
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ret = libjxl_init_jxl_encoder(avctx);
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if (ret) {
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av_log(avctx, AV_LOG_ERROR, "Error frame-initializing JxlEncoder\n");
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return ret;
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}
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/* populate the basic info settings */
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JxlEncoderInitBasicInfo(&info);
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jxl_fmt.num_channels = pix_desc->nb_components;
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info.xsize = frame->width;
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info.ysize = frame->height;
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info.num_extra_channels = (jxl_fmt.num_channels + 1) % 2;
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info.num_color_channels = jxl_fmt.num_channels - info.num_extra_channels;
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info.bits_per_sample = av_get_bits_per_pixel(pix_desc) / jxl_fmt.num_channels;
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info.alpha_bits = (info.num_extra_channels > 0) * info.bits_per_sample;
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if (pix_desc->flags & AV_PIX_FMT_FLAG_FLOAT) {
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info.exponent_bits_per_sample = info.bits_per_sample > 16 ? 8 : 5;
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info.alpha_exponent_bits = info.alpha_bits ? info.exponent_bits_per_sample : 0;
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jxl_fmt.data_type = info.bits_per_sample > 16 ? JXL_TYPE_FLOAT : JXL_TYPE_FLOAT16;
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JxlColorEncodingSetToLinearSRGB(&jxl_color, info.num_color_channels == 1);
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} else {
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info.exponent_bits_per_sample = 0;
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info.alpha_exponent_bits = 0;
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jxl_fmt.data_type = info.bits_per_sample <= 8 ? JXL_TYPE_UINT8 : JXL_TYPE_UINT16;
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JxlColorEncodingSetToSRGB(&jxl_color, info.num_color_channels == 1);
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}
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if (info.bits_per_sample > 16
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|| info.xsize > (1 << 18) || info.ysize > (1 << 18)
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|| (info.xsize << 4) * (info.ysize << 4) > (1 << 20)) {
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/*
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* must upgrade codestream to level 10, from level 5
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* the encoder will not do this automatically
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*/
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if (JxlEncoderSetCodestreamLevel(ctx->encoder, 10) != JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_ERROR, "Could not upgrade JXL Codestream level.\n");
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return AVERROR_EXTERNAL;
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}
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}
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/* bitexact lossless requires there to be no XYB transform */
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info.uses_original_profile = ctx->distance == 0.0;
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sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
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if (sd && sd->size && JxlEncoderSetICCProfile(ctx->encoder, sd->data, sd->size) != JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_WARNING, "Could not set ICC Profile\n");
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} else if (info.uses_original_profile) {
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/*
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* the color encoding is not used if uses_original_profile is false
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* this just works around a bug in libjxl 0.7.0 and lower
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*/
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if (JxlEncoderSetColorEncoding(ctx->encoder, &jxl_color) != JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_ERROR, "Failed to set JxlColorEncoding\n");
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return AVERROR_EXTERNAL;
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}
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}
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if (JxlEncoderSetBasicInfo(ctx->encoder, &info) != JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_ERROR, "Failed to set JxlBasicInfo\n");
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return AVERROR_EXTERNAL;
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}
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jxl_fmt.endianness = JXL_NATIVE_ENDIAN;
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jxl_fmt.align = frame->linesize[0];
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if (JxlEncoderAddImageFrame(ctx->options, &jxl_fmt, frame->data[0], jxl_fmt.align * info.ysize) != JXL_ENC_SUCCESS) {
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av_log(avctx, AV_LOG_ERROR, "Failed to add Image Frame\n");
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return AVERROR_EXTERNAL;
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}
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/*
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* Run this after the last frame in the image has been passed.
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* TODO support animation
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*/
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JxlEncoderCloseInput(ctx->encoder);
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while (1) {
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jret = JxlEncoderProcessOutput(ctx->encoder, &next_out, &available);
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if (jret == JXL_ENC_ERROR) {
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av_log(avctx, AV_LOG_ERROR, "Unspecified libjxl error occurred\n");
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return AVERROR_EXTERNAL;
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}
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bytes_written = ctx->buffer_size - available;
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/* all data passed has been encoded */
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if (jret == JXL_ENC_SUCCESS)
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break;
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if (jret == JXL_ENC_NEED_MORE_OUTPUT) {
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/*
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* at the moment, libjxl has no way to
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* tell us how much space it actually needs
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* so we need to malloc loop
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*/
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uint8_t *temp;
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size_t new_size = ctx->buffer_size * 2;
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temp = av_realloc(ctx->buffer, new_size);
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if (!temp)
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return AVERROR(ENOMEM);
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ctx->buffer = temp;
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ctx->buffer_size = new_size;
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next_out = ctx->buffer + bytes_written;
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available = new_size - bytes_written;
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continue;
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}
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av_log(avctx, AV_LOG_ERROR, "Bad libjxl event: %d\n", jret);
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return AVERROR_EXTERNAL;
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}
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ret = ff_get_encode_buffer(avctx, pkt, bytes_written, 0);
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if (ret < 0)
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return ret;
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memcpy(pkt->data, ctx->buffer, bytes_written);
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*got_packet = 1;
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return 0;
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}
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static av_cold int libjxl_encode_close(AVCodecContext *avctx)
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{
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LibJxlEncodeContext *ctx = avctx->priv_data;
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if (ctx->runner)
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JxlThreadParallelRunnerDestroy(ctx->runner);
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ctx->runner = NULL;
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/*
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* destroying the decoder also frees
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* ctx->options so we don't need to
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*/
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if (ctx->encoder)
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JxlEncoderDestroy(ctx->encoder);
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ctx->encoder = NULL;
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av_freep(&ctx->buffer);
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return 0;
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}
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#define OFFSET(x) offsetof(LibJxlEncodeContext, x)
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption libjxl_encode_options[] = {
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{ "effort", "Encoding effort", OFFSET(effort), AV_OPT_TYPE_INT, { .i64 = 7 }, 1, 9, VE },
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{ "distance", "Maximum Butteraugli distance (quality setting, "
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"lower = better, zero = lossless, default 1.0)", OFFSET(distance), AV_OPT_TYPE_FLOAT, { .dbl = -1.0 }, -1.0, 15.0, VE },
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{ "modular", "Force modular mode", OFFSET(modular), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
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{ NULL },
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};
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static const AVClass libjxl_encode_class = {
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.class_name = "libjxl",
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.item_name = av_default_item_name,
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.option = libjxl_encode_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const FFCodec ff_libjxl_encoder = {
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.p.name = "libjxl",
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.p.long_name = NULL_IF_CONFIG_SMALL("libjxl JPEG XL"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_JPEGXL,
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.priv_data_size = sizeof(LibJxlEncodeContext),
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.init = libjxl_encode_init,
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FF_CODEC_ENCODE_CB(libjxl_encode_frame),
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.close = libjxl_encode_close,
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.p.capabilities = AV_CODEC_CAP_OTHER_THREADS,
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.caps_internal = FF_CODEC_CAP_AUTO_THREADS | FF_CODEC_CAP_INIT_CLEANUP,
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.p.pix_fmts = (const enum AVPixelFormat[]) {
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AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
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AV_PIX_FMT_RGB48, AV_PIX_FMT_RGBA64,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_YA8,
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||||
AV_PIX_FMT_GRAY16, AV_PIX_FMT_YA16,
|
||||
AV_PIX_FMT_GRAYF32,
|
||||
AV_PIX_FMT_NONE
|
||||
},
|
||||
.p.priv_class = &libjxl_encode_class,
|
||||
.p.wrapper_name = "libjxl",
|
||||
};
|
Loading…
Reference in New Issue
Block a user