[FFmpeg-devel] [PATCH v14 2/4] avcodec/libjxl: add Jpeg XL decoding via libjxl
Andreas Rheinhardt
andreas.rheinhardt at outlook.com
Fri Apr 15 14:08:11 EEST 2022
Leo Izen:
> This commit adds decoding support to libavcodec
> for Jpeg XL images via the external library libjxl.
> ---
> MAINTAINERS | 1 +
> configure | 5 +
> doc/general_contents.texi | 7 +
> libavcodec/Makefile | 1 +
> libavcodec/allcodecs.c | 1 +
> libavcodec/libjxl.c | 70 ++++++++++
> libavcodec/libjxl.h | 48 +++++++
> libavcodec/libjxldec.c | 274 ++++++++++++++++++++++++++++++++++++++
> 8 files changed, 407 insertions(+)
> create mode 100644 libavcodec/libjxl.c
> create mode 100644 libavcodec/libjxl.h
> create mode 100644 libavcodec/libjxldec.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 859a5005d4..faea84ebf1 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -194,6 +194,7 @@ Codecs:
> libcodec2.c Tomas Härdin
> libdirac* David Conrad
> libdavs2.c Huiwen Ren
> + libjxl*.c, libjxl.h Leo Izen
> libgsm.c Michel Bardiaux
> libkvazaar.c Arttu Ylä-Outinen
> libopenh264enc.c Martin Storsjo, Linjie Fu
> diff --git a/configure b/configure
> index 9c8965852b..c36d5dbc8b 100755
> --- a/configure
> +++ b/configure
> @@ -240,6 +240,7 @@ External library support:
> --enable-libiec61883 enable iec61883 via libiec61883 [no]
> --enable-libilbc enable iLBC de/encoding via libilbc [no]
> --enable-libjack enable JACK audio sound server [no]
> + --enable-libjxl enable JPEG XL decoding via libjxl [no]
> --enable-libklvanc enable Kernel Labs VANC processing [no]
> --enable-libkvazaar enable HEVC encoding via libkvazaar [no]
> --enable-liblensfun enable lensfun lens correction [no]
> @@ -1833,6 +1834,7 @@ EXTERNAL_LIBRARY_LIST="
> libiec61883
> libilbc
> libjack
> + libjxl
> libklvanc
> libkvazaar
> libmodplug
> @@ -3331,6 +3333,7 @@ libgsm_ms_decoder_deps="libgsm"
> libgsm_ms_encoder_deps="libgsm"
> libilbc_decoder_deps="libilbc"
> libilbc_encoder_deps="libilbc"
> +libjxl_decoder_deps="libjxl libjxl_threads"
> libkvazaar_encoder_deps="libkvazaar"
> libmodplug_demuxer_deps="libmodplug"
> libmp3lame_encoder_deps="libmp3lame"
> @@ -6543,6 +6546,8 @@ enabled libgsm && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
> check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
> done || die "ERROR: libgsm not found"; }
> enabled libilbc && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc $pthreads_extralibs
> +enabled libjxl && require_pkg_config libjxl "libjxl >= 0.7.0" jxl/decode.h JxlDecoderVersion &&
> + require_pkg_config libjxl_threads "libjxl_threads >= 0.7.0" jxl/thread_parallel_runner.h JxlThreadParallelRunner
> enabled libklvanc && require libklvanc libklvanc/vanc.h klvanc_context_create -lklvanc
> enabled libkvazaar && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
> enabled liblensfun && require_pkg_config liblensfun lensfun lensfun.h lf_db_new
> diff --git a/doc/general_contents.texi b/doc/general_contents.texi
> index 238568f2bb..93a90a5e52 100644
> --- a/doc/general_contents.texi
> +++ b/doc/general_contents.texi
> @@ -171,6 +171,13 @@ Go to @url{https://github.com/TimothyGu/libilbc} and follow the instructions for
> installing the library. Then pass @code{--enable-libilbc} to configure to
> enable it.
>
> + at section libjxl
> +
> +JPEG XL is an image format intended to fully replace legacy JPEG for an extended
> +period of life. See @url{https://jpegxl.info/} for more information, and see
> + at url{https://github.com/libjxl/libjxl} for the library source. You can pass
> + at code{--enable-libjxl} to configure in order enable the libjxl wrapper.
> +
> @section libvpx
>
> FFmpeg can make use of the libvpx library for VP8/VP9 decoding and encoding.
> diff --git a/libavcodec/Makefile b/libavcodec/Makefile
> index 90f46035d9..8fc3b3cc5f 100644
> --- a/libavcodec/Makefile
> +++ b/libavcodec/Makefile
> @@ -1061,6 +1061,7 @@ OBJS-$(CONFIG_LIBGSM_MS_DECODER) += libgsmdec.o
> OBJS-$(CONFIG_LIBGSM_MS_ENCODER) += libgsmenc.o
> OBJS-$(CONFIG_LIBILBC_DECODER) += libilbc.o
> OBJS-$(CONFIG_LIBILBC_ENCODER) += libilbc.o
> +OBJS-$(CONFIG_LIBJXL_DECODER) += libjxldec.o libjxl.o
> OBJS-$(CONFIG_LIBKVAZAAR_ENCODER) += libkvazaar.o
> OBJS-$(CONFIG_LIBMP3LAME_ENCODER) += libmp3lame.o
> OBJS-$(CONFIG_LIBOPENCORE_AMRNB_DECODER) += libopencore-amr.o
> diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
> index 585918da93..07f5bafd27 100644
> --- a/libavcodec/allcodecs.c
> +++ b/libavcodec/allcodecs.c
> @@ -751,6 +751,7 @@ extern const FFCodec ff_libgsm_ms_encoder;
> extern const FFCodec ff_libgsm_ms_decoder;
> extern const FFCodec ff_libilbc_encoder;
> extern const FFCodec ff_libilbc_decoder;
> +extern const FFCodec ff_libjxl_decoder;
> extern const FFCodec ff_libmp3lame_encoder;
> extern const FFCodec ff_libopencore_amrnb_encoder;
> extern const FFCodec ff_libopencore_amrnb_decoder;
> diff --git a/libavcodec/libjxl.c b/libavcodec/libjxl.c
> new file mode 100644
> index 0000000000..204d91d8a8
> --- /dev/null
> +++ b/libavcodec/libjxl.c
> @@ -0,0 +1,70 @@
> +/*
> + * JPEG XL de/encoding via libjxl, common support implementation
> + * Copyright (c) 2021 Leo Izen <leo.izen at gmail.com>
> + *
> + * 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
> + */
> +
> +/**
> + * @file
> + * JPEG XL via libjxl common support implementation
> + */
> +
> +#include "libavutil/cpu.h"
> +#include "libavutil/mem.h"
> +
> +#include <jxl/memory_manager.h>
> +#include "libjxl.h"
> +
> +size_t ff_libjxl_get_threadcount(int threads)
> +{
> + if (threads <= 0)
> + return av_cpu_count();
> + if (threads == 1)
> + return 0;
> + return threads;
> +}
> +
> +/**
> + * Wrapper around av_malloc used as a jpegxl_alloc_func.
> + *
> + * @param opaque opaque pointer for jpegxl_alloc_func, always ignored
> + * @param size Size in bytes for the memory block to be allocated
> + * @return Pointer to the allocated block, or `NULL` if it cannot be allocated
> + */
> +static void *libjxl_av_malloc(void *opaque, size_t size)
> +{
> + return av_malloc(size);
> +}
> +
> +/**
> + * Wrapper around av_free used as a jpegxl_free_func.
> + *
> + * @param opaque opaque pointer for jpegxl_free_func, always ignored
> + * @param address Pointer to the allocated block, to free. `NULL` permitted as a no-op.
> + */
> +static void libjxl_av_free(void *opaque, void *address)
> +{
> + av_free(address);
> +}
> +
> +void ff_libjxl_init_memory_manager(JxlMemoryManager *manager)
> +{
> + manager->opaque = NULL;
> + manager->alloc = &libjxl_av_malloc;
> + manager->free = &libjxl_av_free;
> +}
> diff --git a/libavcodec/libjxl.h b/libavcodec/libjxl.h
> new file mode 100644
> index 0000000000..5387c438fd
> --- /dev/null
> +++ b/libavcodec/libjxl.h
> @@ -0,0 +1,48 @@
> +/*
> + * JPEG XL de/encoding via libjxl, common support header
> + * Copyright (c) 2021 Leo Izen <leo.izen at gmail.com>
> + *
> + * 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
> + */
> +
> +/**
> + * @file
> + * JPEG XL via libjxl common support header
> + */
> +
> +#ifndef AVCODEC_LIBJXL_H
> +#define AVCODEC_LIBJXL_H
> +
> +#include <jxl/memory_manager.h>
> +
> +/**
> + * Transform threadcount in ffmpeg to one used by libjxl.
> + *
> + * @param threads ffmpeg's threads AVOption
> + * @return thread count for libjxl's parallel runner
> + */
> +size_t ff_libjxl_get_threadcount(int threads);
> +
> +/**
> + * Initialize and populate a JxlMemoryManager
> + * with av_malloc() and av_free() so libjxl will use these
> + * functions.
> + * @param manager a pointer to a JxlMemoryManager struct
> + */
> +void ff_libjxl_init_memory_manager(JxlMemoryManager *manager);
> +
> +#endif /* AVCODEC_LIBJXL_H */
> diff --git a/libavcodec/libjxldec.c b/libavcodec/libjxldec.c
> new file mode 100644
> index 0000000000..a7d205b081
> --- /dev/null
> +++ b/libavcodec/libjxldec.c
> @@ -0,0 +1,274 @@
> +/*
> + * JPEG XL decoding support via libjxl
> + * Copyright (c) 2021 Leo Izen <leo.izen at gmail.com>
> + *
> + * 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
> + */
> +
> +/**
> + * @file
> + * JPEG XL decoder using libjxl
> + */
> +
> +#include "libavutil/avassert.h"
> +#include "libavutil/buffer.h"
> +#include "libavutil/common.h"
> +#include "libavutil/error.h"
> +#include "libavutil/mem.h"
> +#include "libavutil/pixdesc.h"
> +#include "libavutil/pixfmt.h"
> +#include "libavutil/frame.h"
> +
> +#include "avcodec.h"
> +#include "codec_internal.h"
> +#include "internal.h"
> +
> +#include <jxl/decode.h>
> +#include <jxl/thread_parallel_runner.h>
> +#include "libjxl.h"
> +
> +typedef struct LibJxlDecodeContext {
> + void *runner;
> + JxlDecoder *decoder;
> + JxlBasicInfo basic_info;
> + JxlPixelFormat jxl_pixfmt;
> + JxlDecoderStatus events;
> + AVBufferRef *iccp;
> +} LibJxlDecodeContext;
> +
> +static int libjxl_init_jxl_decoder(AVCodecContext *avctx)
> +{
> + LibJxlDecodeContext *ctx = avctx->priv_data;
> +
> + ctx->events = JXL_DEC_BASIC_INFO | JXL_DEC_FULL_IMAGE | JXL_DEC_COLOR_ENCODING;
> + if (JxlDecoderSubscribeEvents(ctx->decoder, ctx->events) != JXL_DEC_SUCCESS) {
> + av_log(avctx, AV_LOG_ERROR, "Error subscribing to JXL events\n");
> + return AVERROR_EXTERNAL;
> + }
> +
> + if (JxlDecoderSetParallelRunner(ctx->decoder, JxlThreadParallelRunner, ctx->runner) != JXL_DEC_SUCCESS) {
> + av_log(avctx, AV_LOG_ERROR, "Failed to set JxlThreadParallelRunner\n");
> + return AVERROR_EXTERNAL;
> + }
> +
> + memset(&ctx->basic_info, 0, sizeof(JxlBasicInfo));
> + memset(&ctx->jxl_pixfmt, 0, sizeof(JxlPixelFormat));
> +
> + return 0;
> +}
> +
> +static av_cold int libjxl_decode_init(AVCodecContext *avctx)
> +{
> + LibJxlDecodeContext *ctx = avctx->priv_data;
> + JxlMemoryManager manager;
> +
> + ff_libjxl_init_memory_manager(&manager);
> + ctx->decoder = JxlDecoderCreate(&manager);
> + if (!ctx->decoder) {
> + av_log(avctx, AV_LOG_ERROR, "Failed to create JxlDecoder\n");
> + return AVERROR_EXTERNAL;
> + }
> +
> + ctx->runner = JxlThreadParallelRunnerCreate(&manager, ff_libjxl_get_threadcount(avctx->thread_count));
> + if (!ctx->runner) {
> + av_log(avctx, AV_LOG_ERROR, "Failed to create JxlThreadParallelRunner\n");
> + return AVERROR_EXTERNAL;
> + }
> +
> + return libjxl_init_jxl_decoder(avctx);
> +}
> +
> +static enum AVPixelFormat libjxl_get_pix_fmt(AVCodecContext *avctx, JxlBasicInfo *basic_info, JxlPixelFormat *format)
> +{
> + format->endianness = JXL_NATIVE_ENDIAN;
> + format->num_channels = basic_info->num_color_channels + (basic_info->alpha_bits > 0);
> + /* Gray */
> + if (basic_info->num_color_channels == 1) {
> + if (basic_info->bits_per_sample <= 8) {
> + format->data_type = JXL_TYPE_UINT8;
> + return basic_info->alpha_bits ? AV_PIX_FMT_YA8 : AV_PIX_FMT_GRAY8;
> + }
> + if (basic_info->exponent_bits_per_sample || basic_info->bits_per_sample > 16) {
> + if (basic_info->alpha_bits)
> + return AV_PIX_FMT_NONE;
> + format->data_type = JXL_TYPE_FLOAT;
> + return AV_PIX_FMT_GRAYF32;
> + }
> + format->data_type = JXL_TYPE_UINT16;
> + return basic_info->alpha_bits ? AV_PIX_FMT_YA16 : AV_PIX_FMT_GRAY16;
> + }
> + /* rgb only */
> + /* libjxl only supports packed RGB and gray output at the moment */
> + if (basic_info->num_color_channels == 3) {
> + if (basic_info->bits_per_sample <= 8) {
> + format->data_type = JXL_TYPE_UINT8;
> + return basic_info->alpha_bits ? AV_PIX_FMT_RGBA : AV_PIX_FMT_RGB24;
> + }
> + if (basic_info->bits_per_sample > 16)
> + av_log(avctx, AV_LOG_WARNING, "Downsampling larger integer to 16-bit via libjxl\n");
> + if (basic_info->exponent_bits_per_sample)
> + av_log(avctx, AV_LOG_WARNING, "Downsampling float to 16-bit integer via libjxl\n");
> + format->data_type = JXL_TYPE_UINT16;
> + return basic_info->alpha_bits ? AV_PIX_FMT_RGBA64 : AV_PIX_FMT_RGB48;
> + }
> +
> + return AV_PIX_FMT_NONE;
> +}
> +
> +static int libjxl_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
> +{
> + LibJxlDecodeContext *ctx = avctx->priv_data;
> + uint8_t *buf = avpkt->data;
> + size_t remaining = avpkt->size, iccp_len;
> + JxlDecoderStatus jret;
> + int ret;
> + *got_frame = 0;
> +
> + while (1) {
> +
> + jret = JxlDecoderSetInput(ctx->decoder, buf, remaining);
> +
> + if (jret == JXL_DEC_ERROR) {
> + /* this should never happen here unless there's a bug in libjxl */
> + av_log(avctx, AV_LOG_ERROR, "Unknown libjxl decode error\n");
> + return AVERROR_EXTERNAL;
> + }
> +
> + jret = JxlDecoderProcessInput(ctx->decoder);
> + /*
> + * JxlDecoderReleaseInput returns the number
> + * of bytes remaining to be read, rather than
> + * the number of bytes that it did read
> + */
> + remaining = JxlDecoderReleaseInput(ctx->decoder);
> + buf = avpkt->data + avpkt->size - remaining;
> +
> + switch(jret) {
> + case JXL_DEC_ERROR:
> + av_log(avctx, AV_LOG_ERROR, "Unknown libjxl decode error\n");
> + return AVERROR_INVALIDDATA;
> + case JXL_DEC_NEED_MORE_INPUT:
> + if (remaining == 0) {
> + av_log(avctx, AV_LOG_ERROR, "Unexpected end of JXL codestream\n");
> + return AVERROR_INVALIDDATA;
> + }
> + av_log(avctx, AV_LOG_DEBUG, "NEED_MORE_INPUT event emitted\n");
> + continue;
> + case JXL_DEC_BASIC_INFO:
> + av_log(avctx, AV_LOG_DEBUG, "BASIC_INFO event emitted\n");
> + if (JxlDecoderGetBasicInfo(ctx->decoder, &ctx->basic_info) != JXL_DEC_SUCCESS) {
> + /*
> + * this should never happen
> + * if it does it is likely a libjxl decoder bug
> + */
> + av_log(avctx, AV_LOG_ERROR, "Bad libjxl basic info event\n");
> + return AVERROR_EXTERNAL;
> + }
> + avctx->pix_fmt = libjxl_get_pix_fmt(avctx, &ctx->basic_info, &ctx->jxl_pixfmt);
> + if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
> + av_log(avctx, AV_LOG_ERROR, "Bad libjxl pixel format\n");
> + return AVERROR_EXTERNAL;
> + }
> + ret = ff_set_dimensions(avctx, ctx->basic_info.xsize, ctx->basic_info.ysize);
> + if (ret < 0)
> + return ret;
> + continue;
> + case JXL_DEC_COLOR_ENCODING:
> + av_log(avctx, AV_LOG_DEBUG, "COLOR_ENCODING event emitted\n");
> + jret = JxlDecoderGetICCProfileSize(ctx->decoder, &ctx->jxl_pixfmt, JXL_COLOR_PROFILE_TARGET_ORIGINAL, &iccp_len);
> + if (jret == JXL_DEC_SUCCESS && iccp_len > 0) {
> + av_buffer_unref(&ctx->iccp);
> + ctx->iccp = av_buffer_alloc(iccp_len);
> + if (!ctx->iccp)
> + return AVERROR(ENOMEM);
> + jret = JxlDecoderGetColorAsICCProfile(ctx->decoder, &ctx->jxl_pixfmt, JXL_COLOR_PROFILE_TARGET_ORIGINAL, ctx->iccp->data, iccp_len);
> + if (jret != JXL_DEC_SUCCESS)
> + av_buffer_unref(&ctx->iccp);
> + }
> + continue;
> + case JXL_DEC_NEED_IMAGE_OUT_BUFFER:
> + av_log(avctx, AV_LOG_DEBUG, "NEED_IMAGE_OUT_BUFFER event emitted\n");
> + ret = ff_get_buffer(avctx, frame, 0);
> + if (ret < 0)
> + return ret;
> + ctx->jxl_pixfmt.align = frame->linesize[0];
> + if (JxlDecoderSetImageOutBuffer(ctx->decoder, &ctx->jxl_pixfmt, frame->data[0], frame->buf[0]->size) != JXL_DEC_SUCCESS) {
> + av_log(avctx, AV_LOG_ERROR, "Bad libjxl dec need image out buffer event\n");
> + return AVERROR_EXTERNAL;
> + }
> + continue;
> + case JXL_DEC_FULL_IMAGE:
> + /* full image is one frame, even if animated */
> + av_log(avctx, AV_LOG_DEBUG, "FULL_IMAGE event emitted\n");
> + *got_frame = 1;
Only set this after you know that you return successfully (i.e. after
the av_frame_new_side_data_from_buf()).
> + frame->pict_type = AV_PICTURE_TYPE_I;
> + frame->key_frame = 1;
> + if (ctx->iccp) {
> + AVFrameSideData *sd = av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_ICC_PROFILE, ctx->iccp);
> + if (!sd)
> + return AVERROR(ENOMEM);
> + /* ownership is transfered, and it is not ref-ed */
> + ctx->iccp = NULL;
> + }
> + return avpkt->size - remaining;
If this decoder is supposed to produce multiple frames from one packet
of input, it needs to use the receive_frame-callback. For video
decoders, it is only checked whether the return value is >= 0 or not
(see lines 451-456 in decode.c).
> + case JXL_DEC_SUCCESS:
> + av_log(avctx, AV_LOG_DEBUG, "SUCCESS event emitted\n");
> + /*
> + * The file has finished decoding
> + * reset the decoder to let us
> + * reuse it again for the next image
> + */
> + JxlDecoderReset(ctx->decoder);
> + libjxl_init_jxl_decoder(avctx);
You are only resetting the decoder on success. What happens if any of
the errors happened? Would the decoder need to be reset before decoding
the next picture?
> + buf = avpkt->data;
> + remaining = avpkt->size;
> + continue;
Didn't you already feed this data to the decoder? This somehow looks
like a recipe for an infinite loop.
> + default:
> + av_log(avctx, AV_LOG_ERROR, "Bad libjxl event: %d\n", jret);
> + return AVERROR_EXTERNAL;
> + }
> + }
> +}
> +
> +static av_cold int libjxl_decode_close(AVCodecContext *avctx)
> +{
> + LibJxlDecodeContext *ctx = avctx->priv_data;
> +
> + if (ctx->runner)
> + JxlThreadParallelRunnerDestroy(ctx->runner);
> + ctx->runner = NULL;
> + if (ctx->decoder)
> + JxlDecoderDestroy(ctx->decoder);
> + ctx->decoder = NULL;
> + av_buffer_unref(&ctx->iccp);
> +
> + return 0;
> +}
> +
> +const FFCodec ff_libjxl_decoder = {
> + .p.name = "libjxl",
> + .p.long_name = NULL_IF_CONFIG_SMALL("libjxl JPEG XL"),
> + .p.type = AVMEDIA_TYPE_VIDEO,
> + .p.id = AV_CODEC_ID_JPEGXL,
> + .priv_data_size = sizeof(LibJxlDecodeContext),
> + .init = libjxl_decode_init,
> + FF_CODEC_DECODE_CB(libjxl_decode_frame),
> + .close = libjxl_decode_close,
> + .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_OTHER_THREADS,
> + .caps_internal = FF_CODEC_CAP_AUTO_THREADS | FF_CODEC_CAP_INIT_CLEANUP,
> + .p.wrapper_name = "libjxl",
> +};
- Andreas
PS: I apologize in advance if any of the above points has already been
raised and shown to be non-issues.
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