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FFmpeg/libavcodec/libdav1d.c
James Almer 3e186148ca avcodec/libdav1d: don't depend on the event flags API to init sequence params the first time 
A bug was found in dav1d <= 1.0.0 where the event flag New Sequence Header would
not be signaled for some samples using delayed random access points.
It has since been fixed, but nonetheless it's best to ensure the AVCodecContext
is filled with parameters when parsing the first frame, regardless of what events
were signaled.

Fixes ticket #9694.

Signed-off-by: James Almer <jamrial@gmail.com>
2022-04-07 15:28:50 -03:00

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/*
* Copyright (c) 2018 Ronald S. Bultje <rsbultje gmail com>
* Copyright (c) 2018 James Almer <jamrial 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
*/
#include <dav1d/dav1d.h>
#include "libavutil/avassert.h"
#include "libavutil/cpu.h"
#include "libavutil/film_grain_params.h"
#include "libavutil/mastering_display_metadata.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "atsc_a53.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "internal.h"
#define FF_DAV1D_VERSION_AT_LEAST(x,y) \
(DAV1D_API_VERSION_MAJOR > (x) || DAV1D_API_VERSION_MAJOR == (x) && DAV1D_API_VERSION_MINOR >= (y))
typedef struct Libdav1dContext {
AVClass *class;
Dav1dContext *c;
/* This packet coincides with AVCodecInternal.in_pkt
* and is not owned by us. */
AVPacket *pkt;
AVBufferPool *pool;
int pool_size;
Dav1dData data;
int tile_threads;
int frame_threads;
int apply_grain;
int operating_point;
int all_layers;
} Libdav1dContext;
static const enum AVPixelFormat pix_fmt[][3] = {
[DAV1D_PIXEL_LAYOUT_I400] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12 },
[DAV1D_PIXEL_LAYOUT_I420] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12 },
[DAV1D_PIXEL_LAYOUT_I422] = { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12 },
[DAV1D_PIXEL_LAYOUT_I444] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12 },
};
static const enum AVPixelFormat pix_fmt_rgb[3] = {
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
};
static void libdav1d_log_callback(void *opaque, const char *fmt, va_list vl)
{
AVCodecContext *c = opaque;
av_vlog(c, AV_LOG_ERROR, fmt, vl);
}
static int libdav1d_picture_allocator(Dav1dPicture *p, void *cookie)
{
Libdav1dContext *dav1d = cookie;
enum AVPixelFormat format = pix_fmt[p->p.layout][p->seq_hdr->hbd];
int ret, linesize[4], h = FFALIGN(p->p.h, 128), w = FFALIGN(p->p.w, 128);
uint8_t *aligned_ptr, *data[4];
AVBufferRef *buf;
ret = av_image_get_buffer_size(format, w, h, DAV1D_PICTURE_ALIGNMENT);
if (ret < 0)
return ret;
if (ret != dav1d->pool_size) {
av_buffer_pool_uninit(&dav1d->pool);
// Use twice the amount of required padding bytes for aligned_ptr below.
dav1d->pool = av_buffer_pool_init(ret + DAV1D_PICTURE_ALIGNMENT * 2, NULL);
if (!dav1d->pool) {
dav1d->pool_size = 0;
return AVERROR(ENOMEM);
}
dav1d->pool_size = ret;
}
buf = av_buffer_pool_get(dav1d->pool);
if (!buf)
return AVERROR(ENOMEM);
// libdav1d requires DAV1D_PICTURE_ALIGNMENT aligned buffers, which av_malloc()
// doesn't guarantee for example when AVX is disabled at configure time.
// Use the extra DAV1D_PICTURE_ALIGNMENT padding bytes in the buffer to align it
// if required.
aligned_ptr = (uint8_t *)FFALIGN((uintptr_t)buf->data, DAV1D_PICTURE_ALIGNMENT);
ret = av_image_fill_arrays(data, linesize, aligned_ptr, format, w, h,
DAV1D_PICTURE_ALIGNMENT);
if (ret < 0) {
av_buffer_unref(&buf);
return ret;
}
p->data[0] = data[0];
p->data[1] = data[1];
p->data[2] = data[2];
p->stride[0] = linesize[0];
p->stride[1] = linesize[1];
p->allocator_data = buf;
return 0;
}
static void libdav1d_picture_release(Dav1dPicture *p, void *cookie)
{
AVBufferRef *buf = p->allocator_data;
av_buffer_unref(&buf);
}
static void libdav1d_init_params(AVCodecContext *c, const Dav1dSequenceHeader *seq)
{
c->profile = seq->profile;
c->level = ((seq->operating_points[0].major_level - 2) << 2)
| seq->operating_points[0].minor_level;
switch (seq->chr) {
case DAV1D_CHR_VERTICAL:
c->chroma_sample_location = AVCHROMA_LOC_LEFT;
break;
case DAV1D_CHR_COLOCATED:
c->chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
break;
}
c->colorspace = (enum AVColorSpace) seq->mtrx;
c->color_primaries = (enum AVColorPrimaries) seq->pri;
c->color_trc = (enum AVColorTransferCharacteristic) seq->trc;
c->color_range = seq->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
if (seq->layout == DAV1D_PIXEL_LAYOUT_I444 &&
seq->mtrx == DAV1D_MC_IDENTITY &&
seq->pri == DAV1D_COLOR_PRI_BT709 &&
seq->trc == DAV1D_TRC_SRGB)
c->pix_fmt = pix_fmt_rgb[seq->hbd];
else
c->pix_fmt = pix_fmt[seq->layout][seq->hbd];
if (seq->num_units_in_tick && seq->time_scale) {
av_reduce(&c->framerate.den, &c->framerate.num,
seq->num_units_in_tick, seq->time_scale, INT_MAX);
if (seq->equal_picture_interval)
c->ticks_per_frame = seq->num_ticks_per_picture;
}
if (seq->film_grain_present)
c->properties |= FF_CODEC_PROPERTY_FILM_GRAIN;
else
c->properties &= ~FF_CODEC_PROPERTY_FILM_GRAIN;
}
static av_cold int libdav1d_parse_extradata(AVCodecContext *c)
{
Dav1dSequenceHeader seq;
size_t offset = 0;
int res;
if (!c->extradata || c->extradata_size <= 0)
return 0;
if (c->extradata[0] & 0x80) {
int version = c->extradata[0] & 0x7F;
if (version != 1 || c->extradata_size < 4) {
int explode = !!(c->err_recognition & AV_EF_EXPLODE);
av_log(c, explode ? AV_LOG_ERROR : AV_LOG_WARNING,
"Error decoding extradata\n");
return explode ? AVERROR_INVALIDDATA : 0;
}
// Do nothing if there are no configOBUs to parse
if (c->extradata_size == 4)
return 0;
offset = 4;
}
res = dav1d_parse_sequence_header(&seq, c->extradata + offset,
c->extradata_size - offset);
if (res < 0)
return 0; // Assume no seqhdr OBUs are present
libdav1d_init_params(c, &seq);
res = ff_set_dimensions(c, seq.max_width, seq.max_height);
if (res < 0)
return res;
return 0;
}
static av_cold int libdav1d_init(AVCodecContext *c)
{
Libdav1dContext *dav1d = c->priv_data;
Dav1dSettings s;
#if FF_DAV1D_VERSION_AT_LEAST(6,0)
int threads = c->thread_count;
#else
int threads = (c->thread_count ? c->thread_count : av_cpu_count()) * 3 / 2;
#endif
int res;
dav1d->pkt = c->internal->in_pkt;
av_log(c, AV_LOG_INFO, "libdav1d %s\n", dav1d_version());
dav1d_default_settings(&s);
s.logger.cookie = c;
s.logger.callback = libdav1d_log_callback;
s.allocator.cookie = dav1d;
s.allocator.alloc_picture_callback = libdav1d_picture_allocator;
s.allocator.release_picture_callback = libdav1d_picture_release;
s.frame_size_limit = c->max_pixels;
if (dav1d->apply_grain >= 0)
s.apply_grain = dav1d->apply_grain;
else
s.apply_grain = !(c->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN);
s.all_layers = dav1d->all_layers;
if (dav1d->operating_point >= 0)
s.operating_point = dav1d->operating_point;
#if FF_DAV1D_VERSION_AT_LEAST(6,2)
s.strict_std_compliance = c->strict_std_compliance > 0;
#endif
#if FF_DAV1D_VERSION_AT_LEAST(6,0)
if (dav1d->frame_threads || dav1d->tile_threads)
s.n_threads = FFMAX(dav1d->frame_threads, dav1d->tile_threads);
else
s.n_threads = FFMIN(threads, DAV1D_MAX_THREADS);
s.max_frame_delay = (c->flags & AV_CODEC_FLAG_LOW_DELAY) ? 1 : 0;
av_log(c, AV_LOG_DEBUG, "Using %d threads, %d max_frame_delay\n",
s.n_threads, s.max_frame_delay);
#else
s.n_tile_threads = dav1d->tile_threads
? dav1d->tile_threads
: FFMIN(floor(sqrt(threads)), DAV1D_MAX_TILE_THREADS);
s.n_frame_threads = dav1d->frame_threads
? dav1d->frame_threads
: FFMIN(ceil(threads / s.n_tile_threads), DAV1D_MAX_FRAME_THREADS);
av_log(c, AV_LOG_DEBUG, "Using %d frame threads, %d tile threads\n",
s.n_frame_threads, s.n_tile_threads);
#endif
res = libdav1d_parse_extradata(c);
if (res < 0)
return res;
res = dav1d_open(&dav1d->c, &s);
if (res < 0)
return AVERROR(ENOMEM);
return 0;
}
static void libdav1d_flush(AVCodecContext *c)
{
Libdav1dContext *dav1d = c->priv_data;
dav1d_data_unref(&dav1d->data);
dav1d_flush(dav1d->c);
}
static void libdav1d_data_free(const uint8_t *data, void *opaque) {
AVBufferRef *buf = opaque;
av_buffer_unref(&buf);
}
static void libdav1d_user_data_free(const uint8_t *data, void *opaque) {
av_assert0(data == opaque);
av_free(opaque);
}
static int libdav1d_receive_frame(AVCodecContext *c, AVFrame *frame)
{
Libdav1dContext *dav1d = c->priv_data;
Dav1dData *data = &dav1d->data;
Dav1dPicture pic = { 0 }, *p = &pic;
#if FF_DAV1D_VERSION_AT_LEAST(5,1)
enum Dav1dEventFlags event_flags = 0;
#endif
int res;
if (!data->sz) {
AVPacket *const pkt = dav1d->pkt;
res = ff_decode_get_packet(c, pkt);
if (res < 0 && res != AVERROR_EOF)
return res;
if (pkt->size) {
res = dav1d_data_wrap(data, pkt->data, pkt->size,
libdav1d_data_free, pkt->buf);
if (res < 0) {
av_packet_unref(pkt);
return res;
}
data->m.timestamp = pkt->pts;
data->m.offset = pkt->pos;
data->m.duration = pkt->duration;
pkt->buf = NULL;
av_packet_unref(pkt);
if (c->reordered_opaque != AV_NOPTS_VALUE) {
uint8_t *reordered_opaque = av_memdup(&c->reordered_opaque,
sizeof(c->reordered_opaque));
if (!reordered_opaque) {
dav1d_data_unref(data);
return AVERROR(ENOMEM);
}
res = dav1d_data_wrap_user_data(data, reordered_opaque,
libdav1d_user_data_free, reordered_opaque);
if (res < 0) {
av_free(reordered_opaque);
dav1d_data_unref(data);
return res;
}
}
} else if (res >= 0) {
av_packet_unref(pkt);
return AVERROR(EAGAIN);
}
}
res = dav1d_send_data(dav1d->c, data);
if (res < 0) {
if (res == AVERROR(EINVAL))
res = AVERROR_INVALIDDATA;
if (res != AVERROR(EAGAIN)) {
dav1d_data_unref(data);
return res;
}
}
res = dav1d_get_picture(dav1d->c, p);
if (res < 0) {
if (res == AVERROR(EINVAL))
res = AVERROR_INVALIDDATA;
else if (res == AVERROR(EAGAIN) && c->internal->draining)
res = AVERROR_EOF;
return res;
}
av_assert0(p->data[0] && p->allocator_data);
// This requires the custom allocator above
frame->buf[0] = av_buffer_ref(p->allocator_data);
if (!frame->buf[0]) {
dav1d_picture_unref(p);
return AVERROR(ENOMEM);
}
frame->data[0] = p->data[0];
frame->data[1] = p->data[1];
frame->data[2] = p->data[2];
frame->linesize[0] = p->stride[0];
frame->linesize[1] = p->stride[1];
frame->linesize[2] = p->stride[1];
#if FF_DAV1D_VERSION_AT_LEAST(5,1)
dav1d_get_event_flags(dav1d->c, &event_flags);
if (c->pix_fmt == AV_PIX_FMT_NONE ||
event_flags & DAV1D_EVENT_FLAG_NEW_SEQUENCE)
#endif
libdav1d_init_params(c, p->seq_hdr);
res = ff_decode_frame_props(c, frame);
if (res < 0)
goto fail;
frame->width = p->p.w;
frame->height = p->p.h;
if (c->width != p->p.w || c->height != p->p.h) {
res = ff_set_dimensions(c, p->p.w, p->p.h);
if (res < 0)
goto fail;
}
av_reduce(&frame->sample_aspect_ratio.num,
&frame->sample_aspect_ratio.den,
frame->height * (int64_t)p->frame_hdr->render_width,
frame->width * (int64_t)p->frame_hdr->render_height,
INT_MAX);
ff_set_sar(c, frame->sample_aspect_ratio);
if (p->m.user_data.data)
memcpy(&frame->reordered_opaque, p->m.user_data.data, sizeof(frame->reordered_opaque));
else
frame->reordered_opaque = AV_NOPTS_VALUE;
// match timestamps and packet size
frame->pts = p->m.timestamp;
frame->pkt_dts = p->m.timestamp;
frame->pkt_pos = p->m.offset;
frame->pkt_size = p->m.size;
frame->pkt_duration = p->m.duration;
frame->key_frame = p->frame_hdr->frame_type == DAV1D_FRAME_TYPE_KEY;
switch (p->frame_hdr->frame_type) {
case DAV1D_FRAME_TYPE_KEY:
case DAV1D_FRAME_TYPE_INTRA:
frame->pict_type = AV_PICTURE_TYPE_I;
break;
case DAV1D_FRAME_TYPE_INTER:
frame->pict_type = AV_PICTURE_TYPE_P;
break;
case DAV1D_FRAME_TYPE_SWITCH:
frame->pict_type = AV_PICTURE_TYPE_SP;
break;
default:
res = AVERROR_INVALIDDATA;
goto fail;
}
if (p->mastering_display) {
AVMasteringDisplayMetadata *mastering = av_mastering_display_metadata_create_side_data(frame);
if (!mastering) {
res = AVERROR(ENOMEM);
goto fail;
}
for (int i = 0; i < 3; i++) {
mastering->display_primaries[i][0] = av_make_q(p->mastering_display->primaries[i][0], 1 << 16);
mastering->display_primaries[i][1] = av_make_q(p->mastering_display->primaries[i][1], 1 << 16);
}
mastering->white_point[0] = av_make_q(p->mastering_display->white_point[0], 1 << 16);
mastering->white_point[1] = av_make_q(p->mastering_display->white_point[1], 1 << 16);
mastering->max_luminance = av_make_q(p->mastering_display->max_luminance, 1 << 8);
mastering->min_luminance = av_make_q(p->mastering_display->min_luminance, 1 << 14);
mastering->has_primaries = 1;
mastering->has_luminance = 1;
}
if (p->content_light) {
AVContentLightMetadata *light = av_content_light_metadata_create_side_data(frame);
if (!light) {
res = AVERROR(ENOMEM);
goto fail;
}
light->MaxCLL = p->content_light->max_content_light_level;
light->MaxFALL = p->content_light->max_frame_average_light_level;
}
if (p->itut_t35) {
GetByteContext gb;
unsigned int user_identifier;
bytestream2_init(&gb, p->itut_t35->payload, p->itut_t35->payload_size);
bytestream2_skip(&gb, 1); // terminal provider code
bytestream2_skip(&gb, 1); // terminal provider oriented code
user_identifier = bytestream2_get_be32(&gb);
switch (user_identifier) {
case MKBETAG('G', 'A', '9', '4'): { // closed captions
AVBufferRef *buf = NULL;
res = ff_parse_a53_cc(&buf, gb.buffer, bytestream2_get_bytes_left(&gb));
if (res < 0)
goto fail;
if (!res)
break;
if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_A53_CC, buf))
av_buffer_unref(&buf);
c->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
break;
}
default: // ignore unsupported identifiers
break;
}
}
if (p->frame_hdr->film_grain.present && (!dav1d->apply_grain ||
(c->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN))) {
AVFilmGrainParams *fgp = av_film_grain_params_create_side_data(frame);
if (!fgp) {
res = AVERROR(ENOMEM);
goto fail;
}
fgp->type = AV_FILM_GRAIN_PARAMS_AV1;
fgp->seed = p->frame_hdr->film_grain.data.seed;
fgp->codec.aom.num_y_points = p->frame_hdr->film_grain.data.num_y_points;
fgp->codec.aom.chroma_scaling_from_luma = p->frame_hdr->film_grain.data.chroma_scaling_from_luma;
fgp->codec.aom.scaling_shift = p->frame_hdr->film_grain.data.scaling_shift;
fgp->codec.aom.ar_coeff_lag = p->frame_hdr->film_grain.data.ar_coeff_lag;
fgp->codec.aom.ar_coeff_shift = p->frame_hdr->film_grain.data.ar_coeff_shift;
fgp->codec.aom.grain_scale_shift = p->frame_hdr->film_grain.data.grain_scale_shift;
fgp->codec.aom.overlap_flag = p->frame_hdr->film_grain.data.overlap_flag;
fgp->codec.aom.limit_output_range = p->frame_hdr->film_grain.data.clip_to_restricted_range;
memcpy(&fgp->codec.aom.y_points, &p->frame_hdr->film_grain.data.y_points,
sizeof(fgp->codec.aom.y_points));
memcpy(&fgp->codec.aom.num_uv_points, &p->frame_hdr->film_grain.data.num_uv_points,
sizeof(fgp->codec.aom.num_uv_points));
memcpy(&fgp->codec.aom.uv_points, &p->frame_hdr->film_grain.data.uv_points,
sizeof(fgp->codec.aom.uv_points));
memcpy(&fgp->codec.aom.ar_coeffs_y, &p->frame_hdr->film_grain.data.ar_coeffs_y,
sizeof(fgp->codec.aom.ar_coeffs_y));
memcpy(&fgp->codec.aom.ar_coeffs_uv[0], &p->frame_hdr->film_grain.data.ar_coeffs_uv[0],
sizeof(fgp->codec.aom.ar_coeffs_uv[0]));
memcpy(&fgp->codec.aom.ar_coeffs_uv[1], &p->frame_hdr->film_grain.data.ar_coeffs_uv[1],
sizeof(fgp->codec.aom.ar_coeffs_uv[1]));
memcpy(&fgp->codec.aom.uv_mult, &p->frame_hdr->film_grain.data.uv_mult,
sizeof(fgp->codec.aom.uv_mult));
memcpy(&fgp->codec.aom.uv_mult_luma, &p->frame_hdr->film_grain.data.uv_luma_mult,
sizeof(fgp->codec.aom.uv_mult_luma));
memcpy(&fgp->codec.aom.uv_offset, &p->frame_hdr->film_grain.data.uv_offset,
sizeof(fgp->codec.aom.uv_offset));
}
res = 0;
fail:
dav1d_picture_unref(p);
if (res < 0)
av_frame_unref(frame);
return res;
}
static av_cold int libdav1d_close(AVCodecContext *c)
{
Libdav1dContext *dav1d = c->priv_data;
av_buffer_pool_uninit(&dav1d->pool);
dav1d_data_unref(&dav1d->data);
dav1d_close(&dav1d->c);
return 0;
}
#ifndef DAV1D_MAX_FRAME_THREADS
#define DAV1D_MAX_FRAME_THREADS DAV1D_MAX_THREADS
#endif
#ifndef DAV1D_MAX_TILE_THREADS
#define DAV1D_MAX_TILE_THREADS DAV1D_MAX_THREADS
#endif
#define OFFSET(x) offsetof(Libdav1dContext, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption libdav1d_options[] = {
{ "tilethreads", "Tile threads", OFFSET(tile_threads), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, DAV1D_MAX_TILE_THREADS, VD | AV_OPT_FLAG_DEPRECATED },
{ "framethreads", "Frame threads", OFFSET(frame_threads), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, DAV1D_MAX_FRAME_THREADS, VD | AV_OPT_FLAG_DEPRECATED },
{ "filmgrain", "Apply Film Grain", OFFSET(apply_grain), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD | AV_OPT_FLAG_DEPRECATED },
{ "oppoint", "Select an operating point of the scalable bitstream", OFFSET(operating_point), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 31, VD },
{ "alllayers", "Output all spatial layers", OFFSET(all_layers), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
{ NULL }
};
static const AVClass libdav1d_class = {
.class_name = "libdav1d decoder",
.item_name = av_default_item_name,
.option = libdav1d_options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_libdav1d_decoder = {
.p.name = "libdav1d",
.p.long_name = NULL_IF_CONFIG_SMALL("dav1d AV1 decoder by VideoLAN"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_AV1,
.priv_data_size = sizeof(Libdav1dContext),
.init = libdav1d_init,
.close = libdav1d_close,
.flush = libdav1d_flush,
FF_CODEC_RECEIVE_FRAME_CB(libdav1d_receive_frame),
.p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_SETS_PKT_DTS |
FF_CODEC_CAP_AUTO_THREADS,
.p.priv_class = &libdav1d_class,
.p.wrapper_name = "libdav1d",
};
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