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librempeg/libavformat/wavenc.c
Carl Eugen Hoyos 2608f11863 lavf/wav: Print an error if files >4G are written. 
Additionally, don't write an incorrect shorter size for such files.

Fixes part of ticket #4543.
2015-05-17 02:08:58 +02:00

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/*
* WAV muxer
* Copyright (c) 2001, 2002 Fabrice Bellard
*
* Sony Wave64 muxer
* Copyright (c) 2012 Paul B Mahol
*
* WAV muxer RF64 support
* Copyright (c) 2013 Daniel Verkamp <daniel@drv.nu>
*
* EBU Tech 3285 - Supplement 3 - Peak Envelope Chunk encoder
* Copyright (c) 2014 Georg Lippitsch <georg.lippitsch@gmx.at>
*
* 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 <stdint.h>
#include <string.h>
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "avio.h"
#include "avio_internal.h"
#include "internal.h"
#include "riff.h"
#define RF64_AUTO (-1)
#define RF64_NEVER 0
#define RF64_ALWAYS 1
#define PEAK_BUFFER_SIZE 1024
typedef enum {
PEAK_OFF = 0,
PEAK_ON,
PEAK_ONLY
} PeakType;
typedef enum {
PEAK_FORMAT_UINT8 = 1,
PEAK_FORMAT_UINT16
} PeakFormat;
typedef struct WAVMuxContext {
const AVClass *class;
int64_t data;
int64_t fact_pos;
int64_t ds64;
int64_t minpts;
int64_t maxpts;
int16_t *peak_maxpos, *peak_maxneg;
uint32_t peak_num_frames;
uint32_t peak_outbuf_size;
uint32_t peak_outbuf_bytes;
uint32_t peak_pos_pop;
uint16_t peak_pop;
uint8_t *peak_output;
int last_duration;
int write_bext;
int write_peak;
int rf64;
int peak_block_size;
int peak_format;
int peak_block_pos;
int peak_ppv;
int peak_bps;
} WAVMuxContext;
#if CONFIG_WAV_MUXER
static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen)
{
AVDictionaryEntry *tag;
size_t len = 0;
if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
len = strlen(tag->value);
len = FFMIN(len, maxlen);
avio_write(s->pb, tag->value, len);
}
ffio_fill(s->pb, 0, maxlen - len);
}
static void bwf_write_bext_chunk(AVFormatContext *s)
{
AVDictionaryEntry *tmp_tag;
uint64_t time_reference = 0;
int64_t bext = ff_start_tag(s->pb, "bext");
bwf_write_bext_string(s, "description", 256);
bwf_write_bext_string(s, "originator", 32);
bwf_write_bext_string(s, "originator_reference", 32);
bwf_write_bext_string(s, "origination_date", 10);
bwf_write_bext_string(s, "origination_time", 8);
if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0))
time_reference = strtoll(tmp_tag->value, NULL, 10);
avio_wl64(s->pb, time_reference);
avio_wl16(s->pb, 1); // set version to 1
if ((tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) && strlen(tmp_tag->value) > 2) {
unsigned char umidpart_str[17] = {0};
int64_t i;
uint64_t umidpart;
size_t len = strlen(tmp_tag->value+2);
for (i = 0; i < len/16; i++) {
memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16);
umidpart = strtoll(umidpart_str, NULL, 16);
avio_wb64(s->pb, umidpart);
}
ffio_fill(s->pb, 0, 64 - i*8);
} else
ffio_fill(s->pb, 0, 64); // zero UMID
ffio_fill(s->pb, 0, 190); // Reserved
if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0))
avio_put_str(s->pb, tmp_tag->value);
ff_end_tag(s->pb, bext);
}
static av_cold void peak_free_buffers(AVFormatContext *s)
{
WAVMuxContext *wav = s->priv_data;
av_freep(&wav->peak_maxpos);
av_freep(&wav->peak_maxneg);
av_freep(&wav->peak_output);
}
static av_cold int peak_init_writer(AVFormatContext *s)
{
WAVMuxContext *wav = s->priv_data;
AVCodecContext *enc = s->streams[0]->codec;
if (enc->codec_id != AV_CODEC_ID_PCM_S8 &&
enc->codec_id != AV_CODEC_ID_PCM_S16LE &&
enc->codec_id != AV_CODEC_ID_PCM_U8 &&
enc->codec_id != AV_CODEC_ID_PCM_U16LE) {
av_log(s, AV_LOG_ERROR, "%s codec not supported for Peak Chunk\n",
s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
return -1;
}
wav->peak_bps = av_get_bits_per_sample(enc->codec_id) / 8;
if (wav->peak_bps == 1 && wav->peak_format == PEAK_FORMAT_UINT16) {
av_log(s, AV_LOG_ERROR,
"Writing 16 bit peak for 8 bit audio does not make sense\n");
return AVERROR(EINVAL);
}
wav->peak_maxpos = av_mallocz_array(enc->channels, sizeof(*wav->peak_maxpos));
wav->peak_maxneg = av_mallocz_array(enc->channels, sizeof(*wav->peak_maxneg));
wav->peak_output = av_malloc(PEAK_BUFFER_SIZE);
if (!wav->peak_maxpos || !wav->peak_maxneg || !wav->peak_output)
goto nomem;
wav->peak_outbuf_size = PEAK_BUFFER_SIZE;
return 0;
nomem:
av_log(s, AV_LOG_ERROR, "Out of memory\n");
peak_free_buffers(s);
return AVERROR(ENOMEM);
}
static void peak_write_frame(AVFormatContext *s)
{
WAVMuxContext *wav = s->priv_data;
AVCodecContext *enc = s->streams[0]->codec;
int peak_of_peaks;
int c;
if (!wav->peak_output)
return;
for (c = 0; c < enc->channels; c++) {
wav->peak_maxneg[c] = -wav->peak_maxneg[c];
if (wav->peak_bps == 2 && wav->peak_format == PEAK_FORMAT_UINT8) {
wav->peak_maxpos[c] = wav->peak_maxpos[c] / 256;
wav->peak_maxneg[c] = wav->peak_maxneg[c] / 256;
}
if (wav->peak_ppv == 1)
wav->peak_maxpos[c] =
FFMAX(wav->peak_maxpos[c], wav->peak_maxneg[c]);
peak_of_peaks = FFMAX3(wav->peak_maxpos[c], wav->peak_maxneg[c],
wav->peak_pop);
if (peak_of_peaks > wav->peak_pop)
wav->peak_pos_pop = wav->peak_num_frames;
wav->peak_pop = peak_of_peaks;
if (wav->peak_outbuf_size - wav->peak_outbuf_bytes <
wav->peak_format * wav->peak_ppv) {
wav->peak_outbuf_size += PEAK_BUFFER_SIZE;
wav->peak_output = av_realloc(wav->peak_output,
wav->peak_outbuf_size);
if (!wav->peak_output) {
av_log(s, AV_LOG_ERROR, "No memory for peak data\n");
return;
}
}
if (wav->peak_format == PEAK_FORMAT_UINT8) {
wav->peak_output[wav->peak_outbuf_bytes++] =
wav->peak_maxpos[c];
if (wav->peak_ppv == 2) {
wav->peak_output[wav->peak_outbuf_bytes++] =
wav->peak_maxneg[c];
}
} else {
AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
wav->peak_maxpos[c]);
wav->peak_outbuf_bytes += 2;
if (wav->peak_ppv == 2) {
AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
wav->peak_maxneg[c]);
wav->peak_outbuf_bytes += 2;
}
}
wav->peak_maxpos[c] = 0;
wav->peak_maxneg[c] = 0;
}
wav->peak_num_frames++;
}
static int peak_write_chunk(AVFormatContext *s)
{
WAVMuxContext *wav = s->priv_data;
AVIOContext *pb = s->pb;
AVCodecContext *enc = s->streams[0]->codec;
int64_t peak = ff_start_tag(s->pb, "levl");
int64_t now0;
time_t now_secs;
char timestamp[28];
/* Peak frame of incomplete block at end */
if (wav->peak_block_pos)
peak_write_frame(s);
memset(timestamp, 0, sizeof(timestamp));
if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
struct tm tmpbuf;
av_log(s, AV_LOG_INFO, "Writing local time and date to Peak Envelope Chunk\n");
now0 = av_gettime();
now_secs = now0 / 1000000;
if (strftime(timestamp, sizeof(timestamp), "%Y:%m:%d:%H:%M:%S:", localtime_r(&now_secs, &tmpbuf))) {
av_strlcatf(timestamp, sizeof(timestamp), "%03d", (int)((now0 / 1000) % 1000));
} else {
av_log(s, AV_LOG_ERROR, "Failed to write timestamp\n");
return -1;
}
}
avio_wl32(pb, 1); /* version */
avio_wl32(pb, wav->peak_format); /* 8 or 16 bit */
avio_wl32(pb, wav->peak_ppv); /* positive and negative */
avio_wl32(pb, wav->peak_block_size); /* frames per value */
avio_wl32(pb, enc->channels); /* number of channels */
avio_wl32(pb, wav->peak_num_frames); /* number of peak frames */
avio_wl32(pb, wav->peak_pos_pop); /* audio sample frame index */
avio_wl32(pb, 128); /* equal to size of header */
avio_write(pb, timestamp, 28); /* ASCII time stamp */
ffio_fill(pb, 0, 60);
avio_write(pb, wav->peak_output, wav->peak_outbuf_bytes);
ff_end_tag(pb, peak);
if (!wav->data)
wav->data = peak;
return 0;
}
static int wav_write_header(AVFormatContext *s)
{
WAVMuxContext *wav = s->priv_data;
AVIOContext *pb = s->pb;
int64_t fmt;
if (s->nb_streams != 1) {
av_log(s, AV_LOG_ERROR, "WAVE files have exactly one stream\n");
return AVERROR(EINVAL);
}
if (wav->rf64 == RF64_ALWAYS) {
ffio_wfourcc(pb, "RF64");
avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */
} else {
ffio_wfourcc(pb, "RIFF");
avio_wl32(pb, -1); /* file length */
}
ffio_wfourcc(pb, "WAVE");
if (wav->rf64 != RF64_NEVER) {
/* write empty ds64 chunk or JUNK chunk to reserve space for ds64 */
ffio_wfourcc(pb, wav->rf64 == RF64_ALWAYS ? "ds64" : "JUNK");
avio_wl32(pb, 28); /* chunk size */
wav->ds64 = avio_tell(pb);
ffio_fill(pb, 0, 28);
}
if (wav->write_peak != 2) {
/* format header */
fmt = ff_start_tag(pb, "fmt ");
if (ff_put_wav_header(pb, s->streams[0]->codec, 0) < 0) {
const AVCodecDescriptor *desc = avcodec_descriptor_get(s->streams[0]->codec->codec_id);
av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
desc ? desc->name : "unknown");
return AVERROR(ENOSYS);
}
ff_end_tag(pb, fmt);
}
if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
&& s->pb->seekable) {
wav->fact_pos = ff_start_tag(pb, "fact");
avio_wl32(pb, 0);
ff_end_tag(pb, wav->fact_pos);
}
if (wav->write_bext)
bwf_write_bext_chunk(s);
if (wav->write_peak) {
int ret;
if ((ret = peak_init_writer(s)) < 0)
return ret;
}
avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
wav->maxpts = wav->last_duration = 0;
wav->minpts = INT64_MAX;
if (wav->write_peak != 2) {
/* info header */
ff_riff_write_info(s);
/* data header */
wav->data = ff_start_tag(pb, "data");
}
avio_flush(pb);
return 0;
}
static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIOContext *pb = s->pb;
WAVMuxContext *wav = s->priv_data;
if (wav->write_peak != 2)
avio_write(pb, pkt->data, pkt->size);
if (wav->write_peak) {
int c = 0;
int i;
for (i = 0; i < pkt->size; i += wav->peak_bps) {
if (wav->peak_bps == 1) {
wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], *(int8_t*)(pkt->data + i));
wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], *(int8_t*)(pkt->data + i));
} else {
wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], (int16_t)AV_RL16(pkt->data + i));
wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], (int16_t)AV_RL16(pkt->data + i));
}
if (++c == s->streams[0]->codec->channels) {
c = 0;
if (++wav->peak_block_pos == wav->peak_block_size) {
peak_write_frame(s);
wav->peak_block_pos = 0;
}
}
}
}
if(pkt->pts != AV_NOPTS_VALUE) {
wav->minpts = FFMIN(wav->minpts, pkt->pts);
wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
wav->last_duration = pkt->duration;
} else
av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
return 0;
}
static int wav_write_trailer(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
WAVMuxContext *wav = s->priv_data;
int64_t file_size, data_size;
int64_t number_of_samples = 0;
int rf64 = 0;
int ret = 0;
avio_flush(pb);
if (s->pb->seekable) {
if (wav->write_peak != 2 && avio_tell(pb) - wav->data < UINT32_MAX) {
ff_end_tag(pb, wav->data);
avio_flush(pb);
}
if (wav->write_peak && wav->peak_output) {
ret = peak_write_chunk(s);
avio_flush(pb);
}
/* update file size */
file_size = avio_tell(pb);
data_size = file_size - wav->data;
if (wav->rf64 == RF64_ALWAYS || (wav->rf64 == RF64_AUTO && file_size - 8 > UINT32_MAX)) {
rf64 = 1;
} else if (file_size - 8 <= UINT32_MAX) {
avio_seek(pb, 4, SEEK_SET);
avio_wl32(pb, (uint32_t)(file_size - 8));
avio_seek(pb, file_size, SEEK_SET);
avio_flush(pb);
} else {
av_log(s, AV_LOG_ERROR,
"Filesize %"PRId64" invalid for wav, output file will be broken\n",
file_size);
}
number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
s->streams[0]->time_base.den);
if(s->streams[0]->codec->codec_tag != 0x01) {
/* Update num_samps in fact chunk */
avio_seek(pb, wav->fact_pos, SEEK_SET);
if (rf64 || (wav->rf64 == RF64_AUTO && number_of_samples > UINT32_MAX)) {
rf64 = 1;
avio_wl32(pb, -1);
} else {
avio_wl32(pb, number_of_samples);
avio_seek(pb, file_size, SEEK_SET);
avio_flush(pb);
}
}
if (rf64) {
/* overwrite RIFF with RF64 */
avio_seek(pb, 0, SEEK_SET);
ffio_wfourcc(pb, "RF64");
avio_wl32(pb, -1);
/* write ds64 chunk (overwrite JUNK if rf64 == RF64_AUTO) */
avio_seek(pb, wav->ds64 - 8, SEEK_SET);
ffio_wfourcc(pb, "ds64");
avio_wl32(pb, 28); /* ds64 chunk size */
avio_wl64(pb, file_size - 8); /* RF64 chunk size */
avio_wl64(pb, data_size); /* data chunk size */
avio_wl64(pb, number_of_samples); /* fact chunk number of samples */
avio_wl32(pb, 0); /* number of table entries for non-'data' chunks */
/* write -1 in data chunk size */
avio_seek(pb, wav->data - 4, SEEK_SET);
avio_wl32(pb, -1);
avio_seek(pb, file_size, SEEK_SET);
avio_flush(pb);
}
}
if (wav->write_peak)
peak_free_buffers(s);
return ret;
}
#define OFFSET(x) offsetof(WAVMuxContext, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
{ "write_peak", "Write Peak Envelope chunk.", OFFSET(write_peak), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, ENC, "peak" },
{ "off", "Do not write peak chunk.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_OFF }, 0, 0, ENC, "peak" },
{ "on", "Append peak chunk after wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ON }, 0, 0, ENC, "peak" },
{ "only", "Write only peak chunk, omit wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ONLY }, 0, 0, ENC, "peak" },
{ "rf64", "Use RF64 header rather than RIFF for large files.", OFFSET(rf64), AV_OPT_TYPE_INT, { .i64 = RF64_NEVER },-1, 1, ENC, "rf64" },
{ "auto", "Write RF64 header if file grows large enough.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO }, 0, 0, ENC, "rf64" },
{ "always", "Always write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" },
{ "never", "Never write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER }, 0, 0, ENC, "rf64" },
{ "peak_block_size", "Number of audio samples used to generate each peak frame.", OFFSET(peak_block_size), AV_OPT_TYPE_INT, { .i64 = 256 }, 0, 65536, ENC },
{ "peak_format", "The format of the peak envelope data (1: uint8, 2: uint16).", OFFSET(peak_format), AV_OPT_TYPE_INT, { .i64 = PEAK_FORMAT_UINT16 }, PEAK_FORMAT_UINT8, PEAK_FORMAT_UINT16, ENC },
{ "peak_ppv", "Number of peak points per peak value (1 or 2).", OFFSET(peak_ppv), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, 2, ENC },
{ NULL },
};
static const AVClass wav_muxer_class = {
.class_name = "WAV muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_wav_muxer = {
.name = "wav",
.long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
.mime_type = "audio/x-wav",
.extensions = "wav",
.priv_data_size = sizeof(WAVMuxContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_NONE,
.write_header = wav_write_header,
.write_packet = wav_write_packet,
.write_trailer = wav_write_trailer,
.flags = AVFMT_TS_NONSTRICT,
.codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
.priv_class = &wav_muxer_class,
};
#endif /* CONFIG_WAV_MUXER */
#if CONFIG_W64_MUXER
#include "w64.h"
static void start_guid(AVIOContext *pb, const uint8_t *guid, int64_t *pos)
{
*pos = avio_tell(pb);
avio_write(pb, guid, 16);
avio_wl64(pb, INT64_MAX);
}
static void end_guid(AVIOContext *pb, int64_t start)
{
int64_t end, pos = avio_tell(pb);
end = FFALIGN(pos, 8);
ffio_fill(pb, 0, end - pos);
avio_seek(pb, start + 16, SEEK_SET);
avio_wl64(pb, end - start);
avio_seek(pb, end, SEEK_SET);
}
static int w64_write_header(AVFormatContext *s)
{
WAVMuxContext *wav = s->priv_data;
AVIOContext *pb = s->pb;
int64_t start;
int ret;
avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff));
avio_wl64(pb, -1);
avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave));
start_guid(pb, ff_w64_guid_fmt, &start);
if ((ret = ff_put_wav_header(pb, s->streams[0]->codec, 0)) < 0) {
av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
return ret;
}
end_guid(pb, start);
if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
&& s->pb->seekable) {
start_guid(pb, ff_w64_guid_fact, &wav->fact_pos);
avio_wl64(pb, 0);
end_guid(pb, wav->fact_pos);
}
start_guid(pb, ff_w64_guid_data, &wav->data);
return 0;
}
static int w64_write_trailer(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
WAVMuxContext *wav = s->priv_data;
int64_t file_size;
if (pb->seekable) {
end_guid(pb, wav->data);
file_size = avio_tell(pb);
avio_seek(pb, 16, SEEK_SET);
avio_wl64(pb, file_size);
if (s->streams[0]->codec->codec_tag != 0x01) {
int64_t number_of_samples;
number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
s->streams[0]->time_base.den);
avio_seek(pb, wav->fact_pos + 24, SEEK_SET);
avio_wl64(pb, number_of_samples);
}
avio_seek(pb, file_size, SEEK_SET);
avio_flush(pb);
}
return 0;
}
AVOutputFormat ff_w64_muxer = {
.name = "w64",
.long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
.extensions = "w64",
.priv_data_size = sizeof(WAVMuxContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_NONE,
.write_header = w64_write_header,
.write_packet = wav_write_packet,
.write_trailer = w64_write_trailer,
.flags = AVFMT_TS_NONSTRICT,
.codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
};
#endif /* CONFIG_W64_MUXER */
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