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Merge commit 'ca2f19b9cc37be509d85f05c8f902860475905f8' 

* commit 'ca2f19b9cc37be509d85f05c8f902860475905f8':
  h264: switch to h2645_parse for NAL parsing

Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>
tags/n3.1
Hendrik Leppkes Derek Buitenhuis 9 years ago
parent
9cc1ab63ac ca2f19b9cc
commit
772ad7142d
3 changed files with 200 additions and 307 deletions
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  1. +3
    -1
      libavcodec/Makefile
  2. +194
    -306
      libavcodec/h264.c
  3. +3
    -0
      libavcodec/h264.h

+ 3
- 1
libavcodec/Makefile View File

@@ -308,7 +308,9 @@ OBJS-$(CONFIG_H263_ENCODER) += mpeg4videoenc.o mpeg4video.o \
OBJS-$(CONFIG_H264_DECODER) += h264.o h264_cabac.o h264_cavlc.o \
h264_direct.o h264_loopfilter.o \
h264_mb.o h264_picture.o h264_ps.o \
h264_refs.o h264_sei.o h264_slice.o h264data.o h264_parse.o
h264_refs.o h264_sei.o \
h264_slice.o h264data.o h264_parse.o \
h2645_parse.o
OBJS-$(CONFIG_H264_MEDIACODEC_DECODER) += mediacodecdec_h264.o
OBJS-$(CONFIG_H264_MMAL_DECODER) += mmaldec.o
OBJS-$(CONFIG_H264_VDA_DECODER) += vda_h264_dec.o


+ 194
- 306
libavcodec/h264.c View File

@@ -40,6 +40,7 @@
#include "error_resilience.h"
#include "avcodec.h"
#include "h264.h"
#include "h2645_parse.h"
#include "h264data.h"
#include "h264chroma.h"
#include "h264_mvpred.h"
@@ -243,25 +244,6 @@ nsc:
return dst;
}

/**
* Identify the exact end of the bitstream
* @return the length of the trailing, or 0 if damaged
*/
static int decode_rbsp_trailing(H264Context *h, const uint8_t *src)
{
int v = *src;
int r;

ff_tlog(h->avctx, "rbsp trailing %X\n", v);

for (r = 1; r < 9; r++) {
if (v & 1)
return r;
v >>= 1;
}
return 0;
}

void ff_h264_free_tables(H264Context *h)
{
int i;
@@ -1179,85 +1161,39 @@ int ff_set_ref_count(H264Context *h, H264SliceContext *sl)
return 0;
}

#if FF_API_CAP_VDPAU
static const uint8_t start_code[] = { 0x00, 0x00, 0x01 };
#endif

static int get_bit_length(H264Context *h, const uint8_t *buf,
const uint8_t *ptr, int dst_length,
int i, int next_avc)
{
if ((h->workaround_bugs & FF_BUG_AUTODETECT) && i + 3 < next_avc &&
buf[i] == 0x00 && buf[i + 1] == 0x00 &&
buf[i + 2] == 0x01 && buf[i + 3] == 0xE0)
h->workaround_bugs |= FF_BUG_TRUNCATED;

if (!(h->workaround_bugs & FF_BUG_TRUNCATED))
while (dst_length > 0 && ptr[dst_length - 1] == 0)
dst_length--;

if (!dst_length)
return 0;

return 8 * dst_length - decode_rbsp_trailing(h, ptr + dst_length - 1);
}

static int get_last_needed_nal(H264Context *h, const uint8_t *buf, int buf_size)
static int get_last_needed_nal(H264Context *h)
{
int next_avc = h->is_avc ? 0 : buf_size;
int nal_index = 0;
int buf_index = 0;
int nals_needed = 0;
int first_slice = 0;
int i;

while(1) {
for (i = 0; i < h->pkt.nb_nals; i++) {
H2645NAL *nal = &h->pkt.nals[i];
GetBitContext gb;
int nalsize = 0;
int dst_length, bit_length, consumed;
const uint8_t *ptr;

if (buf_index >= next_avc) {
nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
if (nalsize < 0)
break;
next_avc = buf_index + nalsize;
} else {
buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
if (buf_index >= buf_size)
break;
if (buf_index >= next_avc)
continue;
}

ptr = ff_h264_decode_nal(h, &h->slice_ctx[0], buf + buf_index, &dst_length, &consumed,
next_avc - buf_index);

if (!ptr || dst_length < 0)
return AVERROR_INVALIDDATA;

buf_index += consumed;

bit_length = get_bit_length(h, buf, ptr, dst_length,
buf_index, next_avc);
nal_index++;

/* packets can sometimes contain multiple PPS/SPS,
* e.g. two PAFF field pictures in one packet, or a demuxer
* which splits NALs strangely if so, when frame threading we
* can't start the next thread until we've read all of them */
switch (h->nal_unit_type) {
switch (nal->type) {
case NAL_SPS:
case NAL_PPS:
nals_needed = nal_index;
nals_needed = i;
break;
case NAL_DPA:
case NAL_IDR_SLICE:
case NAL_SLICE:
init_get_bits(&gb, ptr, bit_length);
init_get_bits8(&gb, nal->data + 1, (nal->size - 1));
if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
!first_slice ||
first_slice != h->nal_unit_type)
nals_needed = nal_index;
first_slice != nal->type)
nals_needed = i;
if (!first_slice)
first_slice = h->nal_unit_type;
first_slice = nal->type;
}
}

@@ -1268,14 +1204,10 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
int parse_extradata)
{
AVCodecContext *const avctx = h->avctx;
H264SliceContext *sl;
int buf_index;
unsigned context_count;
int next_avc;
unsigned context_count = 0;
int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
int nal_index;
int idr_cleared=0;
int ret = 0;
int i, ret = 0;

h->nal_unit_type= 0;

@@ -1296,262 +1228,216 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
h->is_avc = 1;
}

if (avctx->active_thread_type & FF_THREAD_FRAME)
nals_needed = get_last_needed_nal(h, buf, buf_size);

{
buf_index = 0;
context_count = 0;
next_avc = h->is_avc ? 0 : buf_size;
nal_index = 0;
for (;;) {
int consumed;
int dst_length;
int bit_length;
const uint8_t *ptr;
int nalsize = 0;
int err;

if (buf_index >= next_avc) {
nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
if (nalsize < 0)
break;
next_avc = buf_index + nalsize;
} else {
buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
if (buf_index >= buf_size)
break;
if (buf_index >= next_avc)
continue;
}

sl = &h->slice_ctx[context_count];

ptr = ff_h264_decode_nal(h, sl, buf + buf_index, &dst_length,
&consumed, next_avc - buf_index);
if (!ptr || dst_length < 0) {
ret = -1;
goto end;
}

bit_length = get_bit_length(h, buf, ptr, dst_length,
buf_index + consumed, next_avc);

if (h->avctx->debug & FF_DEBUG_STARTCODE)
av_log(h->avctx, AV_LOG_DEBUG,
"NAL %d/%d at %d/%d length %d\n",
h->nal_unit_type, h->nal_ref_idc, buf_index, buf_size, dst_length);
ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
h->nal_length_size, avctx->codec_id);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR,
"Error splitting the input into NAL units.\n");
return ret;
}

if (h->is_avc && (nalsize != consumed) && nalsize)
av_log(h->avctx, AV_LOG_DEBUG,
"AVC: Consumed only %d bytes instead of %d\n",
consumed, nalsize);
if (avctx->active_thread_type & FF_THREAD_FRAME)
nals_needed = get_last_needed_nal(h);

buf_index += consumed;
nal_index++;
for (i = 0; i < h->pkt.nb_nals; i++) {
H2645NAL *nal = &h->pkt.nals[i];
H264SliceContext *sl = &h->slice_ctx[context_count];
int err;

if (avctx->skip_frame >= AVDISCARD_NONREF &&
h->nal_ref_idc == 0 &&
h->nal_unit_type != NAL_SEI)
continue;
if (avctx->skip_frame >= AVDISCARD_NONREF &&
nal->ref_idc == 0 && nal->type != NAL_SEI)
continue;

again:
/* Ignore per frame NAL unit type during extradata
* parsing. Decoding slices is not possible in codec init
* with frame-mt */
if (parse_extradata) {
switch (h->nal_unit_type) {
case NAL_IDR_SLICE:
case NAL_SLICE:
case NAL_DPA:
case NAL_DPB:
case NAL_DPC:
av_log(h->avctx, AV_LOG_WARNING,
"Ignoring NAL %d in global header/extradata\n",
h->nal_unit_type);
// fall through to next case
case NAL_AUXILIARY_SLICE:
h->nal_unit_type = NAL_FF_IGNORE;
}
/* Ignore per frame NAL unit type during extradata
* parsing. Decoding slices is not possible in codec init
* with frame-mt */
if (parse_extradata) {
switch (nal->type) {
case NAL_IDR_SLICE:
case NAL_SLICE:
case NAL_DPA:
case NAL_DPB:
case NAL_DPC:
av_log(h->avctx, AV_LOG_WARNING,
"Ignoring NAL %d in global header/extradata\n",
nal->type);
// fall through to next case
case NAL_AUXILIARY_SLICE:
nal->type = NAL_FF_IGNORE;
}
}

err = 0;
// FIXME these should stop being context-global variables
h->nal_ref_idc = nal->ref_idc;
h->nal_unit_type = nal->type;

switch (h->nal_unit_type) {
case NAL_IDR_SLICE:
if ((ptr[0] & 0xFC) == 0x98) {
av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
h->next_outputed_poc = INT_MIN;
ret = -1;
goto end;
}
if (h->nal_unit_type != NAL_IDR_SLICE) {
av_log(h->avctx, AV_LOG_ERROR,
"Invalid mix of idr and non-idr slices\n");
ret = -1;
err = 0;
switch (nal->type) {
case NAL_IDR_SLICE:
if ((nal->data[1] & 0xFC) == 0x98) {
av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
h->next_outputed_poc = INT_MIN;
ret = -1;
goto end;
}
if (nal->type != NAL_IDR_SLICE) {
av_log(h->avctx, AV_LOG_ERROR,
"Invalid mix of idr and non-idr slices\n");
ret = -1;
goto end;
}
if(!idr_cleared) {
if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");
ret = AVERROR_INVALIDDATA;
goto end;
}
if(!idr_cleared) {
if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");
ret = AVERROR_INVALIDDATA;
goto end;
}
idr(h); // FIXME ensure we don't lose some frames if there is reordering
}
idr_cleared = 1;
h->has_recovery_point = 1;
case NAL_SLICE:
init_get_bits(&sl->gb, ptr, bit_length);

if ( nals_needed >= nal_index
|| (!(avctx->active_thread_type & FF_THREAD_FRAME) && !context_count))
h->au_pps_id = -1;
idr(h); // FIXME ensure we don't lose some frames if there is reordering
}
idr_cleared = 1;
h->has_recovery_point = 1;
case NAL_SLICE:
sl->gb = nal->gb;
if ( nals_needed >= i
|| (!(avctx->active_thread_type & FF_THREAD_FRAME) && !context_count))
h->au_pps_id = -1;

if ((err = ff_h264_decode_slice_header(h, sl)))
break;
if ((err = ff_h264_decode_slice_header(h, sl)))
break;

if (h->sei_recovery_frame_cnt >= 0) {
if (h->frame_num != h->sei_recovery_frame_cnt || sl->slice_type_nos != AV_PICTURE_TYPE_I)
h->valid_recovery_point = 1;
if (h->sei_recovery_frame_cnt >= 0) {
if (h->frame_num != h->sei_recovery_frame_cnt || sl->slice_type_nos != AV_PICTURE_TYPE_I)
h->valid_recovery_point = 1;

if ( h->recovery_frame < 0
|| av_mod_uintp2(h->recovery_frame - h->frame_num, h->sps.log2_max_frame_num) > h->sei_recovery_frame_cnt) {
h->recovery_frame = av_mod_uintp2(h->frame_num + h->sei_recovery_frame_cnt, h->sps.log2_max_frame_num);
if ( h->recovery_frame < 0
|| av_mod_uintp2(h->recovery_frame - h->frame_num, h->sps.log2_max_frame_num) > h->sei_recovery_frame_cnt) {
h->recovery_frame = av_mod_uintp2(h->frame_num + h->sei_recovery_frame_cnt, h->sps.log2_max_frame_num);

if (!h->valid_recovery_point)
h->recovery_frame = h->frame_num;
}
if (!h->valid_recovery_point)
h->recovery_frame = h->frame_num;
}
}

h->cur_pic_ptr->f->key_frame |=
(h->nal_unit_type == NAL_IDR_SLICE);
h->cur_pic_ptr->f->key_frame |= (nal->type == NAL_IDR_SLICE);

if (h->nal_unit_type == NAL_IDR_SLICE ||
(h->recovery_frame == h->frame_num && h->nal_ref_idc)) {
h->recovery_frame = -1;
h->cur_pic_ptr->recovered = 1;
}
// If we have an IDR, all frames after it in decoded order are
// "recovered".
if (h->nal_unit_type == NAL_IDR_SLICE)
h->frame_recovered |= FRAME_RECOVERED_IDR;
if (nal->type == NAL_IDR_SLICE ||
(h->recovery_frame == h->frame_num && nal->ref_idc)) {
h->recovery_frame = -1;
h->cur_pic_ptr->recovered = 1;
}
// If we have an IDR, all frames after it in decoded order are
// "recovered".
if (nal->type == NAL_IDR_SLICE)
h->frame_recovered |= FRAME_RECOVERED_IDR;
#if 1
h->cur_pic_ptr->recovered |= h->frame_recovered;
h->cur_pic_ptr->recovered |= h->frame_recovered;
#else
h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
#endif

if (h->current_slice == 1) {
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS))
decode_postinit(h, nal_index >= nals_needed);
if (h->current_slice == 1) {
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS))
decode_postinit(h, i >= nals_needed);

if (h->avctx->hwaccel &&
(ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
goto end;
if (h->avctx->hwaccel &&
(ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
goto end;
#if FF_API_CAP_VDPAU
if (CONFIG_H264_VDPAU_DECODER &&
h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
ff_vdpau_h264_picture_start(h);
if (CONFIG_H264_VDPAU_DECODER &&
h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
ff_vdpau_h264_picture_start(h);
#endif
}
}

if (sl->redundant_pic_count == 0) {
if (avctx->hwaccel) {
ret = avctx->hwaccel->decode_slice(avctx,
&buf[buf_index - consumed],
consumed);
if (ret < 0)
goto end;
if (sl->redundant_pic_count == 0) {
if (avctx->hwaccel) {
ret = avctx->hwaccel->decode_slice(avctx,
nal->raw_data,
nal->raw_size);
if (ret < 0)
goto end;
#if FF_API_CAP_VDPAU
} else if (CONFIG_H264_VDPAU_DECODER &&
h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU) {
ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
start_code,
sizeof(start_code));
ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
&buf[buf_index - consumed],
consumed);
} else if (CONFIG_H264_VDPAU_DECODER &&
h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU) {
ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
start_code,
sizeof(start_code));
ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
nal->raw_data,
nal->raw_size);
#endif
} else
context_count++;
}
break;
case NAL_DPA:
case NAL_DPB:
case NAL_DPC:
avpriv_request_sample(avctx, "data partitioning");
} else
context_count++;
}
break;
case NAL_DPA:
case NAL_DPB:
case NAL_DPC:
avpriv_request_sample(avctx, "data partitioning");
break;
case NAL_SEI:
h->gb = nal->gb;
ret = ff_h264_decode_sei(h);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
break;
case NAL_SPS:
h->gb = nal->gb;
if (ff_h264_decode_seq_parameter_set(h, 0) >= 0)
break;
case NAL_SEI:
init_get_bits(&h->gb, ptr, bit_length);
ret = ff_h264_decode_sei(h);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
av_log(h->avctx, AV_LOG_DEBUG,
"SPS decoding failure, trying again with the complete NAL\n");
init_get_bits8(&h->gb, nal->raw_data + 1, nal->raw_size - 1);
if (ff_h264_decode_seq_parameter_set(h, 0) >= 0)
break;
case NAL_SPS:
init_get_bits(&h->gb, ptr, bit_length);
if (ff_h264_decode_seq_parameter_set(h, 0) >= 0)
break;
if (h->is_avc ? nalsize : 1) {
av_log(h->avctx, AV_LOG_DEBUG,
"SPS decoding failure, trying again with the complete NAL\n");
if (h->is_avc)
av_assert0(next_avc - buf_index + consumed == nalsize);
if ((next_avc - buf_index + consumed - 1) >= INT_MAX/8)
break;
init_get_bits(&h->gb, &buf[buf_index + 1 - consumed],
8*(next_avc - buf_index + consumed - 1));
if (ff_h264_decode_seq_parameter_set(h, 0) >= 0)
break;
}
init_get_bits(&h->gb, ptr, bit_length);
ff_h264_decode_seq_parameter_set(h, 1);
h->gb = nal->gb;
ff_h264_decode_seq_parameter_set(h, 1);

break;
case NAL_PPS:
init_get_bits(&h->gb, ptr, bit_length);
ret = ff_h264_decode_picture_parameter_set(h, bit_length);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
break;
case NAL_AUD:
case NAL_END_SEQUENCE:
case NAL_END_STREAM:
case NAL_FILLER_DATA:
case NAL_SPS_EXT:
case NAL_AUXILIARY_SLICE:
break;
case NAL_FF_IGNORE:
break;
default:
av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
h->nal_unit_type, bit_length);
}
break;
case NAL_PPS:
h->gb = nal->gb;
ret = ff_h264_decode_picture_parameter_set(h, nal->size_bits);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
break;
case NAL_AUD:
case NAL_END_SEQUENCE:
case NAL_END_STREAM:
case NAL_FILLER_DATA:
case NAL_SPS_EXT:
case NAL_AUXILIARY_SLICE:
break;
case NAL_FF_IGNORE:
break;
default:
av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
nal->type, nal->size_bits);
}

if (context_count == h->max_contexts) {
ret = ff_h264_execute_decode_slices(h, context_count);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
context_count = 0;
}

if (context_count == h->max_contexts) {
ret = ff_h264_execute_decode_slices(h, context_count);
if (err < 0 || err == SLICE_SKIPED) {
if (err < 0)
av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
sl->ref_count[0] = sl->ref_count[1] = sl->list_count = 0;
} else if (err == SLICE_SINGLETHREAD) {
if (context_count > 1) {
ret = ff_h264_execute_decode_slices(h, context_count - 1);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
context_count = 0;
}

if (err < 0 || err == SLICE_SKIPED) {
if (err < 0)
av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
sl->ref_count[0] = sl->ref_count[1] = sl->list_count = 0;
} else if (err == SLICE_SINGLETHREAD) {
if (context_count > 1) {
ret = ff_h264_execute_decode_slices(h, context_count - 1);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
context_count = 0;
}
/* Slice could not be decoded in parallel mode, restart. Note
* that rbsp_buffer is not transferred, but since we no longer
* run in parallel mode this should not be an issue. */
sl = &h->slice_ctx[0];
goto again;
}
/* Slice could not be decoded in parallel mode, restart. Note
* that rbsp_buffer is not transferred, but since we no longer
* run in parallel mode this should not be an issue. */
sl = &h->slice_ctx[0];
goto again;
}
}
if (context_count) {
@@ -1564,7 +1450,6 @@ again:
end:

#if CONFIG_ERROR_RESILIENCE
sl = h->slice_ctx;
/*
* FIXME: Error handling code does not seem to support interlaced
* when slices span multiple rows
@@ -1578,6 +1463,7 @@ end:
* causes problems for the first MB line, too.
*/
if (!FIELD_PICTURE(h) && h->current_slice && !h->sps.new && h->enable_er) {
H264SliceContext *sl = h->slice_ctx;
int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];

ff_h264_set_erpic(&sl->er.cur_pic, h->cur_pic_ptr);
@@ -1609,7 +1495,7 @@ end:
h->picture_structure == PICT_BOTTOM_FIELD);
}

return (ret < 0) ? ret : buf_index;
return (ret < 0) ? ret : buf_size;
}

/**
@@ -1860,6 +1746,8 @@ av_cold void ff_h264_free_context(H264Context *h)

for (i = 0; i < MAX_PPS_COUNT; i++)
av_freep(h->pps_buffers + i);

ff_h2645_packet_uninit(&h->pkt);
}

static av_cold int h264_decode_end(AVCodecContext *avctx)


+ 3
- 0
libavcodec/h264.h View File

@@ -34,6 +34,7 @@
#include "error_resilience.h"
#include "get_bits.h"
#include "h264_parse.h"
#include "h2645_parse.h"
#include "h264chroma.h"
#include "h264dsp.h"
#include "h264pred.h"
@@ -527,6 +528,8 @@ typedef struct H264Context {
H264SliceContext *slice_ctx;
int nb_slice_ctx;

H2645Packet pkt;

int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264

/* coded dimensions -- 16 * mb w/h */


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