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avformat/vvc: Fix crash on allocation failure, avoid allocations 

This is the VVC version of 8b5d155301.

(Hint: This ensures that the order of NALU arrays is OPI-VPS-SPS-PPS-
Prefix-SEI-Suffix-SEI, regardless of the order in the original
extradata. I hope this is right.)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-06-05 12:44:50 +02:00
parent 4482b3353d
commit 8b6c7e7cda
1 changed files with 73 additions and 96 deletions
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169
libavformat/vvc.c
View File

@ -32,6 +32,16 @@
#include "avio_internal.h"
#include "vvc.h"
enum {
OPI_INDEX,
VPS_INDEX,
SPS_INDEX,
PPS_INDEX,
SEI_PREFIX_INDEX,
SEI_SUFFIX_INDEX,
NB_ARRAYS
};
typedef struct VVCCNALUnitArray {
uint8_t array_completeness;
uint8_t NAL_unit_type;
@ -67,7 +77,7 @@ typedef struct VVCDecoderConfigurationRecord {
uint16_t max_picture_height;
uint16_t avg_frame_rate;
uint8_t num_of_arrays;
VVCCNALUnitArray *array;
VVCCNALUnitArray arrays[NB_ARRAYS];
} VVCDecoderConfigurationRecord;
static void vvcc_update_ptl(VVCDecoderConfigurationRecord *vvcc,
@ -432,32 +442,11 @@ static void nal_unit_parse_header(GetBitContext *gb, uint8_t *nal_type)
static int vvcc_array_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
uint8_t nal_type, int ps_array_completeness,
VVCDecoderConfigurationRecord *vvcc)
VVCCNALUnitArray *array)
{
int ret;
uint8_t index;
uint16_t num_nalus;
VVCCNALUnitArray *array;
for (index = 0; index < vvcc->num_of_arrays; index++)
if (vvcc->array[index].NAL_unit_type == nal_type)
break;
if (index >= vvcc->num_of_arrays) {
uint8_t i;
ret =
av_reallocp_array(&vvcc->array, index + 1,
sizeof(VVCCNALUnitArray));
if (ret < 0)
return ret;
for (i = vvcc->num_of_arrays; i <= index; i++)
memset(&vvcc->array[i], 0, sizeof(VVCCNALUnitArray));
vvcc->num_of_arrays = index + 1;
}
array = &vvcc->array[index];
num_nalus = array->num_nalus;
ret = av_reallocp_array(&array->nal_unit, num_nalus + 1, sizeof(uint8_t *));
@ -504,7 +493,8 @@ static int vvcc_array_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
static int vvcc_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
int ps_array_completeness,
VVCDecoderConfigurationRecord *vvcc)
VVCDecoderConfigurationRecord *vvcc,
unsigned array_idx)
{
int ret = 0;
GetBitContext gbc;
@ -529,18 +519,15 @@ static int vvcc_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
* vvcc. Perhaps the SEI playload type should be checked
* and non-declarative SEI messages discarded?
*/
switch (nal_type) {
case VVC_OPI_NUT:
case VVC_VPS_NUT:
case VVC_SPS_NUT:
case VVC_PPS_NUT:
case VVC_PREFIX_SEI_NUT:
case VVC_SUFFIX_SEI_NUT:
ret = vvcc_array_add_nal_unit(nal_buf, nal_size, nal_type,
ps_array_completeness, vvcc);
if (ret < 0)
goto end;
else if (nal_type == VVC_VPS_NUT)
ret = vvcc_array_add_nal_unit(nal_buf, nal_size, nal_type,
ps_array_completeness,
&vvcc->arrays[array_idx]);
if (ret < 0)
goto end;
if (vvcc->arrays[array_idx].num_nalus == 1)
vvcc->num_of_arrays++;
if (nal_type == VVC_VPS_NUT)
ret = vvcc_parse_vps(&gbc, vvcc);
else if (nal_type == VVC_SPS_NUT)
ret = vvcc_parse_sps(&gbc, vvcc);
@ -551,11 +538,6 @@ static int vvcc_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
}
if (ret < 0)
goto end;
break;
default:
ret = AVERROR_INVALIDDATA;
goto end;
}
end:
av_free(rbsp_buf);
@ -572,22 +554,21 @@ static void vvcc_init(VVCDecoderConfigurationRecord *vvcc)
static void vvcc_close(VVCDecoderConfigurationRecord *vvcc)
{
uint8_t i;
for (unsigned i = 0; i < FF_ARRAY_ELEMS(vvcc->arrays); i++) {
VVCCNALUnitArray *const array = &vvcc->arrays[i];
for (i = 0; i < vvcc->num_of_arrays; i++) {
vvcc->array[i].num_nalus = 0;
av_freep(&vvcc->array[i].nal_unit);
av_freep(&vvcc->array[i].nal_unit_length);
array->num_nalus = 0;
av_freep(&array->nal_unit);
av_freep(&array->nal_unit_length);
}
vvcc->num_of_arrays = 0;
av_freep(&vvcc->array);
}
static int vvcc_write(AVIOContext *pb, VVCDecoderConfigurationRecord *vvcc)
{
uint8_t i;
uint16_t j, vps_count = 0, sps_count = 0, pps_count = 0;
uint16_t vps_count = 0, sps_count = 0, pps_count = 0;
/*
* It's unclear how to properly compute these fields, so
* let's always set them to values meaning 'unspecified'.
@ -672,40 +653,33 @@ static int vvcc_write(AVIOContext *pb, VVCDecoderConfigurationRecord *vvcc)
av_log(NULL, AV_LOG_TRACE,
"num_of_arrays: %" PRIu8 "\n",
vvcc->num_of_arrays);
for (i = 0; i < vvcc->num_of_arrays; i++) {
for (unsigned i = 0; i < FF_ARRAY_ELEMS(vvcc->arrays); i++) {
const VVCCNALUnitArray *const array = &vvcc->arrays[i];
if (array->num_nalus == 0)
continue;
av_log(NULL, AV_LOG_TRACE,
"array_completeness[%" PRIu8 "]: %" PRIu8 "\n", i,
vvcc->array[i].array_completeness);
"array_completeness[%u]: %" PRIu8 "\n", i,
array->array_completeness);
av_log(NULL, AV_LOG_TRACE,
"NAL_unit_type[%" PRIu8 "]: %" PRIu8 "\n", i,
vvcc->array[i].NAL_unit_type);
"NAL_unit_type[%u]: %" PRIu8 "\n", i,
array->NAL_unit_type);
av_log(NULL, AV_LOG_TRACE,
"num_nalus[%" PRIu8 "]: %" PRIu16 "\n", i,
vvcc->array[i].num_nalus);
for (j = 0; j < vvcc->array[i].num_nalus; j++)
"num_nalus[%u]: %" PRIu16 "\n", i,
array->num_nalus);
for (unsigned j = 0; j < array->num_nalus; j++)
av_log(NULL, AV_LOG_TRACE,
"nal_unit_length[%" PRIu8 "][%" PRIu16 "]: %"
PRIu16 "\n", i, j, vvcc->array[i].nal_unit_length[j]);
"nal_unit_length[%u][%u]: %"
PRIu16 "\n", i, j, array->nal_unit_length[j]);
}
/*
* We need at least one of each: VPS and SPS.
*/
for (i = 0; i < vvcc->num_of_arrays; i++)
switch (vvcc->array[i].NAL_unit_type) {
case VVC_VPS_NUT:
vps_count += vvcc->array[i].num_nalus;
break;
case VVC_SPS_NUT:
sps_count += vvcc->array[i].num_nalus;
break;
case VVC_PPS_NUT:
pps_count += vvcc->array[i].num_nalus;
break;
default:
break;
}
vps_count = vvcc->arrays[VPS_INDEX].num_nalus;
sps_count = vvcc->arrays[SPS_INDEX].num_nalus;
pps_count = vvcc->arrays[PPS_INDEX].num_nalus;
if (vps_count > VVC_MAX_VPS_COUNT)
return AVERROR_INVALIDDATA;
if (!sps_count || sps_count > VVC_MAX_SPS_COUNT)
@ -804,25 +778,29 @@ static int vvcc_write(AVIOContext *pb, VVCDecoderConfigurationRecord *vvcc)
/* unsigned int(8) num_of_arrays; */
avio_w8(pb, vvcc->num_of_arrays);
for (i = 0; i < vvcc->num_of_arrays; i++) {
for (unsigned i = 0; i < FF_ARRAY_ELEMS(vvcc->arrays); i++) {
const VVCCNALUnitArray *const array = &vvcc->arrays[i];
if (!array->num_nalus)
continue;
/*
* bit(1) array_completeness;
* unsigned int(2) reserved = 0;
* unsigned int(5) NAL_unit_type;
*/
avio_w8(pb, vvcc->array[i].array_completeness << 7 |
vvcc->array[i].NAL_unit_type & 0x1f);
avio_w8(pb, array->array_completeness << 7 |
array->NAL_unit_type & 0x1f);
/* unsigned int(16) num_nalus; */
if (vvcc->array[i].NAL_unit_type != VVC_DCI_NUT &&
vvcc->array[i].NAL_unit_type != VVC_OPI_NUT)
avio_wb16(pb, vvcc->array[i].num_nalus);
for (j = 0; j < vvcc->array[i].num_nalus; j++) {
if (array->NAL_unit_type != VVC_DCI_NUT &&
array->NAL_unit_type != VVC_OPI_NUT)
avio_wb16(pb, array->num_nalus);
for (int j = 0; j < array->num_nalus; j++) {
/* unsigned int(16) nal_unit_length; */
avio_wb16(pb, vvcc->array[i].nal_unit_length[j]);
avio_wb16(pb, array->nal_unit_length[j]);
/* bit(8*nal_unit_length) nal_unit; */
avio_write(pb, vvcc->array[i].nal_unit[j],
vvcc->array[i].nal_unit_length[j]);
avio_write(pb, array->nal_unit[j],
array->nal_unit_length[j]);
}
}
@ -932,19 +910,18 @@ int ff_isom_write_vvcc(AVIOContext *pb, const uint8_t *data,
buf += 4;
switch (type) {
case VVC_OPI_NUT:
case VVC_VPS_NUT:
case VVC_SPS_NUT:
case VVC_PPS_NUT:
case VVC_PREFIX_SEI_NUT:
case VVC_SUFFIX_SEI_NUT:
ret = vvcc_add_nal_unit(buf, len, ps_array_completeness, &vvcc);
if (ret < 0)
goto end;
break;
default:
break;
for (unsigned i = 0; i < FF_ARRAY_ELEMS(vvcc.arrays); i++) {
static const uint8_t array_idx_to_type[] =
{ VVC_OPI_NUT, VVC_VPS_NUT, VVC_SPS_NUT,
VVC_PPS_NUT, VVC_PREFIX_SEI_NUT, VVC_SUFFIX_SEI_NUT };
if (type == array_idx_to_type[i]) {
ret = vvcc_add_nal_unit(buf, len, ps_array_completeness,
&vvcc, i);
if (ret < 0)
goto end;
break;
}
}
buf += len;