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avcodec/dynamic_hdr10_plus: don't take a GetBitContext as input argument 

Create a local one instead from a byte buffer input argument.
This prevents skipping bytes that may belong to another SEI message.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2020-12-06 12:30:14 -03:00
parent b9f7c9b272
commit 1aa72fe794
3 changed files with 18 additions and 7 deletions
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13
libavcodec/dynamic_hdr10_plus.c
View File

@ -17,6 +17,7 @@
*/
#include "dynamic_hdr10_plus.h"
#include "get_bits.h"
static const uint8_t usa_country_code = 0xB5;
static const uint16_t smpte_provider_code = 0x003C;
@ -30,11 +31,19 @@ static const int32_t knee_point_den = 4095;
static const int32_t bezier_anchor_den = 1023;
static const int32_t saturation_weight_den = 8;
int ff_parse_itu_t_t35_to_dynamic_hdr10_plus(GetBitContext *gb, AVDynamicHDRPlus *s)
int ff_parse_itu_t_t35_to_dynamic_hdr10_plus(AVDynamicHDRPlus *s, const uint8_t *data,
int size)
{
GetBitContext gbc, *gb = &gbc;
int ret;
if (!s)
return AVERROR(ENOMEM);
ret = init_get_bits8(gb, data, size);
if (ret < 0)
return ret;
s->application_version = get_bits(gb, 8);
if (get_bits_left(gb) < 2)
@ -189,7 +198,5 @@ int ff_parse_itu_t_t35_to_dynamic_hdr10_plus(GetBitContext *gb, AVDynamicHDRPlus
}
}
skip_bits(gb, get_bits_left(gb));
return 0;
}

7
libavcodec/dynamic_hdr10_plus.h
View File

@ -20,15 +20,16 @@
#define AVCODEC_DYNAMIC_HDR10_PLUS_H
#include "libavutil/hdr_dynamic_metadata.h"
#include "get_bits.h"
/**
* Parse the user data registered ITU-T T.35 to AVbuffer (AVDynamicHDRPlus).
* @param gb The bit content to be decoded.
* @param s A pointer containing the decoded AVDynamicHDRPlus structure.
* @param data The byte array containing the raw ITU-T T.35 data.
* @param size Size of the data array in bytes.
*
* @return 0 if succeed. Otherwise, returns the appropriate AVERROR.
*/
int ff_parse_itu_t_t35_to_dynamic_hdr10_plus(GetBitContext *gb, AVDynamicHDRPlus *s);
int ff_parse_itu_t_t35_to_dynamic_hdr10_plus(AVDynamicHDRPlus *s, const uint8_t *data,
int size);
#endif /* AVCODEC_DYNAMIC_HDR10_PLUS_H */

5
libavcodec/hevc_sei.c
View File

@ -216,7 +216,8 @@ static int decode_registered_user_data_dynamic_hdr_plus(HEVCSEIDynamicHDRPlus *s
if (!metadata)
return AVERROR(ENOMEM);
err = ff_parse_itu_t_t35_to_dynamic_hdr10_plus(gb, metadata);
err = ff_parse_itu_t_t35_to_dynamic_hdr10_plus(metadata,
gb->buffer + get_bits_count(gb) / 8, size);
if (err < 0) {
av_free(metadata);
return err;
@ -229,6 +230,8 @@ static int decode_registered_user_data_dynamic_hdr_plus(HEVCSEIDynamicHDRPlus *s
return AVERROR(ENOMEM);
}
skip_bits_long(gb, size * 8);
return 0;
}