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lavc/hevc_ps: parse constraint flags for HEVC REXT

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Parse all the constraint flags according to ITU-T Rec. H.265 (02/2018).

They have to be passed to hw decoders to determine the exact profile for Range
Extension HEVC.

Signed-off-by: Linjie Fu <linjie.fu@intel.com>
This commit is contained in:
Linjie Fu 2020-01-15 15:01:28 +08:00 committed by Mark Thompson
parent aa6b2e1604
commit 0d83fcc07b
2 changed files with 50 additions and 5 deletions
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42
libavcodec/hevc_ps.c
View File

@ -267,7 +267,7 @@ static int decode_profile_tier_level(GetBitContext *gb, AVCodecContext *avctx,
{
int i;
if (get_bits_left(gb) < 2+1+5 + 32 + 4 + 16 + 16 + 12)
if (get_bits_left(gb) < 2+1+5 + 32 + 4 + 43 + 1)
return -1;
ptl->profile_space = get_bits(gb, 2);
@ -295,9 +295,43 @@ static int decode_profile_tier_level(GetBitContext *gb, AVCodecContext *avctx,
ptl->non_packed_constraint_flag = get_bits1(gb);
ptl->frame_only_constraint_flag = get_bits1(gb);
skip_bits(gb, 16); // XXX_reserved_zero_44bits[0..15]
skip_bits(gb, 16); // XXX_reserved_zero_44bits[16..31]
skip_bits(gb, 12); // XXX_reserved_zero_44bits[32..43]
#define check_profile_idc(idc) \
ptl->profile_idc == idc || ptl->profile_compatibility_flag[idc]
if (check_profile_idc(4) || check_profile_idc(5) || check_profile_idc(6) ||
check_profile_idc(7) || check_profile_idc(8) || check_profile_idc(9) ||
check_profile_idc(10)) {
ptl->max_12bit_constraint_flag = get_bits1(gb);
ptl->max_10bit_constraint_flag = get_bits1(gb);
ptl->max_8bit_constraint_flag = get_bits1(gb);
ptl->max_422chroma_constraint_flag = get_bits1(gb);
ptl->max_420chroma_constraint_flag = get_bits1(gb);
ptl->max_monochrome_constraint_flag = get_bits1(gb);
ptl->intra_constraint_flag = get_bits1(gb);
ptl->one_picture_only_constraint_flag = get_bits1(gb);
ptl->lower_bit_rate_constraint_flag = get_bits1(gb);
if (check_profile_idc(5) || check_profile_idc(9) || check_profile_idc(10)) {
ptl->max_14bit_constraint_flag = get_bits1(gb);
skip_bits_long(gb, 33); // XXX_reserved_zero_33bits[0..32]
} else {
skip_bits_long(gb, 34); // XXX_reserved_zero_34bits[0..33]
}
} else if (check_profile_idc(2)) {
skip_bits(gb, 7);
ptl->one_picture_only_constraint_flag = get_bits1(gb);
skip_bits_long(gb, 35); // XXX_reserved_zero_35bits[0..34]
} else {
skip_bits_long(gb, 43); // XXX_reserved_zero_43bits[0..42]
}
if (check_profile_idc(1) || check_profile_idc(2) || check_profile_idc(3) ||
check_profile_idc(4) || check_profile_idc(5) || check_profile_idc(9))
ptl->inbld_flag = get_bits1(gb);
else
skip_bits1(gb);
#undef check_profile_idc
return 0;
}

13
libavcodec/hevc_ps.h
View File

@ -177,11 +177,22 @@ typedef struct PTLCommon {
uint8_t tier_flag;
uint8_t profile_idc;
uint8_t profile_compatibility_flag[32];
uint8_t level_idc;
uint8_t progressive_source_flag;
uint8_t interlaced_source_flag;
uint8_t non_packed_constraint_flag;
uint8_t frame_only_constraint_flag;
uint8_t max_12bit_constraint_flag;
uint8_t max_10bit_constraint_flag;
uint8_t max_8bit_constraint_flag;
uint8_t max_422chroma_constraint_flag;
uint8_t max_420chroma_constraint_flag;
uint8_t max_monochrome_constraint_flag;
uint8_t intra_constraint_flag;
uint8_t one_picture_only_constraint_flag;
uint8_t lower_bit_rate_constraint_flag;
uint8_t max_14bit_constraint_flag;
uint8_t inbld_flag;
uint8_t level_idc;
} PTLCommon;
typedef struct PTL {