diff options
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/hevc.h | 65 | ||||
| -rw-r--r-- | libavcodec/hevc_ps.c | 2 | ||||
| -rw-r--r-- | libavcodec/hevc_ps.h | 6 |
3 files changed, 57 insertions, 16 deletions
diff --git a/libavcodec/hevc.h b/libavcodec/hevc.h index f0fb919..2f20db8 100644 --- a/libavcodec/hevc.h +++ b/libavcodec/hevc.h @@ -74,19 +74,60 @@ enum HEVCSliceType { HEVC_SLICE_I = 2, }; -/** - * 7.4.2.1 - */ -#define HEVC_MAX_SUB_LAYERS 7 -#define HEVC_MAX_VPS_COUNT 16 -#define HEVC_MAX_SPS_COUNT 32 -#define HEVC_MAX_PPS_COUNT 256 -#define HEVC_MAX_SHORT_TERM_RPS_COUNT 64 -#define HEVC_MAX_CU_SIZE 128 +enum { + // 7.4.3.1: vps_max_layers_minus1 is in [0, 62]. + HEVC_MAX_LAYERS = 63, + // 7.4.3.1: vps_max_sub_layers_minus1 is in [0, 6]. + HEVC_MAX_SUB_LAYERS = 7, + // 7.4.3.1: vps_num_layer_sets_minus1 is in [0, 1023]. + HEVC_MAX_LAYER_SETS = 1024, + + // 7.4.2.1: vps_video_parameter_set_id is u(4). + HEVC_MAX_VPS_COUNT = 16, + // 7.4.3.2.1: sps_seq_parameter_set_id is in [0, 15]. + HEVC_MAX_SPS_COUNT = 16, + // 7.4.3.3.1: pps_pic_parameter_set_id is in [0, 63]. + HEVC_MAX_PPS_COUNT = 64, + + // A.4.2: MaxDpbSize is bounded above by 16. + HEVC_MAX_DPB_SIZE = 16, + // 7.4.3.1: vps_max_dec_pic_buffering_minus1[i] is in [0, MaxDpbSize - 1]. + HEVC_MAX_REFS = HEVC_MAX_DPB_SIZE, + + // 7.4.3.2.1: num_short_term_ref_pic_sets is in [0, 64]. + HEVC_MAX_SHORT_TERM_REF_PIC_SETS = 64, + // 7.4.3.2.1: num_long_term_ref_pics_sps is in [0, 32]. + HEVC_MAX_LONG_TERM_REF_PICS = 32, -#define HEVC_MAX_REFS 16 -#define HEVC_MAX_DPB_SIZE 16 // A.4.1 + // A.3: all profiles require that CtbLog2SizeY is in [4, 6]. + HEVC_MIN_LOG2_CTB_SIZE = 4, + HEVC_MAX_LOG2_CTB_SIZE = 6, + + // E.3.2: cpb_cnt_minus1[i] is in [0, 31]. + HEVC_MAX_CPB_CNT = 32, + + // A.4.1: in table A.6 the highest level allows a MaxLumaPs of 35 651 584. + HEVC_MAX_LUMA_PS = 35651584, + // A.4.1: pic_width_in_luma_samples and pic_height_in_luma_samples are + // constrained to be not greater than sqrt(MaxLumaPs * 8). Hence height/ + // width are bounded above by sqrt(8 * 35651584) = 16888.2 samples. + HEVC_MAX_WIDTH = 16888, + HEVC_MAX_HEIGHT = 16888, + + // A.4.1: table A.6 allows at most 22 tile rows for any level. + HEVC_MAX_TILE_ROWS = 22, + // A.4.1: table A.6 allows at most 20 tile columns for any level. + HEVC_MAX_TILE_COLUMNS = 20, + + // 7.4.7.1: in the worst case (tiles_enabled_flag and + // entropy_coding_sync_enabled_flag are both set), entry points can be + // placed at the beginning of every Ctb row in every tile, giving an + // upper bound of (num_tile_columns_minus1 + 1) * PicHeightInCtbsY - 1. + // Only a stream with very high resolution and perverse parameters could + // get near that, though, so set a lower limit here with the maximum + // possible value for 4K video (at most 135 16x16 Ctb rows). + HEVC_MAX_ENTRY_POINT_OFFSETS = HEVC_MAX_TILE_COLUMNS * 135, +}; -#define HEVC_MAX_LOG2_CTB_SIZE 6 #endif /* AVCODEC_HEVC_H */ diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c index 902917d..72d02c8 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -1061,7 +1061,7 @@ int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id, } sps->nb_st_rps = get_ue_golomb_long(gb); - if (sps->nb_st_rps > HEVC_MAX_SHORT_TERM_RPS_COUNT) { + if (sps->nb_st_rps > HEVC_MAX_SHORT_TERM_REF_PIC_SETS) { av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n", sps->nb_st_rps); return AVERROR_INVALIDDATA; diff --git a/libavcodec/hevc_ps.h b/libavcodec/hevc_ps.h index 76f8eb3..477ee42 100644 --- a/libavcodec/hevc_ps.h +++ b/libavcodec/hevc_ps.h @@ -254,14 +254,14 @@ typedef struct HEVCSPS { ScalingList scaling_list; unsigned int nb_st_rps; - ShortTermRPS st_rps[HEVC_MAX_SHORT_TERM_RPS_COUNT]; + ShortTermRPS st_rps[HEVC_MAX_SHORT_TERM_REF_PIC_SETS]; uint8_t amp_enabled_flag; uint8_t sao_enabled; uint8_t long_term_ref_pics_present_flag; - uint16_t lt_ref_pic_poc_lsb_sps[32]; - uint8_t used_by_curr_pic_lt_sps_flag[32]; + uint16_t lt_ref_pic_poc_lsb_sps[HEVC_MAX_LONG_TERM_REF_PICS]; + uint8_t used_by_curr_pic_lt_sps_flag[HEVC_MAX_LONG_TERM_REF_PICS]; uint8_t num_long_term_ref_pics_sps; struct { |
