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lavc/h265: Add some common code for profile/tier/level handling

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Adds support for determining for level limits, including mapping PTL
blocks to profiles to check profile-dependent level limits.
This commit is contained in:
Mark Thompson 2018-09-18 23:31:04 +01:00
parent 61aea24662
commit 59dd91c768
2 changed files with 334 additions and 0 deletions
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libavcodec/h265_profile_level.c Normal file
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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "h265_profile_level.h"
static const H265LevelDescriptor h265_levels[] = {
// Name CpbFactor-Main MaxSliceSegmentsPerPicture
// | level_idc | CpbFactor-High MaxLumaSr BrFactor-High
// | | MaxLumaPs | | | MaxTileRows | BrFactor-Main | MinCr-Main
// | | | | | | | MaxTileCols | | | MinCr-High
{ "1", 30, 36864, 350, 0, 16, 1, 1, 552960, 128, 0, 2, 2 },
{ "2", 60, 122880, 1500, 0, 16, 1, 1, 3686400, 1500, 0, 2, 2 },
{ "2.1", 63, 245760, 3000, 0, 20, 1, 1, 7372800, 3000, 0, 2, 2 },
{ "3", 90, 552960, 6000, 0, 30, 2, 2, 16588800, 6000, 0, 2, 2 },
{ "3.1", 93, 983040, 10000, 0, 40, 3, 3, 33177600, 10000, 0, 2, 2 },
{ "4", 120, 2228224, 12000, 30000, 75, 5, 5, 66846720, 12000, 30000, 4, 4 },
{ "4.1", 123, 2228224, 20000, 50000, 75, 5, 5, 133693440, 20000, 50000, 4, 4 },
{ "5", 150, 8912896, 25000, 100000, 200, 11, 10, 267386880, 25000, 100000, 6, 4 },
{ "5.1", 153, 8912896, 40000, 160000, 200, 11, 10, 534773760, 40000, 160000, 8, 4 },
{ "5.2", 156, 8912896, 60000, 240000, 200, 11, 10, 1069547520, 60000, 240000, 8, 4 },
{ "6", 180, 35651584, 60000, 240000, 600, 22, 20, 1069547520, 60000, 240000, 8, 4 },
{ "6.1", 183, 35651584, 120000, 480000, 600, 22, 20, 2139095040, 120000, 480000, 8, 4 },
{ "6.2", 186, 35651584, 240000, 800000, 600, 22, 20, 4278190080, 240000, 800000, 6, 4 },
};
static const H265ProfileDescriptor h265_profiles[] = {
// profile_idc 8bit one-picture
// HT-profile | 422chroma | lower-bit-rate
// | 14bit | | 420chroma | | CpbVclFactor MinCrScaleFactor
// | | 12bit | | | monochrome| | CpbNalFactor |
// | | | 10bit | | | intra | | | FormatCapabilityFactor
{ "Monochrome", // | | | | | | | | | |
4, 0, 2, 1, 1, 1, 1, 1, 1, 0, 0, 1, 667, 733, 1.000, 1.0 },
{ "Monochrome 12",
4, 0, 2, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1000, 1100, 1.500, 1.0 },
{ "Monochrome 16",
4, 0, 2, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1333, 1467, 2.000, 1.0 },
{ "Main",
1, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1000, 1100, 1.500, 1.0 },
{ "Screen-Extended Main",
9, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1000, 1100, 1.500, 1.0 },
{ "Main 10",
2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1000, 1100, 1.875, 1.0 },
{ "Screen-Extended Main 10",
9, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1000, 1100, 1.875, 1.0 },
{ "Main 12",
4, 0, 2, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1500, 1650, 2.250, 1.0 },
{ "Main Still Picture",
3, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1000, 1100, 1.500, 1.0 },
{ "Main 4:2:2 10",
4, 0, 2, 1, 1, 0, 1, 0, 0, 0, 0, 1, 1667, 1833, 2.500, 0.5 },
{ "Main 4:2:2 12",
4, 0, 2, 1, 0, 0, 1, 0, 0, 0, 0, 1, 2000, 2200, 3.000, 0.5 },
{ "Main 4:4:4",
4, 0, 2, 1, 1, 1, 0, 0, 0, 0, 0, 1, 2000, 2200, 3.000, 0.5 },
{ "High Throughput 4:4:4",
5, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 2000, 2200, 3.000, 0.5 },
{ "Screen-Extended Main 4:4:4",
9, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 2000, 2200, 3.000, 0.5 },
{ "Screen-Extended High Throughput 4:4:4",
9, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 2000, 2200, 3.000, 0.5 },
{ "Main 4:4:4 10",
4, 0, 2, 1, 1, 0, 0, 0, 0, 0, 0, 1, 2500, 2750, 3.750, 0.5 },
{ "High Throughput 4:4:4 10",
5, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 2500, 2750, 3.750, 0.5 },
{ "Screen-Extended Main 4:4:4 10",
9, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 2500, 2750, 3.750, 0.5 },
{ "Screen-Extended High Throughput 4:4:4 10",
9, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 2500, 2750, 3.750, 0.5 },
{ "Main 4:4:4 12",
4, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 1, 3000, 3300, 4.500, 0.5 },
{ "High Throughput 4:4:4 14",
5, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3500, 3850, 5.250, 0.5 },
{ "Screen-Extended High Throughput 4:4:4 14",
9, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3500, 3850, 5.250, 0.5 },
{ "Main Intra",
4, 0, 2, 1, 1, 1, 1, 1, 0, 1, 0, 2, 1000, 1100, 1.500, 1.0 },
{ "Main 10 Intra",
4, 0, 2, 1, 1, 0, 1, 1, 0, 1, 0, 2, 1000, 1100, 1.875, 1.0 },
{ "Main 12 Intra",
4, 0, 2, 1, 0, 0, 1, 1, 0, 1, 0, 2, 1500, 1650, 2.250, 1.0 },
{ "Main 4:2:2 10 Intra",
4, 0, 2, 1, 1, 0, 1, 0, 0, 1, 0, 2, 1667, 1833, 2.500, 0.5 },
{ "Main 4:2:2 12 Intra",
4, 0, 2, 1, 0, 0, 1, 0, 0, 1, 0, 2, 2000, 2200, 3.000, 0.5 },
{ "Main 4:4:4 Intra",
4, 0, 2, 1, 1, 1, 0, 0, 0, 1, 0, 2, 2000, 2200, 3.000, 0.5 },
{ "Main 4:4:4 10 Intra",
4, 0, 2, 1, 1, 0, 0, 0, 0, 1, 0, 2, 2500, 2750, 3.750, 0.5 },
{ "Main 4:4:4 12 Intra",
4, 0, 2, 1, 0, 0, 0, 0, 0, 1, 0, 2, 3000, 3300, 4.500, 0.5 },
{ "Main 4:4:4 16 Intra",
4, 0, 2, 0, 0, 0, 0, 0, 0, 1, 0, 2, 4000, 4400, 6.000, 0.5 },
{ "Main 4:4:4 Still Picture",
4, 0, 2, 1, 1, 1, 0, 0, 0, 1, 1, 2, 2000, 2200, 3.000, 0.5 },
{ "Main 4:4:4 16 Still Picture",
4, 0, 2, 0, 0, 0, 0, 0, 0, 1, 1, 2, 4000, 4400, 6.000, 0.5 },
{ "High Throughput 4:4:4 16 Intra",
5, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 4000, 4400, 6.000, 0.5 },
};
const H265LevelDescriptor *ff_h265_get_level(int level_idc)
{
int i;
for (i = 0; i < FF_ARRAY_ELEMS(h265_levels); i++) {
if (h265_levels[i].level_idc == level_idc)
return &h265_levels[i];
}
return NULL;
}
const H265ProfileDescriptor *ff_h265_get_profile(const H265RawProfileTierLevel *ptl)
{
int i;
if (ptl->general_profile_space)
return NULL;
for (i = 0; i < FF_ARRAY_ELEMS(h265_profiles); i++) {
const H265ProfileDescriptor *profile = &h265_profiles[i];
if (ptl->general_profile_idc &&
ptl->general_profile_idc != profile->profile_idc)
continue;
if (!ptl->general_profile_compatibility_flag[profile->profile_idc])
continue;
#define check_flag(name) \
if (profile->name < 2) { \
if (profile->name != ptl->general_ ## name ## _constraint_flag) \
continue; \
}
check_flag(max_14bit);
check_flag(max_12bit);
check_flag(max_10bit);
check_flag(max_8bit);
check_flag(max_422chroma);
check_flag(max_420chroma);
check_flag(max_monochrome);
check_flag(intra);
check_flag(one_picture_only);
check_flag(lower_bit_rate);
#undef check_flag
return profile;
}
return NULL;
}
const H265LevelDescriptor *ff_h265_guess_level(const H265RawProfileTierLevel *ptl,
int64_t bitrate,
int width, int height,
int slice_segments,
int tile_rows, int tile_cols,
int max_dec_pic_buffering)
{
const H265ProfileDescriptor *profile;
int pic_size, hbr_factor;
int i;
if (ptl)
profile = ff_h265_get_profile(ptl);
else
profile = NULL;
if (!profile) {
// Default to using multiplication factors for Main profile.
profile = &h265_profiles[3];
}
pic_size = width * height;
if (profile->profile_idc == 1 || profile->profile_idc == 2) {
hbr_factor = 1;
} else if (profile->high_throughput) {
if (profile->intra)
hbr_factor = 24 - 12 * ptl->general_lower_bit_rate_constraint_flag;
else
hbr_factor = 6;
} else {
hbr_factor = 2 - ptl->general_lower_bit_rate_constraint_flag;
}
for (i = 0; i < FF_ARRAY_ELEMS(h265_levels); i++) {
const H265LevelDescriptor *level = &h265_levels[i];
int max_br, max_dpb_size;
if (pic_size > level->max_luma_ps)
continue;
if (width * width > 8 * level->max_luma_ps)
continue;
if (height * height > 8 * level->max_luma_ps)
continue;
if (slice_segments > level->max_slice_segments_per_picture)
continue;
if (tile_rows > level->max_tile_rows)
continue;
if (tile_cols > level->max_tile_cols)
continue;
if (ptl->general_tier_flag)
max_br = level->max_br_high;
else
max_br = level->max_br_main;
if (!max_br)
continue;
if (bitrate > profile->cpb_nal_factor * hbr_factor * max_br)
continue;
if (pic_size < (level->max_luma_ps >> 2))
max_dpb_size = 16;
else if (pic_size < (level->max_luma_ps >> 1))
max_dpb_size = 14;
else if (pic_size < (3 * level->max_luma_ps >> 2))
max_dpb_size = 9;
else
max_dpb_size = 7;
if (max_dec_pic_buffering > max_dpb_size)
continue;
return level;
}
return NULL;
}

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_H265_PROFILE_LEVEL_H
#define AVCODEC_H265_PROFILE_LEVEL_H
#include <stdint.h>
#include "cbs_h265.h"
typedef struct H265LevelDescriptor {
const char *name;
uint8_t level_idc;
// Table A.6.
uint32_t max_luma_ps;
uint32_t max_cpb_main;
uint32_t max_cpb_high;
uint16_t max_slice_segments_per_picture;
uint8_t max_tile_rows;
uint8_t max_tile_cols;
// Table A.7.
uint32_t max_luma_sr;
uint32_t max_br_main;
uint32_t max_br_high;
uint8_t min_cr_base_main;
uint8_t min_cr_base_high;
} H265LevelDescriptor;
typedef struct H265ProfileDescriptor {
const char *name;
uint8_t profile_idc;
uint8_t high_throughput;
// Tables A.2, A.3 and A.5.
uint8_t max_14bit;
uint8_t max_12bit;
uint8_t max_10bit;
uint8_t max_8bit;
uint8_t max_422chroma;
uint8_t max_420chroma;
uint8_t max_monochrome;
uint8_t intra;
uint8_t one_picture_only;
uint8_t lower_bit_rate;
// Table A.8.
uint16_t cpb_vcl_factor;
uint16_t cpb_nal_factor;
float format_capability_factor;
float min_cr_scale_factor;
} H265ProfileDescriptor;
const H265LevelDescriptor *ff_h265_get_level(int level_idc);
const H265ProfileDescriptor *ff_h265_get_profile(const H265RawProfileTierLevel *ptl);
/**
* Guess the level of a stream from some parameters.
*
* Unknown parameters may be zero, in which case they are ignored.
*/
const H265LevelDescriptor *ff_h265_guess_level(const H265RawProfileTierLevel *ptl,
int64_t bitrate,
int width, int height,
int slice_segments,
int tile_rows, int tile_cols,
int max_dec_pic_buffering);
#endif /* AVCODEC_H265_PROFILE_LEVEL_H */