[FFmpeg-cvslog] lavc/h265: Add some common code for profile/tier/level handling
Mark Thompson
git at videolan.org
Sun Sep 23 18:48:02 EEST 2018
ffmpeg | branch: master | Mark Thompson <sw at jkqxz.net> | Tue Sep 18 23:31:04 2018 +0100| [59dd91c7682d0a9fa350ecc6dabc7234eb9d369f] | committer: Mark Thompson
lavc/h265: Add some common code for profile/tier/level handling
Adds support for determining for level limits, including mapping PTL
blocks to profiles to check profile-dependent level limits.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=59dd91c7682d0a9fa350ecc6dabc7234eb9d369f
---
libavcodec/h265_profile_level.c | 245 ++++++++++++++++++++++++++++++++++++++++
libavcodec/h265_profile_level.h | 89 +++++++++++++++
2 files changed, 334 insertions(+)
diff --git a/libavcodec/h265_profile_level.c b/libavcodec/h265_profile_level.c
new file mode 100644
index 0000000000..aac1529c9b
--- /dev/null
+++ b/libavcodec/h265_profile_level.c
@@ -0,0 +1,245 @@
+/*
+ * 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;
+}
diff --git a/libavcodec/h265_profile_level.h b/libavcodec/h265_profile_level.h
new file mode 100644
index 0000000000..12c00f0077
--- /dev/null
+++ b/libavcodec/h265_profile_level.h
@@ -0,0 +1,89 @@
+/*
+ * 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 */
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