text: /*
   * 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 "libavutil/common.h"
  #include "libavcodec/h265_profile_level.h"
  
  static const struct {
      int width;
      int height;
      int level_idc;
  } test_sizes[] = {
      // First level usable at standard sizes, from H.265 table A.9.
      {  176,  144,  30 }, // QCIF
      {  352,  288,  60 }, // CIF
      {  640,  480,  90 }, // VGA
      {  720,  480,  90 }, // NTSC
      {  720,  576,  90 }, // PAL
      { 1024,  768,  93 }, // XGA
      { 1280,  720,  93 }, // 720p
      { 1280, 1024, 120 }, // SXGA
      { 1920, 1080, 120 }, // 1080p
      { 2048, 1080, 120 }, // 2Kx1080
      { 2048, 1536, 150 }, // 4XGA
      { 3840, 2160, 150 }, // 4K
      { 7680, 4320, 180 }, // 8K
  
      // Overly wide or tall sizes.
      {     1,   512,  30 },
      {     1,  1024,  63 },
      {     1,  2048,  90 },
      {     1,  4096, 120 },
      {     1,  8192, 150 },
      {     1, 16384, 180 },
      {     1, 32768,   0 },
      {   512,     1,  30 },
      {  1024,     1,  63 },
      {  2048,     1,  90 },
      {  4096,     1, 120 },
      {  8192,     1, 150 },
      { 16384,     1, 180 },
      { 32768,     1,   0 },
      {  2800,   256,  93 },
      {  2816,   128, 120 },
      {   256,  4208, 120 },
      {   128,  4224, 150 },
      {  8432,   256, 150 },
      {  8448,   128, 180 },
      {   256, 16880, 180 },
      {   128, 16896,   0 },
  };
  
  static const struct {
      int width;
      int height;
      int dpb_size;
      int level_idc;
  } test_dpb[] = {
      // First level usable for some DPB sizes.
  
      // L1:   176 * 144 = 25344 <=  36864 * 3/4 = 27648
      // L2:                     <= 122880 * 1/4 = 30720
      {  176,  144,  8,  30 },
      {  176,  144,  9,  60 },
  
      // L2:   352 * 288 = 101376 <= 122880
      // L2.1:                    <= 245760 * 1/2 = 122880
      // L3:                      <= 552960 * 1/4 = 138240
      {  352,  288,  6,  60 },
      {  352,  288,  7,  63 },
      {  352,  288, 13,  90 },
  
      // L3.1: 1280 * 720 = 921600 <= 983040
      // L4:                       <= 2228224 * 1/2 = 1114112
      // L5:                       <= 8912896 * 1/4 = 2228224
      { 1280,  720,  6,  93 },
      { 1280,  720, 12, 120 },
      { 1280,  720, 16, 150 },
  
      // L5:   3840 * 2160 = 8294400 <= 8912896
      // L6:                         <= 35651584 * 1/4 = 8912896
      { 3840, 2160,  6, 150 },
      { 3840, 2160,  7, 180 },
      { 3840, 2160, 16, 180 },
  };
  
  static const H265RawProfileTierLevel profile_main = {
      // CpbNalFactor = 1100
      .general_profile_space = 0,
      .general_profile_idc   = 1,
      .general_tier_flag     = 0,
      .general_profile_compatibility_flag[1] = 1,
  };
  
  static const H265RawProfileTierLevel profile_main_12 = {
      // CpbNalFactor = 1650
      .general_profile_space = 0,
      .general_profile_idc   = 4,
      .general_tier_flag     = 0,
      .general_profile_compatibility_flag[4]    = 1,
      .general_max_12bit_constraint_flag        = 1,
      .general_max_10bit_constraint_flag        = 0,
      .general_max_8bit_constraint_flag         = 0,
      .general_max_422chroma_constraint_flag    = 1,
      .general_max_420chroma_constraint_flag    = 1,
      .general_max_monochrome_constraint_flag   = 0,
      .general_intra_constraint_flag            = 0,
      .general_one_picture_only_constraint_flag = 0,
      .general_lower_bit_rate_constraint_flag   = 1,
  };
  
  static const H265RawProfileTierLevel profile_main_422_12_intra = {
      // CpbNalFactor = 2200
      .general_profile_space = 0,
      .general_profile_idc   = 4,
      .general_tier_flag     = 0,
      .general_profile_compatibility_flag[4]    = 1,
      .general_max_12bit_constraint_flag        = 1,
      .general_max_10bit_constraint_flag        = 0,
      .general_max_8bit_constraint_flag         = 0,
      .general_max_422chroma_constraint_flag    = 1,
      .general_max_420chroma_constraint_flag    = 0,
      .general_max_monochrome_constraint_flag   = 0,
      .general_intra_constraint_flag            = 1,
      .general_one_picture_only_constraint_flag = 0,
  };
  
  static const H265RawProfileTierLevel profile_ht_444_14 = {
      // CpbNalFactor = 3850
      .general_profile_space = 0,
      .general_profile_idc   = 5,
      .general_tier_flag     = 0,
      .general_profile_compatibility_flag[5]    = 1,
      .general_max_14bit_constraint_flag        = 1,
      .general_max_12bit_constraint_flag        = 0,
      .general_max_10bit_constraint_flag        = 0,
      .general_max_8bit_constraint_flag         = 0,
      .general_max_422chroma_constraint_flag    = 0,
      .general_max_420chroma_constraint_flag    = 0,
      .general_max_monochrome_constraint_flag   = 0,
      .general_intra_constraint_flag            = 0,
      .general_one_picture_only_constraint_flag = 0,
      .general_lower_bit_rate_constraint_flag   = 1,
  };
  
  static const H265RawProfileTierLevel profile_main_high_tier = {
      // CpbNalFactor = 1100
      .general_profile_space = 0,
      .general_profile_idc   = 1,
      .general_tier_flag     = 1,
      .general_profile_compatibility_flag[1] = 1,
  };
  
  static const struct {
      int64_t bitrate;
      const H265RawProfileTierLevel *ptl;
      int level_idc;
  } test_bitrate[] = {
      // First level usable for some bitrates and profiles.
  
      // L2.1: 3000 * 1100 = 3300000
      // L3:   6000 * 1100 = 6600000
      {   4000000, &profile_main,               90 },
      // L2:   1500 * 1650 = 2475000
      // L2.1: 3000 * 1650 = 4950000
      {   4000000, &profile_main_12,            63 },
      // L1:    350 * 2200 * 2 = 1540000
      // L2:   1500 * 2200 * 2 = 6600000
      {   4000000, &profile_main_422_12_intra,  60 },
  
      // L5.1: 40000 * 1100 = 44000000
      // L5.2: 60000 * 1100 = 66000000
      {  50000000, &profile_main,              156 },
      // L5:   25000 * 1650 = 41250000
      // L5.1: 40000 * 1650 = 66000000
      {  50000000, &profile_main_12,           153 },
      // L3.1: 10000 * 2200 * 2 = 44000000
      // L4:   12000 * 2200 * 2 = 52800000
      {  50000000, &profile_main_422_12_intra, 120 },
      // L2:    1500 * 3850 * 6 = 34650000
      // L2.1:  3000 * 3850 * 6 = 69300000
      {  50000000, &profile_ht_444_14,          63 },
  
      // Level changes based on tier.
      {      1000, &profile_main,            30 },
      {      1000, &profile_main_high_tier, 120 },
      {  40000000, &profile_main,           153 },
      {  40000000, &profile_main_high_tier, 123 },
      { 200000000, &profile_main,           186 },
      { 200000000, &profile_main_high_tier, 156 },
  
      // Overflowing 32-bit integers.
      // L6:    60000 * 3850 * 6 = 1386000000
      // L6.1: 120000 * 3850 * 6 = 2772000000
      // L6.2: 240000 * 3850 * 6 = 5544000000
      { INT64_C(2700000000), &profile_ht_444_14, 183 },
      { INT64_C(4200000000), &profile_ht_444_14, 186 },
      { INT64_C(5600000000), &profile_ht_444_14,   0 },
  };
  
  static const struct {
      int slice_segments;
      int tile_rows;
      int tile_cols;
      int level_idc;
  } test_fragments[] = {
      // Slices.
      {   4,  1,  1,  30 },
      {  32,  1,  1,  93 },
      {  70,  1,  1, 120 },
      {  80,  1,  1, 150 },
      { 201,  1,  1, 180 },
      { 600,  1,  1, 180 },
      { 601,  1,  1,   0 },
  
      // Tiles.
      {   1,  2,  1,  90 },
      {   1,  1,  2,  90 },
      {   1,  3,  3,  93 },
      {   1,  4,  2, 120 },
      {   1,  2,  4, 120 },
      {   1, 11, 10, 150 },
      {   1, 10, 11, 180 },
      {   1, 22, 20, 180 },
      {   1, 20, 22,   0 },
  };
  
  int main(void)
  {
      const H265ProfileDescriptor *profile;
      const H265LevelDescriptor *level;
      int i;
  
  #define CHECK(expected, format, ...) do { \
          if (expected ? (!level || level->level_idc != expected) \
                       : !!level) { \
              av_log(NULL, AV_LOG_ERROR, "Incorrect level for " \
                     format ": expected %d, got %d.\n", __VA_ARGS__, \
                     expected, level ? level->level_idc : -1); \
              return 1; \
          } \
      } while (0)
  
      for (i = 0; i < FF_ARRAY_ELEMS(test_sizes); i++) {
          level = ff_h265_guess_level(&profile_main, 0,
                                      test_sizes[i].width,
                                      test_sizes[i].height,
                                      0, 0, 0, 0);
          CHECK(test_sizes[i].level_idc, "size %dx%d",
                test_sizes[i].width, test_sizes[i].height);
      }
  
      for (i = 0; i < FF_ARRAY_ELEMS(test_dpb); i++) {
          level = ff_h265_guess_level(&profile_main, 0,
                                      test_dpb[i].width,
                                      test_dpb[i].height,
                                      0, 0, 0, test_dpb[i].dpb_size);
          CHECK(test_dpb[i].level_idc, "size %dx%d dpb %d",
                test_dpb[i].width, test_dpb[i].height,
                test_dpb[i].dpb_size);
      }
  
      for (i = 0; i < FF_ARRAY_ELEMS(test_bitrate); i++) {
          profile = ff_h265_get_profile(test_bitrate[i].ptl);
          level = ff_h265_guess_level(test_bitrate[i].ptl,
                                      test_bitrate[i].bitrate,
                                      0, 0, 0, 0, 0, 0);
          CHECK(test_bitrate[i].level_idc, "bitrate %"PRId64" profile %s",
                test_bitrate[i].bitrate, profile->name);
      }
  
      for (i = 0; i < FF_ARRAY_ELEMS(test_fragments); i++) {
          level = ff_h265_guess_level(&profile_main, 0, 0, 0,
                                      test_fragments[i].slice_segments,
                                      test_fragments[i].tile_rows,
                                      test_fragments[i].tile_cols, 0);
          CHECK(test_fragments[i].level_idc, "%d slices %dx%d tiles",
                test_fragments[i].slice_segments,
                test_fragments[i].tile_cols, test_fragments[i].tile_rows);
      }
  
      return 0;
  }
  