Unified · Split
| @@ -145,6 +145,20 @@ struct EncodeFrameResult { · 144 unmodified lines | ||
| 145 | 145 | int num_rows_4x4; // number of row units, in size of 4. |
| 146 | 146 | int num_cols_4x4; // number of column units, in size of 4. |
| 147 | 147 | // The pointer to the partition information of the frame. |
| 148 | + // The frame is divided 4x4 blocks of |num_rows_4x4| rows and | |
| 149 | + // |num_cols_4x4| columns. | |
| 150 | + // Each 4x4 block contains the current pixel position (|row|, |column|), | |
| 151 | + // the start pixel position of the partition (|row_start|, |column_start|), | |
| 152 | + // and the |width|, |height| of the partition. | |
| 153 | + // Within the same partition, all 4x4 blocks have the same |row_start|, | |
| 154 | + // |column_start|, |width| and |height|. | |
| 155 | + // For example, if the frame is partitioned to a 32x32 block, | |
| 156 | + // starting at (0, 0). Then, there're 64 4x4 blocks within this partition. | |
| 157 | + // They all have the same |row_start|, |column_start|, |width|, |height|, | |
| 158 | + // which can be used to figure out the start of the current partition and | |
| 159 | + // the start of the next partition block. | |
| 160 | + // Horizontal next: |column_start| + |width|, | |
| 161 | + // Vertical next: |row_start| + |height|. | |
| 148 | 162 | std::unique_ptr<PartitionInfo[]> partition_info; |
| 149 | 163 | }; |
| 150 | 164 | |