diff options
Diffstat (limited to 'src/frame_scratch_buffer.h')
| -rw-r--r-- | src/frame_scratch_buffer.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/frame_scratch_buffer.h b/src/frame_scratch_buffer.h index 90c3bb8..1b0d2e0 100644 --- a/src/frame_scratch_buffer.h +++ b/src/frame_scratch_buffer.h @@ -17,10 +17,13 @@ #ifndef LIBGAV1_SRC_FRAME_SCRATCH_BUFFER_H_ #define LIBGAV1_SRC_FRAME_SCRATCH_BUFFER_H_ +#include <array> #include <condition_variable> // NOLINT (unapproved c++11 header) #include <cstdint> #include <memory> #include <mutex> // NOLINT (unapproved c++11 header) +#include <new> +#include <utility> #include "src/loop_restoration_info.h" #include "src/residual_buffer_pool.h" @@ -46,9 +49,24 @@ using IntraPredictionBuffer = // Buffer to facilitate decoding a frame. This struct is used only within // DecoderImpl::DecodeTiles(). -struct FrameScratchBuffer { +// The alignment requirement is due to the SymbolDecoderContext member +// symbol_decoder_context and the TileScratchBufferPool member +// tile_scratch_buffer_pool. +struct FrameScratchBuffer : public MaxAlignedAllocable { LoopRestorationInfo loop_restoration_info; - Array2D<int16_t> cdef_index; + Array2D<int8_t> cdef_index; + // Encodes the block skip information as a bitmask for the entire frame which + // will be used by the cdef process. + // + // * The size of this array is rows4x4 / 2 * column4x4 / 16. + // * Each row of the bitmasks array (cdef_skip) stores the bitmask for 2 rows + // of 4x4 blocks. + // * Each entry in the row will store the skip information for 16 4x4 blocks + // (8 bits). + // * If any of the four 4x4 blocks in the 8x8 block is not a skip block, then + // the corresponding bit (as described below) will be set to 1. + // * For the 4x4 block at column4x4 the bit index is (column4x4 >> 1). + Array2D<uint8_t> cdef_skip; Array2D<TransformSize> inter_transform_sizes; BlockParametersHolder block_parameters_holder; TemporalMotionField motion_field; |