diff options
Diffstat (limited to 'src/video_core/host1x/codecs/h264.h')
| -rw-r--r-- | src/video_core/host1x/codecs/h264.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/video_core/host1x/codecs/h264.h b/src/video_core/host1x/codecs/h264.h new file mode 100644 index 000000000..a98730474 --- /dev/null +++ b/src/video_core/host1x/codecs/h264.h @@ -0,0 +1,173 @@ +// SPDX-FileCopyrightText: Ryujinx Team and Contributors +// SPDX-License-Identifier: MIT + +#pragma once + +#include <span> +#include <vector> +#include "common/bit_field.h" +#include "common/common_funcs.h" +#include "common/common_types.h" +#include "video_core/host1x/nvdec_common.h" + +namespace Tegra { +class GPU; +namespace Decoder { + +class H264BitWriter { +public: + H264BitWriter(); + ~H264BitWriter(); + + /// The following Write methods are based on clause 9.1 in the H.264 specification. + /// WriteSe and WriteUe write in the Exp-Golomb-coded syntax + void WriteU(s32 value, s32 value_sz); + void WriteSe(s32 value); + void WriteUe(u32 value); + + /// Finalize the bitstream + void End(); + + /// append a bit to the stream, equivalent value to the state parameter + void WriteBit(bool state); + + /// Based on section 7.3.2.1.1.1 and Table 7-4 in the H.264 specification + /// Writes the scaling matrices of the sream + void WriteScalingList(std::span<const u8> list, s32 start, s32 count); + + /// Return the bitstream as a vector. + [[nodiscard]] std::vector<u8>& GetByteArray(); + [[nodiscard]] const std::vector<u8>& GetByteArray() const; + +private: + void WriteBits(s32 value, s32 bit_count); + void WriteExpGolombCodedInt(s32 value); + void WriteExpGolombCodedUInt(u32 value); + [[nodiscard]] s32 GetFreeBufferBits(); + void Flush(); + + s32 buffer_size{8}; + + s32 buffer{}; + s32 buffer_pos{}; + std::vector<u8> byte_array; +}; + +class H264 { +public: + explicit H264(GPU& gpu); + ~H264(); + + /// Compose the H264 frame for FFmpeg decoding + [[nodiscard]] const std::vector<u8>& ComposeFrame( + const Host1x::NvdecCommon::NvdecRegisters& state, bool is_first_frame = false); + +private: + std::vector<u8> frame; + GPU& gpu; + + struct H264ParameterSet { + s32 log2_max_pic_order_cnt_lsb_minus4; ///< 0x00 + s32 delta_pic_order_always_zero_flag; ///< 0x04 + s32 frame_mbs_only_flag; ///< 0x08 + u32 pic_width_in_mbs; ///< 0x0C + u32 frame_height_in_map_units; ///< 0x10 + union { ///< 0x14 + BitField<0, 2, u32> tile_format; + BitField<2, 3, u32> gob_height; + }; + u32 entropy_coding_mode_flag; ///< 0x18 + s32 pic_order_present_flag; ///< 0x1C + s32 num_refidx_l0_default_active; ///< 0x20 + s32 num_refidx_l1_default_active; ///< 0x24 + s32 deblocking_filter_control_present_flag; ///< 0x28 + s32 redundant_pic_cnt_present_flag; ///< 0x2C + u32 transform_8x8_mode_flag; ///< 0x30 + u32 pitch_luma; ///< 0x34 + u32 pitch_chroma; ///< 0x38 + u32 luma_top_offset; ///< 0x3C + u32 luma_bot_offset; ///< 0x40 + u32 luma_frame_offset; ///< 0x44 + u32 chroma_top_offset; ///< 0x48 + u32 chroma_bot_offset; ///< 0x4C + u32 chroma_frame_offset; ///< 0x50 + u32 hist_buffer_size; ///< 0x54 + union { ///< 0x58 + union { + BitField<0, 1, u64> mbaff_frame; + BitField<1, 1, u64> direct_8x8_inference; + BitField<2, 1, u64> weighted_pred; + BitField<3, 1, u64> constrained_intra_pred; + BitField<4, 1, u64> ref_pic; + BitField<5, 1, u64> field_pic; + BitField<6, 1, u64> bottom_field; + BitField<7, 1, u64> second_field; + } flags; + BitField<8, 4, u64> log2_max_frame_num_minus4; + BitField<12, 2, u64> chroma_format_idc; + BitField<14, 2, u64> pic_order_cnt_type; + BitField<16, 6, s64> pic_init_qp_minus26; + BitField<22, 5, s64> chroma_qp_index_offset; + BitField<27, 5, s64> second_chroma_qp_index_offset; + BitField<32, 2, u64> weighted_bipred_idc; + BitField<34, 7, u64> curr_pic_idx; + BitField<41, 5, u64> curr_col_idx; + BitField<46, 16, u64> frame_number; + BitField<62, 1, u64> frame_surfaces; + BitField<63, 1, u64> output_memory_layout; + }; + }; + static_assert(sizeof(H264ParameterSet) == 0x60, "H264ParameterSet is an invalid size"); + + struct H264DecoderContext { + INSERT_PADDING_WORDS_NOINIT(18); ///< 0x0000 + u32 stream_len; ///< 0x0048 + INSERT_PADDING_WORDS_NOINIT(3); ///< 0x004C + H264ParameterSet h264_parameter_set; ///< 0x0058 + INSERT_PADDING_WORDS_NOINIT(66); ///< 0x00B8 + std::array<u8, 0x60> weight_scale; ///< 0x01C0 + std::array<u8, 0x80> weight_scale_8x8; ///< 0x0220 + }; + static_assert(sizeof(H264DecoderContext) == 0x2A0, "H264DecoderContext is an invalid size"); + +#define ASSERT_POSITION(field_name, position) \ + static_assert(offsetof(H264ParameterSet, field_name) == position, \ + "Field " #field_name " has invalid position") + + ASSERT_POSITION(log2_max_pic_order_cnt_lsb_minus4, 0x00); + ASSERT_POSITION(delta_pic_order_always_zero_flag, 0x04); + ASSERT_POSITION(frame_mbs_only_flag, 0x08); + ASSERT_POSITION(pic_width_in_mbs, 0x0C); + ASSERT_POSITION(frame_height_in_map_units, 0x10); + ASSERT_POSITION(tile_format, 0x14); + ASSERT_POSITION(entropy_coding_mode_flag, 0x18); + ASSERT_POSITION(pic_order_present_flag, 0x1C); + ASSERT_POSITION(num_refidx_l0_default_active, 0x20); + ASSERT_POSITION(num_refidx_l1_default_active, 0x24); + ASSERT_POSITION(deblocking_filter_control_present_flag, 0x28); + ASSERT_POSITION(redundant_pic_cnt_present_flag, 0x2C); + ASSERT_POSITION(transform_8x8_mode_flag, 0x30); + ASSERT_POSITION(pitch_luma, 0x34); + ASSERT_POSITION(pitch_chroma, 0x38); + ASSERT_POSITION(luma_top_offset, 0x3C); + ASSERT_POSITION(luma_bot_offset, 0x40); + ASSERT_POSITION(luma_frame_offset, 0x44); + ASSERT_POSITION(chroma_top_offset, 0x48); + ASSERT_POSITION(chroma_bot_offset, 0x4C); + ASSERT_POSITION(chroma_frame_offset, 0x50); + ASSERT_POSITION(hist_buffer_size, 0x54); + ASSERT_POSITION(flags, 0x58); +#undef ASSERT_POSITION + +#define ASSERT_POSITION(field_name, position) \ + static_assert(offsetof(H264DecoderContext, field_name) == position, \ + "Field " #field_name " has invalid position") + + ASSERT_POSITION(stream_len, 0x48); + ASSERT_POSITION(h264_parameter_set, 0x58); + ASSERT_POSITION(weight_scale, 0x1C0); +#undef ASSERT_POSITION +}; + +} // namespace Decoder +} // namespace Tegra |