diff options
Diffstat (limited to 'src/video_core/command_classes/codecs/vp9.cpp')
| -rw-r--r-- | src/video_core/command_classes/codecs/vp9.cpp | 134 |
1 files changed, 45 insertions, 89 deletions
diff --git a/src/video_core/command_classes/codecs/vp9.cpp b/src/video_core/command_classes/codecs/vp9.cpp index 902bc2a98..7eecb3991 100644 --- a/src/video_core/command_classes/codecs/vp9.cpp +++ b/src/video_core/command_classes/codecs/vp9.cpp @@ -11,6 +11,9 @@ namespace Tegra::Decoder { namespace { +constexpr u32 diff_update_probability = 252; +constexpr u32 frame_sync_code = 0x498342; + // Default compressed header probabilities once frame context resets constexpr Vp9EntropyProbs default_probs{ .y_mode_prob{ @@ -361,8 +364,7 @@ Vp9PictureInfo VP9::GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state) InsertEntropy(state.vp9_entropy_probs_offset, vp9_info.entropy); // surface_luma_offset[0:3] contains the address of the reference frame offsets in the following - // order: last, golden, altref, current. It may be worthwhile to track the updates done here - // to avoid buffering frame data needed for reference frame updating in the header composition. + // order: last, golden, altref, current. std::copy(state.surface_luma_offset.begin(), state.surface_luma_offset.begin() + 4, vp9_info.frame_offsets.begin()); @@ -384,33 +386,18 @@ Vp9FrameContainer VP9::GetCurrentFrame(const NvdecCommon::NvdecRegisters& state) gpu.MemoryManager().ReadBlock(state.frame_bitstream_offset, current_frame.bit_stream.data(), current_frame.info.bitstream_size); } - // Buffer two frames, saving the last show frame info - if (!next_next_frame.bit_stream.empty()) { + if (!next_frame.bit_stream.empty()) { Vp9FrameContainer temp{ .info = current_frame.info, .bit_stream = std::move(current_frame.bit_stream), }; - next_next_frame.info.show_frame = current_frame.info.last_frame_shown; - current_frame.info = next_next_frame.info; - current_frame.bit_stream = std::move(next_next_frame.bit_stream); - next_next_frame = std::move(temp); - - if (!next_frame.bit_stream.empty()) { - Vp9FrameContainer temp2{ - .info = current_frame.info, - .bit_stream = std::move(current_frame.bit_stream), - }; - next_frame.info.show_frame = current_frame.info.last_frame_shown; - current_frame.info = next_frame.info; - current_frame.bit_stream = std::move(next_frame.bit_stream); - next_frame = std::move(temp2); - } else { - next_frame.info = current_frame.info; - next_frame.bit_stream = std::move(current_frame.bit_stream); - } + next_frame.info.show_frame = current_frame.info.last_frame_shown; + current_frame.info = next_frame.info; + current_frame.bit_stream = std::move(next_frame.bit_stream); + next_frame = std::move(temp); } else { - next_next_frame.info = current_frame.info; - next_next_frame.bit_stream = std::move(current_frame.bit_stream); + next_frame.info = current_frame.info; + next_frame.bit_stream = std::move(current_frame.bit_stream); } return current_frame; } @@ -613,86 +600,64 @@ VpxBitStreamWriter VP9::ComposeUncompressedHeader() { // Reset context prev_frame_probs = default_probs; - swap_next_golden = false; + swap_ref_indices = false; loop_filter_ref_deltas.fill(0); loop_filter_mode_deltas.fill(0); - - // allow frames offsets to stabilize before checking for golden frames - grace_period = 4; - - // On key frames, all frame slots are set to the current frame, - // so the value of the selected slot doesn't really matter. - frame_ctxs.fill({current_frame_number, false, default_probs}); + frame_ctxs.fill(default_probs); // intra only, meaning the frame can be recreated with no other references current_frame_info.intra_only = true; - } else { - if (!current_frame_info.show_frame) { uncomp_writer.WriteBit(current_frame_info.intra_only); - if (!current_frame_info.last_frame_was_key) { - swap_next_golden = !swap_next_golden; - } } else { current_frame_info.intra_only = false; } if (!current_frame_info.error_resilient_mode) { uncomp_writer.WriteU(0, 2); // Reset frame context. } - - // Last, Golden, Altref frames - std::array<s32, 3> ref_frame_index{0, 1, 2}; - - // Set when next frame is hidden - // altref and golden references are swapped - if (swap_next_golden) { - ref_frame_index = std::array<s32, 3>{0, 2, 1}; + const auto& curr_offsets = current_frame_info.frame_offsets; + const auto& next_offsets = next_frame.info.frame_offsets; + const bool ref_frames_different = curr_offsets[1] != curr_offsets[2]; + const bool next_references_swap = + (next_offsets[1] == curr_offsets[2]) || (next_offsets[2] == curr_offsets[1]); + const bool needs_ref_swap = ref_frames_different && next_references_swap; + if (needs_ref_swap) { + swap_ref_indices = !swap_ref_indices; } - - // update Last Frame - u64 refresh_frame_flags = 1; - - // golden frame may refresh, determined if the next golden frame offset is changed - bool golden_refresh = false; - if (grace_period <= 0) { - for (s32 index = 1; index < 3; ++index) { - if (current_frame_info.frame_offsets[index] != - next_frame.info.frame_offsets[index]) { - current_frame_info.refresh_frame[index] = true; - golden_refresh = true; - grace_period = 3; - } + union { + u32 raw; + BitField<0, 1, u32> refresh_last; + BitField<1, 2, u32> refresh_golden; + BitField<2, 1, u32> refresh_alt; + } refresh_frame_flags; + + refresh_frame_flags.raw = 0; + for (u32 index = 0; index < 3; ++index) { + // Refresh indices that use the current frame as an index + if (curr_offsets[3] == next_offsets[index]) { + refresh_frame_flags.raw |= 1u << index; } } - - if (current_frame_info.show_frame && - (!next_frame.info.show_frame || next_frame.info.is_key_frame)) { - // Update golden frame - refresh_frame_flags = swap_next_golden ? 2 : 4; - } - - if (!current_frame_info.show_frame) { - // Update altref - refresh_frame_flags = swap_next_golden ? 2 : 4; - } else if (golden_refresh) { - refresh_frame_flags = 3; + if (swap_ref_indices) { + const u32 temp = refresh_frame_flags.refresh_golden; + refresh_frame_flags.refresh_golden.Assign(refresh_frame_flags.refresh_alt.Value()); + refresh_frame_flags.refresh_alt.Assign(temp); } - if (current_frame_info.intra_only) { uncomp_writer.WriteU(frame_sync_code, 24); - uncomp_writer.WriteU(static_cast<s32>(refresh_frame_flags), 8); + uncomp_writer.WriteU(refresh_frame_flags.raw, 8); uncomp_writer.WriteU(current_frame_info.frame_size.width - 1, 16); uncomp_writer.WriteU(current_frame_info.frame_size.height - 1, 16); uncomp_writer.WriteBit(false); // Render and frame size different. } else { - uncomp_writer.WriteU(static_cast<s32>(refresh_frame_flags), 8); - - for (s32 index = 1; index < 4; index++) { + const bool swap_indices = needs_ref_swap ^ swap_ref_indices; + const auto ref_frame_index = swap_indices ? std::array{0, 2, 1} : std::array{0, 1, 2}; + uncomp_writer.WriteU(refresh_frame_flags.raw, 8); + for (size_t index = 1; index < 4; index++) { uncomp_writer.WriteU(ref_frame_index[index - 1], 3); uncomp_writer.WriteU(current_frame_info.ref_frame_sign_bias[index], 1); } - uncomp_writer.WriteBit(true); // Frame size with refs. uncomp_writer.WriteBit(false); // Render and frame size different. uncomp_writer.WriteBit(current_frame_info.allow_high_precision_mv); @@ -714,10 +679,9 @@ VpxBitStreamWriter VP9::ComposeUncompressedHeader() { frame_ctx_idx = 1; } - uncomp_writer.WriteU(frame_ctx_idx, 2); // Frame context index. - prev_frame_probs = - frame_ctxs[frame_ctx_idx].probs; // reference probabilities for compressed header - frame_ctxs[frame_ctx_idx] = {current_frame_number, false, current_frame_info.entropy}; + uncomp_writer.WriteU(frame_ctx_idx, 2); // Frame context index. + prev_frame_probs = frame_ctxs[frame_ctx_idx]; // reference probabilities for compressed header + frame_ctxs[frame_ctx_idx] = current_frame_info.entropy; uncomp_writer.WriteU(current_frame_info.first_level, 6); uncomp_writer.WriteU(current_frame_info.sharpness_level, 3); @@ -812,7 +776,6 @@ const std::vector<u8>& VP9::ComposeFrameHeader(const NvdecCommon::NvdecRegisters current_frame_info = curr_frame.info; bitstream = std::move(curr_frame.bit_stream); } - // The uncompressed header routine sets PrevProb parameters needed for the compressed header auto uncomp_writer = ComposeUncompressedHeader(); std::vector<u8> compressed_header = ComposeCompressedHeader(); @@ -828,13 +791,6 @@ const std::vector<u8>& VP9::ComposeFrameHeader(const NvdecCommon::NvdecRegisters frame.begin() + uncompressed_header.size()); std::copy(bitstream.begin(), bitstream.end(), frame.begin() + uncompressed_header.size() + compressed_header.size()); - - // keep track of frame number - current_frame_number++; - grace_period--; - - // don't display hidden frames - hidden = !current_frame_info.show_frame; return frame; } |