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https://github.com/yuzu-emu/yuzu.git
synced 2024-09-06 16:59:21 +02:00
vp9: Fix reference frame refreshes
This resolves the artifacting when decoding VP9 streams.
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@ -613,7 +613,7 @@ VpxBitStreamWriter VP9::ComposeUncompressedHeader() {
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// Reset context
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prev_frame_probs = default_probs;
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swap_next_golden = false;
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swap_ref_indices = false;
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loop_filter_ref_deltas.fill(0);
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loop_filter_mode_deltas.fill(0);
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@ -626,73 +626,57 @@ VpxBitStreamWriter VP9::ComposeUncompressedHeader() {
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// intra only, meaning the frame can be recreated with no other references
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current_frame_info.intra_only = true;
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} else {
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if (!current_frame_info.show_frame) {
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uncomp_writer.WriteBit(current_frame_info.intra_only);
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if (!current_frame_info.last_frame_was_key) {
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swap_next_golden = !swap_next_golden;
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}
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} else {
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current_frame_info.intra_only = false;
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}
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if (!current_frame_info.error_resilient_mode) {
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uncomp_writer.WriteU(0, 2); // Reset frame context.
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}
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// Last, Golden, Altref frames
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std::array<s32, 3> ref_frame_index{0, 1, 2};
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// Set when next frame is hidden
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// altref and golden references are swapped
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if (swap_next_golden) {
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ref_frame_index = std::array<s32, 3>{0, 2, 1};
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const auto& curr_offsets = current_frame_info.frame_offsets;
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const auto& next_offsets = next_frame.info.frame_offsets;
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const bool ref_frames_different = curr_offsets[1] != curr_offsets[2];
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const bool next_references_swap =
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(next_offsets[1] == curr_offsets[2]) || (next_offsets[2] == curr_offsets[1]);
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const bool needs_ref_swap = ref_frames_different && next_references_swap;
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if (needs_ref_swap) {
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swap_ref_indices = !swap_ref_indices;
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}
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union {
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u32 raw;
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BitField<0, 1, u32> refresh_last;
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BitField<1, 2, u32> refresh_golden;
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BitField<2, 1, u32> refresh_alt;
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} refresh_frame_flags;
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// update Last Frame
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u64 refresh_frame_flags = 1;
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// golden frame may refresh, determined if the next golden frame offset is changed
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bool golden_refresh = false;
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if (grace_period <= 0) {
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for (s32 index = 1; index < 3; ++index) {
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if (current_frame_info.frame_offsets[index] !=
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next_frame.info.frame_offsets[index]) {
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current_frame_info.refresh_frame[index] = true;
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golden_refresh = true;
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grace_period = 3;
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}
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refresh_frame_flags.raw = 0;
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for (u32 index = 0; index < 3; ++index) {
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// Refresh indices that use the current frame as an index
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if (curr_offsets[3] == next_offsets[index]) {
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refresh_frame_flags.raw |= 1u << index;
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}
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}
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if (current_frame_info.show_frame &&
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(!next_frame.info.show_frame || next_frame.info.is_key_frame)) {
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// Update golden frame
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refresh_frame_flags = swap_next_golden ? 2 : 4;
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if (swap_ref_indices) {
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const u32 temp = refresh_frame_flags.refresh_golden;
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refresh_frame_flags.refresh_golden.Assign(refresh_frame_flags.refresh_alt.Value());
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refresh_frame_flags.refresh_alt.Assign(temp);
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}
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if (!current_frame_info.show_frame) {
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// Update altref
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refresh_frame_flags = swap_next_golden ? 2 : 4;
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} else if (golden_refresh) {
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refresh_frame_flags = 3;
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}
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if (current_frame_info.intra_only) {
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uncomp_writer.WriteU(frame_sync_code, 24);
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uncomp_writer.WriteU(static_cast<s32>(refresh_frame_flags), 8);
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uncomp_writer.WriteU(refresh_frame_flags.raw, 8);
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uncomp_writer.WriteU(current_frame_info.frame_size.width - 1, 16);
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uncomp_writer.WriteU(current_frame_info.frame_size.height - 1, 16);
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uncomp_writer.WriteBit(false); // Render and frame size different.
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} else {
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uncomp_writer.WriteU(static_cast<s32>(refresh_frame_flags), 8);
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for (s32 index = 1; index < 4; index++) {
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const bool swap_indices = needs_ref_swap ^ swap_ref_indices;
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const auto ref_frame_index = swap_indices ? std::array{0, 2, 1} : std::array{0, 1, 2};
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uncomp_writer.WriteU(refresh_frame_flags.raw, 8);
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for (size_t index = 1; index < 4; index++) {
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uncomp_writer.WriteU(ref_frame_index[index - 1], 3);
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uncomp_writer.WriteU(current_frame_info.ref_frame_sign_bias[index], 1);
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}
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uncomp_writer.WriteBit(true); // Frame size with refs.
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uncomp_writer.WriteBit(false); // Render and frame size different.
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uncomp_writer.WriteBit(current_frame_info.allow_high_precision_mv);
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@ -812,7 +796,6 @@ const std::vector<u8>& VP9::ComposeFrameHeader(const NvdecCommon::NvdecRegisters
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current_frame_info = curr_frame.info;
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bitstream = std::move(curr_frame.bit_stream);
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}
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// The uncompressed header routine sets PrevProb parameters needed for the compressed header
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auto uncomp_writer = ComposeUncompressedHeader();
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std::vector<u8> compressed_header = ComposeCompressedHeader();
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@ -184,7 +184,7 @@ private:
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std::array<FrameContexts, 4> frame_ctxs{};
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Vp9FrameContainer next_frame{};
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Vp9FrameContainer next_next_frame{};
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bool swap_next_golden{};
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bool swap_ref_indices{};
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Vp9PictureInfo current_frame_info{};
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Vp9EntropyProbs prev_frame_probs{};
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