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vp9: Cleanup unused variables

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With reference frames refreshes fix, we no longer need to buffer two frames in advance.
We can also remove other unused or otherwise unneeded variables.
This commit is contained in:
ameerj 2021-08-02 00:08:41 -04:00
parent a3f80a97a3
commit e3688f0627
3 changed files with 17 additions and 58 deletions
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57
src/video_core/command_classes/codecs/vp9.cpp
View file

@ -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;
}
@ -616,13 +603,7 @@ VpxBitStreamWriter VP9::ComposeUncompressedHeader() {
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;
@ -698,10 +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);
@ -811,13 +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;
}

12
src/video_core/command_classes/codecs/vp9.h
View file

@ -14,7 +14,6 @@
namespace Tegra {
class GPU;
enum class FrameType { KeyFrame = 0, InterFrame = 1 };
namespace Decoder {
/// The VpxRangeEncoder, and VpxBitStreamWriter classes are used to compose the
@ -124,7 +123,7 @@ public:
/// Returns true if the most recent frame was a hidden frame.
[[nodiscard]] bool WasFrameHidden() const {
return hidden;
return !current_frame_info.show_frame;
}
private:
@ -178,19 +177,12 @@ private:
std::array<s8, 4> loop_filter_ref_deltas{};
std::array<s8, 2> loop_filter_mode_deltas{};
bool hidden = false;
s64 current_frame_number = -2; // since we buffer 2 frames
s32 grace_period = 6; // frame offsets need to stabilize
std::array<FrameContexts, 4> frame_ctxs{};
Vp9FrameContainer next_frame{};
Vp9FrameContainer next_next_frame{};
std::array<Vp9EntropyProbs, 4> frame_ctxs{};
bool swap_ref_indices{};
Vp9PictureInfo current_frame_info{};
Vp9EntropyProbs prev_frame_probs{};
s32 diff_update_probability = 252;
s32 frame_sync_code = 0x498342;
};
} // namespace Decoder

6
src/video_core/command_classes/codecs/vp9_types.h
View file

@ -296,12 +296,6 @@ struct RefPoolElement {
bool refresh{};
};
struct FrameContexts {
s64 from;
bool adapted;
Vp9EntropyProbs probs;
};
#define ASSERT_POSITION(field_name, position) \
static_assert(offsetof(Vp9EntropyProbs, field_name) == position, \
"Field " #field_name " has invalid position")