| #include <private/dvr/frame_history.h> |
| |
| #include <errno.h> |
| #include <log/log.h> |
| #include <sync/sync.h> |
| |
| #include <pdx/file_handle.h> |
| #include <private/dvr/clock_ns.h> |
| #include <private/dvr/sync_util.h> |
| |
| using android::pdx::LocalHandle; |
| |
| constexpr int kNumFramesToUseForSchedulePrediction = 10; |
| constexpr int kDefaultVsyncIntervalPrediction = 1; |
| constexpr int kMaxVsyncIntervalPrediction = 4; |
| constexpr int kDefaultPendingFrameBufferSize = 10; |
| |
| namespace android { |
| namespace dvr { |
| |
| FrameHistory::PendingFrame::PendingFrame() |
| : start_ns(0), scheduled_vsync(0), scheduled_finish_ns(0) {} |
| |
| FrameHistory::PendingFrame::PendingFrame(int64_t start_ns, |
| uint32_t scheduled_vsync, |
| int64_t scheduled_finish_ns, |
| LocalHandle&& fence) |
| : start_ns(start_ns), scheduled_vsync(scheduled_vsync), |
| scheduled_finish_ns(scheduled_finish_ns), fence(std::move(fence)) {} |
| |
| FrameHistory::FrameHistory() : FrameHistory(kDefaultPendingFrameBufferSize) {} |
| |
| FrameHistory::FrameHistory(int pending_frame_buffer_size) |
| : pending_frames_(pending_frame_buffer_size), |
| finished_frames_(pending_frame_buffer_size), |
| frame_duration_history_(kNumFramesToUseForSchedulePrediction) {} |
| |
| void FrameHistory::Reset(int pending_frame_buffer_size) { |
| pending_frames_.Reset(pending_frame_buffer_size); |
| finished_frames_.Reset(pending_frame_buffer_size); |
| frame_duration_history_.Clear(); |
| } |
| |
| void FrameHistory::OnFrameStart(uint32_t scheduled_vsync, |
| int64_t scheduled_finish_ns) { |
| if (!pending_frames_.IsEmpty() && !pending_frames_.Back().fence) { |
| // If we don't have a fence set for the previous frame it's because |
| // OnFrameStart() was called twice in a row with no OnFrameSubmit() call. In |
| // that case throw out the pending frame data for the last frame. |
| pending_frames_.PopBack(); |
| } |
| |
| if (pending_frames_.IsFull()) { |
| ALOGW("Pending frames buffer is full. Discarding pending frame data."); |
| } |
| |
| pending_frames_.Append(PendingFrame(GetSystemClockNs(), scheduled_vsync, |
| scheduled_finish_ns, LocalHandle())); |
| } |
| |
| void FrameHistory::OnFrameSubmit(LocalHandle&& fence) { |
| // Add the fence to the previous frame data in pending_frames so we can |
| // track when it finishes. |
| if (!pending_frames_.IsEmpty() && !pending_frames_.Back().fence) { |
| if (fence && pending_frames_.Back().scheduled_vsync != UINT32_MAX) |
| pending_frames_.Back().fence = std::move(fence); |
| else |
| pending_frames_.PopBack(); |
| } |
| } |
| |
| void FrameHistory::CheckForFinishedFrames() { |
| if (pending_frames_.IsEmpty()) |
| return; |
| |
| android::dvr::FenceInfoBuffer fence_info_buffer; |
| while (!pending_frames_.IsEmpty()) { |
| const auto& pending_frame = pending_frames_.Front(); |
| if (!pending_frame.fence) { |
| // The frame hasn't been submitted yet, so there's nothing more to do |
| break; |
| } |
| |
| int64_t fence_signaled_time = -1; |
| int fence = pending_frame.fence.Get(); |
| int sync_result = sync_wait(fence, 0); |
| if (sync_result == 0) { |
| int fence_signaled_result = |
| GetFenceSignaledTimestamp(fence, &fence_info_buffer, |
| &fence_signaled_time); |
| if (fence_signaled_result < 0) { |
| ALOGE("Failed getting signaled timestamp from fence"); |
| } else { |
| // The frame is finished. Record the duration and move the frame data |
| // from pending_frames_ to finished_frames_. |
| DvrFrameScheduleResult schedule_result = {}; |
| schedule_result.vsync_count = pending_frame.scheduled_vsync; |
| schedule_result.scheduled_frame_finish_ns = |
| pending_frame.scheduled_finish_ns; |
| schedule_result.frame_finish_offset_ns = |
| fence_signaled_time - pending_frame.scheduled_finish_ns; |
| finished_frames_.Append(schedule_result); |
| frame_duration_history_.Append( |
| fence_signaled_time - pending_frame.start_ns); |
| } |
| pending_frames_.PopFront(); |
| } else { |
| if (errno != ETIME) { |
| ALOGE("sync_wait on frame fence failed. fence=%d errno=%d (%s).", |
| fence, errno, strerror(errno)); |
| } |
| break; |
| } |
| } |
| } |
| |
| int FrameHistory::PredictNextFrameVsyncInterval(int64_t vsync_period_ns) const { |
| if (frame_duration_history_.IsEmpty()) |
| return kDefaultVsyncIntervalPrediction; |
| |
| double total = 0; |
| for (size_t i = 0; i < frame_duration_history_.GetSize(); ++i) |
| total += frame_duration_history_.Get(i); |
| double avg_duration = total / frame_duration_history_.GetSize(); |
| |
| return std::min(kMaxVsyncIntervalPrediction, |
| static_cast<int>(avg_duration / vsync_period_ns) + 1); |
| } |
| |
| int FrameHistory::GetPreviousFrameResults(DvrFrameScheduleResult* results, |
| int in_result_count) { |
| int out_result_count = |
| std::min(in_result_count, static_cast<int>(finished_frames_.GetSize())); |
| for (int i = 0; i < out_result_count; ++i) { |
| results[i] = finished_frames_.Get(0); |
| finished_frames_.PopFront(); |
| } |
| return out_result_count; |
| } |
| |
| uint32_t FrameHistory::GetCurrentFrameVsync() const { |
| return pending_frames_.IsEmpty() ? |
| UINT32_MAX : pending_frames_.Back().scheduled_vsync; |
| } |
| |
| } // namespace dvr |
| } // namespace android |