diff options
| -rw-r--r-- | src/audio_core/renderer/command/resample/upsample.cpp | 97 |
1 files changed, 38 insertions, 59 deletions
diff --git a/src/audio_core/renderer/command/resample/upsample.cpp b/src/audio_core/renderer/command/resample/upsample.cpp index 6c3ff31f7..5f7db12ca 100644 --- a/src/audio_core/renderer/command/resample/upsample.cpp +++ b/src/audio_core/renderer/command/resample/upsample.cpp @@ -20,25 +20,25 @@ static void SrcProcessFrame(std::span<s32> output, std::span<const s32> input, const u32 target_sample_count, const u32 source_sample_count, UpsamplerState* state) { constexpr u32 WindowSize = 10; - constexpr std::array<Common::FixedPoint<24, 8>, WindowSize> SincWindow1{ - 51.93359375f, -18.80078125f, 9.73046875f, -5.33203125f, 2.84375f, - -1.41015625f, 0.62109375f, -0.2265625f, 0.0625f, -0.00390625f, + constexpr std::array<Common::FixedPoint<17, 15>, WindowSize> WindowedSinc1{ + 0.95376587f, -0.12872314f, 0.060028076f, -0.032470703f, 0.017669678f, + -0.009124756f, 0.004272461f, -0.001739502f, 0.000579834f, -0.000091552734f, }; - constexpr std::array<Common::FixedPoint<24, 8>, WindowSize> SincWindow2{ - 105.35546875f, -24.52734375f, 11.9609375f, -6.515625f, 3.52734375f, - -1.796875f, 0.828125f, -0.32421875f, 0.1015625f, -0.015625f, + constexpr std::array<Common::FixedPoint<17, 15>, WindowSize> WindowedSinc2{ + 0.8230896f, -0.19161987f, 0.093444824f, -0.05090332f, 0.027557373f, + -0.014038086f, 0.0064697266f, -0.002532959f, 0.00079345703f, -0.00012207031f, }; - constexpr std::array<Common::FixedPoint<24, 8>, WindowSize> SincWindow3{ - 122.08203125f, -16.47656250f, 7.68359375f, -4.15625000f, 2.26171875f, - -1.16796875f, 0.54687500f, -0.22265625f, 0.07421875f, -0.01171875f, + constexpr std::array<Common::FixedPoint<17, 15>, WindowSize> WindowedSinc3{ + 0.6298828f, -0.19274902f, 0.09725952f, -0.05319214f, 0.028625488f, + -0.014373779f, 0.006500244f, -0.0024719238f, 0.0007324219f, -0.000091552734f, }; - constexpr std::array<Common::FixedPoint<24, 8>, WindowSize> SincWindow4{ - 23.73437500f, -9.62109375f, 5.07812500f, -2.78125000f, 1.46875000f, - -0.71484375f, 0.30859375f, -0.10546875f, 0.02734375f, 0.00000000f, + constexpr std::array<Common::FixedPoint<17, 15>, WindowSize> WindowedSinc4{ + 0.4057312f, -0.1468811f, 0.07601929f, -0.041656494f, 0.022216797f, + -0.011016846f, 0.004852295f, -0.0017700195f, 0.00048828125f, -0.000030517578f, }; - constexpr std::array<Common::FixedPoint<24, 8>, WindowSize> SincWindow5{ - 80.62500000f, -24.67187500f, 12.44921875f, -6.80859375f, 3.66406250f, - -1.83984375f, 0.83203125f, -0.31640625f, 0.09375000f, -0.01171875f, + constexpr std::array<Common::FixedPoint<17, 15>, WindowSize> WindowedSinc5{ + 0.1854248f, -0.075164795f, 0.03967285f, -0.021728516f, 0.011474609f, + -0.005584717f, 0.0024108887f, -0.0008239746f, 0.00021362305f, 0.0f, }; if (!state->initialized) { @@ -91,52 +91,31 @@ static void SrcProcessFrame(std::span<s32> output, std::span<const s32> input, static_cast<u16>((state->history_output_index + 1) % UpsamplerState::HistorySize); }; - auto calculate_sample = [&state](std::span<const Common::FixedPoint<24, 8>> coeffs1, - std::span<const Common::FixedPoint<24, 8>> coeffs2) -> s32 { + auto calculate_sample = [&state](std::span<const Common::FixedPoint<17, 15>> coeffs1, + std::span<const Common::FixedPoint<17, 15>> coeffs2) -> s32 { auto output_index{state->history_output_index}; - auto start_pos{output_index - state->history_start_index + 1U}; - auto end_pos{10U}; + u64 result{0}; - if (start_pos < 10) { - end_pos = start_pos; - } - - u64 prev_contrib{0}; - u32 coeff_index{0}; - for (; coeff_index < end_pos; coeff_index++, output_index--) { - prev_contrib += static_cast<u64>(state->history[output_index].to_raw()) * - coeffs1[coeff_index].to_raw(); - } + for (u32 coeff_index = 0; coeff_index < 10; coeff_index++) { + result += static_cast<u64>(state->history[output_index].to_raw()) * + coeffs1[coeff_index].to_raw(); - auto end_index{state->history_end_index}; - for (; start_pos < 9; start_pos++, coeff_index++, end_index--) { - prev_contrib += static_cast<u64>(state->history[end_index].to_raw()) * - coeffs1[coeff_index].to_raw(); + output_index = output_index == state->history_start_index ? state->history_end_index + : output_index - 1; } output_index = static_cast<u16>((state->history_output_index + 1) % UpsamplerState::HistorySize); - start_pos = state->history_end_index - output_index + 1U; - end_pos = 10U; - if (start_pos < 10) { - end_pos = start_pos; - } - - u64 next_contrib{0}; - coeff_index = 0; - for (; coeff_index < end_pos; coeff_index++, output_index++) { - next_contrib += static_cast<u64>(state->history[output_index].to_raw()) * - coeffs2[coeff_index].to_raw(); - } + for (u32 coeff_index = 0; coeff_index < 10; coeff_index++) { + result += static_cast<u64>(state->history[output_index].to_raw()) * + coeffs2[coeff_index].to_raw(); - auto start_index{state->history_start_index}; - for (; start_pos < 9; start_pos++, start_index++, coeff_index++) { - next_contrib += static_cast<u64>(state->history[start_index].to_raw()) * - coeffs2[coeff_index].to_raw(); + output_index = output_index == state->history_end_index ? state->history_start_index + : output_index + 1; } - return static_cast<s32>(((prev_contrib >> 15) + (next_contrib >> 15)) >> 8); + return static_cast<s32>(result >> (8 + 15)); }; switch (state->ratio.to_int_floor()) { @@ -150,23 +129,23 @@ static void SrcProcessFrame(std::span<s32> output, std::span<const s32> input, break; case 1: - output[write_index] = calculate_sample(SincWindow3, SincWindow4); + output[write_index] = calculate_sample(WindowedSinc1, WindowedSinc5); break; case 2: - output[write_index] = calculate_sample(SincWindow2, SincWindow1); + output[write_index] = calculate_sample(WindowedSinc2, WindowedSinc4); break; case 3: - output[write_index] = calculate_sample(SincWindow5, SincWindow5); + output[write_index] = calculate_sample(WindowedSinc3, WindowedSinc3); break; case 4: - output[write_index] = calculate_sample(SincWindow1, SincWindow2); + output[write_index] = calculate_sample(WindowedSinc4, WindowedSinc2); break; case 5: - output[write_index] = calculate_sample(SincWindow4, SincWindow3); + output[write_index] = calculate_sample(WindowedSinc5, WindowedSinc1); break; } state->sample_index = static_cast<u8>((state->sample_index + 1) % 6); @@ -183,11 +162,11 @@ static void SrcProcessFrame(std::span<s32> output, std::span<const s32> input, break; case 1: - output[write_index] = calculate_sample(SincWindow2, SincWindow1); + output[write_index] = calculate_sample(WindowedSinc2, WindowedSinc4); break; case 2: - output[write_index] = calculate_sample(SincWindow1, SincWindow2); + output[write_index] = calculate_sample(WindowedSinc4, WindowedSinc2); break; } state->sample_index = static_cast<u8>((state->sample_index + 1) % 3); @@ -204,12 +183,12 @@ static void SrcProcessFrame(std::span<s32> output, std::span<const s32> input, break; case 1: - output[write_index] = calculate_sample(SincWindow1, SincWindow2); + output[write_index] = calculate_sample(WindowedSinc4, WindowedSinc2); break; case 2: increment(); - output[write_index] = calculate_sample(SincWindow2, SincWindow1); + output[write_index] = calculate_sample(WindowedSinc2, WindowedSinc4); break; } state->sample_index = static_cast<u8>((state->sample_index + 1) % 3); |