diff options
Diffstat (limited to 'src/audio_core/interpolate.h')
-rw-r--r-- | src/audio_core/interpolate.h | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/src/audio_core/interpolate.h b/src/audio_core/interpolate.h index 19a7b66cb..8dff6111a 100644 --- a/src/audio_core/interpolate.h +++ b/src/audio_core/interpolate.h @@ -5,40 +5,45 @@ #pragma once #include <array> -#include <vector> +#include <deque> +#include "audio_core/hle/common.h" #include "common/common_types.h" namespace AudioInterp { /// A variable length buffer of signed PCM16 stereo samples. -using StereoBuffer16 = std::vector<std::array<s16, 2>>; +using StereoBuffer16 = std::deque<std::array<s16, 2>>; struct State { - // Two historical samples. + /// Two historical samples. std::array<s16, 2> xn1 = {}; ///< x[n-1] std::array<s16, 2> xn2 = {}; ///< x[n-2] + /// Current fractional position. + u64 fposition = 0; }; /** * No interpolation. This is equivalent to a zero-order hold. There is a two-sample predelay. * @param state Interpolation state. * @param input Input buffer. - * @param rate_multiplier Stretch factor. Must be a positive non-zero value. - * rate_multiplier > 1.0 performs decimation and rate_multipler < 1.0 - * performs upsampling. - * @return The resampled audio buffer. + * @param rate Stretch factor. Must be a positive non-zero value. + * rate > 1.0 performs decimation and rate < 1.0 performs upsampling. + * @param output The resampled audio buffer. + * @param outputi The index of output to start writing to. */ -StereoBuffer16 None(State& state, const StereoBuffer16& input, float rate_multiplier); +void None(State& state, StereoBuffer16& input, float rate, DSP::HLE::StereoFrame16& output, + size_t& outputi); /** * Linear interpolation. This is equivalent to a first-order hold. There is a two-sample predelay. * @param state Interpolation state. * @param input Input buffer. - * @param rate_multiplier Stretch factor. Must be a positive non-zero value. - * rate_multiplier > 1.0 performs decimation and rate_multipler < 1.0 - * performs upsampling. - * @return The resampled audio buffer. + * @param rate Stretch factor. Must be a positive non-zero value. + * rate > 1.0 performs decimation and rate < 1.0 performs upsampling. + * @param output The resampled audio buffer. + * @param outputi The index of output to start writing to. */ -StereoBuffer16 Linear(State& state, const StereoBuffer16& input, float rate_multiplier); +void Linear(State& state, StereoBuffer16& input, float rate, DSP::HLE::StereoFrame16& output, + size_t& outputi); } // namespace AudioInterp |