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interpolate: Interpolate on a frame-by-frame basis

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This commit is contained in:
MerryMage 2017-08-03 12:22:51 +01:00
parent 035716d57b
commit 933508e2a2
3 changed files with 74 additions and 88 deletions
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49
src/audio_core/hle/source.cpp
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@ -244,17 +244,27 @@ void Source::GenerateFrame() {
break;
}
const size_t size_to_copy =
std::min(state.current_buffer.size(), current_frame.size() - frame_position);
std::copy(state.current_buffer.begin(), state.current_buffer.begin() + size_to_copy,
current_frame.begin() + frame_position);
state.current_buffer.erase(state.current_buffer.begin(),
state.current_buffer.begin() + size_to_copy);
frame_position += size_to_copy;
state.next_sample_number += static_cast<u32>(size_to_copy);
switch (state.interpolation_mode) {
case InterpolationMode::None:
AudioInterp::None(state.interp_state, state.current_buffer, state.rate_multiplier,
current_frame, frame_position);
break;
case InterpolationMode::Linear:
AudioInterp::Linear(state.interp_state, state.current_buffer, state.rate_multiplier,
current_frame, frame_position);
break;
case InterpolationMode::Polyphase:
// TODO(merry): Implement polyphase interpolation
LOG_DEBUG(Audio_DSP, "Polyphase interpolation unimplemented; falling back to linear");
AudioInterp::Linear(state.interp_state, state.current_buffer, state.rate_multiplier,
current_frame, frame_position);
break;
default:
UNIMPLEMENTED();
break;
}
}
state.next_sample_number += frame_position;
state.filters.ProcessFrame(current_frame);
}
@ -305,25 +315,6 @@ bool Source::DequeueBuffer() {
return true;
}
switch (state.interpolation_mode) {
case InterpolationMode::None:
state.current_buffer =
AudioInterp::None(state.interp_state, state.current_buffer, state.rate_multiplier);
break;
case InterpolationMode::Linear:
state.current_buffer =
AudioInterp::Linear(state.interp_state, state.current_buffer, state.rate_multiplier);
break;
case InterpolationMode::Polyphase:
// TODO(merry): Implement polyphase interpolation
state.current_buffer =
AudioInterp::Linear(state.interp_state, state.current_buffer, state.rate_multiplier);
break;
default:
UNIMPLEMENTED();
break;
}
// the first playthrough starts at play_position, loops start at the beginning of the buffer
state.current_sample_number = (!buf.has_played) ? buf.play_position : 0;
state.next_sample_number = state.current_sample_number;