mirror of
https://github.com/hajimehoshi/ebiten.git
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67 lines
2.2 KiB
C++
Vendored
67 lines
2.2 KiB
C++
Vendored
/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <algorithm>
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#include <unistd.h>
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#include "oboe_flowgraph_FlowGraphNode_android.h"
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#include "oboe_flowgraph_SinkI24_android.h"
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#if FLOWGRAPH_ANDROID_INTERNAL
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#include <audio_utils/primitives.h>
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#endif
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using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph;
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SinkI24::SinkI24(int32_t channelCount)
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: FlowGraphSink(channelCount) {}
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int32_t SinkI24::read(void *data, int32_t numFrames) {
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uint8_t *byteData = (uint8_t *) data;
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const int32_t channelCount = input.getSamplesPerFrame();
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int32_t framesLeft = numFrames;
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while (framesLeft > 0) {
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// Run the graph and pull data through the input port.
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int32_t framesRead = pullData(framesLeft);
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if (framesRead <= 0) {
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break;
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}
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const float *floatData = input.getBuffer();
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int32_t numSamples = framesRead * channelCount;
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#if FLOWGRAPH_ANDROID_INTERNAL
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memcpy_to_p24_from_float(byteData, floatData, numSamples);
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static const int kBytesPerI24Packed = 3;
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byteData += numSamples * kBytesPerI24Packed;
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floatData += numSamples;
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#else
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const int32_t kI24PackedMax = 0x007FFFFF;
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const int32_t kI24PackedMin = 0xFF800000;
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for (int i = 0; i < numSamples; i++) {
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int32_t n = (int32_t) (*floatData++ * 0x00800000);
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n = std::min(kI24PackedMax, std::max(kI24PackedMin, n)); // clip
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// Write as a packed 24-bit integer in Little Endian format.
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*byteData++ = (uint8_t) n;
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*byteData++ = (uint8_t) (n >> 8);
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*byteData++ = (uint8_t) (n >> 16);
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}
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#endif
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framesLeft -= framesRead;
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}
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return numFrames - framesLeft;
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}
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