1 files changed, 59 insertions, 0 deletions
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.cpp
new file mode 100644
index 0000000000..e73a9c351a
--- /dev/null
+++ b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.cpp
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Player.h"
+#include "utils/logging.h"
+
+void Player::renderAudio(float *targetData, int32_t numFrames){
+
+    const AudioProperties properties = mSource->getProperties();
+
+    if (mIsPlaying){
+
+        int64_t framesToRenderFromData = numFrames;
+        int64_t totalSourceFrames = mSource->getSize() / properties.channelCount;
+        const float *data = mSource->getData();
+
+        // Check whether we're about to reach the end of the recording
+        if (!mIsLooping && mReadFrameIndex + numFrames >= totalSourceFrames){
+            framesToRenderFromData = totalSourceFrames - mReadFrameIndex;
+            mIsPlaying = false;
+        }
+
+        for (int i = 0; i < framesToRenderFromData; ++i) {
+            for (int j = 0; j < properties.channelCount; ++j) {
+                targetData[(i*properties.channelCount)+j] = data[(mReadFrameIndex*properties.channelCount)+j];
+            }
+
+            // Increment and handle wraparound
+            if (++mReadFrameIndex >= totalSourceFrames) mReadFrameIndex = 0;
+        }
+
+        if (framesToRenderFromData < numFrames){
+            // fill the rest of the buffer with silence
+            renderSilence(&targetData[framesToRenderFromData], numFrames * properties.channelCount);
+        }
+
+    } else {
+        renderSilence(targetData, numFrames * properties.channelCount);
+    }
+}
+
+void Player::renderSilence(float *start, int32_t numSamples){
+    for (int i = 0; i < numSamples; ++i) {
+        start[i] = 0;
+    }
+}