1 /*
2 * Copyright 2019 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "AudioSourceCaller.h"
18
19 using namespace oboe;
20 using namespace flowgraph;
21
onProcessFixedBlock(uint8_t * buffer,int32_t numBytes)22 int32_t AudioSourceCaller::onProcessFixedBlock(uint8_t *buffer, int32_t numBytes) {
23 AudioStreamDataCallback *callback = mStream->getDataCallback();
24 int32_t result = 0;
25 int32_t numFrames = numBytes / mStream->getBytesPerFrame();
26 if (callback != nullptr) {
27 DataCallbackResult callbackResult = callback->onAudioReady(mStream, buffer, numFrames);
28 // onAudioReady() does not return the number of bytes processed so we have to assume all.
29 result = (callbackResult == DataCallbackResult::Continue)
30 ? numBytes
31 : -1;
32 } else {
33 auto readResult = mStream->read(buffer, numFrames, mTimeoutNanos);
34 if (!readResult) return (int32_t) readResult.error();
35 result = readResult.value() * mStream->getBytesPerFrame();
36 }
37 return result;
38 }
39