1010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten/* 2010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * Copyright (C) 2012 The Android Open Source Project 3010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * 4010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * Licensed under the Apache License, Version 2.0 (the "License"); 5010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * you may not use this file except in compliance with the License. 6010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * You may obtain a copy of the License at 7010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * 8010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * http://www.apache.org/licenses/LICENSE-2.0 9010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * 10010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * Unless required by applicable law or agreed to in writing, software 11010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * distributed under the License is distributed on an "AS IS" BASIS, 12010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * See the License for the specific language governing permissions and 14010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * limitations under the License. 15010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten */ 16010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 17010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#define LOG_TAG "Pipe" 18010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten//#define LOG_NDEBUG 0 19010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 20010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#include <cutils/atomic.h> 21010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#include <cutils/compiler.h> 22010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#include <utils/Log.h> 232dd4bdd715f586d4d30cf90cc6fc2bbfbce60fe0Glenn Kasten#include <media/nbaio/Pipe.h> 2453dbe77b9f50cdd0de88b9d25dd643e90c8ba68bGlenn Kasten#include <audio_utils/roundup.h> 25010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 26010662326b9c43c703725f933e95e0897f8a6bddGlenn Kastennamespace android { 27010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 28c26d923712a59e669d18191d93fbe3696789d592Glenn KastenPipe::Pipe(size_t maxFrames, const NBAIO_Format& format, void *buffer) : 29010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten NBAIO_Sink(format), 30ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten // TODO fifo now supports non-power-of-2 buffer sizes, so could remove the roundup 31010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten mMaxFrames(roundup(maxFrames)), 32c26d923712a59e669d18191d93fbe3696789d592Glenn Kasten mBuffer(buffer == NULL ? malloc(mMaxFrames * Format_frameSize(format)) : buffer), 33ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten mFifo(mMaxFrames, Format_frameSize(format), mBuffer, false /*throttlesWriter*/), 34ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten mFifoWriter(mFifo), 35c26d923712a59e669d18191d93fbe3696789d592Glenn Kasten mReaders(0), 36c26d923712a59e669d18191d93fbe3696789d592Glenn Kasten mFreeBufferInDestructor(buffer == NULL) 37010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten{ 38010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten} 39010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 40010662326b9c43c703725f933e95e0897f8a6bddGlenn KastenPipe::~Pipe() 41010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten{ 42010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten ALOG_ASSERT(android_atomic_acquire_load(&mReaders) == 0); 43c26d923712a59e669d18191d93fbe3696789d592Glenn Kasten if (mFreeBufferInDestructor) { 44c26d923712a59e669d18191d93fbe3696789d592Glenn Kasten free(mBuffer); 45c26d923712a59e669d18191d93fbe3696789d592Glenn Kasten } 46010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten} 47010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 48010662326b9c43c703725f933e95e0897f8a6bddGlenn Kastenssize_t Pipe::write(const void *buffer, size_t count) 49010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten{ 50010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten // count == 0 is unlikely and not worth checking for 51010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten if (CC_UNLIKELY(!mNegotiated)) { 52010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten return NEGOTIATE; 53010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten } 54ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten ssize_t actual = mFifoWriter.write(buffer, count); 55ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten ALOG_ASSERT(actual <= count); 56ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten if (actual <= 0) { 57ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten return actual; 58010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten } 59ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten mFramesWritten += (size_t) actual; 60ed99c2b5a99a8bfc163a6ffa0b767c82032b09b5Glenn Kasten return actual; 61010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten} 62010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 63010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten} // namespace android 64