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axmol/cocos/audio/apple/AudioCache.mm

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/****************************************************************************
Copyright (c) 2014-2016 Chukong Technologies Inc.
http://www.cocos2d-x.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#define LOG_TAG "AudioCache"
#include "platform/CCPlatformConfig.h"
#if CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_MAC
#include "audio/apple/AudioCache.h"
#import <Foundation/Foundation.h>
#import <OpenAL/alc.h>
#include <thread>
#include "base/CCDirector.h"
#include "base/CCScheduler.h"
#include "audio/apple/AudioDecoder.h"
#define VERY_VERY_VERBOSE_LOGGING
#ifdef VERY_VERY_VERBOSE_LOGGING
#define ALOGVV ALOGV
#else
#define ALOGVV(...) do{} while(false)
#endif
namespace {
unsigned int __idIndex = 0;
}
#define INVALID_AL_BUFFER_ID 0xFFFFFFFF
#define PCMDATA_CACHEMAXSIZE 1048576
typedef ALvoid AL_APIENTRY (*alBufferDataStaticProcPtr) (const ALint bid, ALenum format, ALvoid* data, ALsizei size, ALsizei freq);
static ALvoid alBufferDataStaticProc(const ALint bid, ALenum format, ALvoid* data, ALsizei size, ALsizei freq)
{
static alBufferDataStaticProcPtr proc = nullptr;
if (proc == nullptr) {
proc = (alBufferDataStaticProcPtr) alcGetProcAddress(nullptr, (const ALCchar*) "alBufferDataStatic");
}
if (proc){
proc(bid, format, data, size, freq);
}
return;
}
using namespace cocos2d;
using namespace cocos2d::experimental;
AudioCache::AudioCache()
: _totalFrames(0)
, _framesRead(0)
, _format(-1)
, _duration(0.0f)
, _alBufferId(INVALID_AL_BUFFER_ID)
, _pcmData(nullptr)
, _queBufferFrames(0)
, _state(State::INITIAL)
, _isDestroyed(std::make_shared<bool>(false))
, _id(++__idIndex)
, _isLoadingFinished(false)
, _isSkipReadDataTask(false)
{
ALOGVV("AudioCache() %p, id=%u", this, _id);
for (int i = 0; i < QUEUEBUFFER_NUM; ++i)
{
_queBuffers[i] = nullptr;
_queBufferSize[i] = 0;
}
}
AudioCache::~AudioCache()
{
ALOGVV("~AudioCache() %p, id=%u, begin", this, _id);
*_isDestroyed = true;
while (!_isLoadingFinished)
{
if (_isSkipReadDataTask)
{
ALOGV("id=%u, Skip read data task, don't continue to wait!", _id);
break;
}
ALOGVV("id=%u, waiting readData thread to finish ...", _id);
std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
//wait for the 'readDataTask' task to exit
_readDataTaskMutex.lock();
_readDataTaskMutex.unlock();
if (_pcmData)
{
if (_state == State::READY)
{
if (_alBufferId != INVALID_AL_BUFFER_ID && alIsBuffer(_alBufferId))
{
ALOGV("~AudioCache(id=%u), delete buffer: %u", _id, _alBufferId);
alDeleteBuffers(1, &_alBufferId);
_alBufferId = INVALID_AL_BUFFER_ID;
}
}
else
{
ALOGW("AudioCache (%p), id=%u, buffer isn't ready, state=%d", this, _id, _state);
}
free(_pcmData);
}
if (_queBufferFrames > 0)
{
for (int index = 0; index < QUEUEBUFFER_NUM; ++index)
{
free(_queBuffers[index]);
}
}
ALOGVV("~AudioCache() %p, id=%u, end", this, _id);
}
void AudioCache::readDataTask(unsigned int selfId)
{
//Note: It's in sub thread
ALOGVV("readDataTask, cache id=%u", selfId);
_readDataTaskMutex.lock();
_state = State::LOADING;
AudioDecoder decoder;
do
{
if (!decoder.open(_fileFullPath.c_str()))
break;
const uint32_t originalTotalFrames = decoder.getTotalFrames();
const uint32_t bytesPerFrame = decoder.getBytesPerFrame();
const uint32_t sampleRate = decoder.getSampleRate();
const uint32_t channelCount = decoder.getChannelCount();
uint32_t totalFrames = originalTotalFrames;
uint32_t dataSize = totalFrames * bytesPerFrame;
uint32_t remainingFrames = totalFrames;
uint32_t adjustFrames = 0;
_format = channelCount > 1 ? AL_FORMAT_STEREO16 : AL_FORMAT_MONO16;
_sampleRate = (ALsizei)sampleRate;
_duration = 1.0f * totalFrames / sampleRate;
_totalFrames = totalFrames;
if (dataSize <= PCMDATA_CACHEMAXSIZE)
{
uint32_t framesRead = 0;
const uint32_t framesToReadOnce = std::min(totalFrames, static_cast<uint32_t>(sampleRate * QUEUEBUFFER_TIME_STEP * QUEUEBUFFER_NUM));
BREAK_IF_ERR_LOG(!decoder.seek(totalFrames), "AudioDecoder::seek(%u) error", totalFrames);
char* tmpBuf = (char*)malloc(framesToReadOnce * bytesPerFrame);
std::vector<char> adjustFrameBuf;
adjustFrameBuf.reserve(framesToReadOnce * bytesPerFrame);
// Adjust total frames by setting position to the end of frames and try to read more data.
// This is a workaround for https://github.com/cocos2d/cocos2d-x/issues/16938
do
{
framesRead = decoder.read(framesToReadOnce, tmpBuf);
if (framesRead > 0)
{
adjustFrames += framesRead;
adjustFrameBuf.insert(adjustFrameBuf.end(), tmpBuf, tmpBuf + framesRead * bytesPerFrame);
}
} while (framesRead > 0);
if (adjustFrames > 0)
{
ALOGV("Orignal total frames: %u, adjust frames: %u, current total frames: %u", totalFrames, adjustFrames, totalFrames + adjustFrames);
totalFrames += adjustFrames;
_totalFrames = remainingFrames = totalFrames;
}
// Reset dataSize
dataSize = totalFrames * bytesPerFrame;
free(tmpBuf);
// Reset to frame 0
BREAK_IF_ERR_LOG(!decoder.seek(0), "AudioDecoder::seek(0) failed!");
_pcmData = (char*)malloc(dataSize);
memset(_pcmData, 0x00, dataSize);
if (adjustFrames > 0)
{
memcpy(_pcmData + (dataSize - adjustFrameBuf.size()), adjustFrameBuf.data(), adjustFrameBuf.size());
}
alGenBuffers(1, &_alBufferId);
auto alError = alGetError();
if (alError != AL_NO_ERROR) {
ALOGE("%s: attaching audio to buffer fail: %x", __PRETTY_FUNCTION__, alError);
break;
}
if (*_isDestroyed)
break;
alBufferDataStaticProc(_alBufferId, _format, _pcmData, (ALsizei)dataSize, (ALsizei)sampleRate);
framesRead = decoder.readFixedFrames(std::min(framesToReadOnce, remainingFrames), _pcmData + _framesRead * bytesPerFrame);
_framesRead += framesRead;
remainingFrames -= framesRead;
if (*_isDestroyed)
break;
_state = State::READY;
invokingPlayCallbacks();
uint32_t frames = 0;
while (!*_isDestroyed && _framesRead < originalTotalFrames)
{
frames = std::min(framesToReadOnce, remainingFrames);
if (_framesRead + frames > originalTotalFrames)
{
frames = originalTotalFrames - _framesRead;
}
framesRead = decoder.read(frames, _pcmData + _framesRead * bytesPerFrame);
if (framesRead == 0)
break;
_framesRead += framesRead;
remainingFrames -= framesRead;
}
if (_framesRead < originalTotalFrames)
{
memset(_pcmData + _framesRead * bytesPerFrame, 0x00, (totalFrames - _framesRead) * bytesPerFrame);
}
ALOGV("pcm buffer was loaded successfully, total frames: %u, total read frames: %u, adjust frames: %u, remainingFrames: %u", totalFrames, _framesRead, adjustFrames, remainingFrames);
_framesRead += adjustFrames;
}
else
{
_queBufferFrames = sampleRate * QUEUEBUFFER_TIME_STEP;
BREAK_IF_ERR_LOG(_queBufferFrames == 0, "_queBufferFrames == 0");
const uint32_t queBufferBytes = _queBufferFrames * bytesPerFrame;
for (int index = 0; index < QUEUEBUFFER_NUM; ++index)
{
_queBuffers[index] = (char*)malloc(queBufferBytes);
_queBufferSize[index] = queBufferBytes;
decoder.readFixedFrames(_queBufferFrames, _queBuffers[index]);
}
_state = State::READY;
}
} while (false);
decoder.close();
//FIXME: Why to invoke play callback first? Should it be after 'load' callback?
invokingPlayCallbacks();
invokingLoadCallbacks();
_isLoadingFinished = true;
if (_state != State::READY)
{
_state = State::FAILED;
if (_alBufferId != INVALID_AL_BUFFER_ID && alIsBuffer(_alBufferId))
{
ALOGV("readDataTask failed, delete buffer: %u", _alBufferId);
alDeleteBuffers(1, &_alBufferId);
_alBufferId = INVALID_AL_BUFFER_ID;
}
}
_readDataTaskMutex.unlock();
}
void AudioCache::addPlayCallback(const std::function<void()>& callback)
{
std::lock_guard<std::mutex> lk(_playCallbackMutex);
switch (_state)
{
case State::INITIAL:
case State::LOADING:
_playCallbacks.push_back(callback);
break;
case State::READY:
// If state is failure, we still need to invoke the callback
// since the callback will set the 'AudioPlayer::_removeByAudioEngine' flag to true.
case State::FAILED:
callback();
break;
default:
ALOGE("Invalid state: %d", _state);
break;
}
}
void AudioCache::invokingPlayCallbacks()
{
std::lock_guard<std::mutex> lk(_playCallbackMutex);
for (auto&& cb : _playCallbacks)
{
cb();
}
_playCallbacks.clear();
}
void AudioCache::addLoadCallback(const std::function<void(bool)>& callback)
{
switch (_state)
{
case State::INITIAL:
case State::LOADING:
_loadCallbacks.push_back(callback);
break;
case State::READY:
callback(true);
break;
case State::FAILED:
callback(false);
break;
default:
ALOGE("Invalid state: %d", _state);
break;
}
}
void AudioCache::invokingLoadCallbacks()
{
if (*_isDestroyed)
{
ALOGV("AudioCache (%p) was destroyed, don't invoke preload callback ...", this);
return;
}
auto isDestroyed = _isDestroyed;
auto scheduler = Director::getInstance()->getScheduler();
scheduler->performFunctionInCocosThread([&, isDestroyed](){
if (*isDestroyed)
{
ALOGV("invokingLoadCallbacks perform in cocos thread, AudioCache (%p) was destroyed!", this);
return;
}
for (auto&& cb : _loadCallbacks)
{
cb(_state == State::READY);
}
_loadCallbacks.clear();
});
}
#endif
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