diff options
Diffstat (limited to 'indra/llaudio/llstreamingaudio_fmodex.cpp')
| -rw-r--r-- | indra/llaudio/llstreamingaudio_fmodex.cpp | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/indra/llaudio/llstreamingaudio_fmodex.cpp b/indra/llaudio/llstreamingaudio_fmodex.cpp new file mode 100644 index 0000000000..4a74267650 --- /dev/null +++ b/indra/llaudio/llstreamingaudio_fmodex.cpp @@ -0,0 +1,373 @@ +/** + * @file streamingaudio_fmodex.cpp + * @brief LLStreamingAudio_FMODEX implementation + * + * $LicenseInfo:firstyear=2002&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2010, Linden Research, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License only. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * $/LicenseInfo$ + */ + +#include "linden_common.h" + +#include "llmath.h" + +#include "fmod.hpp" +#include "fmod_errors.h" + +#include "llstreamingaudio_fmodex.h" + + +class LLAudioStreamManagerFMODEX +{ +public: + LLAudioStreamManagerFMODEX(FMOD::System *system, const std::string& url); + FMOD::Channel* startStream(); + bool stopStream(); // Returns true if the stream was successfully stopped. + bool ready(); + + const std::string& getURL() { return mInternetStreamURL; } + + FMOD_OPENSTATE getOpenState(unsigned int* percentbuffered=NULL, bool* starving=NULL, bool* diskbusy=NULL); +protected: + FMOD::System* mSystem; + FMOD::Channel* mStreamChannel; + FMOD::Sound* mInternetStream; + bool mReady; + + std::string mInternetStreamURL; +}; + + + +//--------------------------------------------------------------------------- +// Internet Streaming +//--------------------------------------------------------------------------- +LLStreamingAudio_FMODEX::LLStreamingAudio_FMODEX(FMOD::System *system) : + mSystem(system), + mCurrentInternetStreamp(NULL), + mFMODInternetStreamChannelp(NULL), + mGain(1.0f) +{ + // Number of milliseconds of audio to buffer for the audio card. + // Must be larger than the usual Second Life frame stutter time. + const U32 buffer_seconds = 10; //sec + const U32 estimated_bitrate = 128; //kbit/sec + mSystem->setStreamBufferSize(estimated_bitrate * buffer_seconds * 128/*bytes/kbit*/, FMOD_TIMEUNIT_RAWBYTES); + + // Here's where we set the size of the network buffer and some buffering + // parameters. In this case we want a network buffer of 16k, we want it + // to prebuffer 40% of that when we first connect, and we want it + // to rebuffer 80% of that whenever we encounter a buffer underrun. + + // Leave the net buffer properties at the default. + //FSOUND_Stream_Net_SetBufferProperties(20000, 40, 80); +} + + +LLStreamingAudio_FMODEX::~LLStreamingAudio_FMODEX() +{ + // nothing interesting/safe to do. +} + + +void LLStreamingAudio_FMODEX::start(const std::string& url) +{ + //if (!mInited) + //{ + // llwarns << "startInternetStream before audio initialized" << llendl; + // return; + //} + + // "stop" stream but don't clear url, etc. in case url == mInternetStreamURL + stop(); + + if (!url.empty()) + { + llinfos << "Starting internet stream: " << url << llendl; + mCurrentInternetStreamp = new LLAudioStreamManagerFMODEX(mSystem,url); + mURL = url; + } + else + { + llinfos << "Set internet stream to null" << llendl; + mURL.clear(); + } +} + + +void LLStreamingAudio_FMODEX::update() +{ + // Kill dead internet streams, if possible + std::list<LLAudioStreamManagerFMODEX *>::iterator iter; + for (iter = mDeadStreams.begin(); iter != mDeadStreams.end();) + { + LLAudioStreamManagerFMODEX *streamp = *iter; + if (streamp->stopStream()) + { + llinfos << "Closed dead stream" << llendl; + delete streamp; + mDeadStreams.erase(iter++); + } + else + { + iter++; + } + } + + // Don't do anything if there are no streams playing + if (!mCurrentInternetStreamp) + { + return; + } + + unsigned int progress; + bool starving; + bool diskbusy; + FMOD_OPENSTATE open_state = mCurrentInternetStreamp->getOpenState(&progress, &starving, &diskbusy); + + if (open_state == FMOD_OPENSTATE_READY) + { + // Stream is live + + // start the stream if it's ready + if (!mFMODInternetStreamChannelp && + (mFMODInternetStreamChannelp = mCurrentInternetStreamp->startStream())) + { + // Reset volume to previously set volume + setGain(getGain()); + mFMODInternetStreamChannelp->setPaused(false); + mLastStarved.stop(); + } + } + else if(open_state == FMOD_OPENSTATE_ERROR) + { + stop(); + return; + } + + if(mFMODInternetStreamChannelp) + { + FMOD::Sound *sound = NULL; + + if(mFMODInternetStreamChannelp->getCurrentSound(&sound) == FMOD_OK && sound) + { + if(starving) + { + if(!mLastStarved.getStarted()) + { + llinfos << "Stream starvation detected! Muting stream audio until it clears." << llendl; + llinfos << " (diskbusy="<<diskbusy<<")" << llendl; + llinfos << " (progress="<<progress<<")" << llendl; + mFMODInternetStreamChannelp->setMute(true); + } + mLastStarved.start(); + } + else if(mLastStarved.getStarted() && mLastStarved.getElapsedTimeF32() > 1.f) + { + mLastStarved.stop(); + mFMODInternetStreamChannelp->setMute(false); + } + } + } +} + +void LLStreamingAudio_FMODEX::stop() +{ + mLastStarved.stop(); + + if (mFMODInternetStreamChannelp) + { + mFMODInternetStreamChannelp->setPaused(true); + mFMODInternetStreamChannelp->setPriority(0); + mFMODInternetStreamChannelp = NULL; + } + + if (mCurrentInternetStreamp) + { + llinfos << "Stopping internet stream: " << mCurrentInternetStreamp->getURL() << llendl; + if (mCurrentInternetStreamp->stopStream()) + { + delete mCurrentInternetStreamp; + } + else + { + llwarns << "Pushing stream to dead list: " << mCurrentInternetStreamp->getURL() << llendl; + mDeadStreams.push_back(mCurrentInternetStreamp); + } + mCurrentInternetStreamp = NULL; + //mURL.clear(); + } +} + +void LLStreamingAudio_FMODEX::pause(int pauseopt) +{ + if (pauseopt < 0) + { + pauseopt = mCurrentInternetStreamp ? 1 : 0; + } + + if (pauseopt) + { + if (mCurrentInternetStreamp) + { + stop(); + } + } + else + { + start(getURL()); + } +} + + +// A stream is "playing" if it has been requested to start. That +// doesn't necessarily mean audio is coming out of the speakers. +int LLStreamingAudio_FMODEX::isPlaying() +{ + if (mCurrentInternetStreamp) + { + return 1; // Active and playing + } + else if (!mURL.empty()) + { + return 2; // "Paused" + } + else + { + return 0; + } +} + + +F32 LLStreamingAudio_FMODEX::getGain() +{ + return mGain; +} + + +std::string LLStreamingAudio_FMODEX::getURL() +{ + return mURL; +} + + +void LLStreamingAudio_FMODEX::setGain(F32 vol) +{ + mGain = vol; + + if (mFMODInternetStreamChannelp) + { + vol = llclamp(vol * vol, 0.f, 1.f); //should vol be squared here? + + mFMODInternetStreamChannelp->setVolume(vol); + } +} + +/////////////////////////////////////////////////////// +// manager of possibly-multiple internet audio streams + +LLAudioStreamManagerFMODEX::LLAudioStreamManagerFMODEX(FMOD::System *system, const std::string& url) : + mSystem(system), + mStreamChannel(NULL), + mInternetStream(NULL), + mReady(false) +{ + mInternetStreamURL = url; + + FMOD_RESULT result = mSystem->createStream(url.c_str(), FMOD_2D | FMOD_NONBLOCKING | FMOD_MPEGSEARCH | FMOD_IGNORETAGS, 0, &mInternetStream); + + if (result!= FMOD_OK) + { + llwarns << "Couldn't open fmod stream, error " + << FMOD_ErrorString(result) + << llendl; + mReady = false; + return; + } + + mReady = true; +} + +FMOD::Channel *LLAudioStreamManagerFMODEX::startStream() +{ + // We need a live and opened stream before we try and play it. + if (!mInternetStream || getOpenState() != FMOD_OPENSTATE_READY) + { + llwarns << "No internet stream to start playing!" << llendl; + return NULL; + } + + if(mStreamChannel) + return mStreamChannel; //Already have a channel for this stream. + + mSystem->playSound(FMOD_CHANNEL_FREE, mInternetStream, true, &mStreamChannel); + return mStreamChannel; +} + +bool LLAudioStreamManagerFMODEX::stopStream() +{ + if (mInternetStream) + { + + + bool close = true; + switch (getOpenState()) + { + case FMOD_OPENSTATE_CONNECTING: + close = false; + break; + default: + close = true; + } + + if (close) + { + mInternetStream->release(); + mStreamChannel = NULL; + mInternetStream = NULL; + return true; + } + else + { + return false; + } + } + else + { + return true; + } +} + +FMOD_OPENSTATE LLAudioStreamManagerFMODEX::getOpenState(unsigned int* percentbuffered, bool* starving, bool* diskbusy) +{ + FMOD_OPENSTATE state; + mInternetStream->getOpenState(&state, percentbuffered, starving, diskbusy); + return state; +} + +void LLStreamingAudio_FMODEX::setBufferSizes(U32 streambuffertime, U32 decodebuffertime) +{ + mSystem->setStreamBufferSize(streambuffertime/1000*128*128, FMOD_TIMEUNIT_RAWBYTES); + FMOD_ADVANCEDSETTINGS settings; + memset(&settings,0,sizeof(settings)); + settings.cbsize=sizeof(settings); + settings.defaultDecodeBufferSize = decodebuffertime;//ms + mSystem->setAdvancedSettings(&settings); +} |