llstreamingaudio_fmod.cpp
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- /**
- * @file streamingaudio_fmod.cpp
- * @brief LLStreamingAudio_FMOD implementation
- *
- * $LicenseInfo:firstyear=2009&license=viewergpl$
- *
- * Copyright (c) 2009-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #include "linden_common.h"
- #include "llmath.h"
- #include "fmod.h"
- #include "fmod_errors.h"
- #include "llstreamingaudio_fmod.h"
- class LLAudioStreamManagerFMOD
- {
- public:
- LLAudioStreamManagerFMOD(const std::string& url);
- int startStream();
- bool stopStream(); // Returns true if the stream was successfully stopped.
- bool ready();
- const std::string& getURL() { return mInternetStreamURL; }
- int getOpenState();
- protected:
- FSOUND_STREAM* mInternetStream;
- bool mReady;
- std::string mInternetStreamURL;
- };
- //---------------------------------------------------------------------------
- // Internet Streaming
- //---------------------------------------------------------------------------
- LLStreamingAudio_FMOD::LLStreamingAudio_FMOD() :
- mCurrentInternetStreamp(NULL),
- mFMODInternetStreamChannel(-1),
- 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.
- FSOUND_Stream_SetBufferSize(200);
- // 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_FMOD::~LLStreamingAudio_FMOD()
- {
- // nothing interesting/safe to do.
- }
- void LLStreamingAudio_FMOD::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 LLAudioStreamManagerFMOD(url);
- mURL = url;
- }
- else
- {
- llinfos << "Set internet stream to null" << llendl;
- mURL.clear();
- }
- }
- void LLStreamingAudio_FMOD::update()
- {
- // Kill dead internet streams, if possible
- std::list<LLAudioStreamManagerFMOD *>::iterator iter;
- for (iter = mDeadStreams.begin(); iter != mDeadStreams.end();)
- {
- LLAudioStreamManagerFMOD *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;
- }
- int open_state = mCurrentInternetStreamp->getOpenState();
- if (!open_state)
- {
- // Stream is live
- // start the stream if it's ready
- if (mFMODInternetStreamChannel < 0)
- {
- mFMODInternetStreamChannel = mCurrentInternetStreamp->startStream();
- if (mFMODInternetStreamChannel != -1)
- {
- // Reset volume to previously set volume
- setGain(getGain());
- FSOUND_SetPaused(mFMODInternetStreamChannel, false);
- }
- }
- }
- switch(open_state)
- {
- default:
- case 0:
- // success
- break;
- case -1:
- // stream handle is invalid
- llwarns << "InternetStream - invalid handle" << llendl;
- stop();
- return;
- case -2:
- // opening
- break;
- case -3:
- // failed to open, file not found, perhaps
- llwarns << "InternetStream - failed to open" << llendl;
- stop();
- return;
- case -4:
- // connecting
- break;
- case -5:
- // buffering
- break;
- }
- }
- void LLStreamingAudio_FMOD::stop()
- {
- if (mFMODInternetStreamChannel != -1)
- {
- FSOUND_SetPaused(mFMODInternetStreamChannel, true);
- FSOUND_SetPriority(mFMODInternetStreamChannel, 0);
- mFMODInternetStreamChannel = -1;
- }
- 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_FMOD::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_FMOD::isPlaying()
- {
- if (mCurrentInternetStreamp)
- {
- return 1; // Active and playing
- }
- else if (!mURL.empty())
- {
- return 2; // "Paused"
- }
- else
- {
- return 0;
- }
- }
- F32 LLStreamingAudio_FMOD::getGain()
- {
- return mGain;
- }
- std::string LLStreamingAudio_FMOD::getURL()
- {
- return mURL;
- }
- void LLStreamingAudio_FMOD::setGain(F32 vol)
- {
- mGain = vol;
- if (mFMODInternetStreamChannel != -1)
- {
- vol = llclamp(vol, 0.f, 1.f);
- int vol_int = llround(vol * 255.f);
- FSOUND_SetVolumeAbsolute(mFMODInternetStreamChannel, vol_int);
- }
- }
- ///////////////////////////////////////////////////////
- // manager of possibly-multiple internet audio streams
- LLAudioStreamManagerFMOD::LLAudioStreamManagerFMOD(const std::string& url) :
- mInternetStream(NULL),
- mReady(false)
- {
- mInternetStreamURL = url;
- mInternetStream = FSOUND_Stream_Open(url.c_str(), FSOUND_NORMAL | FSOUND_NONBLOCKING, 0, 0);
- if (!mInternetStream)
- {
- llwarns << "Couldn't open fmod stream, error "
- << FMOD_ErrorString(FSOUND_GetError())
- << llendl;
- mReady = false;
- return;
- }
- mReady = true;
- }
- int LLAudioStreamManagerFMOD::startStream()
- {
- // We need a live and opened stream before we try and play it.
- if (!mInternetStream || getOpenState())
- {
- llwarns << "No internet stream to start playing!" << llendl;
- return -1;
- }
- // Make sure the stream is set to 2D mode.
- FSOUND_Stream_SetMode(mInternetStream, FSOUND_2D);
- return FSOUND_Stream_PlayEx(FSOUND_FREE, mInternetStream, NULL, true);
- }
- bool LLAudioStreamManagerFMOD::stopStream()
- {
- if (mInternetStream)
- {
- int read_percent = 0;
- int status = 0;
- int bitrate = 0;
- unsigned int flags = 0x0;
- FSOUND_Stream_Net_GetStatus(mInternetStream, &status, &read_percent, &bitrate, &flags);
- bool close = true;
- switch (status)
- {
- case FSOUND_STREAM_NET_CONNECTING:
- close = false;
- break;
- case FSOUND_STREAM_NET_NOTCONNECTED:
- case FSOUND_STREAM_NET_BUFFERING:
- case FSOUND_STREAM_NET_READY:
- case FSOUND_STREAM_NET_ERROR:
- default:
- close = true;
- }
- if (close)
- {
- FSOUND_Stream_Close(mInternetStream);
- mInternetStream = NULL;
- return true;
- }
- else
- {
- return false;
- }
- }
- else
- {
- return true;
- }
- }
- int LLAudioStreamManagerFMOD::getOpenState()
- {
- int open_state = FSOUND_Stream_GetOpenState(mInternetStream);
- return open_state;
- }