391 lines
8.8 KiB
C++
391 lines
8.8 KiB
C++
/**
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* @file streamingaudio_fmod.cpp
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* @brief LLStreamingAudio_FMOD implementation
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*
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* $LicenseInfo:firstyear=2009&license=viewergpl$
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*
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* Copyright (c) 2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include "llmath.h"
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#include "fmod.h"
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#include "fmod_errors.h"
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#include "llstreamingaudio_fmod.h"
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class LLAudioStreamManagerFMOD
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{
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public:
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LLAudioStreamManagerFMOD(const std::string& url);
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int startStream();
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bool stopStream(); // Returns true if the stream was successfully stopped.
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bool ready();
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const std::string& getURL() { return mInternetStreamURL; }
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int getOpenState();
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FSOUND_STREAM* getStream() { return mInternetStream; }
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protected:
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FSOUND_STREAM* mInternetStream;
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bool mReady;
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std::string mInternetStreamURL;
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};
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//---------------------------------------------------------------------------
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// Internet Streaming
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//---------------------------------------------------------------------------
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LLStreamingAudio_FMOD::LLStreamingAudio_FMOD() :
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mCurrentInternetStreamp(NULL),
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mFMODInternetStreamChannel(-1),
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mGain(1.0f),
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mMetaData(NULL)
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{
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// Number of milliseconds of audio to buffer for the audio card.
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// Must be larger than the usual Second Life frame stutter time.
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FSOUND_Stream_SetBufferSize(200);
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// Here's where we set the size of the network buffer and some buffering
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// parameters. In this case we want a network buffer of 16k, we want it
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// to prebuffer 40% of that when we first connect, and we want it
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// to rebuffer 80% of that whenever we encounter a buffer underrun.
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// Leave the net buffer properties at the default.
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//FSOUND_Stream_Net_SetBufferProperties(20000, 40, 80);
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}
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LLStreamingAudio_FMOD::~LLStreamingAudio_FMOD()
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{
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// nothing interesting/safe to do.
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}
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signed char F_CALLBACKAPI MetaDataCallback(char *name, char *value, void *userdata)
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{
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std::string szName(name);
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if(szName == "TITLE" || szName=="TIT2" || szName=="Title")
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(*(LLSD*)userdata)["TITLE"] = value;
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if(szName == "ARTIST" || szName=="TPE1" || szName =="WM/AlbumTitle")
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(*(LLSD*)userdata)["ARTIST"] = value;
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else
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(*(LLSD*)userdata)[std::string(name)] = value;
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return true;
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}
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void LLStreamingAudio_FMOD::start(const std::string& url)
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{
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//if (!mInited)
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//{
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// llwarns << "startInternetStream before audio initialized" << llendl;
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// return;
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//}
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// "stop" stream but don't clear url, etc. in case url == mInternetStreamURL
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stop();
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if (!url.empty())
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{
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llinfos << "Starting internet stream: " << url << llendl;
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mCurrentInternetStreamp = new LLAudioStreamManagerFMOD(url);
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mURL = url;
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if(mCurrentInternetStreamp->getStream())
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{
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mMetaData = new LLSD;
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}
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}
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else
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{
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llinfos << "Set internet stream to null" << llendl;
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mURL.clear();
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}
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}
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void LLStreamingAudio_FMOD::update()
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{
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// Kill dead internet streams, if possible
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std::list<LLAudioStreamManagerFMOD *>::iterator iter;
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for (iter = mDeadStreams.begin(); iter != mDeadStreams.end();)
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{
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LLAudioStreamManagerFMOD *streamp = *iter;
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if (streamp->stopStream())
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{
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llinfos << "Closed dead stream" << llendl;
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delete streamp;
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mDeadStreams.erase(iter++);
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}
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else
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{
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iter++;
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}
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}
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// Don't do anything if there are no streams playing
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if (!mCurrentInternetStreamp)
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{
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return;
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}
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int open_state = mCurrentInternetStreamp->getOpenState();
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if (!open_state)
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{
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// Stream is live
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// start the stream if it's ready
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if (mFMODInternetStreamChannel < 0)
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{
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mFMODInternetStreamChannel = mCurrentInternetStreamp->startStream();
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if (mFMODInternetStreamChannel != -1)
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{
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// Reset volume to previously set volume
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setGain(getGain());
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FSOUND_SetPaused(mFMODInternetStreamChannel, false);
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if(mCurrentInternetStreamp->getStream() && mMetaData)
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{
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FSOUND_Stream_Net_SetMetadataCallback(mCurrentInternetStreamp->getStream(),&MetaDataCallback, mMetaData);
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}
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}
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}
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}
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switch(open_state)
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{
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default:
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case 0:
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// success
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break;
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case -1:
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// stream handle is invalid
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llwarns << "InternetStream - invalid handle" << llendl;
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stop();
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return;
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case -2:
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// opening
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break;
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case -3:
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// failed to open, file not found, perhaps
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llwarns << "InternetStream - failed to open" << llendl;
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stop();
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return;
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case -4:
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// connecting
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break;
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case -5:
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// buffering
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break;
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}
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}
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void LLStreamingAudio_FMOD::stop()
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{
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if(mMetaData)
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{
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if(mCurrentInternetStreamp && mCurrentInternetStreamp->getStream())
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FSOUND_Stream_Net_SetMetadataCallback(mCurrentInternetStreamp->getStream(),NULL,NULL);
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delete mMetaData;
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mMetaData = NULL;
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}
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if (mFMODInternetStreamChannel != -1)
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{
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FSOUND_SetPaused(mFMODInternetStreamChannel, true);
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FSOUND_SetPriority(mFMODInternetStreamChannel, 0);
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mFMODInternetStreamChannel = -1;
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}
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if (mCurrentInternetStreamp)
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{
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llinfos << "Stopping internet stream: " << mCurrentInternetStreamp->getURL() << llendl;
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if (mCurrentInternetStreamp->stopStream())
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{
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delete mCurrentInternetStreamp;
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}
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else
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{
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llwarns << "Pushing stream to dead list: " << mCurrentInternetStreamp->getURL() << llendl;
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mDeadStreams.push_back(mCurrentInternetStreamp);
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}
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mCurrentInternetStreamp = NULL;
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//mURL.clear();
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}
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}
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void LLStreamingAudio_FMOD::pause(int pauseopt)
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{
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if (pauseopt < 0)
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{
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pauseopt = mCurrentInternetStreamp ? 1 : 0;
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}
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if (pauseopt)
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{
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if (mCurrentInternetStreamp)
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{
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stop();
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}
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}
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else
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{
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start(getURL());
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}
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}
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// A stream is "playing" if it has been requested to start. That
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// doesn't necessarily mean audio is coming out of the speakers.
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int LLStreamingAudio_FMOD::isPlaying()
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{
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if (mCurrentInternetStreamp)
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{
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return 1; // Active and playing
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}
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else if (!mURL.empty())
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{
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return 2; // "Paused"
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}
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else
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{
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return 0;
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}
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}
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F32 LLStreamingAudio_FMOD::getGain()
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{
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return mGain;
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}
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std::string LLStreamingAudio_FMOD::getURL()
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{
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return mURL;
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}
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void LLStreamingAudio_FMOD::setGain(F32 vol)
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{
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mGain = vol;
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if (mFMODInternetStreamChannel != -1)
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{
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vol = llclamp(vol * vol, 0.f, 1.f);
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int vol_int = llround(vol * 255.f);
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FSOUND_SetVolumeAbsolute(mFMODInternetStreamChannel, vol_int);
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}
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}
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///////////////////////////////////////////////////////
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// manager of possibly-multiple internet audio streams
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LLAudioStreamManagerFMOD::LLAudioStreamManagerFMOD(const std::string& url) :
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mInternetStream(NULL),
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mReady(false)
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{
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mInternetStreamURL = url;
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mInternetStream = FSOUND_Stream_Open(url.c_str(), FSOUND_NORMAL | FSOUND_NONBLOCKING, 0, 0);
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if (!mInternetStream)
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{
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llwarns << "Couldn't open fmod stream, error "
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<< FMOD_ErrorString(FSOUND_GetError())
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<< llendl;
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mReady = false;
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return;
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}
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mReady = true;
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}
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int LLAudioStreamManagerFMOD::startStream()
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{
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// We need a live and opened stream before we try and play it.
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if (!mInternetStream || getOpenState())
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{
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llwarns << "No internet stream to start playing!" << llendl;
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return -1;
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}
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// Make sure the stream is set to 2D mode.
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FSOUND_Stream_SetMode(mInternetStream, FSOUND_2D);
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return FSOUND_Stream_PlayEx(FSOUND_FREE, mInternetStream, NULL, true);
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}
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bool LLAudioStreamManagerFMOD::stopStream()
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{
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if (mInternetStream)
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{
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int read_percent = 0;
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int status = 0;
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int bitrate = 0;
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unsigned int flags = 0x0;
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FSOUND_Stream_Net_GetStatus(mInternetStream, &status, &read_percent, &bitrate, &flags);
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bool close = true;
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switch (status)
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{
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case FSOUND_STREAM_NET_CONNECTING:
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close = false;
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break;
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case FSOUND_STREAM_NET_NOTCONNECTED:
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case FSOUND_STREAM_NET_BUFFERING:
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case FSOUND_STREAM_NET_READY:
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case FSOUND_STREAM_NET_ERROR:
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default:
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close = true;
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}
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if (close)
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{
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FSOUND_Stream_Close(mInternetStream);
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mInternetStream = NULL;
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return true;
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}
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else
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{
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return false;
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}
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}
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else
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{
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return true;
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}
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}
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int LLAudioStreamManagerFMOD::getOpenState()
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{
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int open_state = FSOUND_Stream_GetOpenState(mInternetStream);
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return open_state;
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}
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