Imported existing code

indra/llaudio/llstreamingaudio_fmod.cpp

@@ -0,0 +1,362 @@
+/** 
+ * @file streamingaudio_fmod.cpp
+ * @brief LLStreamingAudio_FMOD implementation
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
+ * Copyright (c) 2009, 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 << "InternetSteam - 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;
+}