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Diffstat (limited to 'indra/llaudio/llstreamingaudio_fmod.cpp')
-rw-r--r-- | indra/llaudio/llstreamingaudio_fmod.cpp | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/indra/llaudio/llstreamingaudio_fmod.cpp b/indra/llaudio/llstreamingaudio_fmod.cpp new file mode 100644 index 0000000000..a71a87203c --- /dev/null +++ b/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; +} |