refactoring needed for win32 crash

[chaz/yoink] / src / Moof / Sound.cc

/*******************************************************************************

 Copyright (c) 2009, Charles McGarvey
 All rights reserved.
 
 Redistribution   and   use  in  source  and  binary  forms,  with  or  without
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     this list of conditions and the following disclaimer.
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     this  list of conditions and the following disclaimer in the documentation
     and/or other materials provided with the distribution.
 
 THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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*******************************************************************************/

#include <cstdio>
#include <deque>
#include <list>
#include <string>

#include <AL/al.h>
#include <vorbis/codec.h>
#include <vorbis/vorbisfile.h>

#include "Core.hh"
#include "Error.hh"
#include "Library.hh"
#include "Log.hh"
#include "Sound.hh"
#include "Timer.hh"

#define BUFFER_SIZE (64 * 1024)
//#define BUFFER_SIZE (5*2048)

namespace Mf {


class Sound::Impl
{
public:

        static ALenum getAudioFormat(const vorbis_info* audioInfo)
        {
                if (audioInfo->channels == 1) return AL_FORMAT_MONO16;
                else                                              return AL_FORMAT_STEREO16;
        }
        

        class Buffer;
        typedef boost::shared_ptr<Buffer> BufferP;
        
        class Buffer : public Library<Buffer>
        {
        public:

                explicit Buffer(const std::string& name) :
                        Library<Buffer>(name),
                        mBuffer(-1)
                {
                        mOggStream.datasource = 0;
                        openFile();
                }

                ~Buffer()
                {
                        if (mOggStream.datasource)
                        {
                                ov_clear(&mOggStream);
                        }
                        if (int(mBuffer) != -1) alDeleteBuffers(1, &mBuffer);
                }


                void openFile()
                {
                        if (mOggStream.datasource)
                        {
                                ov_clear(&mOggStream);
                                mOggStream.datasource = 0;
                        }

                        std::string filePath = Sound::getPath(getName());
                        int result = ov_fopen((char*)filePath.c_str(), &mOggStream);

                        if (result < 0)
                        {
                                logWarning << "error while loading sound "
                                                   << getName() << std::endl;
                                throw Error(Error::UNKNOWN_AUDIO_FORMAT, getName());
                        }

                        vorbis_info* vorbisInfo = ov_info(&mOggStream, -1);
                        mFormat = getAudioFormat(vorbisInfo);
                        mFreq = vorbisInfo->rate;
                }


                void loadAll(ALuint source)
                {
                        if (!mOggStream.datasource) openFile();
                        if (!mOggStream.datasource) return;

                        char data[BUFFER_SIZE];
                        int size = 0;

                        for (;;)
                        {
                                int section;
                                int result = ov_read(&mOggStream, data + size,
                                                BUFFER_SIZE - size, 0, 2, 1, &section);

                                if (result > 0)
                                {
                                        size += result;
                                }
                                else
                                {
                                        if (result < 0) logWarning("vorbis playback error");
                                        break;
                                }
                        }
                        if (size == 0)
                        {
                                logWarning << "decoded no bytes from "
                                                   << getName() << std::endl;
                                return;
                        }

                        alGenBuffers(1, &mBuffer);

                        alBufferData(mBuffer, mFormat, data, size, mFreq);
                        alSourcei(source, AL_BUFFER, mBuffer);

                        // don't need to keep this loaded
                        ov_clear(&mOggStream);
                        mOggStream.datasource = 0;
                }

                bool stream(ALuint buffer)
                {
                        char data[BUFFER_SIZE];
                        int size = 0;

                        while (size < BUFFER_SIZE)
                        {
                                int section;
                                int result = ov_read(&mOggStream, data + size,
                                                BUFFER_SIZE - size, 0, 2, 1, &section);

                                if (result > 0)
                                {
                                        size += result;
                                }
                                else
                                {
                                        if (result < 0) logWarning("vorbis playback error");
                                        break;
                                }
                        }

                        if (size == 0) return false;

                        alBufferData(buffer, mFormat, data, size, mFreq);

                        return true;
                }

                void rewind()
                {
                        if (!mOggStream.datasource) openFile();
                        else ov_raw_seek(&mOggStream, 0);
                }


        private:

                OggVorbis_File  mOggStream;
                ALenum                  mFormat;
                ALsizei                 mFreq;
                ALuint                  mBuffer;
        };


        Impl()
        {
                init();
        }

        Impl(const std::string& name)
        {
                init();
                enqueue(name);
        }

        void init()
        {
                mIsLoaded = false;
                mIsPlaying = false;
                mIsLooping = false;

                alGenSources(1, &mSource);

                ALfloat zero[] = {0.0f, 0.0f, 0.0f};
                alSourcef(mSource,  AL_PITCH, 1.0f);
                alSourcef(mSource,  AL_GAIN, 1.0f);
                alSourcefv(mSource, AL_POSITION, zero);
                alSourcefv(mSource, AL_VELOCITY, zero);

                alSourcei(mSource, AL_LOOPING, mIsLooping);
        }

        ~Impl()
        {
                stop();

                alDeleteSources(1, &mSource);

                while (!mBuffers.empty())
                {
                        alDeleteBuffers(1, &mBuffers.back());
                        mBuffers.pop_back();
                }
        }


        void play()
        {
                if (mQueue.empty()) return;

                if (!mIsLoaded) mQueue.front()->loadAll(mSource);

                alSourcePlay(mSource);
                mIsLoaded = true;
        }


        void playStream()
        {
                if (mQueue.empty()) return;

                if (!mIsPlaying)
                {
                        alSourcei(mSource, AL_LOOPING, false);
                        bufferStream();
                }

                if (!mStreamTimer.isValid())
                {
                        mStreamTimer.init(boost::bind(&Impl::streamUpdate, this, _1, _2),
                                        1.0, Timer::REPEAT);
                }

                alSourcePlay(mSource);
                mIsPlaying = true;
        }

        void bufferStream()
        {
                ALuint buffer;
                for (int i = mBuffers.size(); i <= 8; ++i)
                {
                        alGenBuffers(1, &buffer);

                        if (mQueue.front()->stream(buffer))
                        {
                                alSourceQueueBuffers(mSource, 1, &buffer);
                                mBuffers.push_back(buffer);
                        }
                        else
                        {
                                alDeleteBuffers(1, &buffer);
                                break;
                        }
                }
        }


        void update()
        {
                ALint finished = 0;

                alGetSourcei(mSource, AL_BUFFERS_PROCESSED, &finished);

                while (finished-- > 0)
                {
                        ALuint bufferObj;
                        alSourceUnqueueBuffers(mSource, 1, &bufferObj);

                        BufferP buffer = mQueue.front();
                        bool streamed = buffer->stream(bufferObj);

                        if (streamed)
                        {
                                alSourceQueueBuffers(mSource, 1, &bufferObj);
                        }
                        else
                        {
                                // the buffer couldn't be streamed, so get rid of it
                                mQueue.pop_front();

                                if (!mQueue.empty())
                                {
                                        // begin the next buffer in the queue
                                        mQueue.front()->rewind();
                                        mQueue.front()->stream(bufferObj);
                                        alSourceQueueBuffers(mSource, 1, &bufferObj);
                                        logInfo("loading new buffer");

                                        // queue up any unused buffers
                                        bufferStream();
                                }
                                else if (mIsLooping)
                                {
                                        // reload the same buffer
                                        mQueue.push_back(buffer);
                                        buffer->rewind();
                                        buffer->stream(bufferObj);
                                        alSourceQueueBuffers(mSource, 1, &bufferObj);
                                        logInfo("looping same buffer");
                                }
                                else
                                {
                                        // nothing more to play, stopping...
                                        mIsPlaying = false;
                                        std::remove(mBuffers.begin(), mBuffers.end(), bufferObj);
                                }
                        }
                }

                ALenum state;
                alGetSourcei(mSource, AL_SOURCE_STATE, &state);

                // restart playing if we're stopped but supposed to be playing... this
                // means we didn't queue enough and the audio skipped :-(
                if (mIsPlaying && state != AL_PLAYING)
                {
                        alSourcePlay(mSource);
                }
        }


        void stop()
        {
                alSourceStop(mSource);
                mIsPlaying = false;

                mStreamTimer.invalidate();
        }

        void pause()
        {
                alSourcePause(mSource);
                mIsPlaying = false;

                mStreamTimer.invalidate();
        }


        void setSample(const std::string& name)
        {
                stop();
                alSourcei(mSource, AL_BUFFER, AL_NONE);

                mQueue.clear();
                mIsLoaded = false;

                enqueue(name);

                while (!mBuffers.empty())
                {
                        alDeleteBuffers(1, &mBuffers.back());
                        mBuffers.pop_back();
                }
        }

        void enqueue(const std::string& name)
        {
                BufferP buffer = Buffer::getInstance(name);
                mQueue.push_back(buffer);
        }


        bool isPlaying() const
        {
                if (mIsPlaying) return true;

                ALenum state;
                alGetSourcei(mSource, AL_SOURCE_STATE, &state);

                return state == AL_PLAYING;
        }


        void setLooping(bool looping)
        {
                mIsLooping = looping;

                ALenum type;
                alGetSourcei(mSource, AL_SOURCE_TYPE, &type);

                if (type != AL_STREAMING)
                {
                        alSourcei(mSource, AL_LOOPING, mIsLooping);
                }
        }


        void streamUpdate(Timer& timer, Scalar t)
        {
                // don't let the music die!
                update();
                // TODO - might be nice to also allow using threads for streaming rather
                // than a timer, probably as a compile-time option
        }


        ALuint                                  mSource;
        std::list<ALuint>               mBuffers;

        bool                                    mIsLoaded;
        bool                                    mIsPlaying;
        bool                                    mIsLooping;

        std::deque<BufferP>             mQueue;

        Timer                                   mStreamTimer;

        Backend                                 mBackend;
};


Sound::Sound() :
        // pass through
        mImpl(new Sound::Impl) {}

Sound::Sound(const std::string& name) :
        // pass through
        mImpl(new Sound::Impl(name)) {}


void Sound::setSample(const std::string& name)
{
        // pass through
        mImpl->setSample(name);
}


void Sound::play()
{
        // pass through
        mImpl->play();
}

void Sound::stop()
{
        // pass through
        mImpl->stop();
}

void Sound::pause()
{
        // pass through
        mImpl->pause();
}


void Sound::toggle()
{
        if (isPlaying()) pause();
        else play();
}

bool Sound::isPlaying() const
{
        // pass through
        return mImpl->isPlaying();
}


void Sound::setPosition(const Vector3& position)
{
        float vec[3] = {position[0], position[1], position[2]};
        alSourcefv(mImpl->mSource, AL_POSITION, vec);
}

void Sound::setVelocity(const Vector3& velocity)
{
        float vec[3] = {velocity[0], velocity[1], velocity[2]};
        alSourcefv(mImpl->mSource, AL_VELOCITY, vec);
}

void Sound::setGain(Scalar gain)
{
        alSourcef(mImpl->mSource, AL_GAIN, float(gain));
}

void Sound::setPitch(Scalar pitch)
{
        alSourcef(mImpl->mSource, AL_PITCH, float(pitch));
}

void Sound::setLooping(bool looping)
{
        // pass through
        mImpl->setLooping(looping);
}


void Sound::setListenerPosition(const Vector3& position)
{
        //alListener3f(AL_POSITION, float(position[0]), float(position[1]),
                        //float(position[2]));
        float vec[] = {position[0], position[1], position[2]};
        alListenerfv(AL_POSITION, vec);
}

void Sound::setListenerVelocity(const Vector3& velocity)
{
        //alListener3f(AL_VELOCITY, float(velocity[0]), float(velocity[1]),
                        //float(velocity[2]));
        float vec[] = {velocity[0], velocity[1], velocity[2]};
        alListenerfv(AL_VELOCITY, vec);
}

void Sound::setListenerOrientation(const Vector3& forward, const Vector3& up)
{
        float vec[6];
        vec[0] = float(forward[0]);
        vec[1] = float(forward[1]);
        vec[2] = float(forward[2]);
        vec[3] = float(up[0]);
        vec[4] = float(up[1]);
        vec[5] = float(up[2]);
        alListenerfv(AL_ORIENTATION, vec);
}


std::string Sound::getPath(const std::string& name)
{
        std::string path = Resource::getPath("sounds/" + name + ".ogg");
        return path;
}


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


void SoundStream::enqueue(const std::string& name)
{
        // pass through
        mImpl->enqueue(name);
}


void SoundStream::play()
{
        // pass through
        mImpl->playStream();
}


} // namespace Mf

/** vim: set ts=4 sw=4 tw=80: *************************************************/