AL streaming test

src/audio/AL/ALAudio.cpp

@@ -45,9 +45,28 @@ std::shared_ptr<PCMStream> ALStream::getSource() const {
     }
 }
 
-Speaker* ALStream::createSpeaker() {
+bool ALStream::preloadBuffer(uint buffer, bool loop) {
+    size_t read = source->read(this->buffer, BUFFER_SIZE, loop);
+    if (!read)
+        return false;
+    ALenum format = AL::to_al_format(source->getChannels(), source->getBitsPerSample());
+    AL_CHECK(alBufferData(buffer, format, this->buffer, read, source->getSampleRate()));
+    return true;
+}
+
+Speaker* ALStream::createSpeaker(bool loop) {
+    this->loop = loop;
     uint source = al->getFreeSource();
-    // TODO: prepare source and enqueue buffers
+    if (source == 0) {
+        return nullptr;
+    }
+    for (uint i = 0; i < ALStream::STREAM_BUFFERS; i++) {
+        uint buffer = al->getFreeBuffer();
+        if (!preloadBuffer(buffer, loop)) {
+            break;
+        }
+        AL_CHECK(alSourceQueueBuffers(source, 1, &buffer));
+    }
     return new ALSpeaker(al, source, PRIORITY_HIGH);
 }
 
@@ -65,14 +84,40 @@ speakerid_t ALStream::getSpeaker() const {
 }
 
 void ALStream::update(double delta) {
-    // TODO: implement
+    if (this->speaker == 0) {
+        return;
+    }
+    Speaker* speaker = audio::get(this->speaker);
+    if (speaker == nullptr) {
+        speaker = 0;
+        return;
+    }
+    ALSpeaker* alspeaker = dynamic_cast<ALSpeaker*>(speaker);
+    uint source = alspeaker->source;
+    uint processed = AL::getSourcei(source, AL_BUFFERS_PROCESSED);
+
+    while (processed--) {
+        uint buffer;
+        AL_CHECK(alSourceUnqueueBuffers(source, 1, &buffer));
+        unusedBuffers.push(buffer);
+        std::cout << "unqueue " << buffer << std::endl;
+    }
+
+    if (!unusedBuffers.empty()) {
+        uint buffer = unusedBuffers.front();
+        if (preloadBuffer(buffer, loop)) {
+            unusedBuffers.pop();
+            std::cout << "queue " << buffer << std::endl;
+            AL_CHECK(alSourceQueueBuffers(source, 1, &buffer));
+        }
+    }
 }
 
 void ALStream::setTime(duration_t time) {
     // TODO: implement
 }
 
-ALSpeaker::ALSpeaker(ALAudio* al, uint source, int priority) : al(al), source(source), priority(priority) {
+ALSpeaker::ALSpeaker(ALAudio* al, uint source, int priority) : al(al), priority(priority), source(source) {
 }
 
 ALSpeaker::~ALSpeaker() {

src/audio/AL/ALAudio.h

@@ -1,6 +1,7 @@
 #ifndef SRC_AUDIO_AUDIO_H_
 #define SRC_AUDIO_AUDIO_H_
 
+#include <queue>
 #include <vector>
 #include <string>
 #include <glm/glm.hpp>
@@ -43,28 +44,38 @@ namespace audio {
     };
 
     class ALStream : public Stream {
+        static inline constexpr size_t BUFFER_SIZE = 44100;
+        
         ALAudio* al;
         std::shared_ptr<PCMStream> source;
+        std::queue<uint> unusedBuffers;
         speakerid_t speaker = 0;
         bool keepSource;
+        char buffer[BUFFER_SIZE];
+        bool loop = false;
+
+        bool preloadBuffer(uint buffer, bool loop);
     public:
         ALStream(ALAudio* al, std::shared_ptr<PCMStream> source, bool keepSource);
         ~ALStream();
 
         std::shared_ptr<PCMStream> getSource() const override;
         void bindSpeaker(speakerid_t speaker) override;
-        Speaker* createSpeaker() override;
+        Speaker* createSpeaker(bool loop) override;
         speakerid_t getSpeaker() const override;
         void update(double delta) override;
         void setTime(duration_t time) override;       
+
+        static inline constexpr uint STREAM_BUFFERS = 3; 
     };
 
     /// @brief AL source adapter
     class ALSpeaker : public Speaker {
         ALAudio* al;
-        uint source;
         int priority;
     public:
+        uint source;
+
         ALSpeaker(ALAudio* al, uint source, int priority);
         ~ALSpeaker();
 

src/audio/NoAudio.h

@@ -35,25 +35,25 @@ namespace audio {
             }
         }
 
-        std::shared_ptr<PCMStream> getSource() const {
+        std::shared_ptr<PCMStream> getSource() const override {
             return source;
         }
 
-        void bindSpeaker(speakerid_t speaker) {
+        void bindSpeaker(speakerid_t speaker) override {
         }
 
-        Speaker* createSpeaker() {
+        Speaker* createSpeaker(bool loop) override{
             return nullptr;
         }
 
-        speakerid_t getSpeaker() const {
+        speakerid_t getSpeaker() const override {
             return 0;
         }
 
-        void update(double delta) {
+        void update(double delta) override {
         }
 
-        void setTime(duration_t time) {
+        void setTime(duration_t time) override {
         }
     };
 

src/audio/audio.cpp

@@ -13,6 +13,7 @@ namespace audio {
     static speakerid_t nextId = 1;
     static Backend* backend;
     static std::unordered_map<speakerid_t, std::unique_ptr<Speaker>> speakers;
+    static std::unordered_map<speakerid_t, std::shared_ptr<Stream>> streams;
 }
 
 using namespace audio;
@@ -200,6 +201,34 @@ speakerid_t audio::play(
     return id;
 }
 
+speakerid_t audio::play(
+    std::shared_ptr<Stream> stream,
+    glm::vec3 position,
+    float volume,
+    float pitch,
+    bool loop
+) {
+    Speaker* speaker = stream->createSpeaker(loop);
+    if (speaker == nullptr) {
+        remove_lower_priority_speaker(PRIORITY_HIGH);
+        speaker = stream->createSpeaker(loop);
+    }
+    if (speaker == nullptr) {
+        return 0;
+    }
+    speakerid_t id = nextId++;
+    streams.emplace(id, stream);
+    speakers.emplace(id, speaker);
+    stream->bindSpeaker(id);
+
+    speaker->setPosition(position);
+    speaker->setVolume(volume);
+    speaker->setPitch(pitch);
+    speaker->setLoop(false);
+    speaker->play();
+    return id;
+}
+
 Speaker* audio::get(speakerid_t id) {
     auto found = speakers.find(id);
     if (found == speakers.end()) {
@@ -211,6 +240,10 @@ Speaker* audio::get(speakerid_t id) {
 void audio::update(double delta) {
     backend->update(delta);
 
+    for (auto& entry : streams) {
+        entry.second->update(delta);
+    }
+
     for (auto it = speakers.begin(); it != speakers.end();) {
         if (it->second->isStopped()) {
             it = speakers.erase(it);

src/audio/audio.h

@@ -118,8 +118,9 @@ namespace audio {
 
         /// @brief Create new speaker bound to the Stream 
         /// and having high priority
+        /// @param loop is stream looped (required for correct buffers preload)
         /// @return speaker id or 0
-        virtual Speaker* createSpeaker() = 0;
+        virtual Speaker* createSpeaker(bool loop) = 0;
 
         /// @brief Unbind previous speaker and bind new speaker to the stream
         /// @param speaker speaker id or 0 if all you need is unbind speaker
@@ -331,6 +332,21 @@ namespace audio {
         int priority
     );
 
+    /// @brief Play stream in the world
+    /// @param stream target stream
+    /// @param position stream world position
+    /// @param volume stream volume [0.0-1.0]
+    /// @param pitch stream pitch multiplier [0.0-...]
+    /// @param loop loop stream
+    /// @return speaker id or 0
+    extern speakerid_t play(
+        std::shared_ptr<Stream> stream,
+        glm::vec3 position,
+        float volume,
+        float pitch,
+        bool loop
+    );
+
     /// @brief Get speaker by id
     /// @param id speaker id
     /// @return speaker or nullptr

src/coders/ogg.cpp

@@ -17,6 +17,7 @@ static inline const char* vorbis_error_message(int code) {
         case OV_EVERSION: return "vorbis version mismatch";
         case OV_EBADHEADER: return "invalid Vorbis bitstream header";
         case OV_EFAULT: return "internal logic fault";
+        case OV_EINVAL: return "header couldn't be read or are corrupt";
         default:
             return "unknown";
     }
@@ -86,20 +87,24 @@ public:
         if (closed) {
             return 0;
         }
-        int bitstream;
+        int bitstream = 0;
         long bytes = 0;
         size_t size = 0;
         do {
             do {
                 bytes = ov_read(&vf, buffer, bufferSize, 0, 2, true, &bitstream);
                 if (bytes < 0) {
-                    std::cerr << vorbis_error_message(bytes) << std::endl;
+                    std::cerr << "ogg::load_pcm: " << vorbis_error_message(bytes) << " " << bytes << std::endl;
                     continue;
                 }
                 size += bytes;
                 bufferSize -= bytes;
                 buffer += bytes;
-            } while (bytes > 0);
+            } while (bytes > 0 && bufferSize > 0);
+
+            if (bufferSize == 0) {
+                break;
+            }
 
             if (loop) {
                 seek(0);