1 files changed, 121 insertions, 0 deletions

diff --git a/src/libjin/Audio/SDL/SDLAudio.cpp b/src/libjin/Audio/SDL/SDLAudio.cpp
new file mode 100644
index 0000000..c154ae4
--- /dev/null
+++ b/src/libjin/Audio/SDL/SDLAudio.cpp
@@ -0,0 +1,121 @@
+#include "../../modules.h"
+#if JIN_MODULES_AUDIO && JIN_AUDIO_SDLAUDIO
+
+#include <iostream>
+#include "SDLAudio.h"
+#include "SDLSource.h"
+#include "../../math/math.h"
+#include "../../utils/log.h"
+
+namespace jin
+{
+namespace audio
+{
+
+    /* ע��callback������Ƶ�̵߳��� */
+    static void defaultCallback(void *userdata, Uint8 *stream, int size)
+    {
+        static SDLAudio* audio = static_cast<SDLAudio*>(userdata);
+        audio->lock();
+        audio->processCommands();
+        audio->processSources(stream, size);
+        audio->unlock();
+    }
+
+    onlyonce bool SDLAudio::initSystem(const SettingBase* s)
+    {
+        Loghelper::log(Loglevel::LV_INFO, "Init Audio System");
+
+        if (SDL_Init(SDL_INIT_AUDIO) < 0)
+            return false;
+        SDL_AudioSpec spec;
+        Setting* setting = (Setting*)s;
+        if (setting == nullptr)
+            return false;
+
+        unsigned int samplerate = setting->samplerate;
+        unsigned int samples = clamp(setting->samples, 1, setting->samplerate);
+
+        spec.freq     = samplerate;        // ÿ�������sample��,���õ��� 11025, 22050, 44100 and 48000 Hz. 
+        spec.format   = AUDIO_S16SYS;      // signed 16-bit samples in native byte order
+        spec.channels = SDLAUDIO_CHANNELS; // ������
+        spec.samples  = samples;           // ÿ�β���ʱ��һ�������ã����=setting->samplerate��ÿ��ֻ����1��
+        spec.userdata = this;
+        spec.callback = defaultCallback;
+
+        audioDevice = SDL_OpenAudioDevice(NULL, 0, &spec, NULL, 0);
+        if (audioDevice == 0)
+            return false;
+        /* start audio */
+        SDL_PauseAudioDevice(audioDevice, 0);
+        return true;
+    }
+
+    onlyonce void SDLAudio::quitSystem()
+    {
+        SDL_CloseAudio();
+    }
+
+    void SDLAudio::lock()
+    {
+        SDL_LockAudioDevice(audioDevice);
+    }
+
+    void SDLAudio::unlock()
+    {
+        SDL_UnlockAudioDevice(audioDevice);
+    }
+
+    void SDLAudio::processCommands()
+    {
+        SDLSourceManager::get()->processCommands();
+    }
+
+    void SDLAudio::processSources(void* buffer, size_t len)
+    {
+        SDLSourceManager::get()->processSources(buffer, len);
+    }
+
+    void SDLAudio::play() {}
+    
+    void SDLAudio::stop() {}
+    
+    bool SDLAudio::pause()
+    {
+        return false;
+    }
+
+    bool SDLAudio::pause(Source* source)
+    {
+        return false; 
+    }
+    
+    bool SDLAudio::resume()
+    {
+        return false;
+    }
+    
+    bool SDLAudio::resume(Source* source)
+    {
+        return false;
+    }
+    
+    void SDLAudio::rewind() 
+    {
+    
+    }
+    
+    void SDLAudio::setVolume(float volume) 
+    {
+    
+    }
+    
+    float SDLAudio::getVolume() 
+    {
+        return 0.f;
+    }
+
+}
+}
+
+#endif // JIN_MODULES_AUDIO && JIN_AUDIO_SDLAUDIO
\ No newline at end of file