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#ifndef __JIN_SOURCE_SDL_H
#define __JIN_SOURCE_SDL_H
#include <vector>
#include <queue>
#include <stack>
#include <exception>
#include "../source.h"
namespace jin
{
namespace audio
{
typedef struct SDLSourceCommand;
class SDLSource : public Source
{
public:
~SDLSource();
static SDLSource* createSource(SourceType format, const char* file);
static SDLSource* createSource(SourceType format, void* mem, size_t size);
/* ISource interface */
void play() override;
void stop() override;
void pause() override;
void resume() override;
void rewind() override;
bool isStopped() const override;
bool isPaused() const override;
void setPitch(float pitch) override;
// Ͻ
void setVolume(float volume) override;
bool setLoop(bool loop) override;
void setRate(float rate) override;
private:
SDLSource();
friend class SDLSourceManager;
void loadWAV(void* mem, int size);
void loadOGG(void* mem, int size);
inline bool is(int state) const { return (status.state & state) == state; }
struct
{
const void* data; // Ƶ
int size; // dataֽڳ
const void* end; // dataβ = (unsigned char*)data + size
int rate; // Ƶ
unsigned char bitdepth; // ÿsampleıس
int samples; // sample = size / (bitdepth / 8)
unsigned char channel; // channel12
char silence; // 0
} raw;
/* Procedure controller variable */
struct
{
int pos; // ǰŵλ
int pitch; // pitch
int state; // ǰ״̬
bool loop; // loop or not
int volume; //
} status;
};
class SDLSourceManager
{
public:
static SDLSourceManager* get();
/* Process function */
static void processCommands();
static void processSources(Uint8* buffer, int len);
private:
friend class SDLSource;
static void removeSource(SDLSource* source);
static void pushSource(SDLSource* source);
static SDLSourceCommand* getCommand();
static void pushCommand(SDLSourceCommand* cmd);
static void collectCommand(SDLSourceCommand* cmd);
static SDLSourceManager* manager;
static std::queue<SDLSourceCommand*> commands;
static std::stack<SDLSourceCommand*> commandsPool;
static std::vector<SDLSource*> sources; // processing sources
};
class SourceException : public std::exception
{
const char * what() const throw ()
{
return "Load Source Exception";
}
};
}
}
#endif
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