baidu_media_base.h

00001 // Copyright 2017 Baidu Inc. All Rights Reserved.
00002 // Author: Chen Xihao (chenxihao@baidu.com)
00003 //
00004 // Description: Base class of Media
00005 
00006 #ifndef BAIDU_TINYDU_IOT_OS_SRC_MEDIA_BASE_BAIDU_MEDIA_BASE_H
00007 #define BAIDU_TINYDU_IOT_OS_SRC_MEDIA_BASE_BAIDU_MEDIA_BASE_H
00008 
00009 #include "mbed.h"
00010 #include "baidu_recorder.h"
00011 #include "baidu_media_type.h"
00012 
00013 namespace duer {
00014 
00015 class MediaBase : public Recorder::IPlugin {
00016 public:
00017     int start_play(MediaType type);
00018 
00019     int write(const void* data, size_t size);
00020 
00021     int regulate_voice(unsigned char vol);
00022 
00023     int pause_play();
00024 
00025     int stop_play();
00026 
00027     virtual int start_record();
00028 
00029     virtual size_t read(void* data, size_t size);
00030 
00031     virtual int stop_record();
00032 
00033 protected:
00034     virtual int on_start_play(MediaType type) = 0;
00035 
00036     virtual int on_write(const void* data, size_t size) = 0;
00037 
00038     virtual int on_voice(unsigned char vol) = 0;
00039 
00040     virtual int on_pause_play() = 0;
00041 
00042     virtual int on_stop_play() = 0;
00043 
00044     virtual int on_start_record() = 0;
00045 
00046     virtual size_t on_read(void* data, size_t size) = 0;
00047 
00048     virtual int on_stop_record() = 0;
00049 
00050 private:
00051     static rtos::Mutex      _s_lock;
00052     static int              _s_status;
00053 };
00054 
00055 } // namespace duer
00056 
00057 #endif // BAIDU_TINYDU_IOT_OS_SRC_MEDIA_BASE_BAIDU_MEDIA_BASE_H