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DuerOS-Light-SDK-v1.1.0/duer-os-light/src/media-player/baidu_media_play_buffer.h@47:9e361da97763, 2017-07-18 (annotated)

Committer:
TMBOY
Date:
Tue Jul 18 16:54:45 2017 +0800
Revision:
47:9e361da97763
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Who changed what in which revision?

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TMBOY 47:9e361da97763 1 // Copyright 2017 Baidu Inc. All Rights Reserved.
TMBOY 47:9e361da97763 2 // Author: Chen Xihao (chenxihao@baidu.com)
TMBOY 47:9e361da97763 3 //
TMBOY 47:9e361da97763 4 // Description: Buffer for media player
TMBOY 47:9e361da97763 5
TMBOY 47:9e361da97763 6 #ifndef BAIDU_TINYDU_IOT_OS_SRC_MEDIA_PLAYER_BAIDU_MEDIA_PLAY_BUFFER_H
TMBOY 47:9e361da97763 7 #define BAIDU_TINYDU_IOT_OS_SRC_MEDIA_PLAYER_BAIDU_MEDIA_PLAY_BUFFER_H
TMBOY 47:9e361da97763 8
TMBOY 47:9e361da97763 9 #include "rtos.h"
TMBOY 47:9e361da97763 10
TMBOY 47:9e361da97763 11 namespace duer {
TMBOY 47:9e361da97763 12
TMBOY 47:9e361da97763 13 // FIFO circle buffer
TMBOY 47:9e361da97763 14 class MediaPlayBuffer {
TMBOY 47:9e361da97763 15 public:
TMBOY 47:9e361da97763 16 MediaPlayBuffer(void* buffer, size_t size);
TMBOY 47:9e361da97763 17
TMBOY 47:9e361da97763 18 ~MediaPlayBuffer();
TMBOY 47:9e361da97763 19
TMBOY 47:9e361da97763 20 // write buffer until buffer has enough space
TMBOY 47:9e361da97763 21 void write(const void* data, size_t size);
TMBOY 47:9e361da97763 22
TMBOY 47:9e361da97763 23 // read buffer until buffer has enough data
TMBOY 47:9e361da97763 24 void read(void* data, size_t size);
TMBOY 47:9e361da97763 25
TMBOY 47:9e361da97763 26 void clear();
TMBOY 47:9e361da97763 27
TMBOY 47:9e361da97763 28 static const size_t MIN_BUFFER_SIZE = 5 * 1024;
TMBOY 47:9e361da97763 29
TMBOY 47:9e361da97763 30 static const size_t DEFAULT_BUFFER_SIZE = 10 * 1024;
TMBOY 47:9e361da97763 31
TMBOY 47:9e361da97763 32 private:
TMBOY 47:9e361da97763 33 MediaPlayBuffer(const MediaPlayBuffer&);
TMBOY 47:9e361da97763 34
TMBOY 47:9e361da97763 35 MediaPlayBuffer& operator=(const MediaPlayBuffer&);
TMBOY 47:9e361da97763 36
TMBOY 47:9e361da97763 37 char* const _buffer;
TMBOY 47:9e361da97763 38 const size_t _BUFFER_SIZE;
TMBOY 47:9e361da97763 39 Mutex _mutex;
TMBOY 47:9e361da97763 40 bool _wait;
TMBOY 47:9e361da97763 41 Semaphore _semaphore;
TMBOY 47:9e361da97763 42 int _start;
TMBOY 47:9e361da97763 43 int _end;
TMBOY 47:9e361da97763 44 };
TMBOY 47:9e361da97763 45
TMBOY 47:9e361da97763 46 } // namespace duer
TMBOY 47:9e361da97763 47
TMBOY 47:9e361da97763 48 #endif // BAIDU_TINYDU_IOT_OS_SRC_MEDIA_PLAYER_BAIDU_MEDIA_PLAY_BUFFER_H