GuiLite/core/core_include/wave_buffer.h
2019-01-17 14:39:18 +08:00

37 lines
798 B
C++

#ifndef _WAVE_BUFFER_H_
#define _WAVE_BUFFER_H_
#define WAVE_BUFFER_LEN 1024
#define WAVE_READ_CACHE_LEN 8
#define BUFFER_EMPTY -1111
#define BUFFER_FULL -2222;
class c_wave_buffer
{
public:
c_wave_buffer();
int write_wave_data(short data);
int read_wave_data_by_frame(short &max, short &min, short frame_len, unsigned int sequence, short offset);
void reset();
void clear_data();
short get_cnt();
private:
int read_data();
short m_wave_buf[WAVE_BUFFER_LEN];
short m_head;
short m_tail;
int m_min_old;
int m_max_old;
int m_min_older;
int m_max_older;
int m_last_data;
short m_read_cache_min[WAVE_READ_CACHE_LEN];
short m_read_cache_mid[WAVE_READ_CACHE_LEN];
short m_read_cache_max[WAVE_READ_CACHE_LEN];
short m_read_cache_sum;
unsigned int m_refresh_sequence;
};
#endif