103 lines
2.3 KiB
C++
103 lines
2.3 KiB
C++
#include "core_include/api.h"
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#include "../widgets_include/wave_buffer.h"
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#include <string.h>
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#include <stdio.h>
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#define MAX(a,b) (((a)>(b))?(a):(b))
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#define MIN(a,b) (((a)<(b))?(a):(b))
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c_wave_buffer::c_wave_buffer()
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{
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m_head = m_tail = m_min_old = m_max_old =
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m_min_older = m_max_older = m_last_data = m_read_cache_sum = m_refresh_sequence = 0;
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memset(m_wave_buf, 0, sizeof(m_wave_buf));
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memset(m_read_cache_min, 0, sizeof(m_read_cache_min));
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memset(m_read_cache_mid, 0, sizeof(m_read_cache_mid));
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memset(m_read_cache_max, 0, sizeof(m_read_cache_max));
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}
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short c_wave_buffer::get_cnt()
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{
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return (m_tail >= m_head)?(m_tail - m_head):(m_tail - m_head + WAVE_BUFFER_LEN);
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}
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int c_wave_buffer::write_wave_data(short data)
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{
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if ((m_tail + 1) % WAVE_BUFFER_LEN == m_head)
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{//full
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//log_out("wave buf full\n");
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return BUFFER_FULL;
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}
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m_wave_buf[m_tail] = data;
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m_tail = (m_tail + 1) % WAVE_BUFFER_LEN;
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return 1;
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}
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int c_wave_buffer::read_data()
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{
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if (m_head == m_tail)
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{//empty
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//log_out("wave buf empty\n");
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return BUFFER_EMPTY;
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}
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int ret = m_wave_buf[m_head];
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m_head = (m_head + 1) % WAVE_BUFFER_LEN;
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return ret;
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}
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int c_wave_buffer::read_wave_data_by_frame(short &max, short &min, short frame_len, unsigned int sequence, short offset)
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{
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if (m_refresh_sequence != sequence)
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{
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m_refresh_sequence = sequence;
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m_read_cache_sum = 0;
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}
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else if(offset < m_read_cache_sum)//(m_refresh_sequence == sequence && offset < m_fb_sum)
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{
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max = m_read_cache_max[offset];
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min = m_read_cache_min[offset];
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return m_read_cache_mid[offset];
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}
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m_read_cache_sum++;
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ASSERT(m_read_cache_sum <= WAVE_READ_CACHE_LEN);
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int i, data;
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int tmp_min = m_last_data;
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int tmp_max = m_last_data;
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int mid = (m_min_old + m_max_old)>>1;
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i = 0;
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while(i++ < frame_len)
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{
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data = read_data();
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if(BUFFER_EMPTY == data)
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{
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break;
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}
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m_last_data = data;
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if(data < tmp_min){tmp_min = data;}
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if(data > tmp_max){tmp_max = data;}
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}
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min = m_read_cache_min[offset] = MIN(m_min_old, MIN(tmp_min, m_min_older));
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max = m_read_cache_max[offset] = MAX(m_max_old, MAX(tmp_max, m_max_older));
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m_min_older = m_min_old;
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m_max_older = m_max_old;
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m_min_old = tmp_min;
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m_max_old = tmp_max;
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return (m_read_cache_mid[offset] = mid);
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}
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void c_wave_buffer::clear_data()
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{
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m_head = m_tail = 0;
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memset(m_wave_buf, 0, sizeof(m_wave_buf));
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}
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void c_wave_buffer::reset()
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{
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m_head = m_tail;
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}
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