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1 #include "StdAfx.h"
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2
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3 #include "dynamic_bitrate_helper.h"
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4 #include <SDK/config_object.h>
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5
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6 static unsigned g_query_settings()
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7 {
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8 t_int32 temp;
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9 try {
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10 config_object::g_get_data_int32(standard_config_objects::int32_dynamic_bitrate_display_rate,temp);
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11 } catch(std::exception const &) {return 9;}
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12 if (temp < 0) return 0;
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13 return (unsigned) temp;
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14 }
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15
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16 dynamic_bitrate_helper::dynamic_bitrate_helper()
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17 {
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18 reset();
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19 }
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20
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21 void dynamic_bitrate_helper::init()
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22 {
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23 if (!m_inited)
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24 {
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25 m_inited = true;
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26 unsigned temp = g_query_settings();
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27 if (temp > 0) {m_enabled = true; m_update_interval = 1.0 / (double) temp; }
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28 else {m_enabled = false; m_update_interval = 0; }
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29 m_last_duration = 0;
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30 m_update_bits = 0;
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31 m_update_time = 0;
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32
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33 }
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34 }
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35
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36 void dynamic_bitrate_helper::on_frame(double p_duration,t_size p_bits)
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37 {
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38 init();
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39 m_last_duration = p_duration;
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40 m_update_time += p_duration;
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41 m_update_bits += p_bits;
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42 }
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43
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44 bool dynamic_bitrate_helper::on_update(file_info & p_out, double & p_timestamp_delta)
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45 {
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46 init();
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47
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48 bool ret = false;
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49 if (m_enabled)
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50 {
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51 if (m_update_time > m_update_interval)
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52 {
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53 int val = (int) ( ((double)m_update_bits / m_update_time + 500.0) / 1000.0 );
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54 if (val != p_out.info_get_bitrate_vbr())
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55 {
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56 p_timestamp_delta = - (m_update_time - m_last_duration); //relative to last frame beginning;
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57 p_out.info_set_bitrate_vbr(val);
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58 ret = true;
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59 }
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60 m_update_bits = 0;
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61 m_update_time = 0;
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62 }
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63 }
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64 else
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65 {
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66 m_update_bits = 0;
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67 m_update_time = 0;
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68 }
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69
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70 return ret;
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71
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72 }
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73
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74 void dynamic_bitrate_helper::reset()
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75 {
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76 m_inited = false;
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77 }
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