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4
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1 /*
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2 File: STREAM.C
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3
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4 Description:
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5 Streaming Audio module for MikMod.
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6
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7 Portability:
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8 All compilers - All systems
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9
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10 */
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11
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12
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13 #include "mikmod.h"
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14
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15
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16 int stream_bufsize = 100; // in 1/100th seconds
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17
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18 static BOOL is_streaming = 0;
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19 static MSTREAM *firststream = NULL;
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20
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21 static BOOL active;
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22
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23 FILE *stream_fp;
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24 SLONG stream_seekpos;
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25 SLONG stream_reppos;
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26
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27 void MikMod_RegisterStream(MSTREAM *stream)
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28 {
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29 MSTREAM *cruise = firststream;
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30
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31 if(cruise!=NULL)
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32 { while(cruise->next!=NULL) cruise = cruise->next;
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33 cruise->next = stream;
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34 } else
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35 firststream = stream;
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36 }
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37
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38
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39 BOOL Stream_PlayFN(CHAR *filename)
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40 {
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41 return 0;
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42 }
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43
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44
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45 BOOL Stream_PlayFP(FILE *fp)
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46 {
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47 BOOL ok;
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48 MSTREAM *l;
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49
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50 stream_fp = fp;
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51 _mm_errno = 0;
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52 _mm_critical = 0;
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53
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54 _mm_iobase_setcur(stream_fp);
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55
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56 // Try to find a loader that recognizes the stream
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57
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58 for(l=firststream; l!=NULL; l=l->next)
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59 { _mm_rewind(stream_fp);
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60 if(l->Test()) break;
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61 }
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62
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63 if(l==NULL)
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64 { _mm_errno = MMERR_NOT_A_STREAM;
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65 if(_mm_errorhandler!=NULL) _mm_errorhandler();
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66 _mm_iobase_revert();
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67 return 1;
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68 }
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69
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70 // init stream loader and load the header
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71 if(l->Init())
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72 { _mm_rewind(stream_fp);
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73 ok = l->Load();
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74 }
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75
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76 // free loader allocations
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77 l->Cleanup();
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78
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79 if(!ok)
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80 { _mm_iobase_revert();
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81 return 1;
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82 }
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83
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84 //loadbuf = _mm_malloc(8192);
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85
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86 _mm_iobase_revert();
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87 active = 1;
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88 return 0;
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89 }
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90
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91
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92 BOOL Stream_Init(ULONG speed, UWORD flags)
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93
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94 // size = size of buffer in 1/100th seconds
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95
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96 {
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97 if(is_streaming) md_driver->StreamExit();
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98 if(md_driver->StreamInit(speed,flags)) return 1;
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99 is_streaming = 1;
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100
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101 return 0;
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102 }
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103
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104
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105 void Stream_Exit(void)
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106 {
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107 if(is_streaming) md_driver->StreamExit();
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108 is_streaming = 0;
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109 }
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110
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111
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112 static ULONG last = 0;
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113
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114 void Stream_Update(void)
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115 {
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116 ULONG curr;
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117 ULONG todo;
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118
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119 curr = md_driver->StreamGetPosition();
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120 if(curr==last) return;
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121
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122 if(curr>last)
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123 { todo = curr-last;
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124 //SL_LoadStream(,vstream.infmt,vstream.flags,todo,stream_fp);
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125 last += todo;
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126 //if(last>=vstream.size) last = 0;
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127 } else
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128 { //todo = vstream.size-last;
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129 //SL_LoadStream(&vstream.buffer[last],vstream.infmt,vstream.flags,todo,stream_fp);
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130 //SL_LoadStream(vstream.buffer,vstream.infmt,vstream.flags,curr,stream_fp);
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131 last = curr;
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132 }
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133 }
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134
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