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comparison alt_audio_convert.h @ 373:24a610dfbbfd

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More altcvt updates from Frank.
author Ryan C. Gordon <icculus@icculus.org>
date Sat, 29 Jun 2002 04:08:17 +0000
parents 1b463ef9bcc2
children 44ed8bdeba74
comparison
equal deleted inserted replaced
372:ee0678efd4a3 373:24a610dfbbfd
36 typedef struct{ 36 typedef struct{
37 Sint16 c[16][4*_fsize]; 37 Sint16 c[16][4*_fsize];
38 Uint8 incr[16]; 38 Uint8 incr[16];
39 int denominator; 39 int denominator;
40 int numerator; 40 int numerator;
41 Uint32 zero;
42 int mask;
41 } VarFilter; 43 } VarFilter;
42 44
43 typedef struct{ 45 typedef struct{
44 Uint8* buffer; 46 Uint8* buffer;
45 int mode; 47 int mode;
46 VarFilter *filter; 48 VarFilter *filter;
47 } AdapterC; 49 } AdapterC;
48 50
49 /*
50 typedef struct{ 51 typedef struct{
51 VarFilter filter; 52 VarFilter filter;
52 double mult; // buffer must be len*buf_mult big 53 int (*adapter[32]) ( AdapterC Data, int length );
53 int add; 54 /* buffer must be len*len_mult(+len_add) big */
54 int (*adapter[32]) ( AdapterC Data, int length ); 55 int len_mult;
55 } SDL_AudioC; 56 int len_add;
57 double add;
56 58
57 */ 59 /* the following elements are provided for compatibility: */
58 60 /* the size of the output is approx len*len_ratio */
59 /* the len_* variables and the needed variable are not used internally, 61 double len_ratio;
60 they are provided for compatibility */ 62 Uint8* buf; /* input/output buffer */
61 63 int needed; /* 0 if nothing to be done, 1 otherwise */
62 typedef struct{ 64 int len; /* Length of the input */
63 int needed;
64 VarFilter filter;
65 Uint8* buf;
66 int len; /* Length of original audio buffer */
67 int len_cvt; /* Length of converted audio buffer */ 65 int len_cvt; /* Length of converted audio buffer */
68 int len_mult; /* buffer must be len*len_mult big */
69 double len_ratio; /* Given len, final size is len*len_ratio */
70
71 double add;
72 double mult;
73 int (*adapter[32]) ( AdapterC Data, int length );
74 } Sound_AudioCVT; 66 } Sound_AudioCVT;
75 67
76 #define SDL_AI_Loop 0x01 68 #define SDL_SOUND_Loop 0x10
77 69
78 extern DECLSPEC int Sound_ConvertAudio( Sound_AudioCVT *Data ); 70 extern DECLSPEC int Sound_ConvertAudio( Sound_AudioCVT *Data );
79 71
80 extern DECLSPEC int Sound_BuildAudioCVT( Sound_AudioCVT *Data, 72 extern DECLSPEC int Sound_BuildAudioCVT( Sound_AudioCVT *Data,
81 Uint16 src_format, Uint8 src_channels, int src_rate, 73 Uint16 src_format, Uint8 src_channels, int src_rate,
82 Uint16 dst_format, Uint8 dst_channels, int dst_rate ); 74 Uint16 dst_format, Uint8 dst_channels, int dst_rate, Uint32 dst_size );
83 75
84 #endif /* _INCLUDE_AUDIO_CONVERT_H_ */ 76 #endif /* _INCLUDE_AUDIO_CONVERT_H_ */
85 77