| 1 | #define MAXOUT (+32767) |
| 2 | #define MINOUT (-32768) |
| 3 | |
| 4 | /* limitter */ |
| 5 | #define Limit(val, max,min) { \ |
| 6 | if ( val > max ) val = max; \ |
| 7 | else if ( val < min ) val = min; \ |
| 8 | } |
| 9 | |
| 10 | |
| 11 | void mix_32_to_16l_stereo(short *dest, int *src, int count) |
| 12 | { |
| 13 | int l, r; |
| 14 | |
| 15 | for (; count > 0; count--) |
| 16 | { |
| 17 | l = r = *dest; |
| 18 | l += *src++; |
| 19 | r += *src++; |
| 20 | Limit( l, MAXOUT, MINOUT ); |
| 21 | Limit( r, MAXOUT, MINOUT ); |
| 22 | *dest++ = l; |
| 23 | *dest++ = r; |
| 24 | } |
| 25 | } |
| 26 | |
| 27 | |
| 28 | void mix_32_to_16_mono(short *dest, int *src, int count) |
| 29 | { |
| 30 | int l; |
| 31 | |
| 32 | for (; count > 0; count--) |
| 33 | { |
| 34 | l = *dest; |
| 35 | l += *src++; |
| 36 | Limit( l, MAXOUT, MINOUT ); |
| 37 | *dest++ = l; |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | |
| 42 | /* unimplemented... */ |
| 43 | void mix_16h_to_32(int *dest_buf, short *mp3_buf, int count) |
| 44 | { |
| 45 | } |
| 46 | |
| 47 | void mix_16h_to_32_s1(int *dest_buf, short *mp3_buf, int count) |
| 48 | { |
| 49 | } |
| 50 | |
| 51 | void mix_16h_to_32_s2(int *dest_buf, short *mp3_buf, int count) |
| 52 | { |
| 53 | } |
| 54 | |