| 88,6 → 88,25 |
|---|
| /* The actual storage of a decoded sample is separated in the following macros. |
| We can handle different types, we could also handle dithering here. */ |
| |
| #ifdef NEWOLD_WRITE_SAMPLE |
| |
| /* This is the old new mpg123 WRITE_SAMPLE, fixed for newer GCC by MPlayer folks. |
| Makes a huge difference on old machines. */ |
| #if WORDS_BIGENDIAN |
| #define MANTISSA_OFFSET 1 |
| #else |
| #define MANTISSA_OFFSET 0 |
| #endif |
| #define WRITE_SHORT_SAMPLE(samples,sum,clip) { \ |
| union { double dtemp; int itemp[2]; } u; int v; \ |
| u.dtemp = ((((65536.0 * 65536.0 * 16)+(65536.0 * 0.5))* 65536.0)) + (sum);\ |
| v = u.itemp[MANTISSA_OFFSET] - 0x80000000; \ |
| if( v > 32767) { *(samples) = 0x7fff; (clip)++; } \ |
| else if( v < -32768) { *(samples) = -0x8000; (clip)++; } \ |
| else { *(samples) = v; } \ |
| } |
| |
| #else |
| /* Macro to produce a short (signed 16bit) output sample from internal representation, |
| which may be float, double or indeed some integer for fixed point handling. */ |
| #define WRITE_SHORT_SAMPLE(samples,sum,clip) \ |
| 94,6 → 113,7 |
|---|
| if( (sum) > REAL_PLUS_32767) { *(samples) = 0x7fff; (clip)++; } \ |
| else if( (sum) < REAL_MINUS_32768) { *(samples) = -0x8000; (clip)++; } \ |
| else { *(samples) = REAL_TO_SHORT(sum); } |
| #endif |
| |
| /* Same as above, but always using accurate rounding. Would we want softer clipping here, too? */ |
| #define WRITE_SHORT_SAMPLE_ACCURATE(samples,sum,clip) \ |