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Fixed Ryan's naughty coding. :)
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@slouken
slouken committed Feb 21, 2003
1 parent e162ebb commit b61167d
Showing 1 changed file with 40 additions and 58 deletions.
98 changes: 40 additions & 58 deletions effect_position.c
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Expand Up @@ -99,16 +99,19 @@ static void _Eff_position_u8(int chan, void *stream, int len, void *udata)
* 1.0, and are therefore throwaways.
*/
if (len % sizeof (Uint16) != 0) {
*(ptr++) = (Uint8) (((float) *ptr) * args->distance_f);
*ptr = (Uint8) (((float) *ptr) * args->distance_f);
ptr++;
len--;
}

for (i = 0; i < len; i += sizeof (Uint8) * 2) {
/* must adjust the sample so that 0 is the center */
*(ptr++) = (Uint8) ((Sint8) ((((float) (Sint8) (*ptr - 128))
*ptr = (Uint8) ((Sint8) ((((float) (Sint8) (*ptr - 128))
* args->left_f) * args->distance_f) + 128);
*(ptr++) = (Uint8) ((Sint8) ((((float) (Sint8) (*ptr - 128))
ptr++;
*ptr = (Uint8) ((Sint8) ((((float) (Sint8) (*ptr - 128))
* args->right_f) * args->distance_f) + 128);
ptr++;
}
}

Expand Down Expand Up @@ -137,9 +140,12 @@ static void _Eff_position_table_u8(int chan, void *stream, int len, void *udata)
* be sure not to overrun the audio buffer...
*/
while (len % sizeof (Uint32) != 0) {
*(ptr++) = d[l[*ptr]];
if (args->channels == 2)
*(ptr++) = d[r[*ptr]];
*ptr = d[l[*ptr]];
ptr++;
if (args->channels > 1) {
*ptr = d[r[*ptr]];
ptr++;
}
len -= args->channels;
}

Expand Down Expand Up @@ -173,13 +179,16 @@ static void _Eff_position_s8(int chan, void *stream, int len, void *udata)
* 1.0, and are therefore throwaways.
*/
if (len % sizeof (Sint16) != 0) {
*(ptr++) = (Sint8) (((float) *ptr) * args->distance_f);
*ptr = (Sint8) (((float) *ptr) * args->distance_f);
ptr++;
len--;
}

for (i = 0; i < len; i += sizeof (Sint8) * 2) {
*(ptr++) = (Sint8)((((float) *ptr) * args->left_f) * args->distance_f);
*(ptr++) = (Sint8)((((float) *ptr) * args->right_f) * args->distance_f);
*ptr = (Sint8)((((float) *ptr) * args->left_f) * args->distance_f);
ptr++;
*ptr = (Sint8)((((float) *ptr) * args->right_f) * args->distance_f);
ptr++;
}
}

Expand All @@ -204,9 +213,12 @@ static void _Eff_position_table_s8(int chan, void *stream, int len, void *udata)


while (len % sizeof (Uint32) != 0) {
*(ptr++) = d[l[*ptr]];
if (args->channels > 1)
*(ptr++) = d[r[*ptr]];
*ptr = d[l[*ptr]];
ptr++;
if (args->channels > 1) {
*ptr = d[r[*ptr]];
ptr++;
}
len -= args->channels;
}

Expand Down Expand Up @@ -239,26 +251,16 @@ static void _Eff_position_u16lsb(int chan, void *stream, int len, void *udata)
int i;

for (i = 0; i < len; i += sizeof (Uint16) * 2) {
#if (SDL_BYTEORDER == SDL_BIG_ENDIAN)
Sint16 sampl = (Sint16) (SDL_Swap16(*(ptr+0)) - 32768);
Sint16 sampr = (Sint16) (SDL_Swap16(*(ptr+1)) - 32768);
Sint16 sampl = (Sint16) (SDL_SwapLE16(*(ptr+0)) - 32768);
Sint16 sampr = (Sint16) (SDL_SwapLE16(*(ptr+1)) - 32768);

Uint16 swapl = (Uint16) ((Sint16) (((float) sampl * args->left_f)
* args->distance_f) + 32768);
Uint16 swapr = (Uint16) ((Sint16) (((float) sampr * args->right_f)
* args->distance_f) + 32768);

*(ptr++) = (Uint16) SDL_Swap16(swapl);
*(ptr++) = (Uint16) SDL_Swap16(swapr);
#else
Sint16 sampl = (Sint16) (*(ptr+0) - 32768);
Sint16 sampr = (Sint16) (*(ptr+1) - 32768);

*(ptr++) = (Uint16) ((Sint16) (((float) sampl * args->left_f)
* args->distance_f) + 32768);
*(ptr++) = (Uint16) ((Sint16) (((float) sampr * args->right_f)
* args->distance_f) + 32768);
#endif
*(ptr++) = (Uint16) SDL_SwapLE16(swapl);
*(ptr++) = (Uint16) SDL_SwapLE16(swapr);
}
}

Expand All @@ -270,17 +272,12 @@ static void _Eff_position_s16lsb(int chan, void *stream, int len, void *udata)
int i;

for (i = 0; i < len; i += sizeof (Sint16) * 2) {
#if (SDL_BYTEORDER == SDL_BIG_ENDIAN)
Sint16 swapl = (Sint16) ((((float) SDL_Swap16(*(ptr))) *
Sint16 swapl = (Sint16) ((((float) SDL_SwapLE16(*(ptr+0))) *
args->left_f) * args->distance_f);
Sint16 swapr = (Sint16) ((((float) SDL_Swap16(*(ptr+1))) *
Sint16 swapr = (Sint16) ((((float) SDL_SwapLE16(*(ptr+1))) *
args->right_f) * args->distance_f);
*(ptr++) = (Sint16) SDL_Swap16(swapl);
*(ptr++) = (Sint16) SDL_Swap16(swapr);
#else
*(ptr++) = (Sint16) ((((float) *ptr)*args->left_f)*args->distance_f);
*(ptr++) = (Sint16) ((((float) *ptr)*args->right_f)*args->distance_f);
#endif
*(ptr++) = (Sint16) SDL_SwapLE16(swapl);
*(ptr++) = (Sint16) SDL_SwapLE16(swapr);
}
}

Expand All @@ -292,26 +289,16 @@ static void _Eff_position_u16msb(int chan, void *stream, int len, void *udata)
int i;

for (i = 0; i < len; i += sizeof (Sint16) * 2) {
#if (SDL_BYTEORDER == SDL_LIL_ENDIAN)
Sint16 sampl = (Sint16) (SDL_Swap16(*(ptr+0)) - 32768);
Sint16 sampr = (Sint16) (SDL_Swap16(*(ptr+1)) - 32768);
Sint16 sampl = (Sint16) (SDL_SwapBE16(*(ptr+0)) - 32768);
Sint16 sampr = (Sint16) (SDL_SwapBE16(*(ptr+1)) - 32768);

Uint16 swapl = (Uint16) ((Sint16) (((float) sampl * args->left_f)
* args->distance_f) + 32768);
Uint16 swapr = (Uint16) ((Sint16) (((float) sampr * args->right_f)
* args->distance_f) + 32768);

*(ptr++) = (Uint16) SDL_Swap16(swapl);
*(ptr++) = (Uint16) SDL_Swap16(swapr);
#else
Sint16 sampl = (Sint16) (*(ptr+0) - 32768);
Sint16 sampr = (Sint16) (*(ptr+1) - 32768);

*(ptr++) = (Uint16) ((Sint16) (((float) sampl * args->left_f)
* args->distance_f) + 32768);
*(ptr++) = (Uint16) ((Sint16) (((float) sampr * args->right_f)
* args->distance_f) + 32768);
#endif
*(ptr++) = (Uint16) SDL_SwapBE16(swapl);
*(ptr++) = (Uint16) SDL_SwapBE16(swapr);
}
}

Expand All @@ -323,17 +310,12 @@ static void _Eff_position_s16msb(int chan, void *stream, int len, void *udata)
int i;

for (i = 0; i < len; i += sizeof (Sint16) * 2) {
#if (SDL_BYTEORDER == SDL_LIL_ENDIAN)
Sint16 swapl = (Sint16) ((((float) SDL_Swap16(*(ptr))) *
Sint16 swapl = (Sint16) ((((float) SDL_SwapBE16(*(ptr+0))) *
args->left_f) * args->distance_f);
Sint16 swapr = (Sint16) ((((float) SDL_Swap16(*(ptr+1))) *
Sint16 swapr = (Sint16) ((((float) SDL_SwapBE16(*(ptr+1))) *
args->right_f) * args->distance_f);
*(ptr++) = (Sint16) SDL_Swap16(swapl);
*(ptr++) = (Sint16) SDL_Swap16(swapr);
#else
*(ptr++) = (Sint16) ((((float) *ptr)*args->left_f)*args->distance_f);
*(ptr++) = (Sint16) ((((float) *ptr)*args->right_f)*args->distance_f);
#endif
*(ptr++) = (Sint16) SDL_SwapBE16(swapl);
*(ptr++) = (Sint16) SDL_SwapBE16(swapr);
}
}

Expand Down

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