diff options
Diffstat (limited to 'OpenAL32/Include/alu.h')
| -rw-r--r-- | OpenAL32/Include/alu.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/OpenAL32/Include/alu.h b/OpenAL32/Include/alu.h index 31d42ea9..c157a529 100644 --- a/OpenAL32/Include/alu.h +++ b/OpenAL32/Include/alu.h @@ -80,7 +80,20 @@ typedef enum { #define FRACTIONBITS (14) #define FRACTIONONE (1<<FRACTIONBITS) #define FRACTIONMASK (FRACTIONONE-1) -#define MAX_PITCH (INT_MAX & ~FRACTIONMASK) + +/* Size for temporary stack storage of buffer data. Larger values need more + * stack, while smaller values may need more iterations. The value needs to be + * a sensible size, however, as it constrains the max stepping value used for + * mixing. + * The mixer requires being able to do two samplings per mixing loop. A 16KB + * buffer can hold 512 sample frames for a 7.1 float buffer. With the cubic + * resampler (which requires 3 padding sample frames), this limits the maximum + * step to about 508. This means that buffer_freq*source_pitch cannot exceed + * device_freq*508 for an 8-channel 32-bit buffer. */ +#ifndef STACK_DATA_SIZE +#define STACK_DATA_SIZE 16384 +#endif + /* NOTE: The AL_FORMAT_REAR* enums aren't handled here because they're * converted to AL_FORMAT_QUAD* when loaded */ |