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-
- /*
- * utilsound.h
- * Copyright 1988-89 NeXT, Inc.
- *
- */
-
- #import "soundstruct.h"
- #import "sounderror.h"
-
- int SNDSampleCount(SNDSoundStruct *s);
- /*
- * Returns the number of sample frames in the sound. If the format is not
- * recognized, or the sample count cannot be determined, then -1 is
- * returned.
- */
-
- int SNDGetDataPointer(SNDSoundStruct *s, char **ptr, int *size, int *width);
- /*
- * Return a pointer to the data portion of a soundstruct in ptr, the
- * number of samples (NOT sample frames) in size, and the number of bytes per
- * sample in width. Fragmented sounds return an error.
- * Returns an error code.
- */
-
- int SNDBytesToSamples(int byteCount, int channelCount, int dataFormat);
- int SNDSamplesToBytes(int sampleCount, int channelCount, int dataFormat);
- /*
- * Converts bytes to samples and the converse, given also the channelCount
- * and dataFormat. If the dataFormat is not recognized, then a negative value
- * is returned.
- * The number returned from SNDSamplesToBytes is useful as the "dataSize"
- * argument to SNDAlloc.
- */
-
- int SNDAlloc(SNDSoundStruct **s,
- int dataSize,
- int dataFormat,
- int samplingRate,
- int channelCount,
- int infoSize);
- /*
- * Allocate a sound structure and initialize its fields. The actual sample
- * data is uninitialized, and the info string buffer is extended to the
- * smallest quad boundary greater than zero. Both the dataSize and infoSize
- * are expressed in bytes. An error code is returned.
- * If no error, then a pointer to the allocated data is returned in "s".
- */
-
- int SNDFree(SNDSoundStruct *s);
- /*
- * Frees "s", which was created and returned by one of the sound library
- * routines.
- */
-
- int SNDPlaySoundfile(char *path, int priority);
- /*
- * Play the soundfile specified by path. Playback occurs in the background,
- * and this routine returns immediately. Playback interrupts any currently
- * playing sound of the same or lower priority. When playback completes,
- * the storage allocated by this function is automatically deallocated.
- * An error code is returned.
- */
-
- /* New for 3.1 */
- int SNDSwapHostToSound(void *dest, void *src, int sampleCount,
- int channelCount, int dataFormat);
- int SNDSwapSoundToHost(void *dest, void *src, int sampleCount,
- int channelCount, int dataFormat);
-