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68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
#ifndef _clHCA_H
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#define _clHCA_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum { clHCA_samplesPerBlock = 0x80 * 8 };
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/* Must pass at least 8 bytes of data to this function. Returns -1 on non-match, or
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* positive byte count on success. */
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int clHCA_isOurFile0(const void *data);
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/* Must pass a full header block for success. Returns 0 on success, -1 on failure. */
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int clHCA_isOurFile1(const void *data, unsigned int size);
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/* The opaque state structure. */
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typedef struct clHCA clHCA;
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/* In case you wish to allocate the structure on your own. */
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int clHCA_sizeof();
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void clHCA_clear(clHCA *, unsigned int ciphKey1, unsigned int ciphKey2);
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void clHCA_done(clHCA *);
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/* Or you could let the library allocate it. */
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clHCA * clHCA_new(unsigned int ciphKey1, unsigned int ciphKey2);
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void clHCA_delete(clHCA *);
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/* Requires a pre-allocated data structure.
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* Before any decoding may be performed, the header block must be passed in.
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* The recommended way of doing this is to detect the header length with
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* clHCA_isOurFile0, validate the header with clHCA_isOurFile1, then pass
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* it to this function, with the address of 0.
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* Subsequent decodes with non-zero address are assumed to be sample blocks,
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* and should be of the blockSize returned by the clHCA_getInfo function.
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* Returns 0 on success, -1 on failure. */
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int clHCA_Decode(clHCA *, void *data, unsigned int size, unsigned int address);
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/* This is the simplest decode function, for signed and clipped 16 bit samples.
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* May be called after clHCA_Decode, and will return the same data until the next
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* block of sample data is passed to clHCA_Decode. */
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void clHCA_DecodeSamples16(clHCA *, signed short * outSamples);
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typedef struct clHCA_stInfo {
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unsigned int version;
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unsigned int dataOffset;
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unsigned int samplingRate;
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unsigned int channelCount;
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unsigned int blockSize;
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unsigned int blockCount;
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unsigned int loopEnabled;
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unsigned int loopStart;
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unsigned int loopEnd;
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const char *comment;
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} clHCA_stInfo;
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/* Retrieve information relevant for decoding and playback with this function.
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* Must be called after successfully decoding a header block with clHCA_Decode,
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* or else it will fail.
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* Returns 0 on success, -1 on failure. */
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int clHCA_getInfo(clHCA *, clHCA_stInfo *out);
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#ifdef __cplusplus
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}
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#endif
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#endif
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