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added CustomProcInputStream

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svn-id: r13570
This commit is contained in:
Paweł Kołodziejski 2004-04-13 05:57:52 +00:00
parent e42c1f0483
commit 6680c5368d
2 changed files with 53 additions and 0 deletions
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28
sound/audiostream.cpp
View File

@ -336,6 +336,34 @@ public:
};
#endif
CustomProcInputStream::CustomProcInputStream(int rate, byte flags, CustomInputProc proc, void *refCon) {
_refCon = refCon;
_refStream = this;
_rate = rate;
_proc = proc;
_finished = false;
_isStereo = (flags & SoundMixer::FLAG_STEREO) != 0;
_is16Bit = (flags & SoundMixer::FLAG_16BITS) != 0;
_isUnsigned = (flags & SoundMixer::FLAG_UNSIGNED) != 0;
assert(!(flags & SoundMixer::FLAG_LITTLE_ENDIAN));
assert(!(flags & SoundMixer::FLAG_AUTOFREE));
}
int CustomProcInputStream::readBuffer(int16 *buffer, const int numSamples) {
int numBytes = numSamples;
numBytes *= (_is16Bit ? 2 : 1);
byte *tmpBuffer = (byte *)malloc(numBytes);
int gotSamples = (_proc)(_refCon, _refStream, tmpBuffer, numBytes) / (_is16Bit ? 2 : 1);
const byte *ptr = tmpBuffer;
for (int samples = 0; samples < gotSamples; samples++) {
*buffer++ = READSAMPLE(_is16Bit, _isUnsigned, ptr);
ptr += (_is16Bit ? 2 : 1);
}
free(tmpBuffer);
return gotSamples;
}
#pragma mark -
#pragma mark --- Input stream factories ---

25
sound/audiostream.h
View File

@ -113,6 +113,31 @@ public:
int getRate() const { return -1; }
};
class CustomProcInputStream : public AudioStream {
public:
typedef int (*CustomInputProc)(void *refCon, CustomProcInputStream *stream, byte *data, uint len);
private:
bool _isStereo;
bool _is16Bit;
bool _isUnsigned;
int _rate;
CustomInputProc _proc;
CustomProcInputStream *_refStream;
void *_refCon;
bool _finished;
public:
CustomProcInputStream(int rate, byte flags, CustomInputProc proc, void *refCon);
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return _isStereo; }
bool endOfData() const { return _finished; }
void finish() { _finished = true; }
int getRate() const { return _rate; }
};
AudioStream *makeLinearInputStream(int rate, byte _flags, const byte *ptr, uint32 len, uint loopOffset, uint loopLen);
AppendableAudioStream *makeAppendableAudioStream(int rate, byte _flags, uint32 len);