Initial community commit

Src/Agave/DecodeFile/ifc_audiostream.h

@@ -0,0 +1,65 @@
+#ifndef NULLSOFT_AGAVE_IFC_AUDIOSTREAM_H
+#define NULLSOFT_AGAVE_IFC_AUDIOSTREAM_H
+
+#include <bfc/dispatch.h>
+
+class ifc_audiostream : public Dispatchable
+{
+protected:
+	ifc_audiostream() {}
+	~ifc_audiostream() {}
+public:
+	/* returns number of bytes written to buffer.
+	 * a return value of 0 means EOF
+	 */
+	size_t ReadAudio(void *buffer, size_t sizeBytes); 
+
+	size_t ReadAudio(void *buffer, size_t, int *killswitch, int *errorCode);
+	/* Seeks to a point in the stream in milliseconds
+	 * returns TRUE if successful, FALSE otherwise
+	 */
+	int SeekToTimeMs(int millisecs);
+
+	/* returns 1 if this stream is seekable using SeekToTime, 0 otherwise
+	*/
+	int CanSeek();
+public:
+	DISPATCH_CODES
+	{
+	    IFC_AUDIOSTREAM_READAUDIO = 10,
+			IFC_AUDIOSTREAM_READAUDIO2 = 11,
+			IFC_AUDIOSTREAM_SEEKTOTIMEMS = 20,
+			IFC_AUDIOSTREAM_CANSEEK = 30,
+	};
+};
+
+inline size_t ifc_audiostream::ReadAudio(void *buffer, size_t sizeBytes)
+{
+	return _call(IFC_AUDIOSTREAM_READAUDIO, (size_t)0, buffer, sizeBytes);
+}
+
+inline size_t ifc_audiostream::ReadAudio(void *buffer, size_t sizeBytes, int *killswitch, int *errorCode)
+{
+	void *params[4] = { &buffer, &sizeBytes, &killswitch, &errorCode};
+	size_t retval;
+
+	if (_dispatch(IFC_AUDIOSTREAM_READAUDIO2, &retval, params, 4))
+		return retval;
+	else
+	{
+		*errorCode=0;
+		return ReadAudio(buffer, sizeBytes);
+	}	
+}
+
+inline int ifc_audiostream::SeekToTimeMs(int millisecs)
+{
+	return _call(IFC_AUDIOSTREAM_SEEKTOTIMEMS, (int)0, millisecs);
+}
+
+inline int ifc_audiostream::CanSeek()
+{
+	return _call(IFC_AUDIOSTREAM_CANSEEK, (int)0);
+}
+
+#endif