Initial community commit

Src/Plugins/Input/in_avi/ifc_aviaudiodecoder.h

@@ -0,0 +1,67 @@
+#pragma once
+#include <bfc/dispatch.h>
+
+class NOVTABLE ifc_aviaudiodecoder : public Dispatchable
+{
+protected:
+	ifc_aviaudiodecoder() {}
+	~ifc_aviaudiodecoder() {}
+public:
+	enum
+	{
+		AVI_SUCCESS = 0,
+		AVI_NEED_MORE_INPUT = -1,
+		AVI_FAILURE=1,
+		AVI_RESYNC=2,
+	};
+	int OutputFrameSize(uint32_t *frame_size);
+	int GetOutputProperties(unsigned int *sampleRate, unsigned int *channels, unsigned int *bitsPerSample, bool *isFloat); // can return an error code for "havn't locked to stream yet"
+	// many AVI files arbitrarily divide the data stream (e.g. an MP3 frame might span two chunks).  Others put ALL the audio into ONE chunk. awesome.
+	// for this reason, you are given double pointers to the data buffer and a pointer to the data size
+	// and you are expected to update it on return
+	// if inputBufferBytes != 0, you will be called again with the same data (return AVI_SUCCESS, though)
+	// if you were unable to decode because of bitstream errors, return AVI_RESYNC so in_avi can try to correct timing
+	int DecodeChunk(uint16_t type, const void **inputBuffer, uint32_t *inputBufferBytes, void *outputBuffer, uint32_t *outputBufferBytes);
+	void Flush();
+	void Close(); // self-destructs
+	void EndOfStream(); // no more input, output anything you have buffered
+	DISPATCH_CODES
+	{
+		OUTPUT_FRAME_SIZE = 0,
+			GET_OUTPUT_PROPERTIES = 1,
+			DECODE_CHUNK = 2,
+			FLUSH = 3,
+			CLOSE = 4,
+			END_OF_STREAM = 5,
+	};
+};
+
+inline int ifc_aviaudiodecoder::OutputFrameSize(uint32_t *frame_size)
+{
+	return _call(OUTPUT_FRAME_SIZE, (int)AVI_FAILURE, frame_size);
+}
+
+inline int ifc_aviaudiodecoder::GetOutputProperties(unsigned int *sampleRate, unsigned int *channels, unsigned int *bitsPerSample, bool *isFloat)
+{
+	return _call(GET_OUTPUT_PROPERTIES, (int)AVI_FAILURE, sampleRate, channels, bitsPerSample, isFloat);
+}
+
+inline int ifc_aviaudiodecoder::DecodeChunk(uint16_t type, const void **inputBuffer, uint32_t *inputBufferBytes, void *outputBuffer, uint32_t *outputBufferBytes)
+{
+	return _call(DECODE_CHUNK, (int)AVI_FAILURE, type, inputBuffer, inputBufferBytes, outputBuffer, outputBufferBytes);
+}
+
+inline void ifc_aviaudiodecoder::Flush()
+{
+	_voidcall(FLUSH);
+}
+
+inline void ifc_aviaudiodecoder::Close()
+{
+	_voidcall(CLOSE);
+}
+
+inline void ifc_aviaudiodecoder::EndOfStream()
+{
+	_voidcall(END_OF_STREAM);
+}