Initial community commit

Src/replicant/decode/svc_decode.h

@@ -0,0 +1,80 @@
+#pragma once
+#include "foundation/dispatch.h"
+#include "audio/parameters.h" 
+#include "audio/ifc_audio_decoder_callback.h"
+#include "audio/ifc_audio_decoder_pull.h"
+#include "nx/nxuri.h"
+
+
+/* if you return NErr_TryAgain, you will be called again with pass=1 after all other services get a chance at the file */
+
+// DA3BB978-4A85-409F-B67C-10E3E1CF73CB
+static const GUID decode_service_type_guid =
+{ 0xDA3BB978, 0x4A85, 0x409F, { 0xB6, 0x7C, 0x10, 0xE3, 0xE1, 0xCF, 0x73, 0xCB } };
+
+class svc_decode : public Wasabi2::Dispatchable
+{
+protected:
+	svc_decode() : Dispatchable(DISPATCHABLE_VERSION) {}
+	~svc_decode() {}
+public:
+	static GUID GetServiceType() { return decode_service_type_guid; }
+
+	/*
+	* return values for the CreateAudioDecoder family of functions
+	* * NErr_Success: Decoder successfully created
+	* * NErr_False: File type not supported by this decoder
+	* * NErr_UnsupportedInterface: File type is supported by this decoder, but not the particular style (callback, pull, packet).
+	* * Any other code is interpreted as an error and enumeration will stop!
+	*/
+
+	/* Flags are defined in ifc_audio_decoder_callback */
+	int CreateAudioDecoder_Callback(ifc_audio_decoder_callback **decoder, nx_uri_t filename, nsaudio::Parameters *parameters, int flags) { return DecodeService_CreateAudioDecoder_Callback(decoder, filename, parameters, flags); }
+	int CreateAudioDecoder_Pull(ifc_audio_decoder_pull **decoder, nx_uri_t filename, nsaudio::Parameters *parameters, int flags) { return DecodeService_CreateAudioDecoder_Pull(decoder, filename, parameters, flags); }
+
+	int CreateAudioDecoder_Callback(unsigned int pass, ifc_audio_decoder_callback **decoder, nx_uri_t filename, nsaudio::Parameters *parameters, int flags)
+	{
+		if (dispatchable_version == 0)
+		{
+			if (pass == 0)
+				return DecodeService_CreateAudioDecoder_Callback(decoder, filename, parameters, flags); 
+			else
+				return NErr_False;
+		}
+		else
+			return DecodeService_CreateAudioDecoder_Callback(pass, decoder, filename, parameters, flags); 
+	}
+
+	int CreateAudioDecoder_Pull(unsigned int pass, ifc_audio_decoder_pull **decoder, nx_uri_t filename, nsaudio::Parameters *parameters, int flags)
+	{
+		if (dispatchable_version == 0)
+		{
+			if (pass == 0)
+				return DecodeService_CreateAudioDecoder_Pull(decoder, filename, parameters, flags); 
+			else
+				return NErr_False;
+		}
+		else
+			return DecodeService_CreateAudioDecoder_Pull(pass, decoder, filename, parameters, flags); 
+	}
+
+	enum
+	{
+		/* Additional flags are defined in the specific decoder interface (e.g. ifc_audio_decoder_pull.h) 
+		They should start at 0x80000001 to ensure uniqueness */
+		FLAG_NO_METADATA= (1 << 0), // tells the decoder that it doesn't need to parse metadata
+		FLAG_VALIDATION = (1 << 1), // turns on codec/file-format specific extra validation checks.  for most implementations this means turning on CRC checking
+	};
+
+	enum
+	{
+		DISPATCHABLE_VERSION=1,
+	};
+private:
+	/* these two no longer have to be implemented */
+	virtual int WASABICALL DecodeService_CreateAudioDecoder_Callback(ifc_audio_decoder_callback **decoder, nx_uri_t filename, nsaudio::Parameters *parameters, int flags) { return DecodeService_CreateAudioDecoder_Callback(0, decoder, filename, parameters, flags); }
+	virtual int WASABICALL DecodeService_CreateAudioDecoder_Pull(ifc_audio_decoder_pull **decoder, nx_uri_t filename, nsaudio::Parameters *parameters, int flags) { return DecodeService_CreateAudioDecoder_Pull(0, decoder, filename, parameters, flags); }
+
+	virtual int WASABICALL DecodeService_CreateAudioDecoder_Callback(unsigned int pass, ifc_audio_decoder_callback **decoder, nx_uri_t filename, nsaudio::Parameters *parameters, int flags) { return NErr_NotImplemented; }
+	virtual int WASABICALL DecodeService_CreateAudioDecoder_Pull(unsigned int pass, ifc_audio_decoder_pull **decoder, nx_uri_t filename, nsaudio::Parameters *parameters, int flags) { return NErr_NotImplemented; }
+};