tetrees/Plugins/Wwise/ThirdParty/include/AK/Wwise/Plugin/MediaConverter.h

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released in source code form as part of the SDK installer package.

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  Copyright (c) 2023 Audiokinetic Inc.
*******************************************************************************/

/**
 * \brief Wwise Authoring Plug-ins - API to convert used object medias to a
 *        format usable by the plug-in's Sound Engine part.
 * \file AK/Wwise/Plugin/MediaConverter.h
 */

#pragma once

#include "PluginInfoGenerator.h"

/**
 * \brief API to convert used object medias to a format usable by the plug-in's Sound Engine part.
 */
struct ak_wwise_plugin_media_converter_v1
#ifdef __cplusplus
	: public ak_wwise_plugin_base_interface
#endif
{
#ifndef __cplusplus
	ak_wwise_plugin_base_interface m_baseInterface;
#endif

#ifdef __cplusplus
	/// Base instance type for providing custom media conversion.
	using Instance = ak_wwise_plugin_media_converter_instance_v1;

	ak_wwise_plugin_media_converter_v1() :
		ak_wwise_plugin_base_interface(AK_WWISE_PLUGIN_INTERFACE_TYPE_MEDIA_CONVERTER, 1)
	{}
#endif

	/**
	 * \brief Converts a file.
	 * 
	 * \aknote If the conversion failed the function is responsible for deleting any files that may have been
	 *         created, even the destination file in case of error. If the function returns false we will use the
	 *         string put in io_pError to display an error message.
	 * 
	 * \param[in] in_this Current instance of this interface.
	 * \param[in] in_guidPlatform The unique ID of the custom platform being converted for.
	 * \param[in] in_basePlatform The unique ID of the base platform being converted for.
	 * \param[in] in_szSourceFile Source File to convert data from.
	 * \param[in] in_szDestFile Destination File, must be created by the plug-in.
	 * \param[in] in_uSampleRate The target sample rate for the converted file, passing 0 will default to
	 *            the platform default.
	 * \param[in] in_uBlockLength The block length, passing 0 will default to the platform default.
	 * \param[in] in_pProgress Optional Progress Bar controller.
	 * \param io_pError Optional error string that can be displayed if ConversionResult is not successful.
	 * \result Whether the conversion was successful or not.
	 */
	AK::Wwise::Plugin::ConversionResult(*ConvertFile)(
		const struct ak_wwise_plugin_media_converter_instance_v1* in_this,
		const GUID* in_guidPlatform,
		const BasePlatformID* in_basePlatform,
		const AkOSChar * in_szSourceFile,
		const AkOSChar * in_szDestFile,
		AkUInt32 in_uSampleRate,
		AkUInt32 in_uBlockLength,
		AK::Wwise::Plugin::IProgress* in_pProgress,
		AK::Wwise::Plugin::IWriteString* io_pError
	);

	/**
	 * \brief Calculates the conversion setting's hash.
	 * 
	 * The goal of this function is to return a value that can be used to indicate whether the plug-in information changed
	 * between two conversion requests. Each time a SoundBank generation is done, that value is stored, and if it's
	 * different from the previous one, or if the file changed, a new ConvertFile will be called.
	 * 
	 * \param[in] in_this Current instance of this interface.
	 * \param[in] in_guidPlatform The unique ID of the custom platform for which the conversion is being done.
	 * \param[in] in_uSampleRate The target sample rate for the converted file, passing 0 will default to
	 *            the platform default.
	 * \param[in] in_uBlockLength The block length, passing 0 will default to the platform default.
	 * \return A hash value for all the plug-in parameters.
	 */
	uint32_t(*GetCurrentConversionSettingsHash)(
		const struct ak_wwise_plugin_media_converter_instance_v1* in_this,
		const GUID* in_guidPlatform,
		AkUInt32 in_uSampleRate,
		AkUInt32 in_uBlockLength
	);
};
#define AK_WWISE_PLUGIN_MEDIA_CONVERTER_V1_ID() \
	AK_WWISE_PLUGIN_BASE_INTERFACE_FROM_ID(AK_WWISE_PLUGIN_INTERFACE_TYPE_MEDIA_CONVERTER, 1)
#define AK_WWISE_PLUGIN_MEDIA_CONVERTER_V1_CTOR(/* ak_wwise_plugin_info* */ in_pluginInfo, /* void* */ in_data) \
{ \
	.m_baseInterface = AK_WWISE_PLUGIN_BASE_INTERFACE_CTOR(AK_WWISE_PLUGIN_MEDIA_CONVERTER_V1_ID(), in_pluginInfo, in_data) \
}


#ifdef __cplusplus
namespace AK::Wwise::Plugin
{
	namespace V1
	{
		using CMediaConverter = ak_wwise_plugin_media_converter_v1;
		class MediaConverter : public CMediaConverter::Instance
		{
		public:
			/**
			 * \brief The interface type, as provided by this plug-in.
			 */
			enum : InterfaceTypeValue
			{
				/**
				 * \brief The interface type, as provided by this plug-in.
				 */
				k_interfaceType = AK_WWISE_PLUGIN_INTERFACE_TYPE_MEDIA_CONVERTER
			};
			/**
			 * \brief The interface version, as provided by this plug-in.
			 */
			enum : InterfaceVersion
			{
				/**
				 * \brief The interface version, as provided by this plug-in.
				 */
				k_interfaceVersion = 1
			};

			/**
			 * \brief The C interface, fulfilled by your plug-in.
			 */
			struct Interface : public CMediaConverter
			{
				using Instance = MediaConverter;
				Interface()
				{
					CMediaConverter::ConvertFile = [](const struct ak_wwise_plugin_media_converter_instance_v1* in_this, const GUID* in_guidPlatform, const BasePlatformID* in_basePlatform, const AkOSChar * in_szSourceFile, const AkOSChar * in_szDestFile, AkUInt32 in_uSampleRate, AkUInt32 in_uBlockLength, IProgress* in_pProgress, IWriteString* io_pError)
					{ return (ConversionResult)static_cast<const Instance*>(in_this)->ConvertFile(*in_guidPlatform, *in_basePlatform, in_szSourceFile, in_szDestFile, in_uSampleRate, in_uBlockLength, in_pProgress, io_pError); };
					CMediaConverter::GetCurrentConversionSettingsHash = [](const struct ak_wwise_plugin_media_converter_instance_v1* in_this, const GUID* in_guidPlatform, AkUInt32 in_uSampleRate, AkUInt32 in_uBlockLength)
					{ return (uint32_t)static_cast<const Instance*>(in_this)->GetCurrentConversionSettingsHash(*in_guidPlatform, in_uSampleRate, in_uBlockLength); };
				}
			};

			InterfacePtr GetInterfacePointer() {
				static Interface g_interface;
				return &g_interface;
			}
			CMediaConverter::Instance* GetInstancePointer() {
				return this;
			}
			const CMediaConverter::Instance* GetInstancePointer() const {
				return this;
			}

			MediaConverter() :
				CMediaConverter::Instance()
			{
			}

			virtual ~MediaConverter() {}

			/**
			 * \brief Converts a file.
			 * 
			 * \aknote If the conversion failed the function is responsible for deleting any files that may have been
			 *         created, even the destination file in case of error. If the function returns false we will use the
			 *         string put in io_pError to display an error message.
			 * 
			 * \param[in] in_guidPlatform The unique ID of the custom platform being converted for.
			 * \param[in] in_basePlatform The unique ID of the base platform being converted for.
			 * \param[in] in_szSourceFile Source file to convert data from.
			 * \param[in] in_szDestFile Destination file, must be created by the plug-in.
			 * \param[in] in_uSampleRate The target sample rate for the converted file, passing 0 will default to
			 *            the platform default.
			 * \param[in] in_uBlockLength The block length, passing 0 will default to the platform default.
			 * \param[in] in_pProgress Optional Progress Bar controller.
			 * \param io_pError Optional error string that can be displayed if ConversionResult is not successful.
			 * \result Whether the conversion was successful or not.
			 */
			virtual ConversionResult ConvertFile(
				const GUID& in_guidPlatform,
				const BasePlatformID& in_basePlatform,
				const AkOSChar * in_szSourceFile,
				const AkOSChar * in_szDestFile,
				AkUInt32 in_uSampleRate,
				AkUInt32 in_uBlockLength,
				IProgress* in_pProgress,
				IWriteString* io_pError
			) const = 0;

			/**
			 * \brief Calculates the conversion setting's hash.
			 * 
			 * The goal of this function is to return a value that can be used to indicate whether the plug-in information changed
			 * between two conversion requests. Each time a SoundBank generation is done, that value is stored, and if it's
			 * different from the previous one, or if the file changed, a new ConvertFile will be called.
			 * 
			 * \param[in] in_guidPlatform The unique ID of the custom platform for which the conversion is being done.
			 * \param[in] in_uSampleRate The target sample rate for the converted file, passing 0 will default to
			 *            the platform default.
			 * \param[in] in_uBlockLength The block length, passing 0 will default to the platform default.
			 * \return A hash value for all the plug-in parameters.
			 */
			virtual uint32_t GetCurrentConversionSettingsHash(
				const GUID& in_guidPlatform,
				AkUInt32 in_uSampleRate = 0,
				AkUInt32 in_uBlockLength = 0
			) const = 0;
		};
	} // of namespace V1

	/// Latest version of the C MediaConverter interface.
	using CMediaConverter = V1::CMediaConverter;
	/// Latest version of the C++ MediaConverter interface.
	using MediaConverter = V1::MediaConverter;

	AK_WWISE_PLUGIN_SPECIALIZE_INTERFACE_CLASS(MediaConverter);
	AK_WWISE_PLUGIN_SPECIALIZE_INTERFACE_VERSION(MediaConverter);
} // of namespace AK::Wwise::Plugin

#endif