58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
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#pragma once
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#include "foundation/dispatch.h"
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#include "nx/nxuri.h"
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#include "metadata/ifc_metadata.h"
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/* this is the class you actually use */
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class ifc_audio_decoder_callback : public Wasabi2::Dispatchable
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{
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protected:
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ifc_audio_decoder_callback() : Dispatchable(DISPATCHABLE_VERSION) {}
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~ifc_audio_decoder_callback() {}
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public:
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/* you must implement this class to use the decoder */
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class callback : public Wasabi2::Dispatchable
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{
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protected:
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callback() : Dispatchable(DISPATCHABLE_VERSION) {}
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~callback() {}
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public:
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/* frames is defined as all channels, e.g. 16bit stereo is 4 bytes per frame (2 bytes per sample)
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return NErr_Success to continue receiving callbacks
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*/
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int OnAudio(const void *buffer, size_t buffer_frames) { return AudioDecoderCallback_OnAudio(buffer, buffer_frames); }
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enum
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{
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DISPATCHABLE_VERSION=0,
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};
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private:
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virtual int WASABICALL AudioDecoderCallback_OnAudio(const void *buffer, size_t buffer_frames)=0;
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};
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/* if possible, returns an upper bound on the number of frames used internally. this would be the maximum buffer_frames value you receive in a callback */
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int GetFrameSize(size_t *frame_size) { return AudioDecoderCallback_GetFrameSize(frame_size); }
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int GetMetadata(ifc_metadata **metadata) { return AudioDecoderCallback_GetMetadata(metadata); }
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/* returns
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* NErr_Success on a successfully completed decode
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* NErr_Interrupted if the callback function aborted decoding
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* anything else indicates a decoding error
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*/
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int Decode(ifc_audio_decoder_callback::callback *callback) { return AudioDecoderCallback_Decode(callback); }
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/* Like decode, but only processes one frame.
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returns NErr_EndOfFile on the last frame */
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int DecodeStep(ifc_audio_decoder_callback::callback *callback) { return AudioDecoderCallback_DecodeStep(callback); }
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enum
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{
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DISPATCHABLE_VERSION=0,
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};
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private:
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virtual int WASABICALL AudioDecoderCallback_Decode(ifc_audio_decoder_callback::callback *callback)=0;
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virtual int WASABICALL AudioDecoderCallback_DecodeStep(ifc_audio_decoder_callback::callback *callback)=0;
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virtual int WASABICALL AudioDecoderCallback_GetFrameSize(size_t *frame_size)=0;
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virtual int WASABICALL AudioDecoderCallback_GetMetadata(ifc_metadata **metadata)=0;
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};
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