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60 lines
No EOL
2.6 KiB
C++
60 lines
No EOL
2.6 KiB
C++
#pragma once
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#include <bfc/dispatch.h>
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class ifc_audioFileEncoder : public Dispatchable
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{
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protected:
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ifc_audioFileEncoder() {}
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~ifc_audioFileEncoder() {}
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public:
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/*
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@param frame - frame number, optional (pass 0 every time if you don't have it).
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it is used for special purposes and is not generally needed.
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@param data - the input data (audio)
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@param data_len - number of valid bytes in data
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@param data_used - on return, set to the number of audio bytes read
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note for implementors:
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it is highly recommended that implementation use all available input data, but it is not required.
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note for users:
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if not all input data is read, you need to pass in the old data again
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but have more available. This is likely to happen when the block size of the codec
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does not match your buffer size
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*/
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int Feed(uint32_t frame, const void *data, size_t data_len, size_t *data_used);
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// same as above, but used when you have no more input to pass
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// you can pass more audio data if you like (preferred if possible)
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// or pass 0 for data & data_len if you passed all your data to Feed()
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// note to implementors:
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// for many implementations: close your encoder (e.g. vorbis) but not your file writer (e.g. ogg)
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// note to users:
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// you still need to call Finish().
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int Finish(uint32_t frame, const void *data, size_t data_len, size_t *data_used);
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// call this to do whatever necessary
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// this is a separate call than Finish() because of time-constraints and the killswitch
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// for many implementations: close your file writer object here, write seek table, etc.
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// note to users:
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// after this function succeeds, you may use the file (write metadata, etc)
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int Finalize(int *killswitch);
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// @param block_size - on return, set to the 'natural' number of bytes that the audio encoder expects
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// can be helpful for users of this object to do more efficient I/O
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// optional (check the return value when you call this!)
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// but recommended
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int GetBlockSize(size_t *block_size);
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// @param fill_size - on return, set to the number of bytes needed to fill the audio encoder's current block
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// might be 0 for some types (WAV).
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// can be helpful for users of this object to do more efficient I/O
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// optional (check the return value when you call this!)
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// don't implement unless it's easy
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int GetFillSize(size_t *fill_size);
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// @param bytes_written - on return, set to the number of encoded bytes written so far.
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// used by the CD ripper to show a 'real time' bitrate
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// optional (check the return value when you call this!)
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// don't implement unless it's easy
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int GetBytesWritten(size_t *bytes_written);
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}; |