2002-06-09 02:54:28 +00:00
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all audio codecs (cook,atrk,14_4,28_8,dnet,sipr) have the same interface,
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but i have only analyzed the cook codec
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audio properties
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00 short text/description of the format (bitrate, when to use)
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2002-06-09 22:02:46 +00:00
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01 bitrate (bits/s) //avg. bytes/sec output
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2002-06-09 02:54:28 +00:00
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02 ulong: ?
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ulong: samples per second
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ushort: bits/sample
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ushort: number of channels
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2002-06-09 22:02:46 +00:00
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03 same as 02 //constant 2
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2002-06-09 02:54:28 +00:00
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04 long description
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05 constant 1 (always?)
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2002-06-09 22:02:46 +00:00
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06 ulong: block align (input frame size for RADecode)
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2002-06-09 02:54:28 +00:00
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07 string: minimum player version
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08 n/a
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09 n/a
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0A n/a
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0B n/a
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0C n/a
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0D ?
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0E ?
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0F ?
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10 ?
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11 ?
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12 ?
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13 min. output buffer size? max. number of samples?
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14 ?
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functions:
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ulong result=RAOpenCodec2(ra_main_t *raMain);
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ulong result=RAInitDecoder(ra_main_t *raMain, p2);
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2002-06-09 22:02:46 +00:00
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p2 points to an array of 7 longs:
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bfffefe0 22 56 00 00 10 00 02 00 64 00 00 00 3c 00 00 00 "V......d...<...
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bfffeff0 58 02 00 00 10 00 00 00 f0 73 1c 08 7c f0 ff bf X........s..|...
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long 00005622=22050 (Hz)
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short 0010=16 (bit)
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short 0002=2 (channels)
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long 00000064=100 ???
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long 0000003c=60 ???
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long 00000258=600 packet size (used for 'p3' of RADecode)
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long 00000010=16 ???
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long 081c73f0= looks like a pointer
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2002-06-09 02:54:28 +00:00
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void *GetRAFlavorProperty(ra_main_t *raMain, ulong flavor, ulong property,
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short *property_length_in_bytes);
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returns property data for a specific data
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ulong RADecode(ra_main_t *raMain, char *input_buffer,
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ulong input_buffer_size, char *output_buffer,
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ulong *decoded_bytes, ulong p6=-1);
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RAFreeDecoder(ra_main_t *);
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RACloseCodec(ra_main_t *);
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ulong RASetFlavor(ra_main_t *ra_main, ulong flavor);
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a flavor is an entry in the list of available format variations like
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bitrate, number of channels, decoding algorithm, and so on
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