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