basic WAV support
This commit is contained in:
parent
6ee7adad4d
commit
dab32fea09
|
|
@ -0,0 +1,137 @@
|
|||
( wave.tal )
|
||||
( )
|
||||
( currently reads PCM data )
|
||||
|
||||
( WAV format (number byte order is LE) )
|
||||
( )
|
||||
( BYTES EXAMPLE BYTES DESCRIPTION )
|
||||
( 0-3 "RIFF" 52 49 46 46 riff string )
|
||||
( 4-7 10248036 64 5f 9c 00 overall file size - 8 bytes )
|
||||
( 8-11 "WAVE" 57 41 56 45 wave string )
|
||||
( 12-15 "fmt " 66 6d 74 20 fmt string )
|
||||
( 16-19 1 01 00 00 00 length of format data? [???] )
|
||||
( 20-21 1 01 00 type of data, 1 is PCM )
|
||||
( 22-23 1 01 00 number of channels, 1 is mono )
|
||||
( 24-27 44100 44 ac 00 00 sample-rate, 44100 is 44.1 kHz )
|
||||
( 28-31 44100 44 ac 00 00 [rate * channels * bits/channel]/8 )
|
||||
( 32-33 1 01 00 [bitrate*channels]/8 )
|
||||
( 34-35 8 08 00 bitrate, i.e. bits per sample )
|
||||
( 36-39 "data" 64 61 74 61 data string )
|
||||
( 40-43 10248000 40 5f 9c 00 data size in bytes )
|
||||
( 44+ PCM data, little endian byte order )
|
||||
( )
|
||||
( more complex WAV files may have other structures. )
|
||||
( )
|
||||
( we can validate whether the WAV is a format we can handle )
|
||||
( by comparing byes 4-7 with bytes 40-43. if the former is )
|
||||
( 36 bytes larger than the latter, the file has a standard )
|
||||
( structure which we can easily parse. )
|
||||
( )
|
||||
( s16 -> u8: hi-byte + 0x80 )
|
||||
( stereo -> mono, take second sample )
|
||||
|
||||
|30 @Audio0 [ &vec $2 &pos $2 &out $1 &pad $3 &adsr $2 &len $2 &addr $2 &vol $1 &pitch $1 ]
|
||||
|40 @Audio1 [ &vec $2 &pos $2 &out $1 &pad $3 &adsr $2 &len $2 &addr $2 &vol $1 &pitch $1 ]
|
||||
|50 @Audio2 [ &vec $2 &pos $2 &out $1 &pad $3 &adsr $2 &len $2 &addr $2 &vol $1 &pitch $1 ]
|
||||
|60 @Audio3 [ &vec $2 &pos $2 &out $1 &pad $3 &adsr $2 &len $2 &addr $2 &vol $1 &pitch $1 ]
|
||||
|a0 @File [ &vec $2 &ok $2 &stat $2 &del $1 &append $1 &name $2 &len $2 &r $2 &w $2 ]
|
||||
|
||||
|0000
|
||||
@done $1
|
||||
|
||||
|0100
|
||||
;path .File/name DEO2
|
||||
parse
|
||||
#2000 .File/len DEO2
|
||||
#2000 ;len0 STA2 #2000 ;buf0 zero-buf-u8
|
||||
#2000 ;len1 STA2 #2000 ;buf1 zero-buf-u8
|
||||
!play0
|
||||
|
||||
@zero-buf-u8 ( len* buf* -> )
|
||||
STH2k ADD2 STH2 SWP2r ( [limit=buf+len* buf*] )
|
||||
#80 ( 80^ [limit* buf*] )
|
||||
&loop ( 80^ [limit* pos*] )
|
||||
DUP STH2kr STA ( 80^ [limit* pos*] ; pos<-80 )
|
||||
INC2r GTH2kr STHr ?&loop ( 80^ [limit* pos+1*] )
|
||||
POP POP2r POP2r JMP2r ( )
|
||||
|
||||
( data created using: )
|
||||
( lame --decode tokyo-skies.mp3 # produced tokyo-skies.wav )
|
||||
( sox tokyo-skies.wav -c 1 -e unsigned-integer -b 8 tokyo-skies-mono-u8.wav )
|
||||
( sox tokyo-skies-mono-u8.wav tokyo-skies.raw )
|
||||
|
||||
( @path "tokyo-skies.raw 00 )
|
||||
@path "tokyo-skies-mono-u8.wav 00
|
||||
( @path "tokyo-skies.wav 00 )
|
||||
|
||||
( TODO: actually parse )
|
||||
@parse ( -> )
|
||||
#002c .File/len DEO2
|
||||
;buf0 .File/r DEO2
|
||||
.File/ok DEI2
|
||||
#002c EQU2 ?&ok #0000 DIV &ok JMP2r
|
||||
|
||||
@reload-mono-u8 ( l-addr* b-addr* -> )
|
||||
.done LDZ ?&skip ( l-addr* b-addr* )
|
||||
.File/r DEO2 ( l-addr* )
|
||||
.File/ok DEI2 ( l-addr* read* )
|
||||
DUP2 ROT2 STA2 ( read* ; l-addr<-read )
|
||||
#2000 EQU2 ?&end ( ; if we read 0x2000 we are not done )
|
||||
#01 .done STZ ( ; done<-1 )
|
||||
&end JMP2r ( )
|
||||
&skip POP2 POP2 JMP2r ( )
|
||||
|
||||
@reload-stereo-s16 ( l-addr* b-addr* -> )
|
||||
.done LDZ ?&skip ( l-addr* b-addr* )
|
||||
SWP2 ( b-addr* l-addr* )
|
||||
;scratch .File/r DEO2 ( b-addr* l-addr* )
|
||||
.File/ok DEI2 ( b-addr* l-addr* read* )
|
||||
DUP2 #02 SFT2 ROT2 STA2 ( b-addr* read* ; l-addr<-read/4 )
|
||||
DUP2 #2000 EQU2 ?&end ( b-addr* read* ; if we read 0x2000 we are not done )
|
||||
#01 .done STZ ( b-addr* read* ; done<-1 )
|
||||
&end ( b-addr* read* )
|
||||
SWP2 STH2 ;scratch ( read* scratch* [b-addr*] )
|
||||
DUP2 ROT2 ADD2 SWP2 ( limit=scratch+read* scratch* [b-addr*] )
|
||||
INC2 ( limit* scratch+3* [b-addr*] )
|
||||
&loop ( limit* pos* [bpos*] )
|
||||
s16-to-u8 ( limit* pos+4* sample^ [bpos*] )
|
||||
STH2kr STA ( limit* pos* [bpos*] ; bpos<-sample )
|
||||
INC2r ( limit* pos+4* [bpos+1*] )
|
||||
GTH2k ?&loop ( limit* pos+4* [bpos+1*] )
|
||||
POP2r ( limit* pos+4* )
|
||||
&skip POP2 POP2 JMP2r ( )
|
||||
|
||||
@s16-to-u8 ( pos* -> pos+4* sample^ )
|
||||
LDAk #80 ADD #00 SWP STH2
|
||||
INC2 INC2
|
||||
LDAk #80 ADD #00 SWP STH2
|
||||
ADD2r LITr 01 SFT2r NIPr
|
||||
INC2 INC2
|
||||
STHr JMP2r
|
||||
|
||||
@play0 ( -> ) ;play1 ;len0 ;buf0 !play
|
||||
@play1 ( -> ) ;play0 ;len1 ;buf1 !play
|
||||
|
||||
@play ( next* l-addr* b-addr* -> )
|
||||
OVR2 LDA2 ORAk ?&nonzero ( next* l-addr* b-addr* n* )
|
||||
POP2 POP2 POP2 POP2 ( ; clear stack )
|
||||
#010f BRK ( ; exit )
|
||||
&nonzero ( next* l-addr b-addr* n* )
|
||||
OVR2 output ( next* l-addr b-addr* ; play buf1 )
|
||||
reload-mono-u8 ( next* ; load more data )
|
||||
( reload-stereo-s16 ) ( next* ; load more data )
|
||||
.Audio0/vec DEO2 ( ; Audio0/vec<-next )
|
||||
BRK ( )
|
||||
|
||||
@output ( len* addr* -> )
|
||||
.Audio0/addr DEO2 ( ; <- write buf addr )
|
||||
.Audio0/len DEO2 ( ; <- write len )
|
||||
#0000 .Audio0/adsr DEO2 ( ; <- write ignore envelope )
|
||||
#ff .Audio0/vol DEO ( ; <- play 100% volume )
|
||||
#bc .Audio0/pitch DEO ( ; <- play standard sample once )
|
||||
JMP2r
|
||||
|
||||
@len0 $2 @buf0 $2000
|
||||
@len1 $2 @buf1 $2000
|
||||
|
||||
@scratch $2000
|
||||
Loading…
Reference in New Issue