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!FrodoRsrc/DOCDRE~1
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn hard disk » apps » Emulators |
| Filename: | !FrodoRsrc/DOCDRE~1 |
| Read OK: | ✔ |
| File size: | 11C1 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
THE DIGITAL RENDERER MODULE, V0.00 ================================== This module provides a polling-interface between applications and the sound system. It should be used if you wish to playback a sample of unknown length like when emulating another computer's sound system and/or control playback from applications which might be mapped out during WIMP polls. Otherwise you better use voice generators. You tell it the number of channels, sample period and buffer size (as needed for SWI Sound_Configure) when activating it. The module will then claim a buffer of the specified size and take over the sound system. Your job as a client is polling with DigitalRenderer_ReadState and to provide new samples when needed using DigitalRenderer_NewSample. DigitalRenderer only supports 8 bit logarithmic sound ATM since I have absolutely no documentation about 16 bit linear sound (and the PRMs are pretty useless as far as DMA- and Channel-Handlers are concerned). If any of you provided me with the necessary docs I might update it. The DigitalRenderer uses SWI chunk &4f700 (officially registered). It provides the following SWI calls: DigitalRenderer_Activate SWI &4F700 ======================== On Entry: --------- R0 number of channels, will get rounded up to (1,2,4,8). R1 Sample length (bytes per channel, must be a multiple of 16 bytes) R2 Sample period (microseconds between reading two consecutive sample bytes) On Exit: -------- --- Usage: ------ Your application must call this SWI to take over the sound system. For typical values of sample length and sample period see PRM 4. Once (successfully) activated things like the system beep won't work any more. Errors: ------- - already active - can't claim memory for buffer / handler - bad buffer size (not a multiple of 16) DigitalRenderer_Deactivate SWI &4F701 ========================== On Entry: --------- --- On Exit: -------- --- Usage: ------ If your application doesn't need sound any more it must return control to the old handlers by issuing this SWI. Errors: ------- - not active DigitalRenderer_Pause SWI &4F702 ===================== On Entry: --------- --- On Exit: -------- --- Usage: ------ This SWI suspends sound playback (disabling DMA on sample buffers and so on). In contrast to deactivating DR this will not install the old handlers but merely mute the entire sound system. Errors: ------- - not active DigitalRenderer_Resume SWI &4F703 ====================== On Entry: --------- --- On Exit: -------- --- Usage: ------ Call this to resume playback after it was paused. Errors: ------- - not active DigitalRenderer_GetTables SWI &4F704 ========================= On Entry: --------- --- On Exit: -------- R0 pointer to 8k LinToLog table for translating 13 bit signed integers to 8 bit logarithmic samples as required by the VIDC, scaled to the currently selected volume (--> SWI Sound_Volume) R1 Pointer to 256 byte LogScale table for scaling 8 bit logarithmic samples according to the currently selected volume. Errors: ------- - not active DigitalRenderer_ReadState SWI &4F705 ========================= On Entry: --------- --- On Exit: -------- R0 Digital Renderer State. Bits and their meaning when set: 0: DigitalRenderer active 1: New sample data required 2: Buffer overflow occurred Usage: ------ Call this SWI to poll DigitalRenderer. If Bit 1 is set you have to provide a new sample buffer by calling DigitalRenderer_NewSample. Bit 2 lets you check for buffer overflows (i.e. your application took too long to provide the next sample). DigitalRenderer_NewSample SWI &4F706 ========================= On Entry: --------- R0 Pointer to buffer holding new sample. On Exit: -------- --- Usage: ------ Call this when DigitalRenderer_ReadState returned with Bit 1 set. The buffer must have the correct size (number of channels * Sample length) and contain data that can be sent directly to the VIDC, i.e. 8 bit logarithmic data, interleafed for multiple channels. Errors: ------- - not active LEGAL STUFF: ============ The DigitalRenderer module is Freeware. You may use it for your own programs as long as this file is included unchanged. I won't be held responsible for any kind of damage resulting from the use of this module, use it entirely at your own risk. CONTACT: ======== Andreas Dehmel Am Schorn 18 82327 Tutzing Germany email: dehmel@informatik.tu-muenchen.de (will become invalid soon)
00000000 54 48 45 20 44 49 47 49 54 41 4c 20 52 45 4e 44 |THE DIGITAL REND| 00000010 45 52 45 52 20 4d 4f 44 55 4c 45 2c 20 56 30 2e |ERER MODULE, V0.| 00000020 30 30 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |00.=============| 00000030 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 00000040 3d 3d 3d 3d 3d 0a 0a 0a 0a 54 68 69 73 20 6d 6f |=====....This mo| 00000050 64 75 6c 65 20 70 72 6f 76 69 64 65 73 20 61 20 |dule provides a | 00000060 70 6f 6c 6c 69 6e 67 2d 69 6e 74 65 72 66 61 63 |polling-interfac| 00000070 65 20 62 65 74 77 65 65 6e 20 61 70 70 6c 69 63 |e between applic| 00000080 61 74 69 6f 6e 73 20 61 6e 64 20 74 68 65 20 73 |ations and the s| 00000090 6f 75 6e 64 0a 73 79 73 74 65 6d 2e 20 49 74 20 |ound.system. It | 000000a0 73 68 6f 75 6c 64 20 62 65 20 75 73 65 64 20 69 |should be used i| 000000b0 66 20 79 6f 75 20 77 69 73 68 20 74 6f 20 70 6c |f you wish to pl| 000000c0 61 79 62 61 63 6b 20 61 20 73 61 6d 70 6c 65 20 |ayback a sample | 000000d0 6f 66 20 75 6e 6b 6e 6f 77 6e 20 6c 65 6e 67 74 |of unknown lengt| 000000e0 68 0a 6c 69 6b 65 20 77 68 65 6e 20 65 6d 75 6c |h.like when emul| 000000f0 61 74 69 6e 67 20 61 6e 6f 74 68 65 72 20 63 6f |ating another co| 00000100 6d 70 75 74 65 72 27 73 20 73 6f 75 6e 64 20 73 |mputer's sound s| 00000110 79 73 74 65 6d 20 61 6e 64 2f 6f 72 20 63 6f 6e |ystem and/or con| 00000120 74 72 6f 6c 20 70 6c 61 79 62 61 63 6b 0a 66 72 |trol playback.fr| 00000130 6f 6d 20 61 70 70 6c 69 63 61 74 69 6f 6e 73 20 |om applications | 00000140 77 68 69 63 68 20 6d 69 67 68 74 20 62 65 20 6d |which might be m| 00000150 61 70 70 65 64 20 6f 75 74 20 64 75 72 69 6e 67 |apped out during| 00000160 20 57 49 4d 50 20 70 6f 6c 6c 73 2e 20 4f 74 68 | WIMP polls. Oth| 00000170 65 72 77 69 73 65 20 79 6f 75 0a 62 65 74 74 65 |erwise you.bette| 00000180 72 20 75 73 65 20 76 6f 69 63 65 20 67 65 6e 65 |r use voice gene| 00000190 72 61 74 6f 72 73 2e 0a 0a 59 6f 75 20 74 65 6c |rators...You tel| 000001a0 6c 20 69 74 20 74 68 65 20 6e 75 6d 62 65 72 20 |l it the number | 000001b0 6f 66 20 63 68 61 6e 6e 65 6c 73 2c 20 73 61 6d |of channels, sam| 000001c0 70 6c 65 20 70 65 72 69 6f 64 20 61 6e 64 20 62 |ple period and b| 000001d0 75 66 66 65 72 20 73 69 7a 65 20 28 61 73 20 6e |uffer size (as n| 000001e0 65 65 64 65 64 20 66 6f 72 0a 53 57 49 20 53 6f |eeded for.SWI So| 000001f0 75 6e 64 5f 43 6f 6e 66 69 67 75 72 65 29 20 77 |und_Configure) w| 00000200 68 65 6e 20 61 63 74 69 76 61 74 69 6e 67 20 69 |hen activating i| 00000210 74 2e 20 54 68 65 20 6d 6f 64 75 6c 65 20 77 69 |t. The module wi| 00000220 6c 6c 20 74 68 65 6e 20 63 6c 61 69 6d 20 61 20 |ll then claim a | 00000230 62 75 66 66 65 72 20 6f 66 0a 74 68 65 20 73 70 |buffer of.the sp| 00000240 65 63 69 66 69 65 64 20 73 69 7a 65 20 61 6e 64 |ecified size and| 00000250 20 74 61 6b 65 20 6f 76 65 72 20 74 68 65 20 73 | take over the s| 00000260 6f 75 6e 64 20 73 79 73 74 65 6d 2e 20 59 6f 75 |ound system. You| 00000270 72 20 6a 6f 62 20 61 73 20 61 20 63 6c 69 65 6e |r job as a clien| 00000280 74 20 69 73 0a 70 6f 6c 6c 69 6e 67 20 77 69 74 |t is.polling wit| 00000290 68 20 44 69 67 69 74 61 6c 52 65 6e 64 65 72 65 |h DigitalRendere| 000002a0 72 5f 52 65 61 64 53 74 61 74 65 20 61 6e 64 20 |r_ReadState and | 000002b0 74 6f 20 70 72 6f 76 69 64 65 20 6e 65 77 20 73 |to provide new s| 000002c0 61 6d 70 6c 65 73 20 77 68 65 6e 20 6e 65 65 64 |amples when need| 000002d0 65 64 0a 75 73 69 6e 67 20 44 69 67 69 74 61 6c |ed.using Digital| 000002e0 52 65 6e 64 65 72 65 72 5f 4e 65 77 53 61 6d 70 |Renderer_NewSamp| 000002f0 6c 65 2e 0a 0a 44 69 67 69 74 61 6c 52 65 6e 64 |le...DigitalRend| 00000300 65 72 65 72 20 6f 6e 6c 79 20 73 75 70 70 6f 72 |erer only suppor| 00000310 74 73 20 38 20 62 69 74 20 6c 6f 67 61 72 69 74 |ts 8 bit logarit| 00000320 68 6d 69 63 20 73 6f 75 6e 64 20 41 54 4d 20 73 |hmic sound ATM s| 00000330 69 6e 63 65 20 49 20 68 61 76 65 20 61 62 73 6f |ince I have abso| 00000340 6c 75 74 65 6c 79 0a 6e 6f 20 64 6f 63 75 6d 65 |lutely.no docume| 00000350 6e 74 61 74 69 6f 6e 20 61 62 6f 75 74 20 31 36 |ntation about 16| 00000360 20 62 69 74 20 6c 69 6e 65 61 72 20 73 6f 75 6e | bit linear soun| 00000370 64 20 28 61 6e 64 20 74 68 65 20 50 52 4d 73 20 |d (and the PRMs | 00000380 61 72 65 20 70 72 65 74 74 79 20 75 73 65 6c 65 |are pretty usele| 00000390 73 73 20 61 73 0a 66 61 72 20 61 73 20 44 4d 41 |ss as.far as DMA| 000003a0 2d 20 61 6e 64 20 43 68 61 6e 6e 65 6c 2d 48 61 |- and Channel-Ha| 000003b0 6e 64 6c 65 72 73 20 61 72 65 20 63 6f 6e 63 65 |ndlers are conce| 000003c0 72 6e 65 64 29 2e 20 49 66 20 61 6e 79 20 6f 66 |rned). If any of| 000003d0 20 79 6f 75 20 70 72 6f 76 69 64 65 64 20 6d 65 | you provided me| 000003e0 20 77 69 74 68 0a 74 68 65 20 6e 65 63 65 73 73 | with.the necess| 000003f0 61 72 79 20 64 6f 63 73 20 49 20 6d 69 67 68 74 |ary docs I might| 00000400 20 75 70 64 61 74 65 20 69 74 2e 0a 0a 0a 0a 0a | update it......| 00000410 54 68 65 20 44 69 67 69 74 61 6c 52 65 6e 64 65 |The DigitalRende| 00000420 72 65 72 20 75 73 65 73 20 53 57 49 20 63 68 75 |rer uses SWI chu| 00000430 6e 6b 20 26 34 66 37 30 30 20 28 6f 66 66 69 63 |nk &4f700 (offic| 00000440 69 61 6c 6c 79 20 72 65 67 69 73 74 65 72 65 64 |ially registered| 00000450 29 2e 20 49 74 20 70 72 6f 76 69 64 65 73 0a 74 |). It provides.t| 00000460 68 65 20 66 6f 6c 6c 6f 77 69 6e 67 20 53 57 49 |he following SWI| 00000470 20 63 61 6c 6c 73 3a 0a 0a 0a 0a 0a 0a 0a 0a 44 | calls:........D| 00000480 69 67 69 74 61 6c 52 65 6e 64 65 72 65 72 5f 41 |igitalRenderer_A| 00000490 63 74 69 76 61 74 65 09 09 53 57 49 20 26 34 46 |ctivate..SWI &4F| 000004a0 37 30 30 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |700.============| 000004b0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 0a 0a 4f |============...O| 000004c0 6e 20 45 6e 74 72 79 3a 0a 2d 2d 2d 2d 2d 2d 2d |n Entry:.-------| 000004d0 2d 2d 0a 0a 52 30 09 6e 75 6d 62 65 72 20 6f 66 |--..R0.number of| 000004e0 20 63 68 61 6e 6e 65 6c 73 2c 20 77 69 6c 6c 20 | channels, will | 000004f0 67 65 74 20 72 6f 75 6e 64 65 64 20 75 70 20 74 |get rounded up t| 00000500 6f 20 28 31 2c 32 2c 34 2c 38 29 2e 0a 52 31 09 |o (1,2,4,8)..R1.| 00000510 53 61 6d 70 6c 65 20 6c 65 6e 67 74 68 20 28 62 |Sample length (b| 00000520 79 74 65 73 20 70 65 72 20 63 68 61 6e 6e 65 6c |ytes per channel| 00000530 2c 20 6d 75 73 74 20 62 65 20 61 20 6d 75 6c 74 |, must be a mult| 00000540 69 70 6c 65 20 6f 66 20 31 36 20 62 79 74 65 73 |iple of 16 bytes| 00000550 29 0a 52 32 09 53 61 6d 70 6c 65 20 70 65 72 69 |).R2.Sample peri| 00000560 6f 64 20 28 6d 69 63 72 6f 73 65 63 6f 6e 64 73 |od (microseconds| 00000570 20 62 65 74 77 65 65 6e 20 72 65 61 64 69 6e 67 | between reading| 00000580 20 74 77 6f 20 63 6f 6e 73 65 63 75 74 69 76 65 | two consecutive| 00000590 20 73 61 6d 70 6c 65 20 62 79 74 65 73 29 0a 0a | sample bytes)..| 000005a0 0a 4f 6e 20 45 78 69 74 3a 0a 2d 2d 2d 2d 2d 2d |.On Exit:.------| 000005b0 2d 2d 0a 0a 2d 2d 2d 0a 0a 0a 55 73 61 67 65 3a |--..---...Usage:| 000005c0 0a 2d 2d 2d 2d 2d 2d 0a 0a 59 6f 75 72 20 61 70 |.------..Your ap| 000005d0 70 6c 69 63 61 74 69 6f 6e 20 6d 75 73 74 20 63 |plication must c| 000005e0 61 6c 6c 20 74 68 69 73 20 53 57 49 20 74 6f 20 |all this SWI to | 000005f0 74 61 6b 65 20 6f 76 65 72 20 74 68 65 20 73 6f |take over the so| 00000600 75 6e 64 20 73 79 73 74 65 6d 2e 20 46 6f 72 20 |und system. For | 00000610 74 79 70 69 63 61 6c 0a 76 61 6c 75 65 73 20 6f |typical.values o| 00000620 66 20 73 61 6d 70 6c 65 20 6c 65 6e 67 74 68 20 |f sample length | 00000630 61 6e 64 20 73 61 6d 70 6c 65 20 70 65 72 69 6f |and sample perio| 00000640 64 20 73 65 65 20 50 52 4d 20 34 2e 20 4f 6e 63 |d see PRM 4. Onc| 00000650 65 20 28 73 75 63 63 65 73 73 66 75 6c 6c 79 29 |e (successfully)| 00000660 0a 61 63 74 69 76 61 74 65 64 20 74 68 69 6e 67 |.activated thing| 00000670 73 20 6c 69 6b 65 20 74 68 65 20 73 79 73 74 65 |s like the syste| 00000680 6d 20 62 65 65 70 20 77 6f 6e 27 74 20 77 6f 72 |m beep won't wor| 00000690 6b 20 61 6e 79 20 6d 6f 72 65 2e 0a 0a 0a 45 72 |k any more....Er| 000006a0 72 6f 72 73 3a 0a 2d 2d 2d 2d 2d 2d 2d 0a 0a 09 |rors:.-------...| 000006b0 2d 20 61 6c 72 65 61 64 79 20 61 63 74 69 76 65 |- already active| 000006c0 0a 09 2d 20 63 61 6e 27 74 20 63 6c 61 69 6d 20 |..- can't claim | 000006d0 6d 65 6d 6f 72 79 20 66 6f 72 20 62 75 66 66 65 |memory for buffe| 000006e0 72 20 2f 20 68 61 6e 64 6c 65 72 0a 09 2d 20 62 |r / handler..- b| 000006f0 61 64 20 62 75 66 66 65 72 20 73 69 7a 65 20 28 |ad buffer size (| 00000700 6e 6f 74 20 61 20 6d 75 6c 74 69 70 6c 65 20 6f |not a multiple o| 00000710 66 20 31 36 29 0a 0a 0a 0a 0a 0a 44 69 67 69 74 |f 16)......Digit| 00000720 61 6c 52 65 6e 64 65 72 65 72 5f 44 65 61 63 74 |alRenderer_Deact| 00000730 69 76 61 74 65 09 09 53 57 49 20 26 34 46 37 30 |ivate..SWI &4F70| 00000740 31 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |1.==============| 00000750 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 0a 0a 4f |============...O| 00000760 6e 20 45 6e 74 72 79 3a 0a 2d 2d 2d 2d 2d 2d 2d |n Entry:.-------| 00000770 2d 2d 0a 0a 2d 2d 2d 0a 0a 0a 4f 6e 20 45 78 69 |--..---...On Exi| 00000780 74 3a 0a 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 2d 2d 2d |t:.--------..---| 00000790 0a 0a 0a 55 73 61 67 65 3a 0a 2d 2d 2d 2d 2d 2d |...Usage:.------| 000007a0 0a 0a 49 66 20 79 6f 75 72 20 61 70 70 6c 69 63 |..If your applic| 000007b0 61 74 69 6f 6e 20 64 6f 65 73 6e 27 74 20 6e 65 |ation doesn't ne| 000007c0 65 64 20 73 6f 75 6e 64 20 61 6e 79 20 6d 6f 72 |ed sound any mor| 000007d0 65 20 69 74 20 6d 75 73 74 20 72 65 74 75 72 6e |e it must return| 000007e0 20 63 6f 6e 74 72 6f 6c 20 74 6f 20 74 68 65 0a | control to the.| 000007f0 6f 6c 64 20 68 61 6e 64 6c 65 72 73 20 62 79 20 |old handlers by | 00000800 69 73 73 75 69 6e 67 20 74 68 69 73 20 53 57 49 |issuing this SWI| 00000810 2e 0a 0a 0a 45 72 72 6f 72 73 3a 0a 2d 2d 2d 2d |....Errors:.----| 00000820 2d 2d 2d 0a 0a 09 2d 20 6e 6f 74 20 61 63 74 69 |---...- not acti| 00000830 76 65 0a 0a 0a 0a 0a 0a 44 69 67 69 74 61 6c 52 |ve......DigitalR| 00000840 65 6e 64 65 72 65 72 5f 50 61 75 73 65 09 09 09 |enderer_Pause...| 00000850 53 57 49 20 26 34 46 37 30 32 0a 3d 3d 3d 3d 3d |SWI &4F702.=====| 00000860 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 00000870 0a 0a 0a 4f 6e 20 45 6e 74 72 79 3a 0a 2d 2d 2d |...On Entry:.---| 00000880 2d 2d 2d 2d 2d 2d 0a 0a 2d 2d 2d 0a 0a 0a 4f 6e |------..---...On| 00000890 20 45 78 69 74 3a 0a 2d 2d 2d 2d 2d 2d 2d 2d 0a | Exit:.--------.| 000008a0 0a 2d 2d 2d 0a 0a 0a 55 73 61 67 65 3a 0a 2d 2d |.---...Usage:.--| 000008b0 2d 2d 2d 2d 0a 0a 54 68 69 73 20 53 57 49 20 73 |----..This SWI s| 000008c0 75 73 70 65 6e 64 73 20 73 6f 75 6e 64 20 70 6c |uspends sound pl| 000008d0 61 79 62 61 63 6b 20 28 64 69 73 61 62 6c 69 6e |ayback (disablin| 000008e0 67 20 44 4d 41 20 6f 6e 20 73 61 6d 70 6c 65 20 |g DMA on sample | 000008f0 62 75 66 66 65 72 73 20 61 6e 64 20 73 6f 20 6f |buffers and so o| 00000900 6e 29 2e 0a 49 6e 20 63 6f 6e 74 72 61 73 74 20 |n)..In contrast | 00000910 74 6f 20 64 65 61 63 74 69 76 61 74 69 6e 67 20 |to deactivating | 00000920 44 52 20 74 68 69 73 20 77 69 6c 6c 20 6e 6f 74 |DR this will not| 00000930 20 69 6e 73 74 61 6c 6c 20 74 68 65 20 6f 6c 64 | install the old| 00000940 20 68 61 6e 64 6c 65 72 73 20 62 75 74 20 6d 65 | handlers but me| 00000950 72 65 6c 79 0a 6d 75 74 65 20 74 68 65 20 65 6e |rely.mute the en| 00000960 74 69 72 65 20 73 6f 75 6e 64 20 73 79 73 74 65 |tire sound syste| 00000970 6d 2e 0a 0a 0a 45 72 72 6f 72 73 3a 0a 2d 2d 2d |m....Errors:.---| 00000980 2d 2d 2d 2d 0a 0a 09 2d 20 6e 6f 74 20 61 63 74 |----...- not act| 00000990 69 76 65 0a 0a 0a 0a 0a 0a 44 69 67 69 74 61 6c |ive......Digital| 000009a0 52 65 6e 64 65 72 65 72 5f 52 65 73 75 6d 65 09 |Renderer_Resume.| 000009b0 09 09 53 57 49 20 26 34 46 37 30 33 0a 3d 3d 3d |..SWI &4F703.===| 000009c0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 000009d0 3d 3d 3d 0a 0a 0a 4f 6e 20 45 6e 74 72 79 3a 0a |===...On Entry:.| 000009e0 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 2d 2d 2d 0a 0a |---------..---..| 000009f0 0a 4f 6e 20 45 78 69 74 3a 0a 2d 2d 2d 2d 2d 2d |.On Exit:.------| 00000a00 2d 2d 0a 0a 2d 2d 2d 0a 0a 0a 55 73 61 67 65 3a |--..---...Usage:| 00000a10 0a 2d 2d 2d 2d 2d 2d 0a 0a 43 61 6c 6c 20 74 68 |.------..Call th| 00000a20 69 73 20 74 6f 20 72 65 73 75 6d 65 20 70 6c 61 |is to resume pla| 00000a30 79 62 61 63 6b 20 61 66 74 65 72 20 69 74 20 77 |yback after it w| 00000a40 61 73 20 70 61 75 73 65 64 2e 0a 0a 0a 45 72 72 |as paused....Err| 00000a50 6f 72 73 3a 0a 2d 2d 2d 2d 2d 2d 2d 0a 0a 09 2d |ors:.-------...-| 00000a60 20 6e 6f 74 20 61 63 74 69 76 65 0a 0a 0a 0a 0a | not active.....| 00000a70 0a 44 69 67 69 74 61 6c 52 65 6e 64 65 72 65 72 |.DigitalRenderer| 00000a80 5f 47 65 74 54 61 62 6c 65 73 09 09 53 57 49 20 |_GetTables..SWI | 00000a90 26 34 46 37 30 34 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d |&4F704.=========| 00000aa0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 00000ab0 0a 0a 0a 4f 6e 20 45 6e 74 72 79 3a 0a 2d 2d 2d |...On Entry:.---| 00000ac0 2d 2d 2d 2d 2d 2d 0a 0a 2d 2d 2d 0a 0a 0a 4f 6e |------..---...On| 00000ad0 20 45 78 69 74 3a 0a 2d 2d 2d 2d 2d 2d 2d 2d 0a | Exit:.--------.| 00000ae0 0a 52 30 09 70 6f 69 6e 74 65 72 20 74 6f 20 38 |.R0.pointer to 8| 00000af0 6b 20 4c 69 6e 54 6f 4c 6f 67 20 74 61 62 6c 65 |k LinToLog table| 00000b00 20 66 6f 72 20 74 72 61 6e 73 6c 61 74 69 6e 67 | for translating| 00000b10 20 31 33 20 62 69 74 20 73 69 67 6e 65 64 20 69 | 13 bit signed i| 00000b20 6e 74 65 67 65 72 73 0a 09 74 6f 20 38 20 62 69 |ntegers..to 8 bi| 00000b30 74 20 6c 6f 67 61 72 69 74 68 6d 69 63 20 73 61 |t logarithmic sa| 00000b40 6d 70 6c 65 73 20 61 73 20 72 65 71 75 69 72 65 |mples as require| 00000b50 64 20 62 79 20 74 68 65 20 56 49 44 43 2c 20 73 |d by the VIDC, s| 00000b60 63 61 6c 65 64 20 74 6f 20 74 68 65 0a 09 63 75 |caled to the..cu| 00000b70 72 72 65 6e 74 6c 79 20 73 65 6c 65 63 74 65 64 |rrently selected| 00000b80 20 76 6f 6c 75 6d 65 20 28 2d 2d 3e 20 53 57 49 | volume (--> SWI| 00000b90 20 53 6f 75 6e 64 5f 56 6f 6c 75 6d 65 29 0a 0a | Sound_Volume)..| 00000ba0 52 31 09 50 6f 69 6e 74 65 72 20 74 6f 20 32 35 |R1.Pointer to 25| 00000bb0 36 20 62 79 74 65 20 4c 6f 67 53 63 61 6c 65 20 |6 byte LogScale | 00000bc0 74 61 62 6c 65 20 66 6f 72 20 73 63 61 6c 69 6e |table for scalin| 00000bd0 67 20 38 20 62 69 74 20 6c 6f 67 61 72 69 74 68 |g 8 bit logarith| 00000be0 6d 69 63 0a 09 73 61 6d 70 6c 65 73 20 61 63 63 |mic..samples acc| 00000bf0 6f 72 64 69 6e 67 20 74 6f 20 74 68 65 20 63 75 |ording to the cu| 00000c00 72 72 65 6e 74 6c 79 20 73 65 6c 65 63 74 65 64 |rrently selected| 00000c10 20 76 6f 6c 75 6d 65 2e 0a 0a 0a 45 72 72 6f 72 | volume....Error| 00000c20 73 3a 0a 2d 2d 2d 2d 2d 2d 2d 0a 0a 09 2d 20 6e |s:.-------...- n| 00000c30 6f 74 20 61 63 74 69 76 65 0a 0a 0a 0a 0a 0a 44 |ot active......D| 00000c40 69 67 69 74 61 6c 52 65 6e 64 65 72 65 72 5f 52 |igitalRenderer_R| 00000c50 65 61 64 53 74 61 74 65 09 09 53 57 49 20 26 34 |eadState..SWI &4| 00000c60 46 37 30 35 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |F705.===========| 00000c70 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 0a |==============..| 00000c80 0a 4f 6e 20 45 6e 74 72 79 3a 0a 2d 2d 2d 2d 2d |.On Entry:.-----| 00000c90 2d 2d 2d 2d 0a 0a 2d 2d 2d 0a 0a 0a 4f 6e 20 45 |----..---...On E| 00000ca0 78 69 74 3a 0a 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 52 |xit:.--------..R| 00000cb0 30 09 44 69 67 69 74 61 6c 20 52 65 6e 64 65 72 |0.Digital Render| 00000cc0 65 72 20 53 74 61 74 65 2e 20 42 69 74 73 20 61 |er State. Bits a| 00000cd0 6e 64 20 74 68 65 69 72 20 6d 65 61 6e 69 6e 67 |nd their meaning| 00000ce0 20 77 68 65 6e 20 73 65 74 3a 0a 0a 09 30 3a 09 | when set:...0:.| 00000cf0 44 69 67 69 74 61 6c 52 65 6e 64 65 72 65 72 20 |DigitalRenderer | 00000d00 61 63 74 69 76 65 0a 09 31 3a 09 4e 65 77 20 73 |active..1:.New s| 00000d10 61 6d 70 6c 65 20 64 61 74 61 20 72 65 71 75 69 |ample data requi| 00000d20 72 65 64 0a 09 32 3a 09 42 75 66 66 65 72 20 6f |red..2:.Buffer o| 00000d30 76 65 72 66 6c 6f 77 20 6f 63 63 75 72 72 65 64 |verflow occurred| 00000d40 0a 0a 0a 55 73 61 67 65 3a 0a 2d 2d 2d 2d 2d 2d |...Usage:.------| 00000d50 0a 0a 43 61 6c 6c 20 74 68 69 73 20 53 57 49 20 |..Call this SWI | 00000d60 74 6f 20 70 6f 6c 6c 20 44 69 67 69 74 61 6c 52 |to poll DigitalR| 00000d70 65 6e 64 65 72 65 72 2e 20 49 66 20 42 69 74 20 |enderer. If Bit | 00000d80 31 20 69 73 20 73 65 74 20 79 6f 75 20 68 61 76 |1 is set you hav| 00000d90 65 20 74 6f 20 70 72 6f 76 69 64 65 20 61 0a 6e |e to provide a.n| 00000da0 65 77 20 73 61 6d 70 6c 65 20 62 75 66 66 65 72 |ew sample buffer| 00000db0 20 62 79 20 63 61 6c 6c 69 6e 67 20 44 69 67 69 | by calling Digi| 00000dc0 74 61 6c 52 65 6e 64 65 72 65 72 5f 4e 65 77 53 |talRenderer_NewS| 00000dd0 61 6d 70 6c 65 2e 20 42 69 74 20 32 20 6c 65 74 |ample. Bit 2 let| 00000de0 73 20 79 6f 75 20 63 68 65 63 6b 0a 66 6f 72 20 |s you check.for | 00000df0 62 75 66 66 65 72 20 6f 76 65 72 66 6c 6f 77 73 |buffer overflows| 00000e00 20 28 69 2e 65 2e 20 79 6f 75 72 20 61 70 70 6c | (i.e. your appl| 00000e10 69 63 61 74 69 6f 6e 20 74 6f 6f 6b 20 74 6f 6f |ication took too| 00000e20 20 6c 6f 6e 67 20 74 6f 20 70 72 6f 76 69 64 65 | long to provide| 00000e30 20 74 68 65 20 6e 65 78 74 0a 73 61 6d 70 6c 65 | the next.sample| 00000e40 29 2e 0a 0a 0a 0a 0a 0a 44 69 67 69 74 61 6c 52 |).......DigitalR| 00000e50 65 6e 64 65 72 65 72 5f 4e 65 77 53 61 6d 70 6c |enderer_NewSampl| 00000e60 65 09 09 53 57 49 20 26 34 46 37 30 36 0a 3d 3d |e..SWI &4F706.==| 00000e70 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 00000e80 3d 3d 3d 3d 3d 3d 3d 0a 0a 0a 4f 6e 20 45 6e 74 |=======...On Ent| 00000e90 72 79 3a 0a 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 52 |ry:.---------..R| 00000ea0 30 09 50 6f 69 6e 74 65 72 20 74 6f 20 62 75 66 |0.Pointer to buf| 00000eb0 66 65 72 20 68 6f 6c 64 69 6e 67 20 6e 65 77 20 |fer holding new | 00000ec0 73 61 6d 70 6c 65 2e 0a 0a 0a 4f 6e 20 45 78 69 |sample....On Exi| 00000ed0 74 3a 0a 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 2d 2d 2d |t:.--------..---| 00000ee0 0a 0a 0a 55 73 61 67 65 3a 0a 2d 2d 2d 2d 2d 2d |...Usage:.------| 00000ef0 0a 0a 43 61 6c 6c 20 74 68 69 73 20 77 68 65 6e |..Call this when| 00000f00 20 44 69 67 69 74 61 6c 52 65 6e 64 65 72 65 72 | DigitalRenderer| 00000f10 5f 52 65 61 64 53 74 61 74 65 20 72 65 74 75 72 |_ReadState retur| 00000f20 6e 65 64 20 77 69 74 68 20 42 69 74 20 31 20 73 |ned with Bit 1 s| 00000f30 65 74 2e 20 54 68 65 20 62 75 66 66 65 72 20 6d |et. The buffer m| 00000f40 75 73 74 0a 68 61 76 65 20 74 68 65 20 63 6f 72 |ust.have the cor| 00000f50 72 65 63 74 20 73 69 7a 65 20 28 6e 75 6d 62 65 |rect size (numbe| 00000f60 72 20 6f 66 20 63 68 61 6e 6e 65 6c 73 20 2a 20 |r of channels * | 00000f70 53 61 6d 70 6c 65 20 6c 65 6e 67 74 68 29 20 61 |Sample length) a| 00000f80 6e 64 20 63 6f 6e 74 61 69 6e 20 64 61 74 61 20 |nd contain data | 00000f90 74 68 61 74 0a 63 61 6e 20 62 65 20 73 65 6e 74 |that.can be sent| 00000fa0 20 64 69 72 65 63 74 6c 79 20 74 6f 20 74 68 65 | directly to the| 00000fb0 20 56 49 44 43 2c 20 69 2e 65 2e 20 38 20 62 69 | VIDC, i.e. 8 bi| 00000fc0 74 20 6c 6f 67 61 72 69 74 68 6d 69 63 20 64 61 |t logarithmic da| 00000fd0 74 61 2c 20 69 6e 74 65 72 6c 65 61 66 65 64 20 |ta, interleafed | 00000fe0 66 6f 72 0a 6d 75 6c 74 69 70 6c 65 20 63 68 61 |for.multiple cha| 00000ff0 6e 6e 65 6c 73 2e 0a 0a 0a 45 72 72 6f 72 73 3a |nnels....Errors:| 00001000 0a 2d 2d 2d 2d 2d 2d 2d 0a 0a 09 2d 20 6e 6f 74 |.-------...- not| 00001010 20 61 63 74 69 76 65 0a 0a 0a 0a 0a 0a 0a 0a 0a | active.........| 00001020 4c 45 47 41 4c 20 53 54 55 46 46 3a 0a 3d 3d 3d |LEGAL STUFF:.===| 00001030 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 0a 0a 54 68 65 20 |=========...The | 00001040 44 69 67 69 74 61 6c 52 65 6e 64 65 72 65 72 20 |DigitalRenderer | 00001050 6d 6f 64 75 6c 65 20 69 73 20 46 72 65 65 77 61 |module is Freewa| 00001060 72 65 2e 20 59 6f 75 20 6d 61 79 20 75 73 65 20 |re. You may use | 00001070 69 74 20 66 6f 72 20 79 6f 75 72 20 6f 77 6e 20 |it for your own | 00001080 70 72 6f 67 72 61 6d 73 20 61 73 0a 6c 6f 6e 67 |programs as.long| 00001090 20 61 73 20 74 68 69 73 20 66 69 6c 65 20 69 73 | as this file is| 000010a0 20 69 6e 63 6c 75 64 65 64 20 75 6e 63 68 61 6e | included unchan| 000010b0 67 65 64 2e 20 49 20 77 6f 6e 27 74 20 62 65 20 |ged. I won't be | 000010c0 68 65 6c 64 20 72 65 73 70 6f 6e 73 69 62 6c 65 |held responsible| 000010d0 20 66 6f 72 20 61 6e 79 20 6b 69 6e 64 0a 6f 66 | for any kind.of| 000010e0 20 64 61 6d 61 67 65 20 72 65 73 75 6c 74 69 6e | damage resultin| 000010f0 67 20 66 72 6f 6d 20 74 68 65 20 75 73 65 20 6f |g from the use o| 00001100 66 20 74 68 69 73 20 6d 6f 64 75 6c 65 2c 20 75 |f this module, u| 00001110 73 65 20 69 74 20 65 6e 74 69 72 65 6c 79 20 61 |se it entirely a| 00001120 74 20 79 6f 75 72 20 6f 77 6e 20 72 69 73 6b 2e |t your own risk.| 00001130 0a 0a 0a 0a 0a 0a 43 4f 4e 54 41 43 54 3a 0a 3d |......CONTACT:.=| 00001140 3d 3d 3d 3d 3d 3d 3d 0a 0a 0a 41 6e 64 72 65 61 |=======...Andrea| 00001150 73 20 44 65 68 6d 65 6c 0a 41 6d 20 53 63 68 6f |s Dehmel.Am Scho| 00001160 72 6e 20 31 38 0a 38 32 33 32 37 20 54 75 74 7a |rn 18.82327 Tutz| 00001170 69 6e 67 0a 47 65 72 6d 61 6e 79 0a 0a 65 6d 61 |ing.Germany..ema| 00001180 69 6c 3a 09 64 65 68 6d 65 6c 40 69 6e 66 6f 72 |il:.dehmel@infor| 00001190 6d 61 74 69 6b 2e 74 75 2d 6d 75 65 6e 63 68 65 |matik.tu-muenche| 000011a0 6e 2e 64 65 0a 09 28 77 69 6c 6c 20 62 65 63 6f |n.de..(will beco| 000011b0 6d 65 20 69 6e 76 61 6c 69 64 20 73 6f 6f 6e 29 |me invalid soon)| 000011c0 0a |.| 000011c1
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