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(MESS) upd1771: replace waveforms with waveforms extracted from upd1771c-017 internal rom. [Lord Nightmare, plgdavid]

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Lord-Nightmare 2015-04-12 13:20:20 -04:00
parent 7977b2a8f6
commit 12ea6b4ca5
1 changed files with 18 additions and 14 deletions
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32
src/mess/audio/upd1771.c
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@ -174,22 +174,26 @@
#define LOG 0
/*
Each of the 8 waveforms have been sampled at 192kHz using period 0xFF,
filtered, and each of the 32 levels have been calculated with averages on around 10 samples
(removing the transition samples) then quantized to int8_t's.
We are not clear on the exact DAC details yet, especially with regards to volume changes.
External AC coupling is assumed in the use of this DAC, so we will center the 8bit data using a signed container
Each of the 8 waveforms have been extracted from the uPD1771c-017 internal
ROM, from offset 0x1fd (start of first waveform) to offset 0x2fc (end of
last waveform).
(note: given test mode dumping offset non-clarity it may be 0x200-0x2ff)
The waveforms are stored in an 8-bit sign-magnitude format, so if in ROM the
upper bit is 0x80, invert the lower 7 bits to get the 2's complement result
seen here.
Note that only the last 4 waveforms appear to have been intended for use as
waveforms; the first four look as if they're playing back a piece of code as
wave data.
*/
const char WAVEFORMS[8][32]={
{ -5, -5, -5,-117,-116, -53, -10, 127, 120, 108, 97, -121,-121,-121, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4,-119,-119,-118, -2, -2, -2, -2, -2},
{ 6, -21, -1, -41, -1, 25, -35, -35, -1, -16, 34, 29, -37, -30, -33, -20, 38, -15, 50, -20, -20, -15, 7, -20, 77, -15, -37, 69, 93, -21, -38, -37},
{ -11, -4, -11, 51, -9, -11, -11, 84, 87,-112, 44, 102, -86,-112, 35, 103, -12, 51, -10, -12, -12, -9, -12, 13, -11, -44, 25, 103, -12, -5, -90,-101},
{ 40, 98, 31, 98, -1, 13, 58, 3, -18, 45, -5, -13, -5, -13, -5, -13, -5, -13, -5, -13, -10, -15,-121, 5, -17, 45,-128, 8, -16, -12, -16, -9},
{ -53,-101,-121,-128,-113, -77, -34, 5, 26, 63, 97, 117, 119, 119, 115, 99, 54, 13, -13, -11, -2, 3, 31, 52, 62, 74, 60, 51, 38, 22, 8, -14},
{ -86,-128, -60, 3, 65, 101, 119, 44, 37, 41, 51, 53, 55, 58, 58, 29, -12, 74, 82, 77, 59, 113, 52, 21, 24, 34, 39, 45, 48, 48, 48, -13},
{ -15, -18, -46, -67, -95,-111,-117,-124,-128,-123,-116, -105, -89, -72, -50, -21, 2, 16, 46, 76, 95, 111, 118, 119, 119, 119, 117, 110, 97, 75, 47, 18},
{ -84,-121,-128,-105, -51, 7, 38, 66, 93, 97, 93, 88, 89, 96, 102, 111, 116, 118, 118, 119, 118, 118, 117, 117, 118, 118, 117, 117, 117, 115, 85, -14}
{ 0, 0,-123,-123, -61, -23, 125, 107, 94, 83,-128,-128,-128, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0,-128,-128,-128, 0, 0, 0, 0, 0, 0},
{ 37, 16, 32, -21, 32, 52, 4, 4, 33, 18, 60, 56, 0, 8, 5, 16, 65, 19, 69, 16, -2, 19, 37, 16, 97, 19, 0, 87, 127, -3, 1, 2},
{ 0, 8, 1, 52, 4, 0, 0, 77, 81,-109, 47, 97, -83,-109, 38, 97, 0, 52, 4, 0, 1, 4, 1, 22, 2, -46, 33, 97, 0, 8, -85, -99},
{ 47, 97, 40, 97, -3, 25, 64, 17, 0, 52, 12, 5, 12, 5, 12, 5, 12, 5, 12, 5, 8, 4,-114, 19, 0, 52,-122, 21, 2, 5, 0, 8},
{ -52, -96,-118,-128,-111, -74, -37, -5, 31, 62, 89, 112, 127, 125, 115, 93, 57, 23, 0, -16, -8, 15, 37, 54, 65, 70, 62, 54, 43, 31, 19, 0},
{ -81,-128, -61, 13, 65, 93, 127, 47, 41, 44, 52, 55, 56, 58, 58, 34, 0, 68, 76, 72, 61, 108, 55, 29, 32, 39, 43, 49, 50, 51, 51, 0},
{ -21, -45, -67, -88,-105,-114,-122,-128,-123,-116,-103, -87, -70, -53, -28, -9, 22, 46, 67, 86, 102, 114, 123, 125, 127, 117, 104, 91, 72, 51, 28, 0},
{ -78,-118,-128,-102, -54, -3, 40, 65, 84, 88, 84, 80, 82, 88, 94, 103, 110, 119, 122, 125, 122, 122, 121, 123, 125, 126, 127, 127, 125, 118, 82, 0}
};