/// <summary>
/// Set output sound format
/// </summary>
/// <param name="ay">pointer to ayemu_t structure</param>
/// <param name="freq">sound freq (44100 for example)</param>
/// <param name="chans">number of channels (1-mono, 2-stereo)</param>
/// <param name="bits"> now supported only 16 and 8.</param>
/// <returns>
/// 1 on success, \b 0 if error occure
/// </returns>
public static int ayemu_set_sound_format(ayemu_ay_t ay, int freq, int chans, int bits)
{
if (!check_magic(ay))
{
return(0);
}
if (!(bits == 16 || bits == 8))
{
ayemu_err = "Incorrect bits value";
return(0);
}
else if (!(chans == 1 || chans == 2))
{
ayemu_err = "Incorrect number of channels";
return(0);
}
else if (freq < 50)
{
ayemu_err = "Incorrect output sound freq";
return(0);
}
else
{
ay.sndfmt.freq = freq;
ay.sndfmt.channels = chans;
ay.sndfmt.bpc = bits;
}
ay.default_sound_format_flag = 0;
ay.dirty = true;
return(1);
}
public static bool check_magic(ayemu_ay_t ay)
{
if (ay.magic == ayemu_ay_t.MAGIC1)
{
return(true);
}
return(false);
}
// Set chip frequency.
public static void ayemu_set_chip_freq(ayemu_ay_t ay, int chipfreq)
{
if (!check_magic(ay))
{
return;
}
ay.ChipFreq = chipfreq;
ay.dirty = true;
}
public static void set_table_ym(ayemu_ay_t ay, int[] tbl) //[32]
{
int n;
for (n = 0; n < 32; n++)
{
ay.table[n] = tbl[n];
}
ay.type = ayemu_chip_t.AYEMU_YM;
}
public static void set_table_ay(ayemu_ay_t ay, int[] tbl) //[16]
{
int n;
for (n = 0; n < 32; n++)
{
ay.table[n] = tbl[n / 2];
}
ay.type = ayemu_chip_t.AYEMU_AY;
}
public static void prepare_generation(ayemu_ay_t ay)
{
int vol, max_l, max_r;
if (!ay.dirty)
{
return;
}
if (!bEnvGenInit)
{
gen_env();
}
if ((ay.default_chip_flag) != 0)
{
ayemu_set_chip_type(ay, ayemu_chip_t.AYEMU_AY, null);
}
if ((ay.default_stereo_flag) != 0)
{
ayemu_set_stereo(ay, ayemu_stereo_t.AYEMU_ABC, null);
}
if ((ay.default_sound_format_flag) != 0)
{
ayemu_set_sound_format(ay, 44100, 2, 16);
}
ay.ChipTacts_per_outcount = ay.ChipFreq / ay.sndfmt.freq / 8;
{ // GenVols
int n, m;
int vol2;
for (n = 0; n < 32; n++)
{
vol2 = ay.table[n];
for (m = 0; m < 6; m++)
{
ay.vols[m][n] = (int)(((double)vol2 * ay.eq[m]) / 100);
}
}
}
/* ???????????? ????????? ??????????? ???????????? ????????
* ???????????????, ??? ? vols [x][31] ????? ????? ??????? ?????????
* TODO: ??????? ???????? ?? ??? ;-)
*/
max_l = ay.vols[0][31] + ay.vols[2][31] + ay.vols[4][31];
max_r = ay.vols[1][31] + ay.vols[3][31] + ay.vols[5][31];
vol = (max_l > max_r) ? max_l : max_r; // =157283 on all defaults
ay.Amp_Global = ay.ChipTacts_per_outcount * vol / AYEMU_MAX_AMP;
ay.dirty = false;
}
/// <summary>
/// retval ayemu_init none.
/// </summary>
/// <param name="ay"></param>
public static void ayemu_init(ayemu_ay_t ay)
{
ay.default_chip_flag = 1;
ay.ChipFreq = AYEMU_DEFAULT_CHIP_FREQ;
ay.default_stereo_flag = 1;
ay.default_sound_format_flag = 1;
ay.dirty = true;
ay.magic = ayemu_ay_t.MAGIC1;
ayemu_reset(ay);
}
/// <summary>
/// Set amplitude factor for each of channels (A,B anc C, tone and noise).
/// Factor's value must be from (-100) to 100.
/// </summary>
/// <param name="ay">pointer to ayemu_t structure</param>
/// <param name="stereo_type">type of stereo</param>
/// <param name="custom_eq">null or array with custom table of mixer layout.</param>
/// <returns>
/// 1 if OK, 0 if error occures.
/// </returns>
public static int ayemu_set_stereo(ayemu_ay_t ay, ayemu_stereo_t stereo_type, int[] custom_eq)
{
int i;
int chip;
if (!check_magic(ay))
{
return(0);
}
if (stereo_type != ayemu_stereo_t.AYEMU_STEREO_CUSTOM && custom_eq != null)
{
ayemu_err = "Stereo type not custom, 'custom_eq' parametr must be NULL";
return(0);
}
chip = (ay.type == ayemu_chip_t.AYEMU_AY) ? 0 : 1;
switch (stereo_type)
{
case ayemu_stereo_t.AYEMU_MONO:
case ayemu_stereo_t.AYEMU_ABC:
case ayemu_stereo_t.AYEMU_ACB:
case ayemu_stereo_t.AYEMU_BAC:
case ayemu_stereo_t.AYEMU_BCA:
case ayemu_stereo_t.AYEMU_CAB:
case ayemu_stereo_t.AYEMU_CBA:
for (i = 0; i < 6; i++)
{
ay.eq[i] = default_layout[chip][(int)stereo_type][i];
}
break;
case ayemu_stereo_t.AYEMU_STEREO_CUSTOM:
for (i = 0; i < 6; i++)
{
ay.eq[i] = custom_eq[i];
}
break;
default:
ayemu_err = "Incorrect stereo type";
return(0);
}
ay.default_stereo_flag = 0;
ay.dirty = true;
return(1);
}
public void InitAY(byte[] _pAYBuffer)
{
ay8912.init_ay8912();
// remember buffer
pAYBuffer = _pAYBuffer;
// init AY structure and reset virtual chip
AY = new ayemu_ay_t();
ay8912.ayemu_init(AY);
ay8912.ayemu_reset(AY);
// will create a 1248 buffer per frame (624 samples at 16bit)
int ret = ay8912.ayemu_set_sound_format(AY, 312 * 2 * 50, 2, 8);
}
/** Reset AY/YM chip.
*
* \arg \c ay - pointer to ayemu_ay_t structure.
* \return none.
*/
public static void ayemu_reset(ayemu_ay_t ay)
{
if (!check_magic(ay))
{
return;
}
ay.cnt_a = ay.cnt_b = ay.cnt_c = ay.cnt_n = ay.cnt_e = 0;
ay.bit_a = ay.bit_b = ay.bit_c = ay.bit_n = false;
ay.env_pos = ay.EnvNum = 0;
ay.Cur_Seed = 0xffff;
ay.regs.tone_a = ay.regs.tone_b = ay.regs.tone_c = 0;
ay.regs.noise = 0;
ay.regs.R7_tone_a = ay.regs.R7_tone_b = ay.regs.R7_tone_c = false;
ay.regs.R7_noise_a = ay.regs.R7_noise_b = ay.regs.R7_noise_c = false;
ay.regs.vol_a = ay.regs.vol_b = ay.regs.vol_c = 0;
ay.regs.env_a = ay.regs.env_b = ay.regs.env_c = false;
ay.regs.env_freq = ay.regs.env_style = 0;
}
/** Set chip type. */
public static int ayemu_set_chip_type(ayemu_ay_t ay, ayemu_chip_t type, int[] custom_table)
{
if (!check_magic(ay))
{
return(0);
}
if (!(type == ayemu_chip_t.AYEMU_AY_CUSTOM || type == ayemu_chip_t.AYEMU_YM_CUSTOM) && custom_table != null)
{
ayemu_err = "For non-custom chip type 'custom_table' param must be NULL";
return(0);
}
switch (type)
{
case ayemu_chip_t.AYEMU_AY:
case ayemu_chip_t.AYEMU_AY_LION17: set_table_ay(ay, Lion17_AY_table); break;
case ayemu_chip_t.AYEMU_YM:
case ayemu_chip_t.AYEMU_YM_LION17: set_table_ym(ay, Lion17_YM_table); break;
case ayemu_chip_t.AYEMU_AY_KAY: set_table_ay(ay, KAY_AY_table); break;
case ayemu_chip_t.AYEMU_YM_KAY: set_table_ym(ay, KAY_YM_table); break;
case ayemu_chip_t.AYEMU_AY_CUSTOM: set_table_ay(ay, custom_table); break;
case ayemu_chip_t.AYEMU_YM_CUSTOM: set_table_ym(ay, custom_table); break;
default:
ayemu_err = "Incorrect chip type";
return(0);
}
ay.default_chip_flag = 0;
ay.dirty = true;
return(1);
}
void ayemu_free(ayemu_ay_t ay)
{
//
return;
}
/// <summary>
/// Generate sound. Fill sound buffer with current register data
/// </summary>
/// <param name="ay">ay chip</param>
/// <param name="buff">8 bit buffer to fill - or null</param>
/// <param name="buff16">16 bit buffer to fill - or null</param>
/// <param name="frame_count">size of buffer</param>
public static int ayemu_gen_sound(ayemu_ay_t ay, byte[] buff, UInt16[] buff16, int frame_count, int _index)
{
int mix_l, mix_r;
int tmpvol;
int m;
byte[] char_buf = buff;
UInt16[] short_buf = buff16;
int buff_index = _index;
if (!check_magic(ay))
{
return(0);
}
prepare_generation(ay);
while (frame_count-- > 0)
{
mix_l = mix_r = 0;
for (m = 0; m < ay.ChipTacts_per_outcount; m++)
{
if (++ay.cnt_a >= ay.regs.tone_a)
{
ay.cnt_a = 0;
ay.bit_a = !ay.bit_a;
}
if (++ay.cnt_b >= ay.regs.tone_b)
{
ay.cnt_b = 0;
ay.bit_b = !ay.bit_b;
}
if (++ay.cnt_c >= ay.regs.tone_c)
{
ay.cnt_c = 0;
ay.bit_c = !ay.bit_c;
}
/* GenNoise (c) Hacker KAY & Sergey Bulba */
if (++ay.cnt_n >= (ay.regs.noise * 2))
{
ay.cnt_n = 0;
ay.Cur_Seed = (ay.Cur_Seed * 2 + 1) ^ (((ay.Cur_Seed >> 16) ^ (ay.Cur_Seed >> 13)) & 1);
ay.bit_n = false;
if (((ay.Cur_Seed >> 16) & 1) != 0)
{
ay.bit_n = true;
}
}
if (++ay.cnt_e >= ay.regs.env_freq)
{
ay.cnt_e = 0;
if (++ay.env_pos > 127)
{
ay.env_pos = 64;
}
}
//#define ENVVOL Envelope[ay.regs.env_style][ay.env_pos]
if ((ay.bit_a | !ay.regs.R7_tone_a) & (ay.bit_n | !ay.regs.R7_noise_a))
{
tmpvol = (ay.regs.env_a) ? Envelope[ay.regs.env_style][ay.env_pos] : ay.regs.vol_a * 2 + 1;
mix_l += ay.vols[0][tmpvol];
mix_r += ay.vols[1][tmpvol];
}
if ((ay.bit_b | !ay.regs.R7_tone_b) & (ay.bit_n | !ay.regs.R7_noise_b))
{
tmpvol = (ay.regs.env_b) ? Envelope[ay.regs.env_style][ay.env_pos] : ay.regs.vol_b * 2 + 1;
mix_l += ay.vols[2][tmpvol];
mix_r += ay.vols[3][tmpvol];
}
if ((ay.bit_c | !ay.regs.R7_tone_c) & (ay.bit_n | !ay.regs.R7_noise_c))
{
tmpvol = (ay.regs.env_c) ? Envelope[ay.regs.env_style][ay.env_pos] : ay.regs.vol_c * 2 + 1;
mix_l += ay.vols[4][tmpvol];
mix_r += ay.vols[5][tmpvol];
}
} /* end for (m=0; ...) */
mix_l /= ay.Amp_Global;
mix_r /= ay.Amp_Global;
if (ay.sndfmt.bpc == 8)
{
mix_l = (mix_l >> 8); // | 128; /* 8 bit sound */
mix_r = (mix_r >> 8); // | 128;
char_buf[_index++] = (byte)mix_l;
if (ay.sndfmt.channels != 1)
{
char_buf[_index++] = (byte)mix_r;
}
}
else
{
short_buf[_index++] = (UInt16)mix_l; /* 16 bit sound */
if (ay.sndfmt.channels != 1)
{
short_buf[_index++] = (UInt16)mix_r;
}
}
}
return(buff_index);
}
/** Assign values for AY registers.
*
* You must pass array of char [14] to this function
*/
/*
* void ayemu_set_regs(ayemu_ay_t ay, unsigned char* regs)
* {
* if (!check_magic(ay)) return;
*
* // WARN_IF_REGISTER_GREAT_THAN(1, 15);
* // WARN_IF_REGISTER_GREAT_THAN(3, 15);
* // WARN_IF_REGISTER_GREAT_THAN(5, 15);
* // WARN_IF_REGISTER_GREAT_THAN(8, 31);
* // WARN_IF_REGISTER_GREAT_THAN(9, 31);
* // WARN_IF_REGISTER_GREAT_THAN(10, 31);
*
* ay.regs.tone_a = regs[0] + ((regs[1] & 0x0f) << 8);
* ay.regs.tone_b = regs[2] + ((regs[3] & 0x0f) << 8);
* ay.regs.tone_c = regs[4] + ((regs[5] & 0x0f) << 8);
*
* ay.regs.noise = regs[6] & 0x1f;
*
* ay.regs.R7_tone_a = !(regs[7] & 0x01);
* ay.regs.R7_tone_b = !(regs[7] & 0x02);
* ay.regs.R7_tone_c = !(regs[7] & 0x04);
*
* ay.regs.R7_noise_a = !(regs[7] & 0x08);
* ay.regs.R7_noise_b = !(regs[7] & 0x10);
* ay.regs.R7_noise_c = !(regs[7] & 0x20);
*
* ay.regs.vol_a = regs[8] & 0x0f;
* ay.regs.vol_b = regs[9] & 0x0f;
* ay.regs.vol_c = regs[10] & 0x0f;
* ay.regs.env_a = regs[8] & 0x10;
* ay.regs.env_b = regs[9] & 0x10;
* ay.regs.env_c = regs[10] & 0x10;
* ay.regs.env_freq = regs[11] + (regs[12] << 8);
*
* if (regs[13] != 0xff)
* { // R13 = 255 means continue curent envelop
* ay.regs.env_style = regs[13] & 0x0f;
* ay.env_pos = ay.cnt_e = 0;
* }
* }
*/
/** Assign value for a single AY register.
*/
public static void ayemu_set_reg(ayemu_ay_t ay, int reg, byte value)
{
if (!check_magic(ay))
{
return;
}
switch (reg)
{
case 0:
ay.regs.tone_a = (ay.regs.tone_a & 0x0f00) | value;
break;
case 1:
ay.regs.tone_a = (ay.regs.tone_a & 0x00ff) | ((value & 0x0f) << 8);
break;
case 2:
ay.regs.tone_b = (ay.regs.tone_b & 0x0f00) | value;
break;
case 3:
ay.regs.tone_b = (ay.regs.tone_b & 0x00ff) | ((value & 0x0f) << 8);
break;
case 4:
ay.regs.tone_c = (ay.regs.tone_c & 0x0f00) | value;
break;
case 5:
ay.regs.tone_c = (ay.regs.tone_c & 0x00ff) | ((value & 0x0f) << 8);
break;
case 6:
ay.regs.noise = value & 0x1f;
break;
case 7:
ay.regs.R7_tone_a = !((value & 0x01) != 0);
ay.regs.R7_tone_b = !((value & 0x02) != 0);
ay.regs.R7_tone_c = !((value & 0x04) != 0);
ay.regs.R7_noise_a = !((value & 0x08) != 0);
ay.regs.R7_noise_b = !((value & 0x10) != 0);
ay.regs.R7_noise_c = !((value & 0x20) != 0);
break;
case 8:
ay.regs.vol_a = value & 0x0f;
ay.regs.env_a = false;
if ((value & 0x10) != 0)
{
ay.regs.env_a = true;
}
break;
case 9:
ay.regs.vol_b = value & 0x0f;
ay.regs.env_b = false;
if ((value & 0x10) != 0)
{
ay.regs.env_b = true;
}
break;
case 10:
ay.regs.vol_c = value & 0x0f;
ay.regs.env_c = false;
if ((value & 0x10) != 0)
{
ay.regs.env_c = true;
}
break;
case 11:
ay.regs.env_freq = (ay.regs.env_freq & 0xff00) | value;
break;
case 12:
ay.regs.env_freq = (ay.regs.env_freq & 0x00ff) | (value << 8);
break;
case 13:
ay.regs.env_style = value & 0x0f;
ay.env_pos = ay.cnt_e = 0;
break;
}
}