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12bitplayback.axo
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12bitplayback.axo
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<objdefs appVersion="1.0.12">
<obj.normal id="12bitplayback" uuid="8bb6e66f-2394-4a7c-8e0f-9081479106bb">
<license>GPL</license>
<inlets>
<frac32 name="samplerate"/>
<frac32 name="note"/>
<bool32.risingfalling name="gate2"/>
<frac32 name="velocity"/>
<bool32 name="arm"/>
<int32 name="channel"/>
<frac32 name="adsr"/>
<frac32 name="pitch"/>
<bool32 name="pitchtrig"/>
<frac32 name="start"/>
<bool32 name="starttrig"/>
<frac32 name="end"/>
<bool32 name="endtrig"/>
</inlets>
<outlets>
<frac32buffer name="l"/>
<frac32buffer name="r"/>
</outlets>
<displays/>
<params/>
<attribs>
<objref name="data"/>
</attribs>
<code.declaration><![CDATA[static inline int16_t signextend4(const int16_t x)
{
struct {int16_t x:4;} s;
return s.x = x;
}
struct Frame
{
int8_t data[3];
Frame() : Frame(0, 0) {}
Frame(int16_t l_, int16_t r_)
{
data[0] = data[1] = data[2] = 0;
l(l_);
r(r_);
}
int16_t l()
{
return ((int16_t)data[0] << 4 & 0xFFF0) | ((int16_t)data[1] >> 4 & 0x00F);
}
void l(int16_t x)
{
data[0] = x >> 4;
data[1] = (data[1] & 0x0F) | (x << 4 & 0xF0);
}
int16_t r()
{
return (signextend4(data[1] & 0x0F) << 8 & 0xFF00) | ((int16_t)data[2] & 0x00FF);
}
void r(int16_t x)
{
data[1] = (data[1] & 0xF0) | (x >> 8 & 0x0F);
data[2] = x;
}
};
struct SampleData
{
int8_t note;
uint8_t velocity;
uint8_t channel;
Frame *start;
int32_t length;
int32_t loop_start;
int32_t loop_end;
int32_t pitch;
int32_t samplerate;
};
struct PlaybackInfo
{
SampleData *data;
int32_t play_pos;
bool forwards;
};
// 2.48847926267 samples at 48000khz per sample at 19288.88khz
uint64_t phase = 0;
Frame last_frame;
PlaybackInfo info;
bool note_not_found = false;
int tick = 0;
bool last_gate = false;]]></code.declaration>
<code.krate><![CDATA[int32_t freq = 0;
int32_t note_difference;
if (info.data)
{
//if (inlet_starttrig)
{
info.data->loop_start = q27_to_float(inlet_start) * info.data->length;
}
//if (inlet_endtrig)
{
info.data->loop_end = q27_to_float(inlet_end) * info.data->length;
}
//if (inlet_pitchtrig)
{
info.data->pitch = inlet_pitch;
}
note_difference = inlet_note - (info.data->note << 20) + info.data->pitch;
MTOFEXTENDED(info.data->samplerate + 0xFA000000 + note_difference, freq);
//++tick;
if (tick > 1000)
{
LogTextMessage("note difference(%d) note(%d)", note_difference >> 20, inlet_note >> 20);
tick = 0;
}
}
//MTOsFasdfEXTENDED(inlet_note, freq);
//MTOFEXTENDED(inlet_samplerate, freq);
if (!inlet_gate2)
{
note_not_found = false;
}
if (!inlet_adsr) // the envelope is dead
{
info.data = nullptr;
last_frame = Frame(0, 0);
}
if (inlet_gate2 && !last_gate && !inlet_arm && !note_not_found)
{
SampleData *i = reinterpret_cast<SampleData *>(attr_data.array);
SampleData *best = i;
int32_t count = 0;
while (i->length)
{
int8_t nn = inlet_note >> 20;
if (i->length > 1 && i->channel == inlet_channel)
{
if (best->length == 1 || abs(i->note - nn) < abs(best->note - nn))
{
best = i;
}
}
i++;
count++;
}
if (best->length > 1)
{
info.data = best;
info.play_pos = 0;
last_frame = Frame(0, 0);
info.forwards = true;
LogTextMessage("found sample(%x), note(%d), length(%d)", info.data, info.data->note, info.data->length);
}
else
{
note_not_found = true;
LogTextMessage("note not found (%d tries)", count);
}
}
last_gate = inlet_gate2;
for (int j = 0; j < BUFSIZE; j++) {
if (info.data)
{
phase += (uint64_t)freq << 6;
while (phase >= (uint64_t)(1) << 32) {
phase -= (uint64_t)(1) << 32;
if (info.forwards) ++info.play_pos;
else --info.play_pos;
}
if (info.data->loop_start > info.data->loop_end) // ping pong
{
if (info.play_pos > info.data->loop_start)
{
info.forwards = false;
info.play_pos = info.data->loop_start;
}
if (info.play_pos <= info.data->loop_end)
{
info.forwards = true;
info.play_pos = info.data->loop_end;
}
}
else if (!info.forwards)
{
info.forwards = true;
}
else if (info.play_pos > info.data->loop_end)
{
info.play_pos = info.data->loop_start;
}
last_frame = *(info.data->start + info.play_pos);
}
outlet_l[j] = last_frame.l() << 16;
outlet_r[j] = last_frame.r() << 16;
}]]></code.krate>
</obj.normal>
</objdefs>