DISTRHO
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DPF
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Write some API documentation; Cleanup

gh-pages
falkTX 10 years ago
parent
4102259517
commit
f3b8ec198b
3 changed files with 333 additions and 82 deletions
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  1. +327
    -81
      distrho/DistrhoPlugin.hpp
  2. +5
    -0
      distrho/DistrhoUI.hpp
  3. +1
    -1
      distrho/src/DistrhoPluginChecks.h

+ 327
- 81
distrho/DistrhoPlugin.hpp View File

@@ -34,63 +34,114 @@

START_NAMESPACE_DISTRHO

// -----------------------------------------------------------------------
// Parameter Hints
/* ------------------------------------------------------------------------------------------------------------
* Parameter Hints */

const uint32_t PARAMETER_IS_AUTOMABLE = 1 << 0;
const uint32_t PARAMETER_IS_BOOLEAN = 1 << 1;
const uint32_t PARAMETER_IS_INTEGER = 1 << 2;
const uint32_t PARAMETER_IS_LOGARITHMIC = 1 << 3;
const uint32_t PARAMETER_IS_OUTPUT = 1 << 4;
/**
@defgroup ParameterHints Parameter Hints

// -----------------------------------------------------------------------
// Parameter Ranges
Various parameter hints.
@see Parameter::hints
@{
*/

/**
Parameter is automable (real-time safe).
@see Plugin::d_setParameterValue()
*/
static const uint32_t kParameterIsAutomable = 0x01;

/**
Parameter value is boolean.
It's always at either minimum or maximum value.
*/
static const uint32_t kParameterIsBoolean = 0x02;

/**
Parameter value is integer.
*/
static const uint32_t kParameterIsInteger = 0x04;

/**
Parameter value is logarithmic.
*/
static const uint32_t kParameterIsLogarithmic = 0x08;

/**
Parameter is of output type.
When unset, parameter is assumed to be of input type.

Parameter inputs are changed by the host and must not be changed by the plugin.
The only exception being when changing programs, see Plugin::d_setProgram().
Outputs are changed by the plugin and never modified by the host.
*/
static const uint32_t kParameterIsOutput = 0x10;

/** @} */

/* ------------------------------------------------------------------------------------------------------------
* DPF Base structs */

/**
Parameter ranges.
This is used to set the default, minimum and maximum values of a parameter.

By default a parameter has 0.0 as minimum, 1.0 as maximum and 0.0 as default.
When changing this struct values you must ensure maximum > minimum and default is within range.
*/
struct ParameterRanges {
/**
Default value.
*/
float def;

/**
Minimum value.
*/
float min;

/**
Maximum value.
*/
float max;

/**
Default constructor.
*/
ParameterRanges() noexcept
: def(0.0f),
min(0.0f),
max(1.0f) {}

ParameterRanges(float def, float min, float max) noexcept
{
this->def = def;
this->min = min;
this->max = max;
}

void clear() noexcept
{
def = 0.0f;
min = 0.0f;
max = 1.0f;
}
/**
Constructor using custom values.
*/
ParameterRanges(const float df, const float mn, const float mx) noexcept
: def(df),
min(mn),
max(mx) {}

/*!
* Fix default value within range.
/**
Fix the default value within range.
*/
void fixDefault() noexcept
{
fixValue(def);
}

/*!
* Fix a value within range.
/**
Fix a value within range.
*/
void fixValue(float& value) const noexcept
{
if (value <= min)
if (value < min)
value = min;
else if (value > max)
value = max;
}

/*!
* Get a fixed value within range.
/**
Get a fixed value within range.
*/
const float& getFixedValue(const float& value) const noexcept
{
@@ -101,8 +152,8 @@ struct ParameterRanges {
return value;
}

/*!
* Get a value normalized to 0.0<->1.0.
/**
Get a value normalized to 0.0<->1.0.
*/
float getNormalizedValue(const float& value) const noexcept
{
@@ -115,8 +166,8 @@ struct ParameterRanges {
return normValue;
}

/*!
* Get a value normalized to 0.0<->1.0, fixed within range.
/**
Get a value normalized to 0.0<->1.0, fixed within range.
*/
float getFixedAndNormalizedValue(const float& value) const noexcept
{
@@ -135,8 +186,8 @@ struct ParameterRanges {
return normValue;
}

/*!
* Get a proper value previously normalized to 0.0<->1.0.
/**
Get a proper value previously normalized to 0.0<->1.0.
*/
float getUnnormalizedValue(const float& value) const noexcept
{
@@ -149,70 +200,160 @@ struct ParameterRanges {
}
};

// -----------------------------------------------------------------------
// Parameter
/**
Parameter.
*/
struct Parameter {
/**
Hints describing this parameter.
@see ParameterHints
*/
uint32_t hints;

/**
The name of this parameter.
A parameter name can contain any characters, but hosts might have a hard time with non-ascii ones.
The name doesn't have to be unique within a plugin instance, but it's recommended.
*/
d_string name;

/**
The symbol of this parameter.
A parameter symbol is a short restricted name used as a machine and human readable identifier.
The first character must be one of _, a-z or A-Z and subsequent characters can be from _, a-z, A-Z and 0-9.
@note: Parameter symbols MUST be unique within a plugin instance.
*/
d_string symbol;

/**
The unit of this parameter.
This means something like "dB", "kHz" and "ms".
Can be left blank if units do not apply to this parameter.
*/
d_string unit;

/**
Ranges of this parameter.
The ranges describe the default, minimum and maximum values.
*/
ParameterRanges ranges;

/**
Default constructor for a null parameter.
*/
Parameter() noexcept
: hints(0x0) {}

void clear() noexcept
{
hints = 0x0;
name = "";
symbol = "";
unit = "";
ranges.clear();
}
: hints(0x0),
name(),
symbol(),
unit(),
ranges() {}
};

// -----------------------------------------------------------------------
// MidiEvent
/**
MIDI event.
*/
struct MidiEvent {
/**
Size of internal data.
*/
static const uint32_t kDataSize = 4;

/**
Time offset in frames.
*/
uint32_t frame;
uint8_t size;
uint8_t buf[4];

void clear() noexcept
{
frame = 0;
size = 0;
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
}
};
/**
Number of bytes used.
*/
uint32_t size;

// -----------------------------------------------------------------------
// TimePos
/**
MIDI data.
If size > kDataSize, dataExt is used (otherwise null).
*/
uint8_t data[kDataSize];
const uint8_t* dataExt;
};

struct TimePos {
/**
Time position.
This struct is inspired by the JACK API.
The @a playing and @a frame values are always valid.
BBT values are only valid when @a bbt.valid is true.
*/
struct TimePosition {
/**
Wherever the host transport is playing/rolling.
*/
bool playing;

/**
Current host transport position in frames.
*/
uint64_t frame;

struct BeatBarTick {
/**
Bar-Beat-Tick time position.
*/
struct BarBeatTick {
/**
Wherever the host transport is using BBT.
If false you must not read from this struct.
*/
bool valid;

int32_t bar; /*!< current bar */
int32_t beat; /*!< current beat-within-bar */
int32_t tick; /*!< current tick-within-beat */
/**
Current bar.
Should always be > 0.
The first bar is bar '1'.
*/
int32_t bar;

/**
Current beat within bar.
Should always be > 0 and <= @a beatsPerBar.
The first beat is beat '1'.
*/
int32_t beat;

/**
Current tick within beat.
Should always be > 0 and <= @a ticksPerBeat.
The first tick is tick '0'.
*/
int32_t tick;

/**
Number of ticks that have elapsed between frame 0 and the first beat of the current measure.
*/
double barStartTick;

float beatsPerBar; /*!< time signature "numerator" */
float beatType; /*!< time signature "denominator" */
/**
Time signature "numerator".
*/
float beatsPerBar;

/**
Time signature "denominator".
*/
float beatType;

/**
Number of ticks within a bar.
Usually a moderately large integer with many denominators, such as 1920.0.
*/
double ticksPerBeat;

/**
Number of beats per minute.
*/
double beatsPerMinute;

BeatBarTick() noexcept
/**
Default constructor for a null BBT time position.
*/
BarBeatTick() noexcept
: valid(false),
bar(0),
beat(0),
@@ -224,29 +365,61 @@ struct TimePos {
beatsPerMinute(0.0) {}
} bbt;

TimePos() noexcept
/**
Default constructor for a time position.
*/
TimePosition() noexcept
: playing(false),
frame(0) {}
frame(0),
bbt() {}
};

// -----------------------------------------------------------------------
// Plugin
/* ------------------------------------------------------------------------------------------------------------
* DPF Plugin */

/**
TODO.
*/
class Plugin
{
public:
Plugin(uint32_t parameterCount, uint32_t programCount, uint32_t stateCount);
/**
TODO.
*/
Plugin(const uint32_t parameterCount, const uint32_t programCount, const uint32_t stateCount);

/**
Destructor.
*/
virtual ~Plugin();

// -------------------------------------------------------------------
// Host state

/**
TODO.
*/
uint32_t d_getBufferSize() const noexcept;

/**
TODO.
*/
double d_getSampleRate() const noexcept;

/**
TODO.
*/
#if DISTRHO_PLUGIN_WANT_TIMEPOS
/**
TODO.
*/
const TimePos& d_getTimePos() const noexcept;
#endif

#if DISTRHO_PLUGIN_WANT_LATENCY
/**
TODO.
*/
void d_setLatency(uint32_t frames) noexcept;
#endif

@@ -254,51 +427,121 @@ protected:
// -------------------------------------------------------------------
// Information

/**
TODO.
*/
virtual const char* d_getName() const noexcept { return DISTRHO_PLUGIN_NAME; }

/**
TODO.
*/
virtual const char* d_getLabel() const noexcept = 0;

/**
TODO.
*/
virtual const char* d_getMaker() const noexcept = 0;

/**
TODO.
*/
virtual const char* d_getLicense() const noexcept = 0;

/**
TODO.
*/
virtual uint32_t d_getVersion() const noexcept = 0;

/**
TODO.
*/
virtual long d_getUniqueId() const noexcept = 0;

// -------------------------------------------------------------------
// Init

/**
TODO.
*/
virtual void d_initParameter(uint32_t index, Parameter& parameter) = 0;

#if DISTRHO_PLUGIN_WANT_PROGRAMS
/**
TODO.
*/
virtual void d_initProgramName(uint32_t index, d_string& programName) = 0;
#endif

#if DISTRHO_PLUGIN_WANT_STATE
/**
TODO.
*/
virtual void d_initStateKey(uint32_t index, d_string& stateKey) = 0;
#endif

// -------------------------------------------------------------------
// Internal data

/**
TODO.
*/
virtual float d_getParameterValue(uint32_t index) const = 0;

/**
TODO.
*/
virtual void d_setParameterValue(uint32_t index, float value) = 0;

#if DISTRHO_PLUGIN_WANT_PROGRAMS
/**
TODO.
*/
virtual void d_setProgram(uint32_t index) = 0;
#endif

#if DISTRHO_PLUGIN_WANT_STATE
/**
TODO.
*/
virtual void d_setState(const char* key, const char* value) = 0;
#endif

// -------------------------------------------------------------------
// Process

/**
TODO.
*/
virtual void d_activate() {}

/**
TODO.
*/
virtual void d_deactivate() {}

#if DISTRHO_PLUGIN_IS_SYNTH
/**
TODO.
*/
virtual void d_run(const float** inputs, float** outputs, uint32_t frames, const MidiEvent* midiEvents, uint32_t midiEventCount) = 0;
#else
/**
TODO.
*/
virtual void d_run(const float** inputs, float** outputs, uint32_t frames) = 0;
#endif

// -------------------------------------------------------------------
// Callbacks (optional)

/**
TODO.
*/
virtual void d_bufferSizeChanged(uint32_t newBufferSize);

/**
TODO.
*/
virtual void d_sampleRateChanged(double newSampleRate);

// -------------------------------------------------------------------
@@ -311,12 +554,15 @@ private:
DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(Plugin)
};

// -----------------------------------------------------------------------
// Create plugin, entry point
/* ------------------------------------------------------------------------------------------------------------
* Create plugin, entry point */

/**
TODO.
*/
extern Plugin* createPlugin();

// -----------------------------------------------------------------------
/* ------------------------------------------------------------------------------------------------------------ */

END_NAMESPACE_DISTRHO



+ 5
- 0
distrho/DistrhoUI.hpp View File

@@ -84,6 +84,11 @@ protected:
virtual void d_stateChanged(const char* key, const char* value) = 0;
#endif

// -------------------------------------------------------------------
// DSP Callbacks (optional)

virtual void d_sampleRateChanged(double newSampleRate);

// -------------------------------------------------------------------
// UI Callbacks (optional)



+ 1
- 1
distrho/src/DistrhoPluginChecks.h View File

@@ -60,7 +60,7 @@
#endif

#ifndef DISTRHO_PLUGIN_IS_RT_SAFE
# define DISTRHO_PLUGIN_IS_RT_SAFE 1
# define DISTRHO_PLUGIN_IS_RT_SAFE 0
#endif

#ifndef DISTRHO_UI_USE_NANOVG


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