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big ALSA LADSPA plugin rewrite for multiple channel LADSPA plugins
This is major rewrite of the LADSPA plugin to satisfy requirements for the LADSPA plugins with multiple audio inputs and / or outputs.
This commit is contained in:
Jaroslav Kysela
parent
01892b78fa
commit
1f231e2e1a
2 changed files with 763 additions and 288 deletions
127
src/pcm/ladspa.h
127
src/pcm/ladspa.h
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@ -1,7 +1,7 @@
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/* ladspa.h
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Linux Audio Developer's Simple Plugin API Version 1.0[LGPL].
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Copyright (C) 2000-2001 Richard W.E. Furse, Paul Barton-Davis,
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Linux Audio Developer's Simple Plugin API Version 1.1[LGPL].
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Copyright (C) 2000-2002 Richard W.E. Furse, Paul Barton-Davis,
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Stefan Westerfeld.
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This library is free software; you can redistribute it and/or
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@ -22,6 +22,10 @@
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#ifndef LADSPA_INCLUDED
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#define LADSPA_INCLUDED
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#define LADSPA_VERSION "1.1"
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#define LADSPA_VERSION_MAJOR 1
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#define LADSPA_VERSION_MINOR 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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@ -72,7 +76,10 @@ extern "C" {
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/* Fundamental data type passed in and out of plugin. This data type
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is used to communicate audio samples and control values. It is
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assumed that the plugin will work sensibly given any numeric input
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value although it may have a preferred range (see hints below). */
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value although it may have a preferred range (see hints below).
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For audio it is generally assumed that 1.0f is the `0dB' reference
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amplitude and is a `normal' signal level. */
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typedef float LADSPA_Data;
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@ -198,7 +205,7 @@ typedef int LADSPA_PortRangeHintDescriptor;
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bound of the valid range. If LADSPA_HINT_SAMPLE_RATE is also
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specified then the value of LowerBound should be multiplied by the
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sample rate. */
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#define LADSPA_HINT_BOUNDED_BELOW 0x1
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#define LADSPA_HINT_BOUNDED_BELOW 0x1
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/* Hint LADSPA_HINT_BOUNDED_ABOVE indicates that the UpperBound field
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of the LADSPA_PortRangeHint should be considered meaningful. The
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@ -206,14 +213,15 @@ typedef int LADSPA_PortRangeHintDescriptor;
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bound of the valid range. If LADSPA_HINT_SAMPLE_RATE is also
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specified then the value of UpperBound should be multiplied by the
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sample rate. */
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#define LADSPA_HINT_BOUNDED_ABOVE 0x2
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#define LADSPA_HINT_BOUNDED_ABOVE 0x2
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/* Hint LADSPA_HINT_TOGGLED indicates that the data item should be
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considered a Boolean toggle. Data less than or equal to zero should
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be considered `off' or `false,' and data above zero should be
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considered `on' or `true.' LADSPA_HINT_TOGGLED may not be used in
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conjunction with any other hint. */
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#define LADSPA_HINT_TOGGLED 0x4
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conjunction with any other hint except LADSPA_HINT_DEFAULT_0 or
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LADSPA_HINT_DEFAULT_1. */
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#define LADSPA_HINT_TOGGLED 0x4
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/* Hint LADSPA_HINT_SAMPLE_RATE indicates that any bounds specified
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should be interpreted as multiples of the sample rate. For
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@ -221,12 +229,12 @@ typedef int LADSPA_PortRangeHintDescriptor;
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the sample rate) could be requested by this hint in conjunction
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with LowerBound = 0 and UpperBound = 0.5. Hosts that support bounds
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at all must support this hint to retain meaning. */
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#define LADSPA_HINT_SAMPLE_RATE 0x8
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#define LADSPA_HINT_SAMPLE_RATE 0x8
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/* Hint LADSPA_HINT_LOGARITHMIC indicates that it is likely that the
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user will find it more intuitive to view values using a logarithmic
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scale. This is particularly useful for frequencies and gains. */
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#define LADSPA_HINT_LOGARITHMIC 0x10
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#define LADSPA_HINT_LOGARITHMIC 0x10
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/* Hint LADSPA_HINT_INTEGER indicates that a user interface would
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probably wish to provide a stepped control taking only integer
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@ -234,14 +242,97 @@ typedef int LADSPA_PortRangeHintDescriptor;
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integer range required to avoid floating point rounding errors. For
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instance, the integer set {0,1,2,3} might be described as [-0.1,
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3.1]. */
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#define LADSPA_HINT_INTEGER 0x20
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#define LADSPA_HINT_INTEGER 0x20
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#define LADSPA_IS_HINT_BOUNDED_BELOW(x) ((x) & LADSPA_HINT_BOUNDED_BELOW)
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#define LADSPA_IS_HINT_BOUNDED_ABOVE(x) ((x) & LADSPA_HINT_BOUNDED_ABOVE)
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#define LADSPA_IS_HINT_TOGGLED(x) ((x) & LADSPA_HINT_TOGGLED)
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#define LADSPA_IS_HINT_SAMPLE_RATE(x) ((x) & LADSPA_HINT_SAMPLE_RATE)
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#define LADSPA_IS_HINT_LOGARITHMIC(x) ((x) & LADSPA_HINT_LOGARITHMIC)
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#define LADSPA_IS_HINT_INTEGER(x) ((x) & LADSPA_HINT_INTEGER)
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/* The various LADSPA_HINT_HAS_DEFAULT_* hints indicate a `normal'
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value for the port that is sensible as a default. For instance,
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this value is suitable for use as an initial value in a user
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interface or as a value the host might assign to a control port
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when the user has not provided one. Defaults are encoded using a
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mask so only one default may be specified for a port. Some of the
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hints make use of lower and upper bounds, in which case the
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relevant bound or bounds must be available and
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LADSPA_HINT_SAMPLE_RATE must be applied as usual. The resulting
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default must be rounded if LADSPA_HINT_INTEGER is present. Default
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values were introduced in LADSPA v1.1. */
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#define LADSPA_HINT_DEFAULT_MASK 0x3C0
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/* This default values indicates that no default is provided. */
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#define LADSPA_HINT_DEFAULT_NONE 0x0
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/* This default hint indicates that the suggested lower bound for the
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port should be used. */
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#define LADSPA_HINT_DEFAULT_MINIMUM 0x40
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/* This default hint indicates that a low value between the suggested
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lower and upper bounds should be chosen. For ports with
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LADSPA_HINT_LOGARITHMIC, this should be exp(log(lower) * 0.75 +
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log(upper) * 0.25). Otherwise, this should be (lower * 0.75 + upper
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* 0.25). */
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#define LADSPA_HINT_DEFAULT_LOW 0x80
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/* This default hint indicates that a middle value between the
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suggested lower and upper bounds should be chosen. For ports with
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LADSPA_HINT_LOGARITHMIC, this should be exp(log(lower) * 0.5 +
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log(upper) * 0.5). Otherwise, this should be (lower * 0.5 + upper *
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0.5). */
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#define LADSPA_HINT_DEFAULT_MIDDLE 0xC0
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/* This default hint indicates that a high value between the suggested
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lower and upper bounds should be chosen. For ports with
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LADSPA_HINT_LOGARITHMIC, this should be exp(log(lower) * 0.25 +
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log(upper) * 0.75). Otherwise, this should be (lower * 0.25 + upper
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* 0.75). */
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#define LADSPA_HINT_DEFAULT_HIGH 0x100
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/* This default hint indicates that the suggested upper bound for the
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port should be used. */
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#define LADSPA_HINT_DEFAULT_MAXIMUM 0x140
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/* This default hint indicates that the number 0 should be used. Note
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that this default may be used in conjunction with
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LADSPA_HINT_TOGGLED. */
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#define LADSPA_HINT_DEFAULT_0 0x200
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/* This default hint indicates that the number 1 should be used. Note
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that this default may be used in conjunction with
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LADSPA_HINT_TOGGLED. */
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#define LADSPA_HINT_DEFAULT_1 0x240
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/* This default hint indicates that the number 100 should be used. */
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#define LADSPA_HINT_DEFAULT_100 0x280
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/* This default hint indicates that the Hz frequency of `concert A'
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should be used. This will be 440 unless the host uses an unusual
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tuning convention, in which case it may be within a few Hz. */
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#define LADSPA_HINT_DEFAULT_440 0x2C0
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#define LADSPA_IS_HINT_BOUNDED_BELOW(x) ((x) & LADSPA_HINT_BOUNDED_BELOW)
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#define LADSPA_IS_HINT_BOUNDED_ABOVE(x) ((x) & LADSPA_HINT_BOUNDED_ABOVE)
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#define LADSPA_IS_HINT_TOGGLED(x) ((x) & LADSPA_HINT_TOGGLED)
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#define LADSPA_IS_HINT_SAMPLE_RATE(x) ((x) & LADSPA_HINT_SAMPLE_RATE)
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#define LADSPA_IS_HINT_LOGARITHMIC(x) ((x) & LADSPA_HINT_LOGARITHMIC)
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#define LADSPA_IS_HINT_INTEGER(x) ((x) & LADSPA_HINT_INTEGER)
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#define LADSPA_IS_HINT_HAS_DEFAULT(x) ((x) & LADSPA_HINT_DEFAULT_MASK)
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#define LADSPA_IS_HINT_DEFAULT_MINIMUM(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_MINIMUM)
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#define LADSPA_IS_HINT_DEFAULT_LOW(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_LOW)
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#define LADSPA_IS_HINT_DEFAULT_MIDDLE(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_MIDDLE)
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#define LADSPA_IS_HINT_DEFAULT_HIGH(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_HIGH)
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#define LADSPA_IS_HINT_DEFAULT_MAXIMUM(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_MAXIMUM)
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#define LADSPA_IS_HINT_DEFAULT_0(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_0)
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#define LADSPA_IS_HINT_DEFAULT_1(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_1)
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#define LADSPA_IS_HINT_DEFAULT_100(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_100)
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#define LADSPA_IS_HINT_DEFAULT_440(x) (((x) & LADSPA_HINT_DEFAULT_MASK) \
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== LADSPA_HINT_DEFAULT_440)
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typedef struct _LADSPA_PortRangeHint {
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@ -428,7 +519,7 @@ typedef struct _LADSPA_Descriptor {
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this function pointer must be set to NULL. When it is provided,
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the function set_run_adding_gain() must be provided also. */
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void (*run_adding)(LADSPA_Handle Instance,
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unsigned long SampleCount);
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unsigned long SampleCount);
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/* This method is a function pointer that sets the output gain for
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use when run_adding() is called (see above). If this function is
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run_adding() function is provided. When it is absent this
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function pointer must be set to NULL. */
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void (*set_run_adding_gain)(LADSPA_Handle Instance,
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LADSPA_Data Gain);
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LADSPA_Data Gain);
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/* This is the counterpart to activate() (see above). If there is
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nothing for deactivate() to do then the plugin writer may provide
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