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Author SHA1 Message Date
Christopher Arndt 5d41cf4c53 Add stub readme and license file
Signed-off-by: Christopher Arndt <chris@chrisarndt.de>
2024-04-20 02:54:56 +02:00
Christopher Arndt 2f00720d2b Add nimble tasks and example 'amp' plugin
Signed-off-by: Christopher Arndt <chris@chrisarndt.de>
2024-04-20 02:50:10 +02:00
1 changed files with 38 additions and 38 deletions

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@ -4,62 +4,62 @@ import nymph
const PluginUri = "urn:nymph:examples:amp" const PluginUri = "urn:nymph:examples:amp"
type type
CSample = cfloat CSample = cfloat
CSamples = UncheckedArray[CSample] CSamples = UncheckedArray[CSample]
PortIndex = enum PortIndex = enum
INPUT = 0, INPUT = 0,
OUTPUT = 1, OUTPUT = 1,
GAIN = 2 GAIN = 2
Amp = object Amp = object
input: ptr CSamples input: ptr CSamples
output: ptr CSamples output: ptr CSamples
gain: ptr cfloat gain: ptr cfloat
template db2coeff(db: cfloat): cfloat = template db2coeff(db: cfloat): cfloat =
pow(10.0, db / 20.0) pow(10.0, db / 20.0)
proc instantiate(descriptor: ptr Lv2Descriptor; sampleRate: cdouble; proc instantiate(descriptor: ptr Lv2Descriptor; sampleRate: cdouble;
bundlePath: cstring; features: ptr ptr Lv2Feature): bundlePath: cstring; features: ptr ptr Lv2Feature):
Lv2Handle {.cdecl.} = Lv2Handle {.cdecl.} =
return createShared(Amp) return createShared(Amp)
proc connectPort(instance: Lv2Handle; port: cuint; proc connectPort(instance: Lv2Handle; port: cuint;
dataLocation: pointer) {.cdecl.} = dataLocation: pointer) {.cdecl.} =
let amp = cast[ptr Amp](instance) let amp = cast[ptr Amp](instance)
case cast[PortIndex](port) case cast[PortIndex](port)
of INPUT: of INPUT:
amp.input = cast[ptr CSamples](dataLocation) amp.input = cast[ptr CSamples](dataLocation)
of OUTPUT: of OUTPUT:
amp.output = cast[ptr CSamples](dataLocation) amp.output = cast[ptr CSamples](dataLocation)
of GAIN: of GAIN:
amp.gain = cast[ptr cfloat](dataLocation) amp.gain = cast[ptr cfloat](dataLocation)
proc activate(instance: Lv2Handle) {.cdecl.} = proc activate(instance: Lv2Handle) {.cdecl.} =
discard discard
proc run(instance: Lv2Handle; nSamples: cuint) {.cdecl.} = proc run(instance: Lv2Handle; nSamples: cuint) {.cdecl.} =
let amp = cast[ptr Amp](instance) let gain = cast[ptr Amp](instance)
for pos in 0 ..< nSamples: for pos in 0 ..< nSamples:
amp.output[pos] = amp.input[pos] * db2coeff(amp.gain[]) gain.output[pos] = gain.input[pos] * db2coeff(gain.gain[])
proc deactivate(instance: Lv2Handle) {.cdecl.} = proc deactivate(instance: Lv2Handle) {.cdecl.} =
discard discard
proc cleanup(instance: Lv2Handle) {.cdecl.} = proc cleanup(instance: Lv2Handle) {.cdecl.} =
freeShared(cast[ptr Amp](instance)) freeShared(cast[ptr Amp](instance))
proc extensionData(uri: cstring): pointer {.cdecl.} = proc extensionData(uri: cstring): pointer {.cdecl.} =
return nil return nil
proc NimMain() {.cdecl, importc.} proc NimMain() {.cdecl, importc.}
@ -67,16 +67,16 @@ proc NimMain() {.cdecl, importc.}
proc lv2Descriptor(index: cuint): ptr Lv2Descriptor {. proc lv2Descriptor(index: cuint): ptr Lv2Descriptor {.
cdecl, exportc, dynlib, extern: "lv2_descriptor".} = cdecl, exportc, dynlib, extern: "lv2_descriptor".} =
NimMain() NimMain()
if index == 0: if index == 0:
result = createShared(Lv2Descriptor) result = createShared(Lv2Descriptor)
result.uri = cstring(PluginUri) result.uri = cstring(PluginUri)
result.instantiate = instantiate result.instantiate = instantiate
result.connectPort = connectPort result.connectPort = connectPort
result.activate = activate result.activate = activate
result.run = run result.run = run
result.deactivate = deactivate result.deactivate = deactivate
result.cleanup = cleanup result.cleanup = cleanup
result.extensionData = extensionData result.extensionData = extensionData