badhouseplants/daw-project
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Signed-off-by: Nikolai Rodionov <allanger@badhouseplants.net>
This commit is contained in:
Nikolai Rodionov
2026-01-03 14:11:44 +01:00
parent 796fed5070
commit a0fcab8310
4 changed files with 135 additions and 104 deletions
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1
conanfile.py
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@@ -20,6 +20,7 @@ class daw_projectConan(ConanFile):
self.requires("conan-test-lib/0.0.2") self.requires("conan-test-lib/0.0.2")
self.requires("qt/6.10.1") self.requires("qt/6.10.1")
self.requires("libsndfile/1.2.2") self.requires("libsndfile/1.2.2")
self.requires("gtest/1.17.0")
def layout(self): def layout(self):
self.folders.build = "build" self.folders.build = "build"

113
coreaudio.cpp Normal file
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@@ -0,0 +1,113 @@
#include <AudioUnit/AudioUnit.h>
#include <AudioToolbox/AudioToolbox.h>
#include <cmath>
#include <iostream>
#include <unistd.h>
constexpr double SAMPLE_RATE = 44100.0;
constexpr double FREQUENCY = 440.0; // A4
constexpr double AMPLITUDE = 0.25;
struct SineState {
double phase = 0.0;
};
OSStatus renderCallback(
void* inRefCon,
AudioUnitRenderActionFlags* ioActionFlags,
const AudioTimeStamp* inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList* ioData)
{
auto* state = static_cast<SineState*>(inRefCon);
double phase = state->phase;
double phaseIncrement = 2.0 * M_PI * FREQUENCY / SAMPLE_RATE;
for (UInt32 frame = 0; frame < inNumberFrames; ++frame) {
float sample = static_cast<float>(std::sin(phase) * AMPLITUDE);
phase += phaseIncrement;
if (phase >= 2.0 * M_PI)
phase -= 2.0 * M_PI;
// Write same sample to all channels
for (UInt32 buffer = 0; buffer < ioData->mNumberBuffers; ++buffer) {
float* data = static_cast<float*>(ioData->mBuffers[buffer].mData);
data[frame] = sample;
}
}
state->phase = phase;
return noErr;
}
int main() {
AudioUnit audioUnit;
SineState state;
// Describe output unit
AudioComponentDescription desc{};
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_DefaultOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
AudioComponent comp = AudioComponentFindNext(nullptr, &desc);
if (!comp) {
std::cerr << "Failed to find audio component\n";
return 1;
}
AudioComponentInstanceNew(comp, &audioUnit);
// Set stream format
AudioStreamBasicDescription format{};
format.mSampleRate = SAMPLE_RATE;
format.mFormatID = kAudioFormatLinearPCM;
format.mFormatFlags = kAudioFormatFlagIsFloat | kAudioFormatFlagIsPacked;
format.mBitsPerChannel = 32;
format.mChannelsPerFrame = 2;
format.mBytesPerFrame = sizeof(float) * format.mChannelsPerFrame;
format.mFramesPerPacket = 1;
format.mBytesPerPacket = format.mBytesPerFrame;
AudioUnitSetProperty(
audioUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input,
0,
&format,
sizeof(format)
);
// Set render callback
AURenderCallbackStruct callback{};
callback.inputProc = renderCallback;
callback.inputProcRefCon = &state;
AudioUnitSetProperty(
audioUnit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input,
0,
&callback,
sizeof(callback)
);
AudioUnitInitialize(audioUnit);
AudioOutputUnitStart(audioUnit);
std::cout << "Playing sine wave (Ctrl+C to quit)...\n";
while (true) {
sleep(1);
}
AudioOutputUnitStop(audioUnit);
AudioUnitUninitialize(audioUnit);
AudioComponentInstanceDispose(audioUnit);
return 0;
}

7
src/gui/editor.cpp Normal file
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@@ -0,0 +1,7 @@
#include <QPushButton>
QPushButton renderButton()
{
QPushButton button ("Hello world !");
return button;
}

118
src/main.cpp
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@@ -1,110 +1,20 @@
#include <AudioUnit/AudioUnit.h> #include <QApplication>
#include <AudioToolbox/AudioToolbox.h> #include <QPushButton>
#include <cmath> #include <QWidget>
#include <iostream>
#include <unistd.h>
constexpr double SAMPLE_RATE = 44100.0; void renderButton(QWidget *parent) {
constexpr double FREQUENCY = 440.0; // A4 QPushButton *button = new QPushButton("Hello world!", parent);
constexpr double AMPLITUDE = 0.25; button->show();
struct SineState {
double phase = 0.0;
};
OSStatus renderCallback(
void* inRefCon,
AudioUnitRenderActionFlags* ioActionFlags,
const AudioTimeStamp* inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList* ioData)
{
auto* state = static_cast<SineState*>(inRefCon);
double phase = state->phase;
double phaseIncrement = 2.0 * M_PI * FREQUENCY / SAMPLE_RATE;
for (UInt32 frame = 0; frame < inNumberFrames; ++frame) {
float sample = static_cast<float>(std::sin(phase) * AMPLITUDE);
phase += phaseIncrement;
if (phase >= 2.0 * M_PI)
phase -= 2.0 * M_PI;
// Write same sample to all channels
for (UInt32 buffer = 0; buffer < ioData->mNumberBuffers; ++buffer) {
float* data = static_cast<float*>(ioData->mBuffers[buffer].mData);
data[frame] = sample;
}
}
state->phase = phase;
return noErr;
} }
int main() { int main(int argc, char **argv) {
AudioUnit audioUnit; QApplication app (argc, argv);
SineState state;
QWidget window;
window.resize(300, 200);
window.show();
// Describe output unit renderButton(&window);
AudioComponentDescription desc{}; return app.exec();
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_DefaultOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
AudioComponent comp = AudioComponentFindNext(nullptr, &desc);
if (!comp) {
std::cerr << "Failed to find audio component\n";
return 1;
}
AudioComponentInstanceNew(comp, &audioUnit);
// Set stream format
AudioStreamBasicDescription format{};
format.mSampleRate = SAMPLE_RATE;
format.mFormatID = kAudioFormatLinearPCM;
format.mFormatFlags = kAudioFormatFlagIsFloat | kAudioFormatFlagIsPacked;
format.mBitsPerChannel = 32;
format.mChannelsPerFrame = 2;
format.mBytesPerFrame = sizeof(float) * format.mChannelsPerFrame;
format.mFramesPerPacket = 1;
format.mBytesPerPacket = format.mBytesPerFrame;
AudioUnitSetProperty(
audioUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input,
0,
&format,
sizeof(format)
);
// Set render callback
AURenderCallbackStruct callback{};
callback.inputProc = renderCallback;
callback.inputProcRefCon = &state;
AudioUnitSetProperty(
audioUnit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input,
0,
&callback,
sizeof(callback)
);
AudioUnitInitialize(audioUnit);
AudioOutputUnitStart(audioUnit);
std::cout << "Playing sine wave (Ctrl+C to quit)...\n";
while (true) {
sleep(1);
}
AudioOutputUnitStop(audioUnit);
AudioUnitUninitialize(audioUnit);
AudioComponentInstanceDispose(audioUnit);
return 0;
} }