80 lines
1.7 KiB
Go
80 lines
1.7 KiB
Go
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package main
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/*
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#include "projectM-4/projectM.h"
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#include <stdlib.h>
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*/
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import "C"
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import (
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"encoding/binary"
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"errors"
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"io"
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"os"
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"unsafe"
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"github.com/veandco/go-sdl2/sdl"
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)
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const bufSize uint = 2048
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type milkDropWindow struct {
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window *sdl.Window
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context sdl.GLContext
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handle C.projectm_handle
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}
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func newMilkDropWindow(width, height int32) (*milkDropWindow, error) {
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var m milkDropWindow
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var err error
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m.window, err = sdl.CreateWindow("milkbucket", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, width, height, sdl.WINDOW_OPENGL|sdl.WINDOW_RESIZABLE)
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if err != nil {
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return &m, err
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}
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m.context, err = m.window.GLCreateContext()
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if err != nil {
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return &m, err
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}
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m.handle = C.projectm_create()
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if m.handle == nil {
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return &m, errors.New("error creating projectM instance")
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}
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C.projectm_set_window_size(m.handle, C.ulong(width), C.ulong(height))
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return &m, nil
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}
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func (m *milkDropWindow) destroy() {
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C.projectm_destroy(m.handle)
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sdl.GLDeleteContext(m.context)
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m.window.Destroy()
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}
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func (m *milkDropWindow) loadPreset(preset string) {
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cPreset := C.CString("/usr/share/projectM/presets/presets_stock/Zylot - Wisps.milk")
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defer C.free(unsafe.Pointer(cPreset))
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C.projectm_load_preset_file(m.handle, cPreset, false)
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}
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func (m *milkDropWindow) render() (bool, error) {
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var audioData [bufSize]int16
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err := binary.Read(os.Stdin, binary.LittleEndian, &audioData)
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if err == io.ErrUnexpectedEOF {
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return false, nil
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} else if err != nil {
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return true, err
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}
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C.projectm_pcm_add_int16(m.handle, (*C.int16_t)(&audioData[0]), C.uint(bufSize), C.PROJECTM_STEREO)
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C.projectm_opengl_render_frame(m.handle)
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m.window.GLSwap()
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return true, nil
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}
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