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36 lines
881 B
V
36 lines
881 B
V
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import os
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import sokol.audio
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struct AContext {
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mut:
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frame_0 int
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}
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fn my_audio_stream_callback(buffer &f32, num_frames, num_channels int, mut acontext AContext) {
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mut soundbuffer := buffer
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for frame := 0; frame < num_frames; frame++ {
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t := int(f32(acontext.frame_0 + frame) * 0.245)
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// Credits for the formula below: https://www.youtube.com/watch?v=V4GfkFbDojc
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// "Techno" by Gabriel Miceli
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y := (t * (((t / 10 | 0) ^ ((t / 10 | 0) -
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1280)) % 11) / 2 & 127) +
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(t * (((t / 640 | 0) ^ ((t / 640 | 0) - 2)) % 13) / 2 & 127)
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for ch := 0; ch < num_channels; ch++ {
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idx := frame * num_channels + ch
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unsafe {
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soundbuffer[idx] = f32(byte(y) - 127) / 255.0
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}
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}
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}
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acontext.frame_0 += num_frames
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}
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fn main() {
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audio.setup({
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stream_userdata_cb: my_audio_stream_callback
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user_data: &AContext{}
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})
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os.input('Press Enter to exit')
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audio.shutdown()
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}
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