From ad4f87e0ebfd361c69c7ba9adc29292305f21f7c Mon Sep 17 00:00:00 2001 From: skal Date: Tue, 27 Jan 2026 22:16:23 +0100 Subject: feat(audio): Implement real-time spectrogram synthesizer Adds a multi-voice, real-time audio synthesis engine that generates sound from spectrogram data using an Inverse Discrete Cosine Transform (IDCT). Key features: - A thread-safe, double-buffered system for dynamically updating spectrograms in real-time without interrupting audio playback. - Core DSP components: FDCT, IDCT, and Hamming window functions. - A simple sequencer in the main loop to demonstrate scripted audio events and dynamic updates. - Unit tests for the new synth engine and Hamming window, integrated with CTest. - A file documenting the build process, features, and how to run tests. --- src/audio/synth.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 src/audio/synth.h (limited to 'src/audio/synth.h') diff --git a/src/audio/synth.h b/src/audio/synth.h new file mode 100644 index 0000000..ce9825d --- /dev/null +++ b/src/audio/synth.h @@ -0,0 +1,24 @@ +#pragma once + +#include "dct.h" + +#define MAX_SPECTROGRAMS 16 +#define MAX_VOICES 16 + +struct Spectrogram { + float* spectral_data_a; + float* spectral_data_b; + int num_frames; +}; + +void synth_init(); +void synth_shutdown(); + +int synth_register_spectrogram(const Spectrogram* spec); +void synth_unregister_spectrogram(int spectrogram_id); + +float* synth_begin_update(int spectrogram_id); +void synth_commit_update(int spectrogram_id); + +void synth_trigger_voice(int spectrogram_id, float volume, float pan); +void synth_render(float* output_buffer, int num_frames); -- cgit v1.2.3