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-rw-r--r--src/audio/audio.cc30
-rw-r--r--src/audio/audio.cpp28
-rw-r--r--src/audio/fdct.cc17
-rw-r--r--src/audio/fdct.cpp17
-rw-r--r--src/audio/idct.cc17
-rw-r--r--src/audio/idct.cpp17
-rw-r--r--src/audio/synth.cc179
-rw-r--r--src/audio/synth.cpp167
-rw-r--r--src/audio/synth.h12
-rw-r--r--src/audio/window.cc9
-rw-r--r--src/audio/window.cpp9
11 files changed, 258 insertions, 244 deletions
diff --git a/src/audio/audio.cc b/src/audio/audio.cc
new file mode 100644
index 0000000..0eceed5
--- /dev/null
+++ b/src/audio/audio.cc
@@ -0,0 +1,30 @@
+#define MINIAUDIO_IMPLEMENTATION
+#include "miniaudio.h"
+#include "synth.h"
+#include <math.h>
+
+static ma_device device;
+
+static void audio_callback(ma_device *, void *output, const void *,
+ ma_uint32 frames) {
+ synth_render((float *)output, frames);
+}
+
+void audio_init() {
+ synth_init();
+ ma_device_config cfg = ma_device_config_init(ma_device_type_playback);
+ cfg.playback.format = ma_format_f32;
+ cfg.playback.channels = 2;
+ cfg.sampleRate = 32000;
+ cfg.dataCallback = audio_callback;
+
+ ma_device_init(nullptr, &cfg, &device);
+ ma_device_start(&device);
+}
+
+void audio_update() {
+}
+void audio_shutdown() {
+ synth_shutdown();
+ ma_device_uninit(&device);
+}
diff --git a/src/audio/audio.cpp b/src/audio/audio.cpp
deleted file mode 100644
index 318ccb8..0000000
--- a/src/audio/audio.cpp
+++ /dev/null
@@ -1,28 +0,0 @@
-#define MINIAUDIO_IMPLEMENTATION
-#include "miniaudio.h"
-#include "synth.h"
-#include <math.h>
-
-static ma_device device;
-
-static void audio_callback(ma_device*, void* output, const void*, ma_uint32 frames) {
- synth_render((float*)output, frames);
-}
-
-void audio_init() {
- synth_init();
- ma_device_config cfg = ma_device_config_init(ma_device_type_playback);
- cfg.playback.format = ma_format_f32;
- cfg.playback.channels = 2;
- cfg.sampleRate = 32000;
- cfg.dataCallback = audio_callback;
-
- ma_device_init(nullptr, &cfg, &device);
- ma_device_start(&device);
-}
-
-void audio_update() {}
-void audio_shutdown() {
- synth_shutdown();
- ma_device_uninit(&device);
-}
diff --git a/src/audio/fdct.cc b/src/audio/fdct.cc
new file mode 100644
index 0000000..5cf0211
--- /dev/null
+++ b/src/audio/fdct.cc
@@ -0,0 +1,17 @@
+#include "dct.h"
+#include "util/math.h"
+#include <math.h>
+
+void fdct_512(const float input[DCT_SIZE], float output[DCT_SIZE]) {
+ float scale_k0 = sqrtf(1.0f / DCT_SIZE);
+ float scale_kn = sqrtf(2.0f / DCT_SIZE);
+
+ for (int k = 0; k < DCT_SIZE; ++k) {
+ float sum = 0.0f;
+ for (int n = 0; n < DCT_SIZE; ++n) {
+ sum += input[n] * cosf((PI / DCT_SIZE) * (n + 0.5f) * k);
+ }
+ float scale = (k == 0) ? scale_k0 : scale_kn;
+ output[k] = sum * scale;
+ }
+}
diff --git a/src/audio/fdct.cpp b/src/audio/fdct.cpp
deleted file mode 100644
index 50ab458..0000000
--- a/src/audio/fdct.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#include "dct.h"
-#include "util/math.h"
-#include <math.h>
-
-void fdct_512(const float input[DCT_SIZE], float output[DCT_SIZE]) {
- float scale_k0 = sqrtf(1.0f / DCT_SIZE);
- float scale_kn = sqrtf(2.0f / DCT_SIZE);
-
- for (int k = 0; k < DCT_SIZE; ++k) {
- float sum = 0.0f;
- for (int n = 0; n < DCT_SIZE; ++n) {
- sum += input[n] * cosf((PI / DCT_SIZE) * (n + 0.5f) * k);
- }
- float scale = (k == 0) ? scale_k0 : scale_kn;
- output[k] = sum * scale;
- }
-}
diff --git a/src/audio/idct.cc b/src/audio/idct.cc
new file mode 100644
index 0000000..5d6bde0
--- /dev/null
+++ b/src/audio/idct.cc
@@ -0,0 +1,17 @@
+#include "dct.h"
+#include "util/math.h"
+#include <math.h>
+
+void idct_512(const float input[DCT_SIZE], float output[DCT_SIZE]) {
+ float scale_k0 = sqrtf(1.0f / DCT_SIZE);
+ float scale_kn = sqrtf(2.0f / DCT_SIZE);
+
+ for (int n = 0; n < DCT_SIZE; ++n) {
+ float sum = 0.0f;
+ for (int k = 0; k < DCT_SIZE; ++k) {
+ float scale = (k == 0) ? scale_k0 : scale_kn;
+ sum += scale * input[k] * cosf((PI / DCT_SIZE) * (n + 0.5f) * k);
+ }
+ output[n] = sum;
+ }
+}
diff --git a/src/audio/idct.cpp b/src/audio/idct.cpp
deleted file mode 100644
index a32f92e..0000000
--- a/src/audio/idct.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#include "dct.h"
-#include "util/math.h"
-#include <math.h>
-
-void idct_512(const float input[DCT_SIZE], float output[DCT_SIZE]) {
- float scale_k0 = sqrtf(1.0f / DCT_SIZE);
- float scale_kn = sqrtf(2.0f / DCT_SIZE);
-
- for (int n = 0; n < DCT_SIZE; ++n) {
- float sum = 0.0f;
- for (int k = 0; k < DCT_SIZE; ++k) {
- float scale = (k == 0) ? scale_k0 : scale_kn;
- sum += scale * input[k] * cosf((PI / DCT_SIZE) * (n + 0.5f) * k);
- }
- output[n] = sum;
- }
-}
diff --git a/src/audio/synth.cc b/src/audio/synth.cc
new file mode 100644
index 0000000..451fcdb
--- /dev/null
+++ b/src/audio/synth.cc
@@ -0,0 +1,179 @@
+#include "synth.h"
+#include "audio/window.h"
+#include <atomic>
+#include <string.h> // For memset
+
+struct Voice {
+ bool active;
+ int spectrogram_id;
+ float volume;
+ float pan_left;
+ float pan_right;
+
+ int current_spectral_frame;
+ int total_spectral_frames;
+
+ float time_domain_buffer[DCT_SIZE];
+ int buffer_pos;
+
+ const volatile float *active_spectral_data;
+};
+
+static struct {
+ Spectrogram spectrograms[MAX_SPECTROGRAMS];
+ const volatile float *active_spectrogram_data[MAX_SPECTROGRAMS];
+ bool spectrogram_registered[MAX_SPECTROGRAMS];
+} g_synth_data;
+
+static Voice g_voices[MAX_VOICES];
+
+void synth_init() {
+ memset(&g_synth_data, 0, sizeof(g_synth_data));
+ memset(g_voices, 0, sizeof(g_voices));
+}
+
+void synth_shutdown() {
+ // Nothing to do here since we are not allocating memory
+}
+
+int synth_register_spectrogram(const Spectrogram *spec) {
+ for (int i = 0; i < MAX_SPECTROGRAMS; ++i) {
+ if (!g_synth_data.spectrogram_registered[i]) {
+ g_synth_data.spectrograms[i] = *spec;
+ g_synth_data.active_spectrogram_data[i] = spec->spectral_data_a;
+ g_synth_data.spectrogram_registered[i] = true;
+ return i;
+ }
+ }
+ return -1; // No free slots
+}
+
+void synth_unregister_spectrogram(int spectrogram_id) {
+ if (spectrogram_id >= 0 && spectrogram_id < MAX_SPECTROGRAMS) {
+ g_synth_data.spectrogram_registered[spectrogram_id] = false;
+ }
+}
+
+float *synth_begin_update(int spectrogram_id) {
+ if (spectrogram_id < 0 || spectrogram_id >= MAX_SPECTROGRAMS ||
+ !g_synth_data.spectrogram_registered[spectrogram_id]) {
+ return nullptr;
+ }
+
+ const volatile float *active_ptr =
+ g_synth_data.active_spectrogram_data[spectrogram_id];
+
+ if (active_ptr == g_synth_data.spectrograms[spectrogram_id].spectral_data_a) {
+ return g_synth_data.spectrograms[spectrogram_id].spectral_data_b;
+ } else {
+ return g_synth_data.spectrograms[spectrogram_id].spectral_data_a;
+ }
+}
+
+void synth_commit_update(int spectrogram_id) {
+ if (spectrogram_id < 0 || spectrogram_id >= MAX_SPECTROGRAMS ||
+ !g_synth_data.spectrogram_registered[spectrogram_id]) {
+ return;
+ }
+
+ const volatile float *old_active_ptr =
+ g_synth_data.active_spectrogram_data[spectrogram_id];
+ const float *new_active_ptr =
+ (old_active_ptr ==
+ g_synth_data.spectrograms[spectrogram_id].spectral_data_a)
+ ? g_synth_data.spectrograms[spectrogram_id].spectral_data_b
+ : g_synth_data.spectrograms[spectrogram_id].spectral_data_a;
+
+ // Atomic swap using GCC/Clang builtins for thread safety
+ __atomic_store_n(
+ (const float **)&g_synth_data.active_spectrogram_data[spectrogram_id],
+ new_active_ptr, __ATOMIC_RELEASE);
+}
+
+void synth_trigger_voice(int spectrogram_id, float volume, float pan) {
+ if (spectrogram_id < 0 || spectrogram_id >= MAX_SPECTROGRAMS ||
+ !g_synth_data.spectrogram_registered[spectrogram_id]) {
+ return;
+ }
+
+ for (int i = 0; i < MAX_VOICES; ++i) {
+ if (!g_voices[i].active) {
+ Voice &v = g_voices[i];
+ v.active = true;
+ v.spectrogram_id = spectrogram_id;
+ v.volume = volume;
+
+ // Simple linear panning
+ v.pan_left = (pan > 0.0f) ? (1.0f - pan) : 1.0f;
+ v.pan_right = (pan < 0.0f) ? (1.0f + pan) : 1.0f;
+
+ v.current_spectral_frame = 0;
+ v.total_spectral_frames =
+ g_synth_data.spectrograms[spectrogram_id].num_frames;
+ v.buffer_pos = DCT_SIZE; // Force IDCT on first render
+ v.active_spectral_data =
+ g_synth_data.active_spectrogram_data[spectrogram_id];
+
+ return; // Voice triggered
+ }
+ }
+}
+
+void synth_render(float *output_buffer, int num_frames) {
+ float window[WINDOW_SIZE];
+ hamming_window_512(window);
+
+ for (int i = 0; i < num_frames; ++i) {
+ float left_sample = 0.0f;
+ float right_sample = 0.0f;
+
+ for (int v_idx = 0; v_idx < MAX_VOICES; ++v_idx) {
+ Voice &v = g_voices[v_idx];
+ if (!v.active)
+ continue;
+
+ if (v.buffer_pos >= DCT_SIZE) {
+ if (v.current_spectral_frame >= v.total_spectral_frames) {
+ v.active = false;
+ continue;
+ }
+
+ // Fetch the latest active spectrogram pointer for this voice
+ v.active_spectral_data =
+ g_synth_data.active_spectrogram_data[v.spectrogram_id];
+
+ const float *spectral_frame = (const float *)v.active_spectral_data +
+ (v.current_spectral_frame * DCT_SIZE);
+
+ float windowed_frame[DCT_SIZE];
+ for (int j = 0; j < DCT_SIZE; ++j) {
+ windowed_frame[j] = spectral_frame[j] * window[j];
+ }
+
+ idct_512(windowed_frame, v.time_domain_buffer);
+
+ v.buffer_pos = 0;
+ v.current_spectral_frame++;
+ }
+
+ float voice_sample = v.time_domain_buffer[v.buffer_pos] * v.volume;
+ left_sample += voice_sample * v.pan_left;
+ right_sample += voice_sample * v.pan_right;
+
+ v.buffer_pos++;
+ }
+
+ output_buffer[i * 2] = left_sample;
+ output_buffer[i * 2 + 1] = right_sample;
+ }
+}
+
+int synth_get_active_voice_count() {
+ int count = 0;
+ for (int i = 0; i < MAX_VOICES; ++i) {
+ if (g_voices[i].active) {
+ count++;
+ }
+ }
+ return count;
+}
diff --git a/src/audio/synth.cpp b/src/audio/synth.cpp
deleted file mode 100644
index 3c20b0b..0000000
--- a/src/audio/synth.cpp
+++ /dev/null
@@ -1,167 +0,0 @@
-#include "synth.h"
-#include "audio/window.h"
-#include <string.h> // For memset
-#include <atomic>
-
-struct Voice {
- bool active;
- int spectrogram_id;
- float volume;
- float pan_left;
- float pan_right;
-
- int current_spectral_frame;
- int total_spectral_frames;
-
- float time_domain_buffer[DCT_SIZE];
- int buffer_pos;
-
- const volatile float* active_spectral_data;
-};
-
-static struct {
- Spectrogram spectrograms[MAX_SPECTROGRAMS];
- const volatile float* active_spectrogram_data[MAX_SPECTROGRAMS];
- bool spectrogram_registered[MAX_SPECTROGRAMS];
-} g_synth_data;
-
-static Voice g_voices[MAX_VOICES];
-
-void synth_init() {
- memset(&g_synth_data, 0, sizeof(g_synth_data));
- memset(g_voices, 0, sizeof(g_voices));
-}
-
-void synth_shutdown() {
- // Nothing to do here since we are not allocating memory
-}
-
-int synth_register_spectrogram(const Spectrogram* spec) {
- for (int i = 0; i < MAX_SPECTROGRAMS; ++i) {
- if (!g_synth_data.spectrogram_registered[i]) {
- g_synth_data.spectrograms[i] = *spec;
- g_synth_data.active_spectrogram_data[i] = spec->spectral_data_a;
- g_synth_data.spectrogram_registered[i] = true;
- return i;
- }
- }
- return -1; // No free slots
-}
-
-void synth_unregister_spectrogram(int spectrogram_id) {
- if (spectrogram_id >= 0 && spectrogram_id < MAX_SPECTROGRAMS) {
- g_synth_data.spectrogram_registered[spectrogram_id] = false;
- }
-}
-
-float* synth_begin_update(int spectrogram_id) {
- if (spectrogram_id < 0 || spectrogram_id >= MAX_SPECTROGRAMS || !g_synth_data.spectrogram_registered[spectrogram_id]) {
- return nullptr;
- }
-
- const volatile float* active_ptr = g_synth_data.active_spectrogram_data[spectrogram_id];
-
- if (active_ptr == g_synth_data.spectrograms[spectrogram_id].spectral_data_a) {
- return g_synth_data.spectrograms[spectrogram_id].spectral_data_b;
- } else {
- return g_synth_data.spectrograms[spectrogram_id].spectral_data_a;
- }
-}
-
-void synth_commit_update(int spectrogram_id) {
- if (spectrogram_id < 0 || spectrogram_id >= MAX_SPECTROGRAMS || !g_synth_data.spectrogram_registered[spectrogram_id]) {
- return;
- }
-
- const volatile float* old_active_ptr = g_synth_data.active_spectrogram_data[spectrogram_id];
- const float* new_active_ptr = (old_active_ptr == g_synth_data.spectrograms[spectrogram_id].spectral_data_a)
- ? g_synth_data.spectrograms[spectrogram_id].spectral_data_b
- : g_synth_data.spectrograms[spectrogram_id].spectral_data_a;
-
- // Atomic swap using GCC/Clang builtins for thread safety
- __atomic_store_n((const float**)&g_synth_data.active_spectrogram_data[spectrogram_id], new_active_ptr, __ATOMIC_RELEASE);
-}
-
-
-void synth_trigger_voice(int spectrogram_id, float volume, float pan) {
- if (spectrogram_id < 0 || spectrogram_id >= MAX_SPECTROGRAMS || !g_synth_data.spectrogram_registered[spectrogram_id]) {
- return;
- }
-
- for (int i = 0; i < MAX_VOICES; ++i) {
- if (!g_voices[i].active) {
- Voice& v = g_voices[i];
- v.active = true;
- v.spectrogram_id = spectrogram_id;
- v.volume = volume;
-
- // Simple linear panning
- v.pan_left = (pan > 0.0f) ? (1.0f - pan) : 1.0f;
- v.pan_right = (pan < 0.0f) ? (1.0f + pan) : 1.0f;
-
- v.current_spectral_frame = 0;
- v.total_spectral_frames = g_synth_data.spectrograms[spectrogram_id].num_frames;
- v.buffer_pos = DCT_SIZE; // Force IDCT on first render
- v.active_spectral_data = g_synth_data.active_spectrogram_data[spectrogram_id];
-
- return; // Voice triggered
- }
- }
-}
-
-
-void synth_render(float* output_buffer, int num_frames) {
- float window[WINDOW_SIZE];
- hamming_window_512(window);
-
- for (int i = 0; i < num_frames; ++i) {
- float left_sample = 0.0f;
- float right_sample = 0.0f;
-
- for (int v_idx = 0; v_idx < MAX_VOICES; ++v_idx) {
- Voice& v = g_voices[v_idx];
- if (!v.active) continue;
-
- if (v.buffer_pos >= DCT_SIZE) {
- if (v.current_spectral_frame >= v.total_spectral_frames) {
- v.active = false;
- continue;
- }
-
- // Fetch the latest active spectrogram pointer for this voice
- v.active_spectral_data = g_synth_data.active_spectrogram_data[v.spectrogram_id];
-
- const float* spectral_frame = (const float*)v.active_spectral_data + (v.current_spectral_frame * DCT_SIZE);
-
- float windowed_frame[DCT_SIZE];
- for(int j=0; j<DCT_SIZE; ++j) {
- windowed_frame[j] = spectral_frame[j] * window[j];
- }
-
- idct_512(windowed_frame, v.time_domain_buffer);
-
- v.buffer_pos = 0;
- v.current_spectral_frame++;
- }
-
- float voice_sample = v.time_domain_buffer[v.buffer_pos] * v.volume;
- left_sample += voice_sample * v.pan_left;
- right_sample += voice_sample * v.pan_right;
-
- v.buffer_pos++;
- }
-
- output_buffer[i * 2] = left_sample;
- output_buffer[i * 2 + 1] = right_sample;
- }
-}
-
-int synth_get_active_voice_count() {
- int count = 0;
- for (int i = 0; i < MAX_VOICES; ++i) {
- if (g_voices[i].active) {
- count++;
- }
- }
- return count;
-}
diff --git a/src/audio/synth.h b/src/audio/synth.h
index 17770a7..eadde10 100644
--- a/src/audio/synth.h
+++ b/src/audio/synth.h
@@ -6,20 +6,20 @@
#define MAX_VOICES 16
struct Spectrogram {
- float* spectral_data_a;
- float* spectral_data_b;
- int num_frames;
+ float *spectral_data_a;
+ float *spectral_data_b;
+ int num_frames;
};
void synth_init();
void synth_shutdown();
-int synth_register_spectrogram(const Spectrogram* spec);
+int synth_register_spectrogram(const Spectrogram *spec);
void synth_unregister_spectrogram(int spectrogram_id);
-float* synth_begin_update(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);
+void synth_render(float *output_buffer, int num_frames);
int synth_get_active_voice_count();
diff --git a/src/audio/window.cc b/src/audio/window.cc
new file mode 100644
index 0000000..d92f371
--- /dev/null
+++ b/src/audio/window.cc
@@ -0,0 +1,9 @@
+#include "window.h"
+#include "util/math.h"
+#include <math.h>
+
+void hamming_window_512(float window[WINDOW_SIZE]) {
+ for (int i = 0; i < WINDOW_SIZE; ++i) {
+ window[i] = 0.54f - 0.46f * cosf(2.0f * PI * i / (WINDOW_SIZE - 1));
+ }
+}
diff --git a/src/audio/window.cpp b/src/audio/window.cpp
deleted file mode 100644
index 3f36480..0000000
--- a/src/audio/window.cpp
+++ /dev/null
@@ -1,9 +0,0 @@
-#include "window.h"
-#include "util/math.h"
-#include <math.h>
-
-void hamming_window_512(float window[WINDOW_SIZE]) {
- for (int i = 0; i < WINDOW_SIZE; ++i) {
- window[i] = 0.54f - 0.46f * cosf(2.0f * PI * i / (WINDOW_SIZE - 1));
- }
-}
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