1 files changed, 55 insertions, 0 deletions
diff --git a/src/pke-at-common.cpp b/src/pke-at-common.cpp
new file mode 100644
index 0000000..a2a290f
--- /dev/null
+++ b/src/pke-at-common.cpp
@@ -0,0 +1,55 @@
+
+#include "pke-at-common.hpp"
+
+#include "pke-at-settings.hpp"
+
+#include "pke/audio-types.hpp"
+
+void pke_at_bpm_reset(uint8_t bpm) {
+	g_at.bpm.last = bpm;
+	g_at.bpm.target = bpm;
+	g_at.bpm.current = bpm;
+	g_at.bpm.lerp_delta = 0.f;
+	g_at.bpm.lerp_delta_duration = 0.f;
+	g_at.bpm.delta_per_beat = 60.f / (double)bpm;
+	g_at.bpm.delta_since_last_beat = 0.f;
+	g_at.mtrnm.beat = 0;
+	g_at.mtrnm.beats_per_bar = 4;
+}
+
+AssetHandle pke_at_audio_get_or_generate_sawtooth(double pitch_freq, double duration) {
+	uint32_t u;
+	uint32_t len;
+	float *bytes;
+	float phase;
+	float phase_increment;
+	pke_asset_details details{};
+	AssetHandle handle;
+	AssetKey key;
+
+	snprintf(key, AssetKeyLength, "saw%.5u;%.2f", (uint32_t)pitch_freq, duration);
+	fprintf(stdout, "sawtooth: %s%c\n", key, '\0');
+
+	handle = AM_GetHandle(key);
+	if (handle != AssetHandle_MAX) {
+		return handle;
+	}
+
+	len = std::ceil(PKE_AUDIO_BITRATE * duration);
+	bytes = pk_new_arr<float>(len, g_at.mem.bkt_transient);
+	if (bytes == nullptr) {
+		throw "[pke_at_audio_get_or_generate_sawtooth] failed to alloc";
+	}
+	phase = 0.0f;
+	phase_increment = pitch_freq / float(PKE_AUDIO_BITRATE);
+	for (u = 0; u < len; ++u) {
+		bytes[u] = 2.f * (phase - floor(phase + 0.5f));
+		phase += phase_increment;
+		if (phase >= 1.f) phase -= 1.f;
+	}
+
+	// TODO
+	// details.audio.
+	handle = AM_Register(key, PKE_ASSET_TYPE_AUDIO, bytes, len, 64, &details);
+	return handle;
+}