prism-tui PoC

native/src/system_audio_capture.h

@@ -0,0 +1,62 @@
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace Prism::Capture {
+
+struct Support {
+    bool available = false;
+    std::string reason;
+};
+
+struct OutputDevice {
+    std::string id;
+    std::string label;
+    double sampleRate = 48000.0;
+    uint32_t channelCount = 2;
+    bool isDefault = false;
+};
+
+struct StartResult {
+    double sampleRate = 48000.0;
+    uint32_t channelCount = 2;
+    std::string deviceId;
+    std::string deviceLabel;
+};
+
+struct AudioChunk {
+    std::vector<float> left;
+    std::vector<float> right;
+    uint32_t channelCount = 2;
+    double capturedAtMilliseconds = 0.0;
+    uint64_t sequence = 0;
+};
+
+struct DrainResult {
+    std::vector<AudioChunk> chunks;
+    uint64_t overwriteCount = 0;
+    size_t queueDepth = 0;
+};
+
+class SystemAudioCapture {
+public:
+    virtual ~SystemAudioCapture() = default;
+
+    virtual Support getSupport() const = 0;
+    virtual std::vector<OutputDevice> listOutputDevices() = 0;
+    virtual bool start(const std::string& requestedDeviceId,
+                       StartResult* result,
+                       std::string* errorMessage) = 0;
+    virtual void stop() = 0;
+    virtual DrainResult drain(size_t maxChunks = 64) = 0;
+    virtual double nowMilliseconds() const = 0;
+    virtual const char* backendName() const = 0;
+};
+
+std::unique_ptr<SystemAudioCapture> createSystemAudioCapture();
+
+}  // namespace Prism::Capture