Move everything into a separate futatabi/ subdir, for the upcoming merge with Futatabi.

[nageru] / nageru / input_mapping.h

diff --git a/nageru/input_mapping.h b/nageru/input_mapping.h
new file mode 100644 (file)
index 0000000..67af0f4
--- /dev/null
+++ b/nageru/input_mapping.h
@@ -0,0 +1,61 @@
+#ifndef _INPUT_MAPPING_H
+#define _INPUT_MAPPING_H 1
+
+#include <stdint.h>
+#include <map>
+#include <string>
+#include <vector>
+
+enum class InputSourceType { SILENCE, CAPTURE_CARD, ALSA_INPUT, FFMPEG_VIDEO_INPUT };
+struct DeviceSpec {
+       InputSourceType type;
+       unsigned index;
+
+       bool operator== (const DeviceSpec &other) const {
+               return type == other.type && index == other.index;
+       }
+
+       bool operator< (const DeviceSpec &other) const {
+               if (type != other.type)
+                       return type < other.type;
+               return index < other.index;
+       }
+};
+struct DeviceInfo {
+       std::string display_name;
+       unsigned num_channels;
+       std::string alsa_name, alsa_info, alsa_address;  // ALSA devices only, obviously.
+};
+
+static inline uint64_t DeviceSpec_to_key(const DeviceSpec &device_spec)
+{
+       return (uint64_t(device_spec.type) << 32) | device_spec.index;
+}
+
+static inline DeviceSpec key_to_DeviceSpec(uint64_t key)
+{
+       return DeviceSpec{ InputSourceType(key >> 32), unsigned(key & 0xffffffff) };
+}
+
+struct InputMapping {
+       struct Bus {
+               std::string name;
+               DeviceSpec device;
+               int source_channel[2] { -1, -1 };  // Left and right. -1 = none.
+       };
+
+       std::vector<Bus> buses;
+};
+
+// This is perhaps not the most user-friendly output, but it's at least better
+// than the raw index.
+std::string spec_to_string(DeviceSpec device_spec);
+
+bool save_input_mapping_to_file(const std::map<DeviceSpec, DeviceInfo> &devices,
+                                const InputMapping &mapping,
+                                const std::string &filename);
+bool load_input_mapping_from_file(const std::map<DeviceSpec, DeviceInfo> &devices,
+                                  const std::string &filename,
+                                  InputMapping *mapping);
+
+#endif  // !defined(_INPUT_MAPPING_H)