git.sesse.net Git - nageru/blob - nageru/input_mapping.h

   1 #ifndef _INPUT_MAPPING_H
   2 #define _INPUT_MAPPING_H 1
   3
   4 #include <stdint.h>
   5 #include <map>
   6 #include <string>
   7 #include <vector>
   8
   9 enum class InputSourceType { SILENCE, CAPTURE_CARD, ALSA_INPUT, FFMPEG_VIDEO_INPUT };
  10 struct DeviceSpec {
  11         InputSourceType type;
  12         unsigned index;
  13
  14         bool operator== (const DeviceSpec &other) const {
  15                 return type == other.type && index == other.index;
  16         }
  17
  18         bool operator< (const DeviceSpec &other) const {
  19                 if (type != other.type)
  20                         return type < other.type;
  21                 return index < other.index;
  22         }
  23 };
  24 struct DeviceInfo {
  25         std::string display_name;
  26         unsigned num_channels;
  27         std::string alsa_name, alsa_info, alsa_address;  // ALSA devices only, obviously.
  28 };
  29
  30 static inline uint64_t DeviceSpec_to_key(const DeviceSpec &device_spec)
  31 {
  32         return (uint64_t(device_spec.type) << 32) | device_spec.index;
  33 }
  34
  35 static inline DeviceSpec key_to_DeviceSpec(uint64_t key)
  36 {
  37         return DeviceSpec{ InputSourceType(key >> 32), unsigned(key & 0xffffffff) };
  38 }
  39
  40 struct InputMapping {
  41         struct Bus {
  42                 std::string name;
  43                 DeviceSpec device;
  44                 int source_channel[2] { -1, -1 };  // Left and right. -1 = none.
  45         };
  46
  47         std::vector<Bus> buses;
  48 };
  49
  50 // This is perhaps not the most user-friendly output, but it's at least better
  51 // than the raw index.
  52 std::string spec_to_string(DeviceSpec device_spec);
  53
  54 bool save_input_mapping_to_file(const std::map<DeviceSpec, DeviceInfo> &devices,
  55                                 const InputMapping &mapping,
  56                                 const std::string &filename);
  57 bool load_input_mapping_from_file(const std::map<DeviceSpec, DeviceInfo> &devices,
  58                                   const std::string &filename,
  59                                   InputMapping *mapping);
  60
  61 #endif  // !defined(_INPUT_MAPPING_H)