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// Steering Wheel Remote |
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// |
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// Douglas Thrift |
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// |
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// $Id$ |
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|
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#include <cassert> |
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#include <iostream> |
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|
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#include <fcntl.h> |
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|
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#include <posix.hpp> |
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#include <regex.hpp> |
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#include <truck.hpp> |
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#include <vector.hpp> |
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|
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#include <Audacious.hpp> |
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|
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bool debug(false); |
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|
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enum Button |
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{ |
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None = 000, |
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PlayPause = 001, |
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VolumeUp = 002, |
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VolumeDown = 004, |
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Next = 010, |
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Previous = 020 |
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}; |
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|
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const _V<Button> buttons(PlayPause, VolumeUp, VolumeDown, Next, Previous); |
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|
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inline std::ostream &operator<<(std::ostream &output, Button button) |
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{ |
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switch (button) |
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{ |
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case None: |
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return output << _B("None"); |
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case PlayPause: |
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return output << _B("PlayPause"); |
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case Previous: |
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return output << _B("Previous"); |
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case Next: |
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return output << _B("Next"); |
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case VolumeDown: |
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return output << _B("VolumeDown"); |
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case VolumeUp: |
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return output << _B("VolumeUp"); |
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default: |
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return output << _B("Unknown"); |
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} |
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} |
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|
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class Buttons |
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{ |
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uint8_t current, previous; |
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_L<Button> events; |
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|
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inline bool Pressed(Button button, bool current_ = true) const |
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{ |
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return ((current_ ? current : previous) & button) == button; |
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} |
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|
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public: |
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Buttons() : current(0) {} |
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|
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inline const _L<Button> &Events() const |
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{ |
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return events; |
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} |
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|
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inline const _L<Button> &Events(uint8_t bytes[8]) |
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{ |
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if (debug) |
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{ |
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assert (bytes[0] == 3); |
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assert (bytes[1] == 2); |
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assert (bytes[2] == 0); |
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assert (bytes[3] == -(bytes[4] - 0373)); |
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assert (bytes[5] == 0); |
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assert (bytes[6] == 0); |
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assert (bytes[7] == 0); |
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} |
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|
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previous = current; |
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current = bytes[3]; |
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|
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events.clear(); |
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|
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_foreach (const _V<Button>, button, buttons) |
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if (Pressed(*button, false) && !Pressed(*button)) |
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events.push_back(*button); |
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|
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return events; |
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} |
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|
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template <Button button> |
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inline bool Pressed() |
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{ |
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return Pressed(button); |
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} |
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}; |
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|
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int main(int argc, char *argv[]) |
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{ |
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std::string device; |
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|
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{ |
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Pcre::RegEx devicePath(_B("^-device=(/.+)$")); |
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Pcre::RegEx deviceNumber(_B("^-device=([0-9]+)$")); |
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Pcre::RegEx deviceName(_B("^-device=(.+)$")); |
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|
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for (char **arg = argv + 1; *arg; ++arg) |
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{ |
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Pcre::RegEx::Match match; |
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|
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if (*arg == _B("-debug")) |
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debug = true; |
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else if (match = devicePath(*arg)) |
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device = match[1]; |
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else if (match = deviceNumber(*arg)) |
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device = _B("/dev/uhid") + match[1]; |
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else if (match = deviceName(*arg)) |
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device = _B("/dev/") + match[1]; |
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else |
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goto usage; |
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} |
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} |
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|
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if (device.empty()) |
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{ |
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usage: std::cout << _B("Usage: ") << argv[0] << _B(" [-debug] [-device=device]") << std::endl; |
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|
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return 2; |
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} |
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|
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try |
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{ |
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int uhid(Posix::Open(device, O_RDONLY)); |
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uint8_t bytes[8]; |
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Buttons buttons; |
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Audacious::Audacious audacious; |
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|
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_forever |
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{ |
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Posix::ReadMost(uhid, bytes, sizeof (bytes)); |
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|
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_foreach (const _L<Button>, button, buttons.Events(bytes)) |
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{ |
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if (debug) |
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std::cerr << _B("button=") << *button << std::endl; |
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|
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if (audacious.IsRunning()) |
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switch (*button) |
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{ |
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default: |
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break; |
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|
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case PlayPause: |
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audacious.PlayPause(); |
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|
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break; |
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|
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case Previous: |
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audacious.PlaylistPrevious(); |
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|
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break; |
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|
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case Next: |
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audacious.PlaylistNext(); |
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|
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break; |
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|
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case VolumeDown: |
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case VolumeUp: |
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int volume(audacious.GetMainVolume() + (*button == VolumeUp ? 1 : -1)); |
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|
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audacious.SetMainVolume(volume); |
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} |
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} |
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} |
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} |
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catch (const std::exception &exception) |
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{ |
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std::cerr << argv[0] << _B(": ") << exception.what() << std::endl; |
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|
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return 1; |
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} |
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|
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return 0; |
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} |
