Make it possible to load/save input mappings.

[nageru] / alsa_input.cpp

diff --git a/alsa_input.cpp b/alsa_input.cpp
index c53b24189da2f43a7335522aecf4aaaf81226a4a..0f8e99c95b9b0d536451f26c85bc1fa3142a9003 100644 (file)
--- a/alsa_input.cpp
+++ b/alsa_input.cpp
@@ -1,9 +1,11 @@
 #include "alsa_input.h"
 #include "audio_mixer.h"
 #include "defs.h"
+#include "state.pb.h"
 
 #include <sys/inotify.h>
 
+#include <algorithm>
 #include <functional>
 #include <unordered_map>
 
@@ -645,6 +647,43 @@ unsigned ALSAPool::find_free_device_index(const string &name, const string &info
        return devices.size() - 1;
 }
 
+unsigned ALSAPool::create_dead_card(const string &name, const string &info, unsigned num_channels)
+{
+       lock_guard<mutex> lock(mu);
+
+       // See if there are any empty slots. If not, insert one at the end.
+       vector<Device>::iterator free_device =
+               find_if(devices.begin(), devices.end(),
+                       [](const Device &device) { return device.state == Device::State::EMPTY; });
+       if (free_device == devices.end()) {
+               devices.push_back(Device());
+               inputs.emplace_back(nullptr);
+               free_device = devices.end() - 1;
+       }
+
+       free_device->state = Device::State::DEAD;
+       free_device->name = name;
+       free_device->info = info;
+       free_device->num_channels = num_channels;
+       free_device->held = true;
+
+       return distance(devices.begin(), free_device);
+}
+
+void ALSAPool::serialize_device(unsigned index, DeviceSpecProto *serialized)
+{
+       lock_guard<mutex> lock(mu);
+       assert(index < devices.size());
+       assert(devices[index].held);
+       serialized->set_type(DeviceSpecProto::ALSA_INPUT);
+       serialized->set_index(index);
+       serialized->set_display_name(devices[index].display_name());
+       serialized->set_alsa_name(devices[index].name);
+       serialized->set_alsa_info(devices[index].info);
+       serialized->set_num_channels(devices[index].num_channels);
+       serialized->set_address(devices[index].address);
+}
+
 void ALSAPool::free_card(unsigned index)
 {
        DeviceSpec spec{InputSourceType::ALSA_INPUT, index};