Rewrite main.cpp in C as a thin CLI on top of a new gsr_recorder library API

The recording setup, record loop and teardown moved into a gsr_recorder
pseudo class that reports saved recordings through callbacks, so the CLI
only parses arguments, handles signals and prints results.
The project is now built as pure C.

1 files changed, 54 insertions, 0 deletions

diff --git a/include/recorder/recorder.h b/include/recorder/recorder.h
new file mode 100644
index 0000000..bbd37e1
--- /dev/null
+++ b/include/recorder/recorder.h
@@ -0,0 +1,54 @@
+#ifndef GSR_RECORDER_RECORDER_H
+#define GSR_RECORDER_RECORDER_H
+
+#include <stdbool.h>
+#include "settings.h"
+#include "capture_source.h"
+#include "capture_setup.h"
+#include "audio_input.h"
+#include "windowing.h"
+#ifdef GSR_APP_AUDIO
+#include "../pipewire_audio.h"
+#endif
+
+/* Records video and audio to a file, or to a replay buffer that can be saved to a file at any time */
+typedef struct gsr_recorder gsr_recorder;
+
+typedef struct {
+    /* |filepath| is NULL when the recording failed to save */
+    void (*replay_saved)(const char *filepath, void *userdata);
+    void (*recording_started)(const char *filepath, void *userdata);
+    /* |filepath| is NULL when the recording failed to save */
+    void (*recording_stopped)(const char *filepath, void *userdata);
+    void (*paused_changed)(bool paused, void *userdata);
+    void *userdata;
+} gsr_recorder_callbacks;
+
+typedef struct {
+    const gsr_recorder_settings *settings;
+    gsr_windowing *windowing;
+    gsr_capture_deps *capture_deps;
+    gsr_capture_sources *capture_sources;
+    gsr_audio_input_tracks *audio_input_tracks;
+    const char **plugin_filepaths;
+    int num_plugin_filepaths;
+#ifdef GSR_APP_AUDIO
+    gsr_pipewire_audio *pipewire_audio;
+#endif
+} gsr_recorder_params;
+
+/* Returns NULL on failure and sets |error| to a |gsr_error| value */
+gsr_recorder* gsr_recorder_create(const gsr_recorder_params *params, const gsr_recorder_callbacks *callbacks, int *error);
+void gsr_recorder_destroy(gsr_recorder *self);
+
+/* Returns a |gsr_error| value. Records until gsr_recorder_stop is called or until the capture target is gone */
+int gsr_recorder_run(gsr_recorder *self);
+
+/* These are safe to call from a signal handler or from another thread */
+void gsr_recorder_stop(gsr_recorder *self);
+void gsr_recorder_toggle_pause(gsr_recorder *self);
+void gsr_recorder_toggle_replay_recording(gsr_recorder *self);
+/* |seconds| can be GSR_SAVE_REPLAY_SECONDS_FULL to save the whole replay buffer */
+void gsr_recorder_save_replay(gsr_recorder *self, int seconds);
+
+#endif /* GSR_RECORDER_RECORDER_H */