Move audio/video codec setup from main.cpp into C modules

Adds gsr_recorder_settings, a library-friendly settings struct embedded in
args_parser, so the new modules don't depend on the argument parser.
The codec functions return errors instead of exiting.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/ffmpeg_utils.c b/src/ffmpeg_utils.c
new file mode 100644
index 0000000..ce239a1
--- /dev/null
+++ b/src/ffmpeg_utils.c
@@ -0,0 +1,12 @@
+#include "../include/ffmpeg_utils.h"
+
+#include <string.h>
+#include <libavutil/error.h>
+
+static _Thread_local char av_error_buffer[AV_ERROR_MAX_STRING_SIZE];
+
+const char* gsr_av_error_to_string(int err) {
+    if(av_strerror(err, av_error_buffer, sizeof(av_error_buffer)) < 0)
+        strcpy(av_error_buffer, "Unknown error");
+    return av_error_buffer;
+}