--- /dev/null
+#include "ffmpeg_util.h"
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
+
+#include "flags.h"
+
+using namespace std;
+
+string search_for_file(const string &filename)
+{
+ if (!filename.empty() && filename[0] == '/') {
+ // Absolute path.
+ return filename;
+ }
+
+ // See if we match ^[a-z]:/, which is probably a URL of some sort
+ // (FFmpeg understands various forms of these).
+ for (size_t i = 0; i < filename.size() - 1; ++i) {
+ if (filename[i] == ':' && filename[i + 1] == '/') {
+ return filename;
+ }
+ if (!isalpha(filename[i])) {
+ break;
+ }
+ }
+
+ // Look for the file in all theme_dirs until we find one;
+ // that will be the permanent resolution of this file, whether
+ // it is actually valid or not.
+ // We store errors from all the attempts, and show them
+ // once we know we can't find any of them.
+ vector<string> errors;
+ for (const string &dir : global_flags.theme_dirs) {
+ string pathname = dir + "/" + filename;
+ if (access(pathname.c_str(), O_RDONLY) == 0) {
+ return pathname;
+ } else {
+ char buf[512];
+ snprintf(buf, sizeof(buf), "%s: %s", pathname.c_str(), strerror(errno));
+ errors.push_back(buf);
+ }
+ }
+
+ for (const string &error : errors) {
+ fprintf(stderr, "%s\n", error.c_str());
+ }
+ return "";
+}
+
+string search_for_file_or_die(const string &filename)
+{
+ string pathname = search_for_file(filename);
+ if (pathname.empty()) {
+ fprintf(stderr, "Couldn't find %s in any directory in --theme-dirs, exiting.\n",
+ filename.c_str());
+ exit(1);
+ }
+ return pathname;
+}
+
+int find_stream_index(AVFormatContext *ctx, AVMediaType media_type)
+{
+ for (unsigned i = 0; i < ctx->nb_streams; ++i) {
+ if (ctx->streams[i]->codecpar->codec_type == media_type) {
+ return i;
+ }
+ }
+ return -1;
+}
+