X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=ffmpeg_util.cpp;fp=ffmpeg_util.cpp;h=e348d0a21c27e95fb799a786c7861f1063552127;hb=ad62963eb4dc6407698e8569ae175f6d43c9b018;hp=0000000000000000000000000000000000000000;hpb=73ddb883aaf76a76d8c03730e587ac396255c0c9;p=nageru

diff --git a/ffmpeg_util.cpp b/ffmpeg_util.cpp
new file mode 100644
index 0000000..e348d0a
--- /dev/null
+++ b/ffmpeg_util.cpp
@@ -0,0 +1,75 @@
+#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;
+}
+