ffmpeg: fixed seek integer overflow

The "current" variable is used for calculating the seek destination, and was declared as "int". With very long song files, the 32 bit integer can overflow. ffmpeg expects an int64_t, which is very unlikely to overflow. Switch to int64_t.

ffmpeg: fixed seek integer overflow
824d299e · Max Kellermann · f3b73b82 · 824d299e · 824d299e
Commit 824d299e authored Feb 03, 2009 by Max Kellermann
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Showing with 5 additions and 3 deletions

NEWS NEWS +1 -0

ffmpeg_plugin.c src/decoder/ffmpeg_plugin.c +4 -3

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--- a/NEWS
+++ b/NEWS
@@ -39,6 +39,7 @@ ver 0.14.2 (2009/??/??)
  - ffmpeg: added support for the tags comment, genre, year
  - ffmpeg: don't warn of empty packet output
  - ffmpeg: check if the time stamp is valid
+  - ffmpeg: fixed seek integer overflow
  - wavpack: pass NULL if the .wvc file fails to open
  - mikmod: call MikMod_Exit() only in the finish() method
 * audio outputs:

--- a/src/decoder/ffmpeg_plugin.c
+++ b/src/decoder/ffmpeg_plugin.c
@@ -264,7 +264,7 @@ ffmpeg_decode_internal(struct ffmpeg_context *ctx)
 	AVPacket packet;
 	struct audio_format audio_format;
 	enum decoder_command cmd;
-	int current, total_time;
+	int total_time;

 	total_time = 0;

@@ -306,9 +306,10 @@ ffmpeg_decode_internal(struct ffmpeg_context *ctx)
 		av_free_packet(&packet);

 		if (cmd == DECODE_COMMAND_SEEK) {
-			current = decoder_seek_where(decoder) * AV_TIME_BASE;
+			int64_t where =
+				decoder_seek_where(decoder) * AV_TIME_BASE;

-			if (av_seek_frame(format_context, -1, current, 0) < 0)
+			if (av_seek_frame(format_context, -1, where, 0) < 0)
 				decoder_seek_error(decoder);
 			else
 				decoder_command_finished(decoder);