Codecs: mp4: metadata: Fix time length in very large files

Fix 40 hours long book reported as 14 hours due to samples overflow

Change-Id: I5988d4492b1f51081fff921180de6fe384ab5f4f

2 files changed, 4 insertions, 6 deletions

diff --git a/lib/rbcodec/metadata/metadata.h b/lib/rbcodec/metadata/metadata.h
index 1a205a08eb..cab387e36c 100644
--- a/lib/rbcodec/metadata/metadata.h
+++ b/lib/rbcodec/metadata/metadata.h
@@ -259,7 +259,7 @@ struct mp3entry {
     int tail_trim;          /* Number of samples to remove from the end */
 
     /* Added for Vorbis, used by mp4 parser as well. */
-    unsigned long samples;  /* number of samples in track */
+    uint64_t samples;  /* number of samples in track */
 
     /* MP3 stream specific info */
     unsigned long frame_count; /* number of frames in the file (if VBR) */
diff --git a/lib/rbcodec/metadata/mp4.c b/lib/rbcodec/metadata/mp4.c
index 19e6b515c7..7686165a0d 100644
--- a/lib/rbcodec/metadata/mp4.c
+++ b/lib/rbcodec/metadata/mp4.c
@@ -707,13 +707,11 @@ static bool read_mp4_container(int fd, struct mp3entry* id3,
                      * need any further special handling. */
                     if (id3->codectype==AFMT_MP4_AAC_HE && l<=1024)
                     {
-                        id3->samples += n * l * 2;
+                        l *= 2;
                         id3->needs_upsampling_correction = true;
                     }
-                    else
-                    {
-                        id3->samples += n * l;
-                    }
+
+                    id3->samples += (uint64_t) n * l;
                 }
                 
                 size = 0;