From: Andre Noll <maan@tuebingen.mpg.de>
Date: Sat, 28 Aug 2021 18:29:06 +0000 (+0200)
Subject: mp4: Simplify mp4_num_samples().
X-Git-Tag: v0.7.1~7^2~6
X-Git-Url: http://git.tuebingen.mpg.de/?a=commitdiff_plain;h=76d113c01c9d97a43c361252fef65ba4b1e4da6c;p=paraslash.git

mp4: Simplify mp4_num_samples().

We don't need to iterate over the entries of the stts_sample_count
array because the number stored in the stsz_sample_count field should
be identical to the sum of the sample counts.
---

diff --git a/mp4.c b/mp4.c
index 9e33eb4c..381c9a21 100644
--- a/mp4.c
+++ b/mp4.c
@@ -722,12 +722,7 @@ uint16_t mp4_get_channel_count(const struct mp4 *f)
 
 uint32_t mp4_num_samples(const struct mp4 *f)
 {
-	const struct mp4_track *t = &f->track;
-	uint32_t total = 0;
-
-	for (uint32_t n = 0; n < t->stts_entry_count; n++)
-		total += t->stts_sample_count[n];
-	return total;
+	return f->track.stsz_sample_count;
 }
 
 int mp4_open_meta(const struct mp4_callback *cb, struct mp4 **result)