From 8e2a58f85f68077944bb5739f2327353a502ed70 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@tuebingen.mpg.de>
Date: Thu, 19 Aug 2021 16:08:46 +0200
Subject: [PATCH] mp4: Remove two unused arrays from struct mp4_track.

These arrays are allocated and initialized but their values are
never read.
---
 mp4.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/mp4.c b/mp4.c
index 09a3c743..c77cedd2 100644
--- a/mp4.c
+++ b/mp4.c
@@ -25,13 +25,11 @@ struct mp4_track {
 	/* stts */
 	uint32_t stts_entry_count;
 	uint32_t *stts_sample_count;
-	uint32_t *stts_sample_delta;
 
 	/* stsc */
 	uint32_t stsc_entry_count;
 	uint32_t *stsc_first_chunk;
 	uint32_t *stsc_samples_per_chunk;
-	uint32_t *stsc_sample_desc_index;
 
 	/* stsc */
 	uint32_t stco_entry_count;
@@ -493,13 +491,11 @@ static int read_stts(struct mp4 *f)
 		return ret;
 	t->stts_sample_count = para_malloc(t->stts_entry_count
 		* sizeof(int32_t));
-	t->stts_sample_delta = para_malloc(t->stts_entry_count
-		* sizeof (int32_t));
 	for (i = 0; i < t->stts_entry_count; i++) {
 		ret = read_int32(f, &t->stts_sample_count[i]);
 		if (ret <= 0)
 			return ret;
-		ret = read_int32(f, &t->stts_sample_delta[i]);
+		ret = read_int32(f, NULL); /* sample delta */
 		if (ret <= 0)
 			return ret;
 	}
@@ -528,9 +524,6 @@ static int read_stsc(struct mp4 *f)
 	t->stsc_first_chunk = para_malloc(t->stsc_entry_count * sizeof(int32_t));
 	t->stsc_samples_per_chunk = para_malloc(t->stsc_entry_count
 		* sizeof (int32_t));
-	t->stsc_sample_desc_index = para_malloc(t->stsc_entry_count *
-		sizeof (int32_t));
-
 	for (i = 0; i < t->stsc_entry_count; i++) {
 		ret = read_int32(f, &t->stsc_first_chunk[i]);
 		if (ret <= 0)
@@ -538,7 +531,7 @@ static int read_stsc(struct mp4 *f)
 		ret = read_int32(f, &t->stsc_samples_per_chunk[i]);
 		if (ret <= 0)
 			return ret;
-		ret = read_int32(f, &t->stsc_sample_desc_index[i]);
+		ret = read_int32(f, NULL); /* sample desc index */
 		if (ret <= 0)
 			return ret;
 	}
@@ -970,10 +963,8 @@ void mp4_close(struct mp4 *f)
 		if (f->track[i]) {
 			free(f->track[i]->stsz_table);
 			free(f->track[i]->stts_sample_count);
-			free(f->track[i]->stts_sample_delta);
 			free(f->track[i]->stsc_first_chunk);
 			free(f->track[i]->stsc_samples_per_chunk);
-			free(f->track[i]->stsc_sample_desc_index);
 			free(f->track[i]->stco_chunk_offset);
 			free(f->track[i]);
 		}
-- 
2.39.2