From: Andre Noll <maan@systemlinux.org>
Date: Sun, 13 May 2012 19:54:46 +0000 (+0200)
Subject: oggdec: Realloc buffer to save memory.
X-Git-Tag: v0.4.11~13^2~4
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=c7e2f73900021e5b3f655c91a7cc0fdda76bd0ec

oggdec: Realloc buffer to save memory.

The ogg/vorbis decoder always allocates 32K buffers for the decoded
output data. If the buffer could not be filled completely due to
insufficient input data being available, the partially filled 32K
buffer is added to the output buffer tree.

This patch truncates (reallocates) the buffer if this has happened,
thereby reducing the memory footprint of the decoder.
---

diff --git a/oggdec_filter.c b/oggdec_filter.c
index 77356f32..16c8d907 100644
--- a/oggdec_filter.c
+++ b/oggdec_filter.c
@@ -241,9 +241,11 @@ static void ogg_post_select(__a_unused struct sched *s, struct task *t)
 		have = 0;
 	}
 	pod->have_more = (ret > 0);
-	if (have > 0)
+	if (have > 0) {
+		if (have < OGGDEC_OUTPUT_CHUNK_SIZE)
+			buf = para_realloc(buf, have);
 		btr_add_output(buf, have, btrn);
-	else
+	} else
 		free(buf);
 	if (ret == OV_HOLE) /* avoid buffer underruns */
 		fn->min_iqs = 9000;