From: Uwe Hermann <redacted>
Date: Wed, 18 Apr 2018 21:25:25 +0000 (+0200)
Subject: input/wav: Put internal buffer on the heap instead of the stack.
X-Git-Url: https://sigrok.org/gitweb/?a=commitdiff_plain;h=2cff7a2ba7d516db7f1f0c376bddd2852abfc52c;p=libsigrok.git

input/wav: Put internal buffer on the heap instead of the stack.

Increasing the buffer/chunk size could cause issues when trying to put
large arrays on the stack.
---

diff --git a/src/input/wav.c b/src/input/wav.c
index a1751243..e5ab0891 100644
--- a/src/input/wav.c
+++ b/src/input/wav.c
@@ -189,15 +189,15 @@ static void send_chunk(const struct sr_input *in, int offset, int num_samples)
 	struct sr_analog_meaning meaning;
 	struct sr_analog_spec spec;
 	struct context *inc;
-	float fdata[CHUNK_SIZE];
+	float *fdata;
 	int total_samples, samplenum;
 	char *s, *d;
 
 	inc = in->priv;
 
 	s = in->buf->str + offset;
+	fdata = g_malloc0(CHUNK_SIZE * sizeof(float));
 	d = (char *)fdata;
-	memset(fdata, 0, CHUNK_SIZE * sizeof(float));
 	total_samples = num_samples * inc->num_channels;
 	for (samplenum = 0; samplenum < total_samples; samplenum++) {
 		if (inc->fmt_code == WAVE_FORMAT_PCM_) {
@@ -238,6 +238,7 @@ static void send_chunk(const struct sr_input *in, int offset, int num_samples)
 	analog.meaning->mqflags = 0;
 	analog.meaning->unit = 0;
 	sr_session_send(in->sdi, &packet);
+	g_free(fdata);
 }
 
 static int process_buffer(struct sr_input *in)