X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=fecdec_filter.c;h=bc5300627dbdfb7a1ab1bf37f0ac5aa681dbd4a2;hp=30ac818c360873f6aedadd19e55ca7e0f6209550;hb=52e437d1054c5f62f0538b3934419a3b71aa3d83;hpb=a7f31bd369e5eda15361bef5aee2529bdb6eb89e;ds=sidebyside

diff --git a/fecdec_filter.c b/fecdec_filter.c
index 30ac818c..bc530062 100644
--- a/fecdec_filter.c
+++ b/fecdec_filter.c
@@ -27,10 +27,8 @@
  */
 #define NUM_FEC_GROUPS 3
 
-/** Default size of the output buffer of the fecdec filter. */
-#define FECDEC_DEFAULT_OUTBUF_SIZE (16 * 1024)
-/** Maximal size of the output buffer of the fecdec filter. */
-#define FECDEC_MAX_OUTBUF_SIZE (1024 * 1024)
+/** Size of the output buffer of the fecdec filter. */
+#define FECDEC_OUTBUF_SIZE (1024 * 1024) /* FIXME: This has to depend on the fec params */
 
 /** Data read from the header of a slice. */
 struct fec_header {
@@ -253,7 +251,7 @@ static enum fec_group_usability group_is_usable(struct fecdec_group *fg,
 static int decode_group(struct fecdec_group *fg, struct filter_node *fn)
 {
 	int i, ret, sb = fg->h.slice_bytes;
-	size_t written = 0, need;
+	size_t written = 0;
 	struct private_fecdec_data *pfd = fn->private_data;
 	enum fec_group_usability u = group_is_usable(fg, pfd);
 
@@ -276,18 +274,12 @@ static int decode_group(struct fecdec_group *fg, struct filter_node *fn)
 	PARA_DEBUG_LOG("writing group %d (%d/%d decoded data bytes)\n",
 		fg->h.group_num, fg->h.group_bytes,
 		fg->h.data_slices_per_group * sb);
-	need = fn->loaded + (fg->h.data_slices_per_group - i)* sb;
-	if (need > fn->bufsize) {
-		fn->bufsize = PARA_MAX(fn->bufsize * 2, need);
-		if (fn->bufsize > FECDEC_MAX_OUTBUF_SIZE)
-			return -E_FECDEC_OVERRUN;
-		PARA_INFO_LOG("increasing fec buf to %zu\n", fn->bufsize);
-		fn->buf = para_realloc(fn->buf, fn->bufsize);
-	}
 	for (; i < fg->h.data_slices_per_group; i++) {
 		size_t n = sb;
 		if (n + written > fg->h.group_bytes)
 			n = fg->h.group_bytes - written;
+		if (fn->loaded + n > fn->bufsize)
+			return -E_FECDEC_OVERRUN;
 		memcpy(fn->buf + fn->loaded, fg->data[i], n);
 		fn->loaded += n;
 		written += n;
@@ -394,7 +386,7 @@ static void fecdec_close(struct filter_node *fn)
 
 static void fecdec_open(struct filter_node *fn)
 {
-	fn->bufsize = FECDEC_DEFAULT_OUTBUF_SIZE;
+	fn->bufsize = FECDEC_OUTBUF_SIZE;
 	fn->buf = para_malloc(fn->bufsize);
 	fn->private_data = para_calloc(sizeof(struct private_fecdec_data));
 	fn->loaded = 0;