From f5a29040feebefcec4472a67b3396b6bfae84f33 Mon Sep 17 00:00:00 2001 From: Andre Date: Tue, 30 May 2006 00:51:32 +0200 Subject: [PATCH] aacdec: detect buffer overrun and return an errror. Also, increase the output buffer size and don't try to decode if the output buffer is already filled at least 60%. --- aacdec.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/aacdec.c b/aacdec.c index fe046b70..e1841d98 100644 --- a/aacdec.c +++ b/aacdec.c @@ -31,9 +31,8 @@ #include "string.h" #include "aac.h" -#define MAX_CHANNELS 6 /** the output buffer size */ -#define AAC_OUTBUF_SIZE (FAAD_MIN_STREAMSIZE * MAX_CHANNELS) +#define AAC_OUTBUF_SIZE (32 * 1024) /** * data specific to the aacdec filter @@ -59,9 +58,9 @@ static ssize_t aacdec(char *input_buffer, size_t len, struct filter_node *fn) unsigned char *inbuf = (unsigned char*)input_buffer; size_t skip, consumed = 0; - if (fn->loaded > fn->bufsize * 4 / 5) + if (fn->loaded > fn->bufsize * 3 / 5) return 0; - if (len < 1000 && !*fc->input_eof) + if (len < 2048 && !*fc->input_eof) return 0; if (!padd->initialized) { @@ -112,7 +111,7 @@ static ssize_t aacdec(char *input_buffer, size_t len, struct filter_node *fn) if (padd->consumed_total < padd->entry) consumed = padd->entry - padd->consumed_total; } - for (; consumed < len;consumed++) + for (; consumed < len; consumed++) if ((inbuf[consumed] & 0xfe) == 0x20) break; if (consumed >= len) @@ -121,7 +120,7 @@ static ssize_t aacdec(char *input_buffer, size_t len, struct filter_node *fn) outbuffer = NeAACDecDecode(padd->handle, &padd->frame_info, p, len - consumed); ret = -E_AAC_DECODE; - if (padd->frame_info.error != 0) { + if (padd->frame_info.error) { PARA_ERROR_LOG("frame_error: %d, consumed: %zu + %zd + %lu\n", padd->frame_info.error, padd->consumed_total, consumed, padd->frame_info.bytesconsumed); @@ -134,6 +133,9 @@ static ssize_t aacdec(char *input_buffer, size_t len, struct filter_node *fn) ret = consumed; if (!padd->frame_info.samples) goto out; + ret = -E_AAC_OVERRUN; + if (padd->frame_info.samples * 2 + fn->loaded > fn->bufsize) + goto out; for (i = 0; i < padd->frame_info.samples; i++) { short *s = (short *)outbuffer; fn->buf[fn->loaded++] = s[i] & 0xff; -- 2.39.2