From ec9d48da195950bafce32ff8f5f8e10c4440daca Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sat, 12 Oct 2019 22:34:03 +0200
Subject: [PATCH] tools/target_dec_fuzzer: Also fuzz keyframe & disposal flags
This should improve coverage
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
tools/target_dec_fuzzer.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 0047c9eed6..38e085bc57 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -109,6 +109,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
int *got_picture_ptr,
const AVPacket *avpkt) = NULL;
AVCodecParserContext *parser = NULL;
+ uint64_t keyframes = 0;
if (!c) {
@@ -191,6 +192,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
ctx->channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
ctx->block_align = bytestream2_get_le32(&gbc);
ctx->codec_tag = bytestream2_get_le32(&gbc);
+ keyframes = bytestream2_get_le64(&gbc);
if (extradata_size < size) {
ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
@@ -236,6 +238,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
if (res < 0)
error("Failed memory allocation");
memcpy(parsepkt.data, last, data - last);
+ parsepkt.flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
+ keyframes = (keyframes >> 2) + (keyframes<<62);
data += sizeof(fuzz_tag);
last = data;