tools/target_dec_fuzzer: Adjust VP7 threshold

[ffmpeg] / tools / target_dec_fuzzer.c

diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 973705f1e9d09e2b2d62e9d47dfeed23be962501..a2c59be318f571d550c95ab1b56b11211cbd4aa9 100644 (file)
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -54,6 +54,9 @@
 #include "libavcodec/bytestream.h"
 #include "libavformat/avformat.h"
 
+//For FF_SANE_NB_CHANNELS, so we dont waste energy testing things that will get instantly rejected
+#include "libavcodec/internal.h"
+
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
 
 extern AVCodec * codec_list[];
@@ -90,6 +93,9 @@ const uint32_t maxiteration = 8096;
 const uint64_t maxpixels_per_frame = 4096 * 4096;
 uint64_t maxpixels;
 
+const uint64_t maxsamples_per_frame = 256*1024*32;
+uint64_t maxsamples;
+
 static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL;
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
@@ -98,6 +104,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     const uint8_t *end = data + size;
     uint32_t it = 0;
     uint64_t ec_pixels = 0;
+    uint64_t nb_samples = 0;
     int (*decode_handler)(AVCodecContext *avctx, AVFrame *picture,
                           int *got_picture_ptr,
                           const AVPacket *avpkt) = NULL;
@@ -126,8 +133,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AVMEDIA_TYPE_SUBTITLE: decode_handler = subtitle_handler     ; break;
     }
     maxpixels = maxpixels_per_frame * maxiteration;
+    maxsamples = maxsamples_per_frame * maxiteration;
     switch (c->id) {
         // Allows a small input to generate gigantic output
+    case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
     case AV_CODEC_ID_DIRAC:     maxpixels /= 8192; break;
     case AV_CODEC_ID_MSRLE:     maxpixels /= 16;  break;
     case AV_CODEC_ID_QTRLE:     maxpixels /= 16;  break;
@@ -141,8 +150,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AV_CODEC_ID_INDEO4:    maxpixels /= 128; break;
     case AV_CODEC_ID_LSCR:        maxpixels /= 16; break;
     case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
+    case AV_CODEC_ID_MSS2:        maxpixels /= 16384; break;
     case AV_CODEC_ID_SNOW:        maxpixels /= 128; break;
     case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
+    case AV_CODEC_ID_VP7:         maxpixels /= 256;  break;
     }
 
 
@@ -155,6 +166,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
     ctx->refcounted_frames = 1; //To reduce false positive timeouts and focus testing on the refcounted API
 
+    ctx->max_samples = maxsamples_per_frame;
+
     if (size > 1024) {
         GetByteContext gbc;
         int extradata_size;
@@ -169,6 +182,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
             parser = av_parser_init(c->id);
 
         extradata_size = bytestream2_get_le32(&gbc);
+
+        ctx->sample_rate                        = bytestream2_get_le32(&gbc);
+        ctx->channels                           = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
+
         if (extradata_size < size) {
             ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
             if (ctx->extradata) {
@@ -250,12 +267,16 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
             av_frame_unref(frame);
             int ret = decode_handler(ctx, frame, &got_frame, &avpkt);
 
-            ec_pixels += ctx->width * ctx->height;
+            ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
             if (it > 20 || ec_pixels > 4 * ctx->max_pixels)
                 ctx->error_concealment = 0;
             if (ec_pixels > maxpixels)
                 goto maximums_reached;
 
+            nb_samples += frame->nb_samples;
+            if (nb_samples > maxsamples)
+                goto maximums_reached;
+
             if (ret <= 0 || ret > avpkt.size)
                break;
             if (ctx->codec_type != AVMEDIA_TYPE_AUDIO)
@@ -277,7 +298,7 @@ maximums_reached:
         decode_handler(ctx, frame, &got_frame, &avpkt);
     } while (got_frame == 1 && it++ < maxiteration);
 
-    fprintf(stderr, "pixels decoded: %"PRId64", iterations: %d\n", ec_pixels, it);
+    fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
 
     av_frame_free(&frame);
     avcodec_free_context(&ctx);