[FFmpeg-devel] [PATCH] add tools/target_swr_fuzzer

[Michael Niedermayer <michael@niedermayer.cc>]

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 Makefile                  |   2 +
 tools/Makefile            |   3 +
 tools/target_swr_fuzzer.c | 161 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 166 insertions(+)
 create mode 100644 tools/target_swr_fuzzer.c

diff --git a/Makefile b/Makefile
index 4c3af09fec4..b350d7748f5 100644
--- a/Makefile
+++ b/Makefile
@@ -70,6 +70,8 @@ tools/target_io_dem_fuzzer$(EXESUF): tools/target_io_dem_fuzzer.o $(FF_DEP_LIBS)
 tools/target_sws_fuzzer$(EXESUF): tools/target_sws_fuzzer.o $(FF_DEP_LIBS)
 	$(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)
 
+tools/target_swr_fuzzer$(EXESUF): tools/target_swr_fuzzer.o $(FF_DEP_LIBS)
+	$(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)
 
 tools/enum_options$(EXESUF): ELIBS = $(FF_EXTRALIBS)
 tools/enum_options$(EXESUF): $(FF_DEP_LIBS)
diff --git a/tools/Makefile b/tools/Makefile
index 2a11fa0ae62..7ae6e3cb75d 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -23,6 +23,9 @@ tools/target_io_dem_fuzzer.o: tools/target_dem_fuzzer.c
 tools/target_sws_fuzzer.o: tools/target_sws_fuzzer.c
 	$(COMPILE_C)
 
+tools/target_swr_fuzzer.o: tools/target_swr_fuzzer.c
+	$(COMPILE_C)
+
 tools/enc_recon_frame_test$(EXESUF): tools/decode_simple.o
 tools/venc_data_dump$(EXESUF): tools/decode_simple.o
 tools/scale_slice_test$(EXESUF): tools/decode_simple.o
diff --git a/tools/target_swr_fuzzer.c b/tools/target_swr_fuzzer.c
new file mode 100644
index 00000000000..f235b5453ec
--- /dev/null
+++ b/tools/target_swr_fuzzer.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2024 Michael Niedermayer <michael-ffmpeg@niedermayer.cc>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/cpu.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+
+#include "libavcodec/bytestream.h"
+
+#include "libswresample/swresample.h"
+
+#define SWR_CH_MAX 32
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+static const enum AVSampleFormat formats[] = {
+    AV_SAMPLE_FMT_U8,
+    AV_SAMPLE_FMT_U8P,
+    AV_SAMPLE_FMT_S16,
+    AV_SAMPLE_FMT_S16P,
+    AV_SAMPLE_FMT_S32,
+    AV_SAMPLE_FMT_S32P,
+    AV_SAMPLE_FMT_FLT,
+    AV_SAMPLE_FMT_FLTP,
+    AV_SAMPLE_FMT_DBL,
+    AV_SAMPLE_FMT_DBLP,
+};
+
+static const AVChannelLayout layouts[]={
+    AV_CHANNEL_LAYOUT_MONO               ,
+    AV_CHANNEL_LAYOUT_STEREO             ,
+    AV_CHANNEL_LAYOUT_2_1                ,
+    AV_CHANNEL_LAYOUT_SURROUND           ,
+    AV_CHANNEL_LAYOUT_4POINT0            ,
+    AV_CHANNEL_LAYOUT_2_2                ,
+    AV_CHANNEL_LAYOUT_QUAD               ,
+    AV_CHANNEL_LAYOUT_5POINT0            ,
+    AV_CHANNEL_LAYOUT_5POINT1            ,
+    AV_CHANNEL_LAYOUT_5POINT0_BACK       ,
+    AV_CHANNEL_LAYOUT_5POINT1_BACK       ,
+    AV_CHANNEL_LAYOUT_7POINT0            ,
+    AV_CHANNEL_LAYOUT_7POINT1            ,
+    AV_CHANNEL_LAYOUT_7POINT1_WIDE       ,
+};
+
+static void setup_array(uint8_t *out[SWR_CH_MAX], uint8_t *in, enum AVSampleFormat format, int samples){
+    if(av_sample_fmt_is_planar(format)){
+        int i;
+        int plane_size= av_get_bytes_per_sample(format&0xFF)*samples;
+        format&=0xFF;
+        for(i=0; i<SWR_CH_MAX; i++){
+            out[i]= in + i*plane_size;
+        }
+    }else{
+        out[0]= in;
+    }
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+    const uint8_t *end = data + size;
+    struct SwrContext * swr= NULL;
+    AVChannelLayout in_ch_layout = { 0 }, out_ch_layout = { 0 };
+    enum AVSampleFormat  in_sample_fmt = AV_SAMPLE_FMT_S16P;
+    enum AVSampleFormat out_sample_fmt = AV_SAMPLE_FMT_S16P;
+    int  in_sample_rate = 44100;
+    int out_sample_rate = 44100;
+    int in_ch_count, out_ch_count;
+    char  in_layout_string[256];
+    char out_layout_string[256];
+    uint8_t * ain[SWR_CH_MAX];
+    uint8_t *aout[SWR_CH_MAX];
+    uint8_t *out_data;
+    int in_sample_nb;
+    int out_sample_nb = size;
+    int count;
+
+    if (size > 128) {
+        GetByteContext gbc;
+        int64_t flags64;
+
+        size -= 128;
+        bytestream2_init(&gbc, data + size, 128);
+         in_sample_rate = bytestream2_get_le16(&gbc) + 1;
+        out_sample_rate = bytestream2_get_le16(&gbc) + 1;
+         in_sample_fmt  = formats[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(formats)];
+        out_sample_fmt  = formats[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(formats)];
+        av_channel_layout_copy(& in_ch_layout,  &layouts[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(layouts)]);
+        av_channel_layout_copy(&out_ch_layout,  &layouts[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(layouts)]);
+
+        out_sample_nb = bytestream2_get_le32(&gbc);
+
+        flags64 = bytestream2_get_le64(&gbc);
+        if (flags64 & 0x10)
+            av_force_cpu_flags(0);
+    } else {
+        av_channel_layout_copy(& in_ch_layout,  &layouts[0]);
+        av_channel_layout_copy(&out_ch_layout,  &layouts[0]);
+    }
+
+     in_ch_count=  in_ch_layout.nb_channels;
+    out_ch_count= out_ch_layout.nb_channels;
+    av_channel_layout_describe(& in_ch_layout,  in_layout_string, sizeof( in_layout_string));
+    av_channel_layout_describe(&out_ch_layout, out_layout_string, sizeof(out_layout_string));
+
+    fprintf(stderr, "%s %d %s -> %s %d %s\n",
+            av_get_sample_fmt_name( in_sample_fmt),  in_sample_rate,  in_layout_string,
+            av_get_sample_fmt_name(out_sample_fmt), out_sample_rate, out_layout_string);
+
+    if (swr_alloc_set_opts2(&swr, &out_ch_layout, out_sample_fmt, out_sample_rate,
+                                  &in_ch_layout,   in_sample_fmt,  in_sample_rate,
+                                  0, 0) < 0) {
+        fprintf(stderr, "Failed swr_alloc_set_opts2()\n");
+        goto end;
+    }
+
+    if(swr_init(swr) < 0) {
+        fprintf(stderr, "Failed swr_init()\n");
+        goto end;
+    }
+
+     in_sample_nb = size / (in_ch_count * av_get_bytes_per_sample(in_sample_fmt));
+    out_sample_nb = out_sample_nb % (av_rescale(in_sample_nb, 2*out_sample_rate, in_sample_rate) + 1);
+
+    out_data = av_malloc(out_sample_nb * out_ch_count * av_get_bytes_per_sample(out_sample_fmt));
+    if (!out_data)
+        goto end;
+
+    setup_array(ain , (uint8_t*)data,  in_sample_fmt,  in_sample_nb);
+    setup_array(aout,       out_data, out_sample_fmt, out_sample_nb);
+
+    count = swr_convert(swr, aout, out_sample_nb, (const uint8_t **)ain, in_sample_nb);
+
+    av_freep(&out_data);
+
+end:
+    swr_free(&swr);
+
+    return 0;
+}
-- 
2.45.2

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