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+/*
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+ * Copyright (c) 2024 Michael Niedermayer <michael-ffmpeg@niedermayer.cc>
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+ *
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+ * This file is part of FFmpeg.
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+ *
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+ * FFmpeg is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2.1 of the License, or (at your option) any later version.
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+ *
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+ * FFmpeg is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with FFmpeg; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+#include "config.h"
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+#include "libavutil/avassert.h"
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+#include "libavutil/avstring.h"
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+#include "libavutil/cpu.h"
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+#include "libavutil/imgutils.h"
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+#include "libavutil/intreadwrite.h"
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+#include "libavutil/mem.h"
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+#include "libavutil/opt.h"
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+
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+#include "libavcodec/bytestream.h"
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+
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+#include "libswresample/swresample.h"
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+
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+#define SWR_CH_MAX 32
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+
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+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
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+
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+static const enum AVSampleFormat formats[] = {
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+ AV_SAMPLE_FMT_U8,
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+ AV_SAMPLE_FMT_U8P,
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+ AV_SAMPLE_FMT_S16,
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+ AV_SAMPLE_FMT_S16P,
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+ AV_SAMPLE_FMT_S32,
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+ AV_SAMPLE_FMT_S32P,
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+ AV_SAMPLE_FMT_FLT,
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+ AV_SAMPLE_FMT_FLTP,
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+ AV_SAMPLE_FMT_DBL,
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+ AV_SAMPLE_FMT_DBLP,
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+};
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+
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+static const AVChannelLayout layouts[]={
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+ AV_CHANNEL_LAYOUT_MONO ,
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+ AV_CHANNEL_LAYOUT_STEREO ,
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+ AV_CHANNEL_LAYOUT_2_1 ,
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+ AV_CHANNEL_LAYOUT_SURROUND ,
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+ AV_CHANNEL_LAYOUT_4POINT0 ,
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+ AV_CHANNEL_LAYOUT_2_2 ,
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+ AV_CHANNEL_LAYOUT_QUAD ,
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+ AV_CHANNEL_LAYOUT_5POINT0 ,
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+ AV_CHANNEL_LAYOUT_5POINT1 ,
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+ AV_CHANNEL_LAYOUT_5POINT0_BACK ,
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+ AV_CHANNEL_LAYOUT_5POINT1_BACK ,
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+ AV_CHANNEL_LAYOUT_7POINT0 ,
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+ AV_CHANNEL_LAYOUT_7POINT1 ,
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+ AV_CHANNEL_LAYOUT_7POINT1_WIDE ,
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+ AV_CHANNEL_LAYOUT_22POINT2 ,
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+ AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK ,
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+};
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+
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+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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+ struct SwrContext * swr= NULL;
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+ AVChannelLayout in_ch_layout = AV_CHANNEL_LAYOUT_MONO, out_ch_layout = AV_CHANNEL_LAYOUT_MONO;
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+ enum AVSampleFormat in_sample_fmt = AV_SAMPLE_FMT_S16P;
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+ enum AVSampleFormat out_sample_fmt = AV_SAMPLE_FMT_S16P;
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+ int in_sample_rate = 44100;
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+ int out_sample_rate = 44100;
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+ int in_ch_count, out_ch_count;
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+ char in_layout_string[256];
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+ char out_layout_string[256];
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+ uint8_t * ain[SWR_CH_MAX];
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+ uint8_t *aout[SWR_CH_MAX];
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+ uint8_t *out_data;
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+ int in_sample_nb;
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+ int out_sample_nb = size;
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+ int count;
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+
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+ if (size > 128) {
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+ GetByteContext gbc;
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+ int64_t flags64;
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+
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+ size -= 128;
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+ bytestream2_init(&gbc, data + size, 128);
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+ in_sample_rate = bytestream2_get_le16(&gbc) + 1;
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+ out_sample_rate = bytestream2_get_le16(&gbc) + 1;
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+ in_sample_fmt = formats[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(formats)];
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+ out_sample_fmt = formats[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(formats)];
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+ av_channel_layout_copy(& in_ch_layout, &layouts[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(layouts)]);
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+ av_channel_layout_copy(&out_ch_layout, &layouts[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(layouts)]);
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+
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+ out_sample_nb = bytestream2_get_le32(&gbc);
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+
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+ flags64 = bytestream2_get_le64(&gbc);
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+ if (flags64 & 0x10)
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+ av_force_cpu_flags(0);
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+ }
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+
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+ in_ch_count= in_ch_layout.nb_channels;
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+ out_ch_count= out_ch_layout.nb_channels;
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+ av_channel_layout_describe(& in_ch_layout, in_layout_string, sizeof( in_layout_string));
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+ av_channel_layout_describe(&out_ch_layout, out_layout_string, sizeof(out_layout_string));
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+
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+ fprintf(stderr, "%s %d %s -> %s %d %s\n",
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+ av_get_sample_fmt_name( in_sample_fmt), in_sample_rate, in_layout_string,
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+ av_get_sample_fmt_name(out_sample_fmt), out_sample_rate, out_layout_string);
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+
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+ if (swr_alloc_set_opts2(&swr, &out_ch_layout, out_sample_fmt, out_sample_rate,
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+ &in_ch_layout, in_sample_fmt, in_sample_rate,
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+ 0, 0) < 0) {
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+ fprintf(stderr, "Failed swr_alloc_set_opts2()\n");
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+ goto end;
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+ }
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+
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+ if (swr_init(swr) < 0) {
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+ fprintf(stderr, "Failed swr_init()\n");
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+ goto end;
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+ }
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+
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+ in_sample_nb = size / (in_ch_count * av_get_bytes_per_sample(in_sample_fmt));
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+ out_sample_nb = out_sample_nb % (av_rescale(in_sample_nb, 2*out_sample_rate, in_sample_rate) + 1);
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+
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+ out_data = av_malloc(out_sample_nb * out_ch_count * av_get_bytes_per_sample(out_sample_fmt));
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+ if (!out_data)
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+ goto end;
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+
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+ av_samples_fill_arrays(ain , NULL, data, in_ch_count, in_sample_nb, in_sample_fmt, 1);
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+ av_samples_fill_arrays(aout, NULL, out_data, out_ch_count, out_sample_nb, out_sample_fmt, 1);
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+
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+ count = swr_convert(swr, aout, out_sample_nb, (const uint8_t **)ain, in_sample_nb);
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+
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+ av_freep(&out_data);
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+
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+end:
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+ swr_free(&swr);
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+
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+ return 0;
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+}
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Michael Niedermayer