mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
8e30502abe
Fixes: left shift of negative value -14336 Fixes: 20298/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AC3_FIXED_fuzzer-5675484201615360 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
199 lines
6.6 KiB
C
199 lines
6.6 KiB
C
/*
|
|
* Copyright (c) 2012
|
|
* MIPS Technologies, Inc., California.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* Author: Stanislav Ocovaj (socovaj@mips.com)
|
|
*
|
|
* AC3 fixed-point decoder for MIPS platforms
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#define FFT_FLOAT 0
|
|
#define USE_FIXED 1
|
|
#define FFT_FIXED_32 1
|
|
#include "ac3dec.h"
|
|
|
|
|
|
static const int end_freq_inv_tab[8] =
|
|
{
|
|
50529027, 44278013, 39403370, 32292987, 27356480, 23729101, 20951060, 18755316
|
|
};
|
|
|
|
static void scale_coefs (
|
|
int32_t *dst,
|
|
const int32_t *src,
|
|
int dynrng,
|
|
int len)
|
|
{
|
|
int i, shift;
|
|
unsigned mul, round;
|
|
int temp, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
|
|
|
|
mul = (dynrng & 0x1f) + 0x20;
|
|
shift = 4 - (sign_extend(dynrng, 9) >> 5);
|
|
if (shift > 0 ) {
|
|
round = 1 << (shift-1);
|
|
for (i=0; i<len; i+=8) {
|
|
|
|
temp = src[i] * mul;
|
|
temp1 = src[i+1] * mul;
|
|
temp = temp + round;
|
|
temp2 = src[i+2] * mul;
|
|
|
|
temp1 = temp1 + round;
|
|
dst[i] = temp >> shift;
|
|
temp3 = src[i+3] * mul;
|
|
temp2 = temp2 + round;
|
|
|
|
dst[i+1] = temp1 >> shift;
|
|
temp4 = src[i + 4] * mul;
|
|
temp3 = temp3 + round;
|
|
dst[i+2] = temp2 >> shift;
|
|
|
|
temp5 = src[i+5] * mul;
|
|
temp4 = temp4 + round;
|
|
dst[i+3] = temp3 >> shift;
|
|
temp6 = src[i+6] * mul;
|
|
|
|
dst[i+4] = temp4 >> shift;
|
|
temp5 = temp5 + round;
|
|
temp7 = src[i+7] * mul;
|
|
temp6 = temp6 + round;
|
|
|
|
dst[i+5] = temp5 >> shift;
|
|
temp7 = temp7 + round;
|
|
dst[i+6] = temp6 >> shift;
|
|
dst[i+7] = temp7 >> shift;
|
|
|
|
}
|
|
} else {
|
|
shift = -shift;
|
|
mul <<= shift;
|
|
for (i=0; i<len; i+=8) {
|
|
|
|
temp = src[i] * mul;
|
|
temp1 = src[i+1] * mul;
|
|
temp2 = src[i+2] * mul;
|
|
|
|
dst[i] = temp;
|
|
temp3 = src[i+3] * mul;
|
|
|
|
dst[i+1] = temp1;
|
|
temp4 = src[i + 4] * mul;
|
|
dst[i+2] = temp2;
|
|
|
|
temp5 = src[i+5] * mul;
|
|
dst[i+3] = temp3;
|
|
temp6 = src[i+6] * mul;
|
|
|
|
dst[i+4] = temp4;
|
|
temp7 = src[i+7] * mul;
|
|
|
|
dst[i+5] = temp5;
|
|
dst[i+6] = temp6;
|
|
dst[i+7] = temp7;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Downmix samples from original signal to stereo or mono (this is for 16-bit samples
|
|
* and fixed point decoder - original (for 32-bit samples) is in ac3dsp.c).
|
|
*/
|
|
static void ac3_downmix_c_fixed16(int16_t **samples, int16_t **matrix,
|
|
int out_ch, int in_ch, int len)
|
|
{
|
|
int i, j;
|
|
int v0, v1;
|
|
if (out_ch == 2) {
|
|
for (i = 0; i < len; i++) {
|
|
v0 = v1 = 0;
|
|
for (j = 0; j < in_ch; j++) {
|
|
v0 += samples[j][i] * matrix[0][j];
|
|
v1 += samples[j][i] * matrix[1][j];
|
|
}
|
|
samples[0][i] = (v0+2048)>>12;
|
|
samples[1][i] = (v1+2048)>>12;
|
|
}
|
|
} else if (out_ch == 1) {
|
|
for (i = 0; i < len; i++) {
|
|
v0 = 0;
|
|
for (j = 0; j < in_ch; j++)
|
|
v0 += samples[j][i] * matrix[0][j];
|
|
samples[0][i] = (v0+2048)>>12;
|
|
}
|
|
}
|
|
}
|
|
|
|
#include "eac3dec.c"
|
|
#include "ac3dec.c"
|
|
|
|
static const AVOption options[] = {
|
|
{ "cons_noisegen", "enable consistent noise generation", OFFSET(consistent_noise_generation), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, PAR },
|
|
{ "drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), AV_OPT_TYPE_FLOAT, {.dbl = 1.0}, 0.0, 6.0, PAR },
|
|
{ "heavy_compr", "enable heavy dynamic range compression", OFFSET(heavy_compression), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, PAR },
|
|
{ NULL},
|
|
};
|
|
|
|
static const AVClass ac3_decoder_class = {
|
|
.class_name = "Fixed-Point AC-3 Decoder",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_ac3_fixed_decoder = {
|
|
.name = "ac3_fixed",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = AV_CODEC_ID_AC3,
|
|
.priv_data_size = sizeof (AC3DecodeContext),
|
|
.init = ac3_decode_init,
|
|
.close = ac3_decode_end,
|
|
.decode = ac3_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
|
|
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
|
|
AV_SAMPLE_FMT_NONE },
|
|
.priv_class = &ac3_decoder_class,
|
|
};
|