mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
b06cb15b9d
The function is used on unaligned buffers (such as those provided by AVPacket), accessing them as uint16_t causes SIGBUS crashes on architectures like SPARC. This fixes ubsan runtime error: load of misaligned address for type 'const uint16_t', which requires 2 byte alignment Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
|
|
* DCA compatible decoder data
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include "libavutil/error.h"
|
|
|
|
#include "dca.h"
|
|
#include "dca_syncwords.h"
|
|
#include "put_bits.h"
|
|
|
|
const uint32_t avpriv_dca_sample_rates[16] = {
|
|
0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0,
|
|
12000, 24000, 48000, 96000, 192000
|
|
};
|
|
|
|
int ff_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
|
|
int max_size)
|
|
{
|
|
uint32_t mrk;
|
|
int i, tmp;
|
|
PutBitContext pb;
|
|
|
|
if ((unsigned) src_size > (unsigned) max_size)
|
|
src_size = max_size;
|
|
|
|
mrk = AV_RB32(src);
|
|
switch (mrk) {
|
|
case DCA_SYNCWORD_CORE_BE:
|
|
memcpy(dst, src, src_size);
|
|
return src_size;
|
|
case DCA_SYNCWORD_CORE_LE:
|
|
for (i = 0; i < (src_size + 1) >> 1; i++) {
|
|
AV_WB16(dst, AV_RL16(src));
|
|
src += 2;
|
|
dst += 2;
|
|
}
|
|
return src_size;
|
|
case DCA_SYNCWORD_CORE_14B_BE:
|
|
case DCA_SYNCWORD_CORE_14B_LE:
|
|
init_put_bits(&pb, dst, max_size);
|
|
for (i = 0; i < (src_size + 1) >> 1; i++, src += 2) {
|
|
tmp = ((mrk == DCA_SYNCWORD_CORE_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF;
|
|
put_bits(&pb, 14, tmp);
|
|
}
|
|
flush_put_bits(&pb);
|
|
return (put_bits_count(&pb) + 7) >> 3;
|
|
default:
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|