mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-12 02:14:56 +02:00
![Michael Niedermayer](/assets/img/avatar_default.png)
The minimum header is 8 bytes, the smallest bitstream that is passed to the MB decode code is 4 bytes Fixes: Timeout (35sec -> 18sec) Fixes: 15800/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EATQI_fuzzer-5684154517159936 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
193 lines
5.8 KiB
C
193 lines
5.8 KiB
C
/*
|
|
* Electronic Arts TQI Video Decoder
|
|
* Copyright (c) 2007-2009 Peter Ross <pross@xvid.org>
|
|
*
|
|
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Electronic Arts TQI Video Decoder
|
|
* @author Peter Ross <pross@xvid.org>
|
|
* @see http://wiki.multimedia.cx/index.php?title=Electronic_Arts_TQI
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "blockdsp.h"
|
|
#include "bswapdsp.h"
|
|
#include "get_bits.h"
|
|
#include "aandcttab.h"
|
|
#include "eaidct.h"
|
|
#include "idctdsp.h"
|
|
#include "internal.h"
|
|
#include "mpeg12.h"
|
|
|
|
typedef struct TqiContext {
|
|
AVCodecContext *avctx;
|
|
GetBitContext gb;
|
|
BlockDSPContext bdsp;
|
|
BswapDSPContext bsdsp;
|
|
IDCTDSPContext idsp;
|
|
ScanTable intra_scantable;
|
|
|
|
void *bitstream_buf;
|
|
unsigned int bitstream_buf_size;
|
|
|
|
int mb_x, mb_y;
|
|
uint16_t intra_matrix[64];
|
|
int last_dc[3];
|
|
|
|
DECLARE_ALIGNED(32, int16_t, block)[6][64];
|
|
} TqiContext;
|
|
|
|
static av_cold int tqi_decode_init(AVCodecContext *avctx)
|
|
{
|
|
TqiContext *t = avctx->priv_data;
|
|
|
|
ff_blockdsp_init(&t->bdsp, avctx);
|
|
ff_bswapdsp_init(&t->bsdsp);
|
|
ff_idctdsp_init(&t->idsp, avctx);
|
|
ff_init_scantable_permutation(t->idsp.idct_permutation, FF_IDCT_PERM_NONE);
|
|
ff_init_scantable(t->idsp.idct_permutation, &t->intra_scantable, ff_zigzag_direct);
|
|
|
|
avctx->framerate = (AVRational){ 15, 1 };
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
|
ff_mpeg12_init_vlcs();
|
|
return 0;
|
|
}
|
|
|
|
static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64])
|
|
{
|
|
int n;
|
|
|
|
t->bdsp.clear_blocks(block[0]);
|
|
for (n = 0; n < 6; n++) {
|
|
int ret = ff_mpeg1_decode_block_intra(&t->gb,
|
|
t->intra_matrix,
|
|
t->intra_scantable.permutated,
|
|
t->last_dc, block[n], n, 1);
|
|
if (ret < 0) {
|
|
av_log(t->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
|
|
t->mb_x, t->mb_y);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame,
|
|
int16_t (*block)[64])
|
|
{
|
|
TqiContext *t = avctx->priv_data;
|
|
ptrdiff_t linesize = frame->linesize[0];
|
|
uint8_t *dest_y = frame->data[0] + t->mb_y * 16 * linesize + t->mb_x * 16;
|
|
uint8_t *dest_cb = frame->data[1] + t->mb_y * 8 * frame->linesize[1] + t->mb_x * 8;
|
|
uint8_t *dest_cr = frame->data[2] + t->mb_y * 8 * frame->linesize[2] + t->mb_x * 8;
|
|
|
|
ff_ea_idct_put_c(dest_y , linesize, block[0]);
|
|
ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
|
|
ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]);
|
|
ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
|
|
|
|
if (!(avctx->flags & AV_CODEC_FLAG_GRAY)) {
|
|
ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
|
|
ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
|
|
}
|
|
}
|
|
|
|
static void tqi_calculate_qtable(TqiContext *t, int quant)
|
|
{
|
|
const int64_t qscale = (215 - 2*quant)*5;
|
|
int i;
|
|
|
|
t->intra_matrix[0] = (ff_inv_aanscales[0] * ff_mpeg1_default_intra_matrix[0]) >> 11;
|
|
for(i=1; i<64; i++)
|
|
t->intra_matrix[i] = (ff_inv_aanscales[i] * ff_mpeg1_default_intra_matrix[i] * qscale + 32) >> 14;
|
|
}
|
|
|
|
static int tqi_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
const uint8_t *buf_end = buf+buf_size;
|
|
TqiContext *t = avctx->priv_data;
|
|
AVFrame *frame = data;
|
|
int ret, w, h;
|
|
|
|
if (buf_size < 12)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
t->avctx = avctx;
|
|
|
|
w = AV_RL16(&buf[0]);
|
|
h = AV_RL16(&buf[2]);
|
|
tqi_calculate_qtable(t, buf[4]);
|
|
buf += 8;
|
|
|
|
ret = ff_set_dimensions(avctx, w, h);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
|
|
return ret;
|
|
|
|
av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
|
|
buf_end - buf);
|
|
if (!t->bitstream_buf)
|
|
return AVERROR(ENOMEM);
|
|
t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
|
|
(buf_end - buf) / 4);
|
|
init_get_bits(&t->gb, t->bitstream_buf, 8 * (buf_end - buf));
|
|
|
|
t->last_dc[0] =
|
|
t->last_dc[1] =
|
|
t->last_dc[2] = 0;
|
|
for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) {
|
|
for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) {
|
|
if (tqi_decode_mb(t, t->block) < 0)
|
|
goto end;
|
|
tqi_idct_put(avctx, frame, t->block);
|
|
}
|
|
}
|
|
end:
|
|
|
|
*got_frame = 1;
|
|
return buf_size;
|
|
}
|
|
|
|
static av_cold int tqi_decode_end(AVCodecContext *avctx)
|
|
{
|
|
TqiContext *t = avctx->priv_data;
|
|
av_freep(&t->bitstream_buf);
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_eatqi_decoder = {
|
|
.name = "eatqi",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_TQI,
|
|
.priv_data_size = sizeof(TqiContext),
|
|
.init = tqi_decode_init,
|
|
.close = tqi_decode_end,
|
|
.decode = tqi_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
};
|