mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-23 15:53:08 +00:00
5c5575c8dc
Fixes: signed integer overflow: 65535 * 65312 cannot be represented in type 'int' Fixes: 16704/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6294115603447808 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
251 lines
8.1 KiB
C
251 lines
8.1 KiB
C
/*
|
|
* CDXL demuxer
|
|
* Copyright (c) 2011-2012 Paul B Mahol
|
|
*
|
|
* 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 "libavutil/channel_layout.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/parseutils.h"
|
|
#include "libavutil/opt.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
#define CDXL_HEADER_SIZE 32
|
|
|
|
typedef struct CDXLDemuxContext {
|
|
AVClass *class;
|
|
int sample_rate;
|
|
char *framerate;
|
|
AVRational fps;
|
|
int read_chunk;
|
|
uint8_t header[CDXL_HEADER_SIZE];
|
|
int video_stream_index;
|
|
int audio_stream_index;
|
|
int64_t filesize;
|
|
} CDXLDemuxContext;
|
|
|
|
static int cdxl_read_probe(const AVProbeData *p)
|
|
{
|
|
int score = AVPROBE_SCORE_EXTENSION + 10;
|
|
|
|
if (p->buf_size < CDXL_HEADER_SIZE)
|
|
return 0;
|
|
|
|
/* reserved bytes should always be set to 0 */
|
|
if (AV_RN64(&p->buf[24]) || AV_RN16(&p->buf[10]))
|
|
return 0;
|
|
|
|
/* check type */
|
|
if (p->buf[0] != 1)
|
|
return 0;
|
|
|
|
/* check palette size */
|
|
if (AV_RB16(&p->buf[20]) > 512)
|
|
return 0;
|
|
|
|
/* check number of planes */
|
|
if (p->buf[18] || !p->buf[19])
|
|
return 0;
|
|
|
|
/* check widh and height */
|
|
if (!AV_RN16(&p->buf[14]) || !AV_RN16(&p->buf[16]))
|
|
return 0;
|
|
|
|
/* chunk size */
|
|
if (AV_RB32(&p->buf[2]) < AV_RB16(&p->buf[22]) + AV_RB16(&p->buf[20]) + CDXL_HEADER_SIZE)
|
|
return 0;
|
|
|
|
/* previous chunk size */
|
|
if (AV_RN32(&p->buf[6]))
|
|
score /= 2;
|
|
|
|
/* current frame number, usually starts from 1 */
|
|
if (AV_RB16(&p->buf[12]) != 1)
|
|
score /= 2;
|
|
|
|
return score;
|
|
}
|
|
|
|
static int cdxl_read_header(AVFormatContext *s)
|
|
{
|
|
CDXLDemuxContext *cdxl = s->priv_data;
|
|
int ret;
|
|
|
|
if (cdxl->framerate && (ret = av_parse_video_rate(&cdxl->fps, cdxl->framerate)) < 0) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Could not parse framerate: %s.\n", cdxl->framerate);
|
|
return ret;
|
|
}
|
|
|
|
cdxl->read_chunk = 0;
|
|
cdxl->video_stream_index = -1;
|
|
cdxl->audio_stream_index = -1;
|
|
|
|
cdxl->filesize = avio_size(s->pb);
|
|
|
|
s->ctx_flags |= AVFMTCTX_NOHEADER;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
CDXLDemuxContext *cdxl = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint32_t current_size, video_size, image_size;
|
|
uint16_t audio_size, palette_size, width, height;
|
|
int64_t pos;
|
|
int format, frames, ret;
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
pos = avio_tell(pb);
|
|
if (!cdxl->read_chunk &&
|
|
avio_read(pb, cdxl->header, CDXL_HEADER_SIZE) != CDXL_HEADER_SIZE)
|
|
return AVERROR_EOF;
|
|
if (cdxl->header[0] != 1) {
|
|
av_log(s, AV_LOG_ERROR, "non-standard cdxl file\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
format = cdxl->header[1] & 0xE0;
|
|
current_size = AV_RB32(&cdxl->header[2]);
|
|
width = AV_RB16(&cdxl->header[14]);
|
|
height = AV_RB16(&cdxl->header[16]);
|
|
palette_size = AV_RB16(&cdxl->header[20]);
|
|
audio_size = AV_RB16(&cdxl->header[22]);
|
|
if (cdxl->header[19] == 0 ||
|
|
FFALIGN(width, 16) * (uint64_t)height * cdxl->header[19] > INT_MAX)
|
|
return AVERROR_INVALIDDATA;
|
|
if (format == 0x20)
|
|
image_size = width * height * cdxl->header[19] / 8;
|
|
else
|
|
image_size = FFALIGN(width, 16) * height * cdxl->header[19] / 8;
|
|
video_size = palette_size + image_size;
|
|
|
|
if (palette_size > 512)
|
|
return AVERROR_INVALIDDATA;
|
|
if (current_size < (uint64_t)audio_size + video_size + CDXL_HEADER_SIZE)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (cdxl->read_chunk && audio_size) {
|
|
if (cdxl->audio_stream_index == -1) {
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_tag = 0;
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
|
|
if (cdxl->header[1] & 0x10) {
|
|
st->codecpar->channels = 2;
|
|
st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
|
|
} else {
|
|
st->codecpar->channels = 1;
|
|
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
|
|
}
|
|
st->codecpar->sample_rate = cdxl->sample_rate;
|
|
st->start_time = 0;
|
|
cdxl->audio_stream_index = st->index;
|
|
avpriv_set_pts_info(st, 64, 1, cdxl->sample_rate);
|
|
}
|
|
|
|
ret = av_get_packet(pb, pkt, audio_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
pkt->stream_index = cdxl->audio_stream_index;
|
|
pkt->pos = pos;
|
|
pkt->duration = audio_size;
|
|
cdxl->read_chunk = 0;
|
|
} else {
|
|
if (cdxl->video_stream_index == -1) {
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codecpar->codec_tag = 0;
|
|
st->codecpar->codec_id = AV_CODEC_ID_CDXL;
|
|
st->codecpar->width = width;
|
|
st->codecpar->height = height;
|
|
|
|
if (audio_size + video_size && cdxl->filesize > 0) {
|
|
frames = cdxl->filesize / (audio_size + video_size);
|
|
|
|
if(cdxl->framerate)
|
|
st->duration = frames;
|
|
else
|
|
st->duration = frames * (int64_t)audio_size;
|
|
}
|
|
st->start_time = 0;
|
|
cdxl->video_stream_index = st->index;
|
|
if (cdxl->framerate)
|
|
avpriv_set_pts_info(st, 64, cdxl->fps.den, cdxl->fps.num);
|
|
else
|
|
avpriv_set_pts_info(st, 64, 1, cdxl->sample_rate);
|
|
}
|
|
|
|
if (av_new_packet(pkt, video_size + CDXL_HEADER_SIZE) < 0)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(pkt->data, cdxl->header, CDXL_HEADER_SIZE);
|
|
ret = avio_read(pb, pkt->data + CDXL_HEADER_SIZE, video_size);
|
|
if (ret < 0) {
|
|
av_packet_unref(pkt);
|
|
return ret;
|
|
}
|
|
av_shrink_packet(pkt, CDXL_HEADER_SIZE + ret);
|
|
pkt->stream_index = cdxl->video_stream_index;
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
pkt->pos = pos;
|
|
pkt->duration = cdxl->framerate ? 1 : audio_size ? audio_size : 220;
|
|
cdxl->read_chunk = audio_size;
|
|
}
|
|
|
|
if (!cdxl->read_chunk)
|
|
avio_skip(pb, current_size - audio_size - video_size - CDXL_HEADER_SIZE);
|
|
return ret;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(CDXLDemuxContext, x)
|
|
static const AVOption cdxl_options[] = {
|
|
{ "sample_rate", "", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 11025 }, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
|
|
{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass cdxl_demuxer_class = {
|
|
.class_name = "CDXL demuxer",
|
|
.item_name = av_default_item_name,
|
|
.option = cdxl_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVInputFormat ff_cdxl_demuxer = {
|
|
.name = "cdxl",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video"),
|
|
.priv_data_size = sizeof(CDXLDemuxContext),
|
|
.read_probe = cdxl_read_probe,
|
|
.read_header = cdxl_read_header,
|
|
.read_packet = cdxl_read_packet,
|
|
.extensions = "cdxl,xl",
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
.priv_class = &cdxl_demuxer_class,
|
|
};
|