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avformat/bintext: Implement bin_probe() 

Fixes misdetection of sbQ9.bin

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-01-31 15:22:29 +01:00
parent 698d5eb5bf
commit 8f6a71f7f1
1 changed files with 48 additions and 1 deletions
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49
libavformat/bintext.c
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@ -126,6 +126,53 @@ static void predict_width(AVCodecParameters *par, uint64_t fsize, int got_width)
par->width = fsize > 4000 ? (160<<3) : (80<<3);
}
static int bin_probe(AVProbeData *p)
{
const uint8_t *d = p->buf;
int magic = 0, sauce = 0;
int invisible = 0;
int i;
if (p->buf_size > 256)
magic = !memcmp(d + p->buf_size - 256, next_magic, sizeof(next_magic));
if (p->buf_size > 128)
sauce = !memcmp(d + p->buf_size - 128, "SAUCE00", 7);
if (magic)
return AVPROBE_SCORE_EXTENSION + 1;
if (av_match_ext(p->filename, "bin")) {
AVCodecParameters par;
int got_width = 0;
par.width = par.height = 0;
if (sauce)
return AVPROBE_SCORE_EXTENSION + 1;
predict_width(&par, p->buf_size, got_width);
if (par.width <= 0)
return 0;
calculate_height(&par, p->buf_size);
if (par.height <= 0)
return 0;
for (i = 0; i < p->buf_size - 256; i+=2) {
if ((d[i+1] & 15) == (d[i+1] >> 4) && d[i] && d[i] != 0xFF && d[i] != ' ') {
invisible ++;
}
}
if (par.width * par.height * 2 / (8*16) == p->buf_size)
return AVPROBE_SCORE_MAX / 2;
return 1;
}
if (sauce)
return 1;
return 0;
}
static int bintext_read_header(AVFormatContext *s)
{
BinDemuxContext *bin = s->priv_data;
@ -343,9 +390,9 @@ AVInputFormat ff_bintext_demuxer = {
.name = "bin",
.long_name = NULL_IF_CONFIG_SMALL("Binary text"),
.priv_data_size = sizeof(BinDemuxContext),
.read_probe = bin_probe,
.read_header = bintext_read_header,
.read_packet = read_packet,
.extensions = "bin",
.priv_class = CLASS("Binary text demuxer"),
};
#endif