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avformat: add format_probesize to allow tuning the maximum amount of bytes to identify the filetype

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Currently probesize is cliped at 1mb before being used for format detection.
Alternatively this cliping could be removed but this would then tie various
things like stream analysis to the file detection.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2014-01-27 23:09:38 +01:00
parent b0d0e29ffb
commit c37d179295
3 changed files with 11 additions and 4 deletions
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6
libavformat/utils.c
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@@ -379,8 +379,6 @@ int av_probe_input_buffer2(AVIOContext *pb, AVInputFormat **fmt,
if (!max_probe_size)
max_probe_size = PROBE_BUF_MAX;
else if (max_probe_size > PROBE_BUF_MAX)
max_probe_size = PROBE_BUF_MAX;
else if (max_probe_size < PROBE_BUF_MIN) {
av_log(logctx, AV_LOG_ERROR,
"Specified probe size value %u cannot be < %u\n", max_probe_size, PROBE_BUF_MIN);
@@ -474,7 +472,7 @@ static int init_input(AVFormatContext *s, const char *filename,
s->flags |= AVFMT_FLAG_CUSTOM_IO;
if (!s->iformat)
return av_probe_input_buffer2(s->pb, &s->iformat, filename,
s, 0, s->probesize);
s, 0, s->format_probesize);
else if (s->iformat->flags & AVFMT_NOFILE)
av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
"will be ignored with AVFMT_NOFILE format.\n");
@@ -491,7 +489,7 @@ static int init_input(AVFormatContext *s, const char *filename,
if (s->iformat)
return 0;
return av_probe_input_buffer2(s->pb, &s->iformat, filename,
s, 0, s->probesize);
s, 0, s->format_probesize);
}
static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,