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Reusing the probe buffer to rewind the ByteIOContext in ff_probe_input_buffer() instead of seeking back to the start of the file. Once exhausted, the size of the buffer is reduced.

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Originally committed as revision 22821 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Tomas Härdin
2010-04-08 09:02:27 +00:00
parent ba659bedb8
commit 01d91b9be9
3 changed files with 65 additions and 8 deletions
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13
libavformat/utils.c
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@@ -516,19 +516,16 @@ int ff_probe_input_buffer(ByteIOContext **pb, AVInputFormat **fmt,
}
}
av_free(buf);
if (!*fmt) {
av_free(buf);
return AVERROR_INVALIDDATA;
}
if (url_fseek(*pb, 0, SEEK_SET) < 0) {
url_fclose(*pb);
if (url_fopen(pb, filename, URL_RDONLY) < 0)
return AVERROR(EIO);
}
/* rewind. reuse probe buffer to avoid seeking */
if ((ret = ff_rewind_with_probe_data(*pb, buf, pd.buf_size)) < 0)
av_free(buf);
return 0;
return ret;
}
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,