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Code Issues Releases Wiki Activity

remove unneeded probing code, ffmpeg does that already so no need to duplicate it

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Benjamin Drung <bdrung@debian.org>
This commit is contained in:
benjamin.drung@gmail.com 2014-05-23 20:32:14 +00:00
parent 60fe57463e
commit 6ac83ae299
1 changed files with 1 additions and 84 deletions
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85
src/FFmpeg.cpp
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@ -256,10 +256,6 @@ int ufile_fopen(AVIOContext **s, const wxString & name, int flags)
}
// Size of probe buffer, for guessing file type from file contents
#define PROBE_BUF_MIN 2048
#define PROBE_BUF_MAX (1<<20)
// Detect type of input file and open it if recognized. Routine
// based on the av_open_input_file() libavformat function.
int ufile_fopen_input(AVFormatContext **ic_ptr, wxString & name)
@ -267,108 +263,29 @@ int ufile_fopen_input(AVFormatContext **ic_ptr, wxString & name)
wxFileName f(name);
wxCharBuffer fname;
const char *filename;
AVProbeData pd;
AVIOContext *pb = NULL;
AVInputFormat *fmt = NULL;
AVInputFormat *fmt1;
int probe_size;
int err;
fname = f.GetFullName().mb_str();
filename = (const char *) fname;
// Initialize probe data...go ahead and preallocate the maximum buffer size.
pd.filename = filename;
pd.buf_size = 0;
pd.buf = (unsigned char *) av_malloc(PROBE_BUF_MAX + AVPROBE_PADDING_SIZE);
if (pd.buf == NULL) {
err = AVERROR(ENOMEM);
goto fail;
}
// Open the file to prepare for probing
if ((err = ufile_fopen(&pb, name, AVIO_FLAG_READ)) < 0) {
goto fail;
}
for (probe_size = PROBE_BUF_MIN; probe_size <= PROBE_BUF_MAX && !fmt; probe_size <<= 1) {
int score_max = probe_size < PROBE_BUF_MAX ? AVPROBE_SCORE_MAX / 4 : 0;
// Read up to a "probe_size" worth of data
pd.buf_size = avio_read(pb, pd.buf, probe_size);
// AWD: with zero-length input files buf_size can come back negative;
// this causes problems so we might as well just fail
if (pd.buf_size < 0) {
err = AVERROR_INVALIDDATA;
goto fail;
}
// Clear up to a "AVPROBE_PADDING_SIZE" worth of unused buffer
memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
// Reposition file for succeeding scan
if (avio_seek(pb, 0, SEEK_SET) < 0) {
err = AVERROR(EIO);
goto fail;
}
// Scan all input formats
fmt = NULL;
for (fmt1 = av_iformat_next(NULL); fmt1 != NULL; fmt1 = av_iformat_next(fmt1)) {
int score = 0;
// Ignore the ones that are not file based
if (fmt1->flags & AVFMT_NOFILE) {
continue;
}
// If the format can probe the file then try that first
if (fmt1->read_probe) {
score = fmt1->read_probe(&pd);
}
// Otherwize, resort to extension matching if available
else if (fmt1->extensions) {
if (av_match_ext(filename, fmt1->extensions)) {
score = 50;
}
}
// Remember this format if it scored higher than a previous match
if (score > score_max) {
score_max = score;
fmt = fmt1;
}
else if (score == score_max) {
fmt = NULL;
}
}
}
// Didn't find a suitable format, so bail
if (!fmt) {
err = AVERROR(EILSEQ);
goto fail;
}
*ic_ptr = avformat_alloc_context();
(*ic_ptr)->pb = pb;
// And finally, attempt to associate an input stream with the file
err = avformat_open_input(ic_ptr, filename, fmt, NULL);
err = avformat_open_input(ic_ptr, filename, NULL, NULL);
if (err) {
goto fail;
}
// Done with the probe buffer
av_freep(&pd.buf);
return 0;
fail:
if (pd.buf) {
av_freep(&pd.buf);
}
if (pb) {
ufile_close(pb);