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vpxenc: add deterministic output option

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By baking the version number into the output file, a hash of the file
will vary from commit to commit, even if the output is otherwise bit
exact. Add a -D option to suppress this behavior, for use when
bisecting or other debugging.

Change-Id: I5089a8ce5719920ffaf47620fa9069b81fa15673
This commit is contained in:
John Koleszar 2010-10-26 16:22:22 -04:00
parent ad760b9660
commit 75afcee962
1 changed files with 11 additions and 2 deletions
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13
vpxenc.c
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@ -430,6 +430,8 @@ struct cue_entry
struct EbmlGlobal
{
int debug;
FILE *stream;
uint64_t last_pts_ms;
vpx_rational_t framerate;
@ -552,8 +554,10 @@ write_webm_seek_info(EbmlGlobal *ebml)
Ebml_SerializeUnsigned(ebml, TimecodeScale, 1000000);
Ebml_SerializeFloat(ebml, Segment_Duration,
ebml->last_pts_ms + frame_time);
Ebml_SerializeString(ebml, 0x4D80, "vpxenc" VERSION_STRING);
Ebml_SerializeString(ebml, 0x5741, "vpxenc" VERSION_STRING);
Ebml_SerializeString(ebml, 0x4D80,
ebml->debug ? "vpxenc" : "vpxenc" VERSION_STRING);
Ebml_SerializeString(ebml, 0x5741,
ebml->debug ? "vpxenc" : "vpxenc" VERSION_STRING);
Ebml_EndSubElement(ebml, &startInfo);
}
}
@ -740,6 +744,8 @@ write_webm_file_footer(EbmlGlobal *glob)
#include "args.h"
static const arg_def_t debugmode = ARG_DEF("D", "debug", 0,
"Debug mode (makes output deterministic)");
static const arg_def_t outputfile = ARG_DEF("o", "output", 1,
"Output filename");
static const arg_def_t use_yv12 = ARG_DEF(NULL, "yv12", 0,
@ -774,6 +780,7 @@ static const arg_def_t use_ivf = ARG_DEF(NULL, "ivf", 0,
"Output IVF (default is WebM)");
static const arg_def_t *main_args[] =
{
&debugmode,
&outputfile, &codecarg, &passes, &pass_arg, &fpf_name, &limit, &deadline,
&best_dl, &good_dl, &rt_dl,
&verbosearg, &psnrarg, &use_ivf, &framerate,
@ -1052,6 +1059,8 @@ int main(int argc, const char **argv_)
write_webm = 0;
else if (arg_match(&arg, &outputfile, argi))
out_fn = arg.val;
else if (arg_match(&arg, &debugmode, argi))
ebml.debug = 1;
else
argj++;
}