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avfilter/vf_psnr: Add max value output option to psnr stats log.

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This allows retroactive calculation/aggregation of PSNR from the stats
log.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Lucas Cooper 2016-08-31 12:40:41 -07:00 committed by Michael Niedermayer
parent 2b1d316ff6
commit aabe12eba3
2 changed files with 30 additions and 0 deletions
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10
doc/filters.texi
View File

@ -10832,6 +10832,12 @@ standard output.
Specifies which version of the stats file format to use. Details of
each format are written below.
Default value is 1.
@item stats_add_max
Determines whether the max value is output to the stats log.
Default value is 0.
Requires stats_version >= 2. If this is set and stats_version < 2,
the filter will return an error.
@end table
The file printed if @var{stats_file} is selected, contains a sequence of
@ -10868,6 +10874,10 @@ frames for the component specified by the suffix.
@item psnr_y, psnr_u, psnr_v, psnr_r, psnr_g, psnr_b, psnr_a
Peak Signal to Noise ratio of the compared frames for the component
specified by the suffix.
@item max_avg, max_y, max_u, max_v
Maximum allowed value for each channel, and average over all
channels.
@end table
For example:

20
libavfilter/vf_psnr.c
View File

@ -45,6 +45,7 @@ typedef struct PSNRContext {
char *stats_file_str;
int stats_version;
int stats_header_written;
int stats_add_max;
int max[4], average_max;
int is_rgb;
uint8_t rgba_map[4];
@ -63,6 +64,7 @@ static const AVOption psnr_options[] = {
{"stats_file", "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{"f", "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{"stats_version", "Set the format version for the stats file.", OFFSET(stats_version), AV_OPT_TYPE_INT, {.i64=1}, 1, 2, FLAGS },
{"output_max", "Add raw stats (max values) to the output log.", OFFSET(stats_add_max), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{ NULL }
};
@ -182,6 +184,12 @@ static AVFrame *do_psnr(AVFilterContext *ctx, AVFrame *main,
for (j = 0; j < s->nb_components; j++) {
fprintf(s->stats_file, ",psnr_%c", s->comps[j]);
}
if (s->stats_add_max) {
fprintf(s->stats_file, ",max_avg");
for (j = 0; j < s->nb_components; j++) {
fprintf(s->stats_file, ",max_%c", s->comps[j]);
}
}
fprintf(s->stats_file, "\n");
s->stats_header_written = 1;
}
@ -196,6 +204,13 @@ static AVFrame *do_psnr(AVFilterContext *ctx, AVFrame *main,
fprintf(s->stats_file, "psnr_%c:%0.2f ", s->comps[j],
get_psnr(comp_mse[c], 1, s->max[c]));
}
if (s->stats_version == 2 && s->stats_add_max) {
fprintf(s->stats_file, "max_avg:%d ", s->average_max);
for (j = 0; j < s->nb_components; j++) {
c = s->is_rgb ? s->rgba_map[j] : j;
fprintf(s->stats_file, "max_%c:%d ", s->comps[j], s->max[c]);
}
}
fprintf(s->stats_file, "\n");
}
@ -210,6 +225,11 @@ static av_cold int init(AVFilterContext *ctx)
s->max_mse = -INFINITY;
if (s->stats_file_str) {
if (s->stats_version < 2 && s->stats_add_max) {
av_log(ctx, AV_LOG_ERROR,
"stats_add_max was specified but stats_version < 2.\n" );
return AVERROR(EINVAL);
}
if (!strcmp(s->stats_file_str, "-")) {
s->stats_file = stdout;
} else {