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lavfi/ebur128: print peak metering in dBFS 

Signed-off-by: Jean First <jeanfirst@gmail.com>
This commit is contained in:
Jean First 2014-01-25 23:19:06 +01:00 committed by Clément Bœsch
parent 7f42bfad5d
commit 6ef2315aaf
2 changed files with 30 additions and 12 deletions
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7
doc/filters.texi
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@ -9334,13 +9334,14 @@ Disable any peak mode (default).
@item sample
Enable sample-peak mode.
Simple peak mode looking for the higher sample value.
Simple peak mode looking for the higher sample value. It logs a message
for sample-peak (identified by @code{SPK}).
@item true
Enable true-peak mode.
If enabled, the peak lookup is done on an over-sampled version of the input
stream for better peak accuracy. This mode requires a build with
@code{libswresample}.
stream for better peak accuracy. It logs a message for true-peak.
(identified by @code{TPK}). This mode requires a build with @code{libswresample}.
@end table
@end table

35
libavfilter/f_ebur128.c
View File

@ -23,7 +23,6 @@
* EBU R.128 implementation
* @see http://tech.ebu.ch/loudness
* @see https://www.youtube.com/watch?v=iuEtQqC-Sqo "EBU R128 Introduction - Florian Camerer"
* @todo True Peak
* @todo implement start/stop/reset through filter command injection
* @todo support other frequencies to avoid resampling
*/
@ -443,6 +442,7 @@ static int config_audio_output(AVFilterLink *outlink)
#define ENERGY(loudness) (pow(10, ((loudness) + 0.691) / 10.))
#define LOUDNESS(energy) (-0.691 + 10 * log10(energy))
#define DBFS(energy) (20 * log10(energy))
static struct hist_entry *get_histogram(void)
{
@ -791,13 +791,13 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
loudness_400, loudness_3000,
ebur128->integrated_loudness, ebur128->loudness_range);
#define PRINT_PEAKS(str, sp, ptype) do { \
if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \
av_log(ctx, ebur128->loglevel, " [" str ":"); \
for (ch = 0; ch < nb_channels; ch++) \
av_log(ctx, ebur128->loglevel, " %.5f", sp[ch]); \
av_log(ctx, ebur128->loglevel, "]"); \
} \
#define PRINT_PEAKS(str, sp, ptype) do { \
if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \
av_log(ctx, ebur128->loglevel, " " str ":"); \
for (ch = 0; ch < nb_channels; ch++) \
av_log(ctx, ebur128->loglevel, " %5.1f", DBFS(sp[ch])); \
av_log(ctx, ebur128->loglevel, " dBFS"); \
} \
} while (0)
PRINT_PEAKS("SPK", ebur128->sample_peaks, SAMPLES);
@ -867,11 +867,28 @@ static av_cold void uninit(AVFilterContext *ctx)
" LRA: %5.1f LU\n"
" Threshold: %5.1f LUFS\n"
" LRA low: %5.1f LUFS\n"
" LRA high: %5.1f LUFS\n",
" LRA high: %5.1f LUFS",
ebur128->integrated_loudness, ebur128->i400.rel_threshold,
ebur128->loudness_range, ebur128->i3000.rel_threshold,
ebur128->lra_low, ebur128->lra_high);
#define PRINT_PEAK_SUMMARY(str, sp, ptype) do { \
int ch; \
double maxpeak; \
maxpeak = 0.0; \
if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \
for (ch = 0; ch < ebur128->nb_channels; ch++) \
maxpeak = FFMAX(maxpeak, sp[ch]); \
av_log(ctx, AV_LOG_INFO, "\n\n " str " peak:\n" \
" Peak: %5.1f dBFS", \
DBFS(maxpeak)); \
} \
} while (0)
PRINT_PEAK_SUMMARY("Sample", ebur128->sample_peaks, SAMPLES);
PRINT_PEAK_SUMMARY("True", ebur128->true_peaks, TRUE);
av_log(ctx, AV_LOG_INFO, "\n");
av_freep(&ebur128->y_line_ref);
av_freep(&ebur128->ch_weighting);
av_freep(&ebur128->true_peaks);