X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Ff_ebur128.c;h=20c9426b6e3d02d91fbe87fa467815c368c39f27;hb=8deb1fdac84e58691d4ca940a7b815feee67bc3e;hp=cad1119ee5d204b638bedaa953864c9602516b87;hpb=78af3ffaa934477460522a18d41d29693b6e1d64;p=ffmpeg

diff --git a/libavfilter/f_ebur128.c b/libavfilter/f_ebur128.c
index cad1119ee5d..20c9426b6e3 100644
--- a/libavfilter/f_ebur128.c
+++ b/libavfilter/f_ebur128.c
@@ -139,6 +139,8 @@ typedef struct {
     /* misc */
     int loglevel;                   ///< log level for frame logging
     int metadata;                   ///< whether or not to inject loudness results in frames
+    int dual_mono;                  ///< whether or not to treat single channel input files as dual-mono
+    double pan_law;                 ///< pan law value used to calulate dual-mono measurements
 } EBUR128Context;
 
 enum {
@@ -152,7 +154,7 @@ enum {
 #define V AV_OPT_FLAG_VIDEO_PARAM
 #define F AV_OPT_FLAG_FILTERING_PARAM
 static const AVOption ebur128_options[] = {
-    { "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, V|F },
+    { "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, V|F },
     { "size",  "set video size",   OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, V|F },
     { "meter", "set scale meter (+9 to +18)",  OFFSET(meter), AV_OPT_TYPE_INT, {.i64 = 9}, 9, 18, V|F },
     { "framelog", "force frame logging level", OFFSET(loglevel), AV_OPT_TYPE_INT, {.i64 = -1},   INT_MIN, INT_MAX, A|V|F, "level" },
@@ -163,6 +165,8 @@ static const AVOption ebur128_options[] = {
         { "none",   "disable any peak mode",   0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_NONE},          INT_MIN, INT_MAX, A|F, "mode" },
         { "sample", "enable peak-sample mode", 0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_SAMPLES_PEAKS}, INT_MIN, INT_MAX, A|F, "mode" },
         { "true",   "enable true-peak mode",   0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_TRUE_PEAKS},    INT_MIN, INT_MAX, A|F, "mode" },
+    { "dualmono", "treat mono input files as dual-mono", OFFSET(dual_mono), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, A|F },
+    { "panlaw", "set a specific pan law for dual-mono files", OFFSET(pan_law), AV_OPT_TYPE_DOUBLE, {.dbl = -3.01029995663978}, -10.0, 0.0, A|F },
     { NULL },
 };
 
@@ -337,8 +341,6 @@ static int config_video_output(AVFilterLink *outlink)
     DRAW_RECT(ebur128->graph);
     DRAW_RECT(ebur128->gauge);
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-
     return 0;
 }
 
@@ -398,8 +400,6 @@ static int config_audio_output(AVFilterLink *outlink)
             return AVERROR(ENOMEM);
     }
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-
 #if CONFIG_SWRESAMPLE
     if (ebur128->peak_mode & PEAK_MODE_TRUE_PEAKS) {
         int ret;
@@ -665,6 +665,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
                 }
                 if (nb_integrated)
                     ebur128->integrated_loudness = LOUDNESS(integrated_sum / nb_integrated);
+                    /* dual-mono correction */
+                    if (nb_channels == 1 && ebur128->dual_mono) {
+                        ebur128->integrated_loudness -= ebur128->pan_law;
+                    }
             }
 
             /* LRA */
@@ -711,6 +715,12 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
                 }
             }
 
+            /* dual-mono correction */
+            if (nb_channels == 1 && ebur128->dual_mono) {
+                loudness_400 -= ebur128->pan_law;
+                loudness_3000 -= ebur128->pan_law;
+            }
+
 #define LOG_FMT "M:%6.1f S:%6.1f     I:%6.1f LUFS     LRA:%6.1f LU"
 
             /* push one video frame */
@@ -859,6 +869,14 @@ static av_cold void uninit(AVFilterContext *ctx)
     int i;
     EBUR128Context *ebur128 = ctx->priv;
 
+    /* dual-mono correction */
+    if (ebur128->nb_channels == 1 && ebur128->dual_mono) {
+        ebur128->i400.rel_threshold -= ebur128->pan_law;
+        ebur128->i3000.rel_threshold -= ebur128->pan_law;
+        ebur128->lra_low -= ebur128->pan_law;
+        ebur128->lra_high -= ebur128->pan_law;
+    }
+
     av_log(ctx, AV_LOG_INFO, "Summary:\n\n"
            "  Integrated loudness:\n"
            "    I:         %5.1f LUFS\n"