af_drc: remove

Remove low quality drc filter. Anyone whishing to have dynamic range compression should use the much more powerful acompressor ffmpeg filter: mpv --af=lavfi=[acompressor] INPUT Or with parameters: mpv --af=lavfi=[acompressor=threshold=-25dB:ratio=3:makeup=8dB] INPUT Refer to https://ffmpeg.org/ffmpeg-filters.html#acompressor for a full list of supported parameters. Signed-off-by: wm4 <wm4@nowhere>
mpv-player · Mar 25, 2017 · 222899f · 222899f
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diff --git a/DOCS/interface-changes.rst b/DOCS/interface-changes.rst
@@ -25,6 +25,7 @@ Interface changes
     - remove ppm, pgm, pgmyuv, tga choices from the --screenshot-format and
       --vo-image-format options
     - the "jpeg" choice in the option above now leads to a ".jpg" file extension
+    - --af=drc is gone (you can use e.g. lavfi/acompressor instead)
  --- mpv 0.24.0 ---
     - deprecate --hwdec-api and replace it with --opengl-hwdec-interop.
       The new option accepts both --hwdec values, as well as named backends.

diff --git a/DOCS/man/af.rst b/DOCS/man/af.rst
@@ -319,29 +319,6 @@ Available filters are:
         the mixing matrix at runtime, without reinitializing the entire filter
         chain.
 
-``drc[=method:target]``
-    Applies dynamic range compression. This maximizes the volume by compressing
-    the audio signal's dynamic range. (Formerly called ``volnorm``.)
-
-    ``<method>``
-        Sets the used method.
-
-        1
-            Use a single sample to smooth the variations via the standard
-            weighted mean over past samples (default).
-        2
-            Use several samples to smooth the variations via the standard
-            weighted mean over past samples.
-
-    ``<target>``
-        Sets the target amplitude as a fraction of the maximum for the sample
-        type (default: 0.25).
-
-    .. note::
-
-        This filter can cause distortion with audio signals that have a very
-        large dynamic range.
-
 ``scaletempo[=option1:option2:...]``
     Scales audio tempo without altering pitch, optionally synced to playback
     speed (default).

diff --git a/DOCS/mplayer-changes.rst b/DOCS/mplayer-changes.rst
@@ -212,7 +212,7 @@ Command Line Switches
     ``-no<opt>``                ``--no-<opt>`` (add a dash)
     ``-a52drc level``           ``--ad-lavc-ac3drc=level``
     ``-ac spdifac3``            ``--ad=spdif:ac3`` (see ``--ad=help``)
-    ``-af volnorm``             ``--af=drc`` (renamed)
+    ``-af volnorm``             (removed; use acompressor ffmpeg filter instead)
     ``-afm hwac3``              ``--ad=spdif:ac3,spdif:dts``
     ``-ao alsa:device=hw=0.3``  ``--ao=alsa:device=[hw:0,3]``
     ``-aspect``                 ``--video-aspect``

diff --git a/TOOLS/lua/drc-control.lua b/TOOLS/lua/drc-control.lua
diff --git a/audio/filter/af.c b/audio/filter/af.c
@@ -36,7 +36,6 @@ extern const struct af_info af_info_format;
 extern const struct af_info af_info_volume;
 extern const struct af_info af_info_equalizer;
 extern const struct af_info af_info_pan;
-extern const struct af_info af_info_drc;
 extern const struct af_info af_info_lavcac3enc;
 extern const struct af_info af_info_lavrresample;
 extern const struct af_info af_info_scaletempo;
@@ -50,7 +49,6 @@ static const struct af_info *const filter_list[] = {
     &af_info_volume,
     &af_info_equalizer,
     &af_info_pan,
-    &af_info_drc,
     &af_info_lavcac3enc,
     &af_info_lavrresample,
 #if HAVE_RUBBERBAND