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>

1 files changed, 0 insertions, 99 deletions

diff --git a/TOOLS/lua/drc-control.lua b/TOOLS/lua/drc-control.lua
deleted file mode 100644
index 83cdb9c935..0000000000
--- a/TOOLS/lua/drc-control.lua
+++ /dev/null
@@ -1,99 +0,0 @@
--- This script enables live control of the dynamic range compression
--- (drc) audio filter while the video is playing back. This can be
--- useful to avoid having to stop and restart mpv to adjust filter
--- parameters. See the entry for "drc" under the "AUDIO FILTERS"
--- section of the man page for a complete description of the filter.
---
--- This script registers the key-binding "\" to toggle the filter between
---
--- * off
--- * method=1 (single-sample smoothing)
--- * method=2 (multi-sample smoothing)
---
--- It registers the keybindings ctrl+9/ctrl+0 to decrease/increase the
--- target ampltiude. These keys will insert the filter at the default
--- target amplitude of 0.25 if it was not previously present.
---
--- OSD feedback of the current filter state is displayed on pressing
--- each bound key.
-
-script_name = mp.get_script_name()
-
-function print_state(params)
-    if params then
-        mp.osd_message(script_name..":\n"
-                           .."method = "..params["method"].."\n"
-                           .."target = "..params["target"])
-    else
-        mp.osd_message(script_name..":\noff")
-    end
-end
-
-function get_index_of_drc(afs)
-    for i,af in pairs(afs) do
-        if af["label"] == script_name then
-            return i
-        end
-    end
-end
-
-function append_drc(afs)
-    afs[#afs+1] = {
-        name   = "drc",
-        label  = script_name,
-        params = {
-            method = "1",
-            target = "0.25"
-        }
-    }
-    print_state(afs[#afs]["params"])
-end
-
-function modify_or_create_af(fun)
-    afs = mp.get_property_native("af")
-    i = get_index_of_drc(afs)
-    if not i then
-        append_drc(afs)
-    else
-        fun(afs, i)
-    end
-    mp.set_property_native("af", afs)
-end
-
-function drc_toggle_method_handler()
-    modify_or_create_af(
-        function (afs, i)
-            new_method=(afs[i]["params"]["method"]+1)%3
-            if new_method == 0 then
-                table.remove(afs, i)
-                print_state(nil)
-            else
-                afs[i]["params"]["method"] = tostring((afs[i]["params"]["method"])%2+1)
-                print_state(afs[i]["params"])
-            end
-        end
-    )
-end
-
-function drc_scale_target(factor)
-    modify_or_create_af(
-        function (afs)
-            afs[i]["params"]["target"] = tostring(afs[i]["params"]["target"]*factor)
-            print_state(afs[i]["params"])
-        end
-    )
-end
-
-function drc_louder_handler()
-    drc_scale_target(2.0)
-end
-
-function drc_quieter_handler()
-    drc_scale_target(0.5)
-end
-
--- toggle between off, method 1 and method 2
-mp.add_key_binding("\\", "drc_toggle_method", drc_toggle_method_handler)
--- increase or decrease target volume
-mp.add_key_binding("ctrl+9", "drc_quieter", drc_quieter_handler)
-mp.add_key_binding("ctrl+0", "drc_louder", drc_louder_handler)