vd_lavc: rename --hwdec=rpi to --hwdec=mmal

Annoying exception that makes no sense to keep. Normally, users or
client applications will either use --hwdec=auto, or not set the option
at all, which both leads to the expected result.

DOCS/interface-changes.rst

@@ -59,6 +59,8 @@ Interface changes
       now.
     - change the --hwdec option from a choice to a plain string (affects
       introspection of the option/property), also affects some properties
+    - rename --hwdec=rpi to --hwdec=mmal, sane for the -copy variant (no
+      backwards compatibility)
  --- mpv 0.27.0 ---
     - drop previously deprecated --field-dominance option
     - drop previously deprecated "osd" command

DOCS/man/options.rst

@@ -698,8 +698,8 @@ Video
     :d3d11va-copy: copies video back to system RAM (Windows 8+ only)
     :mediacodec: requires ``--vo=mediacodec_embed`` (Android only)
     :mediacodec-copy: copies video back to system RAM (Android only)
-    :rpi:       requires ``--vo=gpu`` (Raspberry Pi only - default if available)
-    :rpi-copy:  copies video back to system RAM (Raspberry Pi only)
+    :mmal:      requires ``--vo=gpu`` (Raspberry Pi only - default if available)
+    :mmal-copy: copies video back to system RAM (Raspberry Pi only)
     :cuda:      requires ``--vo=gpu`` (Any platform CUDA is available)
     :cuda-copy: copies video back to system RAM (Any platform CUDA is available)
     :nvdec:     requires ``--vo=gpu`` (Any platform CUDA is available)

video/decode/vd_lavc.c

@@ -269,10 +269,6 @@ static void add_all_hwdec_methods(struct hwdec_info **infos, int *num_infos)
         if (codec->capabilities & (AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_HYBRID))
             wrapper = codec->wrapper_name;
 
-        // Different lavc/mpv names.
-        if (wrapper && strcmp(wrapper, "mmal") == 0)
-            wrapper = "rpi";
-
         // A decoder can provide multiple methods. In particular, hwaccels
         // provide various methods (e.g. native h264 with vaapi & d3d11), but
         // even wrapper decoders could provide multiple methods.