Remove classic Linux analog TV support, and DVB runtime controls

Linux analog TV support (via tv://) was excessively complex, and
whenever I attempted to use it (cameras or loopback devices), it didn't
work well, or would have required some major work to update it. It's
very much stuck in the analog past (my favorite are the frequency tables
in frequencies.c for analog TV channels which don't exist anymore).

Especially cameras and such work fine with libavdevice and better than
tv://, for example:

  mpv av://v4l2:/dev/video0

(adding --profile=low-latency --untimed even makes it mostly realtime)

Adding a new input layer that targets such "modern" uses would be
acceptable, if anyone is interested in it. The old TV code is just too
focused on actual analog TV.

DVB is rather obscure, but has an active maintainer, so don't remove it.
However, the demux/stream ctrl layer must go, so remove controls for
channel switching. Most of these could be reimplemented by using the
normal method for option runtime changes.

3 files changed, 3 insertions, 199 deletions

diff --git a/DOCS/interface-changes.rst b/DOCS/interface-changes.rst
index 8fccb23e29..c849a8f499 100644
--- a/DOCS/interface-changes.rst
+++ b/DOCS/interface-changes.rst
@@ -82,6 +82,8 @@ Interface changes
       with the move to libplacebo as the back-end for vulkan rendering.
     - Remove "disc-titles", "disc-title", "disc-title-list", and "angle"
       properties. dvd:// does not support title ranges anymore.
+    - Remove all "tv-..." options and properties, along with the classic Linux
+      analog TV support.
  --- mpv 0.29.0 ---
     - drop --opensles-sample-rate, as --audio-samplerate should be used if desired
     - drop deprecated --videotoolbox-format, --ff-aid, --ff-vid, --ff-sid,
diff --git a/DOCS/man/input.rst b/DOCS/man/input.rst
index 43fb868db1..5065a90283 100644
--- a/DOCS/man/input.rst
+++ b/DOCS/man/input.rst
@@ -921,8 +921,7 @@ Input Commands that are Possibly Subject to Change
         ``--glsl-shader=file.glsl``.
 
 
-Undocumented commands: ``tv-last-channel`` (TV/DVB only),
-``ao-reload`` (experimental/internal).
+Undocumented commands: ``ao-reload`` (experimental/internal).
 
 Hooks
 ~~~~~
@@ -1815,15 +1814,6 @@ Property list
 ``program`` (W)
     Switch TS program (write-only).
 
-``dvb-channel`` (W)
-    Pair of integers: card,channel of current DVB stream.
-    Can be switched to switch to another channel on the same card.
-
-``dvb-channel-name`` (RW)
-    Name of current DVB program.
-    On write, a channel-switch to the named channel on the same
-    card is performed. Can also be used for channel switching.
-
 ``sub-text``
     Return the current subtitle text. Formatting is stripped. If a subtitle
     is selected, but no text is currently visible, or the subtitle is not
@@ -1831,9 +1821,6 @@ Property list
 
     This property is experimental and might be removed in the future.
 
-``tv-brightness``, ``tv-contrast``, ``tv-saturation``, ``tv-hue`` (RW)
-    TV stuff.
-
 ``playlist-pos`` (RW)
     Current position on playlist. The first entry is on position 0. Writing
     to the property will restart playback at the written entry.
diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst
index b7ffda9a8c..657235c161 100644
--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@@ -3657,191 +3657,6 @@ Terminal
 ``--msg-time``
     Prepend timing information to each console message.
 
-
-TV
---
-
-``--tv-...``
-    These options tune various properties of the TV capture module. For
-    watching TV with mpv, use ``tv://`` or ``tv://<channel_number>`` or
-    even ``tv://<channel_name>`` (see option ``tv-channels`` for ``channel_name``
-    below) as a media URL. You can also use ``tv:///<input_id>`` to start
-    watching a video from a composite or S-Video input (see option ``input`` for
-    details).
-
-``--tv-device=<value>``
-    Specify TV device (default: ``/dev/video0``).
-
-``--tv-channel=<value>``
-    Set tuner to <value> channel.
-
-``--no-tv-audio``
-    no sound
-
-``--tv-automute=<0-255> (v4l and v4l2 only)``
-    If signal strength reported by device is less than this value, audio
-    and video will be muted. In most cases automute=100 will be enough.
-    Default is 0 (automute disabled).
-
-``--tv-driver=<value>``
-    See ``--tv=driver=help`` for a list of compiled-in TV input drivers.
-    available: dummy, v4l2 (default: autodetect)
-
-``--tv-input=<value>``
-    Specify input (default: 0 (TV), see console output for available
-    inputs).
-
-``--tv-freq=<value>``
-    Specify the frequency to set the tuner to (e.g. 511.250). Not
-    compatible with the channels parameter.
-
-``--tv-outfmt=<value>``
-    Specify the output format of the tuner with a preset value supported
-    by the V4L driver (YV12, UYVY, YUY2, I420) or an arbitrary format given
-    as hex value.
-
-``--tv-width=<value>``
-    output window width
-
-``--tv-height=<value>``
-    output window height
-
-``--tv-fps=<value>``
-    framerate at which to capture video (frames per second)
-
-``--tv-buffersize=<value>``
-    maximum size of the capture buffer in megabytes (default: dynamical)
-
-``--tv-norm=<value>``
-    See the console output for a list of all available norms.
-
-    See also: ``--tv-normid``.
-
-``--tv-normid=<value> (v4l2 only)``
-    Sets the TV norm to the given numeric ID. The TV norm depends on the
-    capture card. See the console output for a list of available TV norms.
-
-``--tv-chanlist=<value>``
-    available: argentina, australia, china-bcast, europe-east,
-    europe-west, france, ireland, italy, japan-bcast, japan-cable,
-    newzealand, russia, southafrica, us-bcast, us-cable, us-cable-hrc
-
-``--tv-channels=<chan>-<name>[=<norm>],<chan>-<name>[=<norm>],...``
-    Set names for channels.
-
-    .. note::
-
-        If <chan> is an integer greater than 1000, it will be treated as
-        frequency (in kHz) rather than channel name from frequency table.
-        Use _ for spaces in names (or play with quoting ;-) ). The channel
-        names will then be written using OSD, and the input commands
-        ``tv_step_channel``, ``tv_set_channel`` and ``tv_last_channel``
-        will be usable for a remote control. Not compatible with
-        the ``frequency`` parameter.
-
-    .. note::
-
-        The channel number will then be the position in the 'channels'
-        list, beginning with 1.
-
-    .. admonition:: Examples
-
-        ``tv://1``, ``tv://TV1``, ``tv_set_channel 1``,
-        ``tv_set_channel TV1``
-
-``--tv-[brightness|contrast|hue|saturation]=<-100-100>``
-    Set the image equalizer on the card.
-
-``--tv-audiorate=<value>``
-    Set input audio sample rate.
-
-``--tv-forceaudio``
-    Capture audio even if there are no audio sources reported by v4l.
-
-``--tv-alsa``
-    Capture from ALSA.
-
-``--tv-amode=<0-3>``
-    Choose an audio mode:
-
-    :0: mono
-    :1: stereo
-    :2: language 1
-    :3: language 2
-
-``--tv-forcechan=<1-2>``
-    By default, the count of recorded audio channels is determined
-    automatically by querying the audio mode from the TV card. This option
-    allows forcing stereo/mono recording regardless of the amode option
-    and the values returned by v4l. This can be used for troubleshooting
-    when the TV card is unable to report the current audio mode.
-
-``--tv-adevice=<value>``
-    Set an audio device. <value> should be ``/dev/xxx`` for OSS and a
-    hardware ID for ALSA. You must replace any ':' by a '.' in the
-    hardware ID for ALSA.
-
-``--tv-audioid=<value>``
-    Choose an audio output of the capture card, if it has more than one.
-
-``--tv-[volume|bass|treble|balance]=<0-100>``
-    These options set parameters of the mixer on the video capture card.
-    They will have no effect, if your card does not have one. For v4l2 50
-    maps to the default value of the control, as reported by the driver.
-
-``--tv-gain=<0-100>``
-    Set gain control for video devices (usually webcams) to the desired
-    value and switch off automatic control. A value of 0 enables automatic
-    control. If this option is omitted, gain control will not be modified.
-
-``--tv-immediatemode=<bool>``
-    A value of 0 means capture and buffer audio and video together. A
-    value of 1 (default) means to do video capture only and let the audio
-    go through a loopback cable from the TV card to the sound card.
-
-``--tv-mjpeg``
-    Use hardware MJPEG compression (if the card supports it). When using
-    this option, you do not need to specify the width and height of the
-    output window, because mpv will determine it automatically from
-    the decimation value (see below).
-
-``--tv-decimation=<1|2|4>``
-    choose the size of the picture that will be compressed by hardware
-    MJPEG compression:
-
-    :1: full size
-
-        - 704x576 PAL
-        - 704x480 NTSC
-
-    :2: medium size
-
-        - 352x288 PAL
-        - 352x240 NTSC
-
-    :4: small size
-
-        - 176x144 PAL
-        - 176x120 NTSC
-
-``--tv-quality=<0-100>``
-    Choose the quality of the JPEG compression (< 60 recommended for full
-    size).
-
-``--tv-scan-autostart``
-    Begin channel scanning immediately after startup (default: disabled).
-
-``--tv-scan-period=<0.1-2.0>``
-    Specify delay in seconds before switching to next channel (default:
-    0.5). Lower values will cause faster scanning, but can detect inactive
-    TV channels as active.
-
-``--tv-scan-threshold=<1-100>``
-    Threshold value for the signal strength (in percent), as reported by
-    the device (default: 50). A signal strength higher than this value will
-    indicate that the currently scanning channel is active.
-
-
 Cache
 -----