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, 0 insertions, 272 deletions

diff --git a/demux/demux.c b/demux/demux.c
index b1f7ca0105..afb5fea2dd 100644
--- a/demux/demux.c
+++ b/demux/demux.c
@@ -52,7 +52,6 @@ extern const struct demuxer_desc demuxer_desc_edl;
 extern const struct demuxer_desc demuxer_desc_cue;
 extern const demuxer_desc_t demuxer_desc_rawaudio;
 extern const demuxer_desc_t demuxer_desc_rawvideo;
-extern const demuxer_desc_t demuxer_desc_tv;
 extern const demuxer_desc_t demuxer_desc_mf;
 extern const demuxer_desc_t demuxer_desc_matroska;
 extern const demuxer_desc_t demuxer_desc_lavf;
@@ -71,9 +70,6 @@ const demuxer_desc_t *const demuxer_list[] = {
     &demuxer_desc_cue,
     &demuxer_desc_rawaudio,
     &demuxer_desc_rawvideo,
-#if HAVE_TV
-    &demuxer_desc_tv,
-#endif
     &demuxer_desc_matroska,
 #if HAVE_LIBARCHIVE
     &demuxer_desc_libarchive,
diff --git a/demux/demux.h b/demux/demux.h
index 2bb81526ab..838314bd4b 100644
--- a/demux/demux.h
+++ b/demux/demux.h
@@ -202,7 +202,6 @@ typedef struct demuxer {
     bool fully_read;
     bool is_network; // opened directly from a network stream
     bool access_references; // allow opening other files/URLs
-    bool extended_ctrls; // supports some of BD/DVD/DVB/TV controls
 
     // Bitmask of DEMUX_EVENT_*
     int events;
diff --git a/demux/demux_tv.c b/demux/demux_tv.c
deleted file mode 100644
index 79cff5d79d..0000000000
--- a/demux/demux_tv.c
+++ /dev/null
@@ -1,267 +0,0 @@
-/*
- * Copyright (C) 2001 Alex Beregszaszi
- *
- * Feb 19, 2002: Significant rewrites by Charles R. Henrich (henrich@msu.edu)
- *               to add support for audio, and bktr *BSD support.
- *
- * This file is part of mpv.
- *
- * mpv is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * mpv is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <assert.h>
-
-#include "common/common.h"
-#include "common/msg.h"
-
-#include "options/m_option.h"
-#include "options/m_config.h"
-#include "options/options.h"
-
-#include "demux.h"
-#include "codec_tags.h"
-
-#include "audio/format.h"
-#include "osdep/endian.h"
-
-#include "stream/stream.h"
-#include "stream/tv.h"
-
-static int demux_open_tv(demuxer_t *demuxer, enum demux_check check)
-{
-    tvi_handle_t *tvh;
-    const tvi_functions_t *funcs;
-
-    if (check > DEMUX_CHECK_REQUEST)
-        return -1;
-
-    if (!demuxer->stream->info || strcmp(demuxer->stream->info->name, "tv") != 0)
-        return -1;
-
-    tv_param_t *params = mp_get_config_group(demuxer, demuxer->global,
-                                             &tv_params_conf);
-    bstr urlparams = bstr0(demuxer->stream->path);
-    bstr channel, input;
-    bstr_split_tok(urlparams, "/", &channel, &input);
-    if (channel.len) {
-        talloc_free(params->channel);
-        params->channel = bstrto0(NULL, channel);
-    }
-    if (input.len) {
-        bstr r;
-        params->input = bstrtoll(input, &r, 0);
-        if (r.len) {
-            MP_ERR(demuxer->stream, "invalid input: '%.*s'\n", BSTR_P(input));
-            return -1;
-        }
-    }
-
-    assert(demuxer->priv==NULL);
-    if(!(tvh=tv_begin(params, demuxer->log))) return -1;
-    if (!tvh->functions->init(tvh->priv)) return -1;
-
-    tvh->demuxer = demuxer;
-
-    if (!open_tv(tvh)){
-        tv_uninit(tvh);
-        return -1;
-    }
-    funcs = tvh->functions;
-    demuxer->priv=tvh;
-
-    struct sh_stream *sh_v = demux_alloc_sh_stream(STREAM_VIDEO);
-
-    /* get IMAGE FORMAT */
-    int fourcc;
-    funcs->control(tvh->priv, TVI_CONTROL_VID_GET_FORMAT, &fourcc);
-    if (fourcc == MP_FOURCC_MJPEG || fourcc == MP_FOURCC_JPEG) {
-        sh_v->codec->codec = "mjpeg";
-    } else {
-        sh_v->codec->codec = "rawvideo";
-        sh_v->codec->codec_tag = fourcc;
-    }
-
-    /* set FPS and FRAMETIME */
-
-    if(!sh_v->codec->fps)
-    {
-        float tmp;
-        if (funcs->control(tvh->priv, TVI_CONTROL_VID_GET_FPS, &tmp) != TVI_CONTROL_TRUE)
-             sh_v->codec->fps = 25.0f; /* on PAL */
-        else sh_v->codec->fps = tmp;
-    }
-
-    if (tvh->tv_param->fps != -1.0f)
-        sh_v->codec->fps = tvh->tv_param->fps;
-
-    /* If playback only mode, go to immediate mode, fail silently */
-    if(tvh->tv_param->immediate == 1)
-        {
-        funcs->control(tvh->priv, TVI_CONTROL_IMMEDIATE, 0);
-        tvh->tv_param->audio = 0;
-        }
-
-    /* set width */
-    funcs->control(tvh->priv, TVI_CONTROL_VID_GET_WIDTH, &sh_v->codec->disp_w);
-
-    /* set height */
-    funcs->control(tvh->priv, TVI_CONTROL_VID_GET_HEIGHT, &sh_v->codec->disp_h);
-
-    demux_add_sh_stream(demuxer, sh_v);
-
-    demuxer->seekable = 0;
-
-    /* here comes audio init */
-    if (tvh->tv_param->audio && funcs->control(tvh->priv, TVI_CONTROL_IS_AUDIO, 0) == TVI_CONTROL_TRUE)
-    {
-        int audio_format;
-
-        /* yeah, audio is present */
-
-        funcs->control(tvh->priv, TVI_CONTROL_AUD_SET_SAMPLERATE,
-                                  &tvh->tv_param->audiorate);
-
-        if (funcs->control(tvh->priv, TVI_CONTROL_AUD_GET_FORMAT, &audio_format) != TVI_CONTROL_TRUE)
-            goto no_audio;
-
-        switch(audio_format)
-        {
-            // This is the only format any of the current inputs generate.
-            case AF_FORMAT_S16:
-                break;
-            default:
-                MP_ERR(tvh, "Audio type '%s' unsupported!\n",
-                    af_fmt_to_str(audio_format));
-                goto no_audio;
-        }
-
-        struct sh_stream *sh_a = demux_alloc_sh_stream(STREAM_AUDIO);
-
-        funcs->control(tvh->priv, TVI_CONTROL_AUD_GET_SAMPLERATE,
-                   &sh_a->codec->samplerate);
-        int nchannels = sh_a->codec->channels.num;
-        funcs->control(tvh->priv, TVI_CONTROL_AUD_GET_CHANNELS,
-                   &nchannels);
-        mp_chmap_from_channels(&sh_a->codec->channels, nchannels);
-
-        // s16ne
-        mp_set_pcm_codec(sh_a->codec, true, false, 16, BYTE_ORDER == BIG_ENDIAN);
-
-        demux_add_sh_stream(demuxer, sh_a);
-
-        MP_VERBOSE(tvh, "  TV audio: %d channels, %d bits, %d Hz\n",
-                   nchannels, 16, sh_a->codec->samplerate);
-    }
-no_audio:
-
-    if(!(funcs->start(tvh->priv))){
-        // start failed :(
-        tv_uninit(tvh);
-        return -1;
-    }
-
-    /* set color eq */
-    tv_set_color_options(tvh, TV_COLOR_BRIGHTNESS, tvh->tv_param->brightness);
-    tv_set_color_options(tvh, TV_COLOR_HUE, tvh->tv_param->hue);
-    tv_set_color_options(tvh, TV_COLOR_SATURATION, tvh->tv_param->saturation);
-    tv_set_color_options(tvh, TV_COLOR_CONTRAST, tvh->tv_param->contrast);
-
-    if(tvh->tv_param->gain!=-1)
-        if(funcs->control(tvh->priv,TVI_CONTROL_VID_SET_GAIN,&tvh->tv_param->gain)!=TVI_CONTROL_TRUE)
-            MP_WARN(tvh, "Unable to set gain control!\n");
-
-    demuxer->extended_ctrls = true;
-
-    return 0;
-}
-
-static void demux_close_tv(demuxer_t *demuxer)
-{
-    tvi_handle_t *tvh=(tvi_handle_t*)(demuxer->priv);
-    if (!tvh) return;
-    tv_uninit(tvh);
-    free(tvh);
-    demuxer->priv=NULL;
-}
-
-static int demux_tv_fill_buffer(demuxer_t *demux)
-{
-    tvi_handle_t *tvh=(tvi_handle_t*)(demux->priv);
-    demux_packet_t* dp;
-    unsigned int len=0;
-    struct sh_stream *want_audio = NULL, *want_video = NULL;
-
-    int num_streams = demux_get_num_stream(demux);
-    for (int n = 0; n < num_streams; n++) {
-        struct sh_stream *sh = demux_get_stream(demux, n);
-        if (!demux_has_packet(sh) && demux_stream_is_selected(sh)) {
-            if (sh->type == STREAM_AUDIO)
-                want_audio = sh;
-            if (sh->type == STREAM_VIDEO)
-                want_video = sh;
-        }
-    }
-
-    /* ================== ADD AUDIO PACKET =================== */
-
-    if (want_audio && tvh->tv_param->audio &&
-        tvh->functions->control(tvh->priv,
-                                TVI_CONTROL_IS_AUDIO, 0) == TVI_CONTROL_TRUE)
-    {
-        len = tvh->functions->get_audio_framesize(tvh->priv);
-
-        dp=new_demux_packet(len);
-        if (dp) {
-            dp->keyframe = true;
-            dp->pts=tvh->functions->grab_audio_frame(tvh->priv, dp->buffer,len);
-            demux_add_packet(want_audio, dp);
-        }
-    }
-
-    /* ================== ADD VIDEO PACKET =================== */
-
-    if (want_video && tvh->functions->control(tvh->priv,
-                            TVI_CONTROL_IS_VIDEO, 0) == TVI_CONTROL_TRUE)
-    {
-        len = tvh->functions->get_video_framesize(tvh->priv);
-        dp=new_demux_packet(len);
-        if (dp) {
-            dp->keyframe = true;
-            dp->pts=tvh->functions->grab_video_frame(tvh->priv, dp->buffer, len);
-            demux_add_packet(want_video, dp);
-        }
-    }
-
-    if (tvh->tv_param->scan) tv_scan(tvh);
-    return 1;
-}
-
-static int demux_tv_control(demuxer_t *demuxer, int cmd, void *arg)
-{
-    tvi_handle_t *tvh=(tvi_handle_t*)(demuxer->priv);
-    if (cmd != DEMUXER_CTRL_STREAM_CTRL)
-        return CONTROL_UNKNOWN;
-    struct demux_ctrl_stream_ctrl *ctrl = arg;
-    ctrl->res = tv_stream_control(tvh, ctrl->ctrl, ctrl->arg);
-    return CONTROL_OK;
-}
-
-const demuxer_desc_t demuxer_desc_tv = {
-    .name = "tv",
-    .desc = "TV card demuxer",
-    .fill_buffer = demux_tv_fill_buffer,
-    .control = demux_tv_control,
-    .open = demux_open_tv,
-    .close = demux_close_tv,
-};