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.

1 files changed, 0 insertions, 153 deletions

diff --git a/stream/ai_oss.c b/stream/ai_oss.c
deleted file mode 100644
index bc22691be5..0000000000
--- a/stream/ai_oss.c
+++ /dev/null
@@ -1,153 +0,0 @@
-/*
- * 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 <stdio.h>
-#include <stdlib.h>
-
-#include "config.h"
-
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <sys/ioctl.h>
-
-#include <sys/soundcard.h>
-
-#include "osdep/io.h"
-
-#include "audio_in.h"
-#include "common/common.h"
-#include "common/msg.h"
-
-int ai_oss_set_samplerate(audio_in_t *ai)
-{
-    int tmp = ai->req_samplerate;
-    if (ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &tmp) == -1) return -1;
-    ai->samplerate = tmp;
-    return 0;
-}
-
-int ai_oss_set_channels(audio_in_t *ai)
-{
-    int err;
-    int ioctl_param;
-
-    if (ai->req_channels > 2)
-    {
-        ioctl_param = ai->req_channels;
-        MP_VERBOSE(ai, "ioctl dsp channels: %d\n",
-               err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_CHANNELS, &ioctl_param));
-        if (err < 0) {
-            MP_ERR(ai, "Unable to set channel count: %d\n",
-                   ai->req_channels);
-            return -1;
-        }
-        ai->channels = ioctl_param;
-    }
-    else
-    {
-        ioctl_param = (ai->req_channels == 2);
-        MP_VERBOSE(ai, "ioctl dsp stereo: %d (req: %d)\n",
-               err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_STEREO, &ioctl_param),
-               ioctl_param);
-        if (err < 0) {
-            MP_ERR(ai, "Unable to set stereo: %d\n",
-                   ai->req_channels == 2);
-            return -1;
-        }
-        ai->channels = ioctl_param ? 2 : 1;
-    }
-    return 0;
-}
-
-int ai_oss_init(audio_in_t *ai)
-{
-    int err;
-    int ioctl_param;
-
-    const char *device = ai->oss.device;
-    if (!device)
-        device = "/dev/dsp";
-
-    ai->oss.audio_fd = open(device, O_RDONLY | O_CLOEXEC);
-    if (ai->oss.audio_fd < 0)
-    {
-        MP_ERR(ai, "Unable to open '%s': %s\n", device, mp_strerror(errno));
-        return -1;
-    }
-
-    ioctl_param = 0 ;
-    MP_VERBOSE(ai, "ioctl dsp getfmt: %d\n",
-           ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETFMTS, &ioctl_param));
-
-    MP_VERBOSE(ai, "Supported formats: %x\n", ioctl_param);
-    if (!(ioctl_param & AFMT_S16_NE))
-        MP_ERR(ai, "unsupported format\n");
-
-    ioctl_param = AFMT_S16_NE;
-    MP_VERBOSE(ai, "ioctl dsp setfmt: %d\n",
-           err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETFMT, &ioctl_param));
-    if (err < 0) {
-        MP_ERR(ai, "Unable to set audio format.");
-        return -1;
-    }
-
-    if (ai_oss_set_channels(ai) < 0) return -1;
-
-    ioctl_param = ai->req_samplerate;
-    MP_VERBOSE(ai, "ioctl dsp speed: %d\n",
-           err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &ioctl_param));
-    if (err < 0) {
-        MP_ERR(ai, "Unable to set samplerate: %d\n",
-               ai->req_samplerate);
-        return -1;
-    }
-    ai->samplerate = ioctl_param;
-
-    MP_VERBOSE(ai, "ioctl dsp trigger: %d\n",
-           ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETTRIGGER, &ioctl_param));
-    MP_VERBOSE(ai, "trigger: %x\n", ioctl_param);
-    ioctl_param = PCM_ENABLE_INPUT;
-    MP_VERBOSE(ai, "ioctl dsp trigger: %d\n",
-           err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETTRIGGER, &ioctl_param));
-    if (err < 0) {
-        MP_ERR(ai, "Unable to set trigger: %d\n",
-               PCM_ENABLE_INPUT);
-    }
-
-    ai->blocksize = 0;
-    MP_VERBOSE(ai, "ioctl dsp getblocksize: %d\n",
-           err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETBLKSIZE, &ai->blocksize));
-    if (err < 0) {
-        MP_ERR(ai, "Unable to get block size!\n");
-    }
-    MP_VERBOSE(ai, "blocksize: %d\n", ai->blocksize);
-
-    // correct the blocksize to a reasonable value
-    if (ai->blocksize <= 0) {
-        ai->blocksize = 4096*ai->channels*2;
-        MP_ERR(ai, "Audio block size is zero, setting to %d!\n", ai->blocksize);
-    } else if (ai->blocksize < 4096*ai->channels*2) {
-        ai->blocksize *= 4096*ai->channels*2/ai->blocksize;
-        MP_ERR(ai, "Audio block size too low, setting to %d!\n", ai->blocksize);
-    }
-
-    ai->samplesize = 16;
-    ai->bytes_per_sample = 2;
-
-    return 0;
-}