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, 199 deletions

diff --git a/stream/ai_alsa1x.c b/stream/ai_alsa1x.c
deleted file mode 100644
index 8f2b774faf..0000000000
--- a/stream/ai_alsa1x.c
+++ /dev/null
@@ -1,199 +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 <sys/time.h>
-
-#include "config.h"
-
-#include <alsa/asoundlib.h>
-#include "audio_in.h"
-#include "common/msg.h"
-
-int ai_alsa_setup(audio_in_t *ai)
-{
-    snd_pcm_hw_params_t *params;
-    snd_pcm_sw_params_t *swparams;
-    snd_pcm_uframes_t buffer_size, period_size;
-    int err;
-    int dir;
-    unsigned int rate;
-
-    snd_pcm_hw_params_alloca(&params);
-    snd_pcm_sw_params_alloca(&swparams);
-
-    err = snd_pcm_hw_params_any(ai->alsa.handle, params);
-    if (err < 0) {
-        MP_ERR(ai, "Broken configuration for this PCM: no configurations available.\n");
-        return -1;
-    }
-
-    err = snd_pcm_hw_params_set_access(ai->alsa.handle, params,
-                                       SND_PCM_ACCESS_RW_INTERLEAVED);
-    if (err < 0) {
-        MP_ERR(ai, "Access type not available.\n");
-        return -1;
-    }
-
-    err = snd_pcm_hw_params_set_format(ai->alsa.handle, params, SND_PCM_FORMAT_S16);
-    if (err < 0) {
-        MP_ERR(ai, "Sample format not available.\n");
-        return -1;
-    }
-
-    err = snd_pcm_hw_params_set_channels(ai->alsa.handle, params, ai->req_channels);
-    if (err < 0) {
-        snd_pcm_hw_params_get_channels(params, &ai->channels);
-        MP_ERR(ai, "Channel count not available - reverting to default: %d\n",
-               ai->channels);
-    } else {
-        ai->channels = ai->req_channels;
-    }
-
-    dir = 0;
-    rate = ai->req_samplerate;
-    err = snd_pcm_hw_params_set_rate_near(ai->alsa.handle, params, &rate, &dir);
-    if (err < 0) {
-        MP_ERR(ai, "Cannot set samplerate.\n");
-    }
-    ai->samplerate = rate;
-
-    dir = 0;
-    ai->alsa.buffer_time = 1000000;
-    err = snd_pcm_hw_params_set_buffer_time_near(ai->alsa.handle, params,
-                                                 &ai->alsa.buffer_time, &dir);
-    if (err < 0) {
-        MP_ERR(ai, "Cannot set buffer time.\n");
-    }
-
-    dir = 0;
-    ai->alsa.period_time = ai->alsa.buffer_time / 4;
-    err = snd_pcm_hw_params_set_period_time_near(ai->alsa.handle, params,
-                                                 &ai->alsa.period_time, &dir);
-    if (err < 0) {
-        MP_ERR(ai, "Cannot set period time.\n");
-    }
-
-    err = snd_pcm_hw_params(ai->alsa.handle, params);
-    if (err < 0) {
-        MP_ERR(ai, "Unable to install hardware parameters: %s", snd_strerror(err));
-        snd_pcm_hw_params_dump(params, ai->alsa.log);
-        return -1;
-    }
-
-    dir = -1;
-    snd_pcm_hw_params_get_period_size(params, &period_size, &dir);
-    snd_pcm_hw_params_get_buffer_size(params, &buffer_size);
-    ai->alsa.chunk_size = period_size;
-    if (period_size == buffer_size) {
-        MP_ERR(ai, "Can't use period equal to buffer size (%u == %lu)\n", ai->alsa.chunk_size, (long)buffer_size);
-        return -1;
-    }
-
-    snd_pcm_sw_params_current(ai->alsa.handle, swparams);
-    err = snd_pcm_sw_params_set_avail_min(ai->alsa.handle, swparams, ai->alsa.chunk_size);
-
-    err = snd_pcm_sw_params_set_start_threshold(ai->alsa.handle, swparams, 0);
-    err = snd_pcm_sw_params_set_stop_threshold(ai->alsa.handle, swparams, buffer_size);
-
-    if (snd_pcm_sw_params(ai->alsa.handle, swparams) < 0) {
-        MP_ERR(ai, "Unable to install software parameters:\n");
-        snd_pcm_sw_params_dump(swparams, ai->alsa.log);
-        return -1;
-    }
-
-    if (mp_msg_test(ai->log, MSGL_V)) {
-        snd_pcm_dump(ai->alsa.handle, ai->alsa.log);
-    }
-
-    ai->alsa.bits_per_sample = snd_pcm_format_physical_width(SND_PCM_FORMAT_S16);
-    ai->alsa.bits_per_frame = ai->alsa.bits_per_sample * ai->channels;
-    ai->blocksize = ai->alsa.chunk_size * ai->alsa.bits_per_frame / 8;
-    ai->samplesize = ai->alsa.bits_per_sample;
-    ai->bytes_per_sample = ai->alsa.bits_per_sample/8;
-
-    return 0;
-}
-
-int ai_alsa_init(audio_in_t *ai)
-{
-    int err;
-
-    const char *device = ai->alsa.device;
-    if (!device)
-        device = "default";
-
-    err = snd_pcm_open(&ai->alsa.handle, device, SND_PCM_STREAM_CAPTURE, 0);
-    if (err < 0) {
-        MP_ERR(ai, "Error opening audio: %s\n", snd_strerror(err));
-        return -1;
-    }
-
-    err = snd_output_stdio_attach(&ai->alsa.log, stderr, 0);
-
-    if (err < 0) {
-        return -1;
-    }
-
-    err = ai_alsa_setup(ai);
-
-    return err;
-}
-
-#ifndef timersub
-#define timersub(a, b, result) \
-do { \
-        (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
-        (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
-        if ((result)->tv_usec < 0) { \
-                --(result)->tv_sec; \
-                (result)->tv_usec += 1000000; \
-        } \
-} while (0)
-#endif
-
-int ai_alsa_xrun(audio_in_t *ai)
-{
-    snd_pcm_status_t *status;
-    int res;
-
-    snd_pcm_status_alloca(&status);
-    if ((res = snd_pcm_status(ai->alsa.handle, status))<0) {
-        MP_ERR(ai, "ALSA status error: %s", snd_strerror(res));
-        return -1;
-    }
-    if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
-        struct timeval now, diff, tstamp;
-        gettimeofday(&now, 0);
-        snd_pcm_status_get_trigger_tstamp(status, &tstamp);
-        timersub(&now, &tstamp, &diff);
-        MP_ERR(ai, "ALSA xrun!!! (at least %.3f ms long)\n",
-               diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
-        if (mp_msg_test(ai->log, MSGL_V)) {
-            MP_ERR(ai, "ALSA Status:\n");
-            snd_pcm_status_dump(status, ai->alsa.log);
-        }
-        if ((res = snd_pcm_prepare(ai->alsa.handle))<0) {
-            MP_ERR(ai, "ALSA xrun: prepare error: %s", snd_strerror(res));
-            return -1;
-        }
-        return 0;               /* ok, data should be accepted again */
-    }
-    MP_ERR(ai, "ALSA read/write error");
-    return -1;
-}