summaryrefslogtreecommitdiffstats
path: root/audio/filter/af_force.c
blob: 765a77750f49538840922c7bd95306b7fbef7eb3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/*
 * 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 <stdlib.h>

#include <libavutil/common.h>

#include "core/m_config.h"
#include "core/m_option.h"

#include "audio/format.h"
#include "af.h"

struct priv {
    struct m_config *config;

    int in_format;
    int in_srate;
    struct mp_chmap in_channels;
    int out_format;
    int out_srate;
    struct mp_chmap out_channels;

    int fail;

    struct mp_audio data;
    struct mp_audio temp;
};

static const struct priv defaults = {
    .in_format = AF_FORMAT_UNKNOWN,
    .out_format = AF_FORMAT_UNKNOWN,
};

#define OPT_BASE_STRUCT struct priv

static const struct m_option options[] = {
    OPT_AUDIOFORMAT("format", in_format, 0),
    OPT_INTRANGE("srate", in_srate, 0, 1000, 8*48000),
    OPT_CHMAP("channels", in_channels, CONF_MIN, .min = 0),
    OPT_AUDIOFORMAT("out-format", out_format, 0),
    OPT_INTRANGE("out-srate", out_srate, 0, 1000, 8*48000),
    OPT_CHMAP("out-channels", out_channels, CONF_MIN, .min = 0),
    OPT_FLAG("fail", fail, 0),
    {0}
};

static int control(struct af_instance *af, int cmd, void *arg)
{
    struct priv *priv = af->setup;

    switch (cmd) {
    case AF_CONTROL_REINIT: {
        struct mp_audio *in = arg;
        struct mp_audio orig_in = *in;
        struct mp_audio *out = af->data;

        if (priv->in_format != AF_FORMAT_UNKNOWN)
            mp_audio_set_format(in, priv->in_format);

        if (priv->in_channels.num)
            mp_audio_set_channels(in, &priv->in_channels);

        if (priv->in_srate)
            in->rate = priv->in_srate;

        mp_audio_copy_config(out, in);

        if (priv->out_format != AF_FORMAT_UNKNOWN)
            mp_audio_set_format(out, priv->out_format);

        if (priv->out_channels.num)
            mp_audio_set_channels(out, &priv->out_channels);

        if (priv->out_srate)
            out->rate = priv->out_srate;

        if (in->nch != out->nch || in->bps != out->bps) {
            mp_msg(MSGT_AFILTER, MSGL_ERR,
                   "[af_force] Forced input/output formats are incompatible.\n");
            return AF_ERROR;
        }

        if (priv->fail) {
            mp_msg(MSGT_AFILTER, MSGL_ERR, "[af_force] Failing on purpose.\n");
            return AF_ERROR;
        }

        return mp_audio_config_equals(in, &orig_in) ? AF_OK : AF_FALSE;
    }
    case AF_CONTROL_COMMAND_LINE: {
        if (m_config_parse_suboptions(priv->config, "af_force", (char *)arg) < 0)
            return AF_ERROR;
        return AF_OK;
    }
    }
    return AF_UNKNOWN;
}

static struct mp_audio *play(struct af_instance *af, struct mp_audio *data)
{
    struct priv *priv = af->setup;
    struct mp_audio *r = &priv->temp;

    *r = *af->data;
    r->audio = data->audio;
    r->len = data->len;

    return r;
}

static void uninit(struct af_instance *af)
{
    talloc_free(af->setup);
}

static int af_open(struct af_instance *af)
{
    af->control = control;
    af->uninit = uninit;
    af->play = play;
    af->mul = 1;
    struct priv *priv = talloc(NULL, struct priv);
    af->setup = priv;
    *priv = defaults;
    priv->config = m_config_simple(priv);
    talloc_steal(priv, priv->config);
    m_config_register_options(priv->config, options);
    af->data = &priv->data;
    return AF_OK;
}

struct af_info af_info_force = {
    "Force audio format",
    "force",
    "",
    "",
    0,
    af_open
};