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mpv/audio/mixer.h
wm4 20988ee607 command: don't allow changing volume if no audio initialized
Changing volume when audio is disabled was a feature request (github
issue #215), and was introduced with commit 327a779.

But trying to fix github issue #280 (volume is not correct in no-audio
mode, and if audio is re-enabled, the volume set in no-audio mode isn't
set), I concluded that it's not worth the trouble and the current
implementation is questionable all around. (For example, you can't
change the real volume in no-audio mode, even if the AO is open - this
could happen with gapless audio.) It's hard to get right, and the
current mixer code is already hilariously overcomplicated. (Virtually
all of mixer.c is an amalgamation of various obscure corner cases.)

So just remove this feature again.

Note that "options/volume" and "options/mute" still can be used in
idle mode to adjust the volume used next time, though these properties
can't be used during playback and thus not in audio-only mode.

Querying the volume still "works" in audio-only mode, though it can
return bogus values.
2013-10-12 18:57:02 +02:00

52 lines
1.7 KiB
C

/*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPLAYER_MIXER_H
#define MPLAYER_MIXER_H
#include <stdbool.h>
// Values of MPOpts.softvol
enum {
SOFTVOL_NO = 0,
SOFTVOL_YES = 1,
SOFTVOL_AUTO = 2,
};
struct MPOpts;
struct ao;
struct af_stream;
struct mixer;
struct mixer *mixer_init(void *talloc_ctx, struct MPOpts *opts);
void mixer_reinit_audio(struct mixer *mixer, struct ao *ao, struct af_stream *af);
void mixer_uninit_audio(struct mixer *mixer);
bool mixer_audio_initialized(struct mixer *mixer);
void mixer_getvolume(struct mixer *mixer, float *l, float *r);
void mixer_setvolume(struct mixer *mixer, float l, float r);
void mixer_incvolume(struct mixer *mixer);
void mixer_decvolume(struct mixer *mixer);
void mixer_getbothvolume(struct mixer *mixer, float *b);
void mixer_setmute(struct mixer *mixer, bool mute);
bool mixer_getmute(struct mixer *mixer);
void mixer_getbalance(struct mixer *mixer, float *bal);
void mixer_setbalance(struct mixer *mixer, float bal);
char *mixer_get_volume_restore_data(struct mixer *mixer);
#endif /* MPLAYER_MIXER_H */