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Hosted PCM: Rework auto-muting code a bit

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* If AUDIOHW_MUTE_ON_PAUSE, no meaningful change
     * Unconditionally unmute on playback start
     * xduoox3ii:  Mute on sample rate change
     * rocker/xduoo:  Stay muted after startup

    This avoids the nasty "pop" on startup, without doing
    the full mute-on-pause stuff that causes unacceptable
    dropouts on the X3ii.

Change-Id: I2e3ee0bb8094e288f37a0acada86a80016ce5cac
This commit is contained in:
Solomon Peachy 2020-10-12 09:29:21 -04:00
parent 9ad30869b8
commit 141e91ef1f
5 changed files with 44 additions and 22 deletions
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8
firmware/export/xduoolinux_codec.h
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@ -6,6 +6,14 @@ AUDIOHW_SETTING(VOLUME, "dB", 0, 1, -127, 0, -30)
AUDIOHW_SETTING(FILTER_ROLL_OFF, "", 0, 1, 0, 4, 0)
#endif
// We want this, but the codec takes over a second to unmute!
//#define AUDIOHW_MUTE_ON_PAUSE
#if defined(XDUOO_X3II)
/* The AK4490 glitches when switching sample rates */
#define AUDIOHW_MUTE_ON_SRATE_CHANGE
#endif
void audiohw_mute(int mute);
void xduoo_set_output(int ps);
int xduoo_get_outputs(void);