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Commit 51f3c669 authored by Eric Laurent's avatar Eric Laurent
Browse files

audio hal: mmap capture mute 

Implement in_set_gain() input stream method for mmap capture
use case only in order to enable silencing the memory mapped
capture buffer at the source.

Bug: 72134552
Test: manual
Change-Id: Ifda75ebb47b31cc2f35e7b68761dcc11f084282b
parent 723c9260

hal/audio_hw.c

+36 −2
Original line number Diff line number Diff line
@@ -73,6 +73,10 @@ 
/* treat as unsigned Q1.13 */

#define VOIP_PLAYBACK_VOLUME_MAX 0x2000



#define RECORD_GAIN_MIN 0.0f

#define RECORD_GAIN_MAX 1.0f

#define RECORD_VOLUME_CTL_MAX 0x2000



#define PROXY_OPEN_RETRY_COUNT           100

#define PROXY_OPEN_WAIT_TIME             20
@@ -3499,9 +3503,39 @@ static char* in_get_parameters(const struct audio_stream *stream, 
    return str;

}



static int in_set_gain(struct audio_stream_in *stream __unused, float gain __unused)

static int in_set_gain(struct audio_stream_in *stream, float gain)

{

    struct stream_in *in = (struct stream_in *)stream;

    char mixer_ctl_name[128];

    struct mixer_ctl *ctl;

    int ctl_value;



    ALOGV("%s: gain %f", __func__, gain);



    if (stream == NULL)

        return -EINVAL;



    /* in_set_gain() only used to silence MMAP capture for now */

    if (in->usecase != USECASE_AUDIO_RECORD_MMAP)

        return -ENOSYS;



    snprintf(mixer_ctl_name, sizeof(mixer_ctl_name), "Capture %d Volume", in->pcm_device_id);



    ctl = mixer_get_ctl_by_name(in->dev->mixer, mixer_ctl_name);

    if (!ctl) {

        ALOGW("%s: Could not get ctl for mixer cmd - %s",

              __func__, mixer_ctl_name);

        return -ENOSYS;

    }



    if (gain < RECORD_GAIN_MIN)

        gain  = RECORD_GAIN_MIN;

    else if (gain > RECORD_GAIN_MAX)

         gain = RECORD_GAIN_MAX;

    ctl_value = (int)(RECORD_VOLUME_CTL_MAX * gain);



    mixer_ctl_set_value(ctl, 0, ctl_value);

    return 0;

}



static void in_snd_mon_cb(void * stream, struct str_parms * parms)