Re: [PATCH] audio: fix audio recording

["Zoltán Kővágó" <dirty.ice.hu@gmail.com>]

On 2019-11-19 07:58, Volker Rümelin wrote:
> With current code audio recording with all audio backends
> except PulseAudio and DirectSound is broken. The generic audio
> recording buffer management forgot to update the current read
> position after a read.

Indeed, pos_emul is updated in audio_generic_put_buffer_out_nowrite but 
it's never updated on the capture end.  I tested it with alsa and 
hda-micro and it fixes the problem (that is, if I add in.try-poll=off, 
but I need that for output too).

Thanks.

> 
> Fixes: ff095e5231 "audio: api for mixeng code free backends"
> 
> Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Reviewed-by: Zoltán Kővágó <DirtY.iCE.hu@gmail.com>

> ---
>   audio/audio.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/audio/audio.c b/audio/audio.c
> index 7fc3aa9d16..56fae55047 100644
> --- a/audio/audio.c
> +++ b/audio/audio.c
> @@ -1390,6 +1390,7 @@ void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size)
>           size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul,
>                                           read_len);
>           hw->pending_emul += read;
> +        hw->pos_emul = (hw->pos_emul + read) % hw->size_emul;
>           if (read < read_len) {
>               break;
>           }
>