[alsa-devel] [PATCH v2 3/4] ALSA: compress: Don't allow paritial drain operations on capture streams

[Takashi Iwai]

On Mon, 22 Jul 2019 11:24:35 +0200,
Charles Keepax wrote:
> 
> Partial drain and next track are intended for gapless playback and
> don't really have an obvious interpretation for a capture stream, so
> makes sense to not allow those operations on capture streams.
> 
> Signed-off-by: Charles Keepax <ckeepax at opensource.cirrus.com>

Applied, thanks.


Takashi

> ---
> 
> Changes since v1:
>  - Continue to allow drain on capture streams.
> 
> Thanks,
> Charles
> 
>  sound/core/compress_offload.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
> index 40dae723c59db..6cf5b8440cf30 100644
> --- a/sound/core/compress_offload.c
> +++ b/sound/core/compress_offload.c
> @@ -834,6 +834,10 @@ static int snd_compr_next_track(struct snd_compr_stream *stream)
>  	if (stream->runtime->state != SNDRV_PCM_STATE_RUNNING)
>  		return -EPERM;
>  
> +	/* next track doesn't have any meaning for capture streams */
> +	if (stream->direction == SND_COMPRESS_CAPTURE)
> +		return -EPERM;
> +
>  	/* you can signal next track if this is intended to be a gapless stream
>  	 * and current track metadata is set
>  	 */
> @@ -861,6 +865,10 @@ static int snd_compr_partial_drain(struct snd_compr_stream *stream)
>  		break;
>  	}
>  
> +	/* partial drain doesn't have any meaning for capture streams */
> +	if (stream->direction == SND_COMPRESS_CAPTURE)
> +		return -EPERM;
> +
>  	/* stream can be drained only when next track has been signalled */
>  	if (stream->next_track == false)
>  		return -EPERM;
> -- 
> 2.11.0
> 
>