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Signed-off-by: Kuninori Morimoto --- include/sound/pcm.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/include/sound/pcm.h b/include/sound/pcm.h index ac8f3aef92052..69e535aeb8e82 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -502,6 +502,35 @@ struct snd_pcm_substream { #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) +static inline int snd_pcm_direction_is_playback(const int stream) +{ + return stream == SNDRV_PCM_STREAM_PLAYBACK; +} + +static inline int snd_pcm_direction_is_capture(const int stream) +{ + return stream == SNDRV_PCM_STREAM_CAPTURE; +} + +static inline int snd_pcm_substream_is_playback(const struct snd_pcm_substream *substream) +{ + return snd_pcm_direction_is_playback(substream->stream); +} + +static inline int snd_pcm_substream_is_capture(const struct snd_pcm_substream *substream) +{ + return snd_pcm_direction_is_capture(substream->stream); +} + +#define snd_pcm_is_playback(x) _Generic((x), \ + struct snd_pcm_substream *: snd_pcm_substream_is_playback, \ + const struct snd_pcm_substream *: snd_pcm_substream_is_playback, \ + default : snd_pcm_direction_is_playback)(x) + +#define snd_pcm_is_capture(x) _Generic((x), \ + struct snd_pcm_substream *: snd_pcm_substream_is_capture, \ + const struct snd_pcm_substream *: snd_pcm_substream_is_capture, \ + default : snd_pcm_direction_is_capture)(x) struct snd_pcm_str { int stream; /* stream (direction) */