Many drivers are using below code to know the direction.
if (direction == SNDRV_PCM_STREAM_PLAYBACK)
Add snd_pcm_is_playback/capture() macro to handle it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
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) */
--
2.43.0
