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ALSA: Add snd_pcm_direction_name() helper 

Allow for retrieving string naming a direction of a stream without the
need of substream pointer.

    Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
    Link: https://lore.kernel.org/r/20220511162403.3987658-2-cezary.rojewski@intel.com
    Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Cezary Rojewski <cezary.rojewski@intel.com>
Date: Wed May 11 18:23:50 2022 +0200

Signed-off-by: Jaroslav Kysela <jkysela@redhat.com>
(cherry picked from commit 90b12a88b710cdc80c00552dfbd589228978bffe)
Bugzilla: https://bugzilla.redhat.com/2125537
This commit is contained in:
Jaroslav Kysela 2022-10-10 09:35:48 +02:00
parent 3aa794640a
commit fca5fabf14
1 changed files with 15 additions and 4 deletions
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19
include/sound/pcm.h
View File

@ -1434,6 +1434,20 @@ static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
const char *snd_pcm_format_name(snd_pcm_format_t format);
/**
* snd_pcm_direction_name - Get a string naming the direction of a stream
* @direction: Stream's direction, one of SNDRV_PCM_STREAM_XXX
*
* Returns a string naming the direction of the stream.
*/
static inline const char *snd_pcm_direction_name(int direction)
{
if (direction == SNDRV_PCM_STREAM_PLAYBACK)
return "Playback";
else
return "Capture";
}
/**
* snd_pcm_stream_str - Get a string naming the direction of a stream
* @substream: the pcm substream instance
@ -1442,10 +1456,7 @@ const char *snd_pcm_format_name(snd_pcm_format_t format);
*/
static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
{
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return "Playback";
else
return "Capture";
return snd_pcm_direction_name(substream->stream);
}
/*