diff options
| author | Takashi Iwai <tiwai@suse.de> | 2017-05-24 18:51:30 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-06-02 20:38:20 +0300 |
| commit | 6ba63929ae76e5aaafa14021517fab41cfcd5c83 (patch) | |
| tree | 3a3f29a7a99da4fe7415cd26e0b0dccf9a228080 /sound/core/pcm_lib.c | |
| parent | 2ae48354a1a7afbec0c61280e6410a90894a21e7 (diff) | |
| download | linux-6ba63929ae76e5aaafa14021517fab41cfcd5c83.tar.xz | |
ALSA: pcm: Check PCM state by a common helper function
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm_lib.c')
| -rw-r--r-- | sound/core/pcm_lib.c | 81 |
1 files changed, 29 insertions, 52 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 9c5fe62e2c51..5fcd798672b4 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -2019,6 +2019,22 @@ typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwof unsigned long data, unsigned int off, snd_pcm_uframes_t size); +static int pcm_accessible_state(struct snd_pcm_runtime *runtime) +{ + switch (runtime->status->state) { + case SNDRV_PCM_STATE_PREPARED: + case SNDRV_PCM_STATE_RUNNING: + case SNDRV_PCM_STATE_PAUSED: + return 0; + case SNDRV_PCM_STATE_XRUN: + return -EPIPE; + case SNDRV_PCM_STATE_SUSPENDED: + return -ESTRPIPE; + default: + return -EBADFD; + } +} + static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, unsigned long data, snd_pcm_uframes_t size, @@ -2035,21 +2051,9 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, return 0; snd_pcm_stream_lock_irq(substream); - switch (runtime->status->state) { - case SNDRV_PCM_STATE_PREPARED: - case SNDRV_PCM_STATE_RUNNING: - case SNDRV_PCM_STATE_PAUSED: - break; - case SNDRV_PCM_STATE_XRUN: - err = -EPIPE; - goto _end_unlock; - case SNDRV_PCM_STATE_SUSPENDED: - err = -ESTRPIPE; - goto _end_unlock; - default: - err = -EBADFD; + err = pcm_accessible_state(runtime); + if (err < 0) goto _end_unlock; - } runtime->twake = runtime->control->avail_min ? : 1; if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) @@ -2085,16 +2089,9 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, snd_pcm_stream_lock_irq(substream); if (err < 0) goto _end_unlock; - switch (runtime->status->state) { - case SNDRV_PCM_STATE_XRUN: - err = -EPIPE; - goto _end_unlock; - case SNDRV_PCM_STATE_SUSPENDED: - err = -ESTRPIPE; + err = pcm_accessible_state(runtime); + if (err < 0) goto _end_unlock; - default: - break; - } appl_ptr += frames; if (appl_ptr >= runtime->boundary) appl_ptr -= runtime->boundary; @@ -2265,27 +2262,14 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, return 0; snd_pcm_stream_lock_irq(substream); - switch (runtime->status->state) { - case SNDRV_PCM_STATE_PREPARED: - if (size >= runtime->start_threshold) { - err = snd_pcm_start(substream); - if (err < 0) - goto _end_unlock; - } - break; - case SNDRV_PCM_STATE_DRAINING: - case SNDRV_PCM_STATE_RUNNING: - case SNDRV_PCM_STATE_PAUSED: - break; - case SNDRV_PCM_STATE_XRUN: - err = -EPIPE; - goto _end_unlock; - case SNDRV_PCM_STATE_SUSPENDED: - err = -ESTRPIPE; - goto _end_unlock; - default: - err = -EBADFD; + err = pcm_accessible_state(runtime); + if (err < 0) goto _end_unlock; + if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && + size >= runtime->start_threshold) { + err = snd_pcm_start(substream); + if (err < 0) + goto _end_unlock; } runtime->twake = runtime->control->avail_min ? : 1; @@ -2329,16 +2313,9 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, snd_pcm_stream_lock_irq(substream); if (err < 0) goto _end_unlock; - switch (runtime->status->state) { - case SNDRV_PCM_STATE_XRUN: - err = -EPIPE; - goto _end_unlock; - case SNDRV_PCM_STATE_SUSPENDED: - err = -ESTRPIPE; + err = pcm_accessible_state(runtime); + if (err < 0) goto _end_unlock; - default: - break; - } appl_ptr += frames; if (appl_ptr >= runtime->boundary) appl_ptr -= runtime->boundary; |