diff options
| author | Clemens Ladisch <clemens@ladisch.de> | 2014-09-21 22:50:57 +0200 |
|---|---|---|
| committer | Zefan Li <lizefan@huawei.com> | 2014-12-01 18:02:36 +0800 |
| commit | d7bbf15e60a6368bb958a52d2e8ac5a18fd4c37e (patch) | |
| tree | 12b7605d4e12b3f9e7e2ef90183537e89bea5169 | |
| parent | 8fcf8e698c8f33ff9f94ad067121e77a9ead6be5 (diff) | |
ALSA: pcm: fix fifo_size frame calculation
commit a9960e6a293e6fc3ed414643bb4e4106272e4d0a upstream.
The calculated frame size was wrong because snd_pcm_format_physical_width()
actually returns the number of bits, not bytes.
Use snd_pcm_format_size() instead, which not only returns bytes, but also
simplifies the calculation.
Fixes: 8bea869c5e56 ("ALSA: PCM midlevel: improve fifo_size handling")
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Zefan Li <lizefan@huawei.com>
| -rw-r--r-- | sound/core/pcm_lib.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 370fc56d2de7..629257585501 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -1693,14 +1693,16 @@ static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, { struct snd_pcm_hw_params *params = arg; snd_pcm_format_t format; - int channels, width; + int channels; + ssize_t frame_size; params->fifo_size = substream->runtime->hw.fifo_size; if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { format = params_format(params); channels = params_channels(params); - width = snd_pcm_format_physical_width(format); - params->fifo_size /= width * channels; + frame_size = snd_pcm_format_size(format, channels); + if (frame_size > 0) + params->fifo_size /= (unsigned)frame_size; } return 0; } |