mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-10-29 05:40:25 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

pcm: hw: minor refactoring for initialization of control data

Browse source 
At failure of control data mapping, alsa-lib goes to fallback mode. In
this mode, a buffer is kept in user space and executes ioctl(2) with
SNDRV_PCM_IOCTL_SYNC_PTR for the buffer to synchronize the control data.

In current implementation, no helper function is used for initialize
the control data. This commit use an proper helper function instead of
a direct call of ioctl(2).

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2017-06-30 20:00:26 +09:00 • committed by Takashi Iwai
parent 5c9582b8b4
commit 4396c83a4d
1 changed files with 2 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/pcm/pcm_hw.c
View file

@ -957,11 +957,9 @@ static int map_status_and_control_data(snd_pcm_t *pcm, bool force_fallback)
snd_pcm_set_appl_ptr(pcm, &hw->mmap_control->appl_ptr, hw->fd,
SNDRV_PCM_MMAP_OFFSET_CONTROL);
if (hw->mmap_control_fallbacked) {
if (ioctl(hw->fd, SNDRV_PCM_IOCTL_SYNC_PTR, hw->sync_ptr) < 0) {
err = -errno;
SYSMSG("SNDRV_PCM_IOCTL_SYNC_PTR failed (%i)", err);
err = sync_ptr1(hw, 0);
if (err < 0)
return err;
}
}
return 0;