diff options
| author | Jaroslav Kysela <perex@perex.cz> | 2009-04-27 03:44:40 -0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-05-29 05:47:33 -0400 |
| commit | 8bea869c5e56234990e6bad92a543437115bfc18 (patch) | |
| tree | 7d0a5c4eeeeb69623066eccb363f35e0f2e3fda6 /include/sound/asound.h | |
| parent | e93721a70263afefbac781f575bfe851c6f95d84 (diff) | |
ALSA: PCM midlevel: improve fifo_size handling
Move the fifo_size assignment to hw->ioctl callback to allow lowlevel
drivers overwrite the default behaviour.
fifo_size is in frames not bytes as specified in asound.h and alsa-lib's
documentation, but most hardware have fixed byte based FIFOs. Introduce
internal SNDRV_PCM_INFO_FIFO_IN_FRAMES.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/asound.h')
| -rw-r--r-- | include/sound/asound.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/asound.h b/include/sound/asound.h index 6add80fc2512..82aed3f47534 100644 --- a/include/sound/asound.h +++ b/include/sound/asound.h | |||
| @@ -255,6 +255,7 @@ typedef int __bitwise snd_pcm_subformat_t; | |||
| 255 | #define SNDRV_PCM_INFO_HALF_DUPLEX 0x00100000 /* only half duplex */ | 255 | #define SNDRV_PCM_INFO_HALF_DUPLEX 0x00100000 /* only half duplex */ |
| 256 | #define SNDRV_PCM_INFO_JOINT_DUPLEX 0x00200000 /* playback and capture stream are somewhat correlated */ | 256 | #define SNDRV_PCM_INFO_JOINT_DUPLEX 0x00200000 /* playback and capture stream are somewhat correlated */ |
| 257 | #define SNDRV_PCM_INFO_SYNC_START 0x00400000 /* pcm support some kind of sync go */ | 257 | #define SNDRV_PCM_INFO_SYNC_START 0x00400000 /* pcm support some kind of sync go */ |
| 258 | #define SNDRV_PCM_INFO_FIFO_IN_FRAMES 0x80000000 /* internal kernel flag - FIFO size is in frames */ | ||
| 258 | 259 | ||
| 259 | typedef int __bitwise snd_pcm_state_t; | 260 | typedef int __bitwise snd_pcm_state_t; |
| 260 | #define SNDRV_PCM_STATE_OPEN ((__force snd_pcm_state_t) 0) /* stream is open */ | 261 | #define SNDRV_PCM_STATE_OPEN ((__force snd_pcm_state_t) 0) /* stream is open */ |