diff options
| author | Oldřich Jedlička <oldium.pro@seznam.cz> | 2009-08-18 23:24:54 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-12 19:19:13 +0400 |
| commit | 7b54360293c9d72b54e462d146c9376287d2f71b (patch) | |
| tree | 16309986cc3b89e26ae580638b099f05b3814f11 | |
| parent | 89dec01b7e251697720ac3d6a5310d72359eba69 (diff) | |
| download | linux-7b54360293c9d72b54e462d146c9376287d2f71b.tar.xz | |
V4L/DVB (12490): Report only 32kHz for ALSA
There are several reasons:
- SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
only
- SAA7134 for TV mode uses DemDec mode (32kHz)
- Radio works in 32kHz only
- When recording 48kHz from Line1/Line2, switching of capture source to TV
means switching to 32kHz without any frequency translation
Signed-off-by: Oldřich Jedlička <oldium.pro@seznam.cz>
Acked-by: hermann pitton <hermann-pitton@arcor.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/saa7134/saa7134-alsa.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c index 8b0b64a89874..7c0a3a3d61a6 100644 --- a/drivers/media/video/saa7134/saa7134-alsa.c +++ b/drivers/media/video/saa7134/saa7134-alsa.c @@ -435,6 +435,16 @@ snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream) /* * ALSA hardware capabilities definition + * + * Report only 32kHz for ALSA: + * + * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz + * only + * - SAA7134 for TV mode uses DemDec mode (32kHz) + * - Radio works in 32kHz only + * - When recording 48kHz from Line1/Line2, switching of capture source to TV + * means + * switching to 32kHz without any frequency translation */ static struct snd_pcm_hardware snd_card_saa7134_capture = @@ -448,9 +458,9 @@ static struct snd_pcm_hardware snd_card_saa7134_capture = SNDRV_PCM_FMTBIT_U8 | \ SNDRV_PCM_FMTBIT_U16_LE | \ SNDRV_PCM_FMTBIT_U16_BE, - .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000, + .rates = SNDRV_PCM_RATE_32000, .rate_min = 32000, - .rate_max = 48000, + .rate_max = 32000, .channels_min = 1, .channels_max = 2, .buffer_bytes_max = (256*1024), |