From 9835197004d3cc8362791e5a4db613d8e2b25b46 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 18 Aug 2009 19:24:54 +0000 Subject: Report only 32kHz for ALSA MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Oldřich Jedlička 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 Acked-by: hermann pitton Signed-off-by: Mauro Carvalho Chehab --- linux/drivers/media/video/saa7134/saa7134-alsa.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'linux') diff --git a/linux/drivers/media/video/saa7134/saa7134-alsa.c b/linux/drivers/media/video/saa7134/saa7134-alsa.c index c09ec3e6f..504186ae6 100644 --- a/linux/drivers/media/video/saa7134/saa7134-alsa.c +++ b/linux/drivers/media/video/saa7134/saa7134-alsa.c @@ -440,6 +440,16 @@ 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 = @@ -453,9 +463,9 @@ 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), -- cgit v1.2.3