-----Original Message----- From: alsa-devel-bounces@alsa-project.org [mailto:alsa-devel-bounces@alsa-project.org] On Behalf Of Takashi Iwai Sent: Tuesday, August 07, 2012 3:50 PM To: Wang, Xingchao Cc: alsa-devel@alsa-project.org Subject: Re: [alsa-devel] [PATCH] ALSA: hda - Set channels count for HBR format
At Tue, 7 Aug 2012 07:40:40 +0000, Wang, Xingchao wrote:
Hi Takashi,
When test HBR feature, unless specify the channel number in command
line(as below), alsa will be confused about the real channel number.
aplay -D hdmi:DEV=1,AES0=0x06 -c8 -fs16_le -r192000 testi.dtshd.20120730.ma-71-24.spdif
But is_hbr_format() assumes the channels must be 8.
#define is_hbr_format(format) \ ((format & AC_FMT_TYPE_NON_PCM) && (format & AC_FMT_CHAN_MASK) == 7)
where format value is computed from runtime->channels in snd_hda_calc_stream_format().
Oh yes, thanks for clarification, I did not read this code carefully. :) I thought the case without setting channels number as 8 from pulseaudio and it's HBR stream in fact.
I've not test HBR stream playback from pulseaduio pass-through mode yet, when that happen and I will Write a new patch then.
So this patch is redundant, just ignore it.
Thanks --xingchao
So, passing anything else than 8 is simply invalid as HBR.
If the HBR stream is gone through pulseaudio(regarded as passthrough), the
channels number is faked.
That is, this is simply a wrong operation.
Takashi
Thanks --xingchao
-----Original Message----- From: alsa-devel-bounces@alsa-project.org [mailto:alsa-devel-bounces@alsa-project.org] On Behalf Of Wang Xingchao Sent: Tuesday, August 07, 2012 3:20 PM To: alsa-devel@alsa-project.org; tiwai@suse.de Cc: Wang, Xingchao Subject: [alsa-devel] [PATCH] ALSA: hda - Set channels count for HBR format
If it's HBR format, the channels count should be 8.
Signed-off-by: Wang Xingchao xingchao.wang@intel.com
sound/pci/hda/patch_hdmi.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index ad319d4..ae4e67e 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1153,8 +1153,11 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, struct hdmi_spec *spec = codec->spec; int pin_idx = hinfo_to_pin_index(spec, hinfo); hda_nid_t pin_nid = spec->pins[pin_idx].pin_nid;
- hdmi_set_channel_count(codec, cvt_nid, substream->runtime->channels);
- if (is_hbr_format(format))
hdmi_set_channel_count(codec, cvt_nid, 8);- else
hdmi_set_channel_count(codec, cvt_nid,substream->runtime->channels);
hdmi_setup_audio_infoframe(codec, pin_idx, substream);
-- 1.7.9.5
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