From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mohammad Bahathir Hashim Subject: Re: ALSA Multichannel through HDMI Date: Thu, 25 Nov 2010 05:10:34 +0000 (UTC) Message-ID: References: <20100112045102.GA29735@localhost> <20100112132140.GA7647@localhost> <20100113010942.GA6435@localhost> <20100113014550.GA10184@localhost> <20100113045238.GB26275@localhost> <20100113050254.GA28475@localhost> Reply-To: Mohammad Bahathir Hashim Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by alsa0.perex.cz (Postfix) with ESMTP id 141B71037EA for ; Thu, 25 Nov 2010 06:10:48 +0100 (CET) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1PLU6Z-0004NV-Oq for alsa-devel@alsa-project.org; Thu, 25 Nov 2010 06:10:47 +0100 Received: from 203.106.17.237 ([203.106.17.237]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 25 Nov 2010 06:10:47 +0100 Received: from bahathir by 203.106.17.237 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 25 Nov 2010 06:10:47 +0100 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org On 2010-11-25, John Ettedgui wrote: > On Wed, Nov 24, 2010 at 7:59 PM, Mohammad Bahathir Hashim > wrote: >> On 2010-11-24, John Ettedgui wrote: >>> On Tue, Jan 12, 2010 at 9:02 PM, Wu Fengguang wrote: >>> I am sorry to resurrect this thread after so long, but I still have >>> not been able to get anywhere. >>> Also it just came to my attention that if my receiver always sees the >>> hdmi connection as stereo (apart from when using ac3/dts passthrough) >>> channel remapping is not the solution, but somehow something else is >>> messed up. >>> >>> I think I should try some options in modprobe.conf for snd-hda-intel >>> but I am not sure which ones, and from all the examples I can find on >>> the web, it seems none of them are talking about a radeon hdmi >>> connection... >>> >>> So I'm asking for advice here again :) >>> >>> Thanks! >>> _______________________________________________ >>> Alsa-devel mailing list >>> Alsa-devel@alsa-project.org >>> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel >> >> >> >> Hi, I think there are developments in ffmpeg projects, to support >> multichannel passthrough through HDMI, ALSO only provides infra and >> interface to the HDMI. The passthrough decoding is handled by apps. >> >> >> Here is the snippet from the ffmpeg's 'svn log' >> ------------------------------------------------------------------------ >> r25760 | cehoyos | 2010-11-17 20:22:59 +0800 (Wed, 17 Nov 2010) | 6 lines >> >> Add support for IEC 61937 ("SPDIF") encapsulation for E-AC-3. >> Only works via HDMI. >> >> Patch by Anssi Hannula (anssi d hannula a iki d fi), based on some work >> by myself. >> ------------------------------------------------------------------------ >> >> You can search in ffmpeg's development's mailing list for more information. >> >> Thank you. >> > Hey Mohammad, > > I'm actually trying to get a 5.1 setup working without passthrough, if > I use mplayer with passthrough my receiver behaves just fine, but I am > trying to send the 6 channels from the computer. > > I was actually told that the current ALSA driver for radeon's hdmi > does not support more than 2 channels, and that would explain why I'm > getting this behavior. Is that true though? > > > Thanks! > John Currently, I don't have HT AVR with HDMI, but for normal SPDIF through TOSLINK will stream any standard 5.1 DTS/AC3 raw bitstream to my cheap AVR (Yamaha RX-V361) without any problem. $ mplayer -ao alsa:device=spdif -ac hwdts,hwac3, foo.mkv It is not about how many channels that HDMI can support, but how to pass the bitstream correctly to the receiver. As we can see in this thread, the support for higher bandwidth/format of the DTS/AC3 format is currently being developed by Anssi Hannula. http://article.gmane.org/gmane.comp.video.ffmpeg.devel/121073/ Eventually it will be incorprated in MPlayer-svn. Thank you.