Hi Yang I am using WM97xx codec and has it's ALSA driver worked. And I also integrated the alsa-lib into my source. Now the audio working fine.
But the only thing I wanna know is : How the asound.conf work and How to write this file. Now I skip this config file and wite the configurations directly into my hardware. Thanks PS: If sb get the error: no such device, please check the alsa-lib ---------- alsa-lib-1.0.13/include/config.h #define ALSA_DEVICE_DIRECTORY "/dev/" The old device path is /dev if Andriod has below update, this value need to be /dev/snd http://review.source.android.com/r/e2ff04fb6804 On 11月26日, 下午5时09分, "Yang, Xiaopeng" <xiaopeng.y...@windriver.com> wrote: > Hi Maxime, > > The ALSA contribution from Wind River includes alsa-lib and > libaudio-alsa libraries, along with other patches for bionic and system/core. > > Because alsa-lib and libaudio-alsa are new projects, they have been sent to > Google for integration, and may be available in the repositories soon. > > The other modifications on bionic and system/core have been submitted to > Gerrit for review: > > -------------------------------------------- > [OK ] bionic/ > defaulthttp://review.source.android.com/r/fad1668b10d5 > (as xiaopeng.y...@windriver.com) > > [OK ] system/core/ > defaulthttp://review.source.android.com/r/e2ff04fb6804 > (as xiaopeng.y...@windriver.com) > > After above projects and patches have been integrated into andorid, you can > build android images with ALSA support. To that end, there are still two > things need to do: > > 1. A /etc/asound.conf is required for ALSA to work. Attached patch adds a > sample asound.conf for zoom board, copy this sample file to > system/core/rootdir/etc/asound.conf and make necessary changes to it > according to your hardware. > > 2. Add the following line into the BoardConfig.mk of your board: > > BOARD_USES_ALSA_AUDIO := true > > then rebuild android to see whether ALSA audio work. > > Regards, > Xiaopeng > > Maxime Petazzoni 写道: > > > > > Hi Sean, > > > Do you have more information to give us about when and how this code > > is going to be available? The implementation proposed down here by > > Misael looks nice too, but I'd like to have a peek about the code you > > used for the Freerunner, and more importantly how you used it. > > > Thanks in advance, > > - Maxime > > > On 12 nov, 05:42, Sean McNeil <seanmcne...@gmail.com> wrote: > >> Hi Maxime, > > >> Wind River is in the process of submitting an ALSA audio implementation. > >> That is what I use on the Openmoko Freerunner and what has been > >> successfully used on the TI OMAP Zoom reference platform. > > >> Maxime Petazzoni wrote: > >>> Hi, > >>> I believe most of the porting efforts on the various hardware platform > >>> will soon get to the point (if not already) of a running system ; the > >>> next step being making sure all the basic functionality is there. > >>> Audio being one of the most important one, since telephony also > >>> depends on it. > >>> Without anything done on that front, we're facing the "using stubbed > >>> audio hardware, no sound will be produced" warning message when Dalvik > >>> starts. > >>> From what I've read, Android relies on an hardware glue library > >>> libaudio, providing AudioFlinger with the appropriate AudioInterface > >>> implementation to output sound to whatever sound driver the hardware > >>> uses. For example, on the HTC G1/MSM72xx hardware platform, Google > >>> useshttp://android.git.kernel.org/?p=platform/hardware/msm7k.git;a=summary > >>> But I think most of the Androids ports are made on hardware that have > >>> ALSA device drivers (OMAP for example). And before 20 different people > >>> start implementing their own libaudio bridging to ALSA, maybe we > >>> should coordinate this community effort. Starting by knowing if > >>> anything has already been started by someone, somewhere :) > >>> If not, I will most likely start working on one, and I foresee that > >>> it's going to be tough, as the only real documentation is the msm7k > >>> libaudio source code itself. > >>> Ideas, comments, suggestions ... and help are most welcome! > >>> - Maxime > >>> PS: of course, if you got audio working without going through this > >>> libaudio stuff, please share your discoveries ! > > > > sample_asound_conf.patch > 3K查看下载- 隐藏被引用文字 - > > - 显示引用的文字 - --~--~---------~--~----~------------~-------~--~----~ unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting -~----------~----~----~----~------~----~------~--~---
