Thanks Vishwanath for your suggestions. Indeed that's waht I've tried already. I found several compile errors after placing the folders below in the JB tree. Compilation errors came from files in hardware/alsa_sound which are also present in JB tree under hardware/libhardware_legacy/audio, but with a significantly modified content. Specifically, these ones:
audio_hw_hal.cpp AudioPolicyCompatClient.cpp AudioPolicyCompatClient.h audio_policy_hal.cpp So, my first idea was to pull these files from JB hardware/libhardware_legacy/audio and replace those in hardware/alsa_sound. This makes the build succeed, but during boot of mediaserver a crash is issued while loading my alsa.<device>.so. I know it isn't easy to help without going into the source code details, but what I was looking for is the approach to follow (which Vishwanath sketched below - thanks - but a bit more details would help) and try to understand why some files are found both in my custom hardware/alsa_sound and in hardware/libhardware_legacy/audio. BTW - the project code is hosted here: https://github.com/Renesas-EMEV2 (on branch "emev-4.1") On Fri, Nov 9, 2012 at 4:45 AM, Vishwanath Hegde <vnhe...@gmail.com> wrote: > The approach here would be to place the folders below in respective > folders of JB project tree. > external/alsa-lib > hardware/alsa_sound > > Now don't expect things to work as is. Fix the bugs whatever gets thrown > when you compile it. Check the hardware/alsa_sound folder for the place > where the hardware gets called. There you may have some audio hardware > specific change to take care. This is the portion of code which leads to > crash when you integrate ALSA from some where else. > > Then check the basic commands of ALSA Amixer commands from adb shell to > play /pause/ stop a bare wave file. If that works you are done with your > ALSA integration. > If you encounter any issues, you should suspect your integration, as ALSA > is pretty much independent code, where you may not have issues.Another > place where you might have to debug is audio policy related files. > > > > On Thu, Nov 8, 2012 at 7:12 PM, ffxx68 <ffum...@googlemail.com> wrote: > >> Hi >> >> I'm trying to port a ICS implementation of ALSA audio to JB, or a tablet >> device, under this project: >> >> Mainly, I have the following to integrate (which I have the patch for >> ICS): >> >> external/alsa-lib >> hardware/alsa_sound >> >> plus some other smaller fix around, but I want to understand first of all >> what to do with these two first. >> >> For example, I have the some files with the same names in both >> hardware/alsa_sound and hardware/libhardware_legacy/ >> **audio (from AOSP), but their content is very different in the two >> locations. >> >> If I keep the ones from hardware/alsa_sound, build fails. >> If I copy them from hardware/libhardware_legacy/audio to >> hardware/alsa_sound, I can build but I get a crash during boot. >> >> Which one should I keep and compile? >> Once compiled, which libraries should I use from alsa_sound or >> libhardware_legacy/audio? >> >> Basically, I don't know the approach to follow, with the ALSA >> integration. I couldn't find any guide, or tutorial, so any help in that >> sense is welcome too. >> >> Thanks in advance >> Fabio >> >> -- >> unsubscribe: android-porting+unsubscr...@googlegroups.com >> website: http://groups.google.com/group/android-porting >> > > -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting
