NY, I am curious how you ended up simulating a DSP in the emulator, and
whether it was effective?
As far as I know the main purpose of the compress/offload feature is to
reduce power consumption,
and I'm wondering whether that is as beneficial in the emulator environment.
On Wednesday, March 9, 2016 at 5:58:59 PM UTC-8, NY wrote:
>
> added below code to audio_policy.conf and push same file to /system/etc
> and ran "adb shell stop media and start" media.
> Now I could see in dumpsys of media.audio_policy with COMPRESS_offload
> flag got enabled.
> However I could not see receiving compressed data to audio_hw.c file
> ,please help me to understand more on this with emulator build.
> compress_offload {
> sampling_rates 8000|11025|16000|22050|32000|44100|48000
> channel_masks AUDIO_CHANNEL_OUT_MONO|AUDIO_CHANNEL_OUT_STEREO
> formats AUDIO_FORMAT_MP3
> devices AUDIO_DEVICE_OUT_SPEAKER|AUDIO_DEVICE_OUT_WIRED_HEADSET|
> AUDIO_DEVICE_OUT_WIRED_HEADPHONE
> flags AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD|
> AUDIO_OUTPUT_FLAG_NON_BLOCKING
> }
> On Tuesday, September 29, 2015 at 12:02:42 PM UTC-7, NY wrote:
>>
>> Thanks ,Finally I found to enable offload audio on emulator.
>>
>> On Tuesday, September 29, 2015 at 9:20:39 AM UTC-7, NY wrote:
>>>
>>> Thanks for your reply,Please provide me pointer if you know someone in
>>> Android Team at Google, who can help me on this?
>>>
>>> On Monday, September 28, 2015 at 2:42:58 PM UTC-7, Glenn Kasten wrote:
>>>>
>>>> Sorry, I don't know how to simulate a DSP on emulator.
>>>>
>>>> On Monday, September 28, 2015 at 12:49:15 PM UTC-7, NY wrote:
>>>>>
>>>>> I actually gone through your post before I post my Question and my
>>>>> question is more about how can we do this in emulator?if so where can we
>>>>> do
>>>>> and collect the compressed data at kernel level.this will halp to
>>>>> simulate
>>>>> the audio dsp on emulator.
>>>>>
>>>>>
>>>>> On Monday, September 28, 2015 at 11:48:19 AM UTC-7, Glenn Kasten wrote:
>>>>>>
>>>>>> See post #4 of
>>>>>> https://groups.google.com/forum/#!topic/android-porting/SBVinW-RHzU
>>>>>> in particular the paragraph that begins "Offloaded tracks are new for
>>>>>> Android 4.4 (KitKat)"
>>>>>> and the next paragraph "To read more "
>>>>>>
>>>>>>
>>>>>> On Monday, September 28, 2015 at 11:41:48 AM UTC-7, YADLA NIRANJAN
>>>>>> wrote:
>>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>> I have built x86_64 emulator from Google latest source code and as
>>>>>>> well compiled goldfish kernel(3.10-m-dev) to generate
>>>>>>> "./arch/x86_64/boot/bzImage"
>>>>>>>
>>>>>>> How to enable audio_offload?, want to enable
>>>>>>> "AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD" flag in audio_policy.conf, however
>>>>>>> I
>>>>>>> could not find this file in /system/etc/
>>>>>>> Assume somehow If we enable audio_offload on emulator build then I
>>>>>>> want to know how to collect compressed audio data at kernel level(may
>>>>>>> be at
>>>>>>> compress_offload.c file ).
>>>>>>>
>>>>>>>
>>>>>>> Build instructions:
>>>>>>> Step1:Got the latest source code from
>>>>>>> http://source.android.com/source/downloading.html
>>>>>>> Built the emulator using below configuration on latest Android
>>>>>>> source code
>>>>>>>
>>>>>>> ============================================
>>>>>>> PLATFORM_VERSION_CODENAME=REL
>>>>>>> PLATFORM_VERSION=5.1.51
>>>>>>> TARGET_PRODUCT=aosp_x86_64
>>>>>>> TARGET_BUILD_VARIANT=eng
>>>>>>> TARGET_BUILD_TYPE=release
>>>>>>> TARGET_BUILD_APPS=
>>>>>>> TARGET_ARCH=x86_64
>>>>>>> TARGET_ARCH_VARIANT=x86_64
>>>>>>> TARGET_CPU_VARIANT=
>>>>>>> TARGET_2ND_ARCH=x86
>>>>>>> TARGET_2ND_ARCH_VARIANT=x86
>>>>>>> TARGET_2ND_CPU_VARIANT=
>>>>>>> HOST_ARCH=x86_64
>>>>>>> HOST_OS=linux
>>>>>>> HOST_OS_EXTRA=Linux-3.13.0-63-generic-x86_64-with-Ubuntu-14.04-trusty
>>>>>>> HOST_CROSS_OS=windows
>>>>>>> HOST_BUILD_TYPE=release
>>>>>>> BUILD_ID=AOSP
>>>>>>> OUT_DIR=out
>>>>>>> ============================================
>>>>>>> ran below command
>>>>>>> $make -j8
>>>>>>>
>>>>>>>
>>>>>>> Step2:Got kernel code using below command
>>>>>>> git clone https://android.googlesource.com/kernel/goldfish.git
>>>>>>> ran below cmds
>>>>>>> $ make x86_64_emu_defconfig
>>>>>>> $ make -j8
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Note:If we successfully be able to write compressed data to a file
>>>>>>> at kernel level, this will allow us to achieve in simulating audio DSP
>>>>>>> on
>>>>>>> emulator build.
>>>>>>>
>>>>>>> Thanks,
>>>>>>> NY
>>>>>>>
>>>>>>
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