[vlc-devel] [PATCH 2/5] mediacodec: add hevc mimetype

[John Stebbins]

Ok, I discovered that libiomx-kk was disabled in the Makefile.  So enabling this gets me past the issue of missing
libiomx.  It now finds the omx decoder, but fails during setup.  Log leading to error:

10-07 16:43:59.048 D/VLC     ( 5315): iomx decoder: component standard role set to video_decoder.hevc
10-07 16:43:59.048 D/VLC     ( 5315): iomx decoder: HwBuffer_Init
10-07 16:43:59.048 D/VLC     ( 5315): iomx decoder: direct output port enabled
10-07 16:43:59.048 D/VLC     ( 5315): iomx decoder: OMX_SetParameter failed (80001001 : OMX_ErrorUndefined)
10-07 16:43:59.048 D/VLC     ( 5315): iomx decoder: HwBuffer_Stop
10-07 16:43:59.048 D/VLC     ( 5315): iomx decoder: HwBuffer_Stop
10-07 16:43:59.048 D/VLC     ( 5315): iomx decoder: HwBuffer_FreeBuffers
10-07 16:43:59.058 D/VLC     ( 5315): iomx decoder: no component could be initialised

After the error, it falls back to avcodec. I'll add some more logging to narrow down exactly where this is happening later.

On 10/06/2014 05:56 PM, John Stebbins wrote:
> So, it doesn't work on rk3288 out of the box.  And even after some ugly hacks, I'm getting video with green lines
> through it and the image repeated 5 times and squished horizontally.  Not sure what that's all about.
>
> Attaching diff to show ugly hacks and logs just in case you have some ideas what the distorted video might be.
>
> To summarize the hacks, I had to remove the USE_IOMX define because my box does not have libiomx.so.  Then, my box does
> have libOMX_Core.so. but all the symbols are prefixed with "RK".  So I had to modify the dlsym calls.  The rest is just
> debug messages so I can see what's happening.
>
> On 10/03/2014 10:39 AM, Thomas Guillem wrote:
>> Ah yes, I'm curious to know if my patches work on rk32.
>>
>> On Fri, Oct 3, 2014 at 7:29 PM, John Stebbins <stebbins at jetheaddev.com> wrote:
>>> Ok.  I'll test to see if your OMX changes work on my box.  I think they should since I was able to make stagefright
>>> playback in xbmc work.  The Measy is built on the rk3288 SoC.  There are a lot of very cheap (< $100) android players
>>> based on this SoC becoming available now.
>>>
>>> On 10/03/2014 10:05 AM, Thomas Guillem wrote:
>>>> I tested it only on a Nvidia Shield tablet (Tegra K1). It run fine
>>>> (with the others patches).
>>>>
>>>> VLC use the MediaCodec API from JAVA, it's the public API from
>>>> android-sdk that don't change for one manufacturer.
>>>> But all manufacturers can modify the private native API
>>>> (MediaCodec.cpp and co), so that where they add support for extra
>>>> codecs..
>>>>
>>>>
>>>>
>>>> On Fri, Oct 3, 2014 at 6:47 PM, John Stebbins <stebbins at jetheaddev.com> wrote:
>>>>> Hi,
>>>>>
>>>>> Do you have an android box that this works on?  I tested such a patch on my Measy B4S and mediacodec fails during
>>>>> configure.  I did some further research, downloaded android SDK sources for another similar box and looked for
>>>>> problems.  Turns out mediacodec is missing support in other places for hevc.  Specifically, there is a hard coded list
>>>>> of "roles" in one of the functions that doesn't include an hevc decoder role. I see that you have fixed a similar issue
>>>>> in VLCs OMX implementation.
>>>>>
>>>>> I've seen reports that some manufacturers have made hevc mediacodec decode working, so I think some are distributing
>>>>> with modified SDK. Do you have one of these, if so which?
>>>>>
>>>>> --
>>>>> John      GnuPG fingerprint: D0EC B3DB C372 D1F1 0B01  83F0 49F1 D7B2 60D4 D0F7
>>>>>
>>>>>
>>>>>
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>>> John      GnuPG fingerprint: D0EC B3DB C372 D1F1 0B01  83F0 49F1 D7B2 60D4 D0F7
>>>
>>>
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-- 
John      GnuPG fingerprint: D0EC B3DB C372 D1F1 0B01  83F0 49F1 D7B2 60D4 D0F7


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