If someone know if the Histogram/3A engine (hardware) and the API Davinci
DM6441 equal to the Histogram/3A engine (hardware) API of DM355?
Can I use kind Configuration for Davinci DM6441?
I try to open and set the parameters, in order to read the Statistics.
Below configuration for dm355:
/* Allocate Memory For Configuration Structure */
config = (struct aew_configuration *)malloc(sizeof(struct
aew_configuration));
config->window_config.width = 8;
config->window_config.height = 8;
config->window_config.hz_line_incr = 2;
config->window_config.vt_line_incr = 2;
config->window_config.vt_cnt = 8;
config->window_config.hz_cnt = 8;
config->window_config.vt_start = 4;
config->window_config.hz_start = 4;
config->blackwindow_config.height = 8;
config->blackwindow_config.vt_start = 2;
/* Enable ALaw */
config->alaw_enable = H3A_AEW_DISABLE;
/* Set Saturation limit */
config->saturation_limit = 255;
/* Call AEW_S_PARAM to do the configuration */
buff_size = ioctl(fd, AEW_S_PARAM, config);
if (buff_size < 0) {
printf("ioctl AEW_S_PARAM fail \n");
return -1;
}
Segal Eran
E-mail: [email protected]
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
Jean-Philippe François
Sent: Friday, September 18, 2009 9:44 AM
To: Karicheri, Muralidharan
Cc: [email protected]
Subject: Re: H3A AEW driver : documentation or example user code.
Karicheri, Muralidharan a écrit :
> jean=Philippe,
>
> The driver just dump the statistics as read from the hardware. The VPFE
Programmers Reference Guide (PRG) explains how the information is packed in
memory.I am not sure if a customer needs to sign any NDA to get the details.
> Please check with TI support channel if that is the case.
>
> The driver works in the following way. Application sets configuration
about
> number of paxels/windows etc in the driver after opening the aew device
> and start capture in VPFE. Application then issues a read call to the
device for statistics. The isr kicks in when statistics is available. The
application read call will get unblocked when isr happens and the data
> is copied to user space. The Application needs to process the raw data
> using the packing information specified in the PRG.
>
I figured this, but the devil hides in the details.
I guess my setup is wrong, or the data packing I use is wrong, because
the data I read are meaningless.
The window count must be correct, because the read size is ok
I will look for this PRG and eventually check with TI if not publicly
available.
Thank you
Jean-Philippe François
> Murali Karicheri
> Software Design Engineer
> Texas Instruments Inc.
> Germantown, MD 20874
> new phone: 301-407-9583
> Old Phone : 301-515-3736 (will be deprecated)
> email: [email protected]
>
>> -----Original Message-----
>> From: davinci-linux-open-source-bounces+m-
>> [email protected] [mailto:davinci-linux-open-source-
>> [email protected]] On Behalf Of Jean-
>> Philippe François
>> Sent: Thursday, September 17, 2009 11:16 AM
>> To: [email protected]
>> Subject: H3A AEW driver : documentation or example user code.
>>
>> Hi,
>>
>> I have some trouble understanding how the H3A hardware is supposed
>> to work. Is there some documentation or example of user code usage ?
>>
>> I have some code using the driver, but I don't understand the result,
>> and reading the driver code or the documentation is not very helpful.
>>
>> THis is on DM365, with the latest TI provided LSP.
>>
>> Thank You
>>
>> Jean-Philippe François
>>
>> _______________________________________________
>> Davinci-linux-open-source mailing list
>> [email protected]
>> http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
>
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