Date: Tue, 24 Nov 2015 06:45:44 -0300 From: =?UTF-8?B?T3RhY8OtbGlv?= <otacilio.neto@bsd.com.br> To: Hans Petter Selasky <hps@selasky.org>, freebsd-multimedia@freebsd.org Cc: otaciliodearaujo@gmail.com Subject: Re: linux/uvcvideo.h Message-ID: <565431C8.10309@bsd.com.br> In-Reply-To: <56541D9A.3090703@selasky.org> References: <5653D36B.5040906@bsd.com.br> <56541D9A.3090703@selasky.org>
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Em 24/11/2015 05:19, Hans Petter Selasky escreveu:
> On 11/24/15 04:03, Otacílio wrote:
>> Dears
>>
>> I'm compiling a program that uses the header file linux/uvcvideo.h
>>
>> I think that this file must be on v4l_compat but this file is not in
>> v4l_compat-1.6.3*. This file must be add to v4l_compat or this file is
>> not necessary on FreeBSD?
>>
>
> Hi,
>
> Currently the v4l_compat only contains V4L1/2 IOCTLs only.
>
> What API's do you need?
>
> --HPS
>
Hello Sr. Selasky
I'm using a Qualitech C920 camera to get a video stream codified using
the hardware of the camera (H264). The default bitrate of the camera is
about 3500Mbps, so I need change this value to a smaller. Googling I
found a example for Linux that changes the bitrate and I'm using the
example on my software on FreeBSD. The code that I need is this below:
static void setBitrate(int bmin, int bmax){
int res;
struct uvc_xu_control_query ctrl;
uvcx_bitrate_layers_t conf;
ctrl.unit = 12;
ctrl.size = 10;
ctrl.selector = UVCX_BITRATE_LAYERS;
ctrl.data = &conf;
ctrl.query = UVC_GET_CUR;
conf.wLayerID = 0;
conf.dwPeakBitrate = conf.dwAverageBitrate = 0;
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
if (res)
{
perror("ctrl_query");
return;
}
fprintf(stderr, "Bitrate was %d [%d]\n", conf.dwPeakBitrate * 8,
conf.dwAverageBitrate * 8);
conf.dwPeakBitrate = bmax;
conf.dwAverageBitrate = bmin;
ctrl.query = UVC_SET_CUR;
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
if (res)
{
perror("ctrl_query");
return;
}
fprintf(stderr, "Bitrate request %d [%d]\n", conf.dwPeakBitrate * 8,
conf.dwAverageBitrate * 8);
ctrl.query = UVC_GET_CUR;
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
if (res)
{
perror("ctrl_query");
return;
}
fprintf(stderr, "Bitrate now %d [%d]\n", conf.dwPeakBitrate * 8,
conf.dwAverageBitrate * 8);
}
static void setRCMode(int mode){
int res;
struct uvc_xu_control_query ctrl;
uvcx_rate_control_mode_t conf;
ctrl.selector = UVCX_RATE_CONTROL_MODE;
ctrl.size = 3;
ctrl.unit = 12;
ctrl.data = &conf;
ctrl.query = UVC_GET_CUR;
conf.wLayerID = 0;
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
if (res) { perror("query"); return;}
fprintf(stderr, "RC mode was %d\n", (int)conf.bRateControlMode);
conf.bRateControlMode = mode;
ctrl.query = UVC_SET_CUR;
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
if (res) { perror("query"); return;}
fprintf(stderr, "RC mode request %d\n", (int)conf.bRateControlMode);
ctrl.query = UVC_GET_CUR;
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
if (res) { perror("query"); return;}
fprintf(stderr, "RC mode now %d\n", (int)conf.bRateControlMode);
}
So, when I try compile this software I got this errors:
cc -I/usr/local/include -I../Capture\ H264 -I../lib -c -o capture.o
capture.c
capture.c:463:31: error: variable has incomplete type 'struct
uvc_xu_control_query'
struct uvc_xu_control_query ctrl;
^
capture.c:463:10: note: forward declaration of 'struct
uvc_xu_control_query'
struct uvc_xu_control_query ctrl;
^
capture.c:472:20: error: use of undeclared identifier 'UVCIOC_CTRL_QUERY'
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
^
capture.c:482:20: error: use of undeclared identifier 'UVCIOC_CTRL_QUERY'
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
^
capture.c:490:20: error: use of undeclared identifier 'UVCIOC_CTRL_QUERY'
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
^
capture.c:501:31: error: variable has incomplete type 'struct
uvc_xu_control_query'
struct uvc_xu_control_query ctrl;
^
capture.c:501:10: note: forward declaration of 'struct
uvc_xu_control_query'
struct uvc_xu_control_query ctrl;
^
capture.c:509:20: error: use of undeclared identifier 'UVCIOC_CTRL_QUERY'
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
^
capture.c:514:20: error: use of undeclared identifier 'UVCIOC_CTRL_QUERY'
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
^
capture.c:518:20: error: use of undeclared identifier 'UVCIOC_CTRL_QUERY'
res = xioctl(fd, UVCIOC_CTRL_QUERY, &ctrl);
^
8 errors generated.
Makefile:6: recipe for target 'capture.o' failed
gmake: *** [capture.o] Error 1
What is the best solution to this problem? I need add the header file
#include <linux/uvcvideo.h> ?
Thanks a lot!
-Otacílio
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