i.MX ProcessorsのトピックVPU vpu_EncStartOneFrame error https://community.nxp.com/t5/i-MX-Processors/VPU-vpu-EncStartOneFrame-error/m-p/451977#M70201 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>I'm a newbie with VPU enconding and I'm trying to encode a YUV422 buffer to MJPEG. I've read freescale documentation (VPU Application Programming Interface Linux Reference Manual) and I found some hints from <A href="https://github.com/boundarydevices/imx-utils/blob/master/imx_mjpeg_encoder.cpp" title="https://github.com/boundarydevices/imx-utils/blob/master/imx_mjpeg_encoder.cpp">https://github.com/boundarydevices/imx-utils/blob/master/imx_mjpeg_encoder.cpp</A>. Now, I'm trying it with a ov5640 mipi camera but my application fails calling <STRONG>vpu_EncStartOneFrame</STRONG> with a "<STRONG>Floating point exception</STRONG>" error. I don't know how to debug it, the fbuffer used in structure EncParam seems to be ok.</P><P>Could someone give me some help? What could spawn this error?</P><P></P><P>thank you for the attention,</P><P>best regards</P><P>Andrea</P></BODY></HTML> Tue, 15 Sep 2015 08:33:52 GMT adc1 2015-09-15T08:33:52Z VPU vpu_EncStartOneFrame error https://community.nxp.com/t5/i-MX-Processors/VPU-vpu-EncStartOneFrame-error/m-p/451977#M70201 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>I'm a newbie with VPU enconding and I'm trying to encode a YUV422 buffer to MJPEG. I've read freescale documentation (VPU Application Programming Interface Linux Reference Manual) and I found some hints from <A href="https://github.com/boundarydevices/imx-utils/blob/master/imx_mjpeg_encoder.cpp" title="https://github.com/boundarydevices/imx-utils/blob/master/imx_mjpeg_encoder.cpp">https://github.com/boundarydevices/imx-utils/blob/master/imx_mjpeg_encoder.cpp</A>. Now, I'm trying it with a ov5640 mipi camera but my application fails calling <STRONG>vpu_EncStartOneFrame</STRONG> with a "<STRONG>Floating point exception</STRONG>" error. I don't know how to debug it, the fbuffer used in structure EncParam seems to be ok.</P><P>Could someone give me some help? What could spawn this error?</P><P></P><P>thank you for the attention,</P><P>best regards</P><P>Andrea</P></BODY></HTML> Tue, 15 Sep 2015 08:33:52 GMT https://community.nxp.com/t5/i-MX-Processors/VPU-vpu-EncStartOneFrame-error/m-p/451977#M70201 adc1 2015-09-15T08:33:52Z Re: VPU vpu_EncStartOneFrame error https://community.nxp.com/t5/i-MX-Processors/VPU-vpu-EncStartOneFrame-error/m-p/451978#M70202 <HTML><HEAD></HEAD><BODY><P>I reply by myself,</P><P>delving vpu source code, I found out that on structure <STRONG>EncMjpgParam</STRONG> mjpg_hufTable and mjpg_qMatTable shouldn't be used on mx6 platform but in their place huffVal, huffBits, qMatTab and cInfoTab must be initialized. The "Floating point exception" error were caused by a division by zero with uninitialized qMatTab matrix elements in function JpgEncLoadQMatTab (vpu_util.c).</P><P>regards</P><P>Andrea</P></BODY></HTML> Wed, 16 Sep 2015 07:52:34 GMT https://community.nxp.com/t5/i-MX-Processors/VPU-vpu-EncStartOneFrame-error/m-p/451978#M70202 adc1 2015-09-16T07:52:34Z