Hello everyone:
I met a OMX decoder problem when debug gst-openmax on ICS, blaze tablet, that's OMX decoder could only decode several correct yuv frame before event OMX_EventPortSettingsChanged, data_2 = OMX_IndexConfigCommonOutputCrop, after above event receivd, the new released buffer to OMX, will output same yuv hex (in FillBufferDone event). please give me some advices. Thanks in advance.
in gst-openmax our detail flow is:
1) OMX_IndexParamVideoPortFormat, Get/Set both Input port and output port;
2) OMX_IndexParamPortDefinition,
for Input port, correct nFrameWidth, nFrameHeight, eCompressionFormat, eColorFormat, and nBufferSize=64K
for output port, correct nFrameWidth, nFrameHeight,xFramerate
3) native_window_set_crop/ native_window_set_buffer_layout
4) enableGraphic buffer
5) Allocate buffer:
Input port, OMX_AllocateBuffer
Output port, Set up the native window(scaling mode, geometry, usage...),
nativewindow->dequeueBuffer, then OMX_UseBuffer
6) EmptyThisBuffer/FillThisBuffer
7) OMX_EventPortSettingsChanged received (data2=0)
Send command to Disable port. /FreeBuffers
Send command to Enable port. /AllocateBuffers, send the buffers to OMX eg: buffer id= 0, 1, 2, 3, 4 (FillThisBuffer)
8) OMX_EventPortSettingsChanged received (data2= OMX_IndexConfigCommonOutputCrop)
Set native window according to crop, eg: [32, 24, 1280+32, 720+24]; /native_window_set_buffer_layout
9) FillBufferDone received of buffer id= 0,1,2,3,4, and the output raw yuv data are correct, displayed normally on yuv player.
10) During each FillBufferDone, dequeue native window and send buffer (eg, id=5, 6, 7,8,9, 10......) to OMX by fillThisBuffer.
The problem is the output buffers after event OMX_IndexConfigCommonOutputCrop step8, eg the output of buffer 5, the yuv hex value are exactly same with previously buffer 4, hence, buffer 6, 7, 8 are also exactly same with buffer 4;
The output buffer 9 changed, but buffer 10 HEX is same with buffer 9;
The output buffer 11 changed, but buffer 12, 13, 14 HEX are all same with buffer 11;
The output buffer 15 changed, but buffer 16, 17, 18, 19, 20, 21, 22, 23, 24 are exactly same HEX value......
So it seams after receive event OMX_EventPortSettingsChanged(OMX_IndexConfigCommonOutputCrop), the output buffers have same yuv with previouly buffer that'are error, and without error information from OMX or ducati.
Could you give me some advice for my check/debug. Thanks you so much.
