How to use the vpu lib (base on C)on our firfly-rk3288

isle

as you gus know .the vpu works fine on our android os. and we can use it by android api "mediacodec".

today.i will to show you how to use it directly.

the libs we need :

1. LOCAL_SHARED_LIBRARIES := \
   
2.         libvpu \
   
3.         librk_on2 \
   
4.         libcutils \
   
5.         liblog \

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the head file path

1. LOCAL_C_INCLUDES := \
   
2. $(TOP)/hardware/rk29/libon2/

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actualy ,we need :
hardware/rk29/libon2/vpu_api.h
hardware/rk29/libon2/vpu_global.h
hardware/rk29/libon2/vpu_mem.h


first of all , open the vpu and get the context:

1.     struct VpuCodecContext* ctx=NULL;
   
2.     vpu_open_context(&ctx);

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then ,  initialize it:

1.     ctx->codecType=cmd->codec_type;  // CODEC_DECODER?
   
2.     ctx->videoCoding=cmd->coding;   
   
3.     ctx->width=cmd->width;
   
4.     ctx->height=cmd->height;
   
5.     ctx->no_thread=1;
   
6. 
   
7.     ret=ctx->init(ctx, pExtra, extraSize)

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now we can do decode ：
get a packet from your file .

1. VideoPacket_t* pkt =NULL;

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after decoding :

1. ret=ctx->decode(ctx, pkt, pOut)

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we get a out packet

1. DecoderOut_t *pOut=NULL;

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ok  we get the output .how to use it?

the data of pOut contains :

1. VPU_FRAME *frame=(VPU_FRAME *)(pOut->data);

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both virtual and physical address of the decoded frame are contained in structure named VPU_FRAME,
if you want to use virtual address, make sure you have done VPUMemLink before.

1. VPUMemLink(&frame->vpumem);

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save the output data :

1. fwrite((U8*)(frame->vpumem.vir_addr), 1, frameSize, pOutFile);

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remember use VPUFreeLinear to free, otherwise memory leak will give you a surprise.

1. VPUFreeLinear(&frame->vpumem);

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done !

isle

In theory，It can work.
you could try。

isle

h265?
the libhevcdec.so is needed.