Remap Y-values of YUV NV21 byte array into bitmap
I have a NV21 byte array (that I get from the camera), and I need to convert it to a black and white bitmap (so I only need the Y-values from the byte array). I tried doing it in Java, but that was VERY slow. So I did some research and I found Renderscript, but I do not know how to use it since the input-Allocation is not the same dimension as the output-Allocation. Does someone have suggestions to do it in Renderscript or does someone have another idea? Thanks in advance.
android performance renderscript asked Dec 28 '18 at 14:07
AntonAnton
166
add a comment |
I have a NV21 byte array (that I get from the camera), and I need to convert it to a black and white bitmap (so I only need the Y-values from the byte array). I tried doing it in Java, but that was VERY slow. So I did some research and I found Renderscript, but I do not know how to use it since the input-Allocation is not the same dimension as the output-Allocation. Does someone have suggestions to do it in Renderscript or does someone have another idea? Thanks in advance.
android performance renderscript asked Dec 28 '18 at 14:07
AntonAnton
166
add a comment |
I have a NV21 byte array (that I get from the camera), and I need to convert it to a black and white bitmap (so I only need the Y-values from the byte array). I tried doing it in Java, but that was VERY slow. So I did some research and I found Renderscript, but I do not know how to use it since the input-Allocation is not the same dimension as the output-Allocation. Does someone have suggestions to do it in Renderscript or does someone have another idea? Thanks in advance.
android performance renderscript asked Dec 28 '18 at 14:07
AntonAnton
166
I have a NV21 byte array (that I get from the camera), and I need to convert it to a black and white bitmap (so I only need the Y-values from the byte array). I tried doing it in Java, but that was VERY slow. So I did some research and I found Renderscript, but I do not know how to use it since the input-Allocation is not the same dimension as the output-Allocation. Does someone have suggestions to do it in Renderscript or does someone have another idea? Thanks in advance.
android performance renderscript android performance renderscript asked Dec 28 '18 at 14:07
AntonAnton
166
asked Dec 28 '18 at 14:07
AntonAnton
166
asked Dec 28 '18 at 14:07
AntonAnton
166
asked Dec 28 '18 at 14:07
AntonAnton
166
asked Dec 28 '18 at 14:07
AntonAnton
166
166
add a comment |
add a comment |
1 Answer
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I solved the problem of allocations of different sizes by binding only the output allocation and setting the input allocation from the Java code.
I found the solution in an answer on Stackoverflow, but I can't find the link now. But I posted a question few hours ago with a script with a similar structure.
Coding functions across multiple renderscripts to avoid duplications
The input allocation is defined as a property in the script
rs_allocation inputImg
It is set from java either by setting the surface to a buffer and calling:
inputAllocation.ioReceive()
Or by calling:
yourScript.setAllocationName(inputImage);
answered Jan 3 at 1:40
FluidCodeFluidCode
385
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1 Answer
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active
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I solved the problem of allocations of different sizes by binding only the output allocation and setting the input allocation from the Java code.
I found the solution in an answer on Stackoverflow, but I can't find the link now. But I posted a question few hours ago with a script with a similar structure.
Coding functions across multiple renderscripts to avoid duplications
The input allocation is defined as a property in the script
rs_allocation inputImg
It is set from java either by setting the surface to a buffer and calling:
inputAllocation.ioReceive()
Or by calling:
yourScript.setAllocationName(inputImage);
answered Jan 3 at 1:40
FluidCodeFluidCode
385
add a comment |
I solved the problem of allocations of different sizes by binding only the output allocation and setting the input allocation from the Java code.
I found the solution in an answer on Stackoverflow, but I can't find the link now. But I posted a question few hours ago with a script with a similar structure.
Coding functions across multiple renderscripts to avoid duplications
The input allocation is defined as a property in the script
rs_allocation inputImg
It is set from java either by setting the surface to a buffer and calling:
inputAllocation.ioReceive()
Or by calling:
yourScript.setAllocationName(inputImage);
answered Jan 3 at 1:40
FluidCodeFluidCode
385
add a comment |
I solved the problem of allocations of different sizes by binding only the output allocation and setting the input allocation from the Java code.
I found the solution in an answer on Stackoverflow, but I can't find the link now. But I posted a question few hours ago with a script with a similar structure.
Coding functions across multiple renderscripts to avoid duplications
The input allocation is defined as a property in the script
rs_allocation inputImg
It is set from java either by setting the surface to a buffer and calling:
inputAllocation.ioReceive()
Or by calling:
yourScript.setAllocationName(inputImage);
answered Jan 3 at 1:40
FluidCodeFluidCode
385
I solved the problem of allocations of different sizes by binding only the output allocation and setting the input allocation from the Java code.
I found the solution in an answer on Stackoverflow, but I can't find the link now. But I posted a question few hours ago with a script with a similar structure.
Coding functions across multiple renderscripts to avoid duplications
The input allocation is defined as a property in the script
rs_allocation inputImg
It is set from java either by setting the surface to a buffer and calling:
inputAllocation.ioReceive()
Or by calling:
yourScript.setAllocationName(inputImage);
answered Jan 3 at 1:40
FluidCodeFluidCode
385
answered Jan 3 at 1:40
FluidCodeFluidCode
385
answered Jan 3 at 1:40
FluidCodeFluidCode
385
answered Jan 3 at 1:40
FluidCodeFluidCode
385
385
add a comment |
add a comment |
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