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Tensor: Move general CPU/SSBO tensor storage into Ahwb-backed CPU/SSBO storage.

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PiperOrigin-RevId: 493710495
This commit is contained in:
Nikolay Chirkov 2022-12-07 14:31:02 -08:00 committed by Copybara-Service
parent ea74db86dd
commit 7faee517c4
2 changed files with 40 additions and 1 deletions
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1
mediapipe/framework/formats/tensor.h
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@ -418,6 +418,7 @@ class Tensor {
void ReleaseAhwbStuff();
void* MapAhwbToCpuRead() const;
void* MapAhwbToCpuWrite() const;
void MoveCpuOrSsboToAhwb() const;
#if MEDIAPIPE_OPENGL_ES_VERSION >= MEDIAPIPE_OPENGL_ES_30
mutable std::shared_ptr<mediapipe::GlContext> gl_context_;

40
mediapipe/framework/formats/tensor_ahwb.cc
View File

@ -215,10 +215,15 @@ Tensor::AHardwareBufferView Tensor::GetAHardwareBufferReadView() const {
CHECK(ahwb_ || !(valid_ & kValidOpenGlBuffer))
<< "Interoperability bettween OpenGL buffer and AHardwareBuffer is not "
"supported on targe system.";
bool transfer = !ahwb_;
CHECK(AllocateAHardwareBuffer())
<< "AHardwareBuffer is not supported on the target system.";
valid_ |= kValidAHardwareBuffer;
if (valid_ & kValidOpenGlBuffer) CreateEglSyncAndFd();
if (transfer) {
MoveCpuOrSsboToAhwb();
} else {
if (valid_ & kValidOpenGlBuffer) CreateEglSyncAndFd();
}
return {ahwb_,
ssbo_written_,
&fence_fd_, // The FD is created for SSBO -> AHWB synchronization.
@ -303,6 +308,39 @@ bool Tensor::AllocateAhwbMapToSsbo() const {
return false;
}
// Moves Cpu/Ssbo resource under the Ahwb backed memory.
void Tensor::MoveCpuOrSsboToAhwb() const {
void* dest = nullptr;
if (__builtin_available(android 26, *)) {
auto error = AHardwareBuffer_lock(
ahwb_, AHARDWAREBUFFER_USAGE_CPU_WRITE_RARELY, -1, nullptr, &dest);
CHECK(error == 0) << "AHardwareBuffer_lock " << error;
}
if (valid_ & kValidOpenGlBuffer) {
gl_context_->Run([this, dest]() {
glBindBuffer(GL_SHADER_STORAGE_BUFFER, opengl_buffer_);
const void* src = glMapBufferRange(GL_SHADER_STORAGE_BUFFER, 0, bytes(),
GL_MAP_READ_BIT);
std::memcpy(dest, src, bytes());
glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
glDeleteBuffers(1, &opengl_buffer_);
});
opengl_buffer_ = GL_INVALID_INDEX;
gl_context_ = nullptr;
} else if (valid_ & kValidCpu) {
std::memcpy(dest, cpu_buffer_, bytes());
// Free CPU memory because next time AHWB is mapped instead.
free(cpu_buffer_);
cpu_buffer_ = nullptr;
} else {
LOG(FATAL) << "Can't convert tensor with mask " << valid_ << " into AHWB.";
}
if (__builtin_available(android 26, *)) {
auto error = AHardwareBuffer_unlock(ahwb_, nullptr);
CHECK(error == 0) << "AHardwareBuffer_unlock " << error;
}
}
// SSBO is created on top of AHWB. A fence is inserted into the GPU queue before
// the GPU task that is going to read from the SSBO. When the writing into AHWB
// is finished then the GPU reads from the SSBO.