Merge "codec2: C2AllocatorIon/DmaBuf: add support for padding" (5b1d365b) · Commits · e / os / android_frameworks_av

media/codec2/vndk/C2AllocatorIon.cpp

+32 −7

Original line number	Diff line number	Diff line
		@@ -30,10 +30,15 @@
		#include <C2ErrnoUtils.h>
		#include <C2HandleIonInternal.h>

		#include <android-base/properties.h>

		namespace android {

		namespace {
		constexpr size_t USAGE_LRU_CACHE_SIZE = 1024;

		// max padding after ion/dmabuf allocations in bytes
		constexpr uint32_t MAX_PADDING = 0x8000; // 32KB
		}

		/* size_t <=> int(lo), int(hi) conversions */
		@@ -376,14 +381,34 @@ C2AllocationIon::Impl *C2AllocationIon::Impl::Alloc(int ionFd, size_t size, size
		unsigned heapMask, unsigned flags, C2Allocator::id_t id) {
		int bufferFd = -1;
		ion_user_handle_t buffer = -1;
		size_t alignedSize = align == 0 ? size : (size + align - 1) & ~(align - 1);
		// NOTE: read this property directly from the property as this code has to run on
		// Android Q, but the sysprop was only introduced in Android S.
		static size_t sPadding =
		base::GetUintProperty("media.c2.dmabuf.padding", (uint32_t)0, MAX_PADDING);
		if (sPadding > SIZE_MAX - size) {
		ALOGD("ion_alloc: size %#zx cannot accommodate padding %#zx", size, sPadding);
		// use ImplV2 as there is no allocation anyways
		return new ImplV2(ionFd, size, -1, id, -ENOMEM);
		}

		size_t allocSize = size + sPadding;
		if (align) {
		if (align - 1 > SIZE_MAX - allocSize) {
		ALOGD("ion_alloc: size %#zx cannot accommodate padding %#zx and alignment %#zx",
		size, sPadding, align);
		// use ImplV2 as there is no allocation anyways
		return new ImplV2(ionFd, size, -1, id, -ENOMEM);
		}
		allocSize += align - 1;
		allocSize &= ~(align - 1);
		}
		int ret;

		if (ion_is_legacy(ionFd)) {
		ret = ion_alloc(ionFd, alignedSize, align, heapMask, flags, &buffer);
		ret = ion_alloc(ionFd, allocSize, align, heapMask, flags, &buffer);
		ALOGV("ion_alloc(ionFd = %d, size = %zu, align = %zu, prot = %d, flags = %d) "
		"returned (%d) ; buffer = %d",
		ionFd, alignedSize, align, heapMask, flags, ret, buffer);
		ionFd, allocSize, align, heapMask, flags, ret, buffer);
		if (ret == 0) {
		// get buffer fd for native handle constructor
		ret = ion_share(ionFd, buffer, &bufferFd);
		@@ -392,15 +417,15 @@ C2AllocationIon::Impl *C2AllocationIon::Impl::Alloc(int ionFd, size_t size, size
		buffer = -1;
		}
		}
		return new Impl(ionFd, alignedSize, bufferFd, buffer, id, ret);
		return new Impl(ionFd, size, bufferFd, buffer, id, ret);

		} else {
		ret = ion_alloc_fd(ionFd, alignedSize, align, heapMask, flags, &bufferFd);
		ret = ion_alloc_fd(ionFd, allocSize, align, heapMask, flags, &bufferFd);
		ALOGV("ion_alloc_fd(ionFd = %d, size = %zu, align = %zu, prot = %d, flags = %d) "
		"returned (%d) ; bufferFd = %d",
		ionFd, alignedSize, align, heapMask, flags, ret, bufferFd);
		ionFd, allocSize, align, heapMask, flags, ret, bufferFd);

		return new ImplV2(ionFd, alignedSize, bufferFd, id, ret);
		return new ImplV2(ionFd, size, bufferFd, id, ret);
		}
		}

media/codec2/vndk/C2DmaBufAllocator.cpp

+22 −5

Original line number	Diff line number	Diff line
		@@ -16,11 +16,13 @@

		//#define LOG_NDEBUG 0
		#define LOG_TAG "C2DmaBufAllocator"

		#include <BufferAllocator/BufferAllocator.h>
		#include <C2Buffer.h>
		#include <C2Debug.h>
		#include <C2DmaBufAllocator.h>
		#include <C2ErrnoUtils.h>

		#include <linux/ion.h>
		#include <sys/mman.h>
		#include <unistd.h> // getpagesize, size_t, close, dup
		@@ -28,14 +30,15 @@

		#include <list>

		#ifdef __ANDROID_APEX__
		#include <android-base/properties.h>
		#endif

		namespace android {

		namespace {
		constexpr size_t USAGE_LRU_CACHE_SIZE = 1024;

		// max padding after ion/dmabuf allocations in bytes
		constexpr uint32_t MAX_PADDING = 0x8000; // 32KB
		}

		/* =========================== BUFFER HANDLE =========================== */
		@@ -249,9 +252,23 @@ C2DmaBufAllocation::C2DmaBufAllocation(BufferAllocator& alloc, size_t size, C2St
		int bufferFd = -1;
		int ret = 0;

		bufferFd = alloc.Alloc(heap_name, size, flags);
		if (bufferFd < 0) ret = bufferFd;
		// NOTE: read this property directly from the property as this code has to run on
		// Android Q, but the sysprop was only introduced in Android S.
		static size_t sPadding =
		base::GetUintProperty("media.c2.dmabuf.padding", (uint32_t)0, MAX_PADDING);
		if (sPadding > SIZE_MAX - size) {
		// size would overflow
		ALOGD("dmabuf_alloc: size #%zx cannot accommodate padding #%zx", size, sPadding);
		ret = -ENOMEM;
		} else {
		size_t allocSize = size + sPadding;
		bufferFd = alloc.Alloc(heap_name, allocSize, flags);
		if (bufferFd < 0) {
		ret = bufferFd;
		}
		}

		// this may be a non-working handle if bufferFd is negative
		mHandle = C2HandleBuf(bufferFd, size);
		mId = id;
		mInit = c2_status_t(c2_map_errno<ENOMEM, EACCES, EINVAL>(ret));