RELAND codec2: C2AllocatorIon/DmaBuf: add support for padding
Allocation sizes() should reflect the actual sizes used for the allocation.
Bug: 181380463
Change-Id: I00be700de99bfc7a58434874db1fa0731c83235f
diff --git a/media/codec2/vndk/C2AllocatorIon.cpp b/media/codec2/vndk/C2AllocatorIon.cpp
index 85623b8..a8528df 100644
--- a/media/codec2/vndk/C2AllocatorIon.cpp
+++ b/media/codec2/vndk/C2AllocatorIon.cpp
@@ -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 @@
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 @@
buffer = -1;
}
}
- return new Impl(ionFd, alignedSize, bufferFd, buffer, id, ret);
+ return new Impl(ionFd, allocSize, 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, allocSize, bufferFd, id, ret);
}
}