Use physical memory for software rendering to take a fast path through surface flinger if possible.

#include "../include/SoftwareRenderer.h"

#include <binder/MemoryHeapBase.h>

#include <binder/MemoryHeapPmem.h>

#include <media/stagefright/MediaDebug.h>

#include <ui/ISurface.h>

      mDecodedWidth(decodedWidth),

      mDecodedHeight(decodedHeight),

      mFrameSize(mDecodedWidth * mDecodedHeight * 2),  // RGB565

      mMemoryHeap(new MemoryHeapBase(2 * mFrameSize)),

      mIndex(0) {

    // TODO: How do I allocate physical memory on Droid?

    mMemoryHeap = new MemoryHeapBase("/dev/pmem_adsp", 2 * mFrameSize);

    if (mMemoryHeap->heapID() < 0) {

        LOGI("Creating physical memory heap failed, reverting to regular heap.");

        mMemoryHeap = new MemoryHeapBase(2 * mFrameSize);

    } else {

        mMemoryHeap = new MemoryHeapPmem(mMemoryHeap);

    }

    CHECK(mISurface.get() != NULL);

    CHECK(mDecodedWidth > 0);

    CHECK(mDecodedHeight > 0);