blob: 0c5a613746e6b09292e3a8b83f0d53628a0bd802 [file] [log] [blame]
/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string.h>
#include <pthread.h>
#include <limits.h>
#include <cutils/ashmem.h>
#include <unistd.h>
#include <errno.h>
#include <dlfcn.h>
#include <sys/mman.h>
#include "gralloc_cb.h"
#include "goldfish_dma.h"
#include "FormatConversions.h"
#include "HostConnection.h"
#include "ProcessPipe.h"
#include "glUtils.h"
#include <cutils/log.h>
#include <cutils/properties.h>
#include <set>
#include <string>
#include <sstream>
/* Set to 1 or 2 to enable debug traces */
#define DEBUG 0
#if DEBUG >= 1
# define D(...) ALOGD(__VA_ARGS__)
#else
# define D(...) ((void)0)
#endif
#if DEBUG >= 2
# define DD(...) ALOGD(__VA_ARGS__)
#else
# define DD(...) ((void)0)
#endif
#define DBG_FUNC DBG("%s\n", __FUNCTION__)
//
// our private gralloc module structure
//
struct private_module_t {
gralloc_module_t base;
};
/* If not NULL, this is a pointer to the fallback module.
* This really is gralloc.default, which we'll use if we detect
* that the emulator we're running in does not support GPU emulation.
*/
static gralloc_module_t* sFallback;
static pthread_once_t sFallbackOnce = PTHREAD_ONCE_INIT;
static void fallback_init(void); // forward
typedef struct _alloc_list_node {
buffer_handle_t handle;
_alloc_list_node *next;
_alloc_list_node *prev;
} AllocListNode;
struct MemRegionInfo {
void* ashmemBase;
mutable uint32_t refCount;
};
struct MemRegionInfoCmp {
bool operator()(const MemRegionInfo& a, const MemRegionInfo& b) const {
return a.ashmemBase < b.ashmemBase;
}
};
typedef std::set<MemRegionInfo, MemRegionInfoCmp> MemRegionSet;
typedef MemRegionSet::iterator mem_region_handle_t;
//
// Our gralloc device structure (alloc interface)
//
struct gralloc_device_t {
alloc_device_t device;
AllocListNode *allocListHead; // double linked list of allocated buffers
MemRegionSet ashmemRegions; // to track allocations of each ashmem region
pthread_mutex_t lock;
};
struct gralloc_memregions_t {
MemRegionSet ashmemRegions;
};
#define INITIAL_DMA_REGION_SIZE 4096
struct gralloc_dmaregion_t {
goldfish_dma_context goldfish_dma;
uint32_t sz;
uint32_t refcount;
pthread_mutex_t lock;
};
// global device instance
static gralloc_memregions_t* s_grdev = NULL;
static gralloc_dmaregion_t* s_grdma = NULL;
void init_gralloc_memregions() {
if (s_grdev) return;
s_grdev = new gralloc_memregions_t;
}
void init_gralloc_dmaregion() {
D("%s: call\n", __FUNCTION__);
if (s_grdma) return;
s_grdma = new gralloc_dmaregion_t;
s_grdma->sz = INITIAL_DMA_REGION_SIZE;
s_grdma->refcount = 0;
pthread_mutex_init(&s_grdma->lock, NULL);
pthread_mutex_lock(&s_grdma->lock);
goldfish_dma_create_region(s_grdma->sz, &s_grdma->goldfish_dma);
pthread_mutex_unlock(&s_grdma->lock);
}
void get_gralloc_dmaregion() {
if (!s_grdma) return;
pthread_mutex_lock(&s_grdma->lock);
s_grdma->refcount++;
D("%s: call. refcount: %u\n", __FUNCTION__, s_grdma->refcount);
pthread_mutex_unlock(&s_grdma->lock);
}
static void resize_gralloc_dmaregion_locked(uint32_t new_sz) {
if (!s_grdma) return;
if (s_grdma->goldfish_dma.mapped) {
goldfish_dma_unmap(&s_grdma->goldfish_dma);
}
close(s_grdma->goldfish_dma.fd);
goldfish_dma_create_region(new_sz, &s_grdma->goldfish_dma);
s_grdma->sz = new_sz;
}
bool put_gralloc_dmaregion() {
if (!s_grdma) return false;
pthread_mutex_lock(&s_grdma->lock);
D("%s: call. refcount before: %u\n", __FUNCTION__, s_grdma->refcount);
s_grdma->refcount--;
bool shouldDelete = !s_grdma->refcount;
if (shouldDelete) {
D("%s: should delete!\n", __FUNCTION__);
resize_gralloc_dmaregion_locked(INITIAL_DMA_REGION_SIZE);
D("%s: done\n", __FUNCTION__);
}
pthread_mutex_unlock(&s_grdma->lock);
D("%s: exit\n", __FUNCTION__);
return shouldDelete;
}
void gralloc_dmaregion_register_ashmem(uint32_t sz) {
if (!s_grdma) return;
pthread_mutex_lock(&s_grdma->lock);
D("%s: for sz %u, refcount %u", __FUNCTION__, sz, s_grdma->refcount);
uint32_t new_sz = std::max(s_grdma->sz, sz);
if (new_sz != s_grdma->sz) {
D("%s: change sz from %u to %u", __FUNCTION__, s_grdma->sz, sz);
resize_gralloc_dmaregion_locked(new_sz);
}
if (!s_grdma->goldfish_dma.mapped) {
goldfish_dma_map(&s_grdma->goldfish_dma);
}
pthread_mutex_unlock(&s_grdma->lock);
}
void get_mem_region(void* ashmemBase) {
init_gralloc_memregions();
D("%s: call for %p", __FUNCTION__, ashmemBase);
MemRegionInfo lookup;
lookup.ashmemBase = ashmemBase;
mem_region_handle_t handle = s_grdev->ashmemRegions.find(lookup);
if (handle == s_grdev->ashmemRegions.end()) {
MemRegionInfo newRegion;
newRegion.ashmemBase = ashmemBase;
newRegion.refCount = 1;
s_grdev->ashmemRegions.insert(newRegion);
} else {
handle->refCount++;
}
}
bool put_mem_region(void* ashmemBase) {
init_gralloc_memregions();
D("%s: call for %p", __FUNCTION__, ashmemBase);
MemRegionInfo lookup;
lookup.ashmemBase = ashmemBase;
mem_region_handle_t handle = s_grdev->ashmemRegions.find(lookup);
if (handle == s_grdev->ashmemRegions.end()) {
ALOGE("%s: error: tried to put nonexistent mem region!", __FUNCTION__);
return true;
} else {
handle->refCount--;
bool shouldRemove = !handle->refCount;
if (shouldRemove) {
s_grdev->ashmemRegions.erase(lookup);
}
return shouldRemove;
}
}
void dump_regions() {
init_gralloc_memregions();
mem_region_handle_t curr = s_grdev->ashmemRegions.begin();
std::stringstream res;
for (; curr != s_grdev->ashmemRegions.end(); curr++) {
res << "\tashmem base " << curr->ashmemBase << " refcount " << curr->refCount << "\n";
}
ALOGD("ashmem region dump [\n%s]", res.str().c_str());
}
#if DEBUG
#define GET_ASHMEM_REGION(cb) \
dump_regions(); \
get_mem_region((void*)cb->ashmemBase); \
dump_regions(); \
#define PUT_ASHMEM_REGION(cb) \
dump_regions(); \
bool SHOULD_UNMAP = put_mem_region((void*)cb->ashmemBase); \
dump_regions(); \
#else
#define GET_ASHMEM_REGION(cb) \
get_mem_region((void*)cb->ashmemBase); \
#define PUT_ASHMEM_REGION(cb) \
bool SHOULD_UNMAP = put_mem_region((void*)cb->ashmemBase); \
#endif
//
// Our framebuffer device structure
//
struct fb_device_t {
framebuffer_device_t device;
};
static int map_buffer(cb_handle_t *cb, void **vaddr)
{
if (cb->fd < 0 || cb->ashmemSize <= 0) {
return -EINVAL;
}
void *addr = mmap(0, cb->ashmemSize, PROT_READ | PROT_WRITE,
MAP_SHARED, cb->fd, 0);
if (addr == MAP_FAILED) {
ALOGE("%s: failed to map ashmem region!", __FUNCTION__);
return -errno;
}
cb->ashmemBase = intptr_t(addr);
cb->ashmemBasePid = getpid();
D("%s: %p mapped ashmem base %p size %d\n", __FUNCTION__,
cb, cb->ashmemBase, cb->ashmemSize);
*vaddr = addr;
return 0;
}
#define DEFINE_HOST_CONNECTION \
HostConnection *hostCon = HostConnection::get(); \
ExtendedRCEncoderContext *rcEnc = (hostCon ? hostCon->rcEncoder() : NULL)
#define DEFINE_AND_VALIDATE_HOST_CONNECTION \
HostConnection *hostCon = HostConnection::get(); \
if (!hostCon) { \
ALOGE("gralloc: Failed to get host connection\n"); \
return -EIO; \
} \
ExtendedRCEncoderContext *rcEnc = hostCon->rcEncoder(); \
if (!rcEnc) { \
ALOGE("gralloc: Failed to get renderControl encoder context\n"); \
return -EIO; \
}
#if PLATFORM_SDK_VERSION < 18
// On older APIs, just define it as a value no one is going to use.
#define HAL_PIXEL_FORMAT_YCbCr_420_888 0xFFFFFFFF
#endif
static void updateHostColorBuffer(cb_handle_t* cb,
bool doLocked,
char* pixels) {
D("%s: call. doLocked=%d", __FUNCTION__, doLocked);
DEFINE_HOST_CONNECTION;
int bpp = glUtilsPixelBitSize(cb->glFormat, cb->glType) >> 3;
int left = doLocked ? cb->lockedLeft : 0;
int top = doLocked ? cb->lockedTop : 0;
int width = doLocked ? cb->lockedWidth : cb->width;
int height = doLocked ? cb->lockedHeight : cb->height;
char* to_send = pixels;
uint32_t rgbSz = width * height * bpp;
uint32_t send_buffer_size = rgbSz;
bool is_rgb_format =
cb->frameworkFormat != HAL_PIXEL_FORMAT_YV12 &&
cb->frameworkFormat != HAL_PIXEL_FORMAT_YCbCr_420_888;
char* convertedBuf = NULL;
if ((doLocked && is_rgb_format) ||
(!s_grdma &&
(doLocked || !is_rgb_format))) {
convertedBuf = new char[rgbSz];
to_send = convertedBuf;
send_buffer_size = rgbSz;
}
if (doLocked && is_rgb_format) {
copy_rgb_buffer_from_unlocked(
to_send, pixels,
cb->width,
width, height, top, left, bpp);
}
if (s_grdma) {
if (cb->frameworkFormat == HAL_PIXEL_FORMAT_YV12) {
get_yv12_offsets(width, height, NULL, NULL,
&send_buffer_size);
}
if (cb->frameworkFormat == HAL_PIXEL_FORMAT_YCbCr_420_888) {
get_yuv420p_offsets(width, height, NULL, NULL,
&send_buffer_size);
}
rcEnc->bindDmaContext(&s_grdma->goldfish_dma);
D("%s: call. dma update with sz=%u", __FUNCTION__, send_buffer_size);
pthread_mutex_lock(&s_grdma->lock);
rcEnc->rcUpdateColorBufferDMA(rcEnc, cb->hostHandle,
left, top, width, height,
cb->glFormat, cb->glType,
to_send, send_buffer_size);
pthread_mutex_unlock(&s_grdma->lock);
} else {
if (cb->frameworkFormat == HAL_PIXEL_FORMAT_YV12) {
yv12_to_rgb888(to_send, pixels,
width, height, left, top,
left + width - 1, top + height - 1);
}
if (cb->frameworkFormat == HAL_PIXEL_FORMAT_YCbCr_420_888) {
yuv420p_to_rgb888(to_send, pixels,
width, height, left, top,
left + width - 1, top + height - 1);
}
rcEnc->rcUpdateColorBuffer(rcEnc, cb->hostHandle,
left, top, width, height,
cb->glFormat, cb->glType, to_send);
}
if (convertedBuf) delete [] convertedBuf;
}
#ifndef GL_RGBA16F
#define GL_RGBA16F 0x881A
#endif // GL_RGBA16F
#ifndef GL_UNSIGNED_INT_10_10_10_2
#define GL_UNSIGNED_INT_10_10_10_2 0x8DF6
#endif // GL_UNSIGNED_INT_10_10_10_2
#ifndef GL_HALF_FLOAT
#define GL_HALF_FLOAT 0x140B
#endif // GL_HALF_FLOAT
//
// gralloc device functions (alloc interface)
//
static int gralloc_alloc(alloc_device_t* dev,
int w, int h, int format, int usage,
buffer_handle_t* pHandle, int* pStride)
{
D("gralloc_alloc w=%d h=%d usage=0x%x format=0x%x\n", w, h, usage, format);
gralloc_device_t *grdev = (gralloc_device_t *)dev;
if (!grdev || !pHandle || !pStride) {
ALOGE("gralloc_alloc: Bad inputs (grdev: %p, pHandle: %p, pStride: %p",
grdev, pHandle, pStride);
return -EINVAL;
}
//
// Note: in screen capture mode, both sw_write and hw_write will be on
// and this is a valid usage
//
bool sw_write = (0 != (usage & GRALLOC_USAGE_SW_WRITE_MASK));
bool hw_write = (usage & GRALLOC_USAGE_HW_RENDER);
bool sw_read = (0 != (usage & GRALLOC_USAGE_SW_READ_MASK));
#if PLATFORM_SDK_VERSION >= 17
bool hw_cam_write = (usage & GRALLOC_USAGE_HW_CAMERA_WRITE);
bool hw_cam_read = (usage & GRALLOC_USAGE_HW_CAMERA_READ);
#else // PLATFORM_SDK_VERSION
bool hw_cam_write = false;
bool hw_cam_read = false;
#endif // PLATFORM_SDK_VERSION
#if PLATFORM_SDK_VERSION >= 15
bool hw_vid_enc_read = usage & GRALLOC_USAGE_HW_VIDEO_ENCODER;
#else // PLATFORM_SDK_VERSION
bool hw_vid_enc_read = false;
#endif // PLATFORM_SDK_VERSION
// Keep around original requested format for later validation
int frameworkFormat = format;
// Pick the right concrete pixel format given the endpoints as encoded in
// the usage bits. Every end-point pair needs explicit listing here.
#if PLATFORM_SDK_VERSION >= 17
if (format == HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED) {
// Camera as producer
if (usage & GRALLOC_USAGE_HW_CAMERA_WRITE) {
if (usage & GRALLOC_USAGE_HW_TEXTURE) {
// Camera-to-display is RGBA
format = HAL_PIXEL_FORMAT_RGBA_8888;
} else if (usage & GRALLOC_USAGE_HW_VIDEO_ENCODER) {
// Camera-to-encoder is NV21
format = HAL_PIXEL_FORMAT_YCrCb_420_SP;
} else if ((usage & GRALLOC_USAGE_HW_CAMERA_MASK) ==
GRALLOC_USAGE_HW_CAMERA_ZSL) {
// Camera-to-ZSL-queue is RGB_888
format = HAL_PIXEL_FORMAT_RGB_888;
}
}
if (format == HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED) {
ALOGE("gralloc_alloc: Requested auto format selection, "
"but no known format for this usage: %d x %d, usage %x",
w, h, usage);
return -EINVAL;
}
}
else if (format == HAL_PIXEL_FORMAT_YCbCr_420_888) {
ALOGW("gralloc_alloc: Requested YCbCr_420_888, taking experimental path. "
"usage: %d x %d, usage %x",
w, h, usage);
}
#endif // PLATFORM_SDK_VERSION >= 17
bool yuv_format = false;
int ashmem_size = 0;
int stride = w;
GLenum glFormat = 0;
GLenum glType = 0;
EmulatorFrameworkFormat selectedEmuFrameworkFormat = FRAMEWORK_FORMAT_GL_COMPATIBLE;
int bpp = 0;
int align = 1;
switch (format) {
case HAL_PIXEL_FORMAT_RGBA_8888:
case HAL_PIXEL_FORMAT_RGBX_8888:
case HAL_PIXEL_FORMAT_BGRA_8888:
bpp = 4;
glFormat = GL_RGBA;
glType = GL_UNSIGNED_BYTE;
break;
case HAL_PIXEL_FORMAT_RGB_888:
bpp = 3;
glFormat = GL_RGB;
glType = GL_UNSIGNED_BYTE;
break;
case HAL_PIXEL_FORMAT_RGB_565:
bpp = 2;
glFormat = GL_RGB;
glType = GL_UNSIGNED_SHORT_5_6_5;
break;
case HAL_PIXEL_FORMAT_RGBA_FP16:
bpp = 16;
glFormat = GL_RGBA16F;
glType = GL_HALF_FLOAT;
break;
case HAL_PIXEL_FORMAT_RGBA_1010102:
bpp = 4;
glFormat = GL_RGBA;
glType = GL_UNSIGNED_INT_10_10_10_2;
break;
#if PLATFORM_SDK_VERSION >= 21
case HAL_PIXEL_FORMAT_RAW16:
case HAL_PIXEL_FORMAT_Y16:
#elif PLATFORM_SDK_VERSION >= 16
case HAL_PIXEL_FORMAT_RAW_SENSOR:
#endif
bpp = 2;
align = 16*bpp;
if (! ((sw_read || hw_cam_read) && (sw_write || hw_cam_write) ) ) {
// Raw sensor data or Y16 only goes between camera and CPU
return -EINVAL;
}
// Not expecting to actually create any GL surfaces for this
glFormat = GL_LUMINANCE;
glType = GL_UNSIGNED_SHORT;
break;
#if PLATFORM_SDK_VERSION >= 17
case HAL_PIXEL_FORMAT_BLOB:
bpp = 1;
if (! (sw_read) ) {
// Blob data cannot be used by HW other than camera emulator
// But there is a CTS test trying to have access to it
// BUG: https://buganizer.corp.google.com/issues/37719518
return -EINVAL;
}
// Not expecting to actually create any GL surfaces for this
glFormat = GL_LUMINANCE;
glType = GL_UNSIGNED_BYTE;
break;
#endif // PLATFORM_SDK_VERSION >= 17
case HAL_PIXEL_FORMAT_YCrCb_420_SP:
align = 1;
bpp = 1; // per-channel bpp
yuv_format = true;
// Not expecting to actually create any GL surfaces for this
break;
case HAL_PIXEL_FORMAT_YV12:
align = 16;
bpp = 1; // per-channel bpp
yuv_format = true;
// We are going to use RGB888 on the host
glFormat = GL_RGB;
glType = GL_UNSIGNED_BYTE;
selectedEmuFrameworkFormat = FRAMEWORK_FORMAT_YV12;
break;
case HAL_PIXEL_FORMAT_YCbCr_420_888:
align = 1;
bpp = 1; // per-channel bpp
yuv_format = true;
// We are going to use RGB888 on the host
glFormat = GL_RGB;
glType = GL_UNSIGNED_BYTE;
selectedEmuFrameworkFormat = FRAMEWORK_FORMAT_YUV_420_888;
break;
default:
ALOGE("gralloc_alloc: Unknown format %d", format);
return -EINVAL;
}
if (usage & GRALLOC_USAGE_HW_FB) {
// keep space for postCounter
ashmem_size += sizeof(uint32_t);
}
if (sw_read || sw_write || hw_cam_write || hw_vid_enc_read) {
// keep space for image on guest memory if SW access is needed
// or if the camera is doing writing
if (yuv_format) {
size_t yStride = (w*bpp + (align - 1)) & ~(align-1);
size_t uvStride = (yStride / 2 + (align - 1)) & ~(align-1);
size_t uvHeight = h / 2;
ashmem_size += yStride * h + 2 * (uvHeight * uvStride);
stride = yStride / bpp;
} else {
size_t bpr = (w*bpp + (align-1)) & ~(align-1);
ashmem_size += (bpr * h);
stride = bpr / bpp;
}
}
D("gralloc_alloc format=%d, ashmem_size=%d, stride=%d, tid %d\n", format,
ashmem_size, stride, gettid());
//
// Allocate space in ashmem if needed
//
int fd = -1;
if (ashmem_size > 0) {
// round to page size;
ashmem_size = (ashmem_size + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
ALOGD("%s: Creating ashmem region of size %lu\n", __FUNCTION__, ashmem_size);
fd = ashmem_create_region("gralloc-buffer", ashmem_size);
if (fd < 0) {
ALOGE("gralloc_alloc failed to create ashmem region: %s\n",
strerror(errno));
return -errno;
}
}
cb_handle_t *cb = new cb_handle_t(fd, ashmem_size, usage,
w, h, frameworkFormat, format,
glFormat, glType, selectedEmuFrameworkFormat);
DEFINE_HOST_CONNECTION;
if (ashmem_size > 0) {
//
// map ashmem region if exist
//
void *vaddr;
int err = map_buffer(cb, &vaddr);
if (err) {
close(fd);
delete cb;
return err;
}
cb->setFd(fd);
if (rcEnc->getDmaVersion() > 0) {
D("%s: creating goldfish dma region of size %lu (cb fd %d)\n", __FUNCTION__, ashmem_size, cb->fd);
init_gralloc_dmaregion();
get_gralloc_dmaregion();
} else {
cb->goldfish_dma.fd = -1;
}
} else {
cb->goldfish_dma.fd = -1;
}
//
// Allocate ColorBuffer handle on the host (only if h/w access is allowed)
// Only do this for some h/w usages, not all.
// Also do this if we need to read from the surface, in this case the
// rendering will still happen on the host but we also need to be able to
// read back from the color buffer, which requires that there is a buffer
//
if (!yuv_format ||
frameworkFormat == HAL_PIXEL_FORMAT_YV12 ||
frameworkFormat == HAL_PIXEL_FORMAT_YCbCr_420_888) {
#if PLATFORM_SDK_VERSION >= 15
if (usage & (GRALLOC_USAGE_HW_TEXTURE | GRALLOC_USAGE_HW_RENDER |
GRALLOC_USAGE_HW_2D | GRALLOC_USAGE_HW_COMPOSER |
GRALLOC_USAGE_HW_VIDEO_ENCODER |
GRALLOC_USAGE_HW_FB | GRALLOC_USAGE_SW_READ_MASK) ) {
#else // PLATFORM_SDK_VERSION
if (usage & (GRALLOC_USAGE_HW_TEXTURE | GRALLOC_USAGE_HW_RENDER |
GRALLOC_USAGE_HW_2D |
GRALLOC_USAGE_HW_FB | GRALLOC_USAGE_SW_READ_MASK) ) {
#endif // PLATFORM_SDK_VERSION
if (hostCon && rcEnc) {
if (s_grdma) {
cb->hostHandle = rcEnc->rcCreateColorBufferDMA(rcEnc, w, h, glFormat, cb->emuFrameworkFormat);
} else {
cb->hostHandle = rcEnc->rcCreateColorBuffer(rcEnc, w, h, glFormat);
}
D("Created host ColorBuffer 0x%x\n", cb->hostHandle);
}
if (!cb->hostHandle) {
// Could not create colorbuffer on host !!!
close(fd);
delete cb;
ALOGD("%s: failed to create host cb! -EIO", __FUNCTION__);
return -EIO;
}
}
}
//
// alloc succeeded - insert the allocated handle to the allocated list
//
AllocListNode *node = new AllocListNode();
pthread_mutex_lock(&grdev->lock);
node->handle = cb;
node->next = grdev->allocListHead;
node->prev = NULL;
if (grdev->allocListHead) {
grdev->allocListHead->prev = node;
}
grdev->allocListHead = node;
pthread_mutex_unlock(&grdev->lock);
*pHandle = cb;
D("%s: alloc succeded, new ashmem base and size: %p %d handle: %p",
__FUNCTION__, cb->ashmemBase, cb->ashmemSize, cb);
switch (frameworkFormat) {
case HAL_PIXEL_FORMAT_YCbCr_420_888:
*pStride = 0;
break;
default:
*pStride = stride;
break;
}
return 0;
}
static int gralloc_free(alloc_device_t* dev,
buffer_handle_t handle)
{
cb_handle_t *cb = (cb_handle_t *)handle;
if (!cb_handle_t::validate((cb_handle_t*)cb)) {
ERR("gralloc_free: invalid handle");
return -EINVAL;
}
D("%s: for buf %p ptr %p size %d\n",
__FUNCTION__, handle, cb->ashmemBase, cb->ashmemSize);
if (cb->hostHandle) {
DEFINE_AND_VALIDATE_HOST_CONNECTION;
D("Closing host ColorBuffer 0x%x\n", cb->hostHandle);
rcEnc->rcCloseColorBuffer(rcEnc, cb->hostHandle);
}
//
// detach and unmap ashmem area if present
//
if (cb->fd > 0) {
if (cb->ashmemSize > 0 && cb->ashmemBase) {
D("%s: unmapped %p", __FUNCTION__, cb->ashmemBase);
munmap((void *)cb->ashmemBase, cb->ashmemSize);
put_gralloc_dmaregion();
}
close(cb->fd);
}
D("%s: done", __FUNCTION__);
// remove it from the allocated list
gralloc_device_t *grdev = (gralloc_device_t *)dev;
pthread_mutex_lock(&grdev->lock);
AllocListNode *n = grdev->allocListHead;
while( n && n->handle != cb ) {
n = n->next;
}
if (n) {
// buffer found on list - remove it from list
if (n->next) {
n->next->prev = n->prev;
}
if (n->prev) {
n->prev->next = n->next;
}
else {
grdev->allocListHead = n->next;
}
delete n;
}
pthread_mutex_unlock(&grdev->lock);
delete cb;
D("%s: exit", __FUNCTION__);
return 0;
}
static int gralloc_device_close(struct hw_device_t *dev)
{
gralloc_device_t* d = reinterpret_cast<gralloc_device_t*>(dev);
if (d) {
// free still allocated buffers
while( d->allocListHead != NULL ) {
gralloc_free(&d->device, d->allocListHead->handle);
}
// free device
free(d);
}
return 0;
}
static int fb_compositionComplete(struct framebuffer_device_t* dev)
{
(void)dev;
return 0;
}
//
// Framebuffer device functions
//
static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
{
fb_device_t *fbdev = (fb_device_t *)dev;
cb_handle_t *cb = (cb_handle_t *)buffer;
if (!fbdev || !cb_handle_t::validate(cb) || !cb->canBePosted()) {
return -EINVAL;
}
// Make sure we have host connection
DEFINE_AND_VALIDATE_HOST_CONNECTION;
// increment the post count of the buffer
intptr_t *postCountPtr = (intptr_t *)cb->ashmemBase;
if (!postCountPtr) {
// This should not happen
return -EINVAL;
}
(*postCountPtr)++;
// send post request to host
rcEnc->rcFBPost(rcEnc, cb->hostHandle);
hostCon->flush();
return 0;
}
static int fb_setUpdateRect(struct framebuffer_device_t* dev,
int l, int t, int w, int h)
{
fb_device_t *fbdev = (fb_device_t *)dev;
(void)l;
(void)t;
(void)w;
(void)h;
if (!fbdev) {
return -EINVAL;
}
// Make sure we have host connection
DEFINE_AND_VALIDATE_HOST_CONNECTION;
// send request to host
// TODO: XXX - should be implemented
//rcEnc->rc_XXX
return 0;
}
static int fb_setSwapInterval(struct framebuffer_device_t* dev,
int interval)
{
fb_device_t *fbdev = (fb_device_t *)dev;
if (!fbdev) {
return -EINVAL;
}
// Make sure we have host connection
DEFINE_AND_VALIDATE_HOST_CONNECTION;
// send request to host
rcEnc->rcFBSetSwapInterval(rcEnc, interval);
hostCon->flush();
return 0;
}
static int fb_close(struct hw_device_t *dev)
{
fb_device_t *fbdev = (fb_device_t *)dev;
delete fbdev;
return 0;
}
//
// gralloc module functions - refcount + locking interface
//
static int gralloc_register_buffer(gralloc_module_t const* module,
buffer_handle_t handle)
{
D("%s: start", __FUNCTION__);
pthread_once(&sFallbackOnce, fallback_init);
if (sFallback != NULL) {
return sFallback->registerBuffer(sFallback, handle);
}
D("gralloc_register_buffer(%p) called", handle);
private_module_t *gr = (private_module_t *)module;
cb_handle_t *cb = (cb_handle_t *)handle;
if (!gr || !cb_handle_t::validate(cb)) {
ERR("gralloc_register_buffer(%p): invalid buffer", cb);
return -EINVAL;
}
if (cb->hostHandle != 0) {
DEFINE_AND_VALIDATE_HOST_CONNECTION;
D("Opening host ColorBuffer 0x%x\n", cb->hostHandle);
rcEnc->rcOpenColorBuffer2(rcEnc, cb->hostHandle);
}
//
// if the color buffer has ashmem region and it is not mapped in this
// process map it now.
//
if (cb->ashmemSize > 0 && cb->mappedPid != getpid()) {
void *vaddr;
int err = map_buffer(cb, &vaddr);
if (err) {
ERR("gralloc_register_buffer(%p): map failed: %s", cb, strerror(-err));
return -err;
}
cb->mappedPid = getpid();
DEFINE_AND_VALIDATE_HOST_CONNECTION;
if (rcEnc->getDmaVersion() > 0) {
init_gralloc_dmaregion();
gralloc_dmaregion_register_ashmem(cb->ashmemSize);
}
}
if (cb->ashmemSize > 0) {
GET_ASHMEM_REGION(cb);
get_gralloc_dmaregion();
}
return 0;
}
static int gralloc_unregister_buffer(gralloc_module_t const* module,
buffer_handle_t handle)
{
if (sFallback != NULL) {
return sFallback->unregisterBuffer(sFallback, handle);
}
private_module_t *gr = (private_module_t *)module;
cb_handle_t *cb = (cb_handle_t *)handle;
if (!gr || !cb_handle_t::validate(cb)) {
ERR("gralloc_unregister_buffer(%p): invalid buffer", cb);
return -EINVAL;
}
if (cb->hostHandle) {
D("Closing host ColorBuffer 0x%x\n", cb->hostHandle);
DEFINE_AND_VALIDATE_HOST_CONNECTION;
rcEnc->rcCloseColorBuffer(rcEnc, cb->hostHandle);
}
//
// unmap ashmem region if it was previously mapped in this process
// (through register_buffer)
//
if (cb->ashmemSize > 0 && cb->mappedPid == getpid()) {
PUT_ASHMEM_REGION(cb);
put_gralloc_dmaregion();
if (!SHOULD_UNMAP) goto done;
DEFINE_AND_VALIDATE_HOST_CONNECTION;
void *vaddr;
int err = munmap((void *)cb->ashmemBase, cb->ashmemSize);
if (err) {
ERR("gralloc_unregister_buffer(%p): unmap failed", cb);
return -EINVAL;
}
cb->ashmemBase = 0;
cb->mappedPid = 0;
D("%s: Unregister buffer previous mapped to pid %d", __FUNCTION__, getpid());
}
done:
D("gralloc_unregister_buffer(%p) done\n", cb);
return 0;
}
static int gralloc_lock(gralloc_module_t const* module,
buffer_handle_t handle, int usage,
int l, int t, int w, int h,
void** vaddr)
{
if (sFallback != NULL) {
return sFallback->lock(sFallback, handle, usage, l, t, w, h, vaddr);
}
private_module_t *gr = (private_module_t *)module;
cb_handle_t *cb = (cb_handle_t *)handle;
if (!gr || !cb_handle_t::validate(cb)) {
ALOGE("gralloc_lock bad handle\n");
return -EINVAL;
}
// Validate usage,
// 1. cannot be locked for hw access
// 2. lock for either sw read or write.
// 3. locked sw access must match usage during alloc time.
bool sw_read = (0 != (usage & GRALLOC_USAGE_SW_READ_MASK));
bool sw_write = (0 != (usage & GRALLOC_USAGE_SW_WRITE_MASK));
bool hw_read = (usage & GRALLOC_USAGE_HW_TEXTURE);
bool hw_write = (usage & GRALLOC_USAGE_HW_RENDER);
#if PLATFORM_SDK_VERSION >= 17
bool hw_cam_write = (usage & GRALLOC_USAGE_HW_CAMERA_WRITE);
bool hw_cam_read = (usage & GRALLOC_USAGE_HW_CAMERA_READ);
#else // PLATFORM_SDK_VERSION
bool hw_cam_write = false;
bool hw_cam_read = false;
#endif // PLATFORM_SDK_VERSION
#if PLATFORM_SDK_VERSION >= 15
bool hw_vid_enc_read = (usage & GRALLOC_USAGE_HW_VIDEO_ENCODER);
#else // PLATFORM_SDK_VERSION
bool hw_vid_enc_read = false;
#endif // PLATFORM_SDK_VERSION
bool sw_read_allowed = (0 != (cb->usage & GRALLOC_USAGE_SW_READ_MASK));
#if PLATFORM_SDK_VERSION >= 15
// bug: 30088791
// a buffer was created for GRALLOC_USAGE_HW_VIDEO_ENCODER usage but
// later a software encoder is reading this buffer: this is actually
// legit usage.
sw_read_allowed = sw_read_allowed || (cb->usage & GRALLOC_USAGE_HW_VIDEO_ENCODER);
#endif // PLATFORM_SDK_VERSION >= 15
bool sw_write_allowed = (0 != (cb->usage & GRALLOC_USAGE_SW_WRITE_MASK));
if ( (hw_read || hw_write) ||
(!sw_read && !sw_write &&
!hw_cam_write && !hw_cam_read &&
!hw_vid_enc_read) ||
(sw_read && !sw_read_allowed) ||
(sw_write && !sw_write_allowed) ) {
ALOGE("gralloc_lock usage mismatch usage=0x%x cb->usage=0x%x\n", usage,
cb->usage);
//This is not exactly an error and loose it up.
//bug: 30784436
//return -EINVAL;
}
intptr_t postCount = 0;
void *cpu_addr = NULL;
//
// make sure ashmem area is mapped if needed
//
if (cb->canBePosted() || sw_read || sw_write ||
hw_cam_write || hw_cam_read ||
hw_vid_enc_read) {
if (cb->ashmemBasePid != getpid() || !cb->ashmemBase) {
return -EACCES;
}
if (cb->canBePosted()) {
postCount = *((intptr_t *)cb->ashmemBase);
cpu_addr = (void *)(cb->ashmemBase + sizeof(intptr_t));
}
else {
cpu_addr = (void *)(cb->ashmemBase);
}
}
if (cb->hostHandle) {
// Make sure we have host connection
DEFINE_AND_VALIDATE_HOST_CONNECTION;
//
// flush color buffer write cache on host and get its sync status.
//
int hostSyncStatus = rcEnc->rcColorBufferCacheFlush(rcEnc, cb->hostHandle,
postCount,
sw_read);
if (hostSyncStatus < 0) {
// host failed the color buffer sync - probably since it was already
// locked for write access. fail the lock.
ALOGE("gralloc_lock cacheFlush failed postCount=%d sw_read=%d\n",
postCount, sw_read);
return -EBUSY;
}
if (sw_read) {
void* rgb_addr = cpu_addr;
char* tmpBuf = 0;
if (cb->frameworkFormat == HAL_PIXEL_FORMAT_YV12 ||
cb->frameworkFormat == HAL_PIXEL_FORMAT_YCbCr_420_888) {
// We are using RGB888
tmpBuf = new char[cb->width * cb->height * 3];
rgb_addr = tmpBuf;
}
D("gralloc_lock read back color buffer %d %d ashmem base %p sz %d\n",
cb->width, cb->height, cb->ashmemBase, cb->ashmemSize);
rcEnc->rcReadColorBuffer(rcEnc, cb->hostHandle,
0, 0, cb->width, cb->height, cb->glFormat, cb->glType, rgb_addr);
if (tmpBuf) {
if (cb->frameworkFormat == HAL_PIXEL_FORMAT_YV12) {
rgb888_to_yv12((char*)cpu_addr, tmpBuf, cb->width, cb->height, l, t, l+w-1, t+h-1);
} else if (cb->frameworkFormat == HAL_PIXEL_FORMAT_YCbCr_420_888) {
rgb888_to_yuv420p((char*)cpu_addr, tmpBuf, cb->width, cb->height, l, t, l+w-1, t+h-1);
}
delete [] tmpBuf;
}
}
}
//
// is virtual address required ?
//
if (sw_read || sw_write || hw_cam_write || hw_cam_read || hw_vid_enc_read) {
*vaddr = cpu_addr;
}
if (sw_write || hw_cam_write) {
//
// Keep locked region if locked for s/w write access.
//
cb->lockedLeft = l;
cb->lockedTop = t;
cb->lockedWidth = w;
cb->lockedHeight = h;
}
DD("gralloc_lock success. vaddr: %p, *vaddr: %p, usage: %x, cpu_addr: %p",
vaddr, vaddr ? *vaddr : 0, usage, cpu_addr);
return 0;
}
static int gralloc_unlock(gralloc_module_t const* module,
buffer_handle_t handle)
{
if (sFallback != NULL) {
return sFallback->unlock(sFallback, handle);
}
private_module_t *gr = (private_module_t *)module;
cb_handle_t *cb = (cb_handle_t *)handle;
if (!gr || !cb_handle_t::validate(cb)) {
ALOGD("%s: invalid gr or cb handle. -EINVAL", __FUNCTION__);
return -EINVAL;
}
//
// if buffer was locked for s/w write, we need to update the host with
// the updated data
//
if (cb->hostHandle) {
// Make sure we have host connection
DEFINE_AND_VALIDATE_HOST_CONNECTION;
void *cpu_addr;
if (cb->canBePosted()) {
cpu_addr = (void *)(cb->ashmemBase + sizeof(int));
}
else {
cpu_addr = (void *)(cb->ashmemBase);
}
char* rgb_addr = (char *)cpu_addr;
if (cb->lockedWidth < cb->width || cb->lockedHeight < cb->height) {
updateHostColorBuffer(cb, true, rgb_addr);
}
else {
updateHostColorBuffer(cb, false, rgb_addr);
}
DD("gralloc_unlock success. cpu_addr: %p", cpu_addr);
}
cb->lockedWidth = cb->lockedHeight = 0;
return 0;
}
#if PLATFORM_SDK_VERSION >= 18
static int gralloc_lock_ycbcr(gralloc_module_t const* module,
buffer_handle_t handle, int usage,
int l, int t, int w, int h,
android_ycbcr *ycbcr)
{
// Not supporting fallback module for YCbCr
if (sFallback != NULL) {
ALOGD("%s: has fallback, return -EINVAL", __FUNCTION__);
return -EINVAL;
}
if (!ycbcr) {
ALOGE("%s: got NULL ycbcr struct! -EINVAL", __FUNCTION__);
return -EINVAL;
}
private_module_t *gr = (private_module_t *)module;
cb_handle_t *cb = (cb_handle_t *)handle;
if (!gr || !cb_handle_t::validate(cb)) {
ALOGE("%s: bad colorbuffer handle. -EINVAL", __FUNCTION__);
return -EINVAL;
}
if (cb->frameworkFormat != HAL_PIXEL_FORMAT_YV12 &&
cb->frameworkFormat != HAL_PIXEL_FORMAT_YCbCr_420_888) {
ALOGE("gralloc_lock_ycbcr can only be used with "
"HAL_PIXEL_FORMAT_YCbCr_420_888 or HAL_PIXEL_FORMAT_YV12, got %x instead. "
"-EINVAL",
cb->frameworkFormat);
return -EINVAL;
}
// Make sure memory is mapped, get address
if (cb->ashmemBasePid != getpid() || !cb->ashmemBase) {
ALOGD("%s: ashmembase not mapped. -EACCESS", __FUNCTION__);
return -EACCES;
}
uint8_t *cpu_addr = NULL;
if (cb->canBePosted()) {
cpu_addr = (uint8_t *)(cb->ashmemBase + sizeof(int));
}
else {
cpu_addr = (uint8_t *)(cb->ashmemBase);
}
// Calculate offsets to underlying YUV data
size_t yStride;
size_t cStride;
size_t cSize;
size_t yOffset;
size_t uOffset;
size_t vOffset;
size_t cStep;
size_t align;
switch (cb->format) {
case HAL_PIXEL_FORMAT_YCrCb_420_SP:
yStride = cb->width;
cStride = cb->width;
yOffset = 0;
vOffset = yStride * cb->height;
uOffset = vOffset + 1;
cStep = 2;
break;
case HAL_PIXEL_FORMAT_YV12:
// https://developer.android.com/reference/android/graphics/ImageFormat.html#YV12
align = 16;
yStride = (cb->width + (align -1)) & ~(align-1);
cStride = (yStride / 2 + (align - 1)) & ~(align-1);
yOffset = 0;
cSize = cStride * cb->height/2;
vOffset = yStride * cb->height;
uOffset = vOffset + cSize;
cStep = 1;
break;
case HAL_PIXEL_FORMAT_YCbCr_420_888:
align = 1;
yStride = cb->width;
cStride = yStride / 2;
yOffset = 0;
cSize = cStride * cb->height/2;
uOffset = yStride * cb->height;
vOffset = uOffset + cSize;
cStep = 1;
break;
default:
ALOGE("gralloc_lock_ycbcr unexpected internal format %x",
cb->format);
return -EINVAL;
}
ycbcr->y = cpu_addr + yOffset;
ycbcr->cb = cpu_addr + uOffset;
ycbcr->cr = cpu_addr + vOffset;
ycbcr->ystride = yStride;
ycbcr->cstride = cStride;
ycbcr->chroma_step = cStep;
// Zero out reserved fields
memset(ycbcr->reserved, 0, sizeof(ycbcr->reserved));
//
// Keep locked region if locked for s/w write access.
//
cb->lockedLeft = l;
cb->lockedTop = t;
cb->lockedWidth = w;
cb->lockedHeight = h;
DD("gralloc_lock_ycbcr success. usage: %x, ycbcr.y: %p, .cb: %p, .cr: %p, "
".ystride: %d , .cstride: %d, .chroma_step: %d", usage,
ycbcr->y, ycbcr->cb, ycbcr->cr, ycbcr->ystride, ycbcr->cstride,
ycbcr->chroma_step);
return 0;
}
#endif // PLATFORM_SDK_VERSION >= 18
static int gralloc_device_open(const hw_module_t* module,
const char* name,
hw_device_t** device)
{
int status = -EINVAL;
D("gralloc_device_open %s\n", name);
pthread_once( &sFallbackOnce, fallback_init );
if (sFallback != NULL) {
return sFallback->common.methods->open(&sFallback->common, name, device);
}
if (!strcmp(name, GRALLOC_HARDWARE_GPU0)) {
// Create host connection and keep it in the TLS.
// return error if connection with host can not be established
HostConnection *hostCon = HostConnection::get();
if (!hostCon) {
ALOGE("gralloc: failed to get host connection while opening %s\n", name);
return -EIO;
}
//
// Allocate memory for the gralloc device (alloc interface)
//
gralloc_device_t *dev;
dev = (gralloc_device_t*)malloc(sizeof(gralloc_device_t));
if (NULL == dev) {
return -ENOMEM;
}
memset(dev, 0, sizeof(gralloc_device_t));
// Initialize our device structure
//
dev->device.common.tag = HARDWARE_DEVICE_TAG;
dev->device.common.version = 0;
dev->device.common.module = const_cast<hw_module_t*>(module);
dev->device.common.close = gralloc_device_close;
dev->device.alloc = gralloc_alloc;
dev->device.free = gralloc_free;
dev->allocListHead = NULL;
pthread_mutex_init(&dev->lock, NULL);
*device = &dev->device.common;
status = 0;
}
else if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
// return error if connection with host can not be established
DEFINE_AND_VALIDATE_HOST_CONNECTION;
//
// Query the host for Framebuffer attributes
//
D("gralloc: query Frabuffer attribs\n");
EGLint width = rcEnc->rcGetFBParam(rcEnc, FB_WIDTH);
D("gralloc: width=%d\n", width);
EGLint height = rcEnc->rcGetFBParam(rcEnc, FB_HEIGHT);
D("gralloc: height=%d\n", height);
EGLint xdpi = rcEnc->rcGetFBParam(rcEnc, FB_XDPI);
D("gralloc: xdpi=%d\n", xdpi);
EGLint ydpi = rcEnc->rcGetFBParam(rcEnc, FB_YDPI);
D("gralloc: ydpi=%d\n", ydpi);
EGLint fps = rcEnc->rcGetFBParam(rcEnc, FB_FPS);
D("gralloc: fps=%d\n", fps);
EGLint min_si = rcEnc->rcGetFBParam(rcEnc, FB_MIN_SWAP_INTERVAL);
D("gralloc: min_swap=%d\n", min_si);
EGLint max_si = rcEnc->rcGetFBParam(rcEnc, FB_MAX_SWAP_INTERVAL);
D("gralloc: max_swap=%d\n", max_si);
//
// Allocate memory for the framebuffer device
//
fb_device_t *dev;
dev = (fb_device_t*)malloc(sizeof(fb_device_t));
if (NULL == dev) {
return -ENOMEM;
}
memset(dev, 0, sizeof(fb_device_t));
// Initialize our device structure
//
dev->device.common.tag = HARDWARE_DEVICE_TAG;
dev->device.common.version = 0;
dev->device.common.module = const_cast<hw_module_t*>(module);
dev->device.common.close = fb_close;
dev->device.setSwapInterval = fb_setSwapInterval;
dev->device.post = fb_post;
dev->device.setUpdateRect = 0; //fb_setUpdateRect;
dev->device.compositionComplete = fb_compositionComplete; //XXX: this is a dummy
const_cast<uint32_t&>(dev->device.flags) = 0;
const_cast<uint32_t&>(dev->device.width) = width;
const_cast<uint32_t&>(dev->device.height) = height;
const_cast<int&>(dev->device.stride) = width;
const_cast<int&>(dev->device.format) = HAL_PIXEL_FORMAT_RGBA_8888;
const_cast<float&>(dev->device.xdpi) = xdpi;
const_cast<float&>(dev->device.ydpi) = ydpi;
const_cast<float&>(dev->device.fps) = fps;
const_cast<int&>(dev->device.minSwapInterval) = min_si;
const_cast<int&>(dev->device.maxSwapInterval) = max_si;
*device = &dev->device.common;
status = 0;
}
return status;
}
//
// define the HMI symbol - our module interface
//
static struct hw_module_methods_t gralloc_module_methods = {
open: gralloc_device_open
};
struct private_module_t HAL_MODULE_INFO_SYM = {
base: {
common: {
tag: HARDWARE_MODULE_TAG,
#if PLATFORM_SDK_VERSION >= 18
module_api_version: GRALLOC_MODULE_API_VERSION_0_2,
hal_api_version: 0,
#elif PLATFORM_SDK_VERSION >= 16
module_api_version: 1,
hal_api_version: 0,
#else // PLATFORM_SDK_VERSION
version_major: 1,
version_minor: 0,
#endif // PLATFORM_SDK_VERSION
id: GRALLOC_HARDWARE_MODULE_ID,
name: "Graphics Memory Allocator Module",
author: "The Android Open Source Project",
methods: &gralloc_module_methods,
dso: NULL,
reserved: {0, }
},
registerBuffer: gralloc_register_buffer,
unregisterBuffer: gralloc_unregister_buffer,
lock: gralloc_lock,
unlock: gralloc_unlock,
perform: NULL,
#if PLATFORM_SDK_VERSION >= 18
lock_ycbcr: gralloc_lock_ycbcr,
#endif // PLATFORM_SDK_VERSION >= 18
}
};
/* This function is called once to detect whether the emulator supports
* GPU emulation (this is done by looking at the qemu.gles kernel
* parameter, which must be == 1 if this is the case).
*
* If not, then load gralloc.default instead as a fallback.
*/
static void
fallback_init(void)
{
char prop[PROPERTY_VALUE_MAX];
void* module;
// qemu.gles=0 -> no GLES 2.x support (only 1.x through software).
// qemu.gles=1 -> host-side GPU emulation through EmuGL
// qemu.gles=2 -> guest-side GPU emulation.
property_get("ro.kernel.qemu.gles", prop, "0");
if (atoi(prop) == 1) {
return;
}
ALOGD("Emulator without host-side GPU emulation detected.");
#if __LP64__
module = dlopen("/vendor/lib64/hw/gralloc.default.so", RTLD_LAZY|RTLD_LOCAL);
#else
module = dlopen("/vendor/lib/hw/gralloc.default.so", RTLD_LAZY|RTLD_LOCAL);
#endif
if (module != NULL) {
sFallback = reinterpret_cast<gralloc_module_t*>(dlsym(module, HAL_MODULE_INFO_SYM_AS_STR));
if (sFallback == NULL) {
dlclose(module);
}
}
if (sFallback == NULL) {
ALOGE("Could not find software fallback module!?");
}
}