status_t VirtualDisplaySurface::prepareFrame(CompositionType compositionType) {
if (mDisplayId < 0)
return NO_ERROR;
VDS_LOGW_IF(mDbgState != DBG_STATE_BEGUN,
"Unexpected prepareFrame() in %s state", dbgStateStr());
mDbgState = DBG_STATE_PREPARED;
mCompositionType = compositionType;
if (sForceHwcCopy && mCompositionType == COMPOSITION_GLES) {
// Some hardware can do RGB->YUV conversion more efficiently in hardware
// controlled by HWC than in hardware controlled by the video encoder.
// Forcing GLES-composed frames to go through an extra copy by the HWC
// allows the format conversion to happen there, rather than passing RGB
// directly to the consumer.
//
// On the other hand, when the consumer prefers RGB or can consume RGB
// inexpensively, this forces an unnecessary copy.
mCompositionType = COMPOSITION_MIXED;
}
if (mCompositionType != mDbgLastCompositionType) {
VDS_LOGV("prepareFrame: composition type changed to %s",
dbgCompositionTypeStr(mCompositionType));
mDbgLastCompositionType = mCompositionType;
}
if (mCompositionType != COMPOSITION_GLES &&
(mOutputFormat != mDefaultOutputFormat ||
mOutputUsage != GRALLOC_USAGE_HW_COMPOSER)) {
// We must have just switched from GLES-only to MIXED or HWC
// composition. Stop using the format and usage requested by the GLES
// driver; they may be suboptimal when HWC is writing to the output
// buffer. For example, if the output is going to a video encoder, and
// HWC can write directly to YUV, some hardware can skip a
// memory-to-memory RGB-to-YUV conversion step.
//
// If we just switched *to* GLES-only mode, we'll change the
// format/usage and get a new buffer when the GLES driver calls
// dequeueBuffer().
mOutputFormat = mDefaultOutputFormat;
setOutputUsage(GRALLOC_USAGE_HW_COMPOSER);
refreshOutputBuffer();
}
return NO_ERROR;
}
status_t VirtualDisplaySurface::dequeueBuffer(int* pslot, sp<Fence>* fence, bool async,
uint32_t w, uint32_t h, PixelFormat format, uint32_t usage) {
if (mDisplayId < 0)
return mSource[SOURCE_SINK]->dequeueBuffer(pslot, fence, async, w, h, format, usage);
VDS_LOGW_IF(mDbgState != DBG_STATE_PREPARED,
"Unexpected dequeueBuffer() in %s state", dbgStateStr());
mDbgState = DBG_STATE_GLES;
VDS_LOGW_IF(!async, "EGL called dequeueBuffer with !async despite eglSwapInterval(0)");
VDS_LOGV("dequeueBuffer %dx%d fmt=%d usage=%#x", w, h, format, usage);
status_t result = NO_ERROR;
Source source = fbSourceForCompositionType(mCompositionType);
if (source == SOURCE_SINK) {
if (mOutputProducerSlot < 0) {
// Last chance bailout if something bad happened earlier. For example,
// in a GLES configuration, if the sink disappears then dequeueBuffer
// will fail, the GLES driver won't queue a buffer, but SurfaceFlinger
// will soldier on. So we end up here without a buffer. There should
// be lots of scary messages in the log just before this.
VDS_LOGE("dequeueBuffer: no buffer, bailing out");
return NO_MEMORY;
}
// We already dequeued the output buffer. If the GLES driver wants
// something incompatible, we have to cancel and get a new one. This
// will mean that HWC will see a different output buffer between
// prepare and set, but since we're in GLES-only mode already it
// shouldn't matter.
usage |= GRALLOC_USAGE_HW_COMPOSER;
const sp<GraphicBuffer>& buf = mProducerBuffers[mOutputProducerSlot];
if ((usage & ~buf->getUsage()) != 0 ||
(format != 0 && format != buf->getPixelFormat()) ||
(w != 0 && w != mSinkBufferWidth) ||
(h != 0 && h != mSinkBufferHeight)) {
VDS_LOGV("dequeueBuffer: dequeueing new output buffer: "
"want %dx%d fmt=%d use=%#x, "
"have %dx%d fmt=%d use=%#x",
w, h, format, usage,
mSinkBufferWidth, mSinkBufferHeight,
buf->getPixelFormat(), buf->getUsage());
mOutputFormat = format;
setOutputUsage(usage);
result = refreshOutputBuffer();
if (result < 0)
return result;
}
}
if (source == SOURCE_SINK) {
*pslot = mOutputProducerSlot;
*fence = mOutputFence;
} else {
int sslot;
result = dequeueBuffer(source, format, usage, &sslot, fence);
if (result >= 0) {
*pslot = mapSource2ProducerSlot(source, sslot);
}
}
return result;
}
VirtualDisplaySurface::VirtualDisplaySurface(HWComposer& hwc,
int32_t &hwcDisplayId,
const sp<IGraphicBufferProducer>& sink,
const sp<IGraphicBufferProducer>& bqProducer,
const sp<IGraphicBufferConsumer>& bqConsumer,
const String8& name,
bool secure)
: ConsumerBase(bqConsumer),
mHwc(hwc),
mDisplayId(NO_MEMORY),
mDisplayName(name),
mOutputUsage(GRALLOC_USAGE_HW_COMPOSER),
mProducerSlotSource(0),
mDbgState(DBG_STATE_IDLE),
mDbgLastCompositionType(COMPOSITION_UNKNOWN),
mMustRecompose(false),
mForceHwcCopy(false),
mSecure(false)
{
mSource[SOURCE_SINK] = sink;
mSource[SOURCE_SCRATCH] = bqProducer;
int sinkWidth, sinkHeight, sinkFormat, sinkUsage;
sink->query(NATIVE_WINDOW_WIDTH, &sinkWidth);
sink->query(NATIVE_WINDOW_HEIGHT, &sinkHeight);
sink->query(NATIVE_WINDOW_FORMAT, &sinkFormat);
sink->query(NATIVE_WINDOW_CONSUMER_USAGE_BITS, &sinkUsage);
mSinkBufferWidth = sinkWidth;
mSinkBufferHeight = sinkHeight;
// Pick the buffer format to request from the sink when not rendering to it
// with GLES. If the consumer needs CPU access, use the default format
// set by the consumer. Otherwise allow gralloc to decide the format based
// on usage bits.
mDefaultOutputFormat = sinkFormat;
if((sinkUsage & GRALLOC_USAGE_HW_VIDEO_ENCODER)
#ifdef QCOM_BSP
&& (sinkUsage & GRALLOC_USAGE_PRIVATE_WFD)
#endif
)
{
mDefaultOutputFormat = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
mForceHwcCopy = true;
//Set secure flag only if the session requires HW protection, currently
//there is no other way to distinguish different security protection levels
//This allows Level-3 sessions(eg.simulated displayes) to get
//buffers from IOMMU heap and not MM (secure) heap.
mSecure = secure;
}
// XXX: With this debug property we can allow screenrecord to be composed
// via HWC. This is useful for debugging purposes, for example when WFD
// is not working on a particular build.
char value[PROPERTY_VALUE_MAX];
if( (property_get("debug.hwc.screenrecord", value, NULL) > 0) &&
((!strncmp(value, "1", strlen("1"))) ||
!strncasecmp(value, "true", strlen("true")))) {
mForceHwcCopy = true;
}
// Once the mForceHwcCopy flag is set, we can freely allocate an HWC
// display ID.
if (mForceHwcCopy && mHwc.isVDSEnabled())
mDisplayId = mHwc.allocateDisplayId();
hwcDisplayId = mDisplayId; //update display id for device creation in SF
mOutputFormat = mDefaultOutputFormat;
// TODO: need to add the below logs as part of dumpsys output
VDS_LOGV("creation: sinkFormat: 0x%x sinkUsage: 0x%x mForceHwcCopy: %d",
mOutputFormat, sinkUsage, mForceHwcCopy);
setOutputUsage();
resetPerFrameState();
ConsumerBase::mName = String8::format("VDS: %s", mDisplayName.string());
mConsumer->setConsumerName(ConsumerBase::mName);
mConsumer->setConsumerUsageBits(GRALLOC_USAGE_HW_COMPOSER);
mConsumer->setDefaultBufferSize(sinkWidth, sinkHeight);
mConsumer->setDefaultMaxBufferCount(2);
}