replicant-frameworks_native/libs/gui/ISurfaceTexture.cpp
Jamie Gennis 8ba32fade1 Add the SurfaceTexture C++ implementation.
This change adds the C++ implementation of SurfaceTexture and related
classes. The goal of this is for a SurfaceTexture to be passed to
camera service or Stagefright in place of a Surface to allow camera
preview or decoded video frames to be streamed to an OpenGL ES texture
that an application can use.

Change-Id: I55c83a7017f1ecb81c9c9e3252cbd118b914296c
2011-01-06 13:20:47 -08:00

205 lines
6.6 KiB
C++

/*
* Copyright (C) 2010 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 <stdint.h>
#include <sys/types.h>
#include <utils/Errors.h>
#include <utils/RefBase.h>
#include <utils/Vector.h>
#include <utils/Timers.h>
#include <binder/Parcel.h>
#include <binder/IInterface.h>
#include <gui/ISurfaceTexture.h>
namespace android {
// ----------------------------------------------------------------------------
enum {
REQUEST_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
SET_BUFFER_COUNT,
DEQUEUE_BUFFER,
QUEUE_BUFFER,
CANCEL_BUFFER,
SET_CROP,
SET_TRANSFORM,
};
class BpSurfaceTexture : public BpInterface<ISurfaceTexture>
{
public:
BpSurfaceTexture(const sp<IBinder>& impl)
: BpInterface<ISurfaceTexture>(impl)
{
}
virtual sp<GraphicBuffer> requestBuffer(int bufferIdx,
uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
Parcel data, reply;
data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
data.writeInt32(bufferIdx);
data.writeInt32(w);
data.writeInt32(h);
data.writeInt32(format);
data.writeInt32(usage);
remote()->transact(REQUEST_BUFFER, data, &reply);
sp<GraphicBuffer> buffer;
bool nonNull = reply.readInt32();
if (nonNull) {
buffer = new GraphicBuffer();
reply.read(*buffer);
}
return buffer;
}
virtual status_t setBufferCount(int bufferCount)
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
data.writeInt32(bufferCount);
remote()->transact(SET_BUFFER_COUNT, data, &reply);
status_t err = reply.readInt32();
return err;
}
virtual status_t dequeueBuffer(int *buf) {
Parcel data, reply;
data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
remote()->transact(DEQUEUE_BUFFER, data, &reply);
*buf = reply.readInt32();
int result = reply.readInt32();
return result;
}
virtual status_t queueBuffer(int buf) {
Parcel data, reply;
data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
data.writeInt32(buf);
remote()->transact(QUEUE_BUFFER, data, &reply);
status_t result = reply.readInt32();
return result;
}
virtual void cancelBuffer(int buf) {
Parcel data, reply;
data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
data.writeInt32(buf);
remote()->transact(CANCEL_BUFFER, data, &reply);
}
virtual status_t setCrop(const Rect& reg) {
Parcel data, reply;
data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
data.writeFloat(reg.left);
data.writeFloat(reg.top);
data.writeFloat(reg.right);
data.writeFloat(reg.bottom);
remote()->transact(SET_CROP, data, &reply);
status_t result = reply.readInt32();
return result;
}
virtual status_t setTransform(uint32_t transform) {
Parcel data, reply;
data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
data.writeInt32(transform);
remote()->transact(SET_TRANSFORM, data, &reply);
status_t result = reply.readInt32();
return result;
}
};
IMPLEMENT_META_INTERFACE(SurfaceTexture, "android.gui.SurfaceTexture");
// ----------------------------------------------------------------------
status_t BnSurfaceTexture::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
switch(code) {
case REQUEST_BUFFER: {
CHECK_INTERFACE(ISurfaceTexture, data, reply);
int bufferIdx = data.readInt32();
uint32_t w = data.readInt32();
uint32_t h = data.readInt32();
uint32_t format = data.readInt32();
uint32_t usage = data.readInt32();
sp<GraphicBuffer> buffer(requestBuffer(bufferIdx, w, h, format,
usage));
reply->writeInt32(buffer != 0);
if (buffer != 0) {
reply->write(*buffer);
}
return NO_ERROR;
} break;
case SET_BUFFER_COUNT: {
CHECK_INTERFACE(ISurfaceTexture, data, reply);
int bufferCount = data.readInt32();
int result = setBufferCount(bufferCount);
reply->writeInt32(result);
return NO_ERROR;
} break;
case DEQUEUE_BUFFER: {
CHECK_INTERFACE(ISurfaceTexture, data, reply);
int buf;
int result = dequeueBuffer(&buf);
reply->writeInt32(buf);
reply->writeInt32(result);
return NO_ERROR;
} break;
case QUEUE_BUFFER: {
CHECK_INTERFACE(ISurfaceTexture, data, reply);
int buf = data.readInt32();
status_t result = queueBuffer(buf);
reply->writeInt32(result);
return NO_ERROR;
} break;
case CANCEL_BUFFER: {
CHECK_INTERFACE(ISurfaceTexture, data, reply);
int buf = data.readInt32();
cancelBuffer(buf);
return NO_ERROR;
} break;
case SET_CROP: {
Rect reg;
CHECK_INTERFACE(ISurfaceTexture, data, reply);
reg.left = data.readFloat();
reg.top = data.readFloat();
reg.right = data.readFloat();
reg.bottom = data.readFloat();
status_t result = setCrop(reg);
reply->writeInt32(result);
return NO_ERROR;
} break;
case SET_TRANSFORM: {
Rect reg;
CHECK_INTERFACE(ISurfaceTexture, data, reply);
uint32_t transform = data.readInt32();
status_t result = setTransform(transform);
reply->writeInt32(result);
return NO_ERROR;
} break;
}
return BBinder::onTransact(code, data, reply, flags);
}
// ----------------------------------------------------------------------------
}; // namespace android