diff -r cfcbf08528c4 -r 2b40d63a9c3d qtmobility/plugins/multimedia/gstreamer/qgstxvimagebuffer.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/qtmobility/plugins/multimedia/gstreamer/qgstxvimagebuffer.cpp Fri Apr 16 15:51:22 2010 +0300 @@ -0,0 +1,276 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include +#include +#include +#include + +#include "qgstxvimagebuffer.h" +#include "qvideosurfacegstsink.h" + +GstBufferClass *QGstXvImageBuffer::parent_class = NULL; + +GType QGstXvImageBuffer::get_type(void) +{ + static GType buffer_type = 0; + + if (buffer_type == 0) { + static const GTypeInfo buffer_info = { + sizeof (GstBufferClass), + NULL, + NULL, + QGstXvImageBuffer::class_init, + NULL, + NULL, + sizeof(QGstXvImageBuffer), + 0, + (GInstanceInitFunc)QGstXvImageBuffer::buffer_init, + NULL + }; + buffer_type = g_type_register_static(GST_TYPE_BUFFER, + "QGstXvImageBuffer", &buffer_info, GTypeFlags(0)); + } + return buffer_type; +} + +void QGstXvImageBuffer::class_init(gpointer g_class, gpointer class_data) +{ + Q_UNUSED(class_data); + GST_MINI_OBJECT_CLASS(g_class)->finalize = + (GstMiniObjectFinalizeFunction)buffer_finalize; + parent_class = (GstBufferClass*)g_type_class_peek_parent(g_class); +} + +void QGstXvImageBuffer::buffer_init(QGstXvImageBuffer *xvImage, gpointer g_class) +{ + Q_UNUSED(g_class); + xvImage->pool = 0; + xvImage->shmInfo.shmaddr = ((char *) -1); + xvImage->shmInfo.shmid = -1; + xvImage->markedForDeletion = false; +} + +void QGstXvImageBuffer::buffer_finalize(QGstXvImageBuffer * xvImage) +{ + if (xvImage->pool) { + if (xvImage->markedForDeletion) + xvImage->pool->destroyBuffer(xvImage); + else + xvImage->pool->recycleBuffer(xvImage); + } +} + + +QGstXvImageBufferPool::QGstXvImageBufferPool(QObject *parent) + :QObject(parent) +{ +} + +QGstXvImageBufferPool::~QGstXvImageBufferPool() +{ +} + +bool QGstXvImageBufferPool::isFormatSupported(const QVideoSurfaceFormat &surfaceFormat) +{ + bool ok = true; + surfaceFormat.property("portId").toULongLong(&ok); + if (!ok) + return false; + + int xvFormatId = surfaceFormat.property("xvFormatId").toInt(&ok); + if (!ok || xvFormatId < 0) + return false; + + int dataSize = surfaceFormat.property("dataSize").toInt(&ok); + if (!ok || dataSize<=0) + return false; + + return true; +} + +QGstXvImageBuffer *QGstXvImageBufferPool::takeBuffer(const QVideoSurfaceFormat &format, GstCaps *caps) +{ + m_poolMutex.lock(); + + m_caps = caps; + if (format != m_format) { + doClear(); + m_format = format; + } + + + if (m_pool.isEmpty()) { + //qDebug() << "QGstXvImageBufferPool::takeBuffer: no buffer available, allocate the new one"; + if (QThread::currentThread() == thread()) { + m_poolMutex.unlock(); + queuedAlloc(); + m_poolMutex.lock(); + } else { + QMetaObject::invokeMethod(this, "queuedAlloc", Qt::QueuedConnection); + m_allocWaitCondition.wait(&m_poolMutex, 300); + } + } + QGstXvImageBuffer *res = 0; + + if (!m_pool.isEmpty()) { + res = m_pool.takeLast(); + } + + m_poolMutex.unlock(); + + return res; +} + +void QGstXvImageBufferPool::queuedAlloc() +{ + QMutexLocker lock(&m_poolMutex); + + Q_ASSERT(QThread::currentThread() == thread()); + + QGstXvImageBuffer *xvBuffer = (QGstXvImageBuffer *)gst_mini_object_new(QGstXvImageBuffer::get_type()); + + quint64 portId = m_format.property("portId").toULongLong(); + int xvFormatId = m_format.property("xvFormatId").toInt(); + + xvBuffer->xvImage = XvShmCreateImage( + QX11Info::display(), + portId, + xvFormatId, + 0, + m_format.frameWidth(), + m_format.frameHeight(), + &xvBuffer->shmInfo + ); + + if (!xvBuffer->xvImage) { + //qDebug() << "QGstXvImageBufferPool: XvShmCreateImage failed"; + m_allocWaitCondition.wakeOne(); + return; + } + + xvBuffer->shmInfo.shmid = shmget(IPC_PRIVATE, xvBuffer->xvImage->data_size, IPC_CREAT | 0777); + xvBuffer->shmInfo.shmaddr = xvBuffer->xvImage->data = (char*)shmat(xvBuffer->shmInfo.shmid, 0, 0); + xvBuffer->shmInfo.readOnly = False; + + if (!XShmAttach(QX11Info::display(), &xvBuffer->shmInfo)) { + //qDebug() << "QGstXvImageBufferPool: XShmAttach failed"; + m_allocWaitCondition.wakeOne(); + return; + } + + shmctl (xvBuffer->shmInfo.shmid, IPC_RMID, NULL); + + xvBuffer->pool = this; + GST_MINI_OBJECT_CAST(xvBuffer)->flags = 0; + gst_buffer_set_caps(GST_BUFFER_CAST(xvBuffer), m_caps); + GST_BUFFER_DATA(xvBuffer) = (uchar*)xvBuffer->xvImage->data; + GST_BUFFER_SIZE(xvBuffer) = xvBuffer->xvImage->data_size; + + m_allBuffers.append(xvBuffer); + m_pool.append(xvBuffer); + + m_allocWaitCondition.wakeOne(); +} + + +void QGstXvImageBufferPool::clear() +{ + QMutexLocker lock(&m_poolMutex); + doClear(); +} + +void QGstXvImageBufferPool::doClear() +{ + foreach (QGstXvImageBuffer *xvBuffer, m_allBuffers) { + xvBuffer->markedForDeletion = true; + } + m_allBuffers.clear(); + + foreach (QGstXvImageBuffer *xvBuffer, m_pool) { + gst_buffer_unref(GST_BUFFER(xvBuffer)); + } + m_pool.clear(); + + m_format = QVideoSurfaceFormat(); +} + +void QGstXvImageBufferPool::queuedDestroy() +{ + QMutexLocker lock(&m_destroyMutex); + + foreach(XvShmImage xvImage, m_imagesToDestroy) { + if (xvImage.shmInfo.shmaddr != ((void *) -1)) { + XShmDetach(QX11Info::display(), &xvImage.shmInfo); + XSync(QX11Info::display(), false); + + shmdt(xvImage.shmInfo.shmaddr); + } + + if (xvImage.xvImage) + XFree(xvImage.xvImage); + } + + m_imagesToDestroy.clear(); + + XSync(QX11Info::display(), false); +} + +void QGstXvImageBufferPool::recycleBuffer(QGstXvImageBuffer *xvBuffer) +{ + QMutexLocker lock(&m_poolMutex); + gst_buffer_ref(GST_BUFFER_CAST(xvBuffer)); + m_pool.append(xvBuffer); +} + +void QGstXvImageBufferPool::destroyBuffer(QGstXvImageBuffer *xvBuffer) +{ + XvShmImage imageToDestroy; + imageToDestroy.xvImage = xvBuffer->xvImage; + imageToDestroy.shmInfo = xvBuffer->shmInfo; + + m_destroyMutex.lock(); + m_imagesToDestroy.append(imageToDestroy); + m_destroyMutex.unlock(); + + if (m_imagesToDestroy.size() == 1) + QMetaObject::invokeMethod(this, "queuedDestroy", Qt::QueuedConnection); +}