1 files changed, 143 insertions, 0 deletions
diff --git a/src/3rdparty/phonon/gstreamer/audiodataoutput.cpp b/src/3rdparty/phonon/gstreamer/audiodataoutput.cpp
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+++ b/src/3rdparty/phonon/gstreamer/audiodataoutput.cpp
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+/*  This file is part of the KDE project
+    Copyright (C) 2006 Matthias Kretz <kretz@kde.org>
+    Copyright (C) 2009 Martin Sandsmark <sandsmark@samfundet.no>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) version 3, or any
+    later version accepted by the membership of KDE e.V. (or its
+    successor approved by the membership of KDE e.V.), Nokia Corporation
+    (or its successors, if any) and the KDE Free Qt Foundation, which shall
+    act as a proxy defined in Section 6 of version 3 of the license.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "audiodataoutput.h"
+#include "gsthelper.h"
+#include "medianode.h"
+#include "mediaobject.h"
+#include <QtCore/QVector>
+#include <QtCore/QMap>
+#include <phonon/audiooutput.h>
+
+namespace Phonon
+{
+namespace Gstreamer
+{
+AudioDataOutput::AudioDataOutput(Backend *backend, QObject *parent)
+    : QObject(parent),
+    MediaNode(backend, AudioSink | AudioSource)
+{
+    static int count = 0;
+    m_name = "AudioDataOutput" + QString::number(count++);
+
+    m_queue = gst_element_factory_make ("identity", NULL);
+    gst_object_ref(m_queue);
+    m_isValid = true;
+}
+
+AudioDataOutput::~AudioDataOutput()
+{
+    gst_element_set_state(m_queue, GST_STATE_NULL);
+    gst_object_unref(m_queue);
+}
+
+int AudioDataOutput::dataSize() const
+{
+    return m_dataSize;
+}
+
+int AudioDataOutput::sampleRate() const
+{
+    return 44100;
+}
+
+void AudioDataOutput::setDataSize(int size)
+{
+    m_dataSize = size;
+}
+
+typedef QMap<Phonon::AudioDataOutput::Channel, QVector<float> > FloatMap;
+typedef QMap<Phonon::AudioDataOutput::Channel, QVector<qint16> > IntMap;
+
+inline void AudioDataOutput::convertAndEmit(const QVector<qint16> &leftBuffer, const QVector<qint16> &rightBuffer)
+{
+    //TODO: Floats
+    IntMap map;
+    map.insert(Phonon::AudioDataOutput::LeftChannel, leftBuffer);
+    map.insert(Phonon::AudioDataOutput::RightChannel, rightBuffer);
+    emit dataReady(map);
+}
+
+void AudioDataOutput::processBuffer(GstPad*, GstBuffer* buffer, gpointer gThat)
+{
+    // TODO emit endOfMedia
+    AudioDataOutput *that = reinterpret_cast<AudioDataOutput*>(gThat);
+
+    // determine the number of channels
+    GstStructure* structure = gst_caps_get_structure (GST_BUFFER_CAPS(buffer), 0);
+    gst_structure_get_int (structure, "channels", &that->m_channels);
+
+    if (that->m_channels > 2 || that->m_channels < 0) {
+        qWarning() << Q_FUNC_INFO << ": Number of channels not supported: " << that->m_channels;
+        return;
+    }
+
+    gint16 *data = reinterpret_cast<gint16*>(GST_BUFFER_DATA(buffer));
+    guint size = GST_BUFFER_SIZE(buffer) / sizeof(gint16);
+
+    that->m_pendingData.reserve(that->m_pendingData.size() + size);
+
+    for (uint i=0; i<size; i++) {
+        // 8 bit? interleaved? yay for lacking documentation!
+        that->m_pendingData.append(data[i]);
+    }
+
+    while (that->m_pendingData.size() > that->m_dataSize * that->m_channels) {
+        if (that->m_channels == 1) {
+            QVector<qint16> intBuffer(that->m_dataSize);
+            memcpy(intBuffer.data(), that->m_pendingData.constData(), that->m_dataSize * sizeof(qint16));
+
+            that->convertAndEmit(intBuffer, intBuffer);
+            int newSize = that->m_pendingData.size() - that->m_dataSize;
+            memmove(that->m_pendingData.data(), that->m_pendingData.constData() + that->m_dataSize, newSize * sizeof(qint16));
+            that->m_pendingData.resize(newSize);
+        } else {
+            QVector<qint16> left(that->m_dataSize), right(that->m_dataSize);
+            for (int i=0; i<that->m_dataSize; i++) {
+                left[i] = that->m_pendingData[i*2];
+                right[i] = that->m_pendingData[i*2+1];
+            }
+            that->m_pendingData.resize(that->m_pendingData.size() - that->m_dataSize*2);
+            that->convertAndEmit(left, right);
+        }
+    }
+}
+
+void AudioDataOutput::mediaNodeEvent(const MediaNodeEvent *event)
+{
+    if (event->type() == MediaNodeEvent::MediaObjectConnected && root()) {
+        g_object_set(G_OBJECT(audioElement()), "sync", true, (const char*)NULL);
+        GstPad *audiopad = gst_element_get_pad (audioElement(), "src");
+        gst_pad_add_buffer_probe (audiopad, G_CALLBACK(processBuffer), this);
+        gst_object_unref (audiopad);
+        return;
+    }
+
+    MediaNode::mediaNodeEvent(event);
+}
+
+}} //namespace Phonon::Gstreamer
+
+#include "moc_audiodataoutput.cpp"
+// vim: sw=4 ts=4
+