/* rtp_player_dialog.cpp
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "rtp_player_dialog.h"
#include <ui_rtp_player_dialog.h>

#ifdef QT_MULTIMEDIA_LIB

#include <epan/dissectors/packet-rtp.h>

#include <wsutil/utf8_entities.h>

#include "color_utils.h"
#include "qcustomplot.h"
#include "qt_ui_utils.h"
#include "rtp_audio_stream.h"
#include "tango_colors.h"

#include <QAudio>
#include <QAudioDeviceInfo>
#include <QFrame>
#include <QMenu>
#include <QVBoxLayout>

Q_DECLARE_METATYPE(RtpAudioStream *)
Q_DECLARE_METATYPE(QCPGraph *)

#endif // QT_MULTIMEDIA_LIB

#include <QPushButton>

#include "stock_icon.h"
#include "wireshark_application.h"

// To do:
// - Fully implement shorcuts (drag, go to packet, etc.)
// - Figure out selection and highlighting.
// - Make streams checkable.
// - Add silence, drop & jitter indicators to the graph.
// - How to handle multiple channels?
// - Threaded decoding?
// - Play MP3s. As per Zawinski's Law we already read emails.
// - RTP audio streams are currently keyed on src addr + src port + dst addr
//   + dst port + ssrc. This means that we can have multiple rtp_stream_info
//   structs per RtpAudioStream. Should we make them 1:1 instead?

// Current and former RTP player bugs. Many have attachments that can be usef for testing.
// Bug 3368 - The timestamp line in a RTP or RTCP packet display's "Not Representable"
// Bug 3952 - VoIP Call RTP Player: audio played is corrupted when RFC2833 packets are present
// Bug 4960 - RTP Player: Audio and visual feedback get rapidly out of sync
// Bug 5527 - Adding arbitrary value to x-axis RTP player
// Bug 7935 - Wrong Timestamps in RTP Player-Decode
// Bug 8007 - UI gets confused on playing decoded audio in rtp_player
// Bug 9007 - Switching SSRC values in RTP stream
// Bug 10613 - RTP audio player crashes
// Bug 11125 - RTP Player does not show progress in selected stream in Window 7
// Bug 11409 - Wireshark crashes when using RTP player
// Bug 12166 - RTP audio player crashes

// XXX It looks like we duplicate some functionality here and in the RTP
// analysis code, which has its own routines for writing audio data to a
// file.

// In some places we match by conv/call number, in others we match by first frame.

enum {
    src_addr_col_,
    src_port_col_,
    dst_addr_col_,
    dst_port_col_,
    ssrc_col_,
    first_pkt_col_,
    num_pkts_col_,
    time_span_col_,
    sample_rate_col_,
    payload_col_,

    stream_data_col_ = src_addr_col_, // RtpAudioStream
    graph_data_col_ = src_port_col_ // QCPGraph
};

#ifdef QT_MULTIMEDIA_LIB
static const double wf_graph_normal_width_ = 0.5;
static const double wf_graph_selected_width_ = 2.0;
#endif

RtpPlayerDialog::RtpPlayerDialog(QWidget &parent, CaptureFile &cf) :
    WiresharkDialog(parent, cf)
#ifdef QT_MULTIMEDIA_LIB
    , ui(new Ui::RtpPlayerDialog)
    , start_rel_time_(0.0)
#endif // QT_MULTIMEDIA_LIB
{
    ui->setupUi(this);
    setWindowTitle(wsApp->windowTitleString(tr("RTP Player")));
    loadGeometry(parent.width(), parent.height());

#ifdef QT_MULTIMEDIA_LIB
    ui->splitter->setStretchFactor(0, 3);
    ui->splitter->setStretchFactor(1, 1);

    ctx_menu_ = new QMenu(this);

    ctx_menu_->addAction(ui->actionZoomIn);
    ctx_menu_->addAction(ui->actionZoomOut);
    ctx_menu_->addAction(ui->actionReset);
    ctx_menu_->addSeparator();
    ctx_menu_->addAction(ui->actionMoveRight10);
    ctx_menu_->addAction(ui->actionMoveLeft10);
    ctx_menu_->addAction(ui->actionMoveRight1);
    ctx_menu_->addAction(ui->actionMoveLeft1);
    ctx_menu_->addSeparator();
    ctx_menu_->addAction(ui->actionGoToPacket);
    ctx_menu_->addSeparator();
    ctx_menu_->addAction(ui->actionDragZoom);
    ctx_menu_->addAction(ui->actionToggleTimeOrigin);
    ctx_menu_->addAction(ui->actionCrosshairs);

    connect(ui->audioPlot, SIGNAL(mouseMove(QMouseEvent*)),
            this, SLOT(updateHintLabel()));
    connect(ui->audioPlot, SIGNAL(mousePress(QMouseEvent*)),
            this, SLOT(graphClicked(QMouseEvent*)));

    cur_play_pos_ = new QCPItemStraightLine(ui->audioPlot);
    ui->audioPlot->addItem(cur_play_pos_);
    cur_play_pos_->setVisible(false);

    ui->audioPlot->xAxis->setNumberFormat("gb");
    ui->audioPlot->xAxis->setNumberPrecision(3);
    ui->audioPlot->xAxis->setDateTimeFormat("yyyy-MM-dd\nhh:mm:ss.zzz");
    ui->audioPlot->yAxis->setVisible(false);

    ui->playButton->setIcon(StockIcon("media-playback-start"));
    ui->stopButton->setIcon(StockIcon("media-playback-stop"));

    QString default_out_name = QAudioDeviceInfo::defaultOutputDevice().deviceName();
    foreach (QAudioDeviceInfo out_device, QAudioDeviceInfo::availableDevices(QAudio::AudioOutput)) {
        QString out_name = out_device.deviceName();
        ui->outputDeviceComboBox->addItem(out_name);
        if (out_name == default_out_name) {
            ui->outputDeviceComboBox->setCurrentText(out_name);
        }
    }
    if (ui->outputDeviceComboBox->count() < 1) {
        ui->outputDeviceComboBox->setEnabled(false);
        ui->playButton->setEnabled(false);
        ui->stopButton->setEnabled(false);
        ui->outputDeviceComboBox->addItem(tr("No devices available"));
    }

    ui->audioPlot->setMouseTracking(true);
    ui->audioPlot->setEnabled(true);
    ui->audioPlot->setInteractions(
                QCP::iRangeDrag |
                QCP::iRangeZoom
                );
    ui->audioPlot->setFocus();

    QTimer::singleShot(0, this, SLOT(retapPackets()));
#endif // QT_MULTIMEDIA_LIB
}

QPushButton *RtpPlayerDialog::addPlayerButton(QDialogButtonBox *button_box)
{
    if (!button_box) return NULL;

    QPushButton *player_button;
    player_button = button_box->addButton(tr("Play Streams"), QDialogButtonBox::ApplyRole);
    player_button->setIcon(StockIcon("media-playback-start"));
    return player_button;
}

#ifdef QT_MULTIMEDIA_LIB
RtpPlayerDialog::~RtpPlayerDialog()
{
    delete ui;
}

void RtpPlayerDialog::accept()
{
    int row_count = ui->streamTreeWidget->topLevelItemCount();
    // Stop all streams before the dialogs are closed.
    for (int row = 0; row < row_count; row++) {
        QTreeWidgetItem *ti = ui->streamTreeWidget->topLevelItem(row);
        RtpAudioStream *audio_stream = ti->data(stream_data_col_, Qt::UserRole).value<RtpAudioStream*>();
        audio_stream->stopPlaying();
    }
    WiresharkDialog::accept();
}

void RtpPlayerDialog::reject()
{
    RtpPlayerDialog::accept();
}

void RtpPlayerDialog::retapPackets()
{
    register_tap_listener("rtp", this, NULL, 0, NULL, tapPacket, NULL);
    cap_file_.retapPackets();
    remove_tap_listener(this);

    rescanPackets(true);
}

void RtpPlayerDialog::rescanPackets(bool rescale_axes)
{
    int row_count = ui->streamTreeWidget->topLevelItemCount();
    // Clear existing graphs and reset stream values
    for (int row = 0; row < row_count; row++) {
        QTreeWidgetItem *ti = ui->streamTreeWidget->topLevelItem(row);
        RtpAudioStream *audio_stream = ti->data(stream_data_col_, Qt::UserRole).value<RtpAudioStream*>();
        audio_stream->reset(start_rel_time_);

        ti->setData(graph_data_col_, Qt::UserRole, QVariant());
    }
    ui->audioPlot->clearGraphs();

    bool show_legend = false;
    bool relative_timestamps = !ui->todCheckBox->isChecked();

    ui->audioPlot->xAxis->setTickLabelType(relative_timestamps ? QCPAxis::ltNumber : QCPAxis::ltDateTime);

    for (int row = 0; row < row_count; row++) {
        QTreeWidgetItem *ti = ui->streamTreeWidget->topLevelItem(row);
        RtpAudioStream *audio_stream = ti->data(stream_data_col_, Qt::UserRole).value<RtpAudioStream*>();
        int y_offset = row_count - row - 1;

        audio_stream->setJitterBufferSize((int) ui->jitterSpinBox->value());

        RtpAudioStream::TimingMode timing_mode = RtpAudioStream::JitterBuffer;
        switch (ui->timingComboBox->currentIndex()) {
        case RtpAudioStream::RtpTimestamp:
            timing_mode = RtpAudioStream::RtpTimestamp;
            break;
        case RtpAudioStream::Uninterrupted:
            timing_mode = RtpAudioStream::Uninterrupted;
            break;
        default:
            break;
        }
        audio_stream->setTimingMode(timing_mode);

        audio_stream->decode();

        // Waveform
        QCPGraph *audio_graph = ui->audioPlot->addGraph();
        QPen wf_pen(audio_stream->color());
        wf_pen.setWidthF(wf_graph_normal_width_);
        audio_graph->setPen(wf_pen);
        wf_pen.setWidthF(wf_graph_selected_width_);
        audio_graph->setSelectedPen(wf_pen);
        audio_graph->setSelectable(false);
        audio_graph->setData(audio_stream->visualTimestamps(relative_timestamps), audio_stream->visualSamples(y_offset));
        audio_graph->removeFromLegend();
        ti->setData(graph_data_col_, Qt::UserRole, QVariant::fromValue<QCPGraph *>(audio_graph));
        RTP_STREAM_DEBUG("Plotting %s, %d samples", ti->text(src_addr_col_).toUtf8().constData(), audio_graph->data()->keys().length());

        QString span_str = QString("%1 - %2 (%3)")
                .arg(QString::number(audio_stream->startRelTime(), 'g', 3))
                .arg(QString::number(audio_stream->stopRelTime(), 'g', 3))
                .arg(QString::number(audio_stream->stopRelTime() - audio_stream->startRelTime(), 'g', 3));
        ti->setText(time_span_col_, span_str);
        ti->setText(sample_rate_col_, QString::number(audio_stream->sampleRate()));
        ti->setText(payload_col_, audio_stream->payloadNames().join(", "));

        if (audio_stream->outOfSequence() > 0) {
            // Sequence numbers
            QCPGraph *seq_graph = ui->audioPlot->addGraph();
            seq_graph->setLineStyle(QCPGraph::lsNone);
            seq_graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssSquare, tango_aluminium_6, Qt::white, 4)); // Arbitrary
            seq_graph->setSelectable(false);
            seq_graph->setData(audio_stream->outOfSequenceTimestamps(relative_timestamps), audio_stream->outOfSequenceSamples(y_offset));
            if (row < 1) {
                seq_graph->setName(tr("Out of Sequence"));
                show_legend = true;
            } else {
                seq_graph->removeFromLegend();
            }
        }

        if (audio_stream->jitterDropped() > 0) {
            // Jitter drops
            QCPGraph *seq_graph = ui->audioPlot->addGraph();
            seq_graph->setLineStyle(QCPGraph::lsNone);
            seq_graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, tango_scarlet_red_5, Qt::white, 4)); // Arbitrary
            seq_graph->setSelectable(false);
            seq_graph->setData(audio_stream->jitterDroppedTimestamps(relative_timestamps), audio_stream->jitterDroppedSamples(y_offset));
            if (row < 1) {
                seq_graph->setName(tr("Jitter Drops"));
                show_legend = true;
            } else {
                seq_graph->removeFromLegend();
            }
        }

        if (audio_stream->wrongTimestamps() > 0) {
            // Wrong timestamps
            QCPGraph *seq_graph = ui->audioPlot->addGraph();
            seq_graph->setLineStyle(QCPGraph::lsNone);
            seq_graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssDiamond, tango_sky_blue_5, Qt::white, 4)); // Arbitrary
            seq_graph->setSelectable(false);
            seq_graph->setData(audio_stream->wrongTimestampTimestamps(relative_timestamps), audio_stream->wrongTimestampSamples(y_offset));
            if (row < 1) {
                seq_graph->setName(tr("Wrong Timestamps"));
                show_legend = true;
            } else {
                seq_graph->removeFromLegend();
            }
        }

        if (audio_stream->insertedSilences() > 0) {
            // Inserted silence
            QCPGraph *seq_graph = ui->audioPlot->addGraph();
            seq_graph->setLineStyle(QCPGraph::lsNone);
            seq_graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssTriangle, tango_butter_5, Qt::white, 4)); // Arbitrary
            seq_graph->setSelectable(false);
            seq_graph->setData(audio_stream->insertedSilenceTimestamps(relative_timestamps), audio_stream->insertedSilenceSamples(y_offset));
            if (row < 1) {
                seq_graph->setName(tr("Inserted Silence"));
                show_legend = true;
            } else {
                seq_graph->removeFromLegend();
            }
        }
    }
    ui->audioPlot->legend->setVisible(show_legend);

    for (int col = 0; col < ui->streamTreeWidget->columnCount() - 1; col++) {
        ui->streamTreeWidget->resizeColumnToContents(col);
    }

    ui->audioPlot->replot();
    if (rescale_axes) resetXAxis();

    updateWidgets();
}

void RtpPlayerDialog::addRtpStream(struct _rtp_stream_info *rtp_stream)
{
    if (!rtp_stream) return;

    // Find the RTP streams associated with this conversation.
    // gtk/rtp_player.c:mark_rtp_stream_to_play does this differently.

    RtpAudioStream *audio_stream = NULL;
    int tli_count = ui->streamTreeWidget->topLevelItemCount();
    for (int row = 0; row < tli_count; row++) {
        QTreeWidgetItem *ti = ui->streamTreeWidget->topLevelItem(row);
        RtpAudioStream *row_stream = ti->data(stream_data_col_, Qt::UserRole).value<RtpAudioStream*>();
        if (row_stream->isMatch(rtp_stream)) {
            audio_stream = row_stream;
            break;
        }
    }

    if (!audio_stream) {
        audio_stream = new RtpAudioStream(this, rtp_stream);
        audio_stream->setColor(ColorUtils::graphColor(tli_count));

        QTreeWidgetItem *ti = new QTreeWidgetItem(ui->streamTreeWidget);
        ti->setText(src_addr_col_, address_to_qstring(&rtp_stream->src_addr));
        ti->setText(src_port_col_, QString::number(rtp_stream->src_port));
        ti->setText(dst_addr_col_, address_to_qstring(&rtp_stream->dest_addr));
        ti->setText(dst_port_col_, QString::number(rtp_stream->dest_port));
        ti->setText(ssrc_col_, int_to_qstring(rtp_stream->ssrc, 8, 16));
        ti->setText(first_pkt_col_, QString::number(rtp_stream->setup_frame_number));
        ti->setText(num_pkts_col_, QString::number(rtp_stream->packet_count));

        ti->setData(stream_data_col_, Qt::UserRole, QVariant::fromValue(audio_stream));

        for (int col = 0; col < ui->streamTreeWidget->columnCount(); col++) {
            ti->setTextColor(col, audio_stream->color());
        }

        connect(ui->playButton, SIGNAL(clicked(bool)), audio_stream, SLOT(startPlaying()));
        connect(ui->stopButton, SIGNAL(clicked(bool)), audio_stream, SLOT(stopPlaying()));

        connect(audio_stream, SIGNAL(startedPlaying()), this, SLOT(updateWidgets()));
        connect(audio_stream, SIGNAL(finishedPlaying()), this, SLOT(updateWidgets()));
        connect(audio_stream, SIGNAL(playbackError(QString)), this, SLOT(setPlaybackError(QString)));
        connect(audio_stream, SIGNAL(processedSecs(double)), this, SLOT(setPlayPosition(double)));
    }
    audio_stream->addRtpStream(rtp_stream);
    double start_rel_time = nstime_to_sec(&rtp_stream->start_rel_time);
    if (tli_count < 2) {
        start_rel_time_ = start_rel_time;
    } else {
        start_rel_time_ = qMin(start_rel_time_, start_rel_time);
    }
    RTP_STREAM_DEBUG("adding stream %d to layout, %u packets, %u in list, start %u",
                     ui->streamTreeWidget->topLevelItemCount(),
                     rtp_stream->packet_count,
                     g_list_length(rtp_stream->rtp_packet_list),
                     rtp_stream->start_fd ? rtp_stream->start_fd->num : 0);
}

void RtpPlayerDialog::showEvent(QShowEvent *)
{
    QList<int> split_sizes = ui->splitter->sizes();
    int tot_size = split_sizes[0] + split_sizes[1];
    int plot_size = tot_size * 3 / 4;
    split_sizes.clear();
    split_sizes << plot_size << tot_size - plot_size;
    ui->splitter->setSizes(split_sizes);
}

void RtpPlayerDialog::keyPressEvent(QKeyEvent *event)
{
    int pan_secs = event->modifiers() & Qt::ShiftModifier ? 1 : 10;

    switch(event->key()) {
    case Qt::Key_Minus:
    case Qt::Key_Underscore:    // Shifted minus on U.S. keyboards
    case Qt::Key_O:             // GTK+
    case Qt::Key_R:
        on_actionZoomOut_triggered();
        break;
    case Qt::Key_Plus:
    case Qt::Key_Equal:         // Unshifted plus on U.S. keyboards
    case Qt::Key_I:             // GTK+
        on_actionZoomIn_triggered();
        break;

    case Qt::Key_Right:
    case Qt::Key_L:
        panXAxis(pan_secs);
        break;
    case Qt::Key_Left:
    case Qt::Key_H:
        panXAxis(-1 * pan_secs);
        break;

    case Qt::Key_Space:
//        toggleTracerStyle();
        break;

    case Qt::Key_0:
    case Qt::Key_ParenRight:    // Shifted 0 on U.S. keyboards
    case Qt::Key_Home:
        on_actionReset_triggered();
        break;

    case Qt::Key_G:
        on_actionGoToPacket_triggered();
        break;
    case Qt::Key_T:
//        on_actionToggleTimeOrigin_triggered();
        break;
    case Qt::Key_Z:
//        on_actionDragZoom_triggered();
        break;
    }

    QDialog::keyPressEvent(event);
}

void RtpPlayerDialog::updateWidgets()
{
    bool enable_play = true;
    bool enable_stop = false;
    bool enable_timing = true;

    for (int row = 0; row < ui->streamTreeWidget->topLevelItemCount(); row++) {
        QTreeWidgetItem *ti = ui->streamTreeWidget->topLevelItem(row);

        RtpAudioStream *audio_stream = ti->data(src_addr_col_, Qt::UserRole).value<RtpAudioStream*>();
        if (audio_stream->outputState() != QAudio::IdleState) {
            enable_play = false;
            enable_stop = true;
            enable_timing = false;
        }
    }

    ui->playButton->setEnabled(enable_play);
    ui->outputDeviceComboBox->setEnabled(enable_play);
    ui->stopButton->setEnabled(enable_stop);
    cur_play_pos_->setVisible(enable_stop);

    ui->jitterSpinBox->setEnabled(enable_timing);
    ui->timingComboBox->setEnabled(enable_timing);
    ui->todCheckBox->setEnabled(enable_timing);

    updateHintLabel();
    ui->audioPlot->replot();
}

void RtpPlayerDialog::graphClicked(QMouseEvent *event)
{
    updateWidgets();
    if (event->button() == Qt::RightButton) {
        ctx_menu_->exec(event->globalPos());
    }
    ui->audioPlot->setFocus();
}

void RtpPlayerDialog::updateHintLabel()
{
    int packet_num = getHoveredPacket();
    QString hint = "<small><i>";

    if (packet_num > 0) {
        hint += tr("%1. Press \"G\" to go to packet %2")
                .arg(getHoveredTime())
                .arg(packet_num);
    } else if (!playback_error_.isEmpty()) {
        hint += playback_error_;
    }

    hint += "</i></small>";
    ui->hintLabel->setText(hint);
}

void RtpPlayerDialog::resetXAxis()
{
    QCustomPlot *ap = ui->audioPlot;
    QCPRange x_range = ap->xAxis->range();

    double pixel_pad = 10.0; // per side

    ap->rescaleAxes(true);

    double axis_pixels = ap->xAxis->axisRect()->width();
    ap->xAxis->scaleRange((axis_pixels + (pixel_pad * 2)) / axis_pixels, x_range.center());

    axis_pixels = ap->yAxis->axisRect()->height();
    ap->yAxis->scaleRange((axis_pixels + (pixel_pad * 2)) / axis_pixels, ap->yAxis->range().center());

    ap->replot();
}

void RtpPlayerDialog::setPlayPosition(double secs)
{
    secs+= start_rel_time_;
    double cur_secs = cur_play_pos_->point1->key();
    if (secs > cur_secs) {
        cur_play_pos_->point1->setCoords(secs, 0.0);
        cur_play_pos_->point2->setCoords(secs, 1.0);
        ui->audioPlot->replot();
    }
}

gboolean RtpPlayerDialog::tapPacket(void *tapinfo_ptr, packet_info *pinfo, epan_dissect_t *, const void *rtpinfo_ptr)
{
    RtpPlayerDialog *rtp_player_dialog = dynamic_cast<RtpPlayerDialog *>((RtpPlayerDialog*)tapinfo_ptr);
    if (!rtp_player_dialog) return FALSE;

    const struct _rtp_info *rtpinfo = (const struct _rtp_info *)rtpinfo_ptr;
    if (!rtpinfo) return FALSE;

    /* we ignore packets that are not displayed */
    if (pinfo->fd->flags.passed_dfilter == 0)
        return FALSE;
    /* also ignore RTP Version != 2 */
    else if (rtpinfo->info_version != 2)
        return FALSE;

    rtp_player_dialog->addPacket(pinfo, rtpinfo);

    return FALSE;
}

void RtpPlayerDialog::addPacket(packet_info *pinfo, const _rtp_info *rtpinfo)
{
    for (int row = 0; row < ui->streamTreeWidget->topLevelItemCount(); row++) {
        QTreeWidgetItem *ti = ui->streamTreeWidget->topLevelItem(row);
        RtpAudioStream *row_stream = ti->data(stream_data_col_, Qt::UserRole).value<RtpAudioStream*>();

        if (row_stream->isMatch(pinfo, rtpinfo)) {
            row_stream->addRtpPacket(pinfo, rtpinfo);
            return;
        }
    }
//    qDebug() << "=ap no match!" << address_to_qstring(&pinfo->src) << address_to_qstring(&pinfo->dst);
}

void RtpPlayerDialog::zoomXAxis(bool in)
{
    QCustomPlot *ap = ui->audioPlot;
    double h_factor = ap->axisRect()->rangeZoomFactor(Qt::Horizontal);

    if (!in) {
        h_factor = pow(h_factor, -1);
    }

    ap->xAxis->scaleRange(h_factor, ap->xAxis->range().center());
    ap->replot();
}

// XXX I tried using seconds but pixels make more sense at varying zoom
// levels.
void RtpPlayerDialog::panXAxis(int x_pixels)
{
    QCustomPlot *ap = ui->audioPlot;
    double h_pan;

    h_pan = ap->xAxis->range().size() * x_pixels / ap->xAxis->axisRect()->width();
    if (x_pixels) {
        ap->xAxis->moveRange(h_pan);
        ap->replot();
    }
}

void RtpPlayerDialog::on_playButton_clicked()
{
    double left = start_rel_time_;
    cur_play_pos_->point1->setCoords(left, 0.0);
    cur_play_pos_->point2->setCoords(left, 1.0);
    cur_play_pos_->setVisible(true);
    playback_error_.clear();
    ui->audioPlot->replot();
}

void RtpPlayerDialog::on_stopButton_clicked()
{
    cur_play_pos_->setVisible(false);
}

void RtpPlayerDialog::on_actionReset_triggered()
{
    resetXAxis();
}

void RtpPlayerDialog::on_actionZoomIn_triggered()
{
    zoomXAxis(true);
}

void RtpPlayerDialog::on_actionZoomOut_triggered()
{
    zoomXAxis(false);
}

void RtpPlayerDialog::on_actionMoveLeft10_triggered()
{
    panXAxis(-10);
}

void RtpPlayerDialog::on_actionMoveRight10_triggered()
{
    panXAxis(10);
}

void RtpPlayerDialog::on_actionMoveLeft1_triggered()
{
    panXAxis(-1);
}

void RtpPlayerDialog::on_actionMoveRight1_triggered()
{
    panXAxis(1);
}

void RtpPlayerDialog::on_actionGoToPacket_triggered()
{
    int packet_num = getHoveredPacket();
    if (packet_num > 0) emit goToPacket(packet_num);
}

// XXX Make waveform graphs selectable and update the treewidget selection accordingly.
void RtpPlayerDialog::on_streamTreeWidget_itemSelectionChanged()
{
    for (int row = 0; row < ui->streamTreeWidget->topLevelItemCount(); row++) {
        QTreeWidgetItem *ti = ui->streamTreeWidget->topLevelItem(row);
        QCPGraph *audio_graph = ti->data(graph_data_col_, Qt::UserRole).value<QCPGraph*>();
        if (audio_graph) {
            audio_graph->setSelected(ti->isSelected());
        }
    }
    ui->audioPlot->replot();
}

double RtpPlayerDialog::getLowestTimestamp()
{
    double lowest = QCPRange::maxRange;

    for (int i = 0; i < ui->audioPlot->graphCount(); i++) {
        QCPGraph *graph = ui->audioPlot->graph(i);
        if (!graph->visible()) continue;
        QCPDataMap *dm = graph->data();
        if (dm->keys().length() < 1) continue;
        lowest = qMin(lowest, dm->keys().first());
    }
    return lowest;
}

const QString RtpPlayerDialog::getHoveredTime()
{
    QTreeWidgetItem *ti = ui->streamTreeWidget->currentItem();
    if (!ti) return tr("Unknown");

    QString time_str;
    double ts = ui->audioPlot->xAxis->pixelToCoord(ui->audioPlot->mapFromGlobal(QCursor::pos()).x());

    if (ui->todCheckBox->isChecked()) {
        QDateTime date_time = QDateTime::fromMSecsSinceEpoch(ts * 1000.0);
        time_str = date_time.toString("yyyy-MM-dd hh:mm:ss.zzz");
    } else {
        time_str = QString::number(ts, 'f', 3);
        time_str += " s";
    }
    return time_str;
}

int RtpPlayerDialog::getHoveredPacket()
{
    QTreeWidgetItem *ti = ui->streamTreeWidget->currentItem();
    if (!ti) return 0;

    RtpAudioStream *audio_stream = ti->data(src_addr_col_, Qt::UserRole).value<RtpAudioStream*>();

    double ts = ui->audioPlot->xAxis->pixelToCoord(ui->audioPlot->mapFromGlobal(QCursor::pos()).x());

    return audio_stream->nearestPacket(ts, !ui->todCheckBox->isChecked());
}

// Used by RtpAudioStreams to initialize QAudioOutput. We could alternatively
// pass the corresponding QAudioDeviceInfo directly.
QString RtpPlayerDialog::currentOutputDeviceName()
{
    return ui->outputDeviceComboBox->currentText();
}

void RtpPlayerDialog::on_jitterSpinBox_valueChanged(double)
{
    rescanPackets();
}

void RtpPlayerDialog::on_timingComboBox_currentIndexChanged(int)
{
    rescanPackets();
}

void RtpPlayerDialog::on_todCheckBox_toggled(bool)
{
    QCPAxis *x_axis = ui->audioPlot->xAxis;
    double old_lowest = getLowestTimestamp();

    rescanPackets();
    x_axis->moveRange(getLowestTimestamp() - old_lowest);
    ui->audioPlot->replot();
}

void RtpPlayerDialog::on_buttonBox_helpRequested()
{
    wsApp->helpTopicAction(HELP_TELEPHONY_RTP_PLAYER_DIALOG);
}

#if 0
// This also serves as a title in RtpAudioFrame.
static const QString stream_key_tmpl_ = "%1:%2 " UTF8_RIGHTWARDS_ARROW " %3:%4 0x%5";
const QString RtpPlayerDialog::streamKey(const struct _rtp_stream_info *rtp_stream)
{
    const QString stream_key = QString(stream_key_tmpl_)
            .arg(address_to_display_qstring(&rtp_stream->src_addr))
            .arg(rtp_stream->src_port)
            .arg(address_to_display_qstring(&rtp_stream->dest_addr))
            .arg(rtp_stream->dest_port)
            .arg(rtp_stream->ssrc, 0, 16);
    return stream_key;
}

const QString RtpPlayerDialog::streamKey(const packet_info *pinfo, const struct _rtp_info *rtpinfo)
{
    const QString stream_key = QString(stream_key_tmpl_)
            .arg(address_to_display_qstring(&pinfo->src))
            .arg(pinfo->srcport)
            .arg(address_to_display_qstring(&pinfo->dst))
            .arg(pinfo->destport)
            .arg(rtpinfo->info_sync_src, 0, 16);
    return stream_key;
}
#endif

#endif // QT_MULTIMEDIA_LIB

/*
 * Editor modelines
 *
 * Local Variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */