2 #include "qtcammode_p.h"
3 #include "qtcamdevice_p.h"
4 #include "qtcamdevice.h"
6 #include "qtcamgstreamermessagehandler.h"
7 #include "qtcamgstreamermessagelistener.h"
8 #include <gst/video/video.h>
11 #define PREVIEW_CAPS "video/x-raw-rgb, width = (int) %1, height = (int) %2, bpp = (int) 32, depth = (int) 24, red_mask = (int) 65280, green_mask = (int) 16711680, blue_mask = (int) -16777216"
13 class PreviewImageHandler : public QtCamGStreamerMessageHandler {
15 PreviewImageHandler(QtCamMode *m, QObject *parent = 0) :
16 QtCamGStreamerMessageHandler("preview-image", parent) {
20 virtual void handleMessage(GstMessage *message) {
21 const GstStructure *s = gst_message_get_structure(message);
26 const char *file = gst_structure_get_string(s, "location");
31 const GValue *val = gst_structure_get_value(s, "buffer");
36 GstBuffer *buffer = gst_value_get_buffer(val);
43 if (!gst_video_format_parse_caps(buffer->caps, &fmt, &width, &height)) {
47 if (fmt != GST_VIDEO_FORMAT_BGRx || width <= 0 || height <= 0) {
51 QImage image(buffer->data, width, height, QImage::Format_RGB32);
53 // We need to copy because GStreamer will free the buffer after we return
54 // and since QImage doesn't copythe data by default we will end up with garbage.
55 // TODO: consider a QImage subclass that takes a GstBuffer reference
56 QImage cp = image.copy();
58 QString fileName = QString::fromUtf8(file);
60 QMetaObject::invokeMethod(mode, "previewAvailable",
61 Q_ARG(QImage, cp), Q_ARG(QString, fileName));
67 class DoneHandler : public QtCamGStreamerMessageHandler {
69 DoneHandler(QtCamMode *m, const char *done, QObject *parent = 0) :
70 QtCamGStreamerMessageHandler(done, parent) {
74 virtual void handleMessage(GstMessage *message) {
75 const GstStructure *s = gst_message_get_structure(message);
76 if (gst_structure_has_field(s, "filename")) {
77 const char *str = gst_structure_get_string(s, "filename");
79 fileName = QString::fromUtf8(str);
83 QMetaObject::invokeMethod(mode, "saved", Q_ARG(QString, fileName));
90 QtCamMode::QtCamMode(QtCamModePrivate *d, const char *mode, const char *done, QObject *parent) :
91 QObject(parent), d_ptr(d) {
93 d_ptr->id = d_ptr->modeId(mode);
94 d_ptr->previewImageHandler = new PreviewImageHandler(this, this);
95 d_ptr->doneHandler = new DoneHandler(this, done, this);
98 QtCamMode::~QtCamMode() {
99 delete d_ptr; d_ptr = 0;
102 void QtCamMode::activate() {
103 if (!d_ptr->dev->cameraBin) {
107 if (d_ptr->dev->active == this) {
111 if (d_ptr->dev->active) {
112 d_ptr->dev->active->deactivate();
115 d_ptr->dev->active = this;
117 // TODO: check that we can actually do it. Perhaps the pipeline is busy.
118 g_object_set(d_ptr->dev->cameraBin, "mode", d_ptr->id, NULL);
120 // TODO: is that needed ?
121 // d_ptr->dev->resetCapabilities();
123 d_ptr->dev->listener->addHandler(d_ptr->previewImageHandler);
124 d_ptr->dev->listener->addHandler(d_ptr->doneHandler);
130 QMetaObject::invokeMethod(d_ptr->dev->q_ptr, "modeChanged");
132 emit activeChanged();
135 void QtCamMode::deactivate() {
136 if (d_ptr->dev->active != this) {
140 d_ptr->dev->listener->removeHandler(d_ptr->previewImageHandler);
141 d_ptr->dev->listener->removeHandler(d_ptr->doneHandler);
143 d_ptr->previewImageHandler->setParent(this);
144 d_ptr->doneHandler->setParent(this);
148 d_ptr->dev->active = 0;
150 QMetaObject::invokeMethod(d_ptr->dev->q_ptr, "modeChanged");
152 emit activeChanged();
155 bool QtCamMode::canCapture() {
156 return d_ptr->dev->cameraBin && isActive() && d_ptr->dev->q_ptr->isRunning();
159 bool QtCamMode::isActive() {
160 return d_ptr->dev->active == this;
163 void QtCamMode::setPreviewSize(const QSize& size) {
164 if (!d_ptr->dev->cameraBin) {
168 if (size.width() <= 0 && size.height() <= 0) {
169 g_object_set(d_ptr->dev->cameraBin, "preview-caps", NULL, "post-previews", FALSE, NULL);
172 QString preview = QString(PREVIEW_CAPS).arg(size.width()).arg(size.height());
174 GstCaps *caps = gst_caps_from_string(preview.toAscii());
176 g_object_set(d_ptr->dev->cameraBin, "preview-caps", caps, "post-previews", TRUE, NULL);
178 gst_caps_unref(caps);
182 void QtCamMode::setFileName(const QString& fileName) {
183 d_ptr->doneHandler->fileName = fileName;