mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-28 03:00:35 +00:00
qroverlay: Rework basing it on overlaycomposition
The base class is now a bin which wraps the `overlaycomposition` element and implements the `draw` signal. This way we support all the video formats the GstVideoOverlayComposition API supports and the blending code can be reused. It is also possible to have the blending happen in the sinks now. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1829>
This commit is contained in:
Thibault Saunier
GStreamer Merge Bot
parent
3e35a6f03f
commit
ad5f812c91
4 changed files with 171 additions and 127 deletions
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@ -62,26 +62,30 @@ struct _GstBaseQROverlayPrivate
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QRecLevel level;
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gfloat x_percent;
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gfloat y_percent;
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GstElement *overlaycomposition;
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GstVideoInfo info;
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gboolean valid;
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GstPad *sinkpad, *srcpad;
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};
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#define PRIV(s) gst_base_qr_overlay_get_instance_private (GST_BASE_QR_OVERLAY (s))
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#define OVERLAY_COMPOSITION_CAPS GST_VIDEO_CAPS_MAKE (GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS)
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#define ALL_CAPS OVERLAY_COMPOSITION_CAPS ";" \
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY", GST_VIDEO_FORMATS_ALL)
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, "
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"format = (string) { I420 }, "
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"framerate = (fraction) [0, MAX], "
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"width = (int) [ 16, MAX ], " "height = (int) [ 16, MAX ]")
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GST_STATIC_CAPS (ALL_CAPS)
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);
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, "
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"format = (string) { I420 }, "
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"framerate = (fraction) [0, MAX], "
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"width = (int) [ 16, MAX ], " "height = (int) [ 16, MAX ]")
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GST_STATIC_CAPS (ALL_CAPS)
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);
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#define DEFAULT_PROP_QUALITY 1
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@ -110,16 +114,132 @@ gst_qrcode_quality_get_type (void)
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#define gst_base_qr_overlay_parent_class parent_class
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G_DEFINE_TYPE_WITH_PRIVATE (GstBaseQROverlay, gst_base_qr_overlay,
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GST_TYPE_VIDEO_FILTER);
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GST_TYPE_BIN);
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static void gst_base_qr_overlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_base_qr_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstFlowReturn
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gst_base_qr_overlay_transform_frame_ip (GstVideoFilter * base,
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GstVideoFrame * frame);
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static void
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gst_base_qr_overlay_caps_changed_cb (GstBaseQROverlay * self, GstCaps * caps,
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gint window_width, gint window_height, GstElement * overlay)
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{
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GstBaseQROverlayPrivate *priv = PRIV (self);
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if (gst_video_info_from_caps (&priv->info, caps))
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priv->valid = TRUE;
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else
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priv->valid = FALSE;
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}
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static GstVideoOverlayComposition *
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draw_overlay (GstBaseQROverlay * self, QRcode * qrcode)
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{
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guint8 *qr_data, *pixels;
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gint stride, pstride, y, x, yy, square_size;
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gsize offset, line_offset;
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GstVideoInfo info;
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GstVideoOverlayRectangle *rect;
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GstVideoOverlayComposition *comp;
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GstBuffer *buf;
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GstBaseQROverlayPrivate *priv = PRIV (self);
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gst_video_info_init (&info);
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square_size = (qrcode->width + 4 * 2) * priv->qrcode_size;
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gst_video_info_set_format (&info, GST_VIDEO_FORMAT_ARGB, square_size,
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square_size);
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pixels = g_malloc ((size_t) info.size);
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stride = info.stride[0];
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pstride = info.finfo->pixel_stride[0];
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/* White background */
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for (y = 0; y < info.height; y++)
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memset (&pixels[y * stride], 0xff, stride);
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/* Draw the black QR code blocks with 4px white space around it
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* on top */
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line_offset = 4 * priv->qrcode_size * stride;
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qr_data = qrcode->data;
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for (y = 0; y < qrcode->width; y++) {
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for (x = 0; x < (qrcode->width); x++) {
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for (yy = 0; yy < priv->qrcode_size * pstride; yy += pstride) {
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if (!(*qr_data & 1))
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continue;
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offset =
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(((line_offset + (stride * (yy / pstride))) +
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x * priv->qrcode_size * pstride)) +
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(priv->qrcode_size * pstride) + (4 * priv->qrcode_size * pstride);
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for (gint i = 0; i < priv->qrcode_size * pstride; i += pstride) {
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pixels[offset + i] = 0x00;
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pixels[offset + i + 1] = 0x00;
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pixels[offset + i + 2] = 0x00;
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}
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}
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qr_data++;
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}
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line_offset += (stride * priv->qrcode_size);
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}
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buf = gst_buffer_new_wrapped (pixels, info.size);
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gst_buffer_add_video_meta (buf, GST_VIDEO_FRAME_FLAG_NONE,
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GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB, info.width, info.height);
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x = (int) (priv->info.width - square_size) * (priv->x_percent / 100);
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x = GST_ROUND_DOWN_2 (x);
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y = (int) (priv->info.height - square_size) * (priv->y_percent / 100);
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y = GST_ROUND_DOWN_4 (y);
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rect = gst_video_overlay_rectangle_new_raw (buf, x, y,
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info.width, info.height, GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE);
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comp = gst_video_overlay_composition_new (rect);
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gst_video_overlay_rectangle_unref (rect);
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return comp;
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}
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static GstVideoOverlayComposition *
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gst_base_qr_overlay_draw_cb (GstBaseQROverlay * self, GstSample * sample,
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GstElement * _)
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{
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GstBaseQROverlayPrivate *priv = PRIV (self);
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QRcode *qrcode;
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gchar *content;
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GstVideoOverlayComposition *overlay = NULL;
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GstBuffer *buffer = gst_sample_get_buffer (sample);
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GstSegment *segment = gst_sample_get_segment (sample);
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GstClockTime rtime = gst_segment_to_running_time (segment, GST_FORMAT_TIME,
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GST_BUFFER_PTS (buffer));
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if (!priv->valid) {
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GST_ERROR_OBJECT (self, "Trying to draw before negotiation?");
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return NULL;
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}
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if (GST_CLOCK_TIME_IS_VALID (rtime))
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gst_object_sync_values (GST_OBJECT (self), rtime);
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content =
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GST_BASE_QR_OVERLAY_GET_CLASS (self)->get_content (GST_BASE_QR_OVERLAY
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(self), buffer, &priv->info);
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GST_INFO_OBJECT (self, "String will be encoded : %s", content);
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qrcode = QRcode_encodeString (content, 0, priv->qrcode_quality, QR_MODE_8, 0);
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if (qrcode) {
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GST_DEBUG_OBJECT (self, "String encoded");
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overlay = draw_overlay (GST_BASE_QR_OVERLAY (self), qrcode);
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} else {
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GST_WARNING_OBJECT (self, "Could not encode content: %s", content);
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}
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g_free (content);
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return overlay;
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}
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/* GObject vmethod implementations */
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@ -136,6 +256,9 @@ gst_base_qr_overlay_class_init (GstBaseQROverlayClass * klass)
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gobject_class->set_property = gst_base_qr_overlay_set_property;
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gobject_class->get_property = gst_base_qr_overlay_get_property;
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GST_DEBUG_CATEGORY_INIT (gst_base_qr_overlay_debug, "qroverlay", 0,
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"Qrcode overlay base class");
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g_object_class_install_property (gobject_class,
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PROP_X_AXIS, g_param_spec_float ("x",
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"X position (in percent of the width)",
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@ -164,9 +287,6 @@ gst_base_qr_overlay_class_init (GstBaseQROverlayClass * klass)
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gst_static_pad_template_get (&sink_template));
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gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
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GST_VIDEO_FILTER_CLASS (klass)->transform_frame_ip =
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GST_DEBUG_FUNCPTR (gst_base_qr_overlay_transform_frame_ip);
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gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
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}
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@ -174,15 +294,39 @@ gst_base_qr_overlay_class_init (GstBaseQROverlayClass * klass)
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* initialize instance structure
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*/
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static void
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gst_base_qr_overlay_init (GstBaseQROverlay * filter)
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gst_base_qr_overlay_init (GstBaseQROverlay * self)
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{
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GstBaseQROverlayPrivate *priv = PRIV (filter);
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GstBaseQROverlayPrivate *priv = PRIV (self);
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priv->x_percent = 50.0;
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priv->y_percent = 50.0;
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priv->qrcode_quality = DEFAULT_PROP_QUALITY;
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priv->span_frame = 0;
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priv->qrcode_size = DEFAULT_PROP_PIXEL_SIZE;
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priv->overlaycomposition =
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gst_element_factory_make ("overlaycomposition", NULL);
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gst_video_info_init (&priv->info);
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if (priv->overlaycomposition) {
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GstPadTemplate *sink_tmpl = gst_static_pad_template_get (&sink_template);
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GstPadTemplate *src_tmpl = gst_static_pad_template_get (&src_template);
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gst_bin_add (GST_BIN (self), priv->overlaycomposition);
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gst_element_add_pad (GST_ELEMENT_CAST (self),
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gst_ghost_pad_new_from_template ("sink",
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priv->overlaycomposition->sinkpads->data, sink_tmpl));
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gst_element_add_pad (GST_ELEMENT_CAST (self),
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gst_ghost_pad_new_from_template ("src",
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priv->overlaycomposition->srcpads->data, src_tmpl));
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gst_object_unref (sink_tmpl);
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gst_object_unref (src_tmpl);
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g_signal_connect_swapped (priv->overlaycomposition, "draw",
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G_CALLBACK (gst_base_qr_overlay_draw_cb), self);
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g_signal_connect_swapped (priv->overlaycomposition, "caps-changed",
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G_CALLBACK (gst_base_qr_overlay_caps_changed_cb), self);
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}
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}
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static void
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@ -234,103 +378,3 @@ gst_base_qr_overlay_get_property (GObject * object, guint prop_id,
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break;
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}
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}
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static void
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overlay_qr_in_frame (GstBaseQROverlay * filter, QRcode * qrcode,
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GstVideoFrame * frame)
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{
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GstBaseQROverlayPrivate *priv = PRIV (filter);
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guchar *source_data;
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gint32 k, y, x, yy, square_size, line = 0;
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int x1, x2, y1, y2;
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guint8 *d;
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gint stride;
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square_size = (qrcode->width + 4 * 2) * priv->qrcode_size;
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/* White bg */
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x1 = (int) (GST_VIDEO_FRAME_WIDTH (frame) -
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square_size) * (priv->x_percent / 100);
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x1 = GST_ROUND_DOWN_2 (x1);
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x2 = x1 + square_size;
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y1 = (int) (GST_VIDEO_FRAME_HEIGHT (frame) -
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square_size) * (priv->y_percent / 100);
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y1 = GST_ROUND_DOWN_4 (y1);
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y2 = y1 + square_size;
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
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stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
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/* Start drawing the white luma plane */
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for (y = y1; y < y2; y++) {
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for (x = x1; x < x2; x += square_size)
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memset (&d[y * stride + x], 0xff, square_size);
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}
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/* Draw the black QR code blocks with 4px white space around it
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* on top */
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line += 4 * priv->qrcode_size * stride;
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source_data = qrcode->data;
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for (y = 0; y < qrcode->width; y++) {
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for (x = 0; x < (qrcode->width); x++) {
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for (yy = 0; yy < priv->qrcode_size; yy++) {
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k = ((((line + (4 * priv->qrcode_size))) + stride * yy +
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x * priv->qrcode_size) + x1) + (y1 * stride);
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if (*source_data & 1) {
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memset (d + k, 0, priv->qrcode_size);
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}
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}
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source_data++;
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}
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line += (stride * priv->qrcode_size);
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}
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/* Set Chrominance planes */
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x1 /= 2;
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x2 /= 2;
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y1 /= 2;
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y2 /= 2;
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stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 1);
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for (y = y1; y < y2; y++) {
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for (x = x1; x < x2; x += (x2 - x1)) {
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 1);
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memset (&d[y * stride + x], 128, (x2 - x1));
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 2);
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memset (&d[y * stride + x], 128, (x2 - x1));
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}
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}
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QRcode_free (qrcode);
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}
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/* GstBaseTransform vmethod implementations */
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/* this function does the actual processing
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*/
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static GstFlowReturn
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gst_base_qr_overlay_transform_frame_ip (GstVideoFilter * base,
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GstVideoFrame * frame)
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{
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GstBaseQROverlayPrivate *priv = PRIV (base);
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QRcode *qrcode;
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gchar *content;
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GstClockTime rtime =
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gst_segment_to_running_time (&GST_BASE_TRANSFORM (base)->segment,
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GST_FORMAT_TIME, GST_BUFFER_PTS (frame->buffer));
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if (GST_CLOCK_TIME_IS_VALID (rtime))
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gst_object_sync_values (GST_OBJECT (base), rtime);
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content =
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GST_BASE_QR_OVERLAY_GET_CLASS (base)->get_content (GST_BASE_QR_OVERLAY
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(base), frame);
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GST_INFO_OBJECT (base, "String will be encoded : %s", content);
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qrcode = QRcode_encodeString (content, 0, priv->qrcode_quality, QR_MODE_8, 0);
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if (qrcode) {
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GST_DEBUG_OBJECT (base, "String encoded");
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overlay_qr_in_frame (GST_BASE_QR_OVERLAY (base), qrcode, frame);
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} else {
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GST_WARNING_OBJECT (base, "Could not encode content: %s", content);
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}
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g_free (content);
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return GST_FLOW_OK;
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}
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@ -32,9 +32,9 @@ G_DECLARE_DERIVABLE_TYPE (GstBaseQROverlay, gst_base_qr_overlay, GST, BASE_QR_OV
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struct _GstBaseQROverlayClass
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{
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GstVideoFilterClass parent;
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GstBinClass parent;
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gchar* (*get_content) (GstBaseQROverlay *self, GstVideoFrame *frame);
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gchar* (*get_content) (GstBaseQROverlay *self, GstBuffer *buf, GstVideoInfo *info);
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};
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G_END_DECLS
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@ -59,8 +59,8 @@
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GST_DEBUG_CATEGORY_STATIC (gst_debug_qr_overlay_debug);
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#define GST_CAT_DEFAULT gst_debug_qr_overlay_debug
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static gchar *get_qrcode_content (GstBaseQROverlay * filter,
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GstVideoFrame * frame);
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static gchar *get_qrcode_content (GstBaseQROverlay * base, GstBuffer * buf,
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GstVideoInfo * info);
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enum
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{
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@ -231,14 +231,13 @@ gst_debug_qr_overlay_get_property (GObject * object, guint prop_id,
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}
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static gchar *
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get_qrcode_content (GstBaseQROverlay * base, GstVideoFrame * frame)
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get_qrcode_content (GstBaseQROverlay * base, GstBuffer * buf,
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GstVideoInfo * info)
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{
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GstDebugQROverlay *filter = GST_DEBUG_QR_OVERLAY (base);
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GstBuffer *buf = frame->buffer;
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GString *res = g_string_new (NULL);
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JsonGenerator *jgen;
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gchar *framerate_string =
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g_strdup_printf ("%d/%d", frame->info.fps_n, frame->info.fps_d);
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gchar *framerate_string = g_strdup_printf ("%d/%d", info->fps_n, info->fps_d);
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JsonObject *jobj = json_object_new ();
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JsonNode *root = json_node_new (JSON_NODE_OBJECT);
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@ -68,9 +68,10 @@ struct _GstQROverlay
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G_DEFINE_TYPE (GstQROverlay, gst_qr_overlay, GST_TYPE_BASE_QR_OVERLAY);
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static gchar *
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get_qrcode_content (GstBaseQROverlay * filter, GstVideoFrame * frame)
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get_qrcode_content (GstBaseQROverlay * self, GstBuffer * buf,
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GstVideoInfo * info)
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{
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return g_strdup (GST_QR_OVERLAY (filter)->data);
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return g_strdup (GST_QR_OVERLAY (self)->data);
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}
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static void
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