--- /dev/null
+/* GStreamer
+ * Copyright (C) 2010 David A. Schleef <ds@schleef.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+GST_DEBUG_CATEGORY (gst_interlace_debug);
+#define GST_CAT_DEFAULT gst_interlace_debug
+
+#define GST_TYPE_INTERLACE \
+ (gst_interlace_get_type())
+#define GST_INTERLACE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_INTERLACE,GstInterlace))
+#define GST_INTERLACE_DEC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_INTERLACE,GstInterlaceClass))
+#define GST_IS_GST_INTERLACE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_INTERLACE))
+#define GST_IS_GST_INTERLACE_CLASS(obj) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_INTERLACE))
+
+typedef struct _GstInterlace GstInterlace;
+typedef struct _GstInterlaceClass GstInterlaceClass;
+
+struct _GstInterlace
+{
+ GstElement element;
+
+ GstPad *srcpad;
+ GstPad *sinkpad;
+ GstCaps *srccaps;
+
+ /* properties */
+ gboolean top_field_first;
+
+ /* state */
+ int width;
+ int height;
+ GstVideoFormat format;
+ GstBuffer *stored_frame;
+
+};
+
+struct _GstInterlaceClass
+{
+ GstElementClass element_class;
+
+};
+
+enum
+{
+ ARG_0,
+ PROP_TOP_FIELD_FIRST
+};
+
+static GstStaticPadTemplate gst_interlace_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{YUY2,UYVY,I420,YV12}")
+ ",interlaced=TRUE")
+ );
+
+static GstStaticPadTemplate gst_interlace_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{YUY2,UYVY,I420,YV12}")
+ ",interlaced=FALSE")
+ );
+
+static void gst_interlace_base_init (gpointer g_class);
+static void gst_interlace_class_init (GstInterlaceClass * klass);
+static void gst_interlace_init (GstInterlace * interlace);
+static GstFlowReturn gst_interlace_chain (GstPad * pad, GstBuffer * buffer);
+
+static void gst_interlace_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_interlace_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+
+static gboolean gst_interlace_setcaps (GstPad * pad, GstCaps * caps);
+static GstCaps *gst_interlace_getcaps (GstPad * pad);
+static GstStateChangeReturn gst_interlace_change_state (GstElement * element,
+ GstStateChange transition);
+
+static GstElementClass *parent_class = NULL;
+
+
+static GType
+gst_interlace_get_type (void)
+{
+ static GType interlace_type = 0;
+
+ if (!interlace_type) {
+ static const GTypeInfo interlace_info = {
+ sizeof (GstInterlaceClass),
+ gst_interlace_base_init,
+ NULL,
+ (GClassInitFunc) gst_interlace_class_init,
+ NULL,
+ NULL,
+ sizeof (GstInterlace),
+ 0,
+ (GInstanceInitFunc) gst_interlace_init,
+ };
+
+ interlace_type = g_type_register_static (GST_TYPE_ELEMENT,
+ "GstInterlace", &interlace_info, 0);
+ }
+
+ return interlace_type;
+}
+
+static void
+gst_interlace_base_init (gpointer g_class)
+{
+
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_set_details_simple (element_class,
+ "Inverse Telecine filter", "Filter/Video",
+ "Detects and reconstructs progressive content from telecine video",
+ "Entropy Wave <ds@entropywave.com>");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_interlace_sink_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_interlace_src_template));
+}
+
+static void
+gst_interlace_class_init (GstInterlaceClass * klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ object_class->set_property = gst_interlace_set_property;
+ object_class->get_property = gst_interlace_get_property;
+
+ element_class->change_state = gst_interlace_change_state;
+
+ g_object_class_install_property (object_class, PROP_TOP_FIELD_FIRST,
+ g_param_spec_boolean ("top-field-first", "top field first",
+ "Interlaced stream should be top field first", FALSE,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+}
+
+static void
+gst_interlace_init (GstInterlace * interlace)
+{
+ GST_DEBUG ("gst_interlace_init");
+ interlace->sinkpad =
+ gst_pad_new_from_static_template (&gst_interlace_sink_template, "sink");
+ gst_element_add_pad (GST_ELEMENT (interlace), interlace->sinkpad);
+ gst_pad_set_chain_function (interlace->sinkpad, gst_interlace_chain);
+ gst_pad_set_setcaps_function (interlace->sinkpad, gst_interlace_setcaps);
+ gst_pad_set_getcaps_function (interlace->sinkpad, gst_interlace_getcaps);
+
+ interlace->srcpad =
+ gst_pad_new_from_static_template (&gst_interlace_src_template, "src");
+ gst_element_add_pad (GST_ELEMENT (interlace), interlace->srcpad);
+ gst_pad_set_setcaps_function (interlace->srcpad, gst_interlace_setcaps);
+ gst_pad_set_getcaps_function (interlace->srcpad, gst_interlace_getcaps);
+
+ interlace->top_field_first = FALSE;
+}
+
+static GstCaps *
+gst_interlace_getcaps (GstPad * pad)
+{
+ GstInterlace *interlace;
+ GstPad *otherpad;
+ GstCaps *othercaps;
+ GstCaps *icaps;
+ GstStructure *structure;
+ int i;
+
+ interlace = GST_INTERLACE (gst_pad_get_parent (pad));
+
+ otherpad =
+ (pad == interlace->srcpad) ? interlace->sinkpad : interlace->srcpad;
+
+ othercaps = gst_pad_peer_get_caps (otherpad);
+ if (othercaps == NULL) {
+ icaps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
+ } else {
+ icaps = gst_caps_intersect (othercaps,
+ gst_pad_get_pad_template_caps (otherpad));
+ }
+
+ for (i = 0; i < gst_caps_get_size (icaps); i++) {
+ structure = gst_caps_get_structure (icaps, i);
+
+ if (pad == interlace->srcpad) {
+ gst_structure_set (structure, "interlaced", G_TYPE_BOOLEAN, TRUE, NULL);
+ } else {
+ gst_structure_set (structure, "interlaced", G_TYPE_BOOLEAN, FALSE, NULL);
+ }
+ }
+
+ return icaps;
+}
+
+static gboolean
+gst_interlace_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstInterlace *interlace;
+ gboolean ret;
+ int width, height;
+ GstVideoFormat format;
+ gboolean interlaced = TRUE;
+ int fps_n, fps_d;
+ GstPad *otherpad;
+ GstCaps *othercaps;
+ GstStructure *structure;
+
+ interlace = GST_INTERLACE (gst_pad_get_parent (pad));
+
+ otherpad =
+ (pad == interlace->srcpad) ? interlace->sinkpad : interlace->srcpad;
+
+ ret = gst_video_format_parse_caps (caps, &format, &width, &height);
+ gst_video_format_parse_caps_interlaced (caps, &interlaced);
+ ret &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
+
+ if (!ret)
+ goto error;
+
+ othercaps = gst_caps_copy (caps);
+
+ structure = gst_caps_get_structure (othercaps, 0);
+
+ if (pad == interlace->srcpad) {
+ gst_structure_set (structure,
+ "interlaced", G_TYPE_BOOLEAN, FALSE,
+ "framerate", GST_TYPE_FRACTION, fps_n * 2, fps_d, NULL);
+ } else {
+ gst_structure_set (structure,
+ "interlaced", G_TYPE_BOOLEAN, TRUE,
+ "framerate", GST_TYPE_FRACTION, fps_n, fps_d * 2, NULL);
+ }
+
+ ret = gst_pad_set_caps (otherpad, othercaps);
+ if (!ret)
+ goto error;
+
+ interlace->format = format;
+ interlace->width = width;
+ interlace->height = height;
+
+ if (pad == interlace->sinkpad) {
+ interlace->srccaps = gst_caps_ref (othercaps);
+ } else {
+ interlace->srccaps = gst_caps_ref (caps);
+ }
+
+error:
+ g_object_unref (interlace);
+
+ return ret;
+}
+
+static void
+copy_field (GstInterlace * interlace, GstBuffer * d, GstBuffer * s,
+ int field_index)
+{
+ int j;
+ guint8 *dest;
+ guint8 *src;
+ int width = interlace->width;
+ int height = interlace->height;
+
+ if (interlace->format == GST_VIDEO_FORMAT_I420 ||
+ interlace->format == GST_VIDEO_FORMAT_YV12) {
+ /* planar 4:2:0 */
+ for (j = field_index; j < height; j += 2) {
+ dest = GST_BUFFER_DATA (d) + j * width;
+ src = GST_BUFFER_DATA (s) + j * width;
+ memcpy (dest, src, width);
+ }
+ for (j = field_index; j < height / 2; j += 2) {
+ dest = GST_BUFFER_DATA (d) + width * height + j * width / 2;
+ src = GST_BUFFER_DATA (s) + width * height + j * width / 2;
+ memcpy (dest, src, width / 2);
+ }
+ for (j = field_index; j < height / 2; j += 2) {
+ dest =
+ GST_BUFFER_DATA (d) + width * height + width / 2 * height / 2 +
+ j * width / 2;
+ src =
+ GST_BUFFER_DATA (s) + width * height + width / 2 * height / 2 +
+ j * width / 2;
+ memcpy (dest, src, width / 2);
+ }
+ } else {
+ /* packed 4:2:2 */
+ for (j = field_index; j < height; j += 2) {
+ dest = GST_BUFFER_DATA (d) + j * width * 2;
+ src = GST_BUFFER_DATA (s) + j * width * 2;
+ memcpy (dest, src, width * 2);
+ }
+ }
+}
+
+
+static GstFlowReturn
+gst_interlace_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstInterlace *interlace = GST_INTERLACE (gst_pad_get_parent (pad));
+ GstFlowReturn ret;
+
+ GST_DEBUG ("Received buffer at %u:%02u:%02u:%09u",
+ (guint) (GST_BUFFER_TIMESTAMP (buffer) / (GST_SECOND * 60 * 60)),
+ (guint) ((GST_BUFFER_TIMESTAMP (buffer) / (GST_SECOND * 60)) % 60),
+ (guint) ((GST_BUFFER_TIMESTAMP (buffer) / GST_SECOND) % 60),
+ (guint) (GST_BUFFER_TIMESTAMP (buffer) % GST_SECOND));
+
+ GST_DEBUG ("duration %" GST_TIME_FORMAT " flags %04x %s %s %s",
+ GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)),
+ GST_BUFFER_FLAGS (buffer),
+ (GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_TFF) ? "tff" : "",
+ (GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_RFF) ? "rff" : "",
+ (GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_ONEFIELD) ? "onefield" :
+ "");
+
+ if (GST_BUFFER_FLAGS (buffer) & GST_BUFFER_FLAG_DISCONT) {
+ GST_ERROR ("discont");
+
+ }
+
+ if (interlace->stored_frame == NULL) {
+ interlace->stored_frame = buffer;
+ ret = GST_FLOW_OK;
+ } else {
+ GstBuffer *output_buffer;
+
+ output_buffer = gst_buffer_new_and_alloc (GST_BUFFER_SIZE (buffer));
+
+ copy_field (interlace, output_buffer, interlace->stored_frame,
+ !interlace->top_field_first);
+ copy_field (interlace, output_buffer, buffer, interlace->top_field_first);
+
+ GST_BUFFER_TIMESTAMP (output_buffer) =
+ GST_BUFFER_TIMESTAMP (interlace->stored_frame);
+ GST_BUFFER_DURATION (output_buffer) =
+ GST_BUFFER_DURATION (interlace->stored_frame) +
+ GST_BUFFER_DURATION (buffer);
+ gst_buffer_set_caps (output_buffer, interlace->srccaps);
+
+ if (interlace->top_field_first) {
+ GST_BUFFER_FLAG_SET (output_buffer, GST_VIDEO_BUFFER_TFF);
+ }
+
+ ret = gst_pad_push (interlace->srcpad, output_buffer);
+
+ gst_buffer_unref (buffer);
+ gst_buffer_unref (interlace->stored_frame);
+ interlace->stored_frame = NULL;
+ }
+
+ gst_object_unref (interlace);
+
+ return ret;
+}
+
+static void
+gst_interlace_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+ GstInterlace *interlace = GST_INTERLACE (object);
+
+ switch (prop_id) {
+ case PROP_TOP_FIELD_FIRST:
+ interlace->top_field_first = g_value_get_boolean (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_interlace_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec)
+{
+ GstInterlace *interlace = GST_INTERLACE (object);
+
+ switch (prop_id) {
+ case PROP_TOP_FIELD_FIRST:
+ g_value_set_boolean (value, interlace->top_field_first);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GstStateChangeReturn
+gst_interlace_change_state (GstElement * element, GstStateChange transition)
+{
+ //GstInterlace *interlace = GST_INTERLACE (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ //gst_interlace_reset (interlace);
+ break;
+ default:
+ break;
+ }
+
+ if (parent_class->change_state)
+ return parent_class->change_state (element, transition);
+
+ return GST_STATE_CHANGE_SUCCESS;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_interlace_debug, "interlace", 0,
+ "interlace element");
+
+ return gst_element_register (plugin, "interlace", GST_RANK_NONE,
+ GST_TYPE_INTERLACE);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "interlace",
+ "Create an interlaced video stream",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
projects / platform / upstream / gstreamer.git / commitdiff