+/* GStreamer fbdev plugin
+ * Copyright (C) 2007 Sean D'Epagnier <sean@depagnier.com>
+ *
+ * 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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/* currently the driver does not switch modes, instead uses current mode.
+ the video is centered and cropped if needed to fit onscreen.
+ Whatever bitdepth is set is used, and tested to work for 16, 24, 32 bits
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <signal.h>
+#include <string.h>
+#include <sys/time.h>
+#include <stdlib.h>
+
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <stdint.h>
+
+#include "gstfbdevsink.h"
+
+enum
+{
+ ARG_0,
+ ARG_DEVICE
+};
+
+#if 0
+static void gst_fbdevsink_get_times (GstBaseSink * basesink,
+ GstBuffer * buffer, GstClockTime * start, GstClockTime * end);
+#endif
+
+static GstFlowReturn gst_fbdevsink_show_frame (GstVideoSink * videosink,
+ GstBuffer * buff);
+
+static gboolean gst_fbdevsink_start (GstBaseSink * bsink);
+static gboolean gst_fbdevsink_stop (GstBaseSink * bsink);
+
+static GstCaps *gst_fbdevsink_getcaps (GstBaseSink * bsink, GstCaps * filter);
+static gboolean gst_fbdevsink_setcaps (GstBaseSink * bsink, GstCaps * caps);
+
+static void gst_fbdevsink_finalize (GObject * object);
+static void gst_fbdevsink_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_fbdevsink_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+static GstStateChangeReturn gst_fbdevsink_change_state (GstElement * element,
+ GstStateChange transition);
+
+#define VIDEO_CAPS "{ RGB, BGR, BGRx, xBGR, RGB, RGBx, xRGB, RGB15, RGB16 }"
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (VIDEO_CAPS))
+ );
+
+#define parent_class gst_fbdevsink_parent_class
+G_DEFINE_TYPE (GstFBDEVSink, gst_fbdevsink, GST_TYPE_VIDEO_SINK);
+
+static void
+gst_fbdevsink_init (GstFBDEVSink * fbdevsink)
+{
+ /* nothing to do here yet */
+}
+
+#if 0
+static void
+gst_fbdevsink_get_times (GstBaseSink * basesink, GstBuffer * buffer,
+ GstClockTime * start, GstClockTime * end)
+{
+ GstFBDEVSink *fbdevsink;
+
+ fbdevsink = GST_FBDEVSINK (basesink);
+
+ if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
+ *start = GST_BUFFER_TIMESTAMP (buffer);
+ if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
+ *end = *start + GST_BUFFER_DURATION (buffer);
+ } else {
+ if (fbdevsink->fps_n > 0) {
+ *end = *start +
+ gst_util_uint64_scale_int (GST_SECOND, fbdevsink->fps_d,
+ fbdevsink->fps_n);
+ }
+ }
+ }
+}
+#endif
+
+static GstCaps *
+gst_fbdevsink_getcaps (GstBaseSink * bsink, GstCaps * filter)
+{
+ GstFBDEVSink *fbdevsink;
+ GstVideoFormat format;
+ GstCaps *caps;
+ uint32_t rmask;
+ uint32_t gmask;
+ uint32_t bmask;
+ uint32_t tmask;
+ int endianness, depth, bpp;
+
+ fbdevsink = GST_FBDEVSINK (bsink);
+
+ caps = gst_static_pad_template_get_caps (&sink_template);
+
+ /* FIXME: locking */
+ if (!fbdevsink->framebuffer)
+ goto done;
+
+ bpp = fbdevsink->varinfo.bits_per_pixel;
+
+ rmask = ((1 << fbdevsink->varinfo.red.length) - 1)
+ << fbdevsink->varinfo.red.offset;
+ gmask = ((1 << fbdevsink->varinfo.green.length) - 1)
+ << fbdevsink->varinfo.green.offset;
+ bmask = ((1 << fbdevsink->varinfo.blue.length) - 1)
+ << fbdevsink->varinfo.blue.offset;
+ tmask = ((1 << fbdevsink->varinfo.transp.length) - 1)
+ << fbdevsink->varinfo.transp.offset;
+
+ depth = fbdevsink->varinfo.red.length + fbdevsink->varinfo.green.length
+ + fbdevsink->varinfo.blue.length;
+
+ switch (fbdevsink->varinfo.bits_per_pixel) {
+ case 32:
+ /* swap endianness of masks */
+ rmask = GUINT32_SWAP_LE_BE (rmask);
+ gmask = GUINT32_SWAP_LE_BE (gmask);
+ bmask = GUINT32_SWAP_LE_BE (bmask);
+ tmask = GUINT32_SWAP_LE_BE (tmask);
+ depth += fbdevsink->varinfo.transp.length;
+ endianness = G_BIG_ENDIAN;
+ break;
+ case 24:{
+ /* swap red and blue masks */
+ tmask = rmask;
+ rmask = bmask;
+ bmask = tmask;
+ tmask = 0;
+ endianness = G_BIG_ENDIAN;
+ break;
+ }
+ case 15:
+ case 16:
+ tmask = 0;
+ endianness = G_LITTLE_ENDIAN;
+ break;
+ default:
+ goto unsupported_bpp;
+ }
+
+ format = gst_video_format_from_masks (depth, bpp, endianness, rmask, gmask,
+ bmask, tmask);
+
+ if (format == GST_VIDEO_FORMAT_UNKNOWN)
+ goto unknown_format;
+
+ caps = gst_caps_make_writable (caps);
+ gst_caps_set_simple (caps, "format", G_TYPE_STRING,
+ gst_video_format_to_string (format), NULL);
+
+done:
+
+ if (filter != NULL) {
+ GstCaps *icaps;
+
+ icaps = gst_caps_intersect (caps, filter);
+ gst_caps_unref (caps);
+ caps = icaps;
+ }
+
+ return caps;
+
+/* ERRORS */
+unsupported_bpp:
+ {
+ GST_WARNING_OBJECT (bsink, "unsupported bit depth: %d", bpp);
+ return NULL;
+ }
+unknown_format:
+ {
+ GST_WARNING_OBJECT (bsink, "could not map fbdev format to GstVideoFormat: "
+ "depth=%u, bpp=%u, endianness=%u, rmask=0x%08x, gmask=0x%08x, "
+ "bmask=0x%08x, tmask=0x%08x", depth, bpp, endianness, rmask, gmask,
+ bmask, tmask);
+ return NULL;
+ }
+}
+
+static gboolean
+gst_fbdevsink_setcaps (GstBaseSink * bsink, GstCaps * vscapslist)
+{
+ GstFBDEVSink *fbdevsink;
+ GstStructure *structure;
+ const GValue *fps;
+
+ fbdevsink = GST_FBDEVSINK (bsink);
+
+ structure = gst_caps_get_structure (vscapslist, 0);
+
+ fps = gst_structure_get_value (structure, "framerate");
+ fbdevsink->fps_n = gst_value_get_fraction_numerator (fps);
+ fbdevsink->fps_d = gst_value_get_fraction_denominator (fps);
+
+ gst_structure_get_int (structure, "width", &fbdevsink->width);
+ gst_structure_get_int (structure, "height", &fbdevsink->height);
+
+ /* calculate centering and scanlengths for the video */
+ fbdevsink->bytespp = fbdevsink->fixinfo.line_length / fbdevsink->varinfo.xres;
+
+ fbdevsink->cx = ((int) fbdevsink->varinfo.xres - fbdevsink->width) / 2;
+ if (fbdevsink->cx < 0)
+ fbdevsink->cx = 0;
+
+ fbdevsink->cy = ((int) fbdevsink->varinfo.yres - fbdevsink->height) / 2;
+ if (fbdevsink->cy < 0)
+ fbdevsink->cy = 0;
+
+ fbdevsink->linelen = fbdevsink->width * fbdevsink->bytespp;
+ if (fbdevsink->linelen > fbdevsink->fixinfo.line_length)
+ fbdevsink->linelen = fbdevsink->fixinfo.line_length;
+
+ fbdevsink->lines = fbdevsink->height;
+ if (fbdevsink->lines > fbdevsink->varinfo.yres)
+ fbdevsink->lines = fbdevsink->varinfo.yres;
+
+ return TRUE;
+}
+
+
+static GstFlowReturn
+gst_fbdevsink_show_frame (GstVideoSink * videosink, GstBuffer * buf)
+{
+
+ GstFBDEVSink *fbdevsink;
+ GstMapInfo map;
+ int i;
+
+ fbdevsink = GST_FBDEVSINK (videosink);
+
+ /* optimization could remove this memcpy by allocating the buffer
+ in framebuffer memory, but would only work when xres matches
+ the video width */
+ if (!gst_buffer_map (buf, &map, GST_MAP_READ))
+ return GST_FLOW_ERROR;
+
+ for (i = 0; i < fbdevsink->lines; i++) {
+ memcpy (fbdevsink->framebuffer
+ + (i + fbdevsink->cy) * fbdevsink->fixinfo.line_length
+ + fbdevsink->cx * fbdevsink->bytespp,
+ map.data + i * fbdevsink->width * fbdevsink->bytespp,
+ fbdevsink->linelen);
+ }
+
+ gst_buffer_unmap (buf, &map);
+
+ return GST_FLOW_OK;
+}
+
+static gboolean
+gst_fbdevsink_start (GstBaseSink * bsink)
+{
+ GstFBDEVSink *fbdevsink;
+
+ fbdevsink = GST_FBDEVSINK (bsink);
+
+ if (!fbdevsink->device) {
+ fbdevsink->device = g_strdup ("/dev/fb0");
+ }
+
+ fbdevsink->fd = open (fbdevsink->device, O_RDWR);
+
+ if (fbdevsink->fd == -1)
+ return FALSE;
+
+ /* get the fixed screen info */
+ if (ioctl (fbdevsink->fd, FBIOGET_FSCREENINFO, &fbdevsink->fixinfo))
+ return FALSE;
+
+ /* get the variable screen info */
+ if (ioctl (fbdevsink->fd, FBIOGET_VSCREENINFO, &fbdevsink->varinfo))
+ return FALSE;
+
+ /* map the framebuffer */
+ fbdevsink->framebuffer = mmap (0, fbdevsink->fixinfo.smem_len,
+ PROT_WRITE, MAP_SHARED, fbdevsink->fd, 0);
+ if (fbdevsink->framebuffer == MAP_FAILED)
+ return FALSE;
+
+ return TRUE;
+}
+
+static gboolean
+gst_fbdevsink_stop (GstBaseSink * bsink)
+{
+ GstFBDEVSink *fbdevsink;
+
+ fbdevsink = GST_FBDEVSINK (bsink);
+
+ if (munmap (fbdevsink->framebuffer, fbdevsink->fixinfo.smem_len))
+ return FALSE;
+
+ if (close (fbdevsink->fd))
+ return FALSE;
+
+
+ return TRUE;
+}
+
+static void
+gst_fbdevsink_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstFBDEVSink *fbdevsink;
+
+ fbdevsink = GST_FBDEVSINK (object);
+
+ switch (prop_id) {
+ case ARG_DEVICE:{
+ g_free (fbdevsink->device);
+ fbdevsink->device = g_value_dup_string (value);
+ break;
+ }
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static void
+gst_fbdevsink_get_property (GObject * object, guint prop_id, GValue * value,
+ GParamSpec * pspec)
+{
+ GstFBDEVSink *fbdevsink;
+
+ fbdevsink = GST_FBDEVSINK (object);
+
+ switch (prop_id) {
+ case ARG_DEVICE:{
+ g_value_set_string (value, fbdevsink->device);
+ break;
+ }
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GstStateChangeReturn
+gst_fbdevsink_change_state (GstElement * element, GstStateChange transition)
+{
+ GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+
+ g_return_val_if_fail (GST_IS_FBDEVSINK (element), GST_STATE_CHANGE_FAILURE);
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ default:
+ break;
+ }
+ return ret;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ if (!gst_element_register (plugin, "fbdevsink", GST_RANK_NONE,
+ GST_TYPE_FBDEVSINK))
+ return FALSE;
+
+ return TRUE;
+}
+
+static void
+gst_fbdevsink_class_init (GstFBDEVSinkClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+ GstBaseSinkClass *basesink_class;
+ GstVideoSinkClass *videosink_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+ basesink_class = (GstBaseSinkClass *) klass;
+ videosink_class = (GstVideoSinkClass *) klass;
+
+ gobject_class->set_property = gst_fbdevsink_set_property;
+ gobject_class->get_property = gst_fbdevsink_get_property;
+ gobject_class->finalize = gst_fbdevsink_finalize;
+
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_fbdevsink_change_state);
+
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DEVICE,
+ g_param_spec_string ("device", "device",
+ "The framebuffer device eg: /dev/fb0", NULL, G_PARAM_READWRITE));
+
+ basesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_fbdevsink_setcaps);
+ basesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_fbdevsink_getcaps);
+#if 0
+ basesink_class->get_times = GST_DEBUG_FUNCPTR (gst_fbdevsink_get_times);
+#endif
+ basesink_class->start = GST_DEBUG_FUNCPTR (gst_fbdevsink_start);
+ basesink_class->stop = GST_DEBUG_FUNCPTR (gst_fbdevsink_stop);
+
+ videosink_class->show_frame = GST_DEBUG_FUNCPTR (gst_fbdevsink_show_frame);
+
+ gst_element_class_set_static_metadata (gstelement_class, "fbdev video sink",
+ "Sink/Video", "Linux framebuffer videosink",
+ "Sean D'Epagnier <sean@depagnier.com>");
+
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&sink_template));
+}
+
+static void
+gst_fbdevsink_finalize (GObject * object)
+{
+ GstFBDEVSink *fbdevsink = GST_FBDEVSINK (object);
+
+ g_free (fbdevsink->device);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ fbdevsink,
+ "Linux framebuffer video sink",
+ plugin_init, VERSION, "LGPL", "gst-fbdevsink", "http://ao2.it")
projects / gst-am7xxxsink.git / commitdiff