path: root/sink/surfaceflingersink/gstsurfaceflingersink.c

/* GStreamer
 * Copyright (C) <2009> Prajnashi S <prajnashi@gmail.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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <signal.h>
#include <string.h>
#include <sys/time.h>
#include <stdlib.h>

#include <unistd.h>

#include "gstsurfaceflingersink.h"

GST_DEBUG_CATEGORY (gst_surfaceflinger_sink_debug);
#define GST_CAT_DEFAULT gst_surfaceflinger_sink_debug

/* elementfactory information */
static const GstElementDetails gst_surfaceflinger_sink_details =
GST_ELEMENT_DETAILS ("android's surface flinger sink",
    "Sink/Video",
    "A linux framebuffer videosink",
    "Prajnashi S <prajnashi@gmail.com>");

enum
{
  ARG_0,
  PROP_SURFACE,
};

static void gst_surfaceflinger_sink_base_init (gpointer g_class);
static void gst_surfaceflinger_sink_class_init (GstSurfaceFlingerSinkClass *
    klass);
static void gst_surfaceflinger_sink_get_times (GstBaseSink * basesink,
    GstBuffer * buffer, GstClockTime * start, GstClockTime * end);

static gboolean gst_surfaceflinger_sink_setcaps (GstBaseSink * bsink,
    GstCaps * caps);

static GstFlowReturn gst_surfaceflinger_sink_render (GstBaseSink * bsink,
    GstBuffer * buff);
static gboolean gst_surfaceflinger_sink_start (GstBaseSink * bsink);
static gboolean gst_surfaceflinger_sink_stop (GstBaseSink * bsink);

static void gst_surfaceflinger_sink_init (GstSurfaceFlingerSink * surfacesink);
static void gst_surfaceflinger_sink_finalize (GObject * object);
static void gst_surfaceflinger_sink_set_property (GObject * object,
    guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_surfaceflinger_sink_get_property (GObject * object,
    guint prop_id, GValue * value, GParamSpec * pspec);
static GstStateChangeReturn
gst_surfaceflinger_sink_change_state (GstElement * element,
    GstStateChange transition);

static GstCaps *gst_surfaceflinger_sink_getcaps (GstBaseSink * bsink);

static GstVideoSinkClass *parent_class = NULL;

/* TODO: Add support for other pixel formats */
#define GST_SURFACE_TEMPLATE_CAPS GST_VIDEO_CAPS_RGB_16

static void
gst_surfaceflinger_sink_base_init (gpointer g_class)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

  static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
      GST_PAD_SINK,
      GST_PAD_ALWAYS,
      GST_STATIC_CAPS (GST_SURFACE_TEMPLATE_CAPS)
      );

  gst_element_class_set_details (element_class,
      &gst_surfaceflinger_sink_details);
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&sink_template));
}


static void
gst_surfaceflinger_sink_get_times (GstBaseSink * basesink, GstBuffer * buffer,
    GstClockTime * start, GstClockTime * end)
{
  GstSurfaceFlingerSink *surfacesink;

  surfacesink = GST_SURFACEFLINGERSINK (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 (surfacesink->fps_n > 0) {
        *end = *start +
            gst_util_uint64_scale_int (GST_SECOND, surfacesink->fps_d,
            surfacesink->fps_n);
      }
    }
  }
}

static GstCaps *
gst_surfaceflinger_sink_getcaps (GstBaseSink * bsink)
{
  GstSurfaceFlingerSink *surfacesink;
  GstCaps *caps;

  surfacesink = GST_SURFACEFLINGERSINK (bsink);
  caps = gst_caps_from_string (GST_SURFACE_TEMPLATE_CAPS);

  return caps;
}

static gboolean
gst_surfaceflinger_sink_setcaps (GstBaseSink * bsink, GstCaps * vscapslist)
{
  GstSurfaceFlingerSink *surfacesink;
  GstStructure *structure;
  const GValue *fps;

  surfacesink = GST_SURFACEFLINGERSINK (bsink);

  GST_DEBUG_OBJECT (surfacesink, "caps after linked: %s",
      gst_caps_to_string (vscapslist));

  structure = gst_caps_get_structure (vscapslist, 0);

  surfacesink->pixel_format = VIDEO_FLINGER_RGB_565;
  fps = gst_structure_get_value (structure, "framerate");
  surfacesink->fps_n = gst_value_get_fraction_numerator (fps);
  surfacesink->fps_d = gst_value_get_fraction_denominator (fps);

  gst_structure_get_int (structure, "width", &surfacesink->width);
  gst_structure_get_int (structure, "height", &surfacesink->height);

  GST_DEBUG_OBJECT (surfacesink, "framerate=%d/%d", surfacesink->fps_n,
      surfacesink->fps_d);
  GST_DEBUG_OBJECT (surfacesink,
      "register framebuffers: width=%d,  height=%d,  pixel_format=%d",
      surfacesink->width, surfacesink->height, surfacesink->pixel_format);

  /* register frame buffer */
  if (videoflinger_device_register_framebuffers (surfacesink->videodev,
      surfacesink->width, surfacesink->height, surfacesink->pixel_format)
      != -1)
    return TRUE;

  GST_ERROR_OBJECT (surfacesink,
      "Unable to register framebuffer device with given caps");
  return FALSE;
}


static GstFlowReturn
gst_surfaceflinger_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
  GstSurfaceFlingerSink *surfacesink;

  surfacesink = GST_SURFACEFLINGERSINK (bsink);
  GST_DEBUG_OBJECT (surfacesink, "post buffer=%p, size=%d",
      GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));

  /* post frame buffer */
  videoflinger_device_post (surfacesink->videodev, GST_BUFFER_DATA (buf),
      GST_BUFFER_SIZE (buf));

  GST_DEBUG_OBJECT (surfacesink,
      "gst_surfaceflinger_sink_render return GST_FLOW_OK");
  return GST_FLOW_OK;
}

static gboolean
gst_surfaceflinger_sink_start (GstBaseSink * bsink)
{
  GstSurfaceFlingerSink *surfacesink;

  surfacesink = GST_SURFACEFLINGERSINK (bsink);

  /* release previous video device */
  if (surfacesink->videodev != NULL) {
    videoflinger_device_release (surfacesink->videodev);
    surfacesink->videodev = NULL;
  }

  /* create a new video device */
  GST_DEBUG_OBJECT (surfacesink, "ISurface = %p", surfacesink->isurface);
  surfacesink->videodev = videoflinger_device_create (surfacesink->isurface);
  if (surfacesink->videodev == NULL) {
    GST_ERROR_OBJECT (surfacesink, "Failed to create video device.");
    return FALSE;
  }

  GST_DEBUG_OBJECT (surfacesink, "gst_surfaceflinger_sink_start return TRUE");
  return TRUE;
}

static gboolean
gst_surfaceflinger_sink_stop (GstBaseSink * bsink)
{
  GstSurfaceFlingerSink *surfacesink;

  surfacesink = GST_SURFACEFLINGERSINK (bsink);

  if (surfacesink->videodev != NULL) {
    videoflinger_device_release (surfacesink->videodev);
    surfacesink->videodev = NULL;
  }

  return TRUE;
}

static void
gst_surfaceflinger_sink_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstSurfaceFlingerSink *surfacesink;

  surfacesink = GST_SURFACEFLINGERSINK (object);

  switch (prop_id) {
    case PROP_SURFACE:
      surfacesink->isurface = g_value_get_pointer (value);
      GST_DEBUG_OBJECT (surfacesink, "set property: ISurface = %p",
          surfacesink->isurface);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}


static void
gst_surfaceflinger_sink_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  GstSurfaceFlingerSink *surfacesink;

  surfacesink = GST_SURFACEFLINGERSINK (object);

  switch (prop_id) {
    case PROP_SURFACE:
      g_value_set_pointer (value, surfacesink->isurface);
      GST_DEBUG_OBJECT (surfacesink, "get property: ISurface = %p",
          surfacesink->isurface);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

/* TODO: delete me later */
static GstStateChangeReturn
gst_surfaceflinger_sink_change_state (GstElement * element,
    GstStateChange transition)
{
  GstSurfaceFlingerSink *surfacesink;
  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  g_return_val_if_fail (GST_IS_SURFACEFLINGERSINK (element),
      GST_STATE_CHANGE_FAILURE);
  surfacesink = GST_SURFACEFLINGERSINK (element);

  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  switch (transition) {
    default:
      break;
  }
  return ret;
}

static gboolean
plugin_init (GstPlugin * plugin)
{
  GST_DEBUG_CATEGORY_INIT (gst_surfaceflinger_sink_debug, "surfaceflingersink",
      0, "Video sink plugin");

  if (!gst_element_register (plugin, "surfaceflingersink", GST_RANK_NONE,
          GST_TYPE_SURFACEFLINGERSINK)) {
    return FALSE;
  }

  return TRUE;
}

static void
gst_surfaceflinger_sink_class_init (GstSurfaceFlingerSinkClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;
  GstBaseSinkClass *gstvs_class;

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;
  gstvs_class = (GstBaseSinkClass *) klass;

  parent_class = g_type_class_peek_parent (klass);

  gobject_class->set_property = gst_surfaceflinger_sink_set_property;
  gobject_class->get_property = gst_surfaceflinger_sink_get_property;
  gobject_class->finalize = gst_surfaceflinger_sink_finalize;

  gstelement_class->change_state =
      GST_DEBUG_FUNCPTR (gst_surfaceflinger_sink_change_state);

  g_object_class_install_property (gobject_class, PROP_SURFACE,
      g_param_spec_pointer ("surface", "Surface",
          "The pointer of ISurface interface", G_PARAM_READWRITE));

  gstvs_class->set_caps = GST_DEBUG_FUNCPTR (gst_surfaceflinger_sink_setcaps);
  gstvs_class->get_caps = GST_DEBUG_FUNCPTR (gst_surfaceflinger_sink_getcaps);
  gstvs_class->get_times =
      GST_DEBUG_FUNCPTR (gst_surfaceflinger_sink_get_times);
  gstvs_class->preroll = GST_DEBUG_FUNCPTR (gst_surfaceflinger_sink_render);
  gstvs_class->render = GST_DEBUG_FUNCPTR (gst_surfaceflinger_sink_render);
  gstvs_class->start = GST_DEBUG_FUNCPTR (gst_surfaceflinger_sink_start);
  gstvs_class->stop = GST_DEBUG_FUNCPTR (gst_surfaceflinger_sink_stop);
}

static void
gst_surfaceflinger_sink_init (GstSurfaceFlingerSink * surfacesink)
{
  surfacesink->isurface = NULL;
  surfacesink->videodev = NULL;

  surfacesink->fps_n = 0;
  surfacesink->fps_d = 1;
  surfacesink->width = 320;
  surfacesink->height = 240;
  surfacesink->pixel_format = -1;
}

static void
gst_surfaceflinger_sink_finalize (GObject * object)
{
  GstSurfaceFlingerSink *surfacesink = GST_SURFACEFLINGERSINK (object);

  G_OBJECT_CLASS (parent_class)->finalize (object);
}

GType
gst_surfaceflinger_sink_get_type (void)
{
  static GType surfacesink_type = 0;

  if (!surfacesink_type) {
    static const GTypeInfo surfacesink_info = {
      sizeof (GstSurfaceFlingerSinkClass),
      gst_surfaceflinger_sink_base_init,
      NULL,
      (GClassInitFunc) gst_surfaceflinger_sink_class_init,
      NULL,
      NULL,
      sizeof (GstSurfaceFlingerSink),
      0,
      (GInstanceInitFunc) gst_surfaceflinger_sink_init,
    };

    surfacesink_type =
        g_type_register_static (GST_TYPE_BASE_SINK, "GstSurfaceFlingerSink",
        &surfacesink_info, 0);
  }
  return surfacesink_type;
}


GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
    "surfaceflingersink", "android surface flinger sink",
    plugin_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")