diff options
Diffstat (limited to 'sys/winscreencap/gstgdiscreencapsrc.c')
| -rw-r--r-- | sys/winscreencap/gstgdiscreencapsrc.c | 537 |
1 files changed, 537 insertions, 0 deletions
diff --git a/sys/winscreencap/gstgdiscreencapsrc.c b/sys/winscreencap/gstgdiscreencapsrc.c new file mode 100644 index 00000000..86a3d576 --- /dev/null +++ b/sys/winscreencap/gstgdiscreencapsrc.c @@ -0,0 +1,537 @@ +/* GStreamer + * Copyright (C) 2007 Haakon Sporsheim <hakon.sporsheim@tandberg.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 "gstgdiscreencapsrc.h" +#include <gst/video/video.h> + +GST_DEBUG_CATEGORY_STATIC (gdiscreencapsrc_debug); + +static const GstElementDetails gst_gdiscreencapsrc_details = { + "GDI screen capture source", + "Source/Video", + "Captures screen", + "Haakon Sporsheim <hakon.sporsheim@tandberg.com>" +}; + +static GstStaticPadTemplate src_template = +GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, + GST_STATIC_CAPS (GST_VIDEO_CAPS_BGR)); + +GST_BOILERPLATE (GstGDIScreenCapSrc, gst_gdiscreencapsrc, + GstPushSrc, GST_TYPE_PUSH_SRC); + +enum +{ + PROP_0, + PROP_MONITOR, + PROP_SHOW_CURSOR, + PROP_X_POS, + PROP_Y_POS, + PROP_WIDTH, + PROP_HEIGHT +}; + +/* Fwd. decl. */ +static void gst_gdiscreencapsrc_dispose (GObject * object); +static void gst_gdiscreencapsrc_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_gdiscreencapsrc_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); + +static void gst_gdiscreencapsrc_fixate (GstPad * pad, GstCaps * caps); +static gboolean gst_gdiscreencapsrc_set_caps (GstBaseSrc * bsrc, + GstCaps * caps); +static GstCaps *gst_gdiscreencapsrc_get_caps (GstBaseSrc * bsrc); +static gboolean gst_gdiscreencapsrc_start (GstBaseSrc * bsrc); +static gboolean gst_gdiscreencapsrc_stop (GstBaseSrc * bsrc); + +static void gst_gdiscreencapsrc_get_times (GstBaseSrc * basesrc, + GstBuffer * buffer, GstClockTime * start, GstClockTime * end); +static GstFlowReturn gst_gdiscreencapsrc_create (GstPushSrc * src, + GstBuffer ** buf); + +static gboolean gst_gdiscreencapsrc_screen_capture (GstGDIScreenCapSrc * src, + GstBuffer * buf); + +/* Implementation. */ +static void +gst_gdiscreencapsrc_base_init (gpointer klass) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (klass); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&src_template)); + gst_element_class_set_details (element_class, &gst_gdiscreencapsrc_details); +} + +static void +gst_gdiscreencapsrc_class_init (GstGDIScreenCapSrcClass * klass) +{ + GObjectClass *go_class; + GstBaseSrcClass *bs_class; + GstPushSrcClass *ps_class; + + go_class = (GObjectClass *) klass; + bs_class = (GstBaseSrcClass *) klass; + ps_class = (GstPushSrcClass *) klass; + + go_class->dispose = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_dispose); + go_class->set_property = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_set_property); + go_class->get_property = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_get_property); + + bs_class->get_times = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_get_times); + bs_class->get_caps = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_get_caps); + bs_class->set_caps = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_set_caps); + bs_class->start = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_start); + bs_class->stop = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_stop); + + ps_class->create = GST_DEBUG_FUNCPTR (gst_gdiscreencapsrc_create); + + g_object_class_install_property (go_class, PROP_MONITOR, + g_param_spec_int ("monitor", + "Monitor", "Which monitor to use (0 = 1st monitor and default)", + 0, G_MAXINT, 0, G_PARAM_READWRITE)); + + g_object_class_install_property (go_class, PROP_SHOW_CURSOR, + g_param_spec_boolean ("cursor", "Show mouse cursor", + "Whether to show mouse cursor (default off)", + FALSE, G_PARAM_READWRITE)); + + g_object_class_install_property (go_class, PROP_X_POS, + g_param_spec_int ("x", "X", + "Horizontal coordinate of top left corner for the screen capture " + "area", 0, G_MAXINT, 0, G_PARAM_READWRITE)); + g_object_class_install_property (go_class, PROP_Y_POS, + g_param_spec_int ("y", "Y", + "Vertical coordinate of top left corner for the screen capture " + "area", 0, G_MAXINT, 0, G_PARAM_READWRITE)); + + g_object_class_install_property (go_class, PROP_WIDTH, + g_param_spec_int ("width", "Width", + "Width of screen capture area (0 = maximum)", + 0, G_MAXINT, 0, G_PARAM_READWRITE)); + g_object_class_install_property (go_class, PROP_HEIGHT, + g_param_spec_int ("height", "Height", + "Height of screen capture area (0 = maximum)", + 0, G_MAXINT, 0, G_PARAM_READWRITE)); + + GST_DEBUG_CATEGORY_INIT (gdiscreencapsrc_debug, + "gdiscreencapsrc", 0, "GDI screen capture source"); +} + +static void +gst_gdiscreencapsrc_init (GstGDIScreenCapSrc * src, + GstGDIScreenCapSrcClass * klass) +{ + /* Set src element inital values... */ + GstPad *src_pad = GST_BASE_SRC_PAD (src); + gst_pad_set_fixatecaps_function (src_pad, gst_gdiscreencapsrc_fixate); + + src->frames = 0; + src->dibMem = NULL; + src->hBitmap = (HBITMAP) INVALID_HANDLE_VALUE; + src->memDC = (HDC) INVALID_HANDLE_VALUE; + src->capture_x = 0; + src->capture_y = 0; + src->capture_w = 0; + src->capture_h = 0; + + src->monitor = 0; + src->show_cursor = FALSE; + + gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME); + gst_base_src_set_live (GST_BASE_SRC (src), TRUE); +} + +static void +gst_gdiscreencapsrc_dispose (GObject * object) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (object); + + if (src->hBitmap != INVALID_HANDLE_VALUE) + DeleteObject (src->hBitmap); + + if (src->memDC != INVALID_HANDLE_VALUE) + DeleteDC (src->memDC); + + src->hBitmap = (HBITMAP) INVALID_HANDLE_VALUE; + src->memDC = (HDC) INVALID_HANDLE_VALUE; + src->dibMem = NULL; +} + +static void +gst_gdiscreencapsrc_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (object); + + switch (prop_id) { + case PROP_MONITOR: + if (g_value_get_int (value) >= GetSystemMetrics (SM_CMONITORS)) { + G_OBJECT_WARN_INVALID_PSPEC (object, "Monitor", prop_id, pspec); + break; + } + src->monitor = g_value_get_int (value); + break; + case PROP_SHOW_CURSOR: + src->show_cursor = g_value_get_boolean (value); + break; + case PROP_X_POS: + src->capture_x = g_value_get_int (value); + break; + case PROP_Y_POS: + src->capture_y = g_value_get_int (value); + break; + case PROP_WIDTH: + src->capture_w = g_value_get_int (value); + break; + case PROP_HEIGHT: + src->capture_h = g_value_get_int (value); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + }; +} + +static void +gst_gdiscreencapsrc_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (object); + + switch (prop_id) { + case PROP_MONITOR: + g_value_set_int (value, src->monitor); + break; + case PROP_SHOW_CURSOR: + g_value_set_boolean (value, src->show_cursor); + break; + case PROP_X_POS: + g_value_set_int (value, src->capture_x); + break; + case PROP_Y_POS: + g_value_set_int (value, src->capture_y); + break; + case PROP_WIDTH: + g_value_set_int (value, src->capture_w); + break; + case PROP_HEIGHT: + g_value_set_int (value, src->capture_h); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + }; +} + +static void +gst_gdiscreencapsrc_fixate (GstPad * pad, GstCaps * caps) +{ + GstStructure *structure; + + structure = gst_caps_get_structure (caps, 0); + + gst_structure_fixate_field_nearest_int (structure, "width", 640); + gst_structure_fixate_field_nearest_int (structure, "height", 480); + gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1); +} + +static gboolean +gst_gdiscreencapsrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (bsrc); + HWND capture; + HDC device; + GstStructure *structure; + const GValue *framerate; + gint red_mask, green_mask, blue_mask; + gint bpp; + + structure = gst_caps_get_structure (caps, 0); + + gst_structure_get_int (structure, "red_mask", &red_mask); + gst_structure_get_int (structure, "green_mask", &green_mask); + gst_structure_get_int (structure, "blue_mask", &blue_mask); + if (blue_mask != GST_VIDEO_BYTE1_MASK_24_INT || + green_mask != GST_VIDEO_BYTE2_MASK_24_INT || + red_mask != GST_VIDEO_BYTE3_MASK_24_INT) { + GST_ERROR ("Wrong red_,green_,blue_ mask provided. " + "We only support RGB and BGR"); + + return FALSE; + } + + gst_structure_get_int (structure, "bpp", &bpp); + if (bpp != 24) { + GST_ERROR ("Wrong bpp provided %d. We only support 24 bpp", bpp); + return FALSE; + } + + src->src_rect = src->screen_rect; + if (src->capture_w && src->capture_h) { + src->src_rect.left += src->capture_x; + src->src_rect.top += src->capture_y; + src->src_rect.right = src->src_rect.left + src->capture_w; + src->src_rect.bottom = src->src_rect.top + src->capture_h; + } + + if (framerate = gst_structure_get_value (structure, "framerate")) { + src->rate_numerator = gst_value_get_fraction_numerator (framerate); + src->rate_denominator = gst_value_get_fraction_denominator (framerate); + } + + src->info.bmiHeader.biSize = sizeof (BITMAPINFOHEADER); + src->info.bmiHeader.biWidth = src->src_rect.right - src->src_rect.left; + src->info.bmiHeader.biHeight = src->src_rect.top - src->src_rect.bottom; + src->info.bmiHeader.biPlanes = 1; + src->info.bmiHeader.biBitCount = 24; + src->info.bmiHeader.biCompression = BI_RGB; + src->info.bmiHeader.biSizeImage = 0; + src->info.bmiHeader.biXPelsPerMeter = 0; + src->info.bmiHeader.biYPelsPerMeter = 0; + src->info.bmiHeader.biClrUsed = 0; + src->info.bmiHeader.biClrImportant = 0; + + /* Cleanup first */ + if (src->hBitmap != INVALID_HANDLE_VALUE) + DeleteObject (src->hBitmap); + + if (src->memDC != INVALID_HANDLE_VALUE) + DeleteDC (src->memDC); + + /* Allocate */ + capture = GetDesktopWindow (); + device = GetDC (capture); + src->hBitmap = CreateDIBSection (device, &(src->info), DIB_RGB_COLORS, + (void **) &(src->dibMem), 0, 0); + src->memDC = CreateCompatibleDC (device); + SelectObject (src->memDC, src->hBitmap); + ReleaseDC (capture, device); + + GST_DEBUG_OBJECT (src, "size %dx%d, %d/%d fps", + src->info.bmiHeader.biWidth, + -src->info.bmiHeader.biHeight, + src->rate_numerator, src->rate_denominator); + + return TRUE; +} + +static GstCaps * +gst_gdiscreencapsrc_get_caps (GstBaseSrc * bsrc) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (bsrc); + RECT rect_dst; + + src->screen_rect = rect_dst = gst_win32_get_monitor_rect (src->monitor); + + if (src->capture_w && src->capture_h && + src->capture_x + src->capture_w < rect_dst.right - rect_dst.left && + src->capture_y + src->capture_h < rect_dst.bottom - rect_dst.top) { + rect_dst.left = src->capture_x; + rect_dst.top = src->capture_y; + rect_dst.right = src->capture_x + src->capture_w; + rect_dst.bottom = src->capture_y + src->capture_h; + } else { + /* Default values. */ + src->capture_x = src->capture_y = 0; + src->capture_w = src->capture_h = 0; + } + + GST_DEBUG ("width = %d, height=%d", + rect_dst.right - rect_dst.left, rect_dst.bottom - rect_dst.top); + + return gst_caps_new_simple ("video/x-raw-rgb", + "bpp", G_TYPE_INT, 24, + "depth", G_TYPE_INT, 24, + "endianness", G_TYPE_INT, G_BIG_ENDIAN, + "red_mask", G_TYPE_INT, GST_VIDEO_BYTE3_MASK_24_INT, + "green_mask", G_TYPE_INT, GST_VIDEO_BYTE2_MASK_24_INT, + "blue_mask", G_TYPE_INT, GST_VIDEO_BYTE1_MASK_24_INT, + "width", G_TYPE_INT, rect_dst.right - rect_dst.left, + "height", G_TYPE_INT, rect_dst.bottom - rect_dst.top, + "framerate", GST_TYPE_FRACTION_RANGE, 1, G_MAXINT, G_MAXINT, 1, NULL); +} + +static gboolean +gst_gdiscreencapsrc_start (GstBaseSrc * bsrc) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (bsrc); + + src->frames = 0; + + return TRUE; +} + +static gboolean +gst_gdiscreencapsrc_stop (GstBaseSrc * bsrc) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (bsrc); + + src->frames = 0; + + return TRUE; +} + +static void +gst_gdiscreencapsrc_get_times (GstBaseSrc * basesrc, GstBuffer * buffer, + GstClockTime * start, GstClockTime * end) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (basesrc); + GstClockTime timestamp; + + timestamp = GST_BUFFER_TIMESTAMP (buffer); + + if (GST_CLOCK_TIME_IS_VALID (timestamp)) { + GstClockTime duration = GST_BUFFER_DURATION (buffer); + + if (GST_CLOCK_TIME_IS_VALID (duration)) + *end = timestamp + duration; + *start = timestamp; + } +} + +static GstFlowReturn +gst_gdiscreencapsrc_create (GstPushSrc * push_src, GstBuffer ** buf) +{ + GstGDIScreenCapSrc *src = GST_GDISCREENCAPSRC (push_src); + GstBuffer *new_buf; + GstFlowReturn res; + gint new_buf_size; + GstClock *clock; + GstClockTime time; + GstClockTime base_time; + + if (G_UNLIKELY (!src->info.bmiHeader.biWidth || + !src->info.bmiHeader.biHeight)) { + GST_ELEMENT_ERROR (src, CORE, NEGOTIATION, (NULL), + ("format wasn't negotiated before create function")); + return GST_FLOW_NOT_NEGOTIATED; + } else if (G_UNLIKELY (src->rate_numerator == 0 && src->frames == 1)) { + GST_DEBUG_OBJECT (src, "eos: 0 framerate, frame %d", (gint) src->frames); + return GST_FLOW_UNEXPECTED; + } + + new_buf_size = GST_ROUND_UP_4 (src->info.bmiHeader.biWidth * 3) * + (-src->info.bmiHeader.biHeight); + + GST_LOG_OBJECT (src, + "creating buffer of %lu bytes with %dx%d image for frame %d", + new_buf_size, src->info.bmiHeader.biWidth, + -src->info.bmiHeader.biHeight, (gint) src->frames); + + res = + gst_pad_alloc_buffer_and_set_caps (GST_BASE_SRC_PAD (src), + GST_BUFFER_OFFSET_NONE, new_buf_size, + GST_PAD_CAPS (GST_BASE_SRC_PAD (push_src)), &new_buf); + if (res != GST_FLOW_OK) { + GST_DEBUG_OBJECT (src, "could not allocate buffer, reason %s", + gst_flow_get_name (res)); + return res; + } + + clock = gst_element_get_clock (GST_ELEMENT (src)); + if (clock) { + /* Calculate sync time. */ + GstClockTime frame_time = + gst_util_uint64_scale_int (src->frames * GST_SECOND, + src->rate_denominator, src->rate_numerator); + + time = gst_clock_get_time (clock); + base_time = gst_element_get_base_time (GST_ELEMENT (src)); + GST_BUFFER_TIMESTAMP (new_buf) = MAX (time - base_time, frame_time); + } else { + GST_BUFFER_TIMESTAMP (new_buf) = GST_CLOCK_TIME_NONE; + } + + /* Do screen capture and put it into buffer... */ + gst_gdiscreencapsrc_screen_capture (src, new_buf); + + if (src->rate_numerator) { + GST_BUFFER_DURATION (new_buf) = + gst_util_uint64_scale_int (GST_SECOND, + src->rate_denominator, src->rate_numerator); + if (clock) { + GST_BUFFER_DURATION (new_buf) = + MAX (GST_BUFFER_DURATION (new_buf), + gst_clock_get_time (clock) - time); + } + } else { + /* NONE means forever */ + GST_BUFFER_DURATION (new_buf) = GST_CLOCK_TIME_NONE; + } + + GST_BUFFER_OFFSET (new_buf) = src->frames; + src->frames++; + GST_BUFFER_OFFSET_END (new_buf) = src->frames; + + gst_object_unref (clock); + + *buf = new_buf; + return GST_FLOW_OK; +} + +static gboolean +gst_gdiscreencapsrc_screen_capture (GstGDIScreenCapSrc * src, GstBuffer * buf) +{ + HWND capture; + HDC winDC; + gint height, width; + + if (G_UNLIKELY (!src->hBitmap || !src->dibMem)) + return FALSE; + + width = src->info.bmiHeader.biWidth; + height = -src->info.bmiHeader.biHeight; + + /* Capture screen */ + capture = GetDesktopWindow (); + winDC = GetWindowDC (capture); + + BitBlt (src->memDC, 0, 0, width, height, + winDC, src->src_rect.left, src->src_rect.top, SRCCOPY); + + ReleaseDC (capture, winDC); + + /* Capture mouse cursor */ + if (src->show_cursor) { + CURSORINFO ci; + + ci.cbSize = sizeof (CURSORINFO); + GetCursorInfo (&ci); + if (ci.flags & CURSOR_SHOWING) { + ICONINFO ii; + GetIconInfo (ci.hCursor, &ii); + + DrawIconEx (src->memDC, + ci.ptScreenPos.x - src->src_rect.left - ii.xHotspot, + ci.ptScreenPos.y - src->src_rect.top - ii.yHotspot, ci.hCursor, 0, 0, + 0, NULL, DI_DEFAULTSIZE | DI_NORMAL | DI_COMPAT); + } + } + + /* Copy DC bits to GST buffer */ + memcpy (GST_BUFFER_DATA (buf), src->dibMem, GST_BUFFER_SIZE (buf)); + + return TRUE; +} |