--- /dev/null
+/* GStreamer
+ * Copyright (C) 2007 Michael Smith <msmith@xiph.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.
+ */
+
+/*
+ * This is a decoder for the VMWare VMnc video codec, which VMWare uses for
+ * recording * of virtual machine instances.
+ * It's essentially a serialisation of RFB (the VNC protocol)
+ * 'FramebufferUpdate' messages, with some special encoding-types for VMnc
+ * extensions. There's some documentation (with fixes from VMWare employees) at:
+ * http://wiki.multimedia.cx/index.php?title=VMware_Video
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+#include <string.h>
+
+#define GST_CAT_DEFAULT vmnc_debug
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
+
+#define GST_TYPE_VMNC_DEC \
+ (gst_vmnc_dec_get_type())
+#define GST_VMNC_DEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VMNC_DEC,GstVMncDec))
+
+#define RFB_GET_UINT32(ptr) GUINT32_FROM_BE (*(guint32 *)(ptr))
+#define RFB_GET_UINT16(ptr) GUINT16_FROM_BE (*(guint16 *)(ptr))
+#define RFB_GET_UINT8(ptr) (*(guint8 *)(ptr))
+
+enum
+{
+ ARG_0,
+};
+
+#define MAKE_TYPE(a,b,c,d) ((a<<24)|(b<<16)|(c<<8)|d)
+enum
+{
+ TYPE_RAW = 0,
+ TYPE_COPY = 1,
+ TYPE_RRE = 2,
+ TYPE_CoRRE = 4,
+ TYPE_HEXTILE = 5,
+
+ TYPE_WMVd = MAKE_TYPE ('W', 'M', 'V', 'd'),
+ TYPE_WMVe = MAKE_TYPE ('W', 'M', 'V', 'e'),
+ TYPE_WMVf = MAKE_TYPE ('W', 'M', 'V', 'f'),
+ TYPE_WMVg = MAKE_TYPE ('W', 'M', 'V', 'g'),
+ TYPE_WMVh = MAKE_TYPE ('W', 'M', 'V', 'h'),
+ TYPE_WMVi = MAKE_TYPE ('W', 'M', 'V', 'i'),
+ TYPE_WMVj = MAKE_TYPE ('W', 'M', 'V', 'j')
+};
+
+struct RFBFormat
+{
+ int width;
+ int height;
+ int stride;
+ int bytes_per_pixel;
+ int depth;
+ int big_endian;
+
+ guint8 descriptor[16]; /* The raw format descriptor block */
+};
+
+enum CursorType
+{
+ CURSOR_COLOUR = 0,
+ CURSOR_ALPHA = 1
+};
+
+struct Cursor
+{
+ enum CursorType type;
+ int visible;
+ int x;
+ int y;
+ int width;
+ int height;
+ int hot_x;
+ int hot_y;
+ guint8 *cursordata;
+ guint8 *cursormask;
+};
+
+typedef struct
+{
+ GstElement element;
+
+ GstPad *sinkpad;
+ GstPad *srcpad;
+
+ GstCaps *caps;
+
+ int framerate_num;
+ int framerate_denom;
+
+ struct Cursor cursor;
+ struct RFBFormat format;
+ guint8 *imagedata;
+} GstVMncDec;
+
+typedef struct
+{
+ GstElementClass parent_class;
+} GstVMncDecClass;
+
+static const GstElementDetails vmnc_dec_details =
+GST_ELEMENT_DETAILS ("VMnc video decoder",
+ "Codec/Decoder/Video",
+ "Decode VMnc to raw (RGB) video",
+ "Michael Smith <msmith@xiph.org>");
+
+static GstStaticPadTemplate vmnc_dec_src_factory =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-raw-rgb"));
+
+static GstStaticPadTemplate vmnc_dec_sink_factory =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-vmnc, version=(int)1, "
+ "framerate=(fraction)[0, max], "
+ "width=(int)[0, max], " "height=(int)[0, max]")
+ );
+
+GST_BOILERPLATE (GstVMncDec, gst_vmnc_dec, GstElement, GST_TYPE_ELEMENT);
+
+static void vmnc_dec_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+static void vmnc_dec_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+
+static GstFlowReturn vmnc_dec_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean vmnc_dec_setcaps (GstPad * pad, GstCaps * caps);
+static GstStateChangeReturn vmnc_dec_change_state (GstElement * element,
+ GstStateChange transition);
+
+static void
+gst_vmnc_dec_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&vmnc_dec_src_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&vmnc_dec_sink_factory));
+ gst_element_class_set_details (element_class, &vmnc_dec_details);
+}
+
+static void
+gst_vmnc_dec_class_init (GstVMncDecClass * klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ gobject_class->set_property = vmnc_dec_set_property;
+ gobject_class->get_property = vmnc_dec_get_property;
+
+ gstelement_class->change_state = vmnc_dec_change_state;
+
+ GST_DEBUG_CATEGORY_INIT (vmnc_debug, "vmncdec", 0, "VMnc decoder");
+}
+
+static void
+gst_vmnc_dec_init (GstVMncDec * dec, GstVMncDecClass * g_class)
+{
+ dec->sinkpad =
+ gst_pad_new_from_static_template (&vmnc_dec_sink_factory, "sink");
+ gst_pad_set_chain_function (dec->sinkpad, vmnc_dec_chain);
+ gst_pad_set_setcaps_function (dec->sinkpad, vmnc_dec_setcaps);
+ gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
+
+ dec->srcpad = gst_pad_new_from_static_template (&vmnc_dec_src_factory, "src");
+ gst_pad_use_fixed_caps (dec->srcpad);
+
+ gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
+}
+
+static void
+gst_vmnc_dec_reset (GstVMncDec * dec)
+{
+ if (dec->caps) {
+ gst_caps_unref (dec->caps);
+ dec->caps = NULL;
+ }
+ if (dec->imagedata) {
+ g_free (dec->imagedata);
+ dec->imagedata = NULL;
+ }
+
+ if (dec->cursor.cursordata) {
+ g_free (dec->cursor.cursordata);
+ dec->cursor.cursordata = NULL;
+ }
+ if (dec->cursor.cursormask) {
+ g_free (dec->cursor.cursormask);
+ dec->cursor.cursormask = NULL;
+ }
+ dec->cursor.visible = 0;
+
+ /* Use these as defaults if the container doesn't provide anything */
+ dec->framerate_num = 5;
+ dec->framerate_denom = 1;
+}
+
+struct RfbRectangle
+{
+ guint16 x;
+ guint16 y;
+ guint16 width;
+ guint16 height;
+
+ gint32 type;
+};
+
+/* Rectangle handling functions.
+ * Return number of bytes consumed, or < 0 on error
+ */
+typedef int (*rectangle_handler) (GstVMncDec * dec, struct RfbRectangle * rect,
+ guint8 * data, int len);
+
+static int
+vmnc_handle_wmvi_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ GstCaps *caps;
+ gint bpp, tc;
+ guint32 redmask, greenmask, bluemask;
+ guint32 endianness, dataendianness;
+
+ /* A WMVi rectangle has a 16byte payload */
+ if (len < 16) {
+ GST_WARNING_OBJECT (dec, "Bad WMVi rect: too short");
+ return -1;
+ }
+
+ /* We only compare 13 bytes; ignoring the 3 padding bytes at the end */
+ if (memcmp (data, dec->format.descriptor, 13) == 0) {
+ /* Nothing changed, so just exit */
+ return 16;
+ }
+
+ /* Store the whole block for simple comparison later */
+ memcpy (dec->format.descriptor, data, 16);
+
+ if (rect->x != 0 || rect->y != 0) {
+ GST_WARNING_OBJECT (dec, "Bad WMVi rect: wrong coordinates");
+ return -1;
+ }
+
+ bpp = data[0];
+ dec->format.depth = data[1];
+ dec->format.big_endian = data[2];
+ dataendianness = data[2] ? G_BIG_ENDIAN : G_LITTLE_ENDIAN;
+ tc = data[3];
+
+ if (bpp != 8 && bpp != 16 && bpp != 32) {
+ GST_WARNING_OBJECT (dec, "Bad bpp value: %d", bpp);
+ return -1;
+ }
+
+ if (!tc) {
+ GST_WARNING_OBJECT (dec, "Paletted video not supported");
+ return -1;
+ }
+
+ dec->format.bytes_per_pixel = bpp / 8;
+ dec->format.width = rect->width;
+ dec->format.height = rect->height;
+
+ redmask = (guint32) (RFB_GET_UINT16 (data + 4)) << data[10];
+ greenmask = (guint32) (RFB_GET_UINT16 (data + 6)) << data[11];
+ bluemask = (guint32) (RFB_GET_UINT16 (data + 8)) << data[12];
+
+ GST_DEBUG_OBJECT (dec, "Red: mask %d, shift %d",
+ RFB_GET_UINT16 (data + 4), data[10]);
+ GST_DEBUG_OBJECT (dec, "Green: mask %d, shift %d",
+ RFB_GET_UINT16 (data + 6), data[11]);
+ GST_DEBUG_OBJECT (dec, "Blue: mask %d, shift %d",
+ RFB_GET_UINT16 (data + 8), data[12]);
+ GST_DEBUG_OBJECT (dec, "BPP: %d. endianness: %s", bpp,
+ data[2] ? "big" : "little");
+
+ /* GStreamer's RGB caps are a bit weird. */
+ if (bpp == 8) {
+ endianness = G_BYTE_ORDER; /* Doesn't matter */
+ } else if (bpp == 16) {
+ /* We require host-endian. */
+ endianness = G_BYTE_ORDER;
+ } else { /* bpp == 32 */
+ /* We require big endian */
+ endianness = G_BIG_ENDIAN;
+ if (endianness != dataendianness) {
+ redmask = GUINT32_SWAP_LE_BE (redmask);
+ greenmask = GUINT32_SWAP_LE_BE (greenmask);
+ bluemask = GUINT32_SWAP_LE_BE (bluemask);
+ }
+ }
+
+ caps = gst_caps_new_simple ("video/x-raw-rgb",
+ "framerate", GST_TYPE_FRACTION, dec->framerate_num, dec->framerate_denom,
+ "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
+ "width", G_TYPE_INT, rect->width, "height", G_TYPE_INT, rect->height,
+ "bpp", G_TYPE_INT, bpp,
+ "depth", G_TYPE_INT, dec->format.depth,
+ "endianness", G_TYPE_INT, endianness,
+ "red_mask", G_TYPE_INT, redmask,
+ "green_mask", G_TYPE_INT, greenmask,
+ "blue_mask", G_TYPE_INT, bluemask, NULL);
+ gst_pad_set_caps (dec->srcpad, caps);
+
+ if (dec->caps)
+ gst_caps_unref (dec->caps);
+ dec->caps = caps;
+
+ if (dec->imagedata)
+ g_free (dec->imagedata);
+ dec->imagedata = g_malloc (dec->format.width * dec->format.height *
+ dec->format.bytes_per_pixel);
+
+ dec->format.stride = dec->format.width * dec->format.bytes_per_pixel;
+
+ return 16;
+}
+
+static void
+render_colour_cursor (GstVMncDec * dec, guint8 * data, int x, int y,
+ int off_x, int off_y, int width, int height)
+{
+ int i, j;
+ guint8 *dstraw = data + dec->format.stride * y +
+ dec->format.bytes_per_pixel * x;
+ guint8 *srcraw = dec->cursor.cursordata +
+ dec->cursor.width * dec->format.bytes_per_pixel * off_y;
+ guint8 *maskraw = dec->cursor.cursormask +
+ dec->cursor.width * dec->format.bytes_per_pixel * off_y;
+
+ /* Boundchecking done by caller; this is just the renderer inner loop */
+ if (dec->format.bytes_per_pixel == 1) {
+ guint8 *dst = dstraw;
+ guint8 *src = srcraw;
+ guint8 *mask = maskraw;
+
+ for (i = 0; i < height; i++) {
+ for (j = 0; j < width; j++) {
+ dst[j] = (dst[j] & src[j]) ^ mask[j];
+ }
+ dst += dec->format.width;
+ src += dec->cursor.width;
+ mask += dec->cursor.width;
+ }
+ } else if (dec->format.bytes_per_pixel == 2) {
+ guint16 *dst = (guint16 *) dstraw;
+ guint16 *src = (guint16 *) srcraw;
+ guint16 *mask = (guint16 *) maskraw;
+
+ for (i = 0; i < height; i++) {
+ for (j = 0; j < width; j++) {
+ dst[j] = (dst[j] & src[j]) ^ mask[j];
+ }
+ dst += dec->format.width;
+ src += dec->cursor.width;
+ mask += dec->cursor.width;
+ }
+ } else {
+ guint32 *dst = (guint32 *) dstraw;
+ guint32 *src = (guint32 *) srcraw;
+ guint32 *mask = (guint32 *) maskraw;
+
+ for (i = 0; i < height; i++) {
+ for (j = 0; j < width; j++) {
+ dst[j] = (dst[j] & src[j]) ^ mask[j];
+ }
+ dst += dec->format.width;
+ src += dec->cursor.width;
+ mask += dec->cursor.width;
+ }
+ }
+}
+
+static void
+render_cursor (GstVMncDec * dec, guint8 * data)
+{
+ /* First, figure out the portion of the cursor that's on-screen */
+ /* X,Y of top-left of cursor */
+ int x = dec->cursor.x - dec->cursor.hot_x;
+ int y = dec->cursor.y - dec->cursor.hot_y;
+
+ /* Width, height of rendered portion of cursor */
+ int width = dec->cursor.width;
+ int height = dec->cursor.height;
+
+ /* X,Y offset of rendered portion of cursor */
+ int off_x = 0;
+ int off_y = 0;
+
+ if (x < 0) {
+ off_x = -x;
+ width += x;
+ x = 0;
+ }
+ if (x + width > dec->format.width)
+ width = dec->format.width - x;
+ if (y < 0) {
+ off_y = -y;
+ height += y;
+ y = 0;
+ }
+ if (y + height > dec->format.height)
+ height = dec->format.height - y;
+
+ if (dec->cursor.type == CURSOR_COLOUR) {
+ render_colour_cursor (dec, data, x, y, off_x, off_y, width, height);
+ } else {
+ /* Alpha cursor. */
+ /* TODO: Implement me! */
+ GST_WARNING_OBJECT (dec, "Alpha composited cursors not yet implemented");
+ }
+}
+
+static GstBuffer *
+vmnc_make_buffer (GstVMncDec * dec, GstBuffer * inbuf)
+{
+ int size = dec->format.stride * dec->format.height;
+ GstBuffer *buf = gst_buffer_new_and_alloc (size);
+ guint8 *data = GST_BUFFER_DATA (buf);
+
+ memcpy (data, dec->imagedata, size);
+
+ if (dec->cursor.visible) {
+ render_cursor (dec, data);
+ }
+
+ gst_buffer_stamp (buf, inbuf);
+
+ gst_buffer_set_caps (buf, dec->caps);
+
+ return buf;
+}
+
+static int
+vmnc_handle_wmvd_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ /* Cursor data. */
+ int datalen = 2;
+ int type, size;
+
+ if (len < datalen) {
+ GST_WARNING_OBJECT (dec, "Cursor data too short");
+ return -1;
+ }
+
+ type = RFB_GET_UINT8 (data);
+
+ if (type == CURSOR_COLOUR) {
+ datalen += rect->width * rect->height * dec->format.bytes_per_pixel * 2;
+ } else if (type == CURSOR_ALPHA) {
+ datalen += rect->width * rect->height * 4;
+ } else {
+ GST_WARNING_OBJECT (dec, "Unknown cursor type: %d", type);
+ return -1;
+ }
+
+ if (len < datalen) {
+ GST_WARNING_OBJECT (dec, "Cursor data too short");
+ return -1;
+ }
+
+ dec->cursor.type = type;
+ dec->cursor.width = rect->width;
+ dec->cursor.height = rect->height;
+ dec->cursor.type = type;
+ dec->cursor.hot_x = rect->x;
+ dec->cursor.hot_y = rect->y;
+
+ if (dec->cursor.cursordata)
+ g_free (dec->cursor.cursordata);
+ if (dec->cursor.cursormask)
+ g_free (dec->cursor.cursormask);
+
+ if (type == 0) {
+ size = rect->width * rect->height * dec->format.bytes_per_pixel;
+ dec->cursor.cursordata = g_malloc (size);
+ dec->cursor.cursormask = g_malloc (size);
+ memcpy (dec->cursor.cursordata, data + 2, size);
+ memcpy (dec->cursor.cursormask, data + 2 + size, size);
+ } else {
+ dec->cursor.cursordata = g_malloc (rect->width * rect->height * 4);
+ memcpy (dec->cursor.cursordata, data + 2, rect->width * rect->height * 4);
+ }
+
+ return datalen;
+}
+
+static int
+vmnc_handle_wmve_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ guint16 flags;
+
+ /* Cursor state. */
+ if (len < 2) {
+ GST_WARNING_OBJECT (dec, "Cursor data too short");
+ return -1;
+ }
+
+ flags = RFB_GET_UINT16 (data);
+ dec->cursor.visible = flags & 0x01;
+
+ return 2;
+}
+
+static int
+vmnc_handle_wmvf_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ /* Cursor position. */
+ dec->cursor.x = rect->x;
+ dec->cursor.y = rect->y;
+ return 0;
+}
+
+static int
+vmnc_handle_wmvg_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ /* Keyboard stuff; not interesting for playback */
+ if (len < 10) {
+ GST_WARNING_OBJECT (dec, "Keyboard data too short");
+ return -1;
+ }
+ return 10;
+}
+
+static int
+vmnc_handle_wmvh_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ /* More keyboard stuff; not interesting for playback */
+ if (len < 4) {
+ GST_WARNING_OBJECT (dec, "Keyboard data too short");
+ return -1;
+ }
+ return 4;
+}
+
+static int
+vmnc_handle_wmvj_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ /* VM state info, not interesting for playback */
+ if (len < 2) {
+ GST_WARNING_OBJECT (dec, "VM state data too short");
+ return -1;
+ }
+ return 2;
+}
+
+static void
+render_raw_tile (GstVMncDec * dec, guint8 * data, int x, int y,
+ int width, int height)
+{
+ int i;
+ guint8 *dst, *src;
+ int line;
+
+ src = data;
+ dst = dec->imagedata + dec->format.stride * y +
+ dec->format.bytes_per_pixel * x;
+ line = width * dec->format.bytes_per_pixel;
+
+ for (i = 0; i < height; i++) {
+ /* This is wrong-endian currently */
+ memcpy (dst, src, line);
+
+ dst += dec->format.stride;
+ src += line;
+ }
+}
+
+static void
+render_subrect (GstVMncDec * dec, int x, int y, int width,
+ int height, guint32 colour)
+{
+ /* Crazy inefficient! */
+ int i, j;
+ guint8 *dst;
+
+ for (i = 0; i < height; i++) {
+ dst = dec->imagedata + dec->format.stride * (y + i) +
+ dec->format.bytes_per_pixel * x;
+ for (j = 0; j < width; j++) {
+ memcpy (dst, &colour, dec->format.bytes_per_pixel);
+ dst += dec->format.bytes_per_pixel;
+ }
+ }
+}
+
+static int
+vmnc_handle_raw_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ int datalen = rect->width * rect->height * dec->format.bytes_per_pixel;
+
+ if (len < datalen) {
+ GST_WARNING_OBJECT (dec, "Raw data too short");
+ return -1;
+ }
+
+ render_raw_tile (dec, data, rect->x, rect->y, rect->width, rect->height);
+
+ return datalen;
+}
+
+#define READ_PIXEL(pixel, data, off, len) \
+ if (dec->format.bytes_per_pixel == 1) { \
+ if (off >= len) \
+ return -1; \
+ pixel = data[off++]; \
+ } else if (dec->format.bytes_per_pixel == 2) { \
+ if (off+2 > len) \
+ return -1; \
+ pixel = (*(guint16 *)(data + off)); \
+ off += 2; \
+ } else { \
+ if (off+4 > len) \
+ return -1; \
+ pixel = (*(guint32 *)(data + off)); \
+ off += 4; \
+ }
+
+static int
+vmnc_handle_hextile_rectangle (GstVMncDec * dec, struct RfbRectangle *rect,
+ guint8 * data, int len)
+{
+ int tilesx = GST_ROUND_UP_16 (rect->width) / 16;
+ int tilesy = GST_ROUND_UP_16 (rect->height) / 16;
+ int x, y, z;
+ int off = 0;
+ int subrects;
+ int coloured;
+ int width, height;
+ guint32 fg = 0, bg = 0, colour;
+ guint8 flags;
+
+ for (y = 0; y < tilesy; y++) {
+ if (y == tilesy - 1)
+ height = rect->height - (tilesy - 1) * 16;
+ else
+ height = 16;
+
+ for (x = 0; x < tilesx; x++) {
+ if (x == tilesx - 1)
+ width = rect->width - (tilesx - 1) * 16;
+ else
+ width = 16;
+
+ if (off >= len) {
+ return -1;
+ }
+ flags = data[off++];
+
+ if (flags & 0x1) {
+ if (off + width * height * dec->format.bytes_per_pixel > len) {
+ return -1;
+ }
+ render_raw_tile (dec, data + off, rect->x + x * 16, rect->y + y * 16,
+ width, height);
+ off += width * height * dec->format.bytes_per_pixel;
+ } else {
+ if (flags & 0x2) {
+ READ_PIXEL (bg, data, off, len)
+ }
+ if (flags & 0x4) {
+ READ_PIXEL (fg, data, off, len)
+ }
+
+ subrects = 0;
+ if (flags & 0x8) {
+ if (off >= len) {
+ return -1;
+ }
+ subrects = data[off++];
+ }
+
+ /* Paint background colour on entire tile */
+ render_subrect (dec, rect->x + x * 16, rect->y + y * 16, width, height,
+ bg);
+
+ coloured = flags & 0x10;
+ for (z = 0; z < subrects; z++) {
+ if (off + (coloured ? 3 : 2) > len)
+ return -1;
+ if (coloured) {
+ READ_PIXEL (colour, data, off, len);
+ } else
+ colour = fg;
+
+ {
+ int off_x = (data[off] & 0xf0) >> 4;
+ int off_y = (data[off] & 0x0f);
+ int w = ((data[off + 1] & 0xf0) >> 4) + 1;
+ int h = (data[off + 1] & 0x0f) + 1;
+
+ off += 2;
+
+ /* Ensure we don't have out of bounds coordinates */
+ if (off_x + w > width || off_y + h > height)
+ return -1;
+
+ render_subrect (dec, rect->x + x * 16 + off_x,
+ rect->y + y * 16 + off_y, w, h, colour);
+ }
+ }
+ }
+ }
+ }
+
+ return off;
+}
+
+static GstFlowReturn
+vmnc_handle_packet (GstVMncDec * dec, GstBuffer * buf)
+{
+ guint8 *data = GST_BUFFER_DATA (buf);
+ int len = GST_BUFFER_SIZE (buf);
+ int type;
+
+ if (len < 4) {
+ GST_WARNING_OBJECT (dec, "Packet too short");
+ return GST_FLOW_ERROR;
+ }
+
+ type = data[0];
+
+ switch (type) {
+ case 0:
+ {
+ int numrect = RFB_GET_UINT16 (data + 2);
+ int i;
+ int offset = 4;
+ int read;
+
+ for (i = 0; i < numrect; i++) {
+ struct RfbRectangle r;
+ rectangle_handler handler;
+
+ if (len < offset + 12) {
+ GST_WARNING_OBJECT (dec, "Packet too short for rectangle header");
+ return GST_FLOW_ERROR;
+ }
+ r.x = RFB_GET_UINT16 (data + offset);
+ r.y = RFB_GET_UINT16 (data + offset + 2);
+ r.width = RFB_GET_UINT16 (data + offset + 4);
+ r.height = RFB_GET_UINT16 (data + offset + 6);
+ r.type = RFB_GET_UINT32 (data + offset + 8);
+
+ if (r.type != TYPE_WMVi) {
+ /* We must have a WMVi packet to initialise things before we can
+ * continue */
+ if (!dec->caps) {
+ GST_WARNING_OBJECT (dec, "Received packet without WMVi");
+ return GST_FLOW_ERROR;
+ }
+ if (r.x + r.width > dec->format.width ||
+ r.y + r.height > dec->format.height) {
+ GST_WARNING_OBJECT (dec, "Rectangle out of range, type %d", r.type);
+ return GST_FLOW_ERROR;
+ }
+ }
+
+ switch (r.type) {
+ case TYPE_WMVd:
+ handler = vmnc_handle_wmvd_rectangle;
+ break;
+ case TYPE_WMVe:
+ handler = vmnc_handle_wmve_rectangle;
+ break;
+ case TYPE_WMVf:
+ handler = vmnc_handle_wmvf_rectangle;
+ break;
+ case TYPE_WMVg:
+ handler = vmnc_handle_wmvg_rectangle;
+ break;
+ case TYPE_WMVh:
+ handler = vmnc_handle_wmvh_rectangle;
+ break;
+ case TYPE_WMVi:
+ handler = vmnc_handle_wmvi_rectangle;
+ break;
+ case TYPE_WMVj:
+ handler = vmnc_handle_wmvj_rectangle;
+ break;
+ case TYPE_RAW:
+ handler = vmnc_handle_raw_rectangle;
+ break;
+ case TYPE_HEXTILE:
+ handler = vmnc_handle_hextile_rectangle;
+ break;
+ default:
+ GST_WARNING_OBJECT (dec, "Unknown rectangle type");
+ return GST_FLOW_ERROR;
+ }
+
+ read = handler (dec, &r, data + offset + 12, len - offset - 12);
+ if (read < 0) {
+ GST_WARNING_OBJECT (dec, "Error calling rectangle handler\n");
+ return GST_FLOW_ERROR;
+ }
+ offset += 12 + read;
+ }
+ break;
+ }
+ default:
+ GST_WARNING_OBJECT (dec, "Packet type unknown: %d", type);
+ return GST_FLOW_ERROR;
+ }
+
+ return GST_FLOW_OK;
+}
+
+static gboolean
+vmnc_dec_setcaps (GstPad * pad, GstCaps * caps)
+{
+ /* We require a format descriptor in-stream, so we ignore the info from the
+ * container here. We just use the framerate */
+ GstVMncDec *dec = GST_VMNC_DEC (gst_pad_get_parent (pad));
+ GstStructure *structure = gst_caps_get_structure (caps, 0);
+
+ /* We gave these a default in reset(), so we don't need to check for failure
+ * here */
+ gst_structure_get_fraction (structure, "framerate",
+ &dec->framerate_num, &dec->framerate_denom);
+
+ gst_object_unref (dec);
+
+ return TRUE;
+}
+
+static GstFlowReturn
+vmnc_dec_chain (GstPad * pad, GstBuffer * buf)
+{
+ GstVMncDec *dec;
+ GstFlowReturn res;
+ GstBuffer *outbuf;
+
+ dec = GST_VMNC_DEC (gst_pad_get_parent (pad));
+
+ res = vmnc_handle_packet (dec, buf);
+
+ if (res == GST_FLOW_OK) {
+ outbuf = vmnc_make_buffer (dec, buf);
+ res = gst_pad_push (dec->srcpad, outbuf);
+ }
+ gst_buffer_unref (buf);
+
+ gst_object_unref (dec);
+
+ return res;
+}
+
+static GstStateChangeReturn
+vmnc_dec_change_state (GstElement * element, GstStateChange transition)
+{
+ GstVMncDec *dec = GST_VMNC_DEC (element);
+ GstStateChangeReturn ret;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_NULL_TO_READY:
+ break;
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ gst_vmnc_dec_reset (dec);
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+ break;
+ default:
+ break;
+ }
+
+ ret = parent_class->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ gst_vmnc_dec_reset (dec);
+ break;
+ case GST_STATE_CHANGE_READY_TO_NULL:
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void
+vmnc_dec_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ /*GstVMncDec *dec = GST_VMNC_DEC (object); */
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+vmnc_dec_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ /*GstVMncDec *dec = GST_VMNC_DEC (object); */
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ if (!gst_element_register (plugin, "vmncdec", GST_RANK_PRIMARY,
+ gst_vmnc_dec_get_type ()))
+ return FALSE;
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "vmnc",
+ "VMnc video plugin library",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
projects / platform / upstream / gstreamer.git / commitdiff