* VMware Screen Codec (VMnc) decoder
* Copyright (c) 2006 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
- * @file vmnc.c
+ * @file libavcodec/vmnc.c
* VMware Screen Codec (VMnc) decoder
* As Alex Beregszaszi discovered, this is effectively RFB data dump
*/
#include <stdio.h>
#include <stdlib.h>
-#include "common.h"
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-#define MAGIC_WMVi 0x574D5669
+enum EncTypes {
+ MAGIC_WMVd = 0x574D5664,
+ MAGIC_WMVe,
+ MAGIC_WMVf,
+ MAGIC_WMVg,
+ MAGIC_WMVh,
+ MAGIC_WMVi,
+ MAGIC_WMVj
+};
enum HexTile_Flags {
HT_RAW = 1, // tile is raw
int bigendian;
uint8_t pal[768];
int width, height;
+
+ /* cursor data */
+ int cur_w, cur_h;
+ int cur_x, cur_y;
+ int cur_hx, cur_hy;
+ uint8_t* curbits, *curmask;
+ uint8_t* screendta;
} VmncContext;
/* read pixel value from stream */
-static always_inline int vmnc_get_pixel(uint8_t* buf, int bpp, int be) {
+static av_always_inline int vmnc_get_pixel(const uint8_t* buf, int bpp, int be) {
switch(bpp * 2 + be) {
case 2:
case 3: return *buf;
- case 4: return LE_16(buf);
- case 5: return BE_16(buf);
- case 8: return LE_32(buf);
- case 9: return BE_32(buf);
+ case 4: return AV_RL16(buf);
+ case 5: return AV_RB16(buf);
+ case 8: return AV_RL32(buf);
+ case 9: return AV_RB32(buf);
default: return 0;
}
}
-/* fill rectangle with given colour */
-static always_inline void paint_rect(uint8_t *dst, int dx, int dy, int w, int h, int color, int bpp, int stride)
+static void load_cursor(VmncContext *c, const uint8_t *src)
+{
+ int i, j, p;
+ const int bpp = c->bpp2;
+ uint8_t *dst8 = c->curbits;
+ uint16_t *dst16 = (uint16_t*)c->curbits;
+ uint32_t *dst32 = (uint32_t*)c->curbits;
+
+ for(j = 0; j < c->cur_h; j++) {
+ for(i = 0; i < c->cur_w; i++) {
+ p = vmnc_get_pixel(src, bpp, c->bigendian);
+ src += bpp;
+ if(bpp == 1) *dst8++ = p;
+ if(bpp == 2) *dst16++ = p;
+ if(bpp == 4) *dst32++ = p;
+ }
+ }
+ dst8 = c->curmask;
+ dst16 = (uint16_t*)c->curmask;
+ dst32 = (uint32_t*)c->curmask;
+ for(j = 0; j < c->cur_h; j++) {
+ for(i = 0; i < c->cur_w; i++) {
+ p = vmnc_get_pixel(src, bpp, c->bigendian);
+ src += bpp;
+ if(bpp == 1) *dst8++ = p;
+ if(bpp == 2) *dst16++ = p;
+ if(bpp == 4) *dst32++ = p;
+ }
+ }
+}
+
+static void put_cursor(uint8_t *dst, int stride, VmncContext *c, int dx, int dy)
+{
+ int i, j;
+ int w, h, x, y;
+ w = c->cur_w;
+ if(c->width < c->cur_x + c->cur_w) w = c->width - c->cur_x;
+ h = c->cur_h;
+ if(c->height < c->cur_y + c->cur_h) h = c->height - c->cur_y;
+ x = c->cur_x;
+ y = c->cur_y;
+ if(x < 0) {
+ w += x;
+ x = 0;
+ }
+ if(y < 0) {
+ h += y;
+ y = 0;
+ }
+
+ if((w < 1) || (h < 1)) return;
+ dst += x * c->bpp2 + y * stride;
+
+ if(c->bpp2 == 1) {
+ uint8_t* cd = c->curbits, *msk = c->curmask;
+ for(j = 0; j < h; j++) {
+ for(i = 0; i < w; i++)
+ dst[i] = (dst[i] & cd[i]) ^ msk[i];
+ msk += c->cur_w;
+ cd += c->cur_w;
+ dst += stride;
+ }
+ } else if(c->bpp2 == 2) {
+ uint16_t* cd = (uint16_t*)c->curbits, *msk = (uint16_t*)c->curmask;
+ uint16_t* dst2;
+ for(j = 0; j < h; j++) {
+ dst2 = (uint16_t*)dst;
+ for(i = 0; i < w; i++)
+ dst2[i] = (dst2[i] & cd[i]) ^ msk[i];
+ msk += c->cur_w;
+ cd += c->cur_w;
+ dst += stride;
+ }
+ } else if(c->bpp2 == 4) {
+ uint32_t* cd = (uint32_t*)c->curbits, *msk = (uint32_t*)c->curmask;
+ uint32_t* dst2;
+ for(j = 0; j < h; j++) {
+ dst2 = (uint32_t*)dst;
+ for(i = 0; i < w; i++)
+ dst2[i] = (dst2[i] & cd[i]) ^ msk[i];
+ msk += c->cur_w;
+ cd += c->cur_w;
+ dst += stride;
+ }
+ }
+}
+
+/* fill rectangle with given color */
+static av_always_inline void paint_rect(uint8_t *dst, int dx, int dy, int w, int h, int color, int bpp, int stride)
{
int i, j;
dst += dx * bpp + dy * stride;
}
}
-static always_inline void paint_raw(uint8_t *dst, int w, int h, uint8_t* src, int bpp, int be, int stride)
+static av_always_inline void paint_raw(uint8_t *dst, int w, int h, const uint8_t* src, int bpp, int be, int stride)
{
int i, j, p;
for(j = 0; j < h; j++) {
}
}
-static int decode_hextile(VmncContext *c, uint8_t* dst, uint8_t* src, int w, int h, int stride)
+static int decode_hextile(VmncContext *c, uint8_t* dst, const uint8_t* src, int ssize, int w, int h, int stride)
{
int i, j, k;
int bg = 0, fg = 0, rects, color, flags, xy, wh;
const int bpp = c->bpp2;
uint8_t *dst2;
int bw = 16, bh = 16;
- uint8_t *ssrc=src;
+ const uint8_t *ssrc=src;
for(j = 0; j < h; j += 16) {
dst2 = dst;
bw = 16;
if(j + 16 > h) bh = h - j;
for(i = 0; i < w; i += 16, dst2 += 16 * bpp) {
+ if(src - ssrc >= ssize) {
+ av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n");
+ return -1;
+ }
if(i + 16 > w) bw = w - i;
flags = *src++;
if(flags & HT_RAW) {
+ if(src - ssrc > ssize - bw * bh * bpp) {
+ av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n");
+ return -1;
+ }
paint_raw(dst2, bw, bh, src, bpp, c->bigendian, stride);
src += bw * bh * bpp;
} else {
rects = 0;
if(flags & HT_SUB)
rects = *src++;
- color = (flags & HT_CLR);
+ color = !!(flags & HT_CLR);
paint_rect(dst2, 0, 0, bw, bh, bg, bpp, stride);
+ if(src - ssrc > ssize - rects * (color * bpp + 2)) {
+ av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n");
+ return -1;
+ }
for(k = 0; k < rects; k++) {
if(color) {
fg = vmnc_get_pixel(src, bpp, c->bigendian); src += bpp;
return src - ssrc;
}
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
{
- VmncContext * const c = (VmncContext *)avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ VmncContext * const c = avctx->priv_data;
uint8_t *outptr;
- uint8_t *src = buf;
- int t, dx, dy, w, h, enc, chunks, res;
+ const uint8_t *src = buf;
+ int dx, dy, w, h, depth, enc, chunks, res, size_left;
c->pic.reference = 1;
c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
return -1;
}
- t = BE_32(src);
- src += 4;
-
- chunks = t & 0xFF;
- if(chunks > 8) {
- av_log(avctx, AV_LOG_ERROR, "Frame decoding is not possible. Please report sample to developers.\n");
- return -1;
- }
- if(chunks == 8) {
- int w, h, depth;
- c->pic.key_frame = 1;
- c->pic.pict_type = FF_I_TYPE;
-
- /* parse ServerInitialization struct */
- src += 4;
- w = BE_16(src); src += 2;
- h = BE_16(src); src += 2;
- t = BE_32(src); src += 4;
- if(t != MAGIC_WMVi) {
- av_log(avctx, AV_LOG_INFO, "Invalid header: magic not found\n");
- return -1;
+ c->pic.key_frame = 0;
+ c->pic.pict_type = FF_P_TYPE;
+
+ //restore screen after cursor
+ if(c->screendta) {
+ int i;
+ w = c->cur_w;
+ if(c->width < c->cur_x + w) w = c->width - c->cur_x;
+ h = c->cur_h;
+ if(c->height < c->cur_y + h) h = c->height - c->cur_y;
+ dx = c->cur_x;
+ if(dx < 0) {
+ w += dx;
+ dx = 0;
}
- depth = *src++;
- if(depth != c->bpp) {
- av_log(avctx, AV_LOG_INFO, "Depth mismatch. Container %i bpp, Frame data: %i bpp\n", c->bpp, depth);
+ dy = c->cur_y;
+ if(dy < 0) {
+ h += dy;
+ dy = 0;
}
- src++;
- c->bigendian = *src++;
- if(c->bigendian & (~1)) {
- av_log(avctx, AV_LOG_INFO, "Invalid header: bigendian flag = %i\n", c->bigendian);
- return -1;
+ if((w > 0) && (h > 0)) {
+ outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
+ for(i = 0; i < h; i++) {
+ memcpy(outptr, c->screendta + i * c->cur_w * c->bpp2, w * c->bpp2);
+ outptr += c->pic.linesize[0];
+ }
}
- //skip pixel format data
- src += 13;
- chunks = 1; // there should be one chunk with the whole frame, rest could be ignored
- } else {
- c->pic.key_frame = 0;
- c->pic.pict_type = FF_P_TYPE;
}
+ src += 2;
+ chunks = AV_RB16(src); src += 2;
while(chunks--) {
- // decode FramebufferUpdate struct
- dx = BE_16(src); src += 2;
- dy = BE_16(src); src += 2;
- w = BE_16(src); src += 2;
- h = BE_16(src); src += 2;
- if((dx + w > c->width) || (dy + h > c->height)) {
- av_log(avctx, AV_LOG_ERROR, "Incorrect frame size: %ix%i+%ix%i of %ix%i\n", w, h, dx, dy, c->width, c->height);
- return -1;
+ dx = AV_RB16(src); src += 2;
+ dy = AV_RB16(src); src += 2;
+ w = AV_RB16(src); src += 2;
+ h = AV_RB16(src); src += 2;
+ enc = AV_RB32(src); src += 4;
+ outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
+ size_left = buf_size - (src - buf);
+ switch(enc) {
+ case MAGIC_WMVd: // cursor
+ if(size_left < 2 + w * h * c->bpp2 * 2) {
+ av_log(avctx, AV_LOG_ERROR, "Premature end of data! (need %i got %i)\n", 2 + w * h * c->bpp2 * 2, size_left);
+ return -1;
+ }
+ src += 2;
+ c->cur_w = w;
+ c->cur_h = h;
+ c->cur_hx = dx;
+ c->cur_hy = dy;
+ if((c->cur_hx > c->cur_w) || (c->cur_hy > c->cur_h)) {
+ av_log(avctx, AV_LOG_ERROR, "Cursor hot spot is not in image: %ix%i of %ix%i cursor size\n", c->cur_hx, c->cur_hy, c->cur_w, c->cur_h);
+ c->cur_hx = c->cur_hy = 0;
+ }
+ c->curbits = av_realloc(c->curbits, c->cur_w * c->cur_h * c->bpp2);
+ c->curmask = av_realloc(c->curmask, c->cur_w * c->cur_h * c->bpp2);
+ c->screendta = av_realloc(c->screendta, c->cur_w * c->cur_h * c->bpp2);
+ load_cursor(c, src);
+ src += w * h * c->bpp2 * 2;
+ break;
+ case MAGIC_WMVe: // unknown
+ src += 2;
+ break;
+ case MAGIC_WMVf: // update cursor position
+ c->cur_x = dx - c->cur_hx;
+ c->cur_y = dy - c->cur_hy;
+ break;
+ case MAGIC_WMVg: // unknown
+ src += 10;
+ break;
+ case MAGIC_WMVh: // unknown
+ src += 4;
+ break;
+ case MAGIC_WMVi: // ServerInitialization struct
+ c->pic.key_frame = 1;
+ c->pic.pict_type = FF_I_TYPE;
+ depth = *src++;
+ if(depth != c->bpp) {
+ av_log(avctx, AV_LOG_INFO, "Depth mismatch. Container %i bpp, Frame data: %i bpp\n", c->bpp, depth);
+ }
+ src++;
+ c->bigendian = *src++;
+ if(c->bigendian & (~1)) {
+ av_log(avctx, AV_LOG_INFO, "Invalid header: bigendian flag = %i\n", c->bigendian);
+ return -1;
+ }
+ //skip the rest of pixel format data
+ src += 13;
+ break;
+ case MAGIC_WMVj: // unknown
+ src += 2;
+ break;
+ case 0x00000000: // raw rectangle data
+ if((dx + w > c->width) || (dy + h > c->height)) {
+ av_log(avctx, AV_LOG_ERROR, "Incorrect frame size: %ix%i+%ix%i of %ix%i\n", w, h, dx, dy, c->width, c->height);
+ return -1;
+ }
+ if(size_left < w * h * c->bpp2) {
+ av_log(avctx, AV_LOG_ERROR, "Premature end of data! (need %i got %i)\n", w * h * c->bpp2, size_left);
+ return -1;
+ }
+ paint_raw(outptr, w, h, src, c->bpp2, c->bigendian, c->pic.linesize[0]);
+ src += w * h * c->bpp2;
+ break;
+ case 0x00000005: // HexTile encoded rectangle
+ if((dx + w > c->width) || (dy + h > c->height)) {
+ av_log(avctx, AV_LOG_ERROR, "Incorrect frame size: %ix%i+%ix%i of %ix%i\n", w, h, dx, dy, c->width, c->height);
+ return -1;
+ }
+ res = decode_hextile(c, outptr, src, size_left, w, h, c->pic.linesize[0]);
+ if(res < 0)
+ return -1;
+ src += res;
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Unsupported block type 0x%08X\n", enc);
+ chunks = 0; // leave chunks decoding loop
}
- enc = BE_32(src); src += 4;
- if(enc != 0x00000005) {
- av_log(avctx, AV_LOG_ERROR, "Only hextile decoding is supported for now\n");
- switch(enc) {
- case 0:
- av_log(avctx, AV_LOG_INFO, "And this is raw encoding\n");
- break;
- case 1:
- av_log(avctx, AV_LOG_INFO, "And this is CopyRect encoding\n");
- break;
- case 2:
- av_log(avctx, AV_LOG_INFO, "And this is RRE encoding\n");
- break;
- case 3:
- av_log(avctx, AV_LOG_INFO, "And this is CoRRE encoding\n");
- break;
- default:
- av_log(avctx, AV_LOG_INFO, "And this is unknown encoding (%i)\n", enc);
+ }
+ if(c->screendta){
+ int i;
+ //save screen data before painting cursor
+ w = c->cur_w;
+ if(c->width < c->cur_x + w) w = c->width - c->cur_x;
+ h = c->cur_h;
+ if(c->height < c->cur_y + h) h = c->height - c->cur_y;
+ dx = c->cur_x;
+ if(dx < 0) {
+ w += dx;
+ dx = 0;
+ }
+ dy = c->cur_y;
+ if(dy < 0) {
+ h += dy;
+ dy = 0;
+ }
+ if((w > 0) && (h > 0)) {
+ outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
+ for(i = 0; i < h; i++) {
+ memcpy(c->screendta + i * c->cur_w * c->bpp2, outptr, w * c->bpp2);
+ outptr += c->pic.linesize[0];
}
- return -1;
+ outptr = c->pic.data[0];
+ put_cursor(outptr, c->pic.linesize[0], c, c->cur_x, c->cur_y);
}
- outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
- res = decode_hextile(c, outptr, src, w, h, c->pic.linesize[0]);
- if(res < 0)
- return -1;
- src += res;
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = c->pic;
* Init VMnc decoder
*
*/
-static int decode_init(AVCodecContext *avctx)
+static av_cold int decode_init(AVCodecContext *avctx)
{
- VmncContext * const c = (VmncContext *)avctx->priv_data;
+ VmncContext * const c = avctx->priv_data;
c->avctx = avctx;
- avctx->has_b_frames = 0;
- c->pic.data[0] = NULL;
c->width = avctx->width;
c->height = avctx->height;
- if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 0) {
- return 1;
- }
- c->bpp = avctx->bits_per_sample;
+ c->bpp = avctx->bits_per_coded_sample;
c->bpp2 = c->bpp/8;
switch(c->bpp){
* Uninit VMnc decoder
*
*/
-static int decode_end(AVCodecContext *avctx)
+static av_cold int decode_end(AVCodecContext *avctx)
{
- VmncContext * const c = (VmncContext *)avctx->priv_data;
+ VmncContext * const c = avctx->priv_data;
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
+ av_free(c->curbits);
+ av_free(c->curmask);
+ av_free(c->screendta);
return 0;
}
AVCodec vmnc_decoder = {
- "VMware video",
+ "vmnc",
CODEC_TYPE_VIDEO,
CODEC_ID_VMNC,
sizeof(VmncContext),
decode_init,
NULL,
decode_end,
- decode_frame
+ decode_frame,
+ CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("VMware Screen Codec / VMware Video"),
};
projects / frescor / ffmpeg.git / blobdiff