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00028 #include <stdio.h>
00029 #include <stdlib.h>
00030
00031 #include "avcodec.h"
00032
00033 enum EncTypes {
00034 MAGIC_WMVd = 0x574D5664,
00035 MAGIC_WMVe,
00036 MAGIC_WMVf,
00037 MAGIC_WMVg,
00038 MAGIC_WMVh,
00039 MAGIC_WMVi,
00040 MAGIC_WMVj
00041 };
00042
00043 enum HexTile_Flags {
00044 HT_RAW = 1,
00045 HT_BKG = 2,
00046 HT_FG = 4,
00047 HT_SUB = 8,
00048 HT_CLR = 16
00049 };
00050
00051
00052
00053
00054 typedef struct VmncContext {
00055 AVCodecContext *avctx;
00056 AVFrame pic;
00057
00058 int bpp;
00059 int bpp2;
00060 int bigendian;
00061 uint8_t pal[768];
00062 int width, height;
00063
00064
00065 int cur_w, cur_h;
00066 int cur_x, cur_y;
00067 int cur_hx, cur_hy;
00068 uint8_t* curbits, *curmask;
00069 uint8_t* screendta;
00070 } VmncContext;
00071
00072
00073 static av_always_inline int vmnc_get_pixel(const uint8_t* buf, int bpp, int be) {
00074 switch(bpp * 2 + be) {
00075 case 2:
00076 case 3: return *buf;
00077 case 4: return AV_RL16(buf);
00078 case 5: return AV_RB16(buf);
00079 case 8: return AV_RL32(buf);
00080 case 9: return AV_RB32(buf);
00081 default: return 0;
00082 }
00083 }
00084
00085 static void load_cursor(VmncContext *c, const uint8_t *src)
00086 {
00087 int i, j, p;
00088 const int bpp = c->bpp2;
00089 uint8_t *dst8 = c->curbits;
00090 uint16_t *dst16 = (uint16_t*)c->curbits;
00091 uint32_t *dst32 = (uint32_t*)c->curbits;
00092
00093 for(j = 0; j < c->cur_h; j++) {
00094 for(i = 0; i < c->cur_w; i++) {
00095 p = vmnc_get_pixel(src, bpp, c->bigendian);
00096 src += bpp;
00097 if(bpp == 1) *dst8++ = p;
00098 if(bpp == 2) *dst16++ = p;
00099 if(bpp == 4) *dst32++ = p;
00100 }
00101 }
00102 dst8 = c->curmask;
00103 dst16 = (uint16_t*)c->curmask;
00104 dst32 = (uint32_t*)c->curmask;
00105 for(j = 0; j < c->cur_h; j++) {
00106 for(i = 0; i < c->cur_w; i++) {
00107 p = vmnc_get_pixel(src, bpp, c->bigendian);
00108 src += bpp;
00109 if(bpp == 1) *dst8++ = p;
00110 if(bpp == 2) *dst16++ = p;
00111 if(bpp == 4) *dst32++ = p;
00112 }
00113 }
00114 }
00115
00116 static void put_cursor(uint8_t *dst, int stride, VmncContext *c, int dx, int dy)
00117 {
00118 int i, j;
00119 int w, h, x, y;
00120 w = c->cur_w;
00121 if(c->width < c->cur_x + c->cur_w) w = c->width - c->cur_x;
00122 h = c->cur_h;
00123 if(c->height < c->cur_y + c->cur_h) h = c->height - c->cur_y;
00124 x = c->cur_x;
00125 y = c->cur_y;
00126 if(x < 0) {
00127 w += x;
00128 x = 0;
00129 }
00130 if(y < 0) {
00131 h += y;
00132 y = 0;
00133 }
00134
00135 if((w < 1) || (h < 1)) return;
00136 dst += x * c->bpp2 + y * stride;
00137
00138 if(c->bpp2 == 1) {
00139 uint8_t* cd = c->curbits, *msk = c->curmask;
00140 for(j = 0; j < h; j++) {
00141 for(i = 0; i < w; i++)
00142 dst[i] = (dst[i] & cd[i]) ^ msk[i];
00143 msk += c->cur_w;
00144 cd += c->cur_w;
00145 dst += stride;
00146 }
00147 } else if(c->bpp2 == 2) {
00148 uint16_t* cd = (uint16_t*)c->curbits, *msk = (uint16_t*)c->curmask;
00149 uint16_t* dst2;
00150 for(j = 0; j < h; j++) {
00151 dst2 = (uint16_t*)dst;
00152 for(i = 0; i < w; i++)
00153 dst2[i] = (dst2[i] & cd[i]) ^ msk[i];
00154 msk += c->cur_w;
00155 cd += c->cur_w;
00156 dst += stride;
00157 }
00158 } else if(c->bpp2 == 4) {
00159 uint32_t* cd = (uint32_t*)c->curbits, *msk = (uint32_t*)c->curmask;
00160 uint32_t* dst2;
00161 for(j = 0; j < h; j++) {
00162 dst2 = (uint32_t*)dst;
00163 for(i = 0; i < w; i++)
00164 dst2[i] = (dst2[i] & cd[i]) ^ msk[i];
00165 msk += c->cur_w;
00166 cd += c->cur_w;
00167 dst += stride;
00168 }
00169 }
00170 }
00171
00172
00173 static av_always_inline void paint_rect(uint8_t *dst, int dx, int dy, int w, int h, int color, int bpp, int stride)
00174 {
00175 int i, j;
00176 dst += dx * bpp + dy * stride;
00177 if(bpp == 1){
00178 for(j = 0; j < h; j++) {
00179 memset(dst, color, w);
00180 dst += stride;
00181 }
00182 }else if(bpp == 2){
00183 uint16_t* dst2;
00184 for(j = 0; j < h; j++) {
00185 dst2 = (uint16_t*)dst;
00186 for(i = 0; i < w; i++) {
00187 *dst2++ = color;
00188 }
00189 dst += stride;
00190 }
00191 }else if(bpp == 4){
00192 uint32_t* dst2;
00193 for(j = 0; j < h; j++) {
00194 dst2 = (uint32_t*)dst;
00195 for(i = 0; i < w; i++) {
00196 dst2[i] = color;
00197 }
00198 dst += stride;
00199 }
00200 }
00201 }
00202
00203 static av_always_inline void paint_raw(uint8_t *dst, int w, int h, const uint8_t* src, int bpp, int be, int stride)
00204 {
00205 int i, j, p;
00206 for(j = 0; j < h; j++) {
00207 for(i = 0; i < w; i++) {
00208 p = vmnc_get_pixel(src, bpp, be);
00209 src += bpp;
00210 switch(bpp){
00211 case 1:
00212 dst[i] = p;
00213 break;
00214 case 2:
00215 ((uint16_t*)dst)[i] = p;
00216 break;
00217 case 4:
00218 ((uint32_t*)dst)[i] = p;
00219 break;
00220 }
00221 }
00222 dst += stride;
00223 }
00224 }
00225
00226 static int decode_hextile(VmncContext *c, uint8_t* dst, const uint8_t* src, int ssize, int w, int h, int stride)
00227 {
00228 int i, j, k;
00229 int bg = 0, fg = 0, rects, color, flags, xy, wh;
00230 const int bpp = c->bpp2;
00231 uint8_t *dst2;
00232 int bw = 16, bh = 16;
00233 const uint8_t *ssrc=src;
00234
00235 for(j = 0; j < h; j += 16) {
00236 dst2 = dst;
00237 bw = 16;
00238 if(j + 16 > h) bh = h - j;
00239 for(i = 0; i < w; i += 16, dst2 += 16 * bpp) {
00240 if(src - ssrc >= ssize) {
00241 av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n");
00242 return -1;
00243 }
00244 if(i + 16 > w) bw = w - i;
00245 flags = *src++;
00246 if(flags & HT_RAW) {
00247 if(src - ssrc > ssize - bw * bh * bpp) {
00248 av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n");
00249 return -1;
00250 }
00251 paint_raw(dst2, bw, bh, src, bpp, c->bigendian, stride);
00252 src += bw * bh * bpp;
00253 } else {
00254 if(flags & HT_BKG) {
00255 bg = vmnc_get_pixel(src, bpp, c->bigendian); src += bpp;
00256 }
00257 if(flags & HT_FG) {
00258 fg = vmnc_get_pixel(src, bpp, c->bigendian); src += bpp;
00259 }
00260 rects = 0;
00261 if(flags & HT_SUB)
00262 rects = *src++;
00263 color = !!(flags & HT_CLR);
00264
00265 paint_rect(dst2, 0, 0, bw, bh, bg, bpp, stride);
00266
00267 if(src - ssrc > ssize - rects * (color * bpp + 2)) {
00268 av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n");
00269 return -1;
00270 }
00271 for(k = 0; k < rects; k++) {
00272 if(color) {
00273 fg = vmnc_get_pixel(src, bpp, c->bigendian); src += bpp;
00274 }
00275 xy = *src++;
00276 wh = *src++;
00277 paint_rect(dst2, xy >> 4, xy & 0xF, (wh>>4)+1, (wh & 0xF)+1, fg, bpp, stride);
00278 }
00279 }
00280 }
00281 dst += stride * 16;
00282 }
00283 return src - ssrc;
00284 }
00285
00286 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
00287 {
00288 VmncContext * const c = avctx->priv_data;
00289 uint8_t *outptr;
00290 const uint8_t *src = buf;
00291 int dx, dy, w, h, depth, enc, chunks, res, size_left;
00292
00293 c->pic.reference = 1;
00294 c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
00295 if(avctx->reget_buffer(avctx, &c->pic) < 0){
00296 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
00297 return -1;
00298 }
00299
00300 c->pic.key_frame = 0;
00301 c->pic.pict_type = FF_P_TYPE;
00302
00303
00304 if(c->screendta) {
00305 int i;
00306 w = c->cur_w;
00307 if(c->width < c->cur_x + w) w = c->width - c->cur_x;
00308 h = c->cur_h;
00309 if(c->height < c->cur_y + h) h = c->height - c->cur_y;
00310 dx = c->cur_x;
00311 if(dx < 0) {
00312 w += dx;
00313 dx = 0;
00314 }
00315 dy = c->cur_y;
00316 if(dy < 0) {
00317 h += dy;
00318 dy = 0;
00319 }
00320 if((w > 0) && (h > 0)) {
00321 outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
00322 for(i = 0; i < h; i++) {
00323 memcpy(outptr, c->screendta + i * c->cur_w * c->bpp2, w * c->bpp2);
00324 outptr += c->pic.linesize[0];
00325 }
00326 }
00327 }
00328 src += 2;
00329 chunks = AV_RB16(src); src += 2;
00330 while(chunks--) {
00331 dx = AV_RB16(src); src += 2;
00332 dy = AV_RB16(src); src += 2;
00333 w = AV_RB16(src); src += 2;
00334 h = AV_RB16(src); src += 2;
00335 enc = AV_RB32(src); src += 4;
00336 outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
00337 size_left = buf_size - (src - buf);
00338 switch(enc) {
00339 case MAGIC_WMVd:
00340 if(size_left < 2 + w * h * c->bpp2 * 2) {
00341 av_log(avctx, AV_LOG_ERROR, "Premature end of data! (need %i got %i)\n", 2 + w * h * c->bpp2 * 2, size_left);
00342 return -1;
00343 }
00344 src += 2;
00345 c->cur_w = w;
00346 c->cur_h = h;
00347 c->cur_hx = dx;
00348 c->cur_hy = dy;
00349 if((c->cur_hx > c->cur_w) || (c->cur_hy > c->cur_h)) {
00350 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);
00351 c->cur_hx = c->cur_hy = 0;
00352 }
00353 c->curbits = av_realloc(c->curbits, c->cur_w * c->cur_h * c->bpp2);
00354 c->curmask = av_realloc(c->curmask, c->cur_w * c->cur_h * c->bpp2);
00355 c->screendta = av_realloc(c->screendta, c->cur_w * c->cur_h * c->bpp2);
00356 load_cursor(c, src);
00357 src += w * h * c->bpp2 * 2;
00358 break;
00359 case MAGIC_WMVe:
00360 src += 2;
00361 break;
00362 case MAGIC_WMVf:
00363 c->cur_x = dx - c->cur_hx;
00364 c->cur_y = dy - c->cur_hy;
00365 break;
00366 case MAGIC_WMVg:
00367 src += 10;
00368 break;
00369 case MAGIC_WMVh:
00370 src += 4;
00371 break;
00372 case MAGIC_WMVi:
00373 c->pic.key_frame = 1;
00374 c->pic.pict_type = FF_I_TYPE;
00375 depth = *src++;
00376 if(depth != c->bpp) {
00377 av_log(avctx, AV_LOG_INFO, "Depth mismatch. Container %i bpp, Frame data: %i bpp\n", c->bpp, depth);
00378 }
00379 src++;
00380 c->bigendian = *src++;
00381 if(c->bigendian & (~1)) {
00382 av_log(avctx, AV_LOG_INFO, "Invalid header: bigendian flag = %i\n", c->bigendian);
00383 return -1;
00384 }
00385
00386 src += 13;
00387 break;
00388 case MAGIC_WMVj:
00389 src += 2;
00390 break;
00391 case 0x00000000:
00392 if((dx + w > c->width) || (dy + h > c->height)) {
00393 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);
00394 return -1;
00395 }
00396 if(size_left < w * h * c->bpp2) {
00397 av_log(avctx, AV_LOG_ERROR, "Premature end of data! (need %i got %i)\n", w * h * c->bpp2, size_left);
00398 return -1;
00399 }
00400 paint_raw(outptr, w, h, src, c->bpp2, c->bigendian, c->pic.linesize[0]);
00401 src += w * h * c->bpp2;
00402 break;
00403 case 0x00000005:
00404 if((dx + w > c->width) || (dy + h > c->height)) {
00405 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);
00406 return -1;
00407 }
00408 res = decode_hextile(c, outptr, src, size_left, w, h, c->pic.linesize[0]);
00409 if(res < 0)
00410 return -1;
00411 src += res;
00412 break;
00413 default:
00414 av_log(avctx, AV_LOG_ERROR, "Unsupported block type 0x%08X\n", enc);
00415 chunks = 0;
00416 }
00417 }
00418 if(c->screendta){
00419 int i;
00420
00421 w = c->cur_w;
00422 if(c->width < c->cur_x + w) w = c->width - c->cur_x;
00423 h = c->cur_h;
00424 if(c->height < c->cur_y + h) h = c->height - c->cur_y;
00425 dx = c->cur_x;
00426 if(dx < 0) {
00427 w += dx;
00428 dx = 0;
00429 }
00430 dy = c->cur_y;
00431 if(dy < 0) {
00432 h += dy;
00433 dy = 0;
00434 }
00435 if((w > 0) && (h > 0)) {
00436 outptr = c->pic.data[0] + dx * c->bpp2 + dy * c->pic.linesize[0];
00437 for(i = 0; i < h; i++) {
00438 memcpy(c->screendta + i * c->cur_w * c->bpp2, outptr, w * c->bpp2);
00439 outptr += c->pic.linesize[0];
00440 }
00441 outptr = c->pic.data[0];
00442 put_cursor(outptr, c->pic.linesize[0], c, c->cur_x, c->cur_y);
00443 }
00444 }
00445 *data_size = sizeof(AVFrame);
00446 *(AVFrame*)data = c->pic;
00447
00448
00449 return buf_size;
00450 }
00451
00452
00453
00454
00455
00456
00457
00458
00459 static int decode_init(AVCodecContext *avctx)
00460 {
00461 VmncContext * const c = avctx->priv_data;
00462
00463 c->avctx = avctx;
00464
00465 c->pic.data[0] = NULL;
00466 c->width = avctx->width;
00467 c->height = avctx->height;
00468
00469 if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
00470 return 1;
00471 }
00472 c->bpp = avctx->bits_per_sample;
00473 c->bpp2 = c->bpp/8;
00474
00475 switch(c->bpp){
00476 case 8:
00477 avctx->pix_fmt = PIX_FMT_PAL8;
00478 break;
00479 case 16:
00480 avctx->pix_fmt = PIX_FMT_RGB555;
00481 break;
00482 case 32:
00483 avctx->pix_fmt = PIX_FMT_RGB32;
00484 break;
00485 default:
00486 av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", c->bpp);
00487 }
00488
00489 return 0;
00490 }
00491
00492
00493
00494
00495
00496
00497
00498
00499 static int decode_end(AVCodecContext *avctx)
00500 {
00501 VmncContext * const c = avctx->priv_data;
00502
00503 if (c->pic.data[0])
00504 avctx->release_buffer(avctx, &c->pic);
00505
00506 av_free(c->curbits);
00507 av_free(c->curmask);
00508 av_free(c->screendta);
00509 return 0;
00510 }
00511
00512 AVCodec vmnc_decoder = {
00513 "VMware video",
00514 CODEC_TYPE_VIDEO,
00515 CODEC_ID_VMNC,
00516 sizeof(VmncContext),
00517 decode_init,
00518 NULL,
00519 decode_end,
00520 decode_frame
00521 };
00522