diff options
Diffstat (limited to 'ffmpeg/libavcodec/vmnc.c')
| -rw-r--r-- | ffmpeg/libavcodec/vmnc.c | 572 |
1 files changed, 0 insertions, 572 deletions
diff --git a/ffmpeg/libavcodec/vmnc.c b/ffmpeg/libavcodec/vmnc.c deleted file mode 100644 index 5f91ab1..0000000 --- a/ffmpeg/libavcodec/vmnc.c +++ /dev/null @@ -1,572 +0,0 @@ -/* - * VMware Screen Codec (VMnc) decoder - * Copyright (c) 2006 Konstantin Shishkov - * - * 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 2.1 of the License, or (at your option) any later version. - * - * 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * VMware Screen Codec (VMnc) decoder - * As Alex Beregszaszi discovered, this is effectively RFB data dump - */ - -#include <stdio.h> -#include <stdlib.h> - -#include "libavutil/common.h" -#include "libavutil/intreadwrite.h" -#include "avcodec.h" -#include "internal.h" -#include "bytestream.h" - -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 - HT_BKG = 2, // background color is present - HT_FG = 4, // foreground color is present - HT_SUB = 8, // subrects are present - HT_CLR = 16 // each subrect has own color -}; - -/* - * Decoder context - */ -typedef struct VmncContext { - AVCodecContext *avctx; - AVFrame *pic; - - int bpp; - int bpp2; - int bigendian; - uint8_t pal[768]; - int width, height; - GetByteContext gb; - - /* 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 av_always_inline int vmnc_get_pixel(GetByteContext *gb, int bpp, int be) -{ - switch (bpp * 2 + be) { - case 2: - case 3: - return bytestream2_get_byte(gb); - case 4: - return bytestream2_get_le16(gb); - case 5: - return bytestream2_get_be16(gb); - case 8: - return bytestream2_get_le32(gb); - case 9: - return bytestream2_get_be32(gb); - default: return 0; - } -} - -static void load_cursor(VmncContext *c) -{ - 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(&c->gb, bpp, c->bigendian); - 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(&c->gb, bpp, c->bigendian); - 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; - if (bpp == 1) { - for (j = 0; j < h; j++) { - memset(dst, color, w); - dst += stride; - } - } else if (bpp == 2) { - uint16_t *dst2; - for (j = 0; j < h; j++) { - dst2 = (uint16_t*)dst; - for (i = 0; i < w; i++) - *dst2++ = color; - dst += stride; - } - } else if (bpp == 4) { - uint32_t *dst2; - for (j = 0; j < h; j++) { - dst2 = (uint32_t*)dst; - for (i = 0; i < w; i++) - dst2[i] = color; - dst += stride; - } - } -} - -static av_always_inline void paint_raw(uint8_t *dst, int w, int h, - GetByteContext *gb, int bpp, - int be, int stride) -{ - int i, j, p; - for (j = 0; j < h; j++) { - for (i = 0; i < w; i++) { - p = vmnc_get_pixel(gb, bpp, be); - switch (bpp) { - case 1: - dst[i] = p; - break; - case 2: - ((uint16_t*)dst)[i] = p; - break; - case 4: - ((uint32_t*)dst)[i] = p; - break; - } - } - dst += stride; - } -} - -static int decode_hextile(VmncContext *c, uint8_t* dst, GetByteContext *gb, - 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; - - 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 (bytestream2_get_bytes_left(gb) <= 0) { - av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); - return AVERROR_INVALIDDATA; - } - if (i + 16 > w) - bw = w - i; - flags = bytestream2_get_byte(gb); - if (flags & HT_RAW) { - if (bytestream2_get_bytes_left(gb) < bw * bh * bpp) { - av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); - return AVERROR_INVALIDDATA; - } - paint_raw(dst2, bw, bh, gb, bpp, c->bigendian, stride); - } else { - if (flags & HT_BKG) - bg = vmnc_get_pixel(gb, bpp, c->bigendian); - if (flags & HT_FG) - fg = vmnc_get_pixel(gb, bpp, c->bigendian); - rects = 0; - if (flags & HT_SUB) - rects = bytestream2_get_byte(gb); - color = !!(flags & HT_CLR); - - paint_rect(dst2, 0, 0, bw, bh, bg, bpp, stride); - - if (bytestream2_get_bytes_left(gb) < rects * (color * bpp + 2)) { - av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); - return AVERROR_INVALIDDATA; - } - for (k = 0; k < rects; k++) { - if (color) - fg = vmnc_get_pixel(gb, bpp, c->bigendian); - xy = bytestream2_get_byte(gb); - wh = bytestream2_get_byte(gb); - paint_rect(dst2, xy >> 4, xy & 0xF, - (wh>>4)+1, (wh & 0xF)+1, fg, bpp, stride); - } - } - } - dst += stride * 16; - } - return 0; -} - -static void reset_buffers(VmncContext *c) -{ - av_freep(&c->curbits); - av_freep(&c->curmask); - av_freep(&c->screendta); - c->cur_w = c->cur_h = 0; - c->cur_hx = c->cur_hy = 0; - -} - -static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - VmncContext * const c = avctx->priv_data; - GetByteContext *gb = &c->gb; - uint8_t *outptr; - int dx, dy, w, h, depth, enc, chunks, res, size_left, ret; - - if ((ret = ff_reget_buffer(avctx, c->pic)) < 0) - return ret; - - bytestream2_init(gb, buf, buf_size); - - c->pic->key_frame = 0; - c->pic->pict_type = AV_PICTURE_TYPE_P; - - // 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; - } - 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(outptr, c->screendta + i * c->cur_w * c->bpp2, - w * c->bpp2); - outptr += c->pic->linesize[0]; - } - } - } - bytestream2_skip(gb, 2); - chunks = bytestream2_get_be16(gb); - while (chunks--) { - if (bytestream2_get_bytes_left(gb) < 12) { - av_log(avctx, AV_LOG_ERROR, "Premature end of data!\n"); - return -1; - } - dx = bytestream2_get_be16(gb); - dy = bytestream2_get_be16(gb); - w = bytestream2_get_be16(gb); - h = bytestream2_get_be16(gb); - enc = bytestream2_get_be32(gb); - outptr = c->pic->data[0] + dx * c->bpp2 + dy * c->pic->linesize[0]; - size_left = bytestream2_get_bytes_left(gb); - switch (enc) { - case MAGIC_WMVd: // cursor - if (w*(int64_t)h*c->bpp2 > INT_MAX/2 - 2) { - av_log(avctx, AV_LOG_ERROR, "dimensions too large\n"); - return AVERROR_INVALIDDATA; - } - 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 AVERROR_INVALIDDATA; - } - bytestream2_skip(gb, 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; - } - if (c->cur_w * c->cur_h >= INT_MAX / c->bpp2) { - reset_buffers(c); - return AVERROR(EINVAL); - } else { - int screen_size = c->cur_w * c->cur_h * c->bpp2; - if ((ret = av_reallocp(&c->curbits, screen_size)) < 0 || - (ret = av_reallocp(&c->curmask, screen_size)) < 0 || - (ret = av_reallocp(&c->screendta, screen_size)) < 0) { - reset_buffers(c); - return ret; - } - } - load_cursor(c); - break; - case MAGIC_WMVe: // unknown - bytestream2_skip(gb, 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 - bytestream2_skip(gb, 10); - break; - case MAGIC_WMVh: // unknown - bytestream2_skip(gb, 4); - break; - case MAGIC_WMVi: // ServerInitialization struct - c->pic->key_frame = 1; - c->pic->pict_type = AV_PICTURE_TYPE_I; - depth = bytestream2_get_byte(gb); - if (depth != c->bpp) { - av_log(avctx, AV_LOG_INFO, - "Depth mismatch. Container %i bpp, " - "Frame data: %i bpp\n", - c->bpp, depth); - } - bytestream2_skip(gb, 1); - c->bigendian = bytestream2_get_byte(gb); - if (c->bigendian & (~1)) { - av_log(avctx, AV_LOG_INFO, - "Invalid header: bigendian flag = %i\n", c->bigendian); - return AVERROR_INVALIDDATA; - } - //skip the rest of pixel format data - bytestream2_skip(gb, 13); - break; - case MAGIC_WMVj: // unknown - bytestream2_skip(gb, 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 AVERROR_INVALIDDATA; - } - 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 AVERROR_INVALIDDATA; - } - paint_raw(outptr, w, h, gb, c->bpp2, c->bigendian, - c->pic->linesize[0]); - 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 AVERROR_INVALIDDATA; - } - res = decode_hextile(c, outptr, gb, w, h, c->pic->linesize[0]); - if (res < 0) - return res; - break; - default: - av_log(avctx, AV_LOG_ERROR, "Unsupported block type 0x%08X\n", enc); - chunks = 0; // leave chunks decoding loop - } - } - 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]; - } - outptr = c->pic->data[0]; - put_cursor(outptr, c->pic->linesize[0], c, c->cur_x, c->cur_y); - } - } - *got_frame = 1; - if ((ret = av_frame_ref(data, c->pic)) < 0) - return ret; - - /* always report that the buffer was completely consumed */ - return buf_size; -} - -static av_cold int decode_init(AVCodecContext *avctx) -{ - VmncContext * const c = avctx->priv_data; - - c->avctx = avctx; - c->width = avctx->width; - c->height = avctx->height; - c->bpp = avctx->bits_per_coded_sample; - c->bpp2 = c->bpp / 8; - - switch (c->bpp) { - case 8: - avctx->pix_fmt = AV_PIX_FMT_PAL8; - break; - case 16: - avctx->pix_fmt = AV_PIX_FMT_RGB555; - break; - case 32: - avctx->pix_fmt = AV_PIX_FMT_RGB32; - break; - default: - av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", c->bpp); - return AVERROR_INVALIDDATA; - } - - c->pic = av_frame_alloc(); - if (!c->pic) - return AVERROR(ENOMEM); - - return 0; -} - -static av_cold int decode_end(AVCodecContext *avctx) -{ - VmncContext * const c = avctx->priv_data; - - av_frame_free(&c->pic); - - av_freep(&c->curbits); - av_freep(&c->curmask); - av_freep(&c->screendta); - return 0; -} - -AVCodec ff_vmnc_decoder = { - .name = "vmnc", - .long_name = NULL_IF_CONFIG_SMALL("VMware Screen Codec / VMware Video"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_VMNC, - .priv_data_size = sizeof(VmncContext), - .init = decode_init, - .close = decode_end, - .decode = decode_frame, - .capabilities = CODEC_CAP_DR1, -}; |