Updated FFMPEG to version 1.1.2, using this project: http://sourceforge.net/projects/ffmpeg4android/

project/jni/ffmpeg/libavcodec/vmnc.c

@@ -0,0 +1,533 @@
+/*
+ * 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"
+
+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;
+
+    /* 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(const uint8_t* buf, int bpp, int be) {
+    switch(bpp * 2 + be) {
+    case 2:
+    case 3: return *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;
+    }
+}
+
+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;
+    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, const uint8_t* src, 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(src, bpp, be);
+            src += bpp;
+            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, 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;
+    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 {
+                if(flags & HT_BKG) {
+                    bg = vmnc_get_pixel(src, bpp, c->bigendian); src += bpp;
+                }
+                if(flags & HT_FG) {
+                    fg = vmnc_get_pixel(src, bpp, c->bigendian); src += bpp;
+                }
+                rects = 0;
+                if(flags & HT_SUB)
+                    rects = *src++;
+                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;
+                    }
+                    xy = *src++;
+                    wh = *src++;
+                    paint_rect(dst2, xy >> 4, xy & 0xF, (wh>>4)+1, (wh & 0xF)+1, fg, bpp, stride);
+                }
+            }
+        }
+        dst += stride * 16;
+    }
+    return src - ssrc;
+}
+
+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;
+    uint8_t *outptr;
+    const uint8_t *src = buf;
+    int dx, dy, w, h, depth, enc, chunks, res, size_left;
+
+    c->pic.reference = 3;
+    c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
+    if(avctx->reget_buffer(avctx, &c->pic) < 0){
+        av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+        return -1;
+    }
+
+    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];
+            }
+        }
+    }
+    src += 2;
+    chunks = AV_RB16(src); src += 2;
+    while(chunks--) {
+        if(buf_size - (src - buf) < 12) {
+            av_log(avctx, AV_LOG_ERROR, "Premature end of data!\n");
+            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 (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 -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 = AV_PICTURE_TYPE_I;
+            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
+        }
+    }
+    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;
+    *(AVFrame*)data = c->pic;
+
+    /* always report that the buffer was completely consumed */
+    return buf_size;
+}
+
+
+
+/*
+ *
+ * Init VMnc decoder
+ *
+ */
+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;
+    avcodec_get_frame_defaults(&c->pic);
+
+    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;
+    }
+
+    return 0;
+}
+
+
+
+/*
+ *
+ * Uninit VMnc decoder
+ *
+ */
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+    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 ff_vmnc_decoder = {
+    .name           = "vmnc",
+    .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,
+    .long_name      = NULL_IF_CONFIG_SMALL("VMware Screen Codec / VMware Video"),
+};