1 files changed, 51 insertions, 45 deletions

diff --git a/libavcodec/indeo3.c b/libavcodec/indeo3.c
index a9c02b2..ddb4ad0 100644
--- a/libavcodec/indeo3.c
+++ b/libavcodec/indeo3.c
@@ -2,20 +2,20 @@
  * Indeo Video v3 compatible decoder
  * Copyright (c) 2009 - 2011 Maxim Poliakovski
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * 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.
  *
- * Libav 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 Libav; 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
  */
 
@@ -32,6 +32,7 @@
 #include "libavutil/imgutils.h"
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "copy_block.h"
 #include "bytestream.h"
 #include "get_bits.h"
 #include "hpeldsp.h"
@@ -147,15 +148,26 @@ static av_cold void build_requant_tab(void)
 }
 
 
+static av_cold void free_frame_buffers(Indeo3DecodeContext *ctx)
+{
+    int p;
+
+    ctx->width = ctx->height = 0;
+
+    for (p = 0; p < 3; p++) {
+        av_freep(&ctx->planes[p].buffers[0]);
+        av_freep(&ctx->planes[p].buffers[1]);
+        ctx->planes[p].pixels[0] = ctx->planes[p].pixels[1] = 0;
+    }
+}
+
+
 static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx,
-                                          AVCodecContext *avctx)
+                                          AVCodecContext *avctx, int luma_width, int luma_height)
 {
-    int p, luma_width, luma_height, chroma_width, chroma_height;
+    int p, chroma_width, chroma_height;
     int luma_pitch, chroma_pitch, luma_size, chroma_size;
 
-    luma_width  = ctx->width;
-    luma_height = ctx->height;
-
     if (luma_width  < 16 || luma_width  > 640 ||
         luma_height < 16 || luma_height > 480 ||
         luma_width  &  3 || luma_height &   3) {
@@ -164,6 +176,9 @@ static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx,
         return AVERROR_INVALIDDATA;
     }
 
+    ctx->width  = luma_width ;
+    ctx->height = luma_height;
+
     chroma_width  = FFALIGN(luma_width  >> 2, 4);
     chroma_height = FFALIGN(luma_height >> 2, 4);
 
@@ -187,6 +202,11 @@ static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx,
         ctx->planes[p].buffers[0] = av_malloc(!p ? luma_size : chroma_size);
         ctx->planes[p].buffers[1] = av_malloc(!p ? luma_size : chroma_size);
 
+        if (!ctx->planes[p].buffers[0] || !ctx->planes[p].buffers[1]) {
+            free_frame_buffers(ctx);
+            return AVERROR(ENOMEM);
+        }
+
         /* fill the INTRA prediction lines with the middle pixel value = 64 */
         memset(ctx->planes[p].buffers[0], 0x40, ctx->planes[p].pitch);
         memset(ctx->planes[p].buffers[1], 0x40, ctx->planes[p].pitch);
@@ -201,19 +221,6 @@ static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx,
     return 0;
 }
 
-
-static av_cold void free_frame_buffers(Indeo3DecodeContext *ctx)
-{
-    int p;
-
-    for (p = 0; p < 3; p++) {
-        av_freep(&ctx->planes[p].buffers[0]);
-        av_freep(&ctx->planes[p].buffers[1]);
-        ctx->planes[p].pixels[0] = ctx->planes[p].pixels[1] = 0;
-    }
-}
-
-
 /**
  *  Copy pixels of the cell(x + mv_x, y + mv_y) from the previous frame into
  *  the cell(x, y) in the current frame.
@@ -230,8 +237,11 @@ static int copy_cell(Indeo3DecodeContext *ctx, Plane *plane, Cell *cell)
     /* setup output and reference pointers */
     offset_dst  = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
     dst         = plane->pixels[ctx->buf_sel] + offset_dst;
+    if(cell->mv_ptr){
     mv_y        = cell->mv_ptr[0];
     mv_x        = cell->mv_ptr[1];
+    }else
+        mv_x= mv_y= 0;
 
     /* -1 because there is an extra line on top for prediction */
     if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
@@ -333,7 +343,7 @@ if (*data_ptr >= last_ptr) \
 
 #define RLE_BLOCK_COPY \
     if (cell->mv_ptr || !skip_flag) \
-        ctx->hdsp.put_pixels_tab[2][0](dst, ref, row_offset, 4 << v_zoom)
+        copy_block4(dst, ref, row_offset, row_offset, 4 << v_zoom)
 
 #define RLE_BLOCK_COPY_8 \
     pix64 = AV_RN64(ref);\
@@ -345,7 +355,7 @@ if (*data_ptr >= last_ptr) \
         fill_64(dst, pix64, 8, row_offset)
 
 #define RLE_LINES_COPY \
-    ctx->hdsp.put_pixels_tab[2][0](dst, ref, row_offset, num_lines << v_zoom)
+    copy_block4(dst, ref, row_offset, row_offset, num_lines << v_zoom)
 
 #define RLE_LINES_COPY_M10 \
     pix64 = AV_RN64(ref);\
@@ -589,6 +599,7 @@ static int decode_cell(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
     /* setup output and reference pointers */
     offset = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
     block  =  plane->pixels[ctx->buf_sel] + offset;
+
     if (!cell->mv_ptr) {
         /* use previous line as reference for INTRA cells */
         ref_block = block - plane->pitch;
@@ -643,7 +654,7 @@ static int decode_cell(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
     /* of the predicted cell in order to avoid overflows. */
     if (vq_index >= 8 && ref_block) {
         for (x = 0; x < cell->width << 2; x++)
-            ref_block[x] = requant_tab[vq_index & 7][ref_block[x]];
+            ref_block[x] = requant_tab[vq_index & 7][ref_block[x] & 127];
     }
 
     error = IV3_NOERR;
@@ -771,7 +782,7 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
             return AVERROR_INVALIDDATA;
     }
 
-    while (1) { /* loop until return */
+    while (get_bits_left(&ctx->gb) >= 2) { /* loop until return */
         RESYNC_BITSTREAM;
         switch (code = get_bits(&ctx->gb, 2)) {
         case H_SPLIT:
@@ -796,6 +807,7 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
                 CHECK_CELL
                 if (!curr_cell.mv_ptr)
                     return AVERROR_INVALIDDATA;
+
                 ret = copy_cell(ctx, plane, &curr_cell);
                 return ret;
             }
@@ -806,6 +818,10 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
                 /* get motion vector index and setup the pointer to the mv set */
                 if (!ctx->need_resync)
                     ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
+                if (ctx->next_cell_data >= ctx->last_byte) {
+                    av_log(avctx, AV_LOG_ERROR, "motion vector out of array\n");
+                    return AVERROR_INVALIDDATA;
+                }
                 mv_idx = *(ctx->next_cell_data++);
                 if (mv_idx >= ctx->num_vectors) {
                     av_log(avctx, AV_LOG_ERROR, "motion vector index out of range\n");
@@ -832,7 +848,7 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
         }
     }//while
 
-    return 0;
+    return AVERROR_INVALIDDATA;
 }
 
 
@@ -845,13 +861,13 @@ static int decode_plane(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
 
     /* each plane data starts with mc_vector_count field, */
     /* an optional array of motion vectors followed by the vq data */
-    num_vectors = bytestream_get_le32(&data);
+    num_vectors = bytestream_get_le32(&data); data_size -= 4;
     if (num_vectors > 256) {
         av_log(ctx->avctx, AV_LOG_ERROR,
                "Read invalid number of motion vectors %d\n", num_vectors);
         return AVERROR_INVALIDDATA;
     }
-    if (num_vectors * 2 >= data_size)
+    if (num_vectors * 2 > data_size)
         return AVERROR_INVALIDDATA;
 
     ctx->num_vectors = num_vectors;
@@ -862,7 +878,7 @@ static int decode_plane(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
     ctx->skip_bits   = 0;
     ctx->need_resync = 0;
 
-    ctx->last_byte = data + data_size - 1;
+    ctx->last_byte = data + data_size;
 
     /* initialize the 1st cell and set its dimensions to whole plane */
     curr_cell.xpos   = curr_cell.ypos = 0;
@@ -937,12 +953,8 @@ static int decode_frame_headers(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
                    "Invalid picture dimensions: %d x %d!\n", width, height);
             return AVERROR_INVALIDDATA;
         }
-
-        ctx->width  = width;
-        ctx->height = height;
-
         free_frame_buffers(ctx);
-        if ((res = allocate_frame_buffers(ctx, avctx)) < 0)
+        if ((res = allocate_frame_buffers(ctx, avctx, width, height)) < 0)
              return res;
         ff_set_dimensions(avctx, width, height);
     }
@@ -1039,17 +1051,13 @@ static av_cold int decode_init(AVCodecContext *avctx)
     Indeo3DecodeContext *ctx = avctx->priv_data;
 
     ctx->avctx     = avctx;
-    ctx->width     = avctx->width;
-    ctx->height    = avctx->height;
     avctx->pix_fmt = AV_PIX_FMT_YUV410P;
 
     build_requant_tab();
 
     ff_hpeldsp_init(&ctx->hdsp, avctx->flags);
 
-    allocate_frame_buffers(ctx, avctx);
-
-    return 0;
+    return allocate_frame_buffers(ctx, avctx, avctx->width, avctx->height);
 }
 
 
@@ -1085,6 +1093,9 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     /* use BS_BUFFER flag for buffer switching */
     ctx->buf_sel = (ctx->frame_flags >> BS_BUFFER) & 1;
 
+    if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
+        return res;
+
     /* decode luma plane */
     if ((res = decode_plane(ctx, avctx, ctx->planes, ctx->y_data_ptr, ctx->y_data_size, 40)))
         return res;
@@ -1096,11 +1107,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     if ((res = decode_plane(ctx, avctx, &ctx->planes[2], ctx->v_data_ptr, ctx->v_data_size, 10)))
         return res;
 
-    if ((res = ff_get_buffer(avctx, frame, 0)) < 0) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
-        return res;
-    }
-
     output_plane(&ctx->planes[0], ctx->buf_sel,
                  frame->data[0], frame->linesize[0],
                  avctx->height);