Initial commit of all previous Chrome build scripts.

chromium/patches/to_upstream/39_VP8_fix_oob_read_writes.patch

+Index: a/libavcodec/vp8.c
+===================================================================
+--- a/libavcodec/vp8.c (revision 105133)
++++ b/libavcodec/vp8.c (working copy)
+@@ -33,6 +33,19 @@
+ #   include "arm/vp8.h"
+ #endif
+ 
++static void free_buffers(VP8Context *s)
++{
++    av_freep(&s->macroblocks_base);
++    av_freep(&s->filter_strength);
++    av_freep(&s->intra4x4_pred_mode_top);
++    av_freep(&s->top_nnz);
++    av_freep(&s->edge_emu_buffer);
++    av_freep(&s->top_border);
++    av_freep(&s->segmentation_map);
++
++    s->macroblocks        = NULL;
++}
++
+ static void vp8_decode_flush(AVCodecContext *avctx)
+ {
+     VP8Context *s = avctx->priv_data;
+@@ -45,15 +58,7 @@
+     }
+     memset(s->framep, 0, sizeof(s->framep));
+ 
+-    av_freep(&s->macroblocks_base);
+-    av_freep(&s->filter_strength);
+-    av_freep(&s->intra4x4_pred_mode_top);
+-    av_freep(&s->top_nnz);
+-    av_freep(&s->edge_emu_buffer);
+-    av_freep(&s->top_border);
+-    av_freep(&s->segmentation_map);
+-
+-    s->macroblocks        = NULL;
++    free_buffers(s);
+ }
+ 
+ static int update_dimensions(VP8Context *s, int width, int height)
+@@ -273,7 +278,7 @@
+ 
+     if (!s->macroblocks_base || /* first frame */
+         width != s->avctx->width || height != s->avctx->height) {
+-        if ((ret = update_dimensions(s, width, height) < 0))
++        if ((ret = update_dimensions(s, width, height)) < 0)
+             return ret;
+     }
+ 
+@@ -487,6 +492,7 @@
+ 
+     AV_ZERO32(&near_mv[0]);
+     AV_ZERO32(&near_mv[1]);
++    AV_ZERO32(&near_mv[2]);
+ 
+     /* Process MB on top, left and top-left */
+     #define MV_EDGE_CHECK(n)\
+@@ -1749,6 +1755,11 @@
+ {
+     VP8Context *s = dst->priv_data, *s_src = src->priv_data;
+ 
++    if (s->macroblocks_base &&
++        (s_src->mb_width != s->mb_width || s_src->mb_height != s->mb_height)) {
++        free_buffers(s);
++    }
++
+     s->prob[0] = s_src->prob[!s_src->update_probabilities];
+     s->segmentation = s_src->segmentation;
+     s->lf_delta = s_src->lf_delta;
+Index: a/libavcodec/pthread.c
+===================================================================
+--- a/libavcodec/pthread.c (revision 105133)
++++ b/libavcodec/pthread.c (working copy)
+@@ -332,6 +332,9 @@
+         dst->height    = src->height;
+         dst->pix_fmt   = src->pix_fmt;
+ 
++        dst->coded_width  = src->coded_width;
++        dst->coded_height = src->coded_height;
++
+         dst->has_b_frames = src->has_b_frames;
+         dst->idct_algo    = src->idct_algo;
+         dst->slice_count  = src->slice_count;
+@@ -630,7 +633,7 @@
+ 
+     park_frame_worker_threads(fctx, thread_count);
+ 
+-    if (fctx->prev_thread)
++    if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
+         update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
+ 
+     fctx->die = 1;