Merge commit 'c6303f8d70c25dd6c6e6486c78bf99c9924e2b6b'

* commit 'c6303f8d70c25dd6c6e6486c78bf99c9924e2b6b':
  yop: simplify/sanitize the decoding loop
  c93: set palette_has_changed.
  bmp: cosmetics, reformat
  hlsenc: Don't duplicate a string constant

Conflicts:
	libavcodec/bmp.c
	tests/ref/fate/yop

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 19 insertions, 33 deletions

diff --git a/libavcodec/yop.c b/libavcodec/yop.c
index 16a2db13e4..337fb88365 100644
--- a/libavcodec/yop.c
+++ b/libavcodec/yop.c
@@ -36,7 +36,6 @@ typedef struct YopDecContext {
     int num_pal_colors;
     int first_color[2];
     int frame_data_length;
-    int row_pos;
 
     uint8_t *low_nibble;
     uint8_t *srcptr;
@@ -177,27 +176,12 @@ static uint8_t yop_get_next_nibble(YopDecContext *s)
     return ret;
 }
 
-/**
- * Take s->dstptr to the next macroblock in sequence.
- */
-static void yop_next_macroblock(YopDecContext *s)
-{
-    // If we are advancing to the next row of macroblocks
-    if (s->row_pos == s->frame.linesize[0] - 2) {
-        s->dstptr  += s->frame.linesize[0];
-        s->row_pos =  0;
-    }else {
-        s->row_pos += 2;
-    }
-    s->dstptr += 2;
-}
-
 static int yop_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                             AVPacket *avpkt)
 {
     YopDecContext *s = avctx->priv_data;
     int tag, firstcolor, is_odd_frame;
-    int ret, i;
+    int ret, i, x, y;
     uint32_t *palette;
 
     if (s->frame.data[0])
@@ -214,12 +198,9 @@ static int yop_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
         return ret;
     }
 
-    s->frame.linesize[0] = avctx->width;
-
     s->dstbuf     = s->frame.data[0];
     s->dstptr     = s->frame.data[0];
     s->srcptr     = avpkt->data + 4;
-    s->row_pos    = 0;
     s->low_nibble = NULL;
 
     is_odd_frame = avpkt->data[0];
@@ -240,23 +221,28 @@ static int yop_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
 
     s->frame.palette_has_changed = 1;
 
-    while (s->dstptr - s->dstbuf <
-           avctx->width * avctx->height &&
-           s->srcptr - avpkt->data < avpkt->size) {
-
-        tag = yop_get_next_nibble(s);
+    for (y = 0; y < avctx->height; y += 2) {
+        for (x = 0; x < avctx->width; x += 2) {
+            if (s->srcptr - avpkt->data >= avpkt->size) {
+                av_log(avctx, AV_LOG_ERROR, "Packet too small.\n");
+                return AVERROR_INVALIDDATA;
+            }
 
-        if (tag != 0xf) {
-            yop_paint_block(s, tag);
-        }else {
             tag = yop_get_next_nibble(s);
-            ret = yop_copy_previous_block(s, tag);
-            if (ret < 0) {
-                avctx->release_buffer(avctx, &s->frame);
-                return ret;
+
+            if (tag != 0xf) {
+                yop_paint_block(s, tag);
+            } else {
+                tag = yop_get_next_nibble(s);
+                ret = yop_copy_previous_block(s, tag);
+                if (ret < 0) {
+                    avctx->release_buffer(avctx, &s->frame);
+                    return ret;
+                }
             }
+            s->dstptr += 2;
         }
-        yop_next_macroblock(s);
+        s->dstptr += 2*s->frame.linesize[0] - x;
     }
 
     *got_frame = 1;