diff --git a/.gitignore b/.gitignore
index 0b00f07e50..a2d19358a9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,8 +38,8 @@
 /doc/examples/muxing
 /doc/examples/scaling_video
 /doc/fate.txt
+/doc/doxy/html/
 /doc/print_options
-/doxy/
 /libavcodec/*_tablegen
 /libavcodec/*_tables.c
 /libavcodec/*_tables.h
diff --git a/Doxyfile b/doc/Doxyfile
similarity index 99%
rename from Doxyfile
rename to doc/Doxyfile
index b91f351800..4d2ba333d0 100644
--- a/Doxyfile
+++ b/doc/Doxyfile
@@ -44,7 +44,7 @@ PROJECT_LOGO           =
 # If a relative path is entered, it will be relative to the location
 # where doxygen was started. If left blank the current directory will be used.
 
-OUTPUT_DIRECTORY       = doxy
+OUTPUT_DIRECTORY       = doc/doxy
 
 # If the CREATE_SUBDIRS tag is set to YES, then doxygen will create
 # 4096 sub-directories (in 2 levels) under the output directory of each output
diff --git a/libavcodec/atrac3.c b/libavcodec/atrac3.c
index 02047ef5f9..abc2927840 100644
--- a/libavcodec/atrac3.c
+++ b/libavcodec/atrac3.c
@@ -913,6 +913,7 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
     } else {
         av_log(NULL, AV_LOG_ERROR, "Unknown extradata size %d.\n",
                avctx->extradata_size);
+        return AVERROR(EINVAL);
     }
 
     /* Check the extradata */
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 8ee08148b5..0374de47f2 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1607,6 +1607,8 @@ typedef struct AVCodecContext {
     int ticks_per_frame;
 
     /**
+     * Codec delay.
+     *
      * Encoding: Number of frames delay there will be from the encoder input to
      *           the decoder output. (we assume the decoder matches the spec)
      * Decoding: Number of frames delay in addition to what a standard decoder
diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c
index 94a4265362..42c37c831f 100644
--- a/libavcodec/dfa.c
+++ b/libavcodec/dfa.c
@@ -45,7 +45,7 @@ static av_cold int dfa_decode_init(AVCodecContext *avctx)
 
     av_assert0(av_image_check_size(avctx->width, avctx->height, 0, avctx) >= 0);
 
-    s->frame_buf = av_mallocz(avctx->width * avctx->height + AV_LZO_OUTPUT_PADDING);
+    s->frame_buf = av_mallocz(avctx->width * avctx->height);
     if (!s->frame_buf)
         return AVERROR(ENOMEM);
 
@@ -126,9 +126,7 @@ static int decode_dsw1(GetByteContext *gb, uint8_t *frame, int width, int height
             count = ((v >> 13) + 2) << 1;
             if (frame - frame_start < offset || frame_end - frame < count)
                 return AVERROR_INVALIDDATA;
-            // can't use av_memcpy_backptr() since it can overwrite following pixels
-            for (v = 0; v < count; v++)
-                frame[v] = frame[v - offset];
+            av_memcpy_backptr(frame, offset, count);
             frame += count;
         } else if (bitbuf & (mask << 1)) {
             frame += bytestream2_get_le16(gb);
diff --git a/libavcodec/eatgv.c b/libavcodec/eatgv.c
index 69e74ca2a4..c986c14e64 100644
--- a/libavcodec/eatgv.c
+++ b/libavcodec/eatgv.c
@@ -301,8 +301,7 @@ static int tgv_decode_frame(AVCodecContext *avctx,
         s->frame.buffer_hints = FF_BUFFER_HINTS_VALID;
         s->frame.linesize[0] = s->width;
 
-        /* allocate additional 12 bytes to accommodate av_memcpy_backptr() OUTBUF_PADDED optimisation */
-        s->frame.data[0] = av_malloc(s->width*s->height + 12);
+        s->frame.data[0] = av_malloc(s->width * s->height);
         if (!s->frame.data[0])
             return AVERROR(ENOMEM);
         s->frame.data[1] = av_malloc(AVPALETTE_SIZE);
diff --git a/libavcodec/lcldec.c b/libavcodec/lcldec.c
index ab188e28da..475ffdd55a 100644
--- a/libavcodec/lcldec.c
+++ b/libavcodec/lcldec.c
@@ -482,7 +482,8 @@ static av_cold int decode_init(AVCodecContext *avctx)
 {
     LclDecContext * const c = avctx->priv_data;
     unsigned int basesize = avctx->width * avctx->height;
-    unsigned int max_basesize = FFALIGN(avctx->width, 4) * FFALIGN(avctx->height, 4) + AV_LZO_OUTPUT_PADDING;
+    unsigned int max_basesize = FFALIGN(avctx->width,  4) *
+                                FFALIGN(avctx->height, 4);
     unsigned int max_decomp_size;
 
     avcodec_get_frame_defaults(&c->pic);
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index c7c7c44fa3..8e7dc0f869 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1328,7 +1328,7 @@ end:
     return ret;
 }
 
-#if FF_API_OLD_DECODE_AUDIO
+#if FF_API_OLD_ENCODE_AUDIO
 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
                                              uint8_t *buf, int buf_size,
                                              const short *samples)