1 files changed, 26 insertions, 16 deletions

diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c
index 5dd2a2d5ca..68232e28e3 100644
--- a/libavcodec/qpeg.c
+++ b/libavcodec/qpeg.c
@@ -2,20 +2,20 @@
  * QPEG codec
  * Copyright (c) 2004 Konstantin Shishkov
  *
- * 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
  */
 
@@ -28,8 +28,7 @@
 
 typedef struct QpegContext{
     AVCodecContext *avctx;
-    AVFrame pic;
-    uint8_t *refdata;
+    AVFrame pic, ref;
     uint32_t pal[256];
 } QpegContext;
 
@@ -124,9 +123,12 @@ static void qpeg_decode_inter(const uint8_t *src, uint8_t *dst, int size,
     int filled = 0;
     int orig_height;
 
+    if(!refdata)
+        refdata= dst;
+
     /* copy prev frame */
     for(i = 0; i < height; i++)
-        memcpy(refdata + (i * width), dst + (i * stride), width);
+        memcpy(dst + (i * stride), refdata + (i * stride), width);
 
     orig_height = height;
     height--;
@@ -172,10 +174,10 @@ static void qpeg_decode_inter(const uint8_t *src, uint8_t *dst, int size,
                                me_x, me_y, me_w, me_h, filled, height);
                     else {
                         /* do motion compensation */
-                        me_plane = refdata + (filled + me_x) + (height - me_y) * width;
+                        me_plane = refdata + (filled + me_x) + (height - me_y) * stride;
                         for(j = 0; j < me_h; j++) {
                             for(i = 0; i < me_w; i++)
-                                dst[filled + i - (j * stride)] = me_plane[i - (j * width)];
+                                dst[filled + i - (j * stride)] = me_plane[i - (j * stride)];
                         }
                     }
                 }
@@ -254,14 +256,19 @@ static int decode_frame(AVCodecContext *avctx,
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     QpegContext * const a = avctx->priv_data;
-    AVFrame * const p= (AVFrame*)&a->pic;
+    AVFrame * p= (AVFrame*)&a->pic;
+    AVFrame * ref= (AVFrame*)&a->ref;
     uint8_t* outdata;
     int delta;
     const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
 
-    p->reference = 3;
-    if (avctx->reget_buffer(avctx, p) < 0) {
-        av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+    if(ref->data[0])
+        avctx->release_buffer(avctx, ref);
+    FFSWAP(AVFrame, *ref, *p);
+
+    p->reference= 3;
+    if(avctx->get_buffer(avctx, p) < 0){
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return -1;
     }
     outdata = a->pic.data[0];
@@ -269,7 +276,7 @@ static int decode_frame(AVCodecContext *avctx,
         qpeg_decode_intra(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height);
     } else {
         delta = buf[0x85];
-        qpeg_decode_inter(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height, delta, buf + 4, a->refdata);
+        qpeg_decode_inter(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height, delta, buf + 4, a->ref.data[0]);
     }
 
     /* make the palette available on the way out */
@@ -288,9 +295,10 @@ static int decode_frame(AVCodecContext *avctx,
 static av_cold int decode_init(AVCodecContext *avctx){
     QpegContext * const a = avctx->priv_data;
 
+    avcodec_get_frame_defaults(&a->pic);
+    avcodec_get_frame_defaults(&a->ref);
     a->avctx = avctx;
     avctx->pix_fmt= PIX_FMT_PAL8;
-    a->refdata = av_malloc(avctx->width * avctx->height);
 
     return 0;
 }
@@ -298,11 +306,13 @@ static av_cold int decode_init(AVCodecContext *avctx){
 static av_cold int decode_end(AVCodecContext *avctx){
     QpegContext * const a = avctx->priv_data;
     AVFrame * const p= (AVFrame*)&a->pic;
+    AVFrame * const ref= (AVFrame*)&a->ref;
 
     if(p->data[0])
         avctx->release_buffer(avctx, p);
+    if(ref->data[0])
+        avctx->release_buffer(avctx, ref);
 
-    av_free(a->refdata);
     return 0;
 }