indeo2: return meaningful error codes

libavcodec/indeo2.c

@@ -57,7 +57,7 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
     int t;
 
     if(width&1)
-        return -1;
+        return AVERROR_INVALIDDATA;
 
     /* first line contain absolute values, other lines contain deltas */
     while (out < width){
@@ -65,7 +65,7 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
         if(c >= 0x80) { /* we have a run */
             c -= 0x7F;
             if(out + c*2 > width)
-                return -1;
+                return AVERROR_INVALIDDATA;
             for (i = 0; i < c * 2; i++)
                 dst[out++] = 0x80;
         } else { /* copy two values from table */
@@ -82,7 +82,7 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
             if(c >= 0x80) { /* we have a skip */
                 c -= 0x7F;
                 if(out + c*2 > width)
-                    return -1;
+                    return AVERROR_INVALIDDATA;
                 for (i = 0; i < c * 2; i++) {
                     dst[out] = dst[out - stride];
                     out++;
@@ -112,7 +112,7 @@ static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_
     int t;
 
     if(width&1)
-        return -1;
+        return AVERROR_INVALIDDATA;
 
     for (j = 0; j < height; j++){
         out = 0;
@@ -146,16 +146,16 @@ static int ir2_decode_frame(AVCodecContext *avctx,
     Ir2Context * const s = avctx->priv_data;
     AVFrame *picture = data;
     AVFrame * const p = &s->picture;
-    int start;
+    int start, ret;
 
     if(p->data[0])
         avctx->release_buffer(avctx, p);
 
     p->reference = 1;
     p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
-    if (avctx->reget_buffer(avctx, p)) {
+    if ((ret = avctx->reget_buffer(avctx, p)) < 0) {
         av_log(s->avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
-        return -1;
+        return ret;
     }
 
     start = 48; /* hardcoded for now */