indeo: use proper error code

libavcodec/ivi_common.c

@@ -85,7 +85,7 @@ static int ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag)
 
             bits[pos] = i + cb->xbits[i] + not_last_row;
             if (bits[pos] > IVI_VLC_BITS)
-                return -1; /* invalid descriptor */
+                return AVERROR_INVALIDDATA; /* invalid descriptor */
 
             codewords[pos] = inv_bits((prefix | j), bits[pos]);
             if (!bits[pos])
@@ -486,7 +486,7 @@ static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile
                     } else {
                         if (sym >= 256U) {
                             av_log(avctx, AV_LOG_ERROR, "Invalid sym encountered: %d.\n", sym);
-                            return -1;
+                            return AVERROR_INVALIDDATA;
                         }
                         run = rvmap->runtab[sym];
                         val = rvmap->valtab[sym];
@@ -509,7 +509,7 @@ static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile
                 }// while
 
                 if (scan_pos >= num_coeffs && sym != rvmap->eob_sym)
-                    return -1; /* corrupt block data */
+                    return AVERROR_INVALIDDATA; /* corrupt block data */
 
                 /* undoing DC coeff prediction for intra-blocks */
                 if (is_intra && band->is_2d_trans) {
@@ -836,14 +836,14 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     if (result) {
         av_log(avctx, AV_LOG_ERROR,
                "Error while decoding picture header: %d\n", result);
-        return -1;
+        return result;
     }
     if (ctx->gop_invalid)
         return AVERROR_INVALIDDATA;
 
     if (ctx->gop_flags & IVI5_IS_PROTECTED) {
-        av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
-        return -1;
+        avpriv_report_missing_feature(avctx, "Password-protected clip!\n");
+        return AVERROR_PATCHWELCOME;
     }
 
     ctx->switch_buffers(ctx);
@@ -854,10 +854,10 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
         for (p = 0; p < 3; p++) {
             for (b = 0; b < ctx->planes[p].num_bands; b++) {
                 result = decode_band(ctx, &ctx->planes[p].bands[b], avctx);
-                if (result) {
+                if (result < 0) {
                     av_log(avctx, AV_LOG_ERROR,
                            "Error while decoding band: %d, plane: %d\n", b, p);
-                    return -1;
+                    return result;
                 }
             }
         }