v210dec: return meaningful error codes

libavcodec/v210dec.c

@@ -31,7 +31,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
 {
     if (avctx->width & 1) {
         av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     avctx->pix_fmt             = AV_PIX_FMT_YUV422P10;
     avctx->bits_per_raw_sample = 10;
@@ -46,7 +46,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                         AVPacket *avpkt)
 {
-    int h, w;
+    int h, w, ret;
     AVFrame *pic = avctx->coded_frame;
     const uint8_t *psrc = avpkt->data;
     uint16_t *y, *u, *v;
@@ -58,12 +58,12 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
 
     if (avpkt->size < stride * avctx->height) {
         av_log(avctx, AV_LOG_ERROR, "packet too small\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     pic->reference = 0;
-    if (ff_get_buffer(avctx, pic) < 0)
-        return -1;
+    if ((ret = ff_get_buffer(avctx, pic)) < 0)
+        return ret;
 
     y = (uint16_t*)pic->data[0];
     u = (uint16_t*)pic->data[1];