truemotion1: return meaningful error codes

libavcodec/truemotion1.c

@@ -308,7 +308,7 @@ static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_
  * there was an error while decoding the header */
 static int truemotion1_decode_header(TrueMotion1Context *s)
 {
-    int i;
+    int i, ret;
     int width_shift = 0;
     int new_pix_fmt;
     struct frame_header header;
@@ -319,7 +319,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
     if (s->buf[0] < 0x10)
     {
         av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     /* unscramble the header bytes with a XOR operation */
@@ -343,7 +343,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
         if (header.header_type > 3)
         {
             av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
-            return -1;
+            return AVERROR_INVALIDDATA;
         } else if ((header.header_type == 2) || (header.header_type == 3)) {
             s->flags = header.flags;
             if (!(s->flags & FLAG_INTERFRAME))
@@ -371,7 +371,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
 
     if (header.compression >= 17) {
         av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     if ((header.deltaset != s->last_deltaset) ||
@@ -385,7 +385,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
             sel_vector_table = tables[header.vectable - 1];
         else {
             av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
-            return -1;
+            return AVERROR_INVALIDDATA;
         }
     }
 
@@ -396,8 +396,8 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
         new_pix_fmt = AV_PIX_FMT_RGB555; // RGB565 is supported as well
 
     s->w >>= width_shift;
-    if (av_image_check_size(s->w, s->h, 0, s->avctx) < 0)
-        return -1;
+    if ((ret = av_image_check_size(s->w, s->h, 0, s->avctx)) < 0)
+        return ret;
 
     if (s->w != s->avctx->width || s->h != s->avctx->height ||
         new_pix_fmt != s->avctx->pix_fmt) {
@@ -843,21 +843,21 @@ static int truemotion1_decode_frame(AVCodecContext *avctx,
                                     AVPacket *avpkt)
 {
     const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
+    int ret, buf_size = avpkt->size;
     TrueMotion1Context *s = avctx->priv_data;
 
     s->buf = buf;
     s->size = buf_size;
 
-    if (truemotion1_decode_header(s) == -1)
-        return -1;
+    if ((ret = truemotion1_decode_header(s)) < 0)
+        return ret;
 
     s->frame.reference = 1;
     s->frame.buffer_hints = FF_BUFFER_HINTS_VALID |
         FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
-    if (avctx->reget_buffer(avctx, &s->frame) < 0) {
+    if ((ret = avctx->reget_buffer(avctx, &s->frame)) < 0) {
         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
-        return -1;
+        return ret;
     }
 
     if (compression_types[s->compression].algorithm == ALGO_RGB24H) {