libavcodec/ralf.c:371: error: Integer Overflow L2
  ([1, +oo] - [16, 17]):unsigned32 by call to `decode_channel`.

libavcodec/ralf.c:367:5: Assignment
365.     mode[0] = (dmode == 4) ? 1 : 0;
366.     mode[1] = (dmode >= 2) ? 2 : 0;
367.     bits[0] = 16;
         ^
368.     bits[1] = (mode[1] == 2) ? 17 : 16;
369. 

libavcodec/ralf.c:371:20: Call
369. 
370.     for (ch = 0; ch < avctx->channels; ch++) {
371.         if ((ret = decode_channel(ctx, bc, ch, len, mode[ch], bits[ch])) < 0)
                        ^
372.             return ret;
373.         if (ctx->filter_params > 1 && ctx->filter_params != FILTER_RAW) {

libavcodec/ralf.c:229:1: Parameter `bits`
  227. }
  228. 
  229. static int decode_channel(RALFContext *ctx, BitstreamContext *bc, int ch,
       ^
  230.                           int length, int mode, int bits)
  231. {

libavcodec/ralf.c:244:22: Call
  242.     if (ctx->filter_params == FILTER_RAW) {
  243.         for (i = 0; i < length; i++)
  244.             dst[i] = bitstream_read(bc, bits);
                            ^
  245.         ctx->bias[ch] = 0;
  246.         return 0;

libavcodec/bitstream.h:183:1: Parameter `n`
    181. 
    182. /* Return n bits from the buffer. n has to be in the 0-32 range. */
    183. static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)
         ^
    184. {
    185.     if (!n)

libavcodec/bitstream.h:194:12: Call
    192.     }
    193. 
    194.     return get_val(bc, n);
                    ^
    195. }
    196. 

libavcodec/bitstream.h:130:1: <LHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `bc->bits_left`
      128. }
      129. 
      130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
           ^
      131. {
      132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: <RHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `n`
      128. }
      129. 
      130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
           ^
      131. {
      132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:139:5: Binary operation: ([1, +oo] - [16, 17]):unsigned32 by call to `decode_channel` 
      137.     bc->bits <<= n;
      138. #endif
      139.     bc->bits_left -= n;
               ^
      140. 
      141.     return ret;
