libavcodec/tiertexseqv.c:196: error: Integer Overflow L2
  ([1, +oo] - 2):unsigned32 by call to `bitstream_read`.

libavcodec/tiertexseqv.c:196:22: Call
194.             for (x = 0; x < 256; x += 8) {
195.                 dst = &seq->frame->data[0][y * seq->frame->linesize[0] + x];
196.                 op = bitstream_read(&bc, 2);
                          ^
197.                 switch (op) {
198.                 case 1:

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] - 2):unsigned32 by call to `bitstream_read` 
    137.     bc->bits <<= n;
    138. #endif
    139.     bc->bits_left -= n;
             ^
    140. 
    141.     return ret;

static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
{
#ifdef BITSTREAM_READER_LE
    uint64_t ret = bc->bits & ((UINT64_C(1) << n) - 1);
    bc->bits >>= n;
#else
    uint64_t ret = bc->bits >> (64 - n);
    bc->bits <<= n;
#endif
    bc->bits_left -= n;
    return ret;
}
['static int seqvideo_decode(SeqVideoContext *seq, const unsigned char *data, int data_size)\n{\n    const unsigned char *data_end = data + data_size;\n    BitstreamContext bc;\n    int flags, i, j, x, y, op;\n    unsigned char c[3];\n    unsigned char *dst;\n    uint32_t *palette;\n    flags = *data++;\n    if (flags & 1) {\n        palette = (uint32_t *)seq->frame->data[1];\n        if (data_end - data < 256 * 3)\n            return AVERROR_INVALIDDATA;\n        for (i = 0; i < 256; i++) {\n            for (j = 0; j < 3; j++, data++)\n                c[j] = (*data << 2) | (*data >> 4);\n            palette[i] = AV_RB24(c);\n        }\n        seq->frame->palette_has_changed = 1;\n    }\n    if (flags & 2) {\n        if (data_end - data < 128)\n            return AVERROR_INVALIDDATA;\n        bitstream_init(&bc, data, 128 * 8);\n        data += 128;\n        for (y = 0; y < 128; y += 8)\n            for (x = 0; x < 256; x += 8) {\n                dst = &seq->frame->data[0][y * seq->frame->linesize[0] + x];\n                op = bitstream_read(&bc, 2);\n                switch (op) {\n                case 1:\n                    data = seq_decode_op1(seq, data, data_end, dst);\n                    break;\n                case 2:\n                    data = seq_decode_op2(seq, data, data_end, dst);\n                    break;\n                case 3:\n                    data = seq_decode_op3(seq, data, data_end, dst);\n                    break;\n                }\n                if (!data)\n                    return AVERROR_INVALIDDATA;\n            }\n    }\n    return 0;\n}', 'static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)\n{\n    if (!n)\n        return 0;\n    if (n > bc->bits_left) {\n        refill_32(bc);\n        if (bc->bits_left < 32)\n            bc->bits_left = n;\n    }\n    return get_val(bc, n);\n}', 'static inline uint64_t get_val(BitstreamContext *bc, unsigned n)\n{\n#ifdef BITSTREAM_READER_LE\n    uint64_t ret = bc->bits & ((UINT64_C(1) << n) - 1);\n    bc->bits >>= n;\n#else\n    uint64_t ret = bc->bits >> (64 - n);\n    bc->bits <<= n;\n#endif\n    bc->bits_left -= n;\n    return ret;\n}']