libavformat/matroskadec.c:834: error: Memory Leak
  memory dynamically allocated by call to `av_realloc()` at line 834, column 24 is not reachable after line 834, column 13.

libavformat/matroskadec.c:817:1: start of procedure matroska_decode_buffer()
815. }
816. 
817. static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
     ^
818.                                   MatroskaTrack *track)
819. {

libavformat/matroskadec.c:820:5: 
818.                                   MatroskaTrack *track)
819. {
820.     MatroskaTrackEncoding *encodings = track->encodings.elem;
         ^
821.     uint8_t* data = *buf;
822.     int isize = *buf_size;

libavformat/matroskadec.c:821:5: 
819. {
820.     MatroskaTrackEncoding *encodings = track->encodings.elem;
821.     uint8_t* data = *buf;
         ^
822.     int isize = *buf_size;
823.     uint8_t* pkt_data = NULL;

libavformat/matroskadec.c:822:5: 
820.     MatroskaTrackEncoding *encodings = track->encodings.elem;
821.     uint8_t* data = *buf;
822.     int isize = *buf_size;
         ^
823.     uint8_t* pkt_data = NULL;
824.     int pkt_size = isize;

libavformat/matroskadec.c:823:5: 
821.     uint8_t* data = *buf;
822.     int isize = *buf_size;
823.     uint8_t* pkt_data = NULL;
         ^
824.     int pkt_size = isize;
825.     int result = 0;

libavformat/matroskadec.c:824:5: 
822.     int isize = *buf_size;
823.     uint8_t* pkt_data = NULL;
824.     int pkt_size = isize;
         ^
825.     int result = 0;
826.     int olen;

libavformat/matroskadec.c:825:5: 
823.     uint8_t* pkt_data = NULL;
824.     int pkt_size = isize;
825.     int result = 0;
         ^
826.     int olen;
827. 

libavformat/matroskadec.c:828:5: 
826.     int olen;
827. 
828.     switch (encodings[0].compression.algo) {
         ^
829.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
830.         return encodings[0].compression.settings.size;

libavformat/matroskadec.c:829:5: Switch condition is false. Skipping switch case
827. 
828.     switch (encodings[0].compression.algo) {
829.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
         ^
830.         return encodings[0].compression.settings.size;
831.     case MATROSKA_TRACK_ENCODING_COMP_LZO:

libavformat/matroskadec.c:831:5: Switch condition is true. Entering switch case
829.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
830.         return encodings[0].compression.settings.size;
831.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
         ^
832.         do {
833.             olen = pkt_size *= 3;

libavformat/matroskadec.c:833:13: 
831.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
832.         do {
833.             olen = pkt_size *= 3;
                 ^
834.             pkt_data = av_realloc(pkt_data,
835.                                   pkt_size+LZO_OUTPUT_PADDING);

libavformat/matroskadec.c:834:13: 
832.         do {
833.             olen = pkt_size *= 3;
834.             pkt_data = av_realloc(pkt_data,
                 ^
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);

libavutil/mem.c:94:1: start of procedure av_realloc()
  92. }
  93. 
  94. void *av_realloc(void *ptr, unsigned int size)
      ^
  95. {
  96. #ifdef CONFIG_MEMALIGN_HACK

libavutil/mem.c:101:8: Taking false branch
   99. 
  100.     /* let's disallow possible ambiguous cases */
  101.     if(size > (INT_MAX-16) )
              ^
  102.         return NULL;
  103. 

libavutil/mem.c:110:5: 
  108.     return (char*)realloc((char*)ptr - diff, size + diff) + diff;
  109. #else
  110.     return realloc(ptr, size);
           ^
  111. #endif
  112. }

libavutil/mem.c:112:1: return from a call to av_realloc
  110.     return realloc(ptr, size);
  111. #endif
  112. }
       ^
  113. 
  114. void av_free(void *ptr)

libavformat/matroskadec.c:836:13: Skipping lzo1x_decode(): empty list of specs
834.             pkt_data = av_realloc(pkt_data,
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);
                 ^
837.         } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
838.         if (result)

libavformat/matroskadec.c:837:18: Loop condition is true. Entering loop body
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);
837.         } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
                      ^
838.         if (result)
839.             goto failed;

libavformat/matroskadec.c:837:45: Loop condition is true. Entering loop body
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);
837.         } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
                                                 ^
838.         if (result)
839.             goto failed;

libavformat/matroskadec.c:833:13: 
831.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
832.         do {
833.             olen = pkt_size *= 3;
                 ^
834.             pkt_data = av_realloc(pkt_data,
835.                                   pkt_size+LZO_OUTPUT_PADDING);

libavformat/matroskadec.c:834:13: 
832.         do {
833.             olen = pkt_size *= 3;
834.             pkt_data = av_realloc(pkt_data,
                 ^
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);

libavutil/mem.c:94:1: start of procedure av_realloc()
  92. }
  93. 
  94. void *av_realloc(void *ptr, unsigned int size)
      ^
  95. {
  96. #ifdef CONFIG_MEMALIGN_HACK

libavutil/mem.c:101:8: Taking true branch
   99. 
  100.     /* let's disallow possible ambiguous cases */
  101.     if(size > (INT_MAX-16) )
              ^
  102.         return NULL;
  103. 

libavutil/mem.c:102:9: 
  100.     /* let's disallow possible ambiguous cases */
  101.     if(size > (INT_MAX-16) )
  102.         return NULL;
               ^
  103. 
  104. #ifdef CONFIG_MEMALIGN_HACK

libavutil/mem.c:112:1: return from a call to av_realloc
  110.     return realloc(ptr, size);
  111. #endif
  112. }
       ^
  113. 
  114. void av_free(void *ptr)

static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
                                  MatroskaTrack *track)
{
    MatroskaTrackEncoding *encodings = track->encodings.elem;
    uint8_t* data = *buf;
    int isize = *buf_size;
    uint8_t* pkt_data = NULL;
    int pkt_size = isize;
    int result = 0;
    int olen;
    switch (encodings[0].compression.algo) {
    case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
        return encodings[0].compression.settings.size;
    case MATROSKA_TRACK_ENCODING_COMP_LZO:
        do {
            olen = pkt_size *= 3;
            pkt_data = av_realloc(pkt_data,
                                  pkt_size+LZO_OUTPUT_PADDING);
            result = lzo1x_decode(pkt_data, &olen, data, &isize);
        } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
        if (result)
            goto failed;
        pkt_size -= olen;
        break;
#ifdef CONFIG_ZLIB
    case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
        z_stream zstream = {0};
        if (inflateInit(&zstream) != Z_OK)
            return -1;
        zstream.next_in = data;
        zstream.avail_in = isize;
        do {
            pkt_size *= 3;
            pkt_data = av_realloc(pkt_data, pkt_size);
            zstream.avail_out = pkt_size - zstream.total_out;
            zstream.next_out = pkt_data + zstream.total_out;
            result = inflate(&zstream, Z_NO_FLUSH);
        } while (result==Z_OK && pkt_size<10000000);
        pkt_size = zstream.total_out;
        inflateEnd(&zstream);
        if (result != Z_STREAM_END)
            goto failed;
        break;
    }
#endif
#ifdef CONFIG_BZLIB
    case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
        bz_stream bzstream = {0};
        if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
            return -1;
        bzstream.next_in = data;
        bzstream.avail_in = isize;
        do {
            pkt_size *= 3;
            pkt_data = av_realloc(pkt_data, pkt_size);
            bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
            bzstream.next_out = pkt_data + bzstream.total_out_lo32;
            result = BZ2_bzDecompress(&bzstream);
        } while (result==BZ_OK && pkt_size<10000000);
        pkt_size = bzstream.total_out_lo32;
        BZ2_bzDecompressEnd(&bzstream);
        if (result != BZ_STREAM_END)
            goto failed;
        break;
    }
#endif
    }
    *buf = pkt_data;
    *buf_size = pkt_size;
    return 0;
 failed:
    av_free(pkt_data);
    return -1;
}
['static int matroska_decode_buffer(uint8_t** buf, int* buf_size,\n                                  MatroskaTrack *track)\n{\n    MatroskaTrackEncoding *encodings = track->encodings.elem;\n    uint8_t* data = *buf;\n    int isize = *buf_size;\n    uint8_t* pkt_data = NULL;\n    int pkt_size = isize;\n    int result = 0;\n    int olen;\n    switch (encodings[0].compression.algo) {\n    case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:\n        return encodings[0].compression.settings.size;\n    case MATROSKA_TRACK_ENCODING_COMP_LZO:\n        do {\n            olen = pkt_size *= 3;\n            pkt_data = av_realloc(pkt_data,\n                                  pkt_size+LZO_OUTPUT_PADDING);\n            result = lzo1x_decode(pkt_data, &olen, data, &isize);\n        } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);\n        if (result)\n            goto failed;\n        pkt_size -= olen;\n        break;\n#ifdef CONFIG_ZLIB\n    case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {\n        z_stream zstream = {0};\n        if (inflateInit(&zstream) != Z_OK)\n            return -1;\n        zstream.next_in = data;\n        zstream.avail_in = isize;\n        do {\n            pkt_size *= 3;\n            pkt_data = av_realloc(pkt_data, pkt_size);\n            zstream.avail_out = pkt_size - zstream.total_out;\n            zstream.next_out = pkt_data + zstream.total_out;\n            result = inflate(&zstream, Z_NO_FLUSH);\n        } while (result==Z_OK && pkt_size<10000000);\n        pkt_size = zstream.total_out;\n        inflateEnd(&zstream);\n        if (result != Z_STREAM_END)\n            goto failed;\n        break;\n    }\n#endif\n#ifdef CONFIG_BZLIB\n    case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {\n        bz_stream bzstream = {0};\n        if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)\n            return -1;\n        bzstream.next_in = data;\n        bzstream.avail_in = isize;\n        do {\n            pkt_size *= 3;\n            pkt_data = av_realloc(pkt_data, pkt_size);\n            bzstream.avail_out = pkt_size - bzstream.total_out_lo32;\n            bzstream.next_out = pkt_data + bzstream.total_out_lo32;\n            result = BZ2_bzDecompress(&bzstream);\n        } while (result==BZ_OK && pkt_size<10000000);\n        pkt_size = bzstream.total_out_lo32;\n        BZ2_bzDecompressEnd(&bzstream);\n        if (result != BZ_STREAM_END)\n            goto failed;\n        break;\n    }\n#endif\n    }\n    *buf = pkt_data;\n    *buf_size = pkt_size;\n    return 0;\n failed:\n    av_free(pkt_data);\n    return -1;\n}', 'void *av_realloc(void *ptr, unsigned int size)\n{\n#ifdef CONFIG_MEMALIGN_HACK\n    int diff;\n#endif\n    if(size > (INT_MAX-16) )\n        return NULL;\n#ifdef CONFIG_MEMALIGN_HACK\n    if(!ptr) return av_malloc(size);\n    diff= ((char*)ptr)[-1];\n    return (char*)realloc((char*)ptr - diff, size + diff) + diff;\n#else\n    return realloc(ptr, size);\n#endif\n}']