libavcodec/h264_mp4toannexb_bsf.c:95: error: Memory Leak
  memory dynamically allocated by call to `av_realloc()` at line 95, column 19 is not reachable after line 95, column 13.

libavcodec/h264_mp4toannexb_bsf.c:51:1: start of procedure h264_mp4toannexb_filter()
49. }
50. 
51. static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
    ^
52.                                    AVCodecContext *avctx, const char *args,
53.                                    uint8_t  **poutbuf, int *poutbuf_size,

libavcodec/h264_mp4toannexb_bsf.c:56:5: 
54.                                    const uint8_t *buf, int      buf_size,
55.                                    int keyframe) {
56.     H264BSFContext *ctx = bsfc->priv_data;
        ^
57.     uint8_t unit_type;
58.     int32_t nal_size;

libavcodec/h264_mp4toannexb_bsf.c:59:5: 
57.     uint8_t unit_type;
58.     int32_t nal_size;
59.     uint32_t cumul_size = 0;
        ^
60.     const uint8_t *buf_end = buf + buf_size;
61. 

libavcodec/h264_mp4toannexb_bsf.c:60:5: 
58.     int32_t nal_size;
59.     uint32_t cumul_size = 0;
60.     const uint8_t *buf_end = buf + buf_size;
        ^
61. 
62.     /* nothing to filter */

libavcodec/h264_mp4toannexb_bsf.c:63:10: Taking false branch
61. 
62.     /* nothing to filter */
63.     if (!avctx->extradata || avctx->extradata_size < 6) {
             ^
64.         *poutbuf = (uint8_t*) buf;
65.         *poutbuf_size = buf_size;

libavcodec/h264_mp4toannexb_bsf.c:63:30: Taking false branch
61. 
62.     /* nothing to filter */
63.     if (!avctx->extradata || avctx->extradata_size < 6) {
                                 ^
64.         *poutbuf = (uint8_t*) buf;
65.         *poutbuf_size = buf_size;

libavcodec/h264_mp4toannexb_bsf.c:70:10: Taking true branch
68. 
69.     /* retrieve sps and pps NAL units from extradata */
70.     if (!ctx->sps_pps_data) {
             ^
71.         uint16_t unit_size;
72.         uint32_t total_size = 0;

libavcodec/h264_mp4toannexb_bsf.c:72:9: 
70.     if (!ctx->sps_pps_data) {
71.         uint16_t unit_size;
72.         uint32_t total_size = 0;
            ^
73.         uint8_t *out = NULL, unit_nb, sps_done = 0;
74.         const uint8_t *extradata = avctx->extradata+4;

libavcodec/h264_mp4toannexb_bsf.c:73:9: 
71.         uint16_t unit_size;
72.         uint32_t total_size = 0;
73.         uint8_t *out = NULL, unit_nb, sps_done = 0;
            ^
74.         const uint8_t *extradata = avctx->extradata+4;
75.         static const uint8_t nalu_header[4] = {0, 0, 0, 1};

libavcodec/h264_mp4toannexb_bsf.c:74:9: 
72.         uint32_t total_size = 0;
73.         uint8_t *out = NULL, unit_nb, sps_done = 0;
74.         const uint8_t *extradata = avctx->extradata+4;
            ^
75.         static const uint8_t nalu_header[4] = {0, 0, 0, 1};
76. 

libavcodec/h264_mp4toannexb_bsf.c:75:9: 
73.         uint8_t *out = NULL, unit_nb, sps_done = 0;
74.         const uint8_t *extradata = avctx->extradata+4;
75.         static const uint8_t nalu_header[4] = {0, 0, 0, 1};
            ^
76. 
77.         /* retrieve length coded size */

libavcodec/h264_mp4toannexb_bsf.c:78:9: 
76. 
77.         /* retrieve length coded size */
78.         ctx->length_size = (*extradata++ & 0x3) + 1;
            ^
79.         if (ctx->length_size == 3)
80.             return AVERROR(EINVAL);

libavcodec/h264_mp4toannexb_bsf.c:79:13: Taking false branch
77.         /* retrieve length coded size */
78.         ctx->length_size = (*extradata++ & 0x3) + 1;
79.         if (ctx->length_size == 3)
                ^
80.             return AVERROR(EINVAL);
81. 

libavcodec/h264_mp4toannexb_bsf.c:83:9: 
81. 
82.         /* retrieve sps and pps unit(s) */
83.         unit_nb = *extradata++ & 0x1f; /* number of sps unit(s) */
            ^
84.         if (!unit_nb) {
85.             unit_nb = *extradata++; /* number of pps unit(s) */

libavcodec/h264_mp4toannexb_bsf.c:84:14: Taking false branch
82.         /* retrieve sps and pps unit(s) */
83.         unit_nb = *extradata++ & 0x1f; /* number of sps unit(s) */
84.         if (!unit_nb) {
                 ^
85.             unit_nb = *extradata++; /* number of pps unit(s) */
86.             sps_done++;

libavcodec/h264_mp4toannexb_bsf.c:88:16: Loop condition is true. Entering loop body
86.             sps_done++;
87.         }
88.         while (unit_nb--) {
                   ^
89.             unit_size = AV_RB16(extradata);
90.             total_size += unit_size+4;

libavcodec/h264_mp4toannexb_bsf.c:89:13: 
87.         }
88.         while (unit_nb--) {
89.             unit_size = AV_RB16(extradata);
                ^
90.             total_size += unit_size+4;
91.             if (extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {

libavutil/bswap.h:52:1: start of procedure bswap_16()
  50. 
  51. #ifndef bswap_16
  52. static av_always_inline av_const uint16_t bswap_16(uint16_t x)
      ^
  53. {
  54.     x= (x>>8) | (x<<8);

libavutil/bswap.h:54:5: 
  52. static av_always_inline av_const uint16_t bswap_16(uint16_t x)
  53. {
  54.     x= (x>>8) | (x<<8);
          ^
  55.     return x;
  56. }

libavutil/bswap.h:55:5: 
  53. {
  54.     x= (x>>8) | (x<<8);
  55.     return x;
          ^
  56. }
  57. #endif

libavutil/bswap.h:56:1: return from a call to bswap_16
  54.     x= (x>>8) | (x<<8);
  55.     return x;
  56. }
      ^
  57. #endif
  58. 

libavcodec/h264_mp4toannexb_bsf.c:90:13: 
88.         while (unit_nb--) {
89.             unit_size = AV_RB16(extradata);
90.             total_size += unit_size+4;
                ^
91.             if (extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {
92.                 av_free(out);

libavcodec/h264_mp4toannexb_bsf.c:91:17: Taking false branch
89.             unit_size = AV_RB16(extradata);
90.             total_size += unit_size+4;
91.             if (extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {
                    ^
92.                 av_free(out);
93.                 return AVERROR(EINVAL);

libavcodec/h264_mp4toannexb_bsf.c:95:13: 
93.                 return AVERROR(EINVAL);
94.             }
95.             out = av_realloc(out, total_size);
                ^
96.             if (!out)
97.                 return AVERROR(ENOMEM);

libavutil/mem.c:119:1: start of procedure av_realloc()
  117. }
  118. 
  119. void *av_realloc(void *ptr, unsigned int size)
       ^
  120. {
  121. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:126:8: Taking false branch
  124. 
  125.     /* let's disallow possible ambiguous cases */
  126.     if(size > (INT_MAX-16) )
              ^
  127.         return NULL;
  128. 

libavutil/mem.c:135:5: 
  133.     return (char*)realloc((char*)ptr - diff, size + diff) + diff;
  134. #else
  135.     return realloc(ptr, size);
           ^
  136. #endif
  137. }

libavutil/mem.c:137:1: return from a call to av_realloc
  135.     return realloc(ptr, size);
  136. #endif
  137. }
       ^
  138. 
  139. void av_free(void *ptr)

libavcodec/h264_mp4toannexb_bsf.c:96:18: Taking false branch
94.             }
95.             out = av_realloc(out, total_size);
96.             if (!out)
                     ^
97.                 return AVERROR(ENOMEM);
98.             memcpy(out+total_size-unit_size-4, nalu_header, 4);

libavcodec/h264_mp4toannexb_bsf.c:98:13: 
 96.             if (!out)
 97.                 return AVERROR(ENOMEM);
 98.             memcpy(out+total_size-unit_size-4, nalu_header, 4);
                 ^
 99.             memcpy(out+total_size-unit_size,   extradata+2, unit_size);
100.             extradata += 2+unit_size;

libavcodec/h264_mp4toannexb_bsf.c:99:13: 
 97.                 return AVERROR(ENOMEM);
 98.             memcpy(out+total_size-unit_size-4, nalu_header, 4);
 99.             memcpy(out+total_size-unit_size,   extradata+2, unit_size);
                 ^
100.             extradata += 2+unit_size;
101. 

libavcodec/h264_mp4toannexb_bsf.c:100:13: 
 98.             memcpy(out+total_size-unit_size-4, nalu_header, 4);
 99.             memcpy(out+total_size-unit_size,   extradata+2, unit_size);
100.             extradata += 2+unit_size;
                 ^
101. 
102.             if (!unit_nb && !sps_done++)

libavcodec/h264_mp4toannexb_bsf.c:102:18: Taking true branch
100.             extradata += 2+unit_size;
101. 
102.             if (!unit_nb && !sps_done++)
                      ^
103.                 unit_nb = *extradata++; /* number of pps unit(s) */
104.         }

libavcodec/h264_mp4toannexb_bsf.c:102:30: Taking true branch
100.             extradata += 2+unit_size;
101. 
102.             if (!unit_nb && !sps_done++)
                                  ^
103.                 unit_nb = *extradata++; /* number of pps unit(s) */
104.         }

libavcodec/h264_mp4toannexb_bsf.c:103:17: 
101. 
102.             if (!unit_nb && !sps_done++)
103.                 unit_nb = *extradata++; /* number of pps unit(s) */
                     ^
104.         }
105. 

libavcodec/h264_mp4toannexb_bsf.c:88:16: Loop condition is true. Entering loop body
86.             sps_done++;
87.         }
88.         while (unit_nb--) {
                   ^
89.             unit_size = AV_RB16(extradata);
90.             total_size += unit_size+4;

libavcodec/h264_mp4toannexb_bsf.c:89:13: 
87.         }
88.         while (unit_nb--) {
89.             unit_size = AV_RB16(extradata);
                ^
90.             total_size += unit_size+4;
91.             if (extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {

libavutil/bswap.h:52:1: start of procedure bswap_16()
  50. 
  51. #ifndef bswap_16
  52. static av_always_inline av_const uint16_t bswap_16(uint16_t x)
      ^
  53. {
  54.     x= (x>>8) | (x<<8);

libavutil/bswap.h:54:5: 
  52. static av_always_inline av_const uint16_t bswap_16(uint16_t x)
  53. {
  54.     x= (x>>8) | (x<<8);
          ^
  55.     return x;
  56. }

libavutil/bswap.h:55:5: 
  53. {
  54.     x= (x>>8) | (x<<8);
  55.     return x;
          ^
  56. }
  57. #endif

libavutil/bswap.h:56:1: return from a call to bswap_16
  54.     x= (x>>8) | (x<<8);
  55.     return x;
  56. }
      ^
  57. #endif
  58. 

libavcodec/h264_mp4toannexb_bsf.c:90:13: 
88.         while (unit_nb--) {
89.             unit_size = AV_RB16(extradata);
90.             total_size += unit_size+4;
                ^
91.             if (extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {
92.                 av_free(out);

libavcodec/h264_mp4toannexb_bsf.c:91:17: Taking false branch
89.             unit_size = AV_RB16(extradata);
90.             total_size += unit_size+4;
91.             if (extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {
                    ^
92.                 av_free(out);
93.                 return AVERROR(EINVAL);

libavcodec/h264_mp4toannexb_bsf.c:95:13: 
93.                 return AVERROR(EINVAL);
94.             }
95.             out = av_realloc(out, total_size);
                ^
96.             if (!out)
97.                 return AVERROR(ENOMEM);

libavutil/mem.c:119:1: start of procedure av_realloc()
  117. }
  118. 
  119. void *av_realloc(void *ptr, unsigned int size)
       ^
  120. {
  121. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:126:8: Taking true branch
  124. 
  125.     /* let's disallow possible ambiguous cases */
  126.     if(size > (INT_MAX-16) )
              ^
  127.         return NULL;
  128. 

libavutil/mem.c:127:9: 
  125.     /* let's disallow possible ambiguous cases */
  126.     if(size > (INT_MAX-16) )
  127.         return NULL;
               ^
  128. 
  129. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:137:1: return from a call to av_realloc
  135.     return realloc(ptr, size);
  136. #endif
  137. }
       ^
  138. 
  139. void av_free(void *ptr)

static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
                                   AVCodecContext *avctx, const char *args,
                                   uint8_t  **poutbuf, int *poutbuf_size,
                                   const uint8_t *buf, int      buf_size,
                                   int keyframe) {
    H264BSFContext *ctx = bsfc->priv_data;
    uint8_t unit_type;
    int32_t nal_size;
    uint32_t cumul_size = 0;
    const uint8_t *buf_end = buf + buf_size;
    if (!avctx->extradata || avctx->extradata_size < 6) {
        *poutbuf = (uint8_t*) buf;
        *poutbuf_size = buf_size;
        return 0;
    }
    if (!ctx->sps_pps_data) {
        uint16_t unit_size;
        uint32_t total_size = 0;
        uint8_t *out = NULL, unit_nb, sps_done = 0;
        const uint8_t *extradata = avctx->extradata+4;
        static const uint8_t nalu_header[4] = {0, 0, 0, 1};
        ctx->length_size = (*extradata++ & 0x3) + 1;
        if (ctx->length_size == 3)
            return AVERROR(EINVAL);
        unit_nb = *extradata++ & 0x1f;
        if (!unit_nb) {
            unit_nb = *extradata++;
            sps_done++;
        }
        while (unit_nb--) {
            unit_size = AV_RB16(extradata);
            total_size += unit_size+4;
            if (extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {
                av_free(out);
                return AVERROR(EINVAL);
            }
            out = av_realloc(out, total_size);
            if (!out)
                return AVERROR(ENOMEM);
            memcpy(out+total_size-unit_size-4, nalu_header, 4);
            memcpy(out+total_size-unit_size,   extradata+2, unit_size);
            extradata += 2+unit_size;
            if (!unit_nb && !sps_done++)
                unit_nb = *extradata++;
        }
        ctx->sps_pps_data = out;
        ctx->size = total_size;
        ctx->first_idr = 1;
    }
    *poutbuf_size = 0;
    *poutbuf = NULL;
    do {
        if (buf + ctx->length_size > buf_end)
            goto fail;
        if (ctx->length_size == 1)
            nal_size = buf[0];
        else if (ctx->length_size == 2)
            nal_size = AV_RB16(buf);
        else
            nal_size = AV_RB32(buf);
        buf += ctx->length_size;
        unit_type = *buf & 0x1f;
        if (buf + nal_size > buf_end || nal_size < 0)
            goto fail;
        if (ctx->first_idr && unit_type == 5) {
            alloc_and_copy(poutbuf, poutbuf_size,
                           ctx->sps_pps_data, ctx->size,
                           buf, nal_size);
            ctx->first_idr = 0;
        }
        else {
            alloc_and_copy(poutbuf, poutbuf_size,
                           NULL, 0,
                           buf, nal_size);
            if (!ctx->first_idr && unit_type == 1)
                ctx->first_idr = 1;
        }
        buf += nal_size;
        cumul_size += nal_size + ctx->length_size;
    } while (cumul_size < buf_size);
    return 1;
fail:
    av_freep(poutbuf);
    *poutbuf_size = 0;
    return AVERROR(EINVAL);
}
['static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,\n                                   AVCodecContext *avctx, const char *args,\n                                   uint8_t  **poutbuf, int *poutbuf_size,\n                                   const uint8_t *buf, int      buf_size,\n                                   int keyframe) {\n    H264BSFContext *ctx = bsfc->priv_data;\n    uint8_t unit_type;\n    int32_t nal_size;\n    uint32_t cumul_size = 0;\n    const uint8_t *buf_end = buf + buf_size;\n    if (!avctx->extradata || avctx->extradata_size < 6) {\n        *poutbuf = (uint8_t*) buf;\n        *poutbuf_size = buf_size;\n        return 0;\n    }\n    if (!ctx->sps_pps_data) {\n        uint16_t unit_size;\n        uint32_t total_size = 0;\n        uint8_t *out = NULL, unit_nb, sps_done = 0;\n        const uint8_t *extradata = avctx->extradata+4;\n        static const uint8_t nalu_header[4] = {0, 0, 0, 1};\n        ctx->length_size = (*extradata++ & 0x3) + 1;\n        if (ctx->length_size == 3)\n            return AVERROR(EINVAL);\n        unit_nb = *extradata++ & 0x1f;\n        if (!unit_nb) {\n            unit_nb = *extradata++;\n            sps_done++;\n        }\n        while (unit_nb--) {\n            unit_size = AV_RB16(extradata);\n            total_size += unit_size+4;\n            if (extradata+2+unit_size > avctx->extradata+avctx->extradata_size) {\n                av_free(out);\n                return AVERROR(EINVAL);\n            }\n            out = av_realloc(out, total_size);\n            if (!out)\n                return AVERROR(ENOMEM);\n            memcpy(out+total_size-unit_size-4, nalu_header, 4);\n            memcpy(out+total_size-unit_size,   extradata+2, unit_size);\n            extradata += 2+unit_size;\n            if (!unit_nb && !sps_done++)\n                unit_nb = *extradata++;\n        }\n        ctx->sps_pps_data = out;\n        ctx->size = total_size;\n        ctx->first_idr = 1;\n    }\n    *poutbuf_size = 0;\n    *poutbuf = NULL;\n    do {\n        if (buf + ctx->length_size > buf_end)\n            goto fail;\n        if (ctx->length_size == 1)\n            nal_size = buf[0];\n        else if (ctx->length_size == 2)\n            nal_size = AV_RB16(buf);\n        else\n            nal_size = AV_RB32(buf);\n        buf += ctx->length_size;\n        unit_type = *buf & 0x1f;\n        if (buf + nal_size > buf_end || nal_size < 0)\n            goto fail;\n        if (ctx->first_idr && unit_type == 5) {\n            alloc_and_copy(poutbuf, poutbuf_size,\n                           ctx->sps_pps_data, ctx->size,\n                           buf, nal_size);\n            ctx->first_idr = 0;\n        }\n        else {\n            alloc_and_copy(poutbuf, poutbuf_size,\n                           NULL, 0,\n                           buf, nal_size);\n            if (!ctx->first_idr && unit_type == 1)\n                ctx->first_idr = 1;\n        }\n        buf += nal_size;\n        cumul_size += nal_size + ctx->length_size;\n    } while (cumul_size < buf_size);\n    return 1;\nfail:\n    av_freep(poutbuf);\n    *poutbuf_size = 0;\n    return AVERROR(EINVAL);\n}', 'static av_always_inline av_const uint16_t bswap_16(uint16_t x)\n{\n    x= (x>>8) | (x<<8);\n    return x;\n}', 'void *av_realloc(void *ptr, unsigned int size)\n{\n#if CONFIG_MEMALIGN_HACK\n    int diff;\n#endif\n    if(size > (INT_MAX-16) )\n        return NULL;\n#if 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}']