libavcodec/pcm.c:51: error: Null Dereference
  pointer `avctx->coded_frame` last assigned on line 50 could be null and is dereferenced at line 51, column 5.

libavcodec/pcm.c:34:1: start of procedure pcm_encode_init()
32. #define MAX_CHANNELS 64
33. 
34. static av_cold int pcm_encode_init(AVCodecContext *avctx)
    ^
35. {
36.     avctx->frame_size = 1;

libavcodec/pcm.c:36:5: 
34. static av_cold int pcm_encode_init(AVCodecContext *avctx)
35. {
36.     avctx->frame_size = 1;
        ^
37.     switch(avctx->codec->id) {
38.     case CODEC_ID_PCM_ALAW:

libavcodec/pcm.c:37:5: 
35. {
36.     avctx->frame_size = 1;
37.     switch(avctx->codec->id) {
        ^
38.     case CODEC_ID_PCM_ALAW:
39.         pcm_alaw_tableinit();

libavcodec/pcm.c:38:5: Switch condition is false. Skipping switch case
36.     avctx->frame_size = 1;
37.     switch(avctx->codec->id) {
38.     case CODEC_ID_PCM_ALAW:
        ^
39.         pcm_alaw_tableinit();
40.         break;

libavcodec/pcm.c:41:5: Switch condition is false. Skipping switch case
39.         pcm_alaw_tableinit();
40.         break;
41.     case CODEC_ID_PCM_MULAW:
        ^
42.         pcm_ulaw_tableinit();
43.         break;

libavcodec/pcm.c:48:5: 
46.     }
47. 
48.     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
        ^
49.     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
50.     avctx->coded_frame= avcodec_alloc_frame();

libavcodec/utils.c:1332:1: start of procedure av_get_bits_per_sample()
  1330. #endif
  1331. 
  1332. int av_get_bits_per_sample(enum CodecID codec_id){
        ^
  1333.     switch(codec_id){
  1334.     case CODEC_ID_ADPCM_SBPRO_2:

libavcodec/utils.c:1333:5: 
  1331. 
  1332. int av_get_bits_per_sample(enum CodecID codec_id){
  1333.     switch(codec_id){
            ^
  1334.     case CODEC_ID_ADPCM_SBPRO_2:
  1335.         return 2;

libavcodec/utils.c:1334:5: Switch condition is false. Skipping switch case
  1332. int av_get_bits_per_sample(enum CodecID codec_id){
  1333.     switch(codec_id){
  1334.     case CODEC_ID_ADPCM_SBPRO_2:
            ^
  1335.         return 2;
  1336.     case CODEC_ID_ADPCM_SBPRO_3:

libavcodec/utils.c:1336:5: Switch condition is false. Skipping switch case
  1334.     case CODEC_ID_ADPCM_SBPRO_2:
  1335.         return 2;
  1336.     case CODEC_ID_ADPCM_SBPRO_3:
            ^
  1337.         return 3;
  1338.     case CODEC_ID_ADPCM_SBPRO_4:

libavcodec/utils.c:1338:5: Switch condition is false. Skipping switch case
  1336.     case CODEC_ID_ADPCM_SBPRO_3:
  1337.         return 3;
  1338.     case CODEC_ID_ADPCM_SBPRO_4:
            ^
  1339.     case CODEC_ID_ADPCM_CT:
  1340.     case CODEC_ID_ADPCM_IMA_WAV:

libavcodec/utils.c:1339:5: Switch condition is false. Skipping switch case
  1337.         return 3;
  1338.     case CODEC_ID_ADPCM_SBPRO_4:
  1339.     case CODEC_ID_ADPCM_CT:
            ^
  1340.     case CODEC_ID_ADPCM_IMA_WAV:
  1341.     case CODEC_ID_ADPCM_IMA_QT:

libavcodec/utils.c:1340:5: Switch condition is false. Skipping switch case
  1338.     case CODEC_ID_ADPCM_SBPRO_4:
  1339.     case CODEC_ID_ADPCM_CT:
  1340.     case CODEC_ID_ADPCM_IMA_WAV:
            ^
  1341.     case CODEC_ID_ADPCM_IMA_QT:
  1342.     case CODEC_ID_ADPCM_SWF:

libavcodec/utils.c:1341:5: Switch condition is false. Skipping switch case
  1339.     case CODEC_ID_ADPCM_CT:
  1340.     case CODEC_ID_ADPCM_IMA_WAV:
  1341.     case CODEC_ID_ADPCM_IMA_QT:
            ^
  1342.     case CODEC_ID_ADPCM_SWF:
  1343.     case CODEC_ID_ADPCM_MS:

libavcodec/utils.c:1342:5: Switch condition is false. Skipping switch case
  1340.     case CODEC_ID_ADPCM_IMA_WAV:
  1341.     case CODEC_ID_ADPCM_IMA_QT:
  1342.     case CODEC_ID_ADPCM_SWF:
            ^
  1343.     case CODEC_ID_ADPCM_MS:
  1344.     case CODEC_ID_ADPCM_YAMAHA:

libavcodec/utils.c:1343:5: Switch condition is false. Skipping switch case
  1341.     case CODEC_ID_ADPCM_IMA_QT:
  1342.     case CODEC_ID_ADPCM_SWF:
  1343.     case CODEC_ID_ADPCM_MS:
            ^
  1344.     case CODEC_ID_ADPCM_YAMAHA:
  1345.     case CODEC_ID_ADPCM_G722:

libavcodec/utils.c:1344:5: Switch condition is false. Skipping switch case
  1342.     case CODEC_ID_ADPCM_SWF:
  1343.     case CODEC_ID_ADPCM_MS:
  1344.     case CODEC_ID_ADPCM_YAMAHA:
            ^
  1345.     case CODEC_ID_ADPCM_G722:
  1346.         return 4;

libavcodec/utils.c:1345:5: Switch condition is false. Skipping switch case
  1343.     case CODEC_ID_ADPCM_MS:
  1344.     case CODEC_ID_ADPCM_YAMAHA:
  1345.     case CODEC_ID_ADPCM_G722:
            ^
  1346.         return 4;
  1347.     case CODEC_ID_PCM_ALAW:

libavcodec/utils.c:1347:5: Switch condition is false. Skipping switch case
  1345.     case CODEC_ID_ADPCM_G722:
  1346.         return 4;
  1347.     case CODEC_ID_PCM_ALAW:
            ^
  1348.     case CODEC_ID_PCM_MULAW:
  1349.     case CODEC_ID_PCM_S8:

libavcodec/utils.c:1348:5: Switch condition is false. Skipping switch case
  1346.         return 4;
  1347.     case CODEC_ID_PCM_ALAW:
  1348.     case CODEC_ID_PCM_MULAW:
            ^
  1349.     case CODEC_ID_PCM_S8:
  1350.     case CODEC_ID_PCM_U8:

libavcodec/utils.c:1349:5: Switch condition is false. Skipping switch case
  1347.     case CODEC_ID_PCM_ALAW:
  1348.     case CODEC_ID_PCM_MULAW:
  1349.     case CODEC_ID_PCM_S8:
            ^
  1350.     case CODEC_ID_PCM_U8:
  1351.     case CODEC_ID_PCM_ZORK:

libavcodec/utils.c:1350:5: Switch condition is false. Skipping switch case
  1348.     case CODEC_ID_PCM_MULAW:
  1349.     case CODEC_ID_PCM_S8:
  1350.     case CODEC_ID_PCM_U8:
            ^
  1351.     case CODEC_ID_PCM_ZORK:
  1352.         return 8;

libavcodec/utils.c:1351:5: Switch condition is false. Skipping switch case
  1349.     case CODEC_ID_PCM_S8:
  1350.     case CODEC_ID_PCM_U8:
  1351.     case CODEC_ID_PCM_ZORK:
            ^
  1352.         return 8;
  1353.     case CODEC_ID_PCM_S16BE:

libavcodec/utils.c:1353:5: Switch condition is false. Skipping switch case
  1351.     case CODEC_ID_PCM_ZORK:
  1352.         return 8;
  1353.     case CODEC_ID_PCM_S16BE:
            ^
  1354.     case CODEC_ID_PCM_S16LE:
  1355.     case CODEC_ID_PCM_S16LE_PLANAR:

libavcodec/utils.c:1354:5: Switch condition is false. Skipping switch case
  1352.         return 8;
  1353.     case CODEC_ID_PCM_S16BE:
  1354.     case CODEC_ID_PCM_S16LE:
            ^
  1355.     case CODEC_ID_PCM_S16LE_PLANAR:
  1356.     case CODEC_ID_PCM_U16BE:

libavcodec/utils.c:1355:5: Switch condition is false. Skipping switch case
  1353.     case CODEC_ID_PCM_S16BE:
  1354.     case CODEC_ID_PCM_S16LE:
  1355.     case CODEC_ID_PCM_S16LE_PLANAR:
            ^
  1356.     case CODEC_ID_PCM_U16BE:
  1357.     case CODEC_ID_PCM_U16LE:

libavcodec/utils.c:1356:5: Switch condition is false. Skipping switch case
  1354.     case CODEC_ID_PCM_S16LE:
  1355.     case CODEC_ID_PCM_S16LE_PLANAR:
  1356.     case CODEC_ID_PCM_U16BE:
            ^
  1357.     case CODEC_ID_PCM_U16LE:
  1358.         return 16;

libavcodec/utils.c:1357:5: Switch condition is false. Skipping switch case
  1355.     case CODEC_ID_PCM_S16LE_PLANAR:
  1356.     case CODEC_ID_PCM_U16BE:
  1357.     case CODEC_ID_PCM_U16LE:
            ^
  1358.         return 16;
  1359.     case CODEC_ID_PCM_S24DAUD:

libavcodec/utils.c:1359:5: Switch condition is false. Skipping switch case
  1357.     case CODEC_ID_PCM_U16LE:
  1358.         return 16;
  1359.     case CODEC_ID_PCM_S24DAUD:
            ^
  1360.     case CODEC_ID_PCM_S24BE:
  1361.     case CODEC_ID_PCM_S24LE:

libavcodec/utils.c:1360:5: Switch condition is false. Skipping switch case
  1358.         return 16;
  1359.     case CODEC_ID_PCM_S24DAUD:
  1360.     case CODEC_ID_PCM_S24BE:
            ^
  1361.     case CODEC_ID_PCM_S24LE:
  1362.     case CODEC_ID_PCM_U24BE:

libavcodec/utils.c:1361:5: Switch condition is false. Skipping switch case
  1359.     case CODEC_ID_PCM_S24DAUD:
  1360.     case CODEC_ID_PCM_S24BE:
  1361.     case CODEC_ID_PCM_S24LE:
            ^
  1362.     case CODEC_ID_PCM_U24BE:
  1363.     case CODEC_ID_PCM_U24LE:

libavcodec/utils.c:1362:5: Switch condition is false. Skipping switch case
  1360.     case CODEC_ID_PCM_S24BE:
  1361.     case CODEC_ID_PCM_S24LE:
  1362.     case CODEC_ID_PCM_U24BE:
            ^
  1363.     case CODEC_ID_PCM_U24LE:
  1364.         return 24;

libavcodec/utils.c:1363:5: Switch condition is false. Skipping switch case
  1361.     case CODEC_ID_PCM_S24LE:
  1362.     case CODEC_ID_PCM_U24BE:
  1363.     case CODEC_ID_PCM_U24LE:
            ^
  1364.         return 24;
  1365.     case CODEC_ID_PCM_S32BE:

libavcodec/utils.c:1365:5: Switch condition is false. Skipping switch case
  1363.     case CODEC_ID_PCM_U24LE:
  1364.         return 24;
  1365.     case CODEC_ID_PCM_S32BE:
            ^
  1366.     case CODEC_ID_PCM_S32LE:
  1367.     case CODEC_ID_PCM_U32BE:

libavcodec/utils.c:1366:5: Switch condition is false. Skipping switch case
  1364.         return 24;
  1365.     case CODEC_ID_PCM_S32BE:
  1366.     case CODEC_ID_PCM_S32LE:
            ^
  1367.     case CODEC_ID_PCM_U32BE:
  1368.     case CODEC_ID_PCM_U32LE:

libavcodec/utils.c:1367:5: Switch condition is false. Skipping switch case
  1365.     case CODEC_ID_PCM_S32BE:
  1366.     case CODEC_ID_PCM_S32LE:
  1367.     case CODEC_ID_PCM_U32BE:
            ^
  1368.     case CODEC_ID_PCM_U32LE:
  1369.     case CODEC_ID_PCM_F32BE:

libavcodec/utils.c:1368:5: Switch condition is false. Skipping switch case
  1366.     case CODEC_ID_PCM_S32LE:
  1367.     case CODEC_ID_PCM_U32BE:
  1368.     case CODEC_ID_PCM_U32LE:
            ^
  1369.     case CODEC_ID_PCM_F32BE:
  1370.     case CODEC_ID_PCM_F32LE:

libavcodec/utils.c:1369:5: Switch condition is false. Skipping switch case
  1367.     case CODEC_ID_PCM_U32BE:
  1368.     case CODEC_ID_PCM_U32LE:
  1369.     case CODEC_ID_PCM_F32BE:
            ^
  1370.     case CODEC_ID_PCM_F32LE:
  1371.         return 32;

libavcodec/utils.c:1370:5: Switch condition is false. Skipping switch case
  1368.     case CODEC_ID_PCM_U32LE:
  1369.     case CODEC_ID_PCM_F32BE:
  1370.     case CODEC_ID_PCM_F32LE:
            ^
  1371.         return 32;
  1372.     case CODEC_ID_PCM_F64BE:

libavcodec/utils.c:1372:5: Switch condition is false. Skipping switch case
  1370.     case CODEC_ID_PCM_F32LE:
  1371.         return 32;
  1372.     case CODEC_ID_PCM_F64BE:
            ^
  1373.     case CODEC_ID_PCM_F64LE:
  1374.         return 64;

libavcodec/utils.c:1373:5: Switch condition is false. Skipping switch case
  1371.         return 32;
  1372.     case CODEC_ID_PCM_F64BE:
  1373.     case CODEC_ID_PCM_F64LE:
            ^
  1374.         return 64;
  1375.     default:

libavcodec/utils.c:1376:9: 
  1374.         return 64;
  1375.     default:
  1376.         return 0;
                ^
  1377.     }
  1378. }

libavcodec/utils.c:1378:1: return from a call to av_get_bits_per_sample
  1376.         return 0;
  1377.     }
  1378. }
        ^
  1379. 
  1380. #if FF_API_OLD_SAMPLE_FMT

libavcodec/pcm.c:49:5: 
47. 
48.     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
49.     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
        ^
50.     avctx->coded_frame= avcodec_alloc_frame();
51.     avctx->coded_frame->key_frame= 1;

libavcodec/pcm.c:50:5: 
48.     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
49.     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
50.     avctx->coded_frame= avcodec_alloc_frame();
        ^
51.     avctx->coded_frame->key_frame= 1;
52. 

libavcodec/utils.c:597:1: start of procedure avcodec_alloc_frame()
  595. }
  596. 
  597. AVFrame *avcodec_alloc_frame(void){
       ^
  598.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  599. 

libavcodec/utils.c:598:5: 
  596. 
  597. AVFrame *avcodec_alloc_frame(void){
  598.     AVFrame *pic= av_malloc(sizeof(AVFrame));
           ^
  599. 
  600.     if(pic==NULL) return NULL;

libavutil/mem.c:64:1: start of procedure av_malloc()
    62.    linker will do it automatically. */
    63. 
    64. void *av_malloc(size_t size)
        ^
    65. {
    66.     void *ptr = NULL;

libavutil/mem.c:66:5: 
    64. void *av_malloc(size_t size)
    65. {
    66.     void *ptr = NULL;
            ^
    67. #if CONFIG_MEMALIGN_HACK
    68.     long diff;

libavutil/mem.c:72:8: Taking false branch
    70. 
    71.     /* let's disallow possible ambiguous cases */
    72.     if(size > (INT_MAX-32) )
               ^
    73.         return NULL;
    74. 

libavutil/mem.c:83:9: Taking false branch
    81.     ((char*)ptr)[-1]= diff;
    82. #elif HAVE_POSIX_MEMALIGN
    83.     if (posix_memalign(&ptr,32,size))
                ^
    84.         ptr = NULL;
    85. #elif HAVE_MEMALIGN

libavutil/mem.c:114:5: 
    112.     ptr = malloc(size);
    113. #endif
    114.     return ptr;
             ^
    115. }
    116. 

libavutil/mem.c:115:1: return from a call to av_malloc
    113. #endif
    114.     return ptr;
    115. }
         ^
    116. 
    117. void *av_realloc(void *ptr, size_t size)

libavcodec/utils.c:600:8: Taking true branch
  598.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  599. 
  600.     if(pic==NULL) return NULL;
              ^
  601. 
  602.     avcodec_get_frame_defaults(pic);

libavcodec/utils.c:600:19: 
  598.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  599. 
  600.     if(pic==NULL) return NULL;
                         ^
  601. 
  602.     avcodec_get_frame_defaults(pic);

libavcodec/utils.c:605:1: return from a call to avcodec_alloc_frame
  603. 
  604.     return pic;
  605. }
       ^
  606. 
  607. #if FF_API_AVCODEC_OPEN

libavcodec/pcm.c:51:5: 
49.     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
50.     avctx->coded_frame= avcodec_alloc_frame();
51.     avctx->coded_frame->key_frame= 1;
        ^
52. 
53.     return 0;

static av_cold int pcm_encode_init(AVCodecContext *avctx)
{
    avctx->frame_size = 1;
    switch(avctx->codec->id) {
    case CODEC_ID_PCM_ALAW:
        pcm_alaw_tableinit();
        break;
    case CODEC_ID_PCM_MULAW:
        pcm_ulaw_tableinit();
        break;
    default:
        break;
    }
    avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
    avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
    avctx->coded_frame= avcodec_alloc_frame();
    avctx->coded_frame->key_frame= 1;
    return 0;
}
['static av_cold int pcm_encode_init(AVCodecContext *avctx)\n{\n    avctx->frame_size = 1;\n    switch(avctx->codec->id) {\n    case CODEC_ID_PCM_ALAW:\n        pcm_alaw_tableinit();\n        break;\n    case CODEC_ID_PCM_MULAW:\n        pcm_ulaw_tableinit();\n        break;\n    default:\n        break;\n    }\n    avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);\n    avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;\n    avctx->coded_frame= avcodec_alloc_frame();\n    avctx->coded_frame->key_frame= 1;\n    return 0;\n}', 'int av_get_bits_per_sample(enum CodecID codec_id){\n    switch(codec_id){\n    case CODEC_ID_ADPCM_SBPRO_2:\n        return 2;\n    case CODEC_ID_ADPCM_SBPRO_3:\n        return 3;\n    case CODEC_ID_ADPCM_SBPRO_4:\n    case CODEC_ID_ADPCM_CT:\n    case CODEC_ID_ADPCM_IMA_WAV:\n    case CODEC_ID_ADPCM_IMA_QT:\n    case CODEC_ID_ADPCM_SWF:\n    case CODEC_ID_ADPCM_MS:\n    case CODEC_ID_ADPCM_YAMAHA:\n    case CODEC_ID_ADPCM_G722:\n        return 4;\n    case CODEC_ID_PCM_ALAW:\n    case CODEC_ID_PCM_MULAW:\n    case CODEC_ID_PCM_S8:\n    case CODEC_ID_PCM_U8:\n    case CODEC_ID_PCM_ZORK:\n        return 8;\n    case CODEC_ID_PCM_S16BE:\n    case CODEC_ID_PCM_S16LE:\n    case CODEC_ID_PCM_S16LE_PLANAR:\n    case CODEC_ID_PCM_U16BE:\n    case CODEC_ID_PCM_U16LE:\n        return 16;\n    case CODEC_ID_PCM_S24DAUD:\n    case CODEC_ID_PCM_S24BE:\n    case CODEC_ID_PCM_S24LE:\n    case CODEC_ID_PCM_U24BE:\n    case CODEC_ID_PCM_U24LE:\n        return 24;\n    case CODEC_ID_PCM_S32BE:\n    case CODEC_ID_PCM_S32LE:\n    case CODEC_ID_PCM_U32BE:\n    case CODEC_ID_PCM_U32LE:\n    case CODEC_ID_PCM_F32BE:\n    case CODEC_ID_PCM_F32LE:\n        return 32;\n    case CODEC_ID_PCM_F64BE:\n    case CODEC_ID_PCM_F64LE:\n        return 64;\n    default:\n        return 0;\n    }\n}', 'AVFrame *avcodec_alloc_frame(void){\n    AVFrame *pic= av_malloc(sizeof(AVFrame));\n    if(pic==NULL) return NULL;\n    avcodec_get_frame_defaults(pic);\n    return pic;\n}', 'void *av_malloc(size_t size)\n{\n    void *ptr = NULL;\n#if CONFIG_MEMALIGN_HACK\n    long diff;\n#endif\n    if(size > (INT_MAX-32) )\n        return NULL;\n#if CONFIG_MEMALIGN_HACK\n    ptr = malloc(size+32);\n    if(!ptr)\n        return ptr;\n    diff= ((-(long)ptr - 1)&31) + 1;\n    ptr = (char*)ptr + diff;\n    ((char*)ptr)[-1]= diff;\n#elif HAVE_POSIX_MEMALIGN\n    if (posix_memalign(&ptr,32,size))\n        ptr = NULL;\n#elif HAVE_MEMALIGN\n    ptr = memalign(32,size);\n#else\n    ptr = malloc(size);\n#endif\n    return ptr;\n}']