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      1 /*
      2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 
     12 /* This is a simple program that reads ivf files and decodes them
     13  * using the new interface. Decoded frames are output as YV12 raw.
     14  */
     15 #include <stdio.h>
     16 #include <stdlib.h>
     17 #include <stdarg.h>
     18 #include <string.h>
     19 #include <limits.h>
     20 #if defined(_WIN32)
     21 #include <io.h>
     22 #define snprintf _snprintf
     23 #define isatty   _isatty
     24 #define fileno   _fileno
     25 #else
     26 #include <unistd.h>
     27 #endif
     28 #define VPX_CODEC_DISABLE_COMPAT 1
     29 #include "vpx_config.h"
     30 #include "vpx/vpx_decoder.h"
     31 #include "vpx_ports/vpx_timer.h"
     32 #if CONFIG_VP8_DECODER
     33 #include "vpx/vp8dx.h"
     34 #endif
     35 #if CONFIG_MD5
     36 #include "md5_utils.h"
     37 #endif
     38 #include "tools_common.h"
     39 #include "nestegg/include/nestegg/nestegg.h"
     40 
     41 #ifndef PATH_MAX
     42 #define PATH_MAX 256
     43 #endif
     44 
     45 static const char *exec_name;
     46 
     47 #define VP8_FOURCC (0x00385056)
     48 static const struct
     49 {
     50     char const *name;
     51     const vpx_codec_iface_t *iface;
     52     unsigned int             fourcc;
     53     unsigned int             fourcc_mask;
     54 } ifaces[] =
     55 {
     56 #if CONFIG_VP8_DECODER
     57     {"vp8",  &vpx_codec_vp8_dx_algo,   VP8_FOURCC, 0x00FFFFFF},
     58 #endif
     59 };
     60 
     61 #include "args.h"
     62 static const arg_def_t codecarg = ARG_DEF(NULL, "codec", 1,
     63                                   "Codec to use");
     64 static const arg_def_t use_yv12 = ARG_DEF(NULL, "yv12", 0,
     65                                   "Output raw YV12 frames");
     66 static const arg_def_t use_i420 = ARG_DEF(NULL, "i420", 0,
     67                                   "Output raw I420 frames");
     68 static const arg_def_t flipuvarg = ARG_DEF(NULL, "flipuv", 0,
     69                                    "Flip the chroma planes in the output");
     70 static const arg_def_t noblitarg = ARG_DEF(NULL, "noblit", 0,
     71                                    "Don't process the decoded frames");
     72 static const arg_def_t progressarg = ARG_DEF(NULL, "progress", 0,
     73                                      "Show progress after each frame decodes");
     74 static const arg_def_t limitarg = ARG_DEF(NULL, "limit", 1,
     75                                   "Stop decoding after n frames");
     76 static const arg_def_t postprocarg = ARG_DEF(NULL, "postproc", 0,
     77                                      "Postprocess decoded frames");
     78 static const arg_def_t summaryarg = ARG_DEF(NULL, "summary", 0,
     79                                     "Show timing summary");
     80 static const arg_def_t outputfile = ARG_DEF("o", "output", 1,
     81                                     "Output file name pattern (see below)");
     82 static const arg_def_t threadsarg = ARG_DEF("t", "threads", 1,
     83                                     "Max threads to use");
     84 static const arg_def_t verbosearg = ARG_DEF("v", "verbose", 0,
     85                                   "Show version string");
     86 
     87 #if CONFIG_MD5
     88 static const arg_def_t md5arg = ARG_DEF(NULL, "md5", 0,
     89                                         "Compute the MD5 sum of the decoded frame");
     90 #endif
     91 static const arg_def_t *all_args[] =
     92 {
     93     &codecarg, &use_yv12, &use_i420, &flipuvarg, &noblitarg,
     94     &progressarg, &limitarg, &postprocarg, &summaryarg, &outputfile,
     95     &threadsarg, &verbosearg,
     96 #if CONFIG_MD5
     97     &md5arg,
     98 #endif
     99     NULL
    100 };
    101 
    102 #if CONFIG_VP8_DECODER
    103 static const arg_def_t addnoise_level = ARG_DEF(NULL, "noise-level", 1,
    104                                         "Enable VP8 postproc add noise");
    105 static const arg_def_t deblock = ARG_DEF(NULL, "deblock", 0,
    106                                  "Enable VP8 deblocking");
    107 static const arg_def_t demacroblock_level = ARG_DEF(NULL, "demacroblock-level", 1,
    108         "Enable VP8 demacroblocking, w/ level");
    109 static const arg_def_t pp_debug_info = ARG_DEF(NULL, "pp-debug-info", 1,
    110                                        "Enable VP8 visible debug info");
    111 
    112 
    113 static const arg_def_t *vp8_pp_args[] =
    114 {
    115     &addnoise_level, &deblock, &demacroblock_level, &pp_debug_info,
    116     NULL
    117 };
    118 #endif
    119 
    120 static void usage_exit()
    121 {
    122     int i;
    123 
    124     fprintf(stderr, "Usage: %s <options> filename\n\n"
    125             "Options:\n", exec_name);
    126     arg_show_usage(stderr, all_args);
    127 #if CONFIG_VP8_DECODER
    128     fprintf(stderr, "\nVP8 Postprocessing Options:\n");
    129     arg_show_usage(stderr, vp8_pp_args);
    130 #endif
    131     fprintf(stderr,
    132             "\nOutput File Patterns:\n\n"
    133             "  The -o argument specifies the name of the file(s) to "
    134             "write to. If the\n  argument does not include any escape "
    135             "characters, the output will be\n  written to a single file. "
    136             "Otherwise, the filename will be calculated by\n  expanding "
    137             "the following escape characters:\n"
    138             "\n\t%%w   - Frame width"
    139             "\n\t%%h   - Frame height"
    140             "\n\t%%<n> - Frame number, zero padded to <n> places (1..9)"
    141             "\n\n  Pattern arguments are only supported in conjunction "
    142             "with the --yv12 and\n  --i420 options. If the -o option is "
    143             "not specified, the output will be\n  directed to stdout.\n"
    144             );
    145     fprintf(stderr, "\nIncluded decoders:\n\n");
    146 
    147     for (i = 0; i < sizeof(ifaces) / sizeof(ifaces[0]); i++)
    148         fprintf(stderr, "    %-6s - %s\n",
    149                 ifaces[i].name,
    150                 vpx_codec_iface_name(ifaces[i].iface));
    151 
    152     exit(EXIT_FAILURE);
    153 }
    154 
    155 void die(const char *fmt, ...)
    156 {
    157     va_list ap;
    158     va_start(ap, fmt);
    159     vfprintf(stderr, fmt, ap);
    160     fprintf(stderr, "\n");
    161     usage_exit();
    162 }
    163 
    164 static unsigned int mem_get_le16(const void *vmem)
    165 {
    166     unsigned int  val;
    167     const unsigned char *mem = (const unsigned char *)vmem;
    168 
    169     val = mem[1] << 8;
    170     val |= mem[0];
    171     return val;
    172 }
    173 
    174 static unsigned int mem_get_le32(const void *vmem)
    175 {
    176     unsigned int  val;
    177     const unsigned char *mem = (const unsigned char *)vmem;
    178 
    179     val = mem[3] << 24;
    180     val |= mem[2] << 16;
    181     val |= mem[1] << 8;
    182     val |= mem[0];
    183     return val;
    184 }
    185 
    186 enum file_kind
    187 {
    188     RAW_FILE,
    189     IVF_FILE,
    190     WEBM_FILE
    191 };
    192 
    193 struct input_ctx
    194 {
    195     enum file_kind  kind;
    196     FILE           *infile;
    197     nestegg        *nestegg_ctx;
    198     nestegg_packet *pkt;
    199     unsigned int    chunk;
    200     unsigned int    chunks;
    201     unsigned int    video_track;
    202 };
    203 
    204 #define IVF_FRAME_HDR_SZ (sizeof(uint32_t) + sizeof(uint64_t))
    205 #define RAW_FRAME_HDR_SZ (sizeof(uint32_t))
    206 static int read_frame(struct input_ctx      *input,
    207                       uint8_t               **buf,
    208                       size_t                *buf_sz,
    209                       size_t                *buf_alloc_sz)
    210 {
    211     char            raw_hdr[IVF_FRAME_HDR_SZ];
    212     size_t          new_buf_sz;
    213     FILE           *infile = input->infile;
    214     enum file_kind  kind = input->kind;
    215     if(kind == WEBM_FILE)
    216     {
    217         if(input->chunk >= input->chunks)
    218         {
    219             unsigned int track;
    220 
    221             do
    222             {
    223                 /* End of this packet, get another. */
    224                 if(input->pkt)
    225                     nestegg_free_packet(input->pkt);
    226 
    227                 if(nestegg_read_packet(input->nestegg_ctx, &input->pkt) <= 0
    228                    || nestegg_packet_track(input->pkt, &track))
    229                     return 1;
    230 
    231             } while(track != input->video_track);
    232 
    233             if(nestegg_packet_count(input->pkt, &input->chunks))
    234                 return 1;
    235             input->chunk = 0;
    236         }
    237 
    238         if(nestegg_packet_data(input->pkt, input->chunk, buf, buf_sz))
    239             return 1;
    240         input->chunk++;
    241 
    242         return 0;
    243     }
    244     /* For both the raw and ivf formats, the frame size is the first 4 bytes
    245      * of the frame header. We just need to special case on the header
    246      * size.
    247      */
    248     else if (fread(raw_hdr, kind==IVF_FILE
    249                    ? IVF_FRAME_HDR_SZ : RAW_FRAME_HDR_SZ, 1, infile) != 1)
    250     {
    251         if (!feof(infile))
    252             fprintf(stderr, "Failed to read frame size\n");
    253 
    254         new_buf_sz = 0;
    255     }
    256     else
    257     {
    258         new_buf_sz = mem_get_le32(raw_hdr);
    259 
    260         if (new_buf_sz > 256 * 1024 * 1024)
    261         {
    262             fprintf(stderr, "Error: Read invalid frame size (%u)\n",
    263                     (unsigned int)new_buf_sz);
    264             new_buf_sz = 0;
    265         }
    266 
    267         if (kind == RAW_FILE && new_buf_sz > 256 * 1024)
    268             fprintf(stderr, "Warning: Read invalid frame size (%u)"
    269                     " - not a raw file?\n", (unsigned int)new_buf_sz);
    270 
    271         if (new_buf_sz > *buf_alloc_sz)
    272         {
    273             uint8_t *new_buf = realloc(*buf, 2 * new_buf_sz);
    274 
    275             if (new_buf)
    276             {
    277                 *buf = new_buf;
    278                 *buf_alloc_sz = 2 * new_buf_sz;
    279             }
    280             else
    281             {
    282                 fprintf(stderr, "Failed to allocate compressed data buffer\n");
    283                 new_buf_sz = 0;
    284             }
    285         }
    286     }
    287 
    288     *buf_sz = new_buf_sz;
    289 
    290     if (*buf_sz)
    291     {
    292         if (fread(*buf, 1, *buf_sz, infile) != *buf_sz)
    293         {
    294             fprintf(stderr, "Failed to read full frame\n");
    295             return 1;
    296         }
    297 
    298         return 0;
    299     }
    300 
    301     return 1;
    302 }
    303 
    304 void *out_open(const char *out_fn, int do_md5)
    305 {
    306     void *out = NULL;
    307 
    308     if (do_md5)
    309     {
    310 #if CONFIG_MD5
    311         MD5Context *md5_ctx = out = malloc(sizeof(MD5Context));
    312         (void)out_fn;
    313         MD5Init(md5_ctx);
    314 #endif
    315     }
    316     else
    317     {
    318         FILE *outfile = out = strcmp("-", out_fn) ? fopen(out_fn, "wb")
    319                                                   : set_binary_mode(stdout);
    320 
    321         if (!outfile)
    322         {
    323             fprintf(stderr, "Failed to output file");
    324             exit(EXIT_FAILURE);
    325         }
    326     }
    327 
    328     return out;
    329 }
    330 
    331 void out_put(void *out, const uint8_t *buf, unsigned int len, int do_md5)
    332 {
    333     if (do_md5)
    334     {
    335 #if CONFIG_MD5
    336         MD5Update(out, buf, len);
    337 #endif
    338     }
    339     else
    340     {
    341         if(fwrite(buf, 1, len, out));
    342     }
    343 }
    344 
    345 void out_close(void *out, const char *out_fn, int do_md5)
    346 {
    347     if (do_md5)
    348     {
    349 #if CONFIG_MD5
    350         uint8_t md5[16];
    351         int i;
    352 
    353         MD5Final(md5, out);
    354         free(out);
    355 
    356         for (i = 0; i < 16; i++)
    357             printf("%02x", md5[i]);
    358 
    359         printf("  %s\n", out_fn);
    360 #endif
    361     }
    362     else
    363     {
    364         fclose(out);
    365     }
    366 }
    367 
    368 unsigned int file_is_ivf(FILE *infile,
    369                          unsigned int *fourcc,
    370                          unsigned int *width,
    371                          unsigned int *height,
    372                          unsigned int *fps_den,
    373                          unsigned int *fps_num)
    374 {
    375     char raw_hdr[32];
    376     int is_ivf = 0;
    377 
    378     if (fread(raw_hdr, 1, 32, infile) == 32)
    379     {
    380         if (raw_hdr[0] == 'D' && raw_hdr[1] == 'K'
    381             && raw_hdr[2] == 'I' && raw_hdr[3] == 'F')
    382         {
    383             is_ivf = 1;
    384 
    385             if (mem_get_le16(raw_hdr + 4) != 0)
    386                 fprintf(stderr, "Error: Unrecognized IVF version! This file may not"
    387                         " decode properly.");
    388 
    389             *fourcc = mem_get_le32(raw_hdr + 8);
    390             *width = mem_get_le16(raw_hdr + 12);
    391             *height = mem_get_le16(raw_hdr + 14);
    392             *fps_num = mem_get_le32(raw_hdr + 16);
    393             *fps_den = mem_get_le32(raw_hdr + 20);
    394 
    395             /* Some versions of vpxenc used 1/(2*fps) for the timebase, so
    396              * we can guess the framerate using only the timebase in this
    397              * case. Other files would require reading ahead to guess the
    398              * timebase, like we do for webm.
    399              */
    400             if(*fps_num < 1000)
    401             {
    402                 /* Correct for the factor of 2 applied to the timebase in the
    403                  * encoder.
    404                  */
    405                 if(*fps_num&1)*fps_den<<=1;
    406                 else *fps_num>>=1;
    407             }
    408             else
    409             {
    410                 /* Don't know FPS for sure, and don't have readahead code
    411                  * (yet?), so just default to 30fps.
    412                  */
    413                 *fps_num = 30;
    414                 *fps_den = 1;
    415             }
    416         }
    417     }
    418 
    419     if (!is_ivf)
    420         rewind(infile);
    421 
    422     return is_ivf;
    423 }
    424 
    425 
    426 unsigned int file_is_raw(FILE *infile,
    427                          unsigned int *fourcc,
    428                          unsigned int *width,
    429                          unsigned int *height,
    430                          unsigned int *fps_den,
    431                          unsigned int *fps_num)
    432 {
    433     unsigned char buf[32];
    434     int is_raw = 0;
    435     vpx_codec_stream_info_t si;
    436 
    437     if (fread(buf, 1, 32, infile) == 32)
    438     {
    439         int i;
    440 
    441         if(mem_get_le32(buf) < 256 * 1024 * 1024)
    442             for (i = 0; i < sizeof(ifaces) / sizeof(ifaces[0]); i++)
    443                 if(!vpx_codec_peek_stream_info(ifaces[i].iface,
    444                                                buf + 4, 32 - 4, &si))
    445                 {
    446                     is_raw = 1;
    447                     *fourcc = ifaces[i].fourcc;
    448                     *width = si.w;
    449                     *height = si.h;
    450                     *fps_num = 30;
    451                     *fps_den = 1;
    452                     break;
    453                 }
    454     }
    455 
    456     rewind(infile);
    457     return is_raw;
    458 }
    459 
    460 
    461 static int
    462 nestegg_read_cb(void *buffer, size_t length, void *userdata)
    463 {
    464     FILE *f = userdata;
    465 
    466     if(fread(buffer, 1, length, f) < length)
    467     {
    468         if (ferror(f))
    469             return -1;
    470         if (feof(f))
    471             return 0;
    472     }
    473     return 1;
    474 }
    475 
    476 
    477 static int
    478 nestegg_seek_cb(int64_t offset, int whence, void * userdata)
    479 {
    480     switch(whence) {
    481         case NESTEGG_SEEK_SET: whence = SEEK_SET; break;
    482         case NESTEGG_SEEK_CUR: whence = SEEK_CUR; break;
    483         case NESTEGG_SEEK_END: whence = SEEK_END; break;
    484     };
    485     return fseek(userdata, offset, whence)? -1 : 0;
    486 }
    487 
    488 
    489 static int64_t
    490 nestegg_tell_cb(void * userdata)
    491 {
    492     return ftell(userdata);
    493 }
    494 
    495 
    496 static void
    497 nestegg_log_cb(nestegg * context, unsigned int severity, char const * format,
    498                ...)
    499 {
    500     va_list ap;
    501 
    502     va_start(ap, format);
    503     vfprintf(stderr, format, ap);
    504     fprintf(stderr, "\n");
    505     va_end(ap);
    506 }
    507 
    508 
    509 static int
    510 webm_guess_framerate(struct input_ctx *input,
    511                      unsigned int     *fps_den,
    512                      unsigned int     *fps_num)
    513 {
    514     unsigned int i;
    515     uint64_t     tstamp=0;
    516 
    517     /* Guess the framerate. Read up to 1 second, or 50 video packets,
    518      * whichever comes first.
    519      */
    520     for(i=0; tstamp < 1000000000 && i < 50;)
    521     {
    522         nestegg_packet * pkt;
    523         unsigned int track;
    524 
    525         if(nestegg_read_packet(input->nestegg_ctx, &pkt) <= 0)
    526             break;
    527 
    528         nestegg_packet_track(pkt, &track);
    529         if(track == input->video_track)
    530         {
    531             nestegg_packet_tstamp(pkt, &tstamp);
    532             i++;
    533         }
    534 
    535         nestegg_free_packet(pkt);
    536     }
    537 
    538     if(nestegg_track_seek(input->nestegg_ctx, input->video_track, 0))
    539         goto fail;
    540 
    541     *fps_num = (i - 1) * 1000000;
    542     *fps_den = tstamp / 1000;
    543     return 0;
    544 fail:
    545     nestegg_destroy(input->nestegg_ctx);
    546     input->nestegg_ctx = NULL;
    547     rewind(input->infile);
    548     return 1;
    549 }
    550 
    551 
    552 static int
    553 file_is_webm(struct input_ctx *input,
    554              unsigned int     *fourcc,
    555              unsigned int     *width,
    556              unsigned int     *height,
    557              unsigned int     *fps_den,
    558              unsigned int     *fps_num)
    559 {
    560     unsigned int i, n;
    561     int          track_type = -1;
    562     uint64_t     tstamp=0;
    563 
    564     nestegg_io io = {nestegg_read_cb, nestegg_seek_cb, nestegg_tell_cb,
    565                      input->infile};
    566     nestegg_video_params params;
    567     nestegg_packet * pkt;
    568 
    569     if(nestegg_init(&input->nestegg_ctx, io, NULL))
    570         goto fail;
    571 
    572     if(nestegg_track_count(input->nestegg_ctx, &n))
    573         goto fail;
    574 
    575     for(i=0; i<n; i++)
    576     {
    577         track_type = nestegg_track_type(input->nestegg_ctx, i);
    578 
    579         if(track_type == NESTEGG_TRACK_VIDEO)
    580             break;
    581         else if(track_type < 0)
    582             goto fail;
    583     }
    584 
    585     if(nestegg_track_codec_id(input->nestegg_ctx, i) != NESTEGG_CODEC_VP8)
    586     {
    587         fprintf(stderr, "Not VP8 video, quitting.\n");
    588         exit(1);
    589     }
    590 
    591     input->video_track = i;
    592 
    593     if(nestegg_track_video_params(input->nestegg_ctx, i, &params))
    594         goto fail;
    595 
    596     *fps_den = 0;
    597     *fps_num = 0;
    598     *fourcc = VP8_FOURCC;
    599     *width = params.width;
    600     *height = params.height;
    601     return 1;
    602 fail:
    603     input->nestegg_ctx = NULL;
    604     rewind(input->infile);
    605     return 0;
    606 }
    607 
    608 
    609 void show_progress(int frame_in, int frame_out, unsigned long dx_time)
    610 {
    611     fprintf(stderr, "%d decoded frames/%d showed frames in %lu us (%.2f fps)\r",
    612             frame_in, frame_out, dx_time,
    613             (float)frame_out * 1000000.0 / (float)dx_time);
    614 }
    615 
    616 
    617 void generate_filename(const char *pattern, char *out, size_t q_len,
    618                        unsigned int d_w, unsigned int d_h,
    619                        unsigned int frame_in)
    620 {
    621     const char *p = pattern;
    622     char *q = out;
    623 
    624     do
    625     {
    626         char *next_pat = strchr(p, '%');
    627 
    628         if(p == next_pat)
    629         {
    630             size_t pat_len;
    631 
    632             // parse the pattern
    633             q[q_len - 1] = '\0';
    634             switch(p[1])
    635             {
    636             case 'w': snprintf(q, q_len - 1, "%d", d_w); break;
    637             case 'h': snprintf(q, q_len - 1, "%d", d_h); break;
    638             case '1': snprintf(q, q_len - 1, "%d", frame_in); break;
    639             case '2': snprintf(q, q_len - 1, "%02d", frame_in); break;
    640             case '3': snprintf(q, q_len - 1, "%03d", frame_in); break;
    641             case '4': snprintf(q, q_len - 1, "%04d", frame_in); break;
    642             case '5': snprintf(q, q_len - 1, "%05d", frame_in); break;
    643             case '6': snprintf(q, q_len - 1, "%06d", frame_in); break;
    644             case '7': snprintf(q, q_len - 1, "%07d", frame_in); break;
    645             case '8': snprintf(q, q_len - 1, "%08d", frame_in); break;
    646             case '9': snprintf(q, q_len - 1, "%09d", frame_in); break;
    647             default:
    648                 die("Unrecognized pattern %%%c\n", p[1]);
    649             }
    650 
    651             pat_len = strlen(q);
    652             if(pat_len >= q_len - 1)
    653                 die("Output filename too long.\n");
    654             q += pat_len;
    655             p += 2;
    656             q_len -= pat_len;
    657         }
    658         else
    659         {
    660             size_t copy_len;
    661 
    662             // copy the next segment
    663             if(!next_pat)
    664                 copy_len = strlen(p);
    665             else
    666                 copy_len = next_pat - p;
    667 
    668             if(copy_len >= q_len - 1)
    669                 die("Output filename too long.\n");
    670 
    671             memcpy(q, p, copy_len);
    672             q[copy_len] = '\0';
    673             q += copy_len;
    674             p += copy_len;
    675             q_len -= copy_len;
    676         }
    677     } while(*p);
    678 }
    679 
    680 
    681 int main(int argc, const char **argv_)
    682 {
    683     vpx_codec_ctx_t          decoder;
    684     char                  *fn = NULL;
    685     int                    i;
    686     uint8_t               *buf = NULL;
    687     size_t                 buf_sz = 0, buf_alloc_sz = 0;
    688     FILE                  *infile;
    689     int                    frame_in = 0, frame_out = 0, flipuv = 0, noblit = 0, do_md5 = 0, progress = 0;
    690     int                    stop_after = 0, postproc = 0, summary = 0, quiet = 1;
    691     vpx_codec_iface_t       *iface = NULL;
    692     unsigned int           fourcc;
    693     unsigned long          dx_time = 0;
    694     struct arg               arg;
    695     char                   **argv, **argi, **argj;
    696     const char             *outfile_pattern = 0;
    697     char                    outfile[PATH_MAX];
    698     int                     single_file;
    699     int                     use_y4m = 1;
    700     unsigned int            width;
    701     unsigned int            height;
    702     unsigned int            fps_den;
    703     unsigned int            fps_num;
    704     void                   *out = NULL;
    705     vpx_codec_dec_cfg_t     cfg = {0};
    706 #if CONFIG_VP8_DECODER
    707     vp8_postproc_cfg_t      vp8_pp_cfg = {0};
    708 #endif
    709     struct input_ctx        input = {0};
    710 
    711     /* Parse command line */
    712     exec_name = argv_[0];
    713     argv = argv_dup(argc - 1, argv_ + 1);
    714 
    715     for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step)
    716     {
    717         memset(&arg, 0, sizeof(arg));
    718         arg.argv_step = 1;
    719 
    720         if (arg_match(&arg, &codecarg, argi))
    721         {
    722             int j, k = -1;
    723 
    724             for (j = 0; j < sizeof(ifaces) / sizeof(ifaces[0]); j++)
    725                 if (!strcmp(ifaces[j].name, arg.val))
    726                     k = j;
    727 
    728             if (k >= 0)
    729                 iface = ifaces[k].iface;
    730             else
    731                 die("Error: Unrecognized argument (%s) to --codec\n",
    732                     arg.val);
    733         }
    734         else if (arg_match(&arg, &outputfile, argi))
    735             outfile_pattern = arg.val;
    736         else if (arg_match(&arg, &use_yv12, argi))
    737         {
    738             use_y4m = 0;
    739             flipuv = 1;
    740         }
    741         else if (arg_match(&arg, &use_i420, argi))
    742         {
    743             use_y4m = 0;
    744             flipuv = 0;
    745         }
    746         else if (arg_match(&arg, &flipuvarg, argi))
    747             flipuv = 1;
    748         else if (arg_match(&arg, &noblitarg, argi))
    749             noblit = 1;
    750         else if (arg_match(&arg, &progressarg, argi))
    751             progress = 1;
    752         else if (arg_match(&arg, &limitarg, argi))
    753             stop_after = arg_parse_uint(&arg);
    754         else if (arg_match(&arg, &postprocarg, argi))
    755             postproc = 1;
    756         else if (arg_match(&arg, &md5arg, argi))
    757             do_md5 = 1;
    758         else if (arg_match(&arg, &summaryarg, argi))
    759             summary = 1;
    760         else if (arg_match(&arg, &threadsarg, argi))
    761             cfg.threads = arg_parse_uint(&arg);
    762         else if (arg_match(&arg, &verbosearg, argi))
    763             quiet = 0;
    764 
    765 #if CONFIG_VP8_DECODER
    766         else if (arg_match(&arg, &addnoise_level, argi))
    767         {
    768             postproc = 1;
    769             vp8_pp_cfg.post_proc_flag |= VP8_ADDNOISE;
    770             vp8_pp_cfg.noise_level = arg_parse_uint(&arg);
    771         }
    772         else if (arg_match(&arg, &demacroblock_level, argi))
    773         {
    774             postproc = 1;
    775             vp8_pp_cfg.post_proc_flag |= VP8_DEMACROBLOCK;
    776             vp8_pp_cfg.deblocking_level = arg_parse_uint(&arg);
    777         }
    778         else if (arg_match(&arg, &deblock, argi))
    779         {
    780             postproc = 1;
    781             vp8_pp_cfg.post_proc_flag |= VP8_DEBLOCK;
    782         }
    783         else if (arg_match(&arg, &pp_debug_info, argi))
    784         {
    785             unsigned int level = arg_parse_uint(&arg);
    786 
    787             postproc = 1;
    788             vp8_pp_cfg.post_proc_flag &= ~0x7;
    789 
    790             if (level)
    791                 vp8_pp_cfg.post_proc_flag |= level;
    792         }
    793 
    794 #endif
    795         else
    796             argj++;
    797     }
    798 
    799     /* Check for unrecognized options */
    800     for (argi = argv; *argi; argi++)
    801         if (argi[0][0] == '-' && strlen(argi[0]) > 1)
    802             die("Error: Unrecognized option %s\n", *argi);
    803 
    804     /* Handle non-option arguments */
    805     fn = argv[0];
    806 
    807     if (!fn)
    808         usage_exit();
    809 
    810     /* Open file */
    811     infile = strcmp(fn, "-") ? fopen(fn, "rb") : set_binary_mode(stdin);
    812 
    813     if (!infile)
    814     {
    815         fprintf(stderr, "Failed to open file '%s'",
    816                 strcmp(fn, "-") ? fn : "stdin");
    817         return EXIT_FAILURE;
    818     }
    819 
    820     /* Make sure we don't dump to the terminal, unless forced to with -o - */
    821     if(!outfile_pattern && isatty(fileno(stdout)) && !do_md5 && !noblit)
    822     {
    823         fprintf(stderr,
    824                 "Not dumping raw video to your terminal. Use '-o -' to "
    825                 "override.\n");
    826         return EXIT_FAILURE;
    827     }
    828 
    829     input.infile = infile;
    830     if(file_is_ivf(infile, &fourcc, &width, &height, &fps_den,
    831                    &fps_num))
    832         input.kind = IVF_FILE;
    833     else if(file_is_webm(&input, &fourcc, &width, &height, &fps_den, &fps_num))
    834         input.kind = WEBM_FILE;
    835     else if(file_is_raw(infile, &fourcc, &width, &height, &fps_den, &fps_num))
    836         input.kind = RAW_FILE;
    837     else
    838     {
    839         fprintf(stderr, "Unrecognized input file type.\n");
    840         return EXIT_FAILURE;
    841     }
    842 
    843     /* If the output file is not set or doesn't have a sequence number in
    844      * it, then we only open it once.
    845      */
    846     outfile_pattern = outfile_pattern ? outfile_pattern : "-";
    847     single_file = 1;
    848     {
    849         const char *p = outfile_pattern;
    850         do
    851         {
    852             p = strchr(p, '%');
    853             if(p && p[1] >= '1' && p[1] <= '9')
    854             {
    855                 // pattern contains sequence number, so it's not unique.
    856                 single_file = 0;
    857                 break;
    858             }
    859             if(p)
    860                 p++;
    861         } while(p);
    862     }
    863 
    864     if(single_file && !noblit)
    865     {
    866         generate_filename(outfile_pattern, outfile, sizeof(outfile)-1,
    867                           width, height, 0);
    868         out = out_open(outfile, do_md5);
    869     }
    870 
    871     if (use_y4m && !noblit)
    872     {
    873         char buffer[128];
    874         if (!single_file)
    875         {
    876             fprintf(stderr, "YUV4MPEG2 not supported with output patterns,"
    877                             " try --i420 or --yv12.\n");
    878             return EXIT_FAILURE;
    879         }
    880 
    881         if(input.kind == WEBM_FILE)
    882             if(webm_guess_framerate(&input, &fps_den, &fps_num))
    883             {
    884                 fprintf(stderr, "Failed to guess framerate -- error parsing "
    885                                 "webm file?\n");
    886                 return EXIT_FAILURE;
    887             }
    888 
    889 
    890         /*Note: We can't output an aspect ratio here because IVF doesn't
    891            store one, and neither does VP8.
    892           That will have to wait until these tools support WebM natively.*/
    893         sprintf(buffer, "YUV4MPEG2 C%s W%u H%u F%u:%u I%c\n",
    894                 "420jpeg", width, height, fps_num, fps_den, 'p');
    895         out_put(out, (unsigned char *)buffer, strlen(buffer), do_md5);
    896     }
    897 
    898     /* Try to determine the codec from the fourcc. */
    899     for (i = 0; i < sizeof(ifaces) / sizeof(ifaces[0]); i++)
    900         if ((fourcc & ifaces[i].fourcc_mask) == ifaces[i].fourcc)
    901         {
    902             vpx_codec_iface_t  *ivf_iface = ifaces[i].iface;
    903 
    904             if (iface && iface != ivf_iface)
    905                 fprintf(stderr, "Notice -- IVF header indicates codec: %s\n",
    906                         ifaces[i].name);
    907             else
    908                 iface = ivf_iface;
    909 
    910             break;
    911         }
    912 
    913     if (vpx_codec_dec_init(&decoder, iface ? iface :  ifaces[0].iface, &cfg,
    914                            postproc ? VPX_CODEC_USE_POSTPROC : 0))
    915     {
    916         fprintf(stderr, "Failed to initialize decoder: %s\n", vpx_codec_error(&decoder));
    917         return EXIT_FAILURE;
    918     }
    919 
    920     if (!quiet)
    921         fprintf(stderr, "%s\n", decoder.name);
    922 
    923 #if CONFIG_VP8_DECODER
    924 
    925     if (vp8_pp_cfg.post_proc_flag
    926         && vpx_codec_control(&decoder, VP8_SET_POSTPROC, &vp8_pp_cfg))
    927     {
    928         fprintf(stderr, "Failed to configure postproc: %s\n", vpx_codec_error(&decoder));
    929         return EXIT_FAILURE;
    930     }
    931 
    932 #endif
    933 
    934     /* Decode file */
    935     while (!read_frame(&input, &buf, &buf_sz, &buf_alloc_sz))
    936     {
    937         vpx_codec_iter_t  iter = NULL;
    938         vpx_image_t    *img;
    939         struct vpx_usec_timer timer;
    940 
    941         vpx_usec_timer_start(&timer);
    942 
    943         if (vpx_codec_decode(&decoder, buf, buf_sz, NULL, 0))
    944         {
    945             const char *detail = vpx_codec_error_detail(&decoder);
    946             fprintf(stderr, "Failed to decode frame: %s\n", vpx_codec_error(&decoder));
    947 
    948             if (detail)
    949                 fprintf(stderr, "  Additional information: %s\n", detail);
    950 
    951             goto fail;
    952         }
    953 
    954         vpx_usec_timer_mark(&timer);
    955         dx_time += vpx_usec_timer_elapsed(&timer);
    956 
    957         ++frame_in;
    958 
    959         if ((img = vpx_codec_get_frame(&decoder, &iter)))
    960             ++frame_out;
    961 
    962         if (progress)
    963             show_progress(frame_in, frame_out, dx_time);
    964 
    965         if (!noblit)
    966         {
    967             if (img)
    968             {
    969                 unsigned int y;
    970                 char out_fn[PATH_MAX];
    971                 uint8_t *buf;
    972 
    973                 if (!single_file)
    974                 {
    975                     size_t len = sizeof(out_fn)-1;
    976 
    977                     out_fn[len] = '\0';
    978                     generate_filename(outfile_pattern, out_fn, len-1,
    979                                       img->d_w, img->d_h, frame_in);
    980                     out = out_open(out_fn, do_md5);
    981                 }
    982                 else if(use_y4m)
    983                     out_put(out, (unsigned char *)"FRAME\n", 6, do_md5);
    984 
    985                 buf = img->planes[VPX_PLANE_Y];
    986 
    987                 for (y = 0; y < img->d_h; y++)
    988                 {
    989                     out_put(out, buf, img->d_w, do_md5);
    990                     buf += img->stride[VPX_PLANE_Y];
    991                 }
    992 
    993                 buf = img->planes[flipuv?VPX_PLANE_V:VPX_PLANE_U];
    994 
    995                 for (y = 0; y < (1 + img->d_h) / 2; y++)
    996                 {
    997                     out_put(out, buf, (1 + img->d_w) / 2, do_md5);
    998                     buf += img->stride[VPX_PLANE_U];
    999                 }
   1000 
   1001                 buf = img->planes[flipuv?VPX_PLANE_U:VPX_PLANE_V];
   1002 
   1003                 for (y = 0; y < (1 + img->d_h) / 2; y++)
   1004                 {
   1005                     out_put(out, buf, (1 + img->d_w) / 2, do_md5);
   1006                     buf += img->stride[VPX_PLANE_V];
   1007                 }
   1008 
   1009                 if (!single_file)
   1010                     out_close(out, out_fn, do_md5);
   1011             }
   1012         }
   1013 
   1014         if (stop_after && frame_in >= stop_after)
   1015             break;
   1016     }
   1017 
   1018     if (summary || progress)
   1019     {
   1020         show_progress(frame_in, frame_out, dx_time);
   1021         fprintf(stderr, "\n");
   1022     }
   1023 
   1024 fail:
   1025 
   1026     if (vpx_codec_destroy(&decoder))
   1027     {
   1028         fprintf(stderr, "Failed to destroy decoder: %s\n", vpx_codec_error(&decoder));
   1029         return EXIT_FAILURE;
   1030     }
   1031 
   1032     if (single_file && !noblit)
   1033         out_close(out, outfile, do_md5);
   1034 
   1035     if(input.nestegg_ctx)
   1036         nestegg_destroy(input.nestegg_ctx);
   1037     if(input.kind != WEBM_FILE)
   1038         free(buf);
   1039     fclose(infile);
   1040     free(argv);
   1041 
   1042     return EXIT_SUCCESS;
   1043 }
   1044