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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 #include <assert.h>
     12 #include <stdio.h>
     13 #include <stdlib.h>
     14 #include <stdarg.h>
     15 #include <string.h>
     16 #include <limits.h>
     17 
     18 #include "third_party/libyuv/include/libyuv/scale.h"
     19 
     20 #include "./args.h"
     21 #include "./ivfdec.h"
     22 
     23 #define VPX_CODEC_DISABLE_COMPAT 1
     24 #include "./vpx_config.h"
     25 #include "vpx/vpx_decoder.h"
     26 #include "vpx_ports/mem_ops.h"
     27 #include "vpx_ports/vpx_timer.h"
     28 
     29 #if CONFIG_VP8_DECODER || CONFIG_VP9_DECODER
     30 #include "vpx/vp8dx.h"
     31 #endif
     32 
     33 #include "./md5_utils.h"
     34 
     35 #include "./tools_common.h"
     36 #include "./webmdec.h"
     37 #include "./y4menc.h"
     38 
     39 static const char *exec_name;
     40 
     41 struct VpxDecInputContext {
     42   struct VpxInputContext *vpx_input_ctx;
     43   struct WebmInputContext *webm_ctx;
     44 };
     45 
     46 static const arg_def_t looparg = ARG_DEF(NULL, "loops", 1,
     47                                           "Number of times to decode the file");
     48 static const arg_def_t codecarg = ARG_DEF(NULL, "codec", 1,
     49                                           "Codec to use");
     50 static const arg_def_t use_yv12 = ARG_DEF(NULL, "yv12", 0,
     51                                           "Output raw YV12 frames");
     52 static const arg_def_t use_i420 = ARG_DEF(NULL, "i420", 0,
     53                                           "Output raw I420 frames");
     54 static const arg_def_t flipuvarg = ARG_DEF(NULL, "flipuv", 0,
     55                                            "Flip the chroma planes in the output");
     56 static const arg_def_t noblitarg = ARG_DEF(NULL, "noblit", 0,
     57                                            "Don't process the decoded frames");
     58 static const arg_def_t progressarg = ARG_DEF(NULL, "progress", 0,
     59                                              "Show progress after each frame decodes");
     60 static const arg_def_t limitarg = ARG_DEF(NULL, "limit", 1,
     61                                           "Stop decoding after n frames");
     62 static const arg_def_t skiparg = ARG_DEF(NULL, "skip", 1,
     63                                          "Skip the first n input frames");
     64 static const arg_def_t postprocarg = ARG_DEF(NULL, "postproc", 0,
     65                                              "Postprocess decoded frames");
     66 static const arg_def_t summaryarg = ARG_DEF(NULL, "summary", 0,
     67                                             "Show timing summary");
     68 static const arg_def_t outputfile = ARG_DEF("o", "output", 1,
     69                                             "Output file name pattern (see below)");
     70 static const arg_def_t threadsarg = ARG_DEF("t", "threads", 1,
     71                                             "Max threads to use");
     72 static const arg_def_t verbosearg = ARG_DEF("v", "verbose", 0,
     73                                             "Show version string");
     74 static const arg_def_t error_concealment = ARG_DEF(NULL, "error-concealment", 0,
     75                                                    "Enable decoder error-concealment");
     76 static const arg_def_t scalearg = ARG_DEF("S", "scale", 0,
     77                                             "Scale output frames uniformly");
     78 
     79 static const arg_def_t fb_arg =
     80     ARG_DEF(NULL, "frame-buffers", 1, "Number of frame buffers to use");
     81 
     82 static const arg_def_t md5arg = ARG_DEF(NULL, "md5", 0,
     83                                         "Compute the MD5 sum of the decoded frame");
     84 
     85 static const arg_def_t *all_args[] = {
     86   &codecarg, &use_yv12, &use_i420, &flipuvarg, &noblitarg,
     87   &progressarg, &limitarg, &skiparg, &postprocarg, &summaryarg, &outputfile,
     88   &threadsarg, &verbosearg, &scalearg, &fb_arg,
     89   &md5arg,
     90   &error_concealment,
     91   NULL
     92 };
     93 
     94 #if CONFIG_VP8_DECODER
     95 static const arg_def_t addnoise_level = ARG_DEF(NULL, "noise-level", 1,
     96                                                 "Enable VP8 postproc add noise");
     97 static const arg_def_t deblock = ARG_DEF(NULL, "deblock", 0,
     98                                          "Enable VP8 deblocking");
     99 static const arg_def_t demacroblock_level = ARG_DEF(NULL, "demacroblock-level", 1,
    100                                                     "Enable VP8 demacroblocking, w/ level");
    101 static const arg_def_t pp_debug_info = ARG_DEF(NULL, "pp-debug-info", 1,
    102                                                "Enable VP8 visible debug info");
    103 static const arg_def_t pp_disp_ref_frame = ARG_DEF(NULL, "pp-dbg-ref-frame", 1,
    104                                                    "Display only selected reference frame per macro block");
    105 static const arg_def_t pp_disp_mb_modes = ARG_DEF(NULL, "pp-dbg-mb-modes", 1,
    106                                                   "Display only selected macro block modes");
    107 static const arg_def_t pp_disp_b_modes = ARG_DEF(NULL, "pp-dbg-b-modes", 1,
    108                                                  "Display only selected block modes");
    109 static const arg_def_t pp_disp_mvs = ARG_DEF(NULL, "pp-dbg-mvs", 1,
    110                                              "Draw only selected motion vectors");
    111 static const arg_def_t mfqe = ARG_DEF(NULL, "mfqe", 0,
    112                                       "Enable multiframe quality enhancement");
    113 
    114 static const arg_def_t *vp8_pp_args[] = {
    115   &addnoise_level, &deblock, &demacroblock_level, &pp_debug_info,
    116   &pp_disp_ref_frame, &pp_disp_mb_modes, &pp_disp_b_modes, &pp_disp_mvs, &mfqe,
    117   NULL
    118 };
    119 #endif
    120 
    121 static int vpx_image_scale(vpx_image_t *src, vpx_image_t *dst,
    122                            FilterMode mode) {
    123   assert(src->fmt == VPX_IMG_FMT_I420);
    124   assert(dst->fmt == VPX_IMG_FMT_I420);
    125   return I420Scale(src->planes[VPX_PLANE_Y], src->stride[VPX_PLANE_Y],
    126                    src->planes[VPX_PLANE_U], src->stride[VPX_PLANE_U],
    127                    src->planes[VPX_PLANE_V], src->stride[VPX_PLANE_V],
    128                    src->d_w, src->d_h,
    129                    dst->planes[VPX_PLANE_Y], dst->stride[VPX_PLANE_Y],
    130                    dst->planes[VPX_PLANE_U], dst->stride[VPX_PLANE_U],
    131                    dst->planes[VPX_PLANE_V], dst->stride[VPX_PLANE_V],
    132                    dst->d_w, dst->d_h,
    133                    mode);
    134 }
    135 
    136 void usage_exit() {
    137   int i;
    138 
    139   fprintf(stderr, "Usage: %s <options> filename\n\n"
    140           "Options:\n", exec_name);
    141   arg_show_usage(stderr, all_args);
    142 #if CONFIG_VP8_DECODER
    143   fprintf(stderr, "\nVP8 Postprocessing Options:\n");
    144   arg_show_usage(stderr, vp8_pp_args);
    145 #endif
    146   fprintf(stderr,
    147           "\nOutput File Patterns:\n\n"
    148           "  The -o argument specifies the name of the file(s) to "
    149           "write to. If the\n  argument does not include any escape "
    150           "characters, the output will be\n  written to a single file. "
    151           "Otherwise, the filename will be calculated by\n  expanding "
    152           "the following escape characters:\n");
    153   fprintf(stderr,
    154           "\n\t%%w   - Frame width"
    155           "\n\t%%h   - Frame height"
    156           "\n\t%%<n> - Frame number, zero padded to <n> places (1..9)"
    157           "\n\n  Pattern arguments are only supported in conjunction "
    158           "with the --yv12 and\n  --i420 options. If the -o option is "
    159           "not specified, the output will be\n  directed to stdout.\n"
    160          );
    161   fprintf(stderr, "\nIncluded decoders:\n\n");
    162 
    163   for (i = 0; i < get_vpx_decoder_count(); ++i) {
    164     const VpxInterface *const decoder = get_vpx_decoder_by_index(i);
    165     fprintf(stderr, "    %-6s - %s\n",
    166             decoder->name, vpx_codec_iface_name(decoder->interface()));
    167   }
    168 
    169   exit(EXIT_FAILURE);
    170 }
    171 
    172 static int raw_read_frame(FILE *infile, uint8_t **buffer,
    173                           size_t *bytes_read, size_t *buffer_size) {
    174   char raw_hdr[RAW_FRAME_HDR_SZ];
    175   size_t frame_size = 0;
    176 
    177   if (fread(raw_hdr, RAW_FRAME_HDR_SZ, 1, infile) != 1) {
    178     if (!feof(infile))
    179       warn("Failed to read RAW frame size\n");
    180   } else {
    181     const size_t kCorruptFrameThreshold = 256 * 1024 * 1024;
    182     const size_t kFrameTooSmallThreshold = 256 * 1024;
    183     frame_size = mem_get_le32(raw_hdr);
    184 
    185     if (frame_size > kCorruptFrameThreshold) {
    186       warn("Read invalid frame size (%u)\n", (unsigned int)frame_size);
    187       frame_size = 0;
    188     }
    189 
    190     if (frame_size < kFrameTooSmallThreshold) {
    191       warn("Warning: Read invalid frame size (%u) - not a raw file?\n",
    192            (unsigned int)frame_size);
    193     }
    194 
    195     if (frame_size > *buffer_size) {
    196       uint8_t *new_buf = realloc(*buffer, 2 * frame_size);
    197       if (new_buf) {
    198         *buffer = new_buf;
    199         *buffer_size = 2 * frame_size;
    200       } else {
    201         warn("Failed to allocate compressed data buffer\n");
    202         frame_size = 0;
    203       }
    204     }
    205   }
    206 
    207   if (!feof(infile)) {
    208     if (fread(*buffer, 1, frame_size, infile) != frame_size) {
    209       warn("Failed to read full frame\n");
    210       return 1;
    211     }
    212     *bytes_read = frame_size;
    213   }
    214 
    215   return 0;
    216 }
    217 
    218 static int read_frame(struct VpxDecInputContext *input, uint8_t **buf,
    219                       size_t *bytes_in_buffer, size_t *buffer_size) {
    220   switch (input->vpx_input_ctx->file_type) {
    221 #if CONFIG_WEBM_IO
    222     case FILE_TYPE_WEBM:
    223       return webm_read_frame(input->webm_ctx,
    224                              buf, bytes_in_buffer, buffer_size);
    225 #endif
    226     case FILE_TYPE_RAW:
    227       return raw_read_frame(input->vpx_input_ctx->file,
    228                             buf, bytes_in_buffer, buffer_size);
    229     case FILE_TYPE_IVF:
    230       return ivf_read_frame(input->vpx_input_ctx->file,
    231                             buf, bytes_in_buffer, buffer_size);
    232     default:
    233       return 1;
    234   }
    235 }
    236 
    237 static void update_image_md5(const vpx_image_t *img, const int planes[3],
    238                              MD5Context *md5) {
    239   int i, y;
    240 
    241   for (i = 0; i < 3; ++i) {
    242     const int plane = planes[i];
    243     const unsigned char *buf = img->planes[plane];
    244     const int stride = img->stride[plane];
    245     const int w = vpx_img_plane_width(img, plane);
    246     const int h = vpx_img_plane_height(img, plane);
    247 
    248     for (y = 0; y < h; ++y) {
    249       MD5Update(md5, buf, w);
    250       buf += stride;
    251     }
    252   }
    253 }
    254 
    255 static void write_image_file(const vpx_image_t *img, const int planes[3],
    256                              FILE *file) {
    257   int i, y;
    258 
    259   for (i = 0; i < 3; ++i) {
    260     const int plane = planes[i];
    261     const unsigned char *buf = img->planes[plane];
    262     const int stride = img->stride[plane];
    263     const int w = vpx_img_plane_width(img, plane);
    264     const int h = vpx_img_plane_height(img, plane);
    265 
    266     for (y = 0; y < h; ++y) {
    267       fwrite(buf, 1, w, file);
    268       buf += stride;
    269     }
    270   }
    271 }
    272 
    273 int file_is_raw(struct VpxInputContext *input) {
    274   uint8_t buf[32];
    275   int is_raw = 0;
    276   vpx_codec_stream_info_t si;
    277 
    278   si.sz = sizeof(si);
    279 
    280   if (fread(buf, 1, 32, input->file) == 32) {
    281     int i;
    282 
    283     if (mem_get_le32(buf) < 256 * 1024 * 1024) {
    284       for (i = 0; i < get_vpx_decoder_count(); ++i) {
    285         const VpxInterface *const decoder = get_vpx_decoder_by_index(i);
    286         if (!vpx_codec_peek_stream_info(decoder->interface(),
    287                                         buf + 4, 32 - 4, &si)) {
    288           is_raw = 1;
    289           input->fourcc = decoder->fourcc;
    290           input->width = si.w;
    291           input->height = si.h;
    292           input->framerate.numerator = 30;
    293           input->framerate.denominator = 1;
    294           break;
    295         }
    296       }
    297     }
    298   }
    299 
    300   rewind(input->file);
    301   return is_raw;
    302 }
    303 
    304 void show_progress(int frame_in, int frame_out, uint64_t dx_time) {
    305   fprintf(stderr,
    306           "%d decoded frames/%d showed frames in %"PRId64" us (%.2f fps)\r",
    307           frame_in, frame_out, dx_time,
    308           (double)frame_out * 1000000.0 / (double)dx_time);
    309 }
    310 
    311 struct ExternalFrameBuffer {
    312   uint8_t* data;
    313   size_t size;
    314   int in_use;
    315 };
    316 
    317 struct ExternalFrameBufferList {
    318   int num_external_frame_buffers;
    319   struct ExternalFrameBuffer *ext_fb;
    320 };
    321 
    322 // Callback used by libvpx to request an external frame buffer. |cb_priv|
    323 // Application private data passed into the set function. |min_size| is the
    324 // minimum size in bytes needed to decode the next frame. |fb| pointer to the
    325 // frame buffer.
    326 int get_vp9_frame_buffer(void *cb_priv, size_t min_size,
    327                          vpx_codec_frame_buffer_t *fb) {
    328   int i;
    329   struct ExternalFrameBufferList *const ext_fb_list =
    330       (struct ExternalFrameBufferList *)cb_priv;
    331   if (ext_fb_list == NULL)
    332     return -1;
    333 
    334   // Find a free frame buffer.
    335   for (i = 0; i < ext_fb_list->num_external_frame_buffers; ++i) {
    336     if (!ext_fb_list->ext_fb[i].in_use)
    337       break;
    338   }
    339 
    340   if (i == ext_fb_list->num_external_frame_buffers)
    341     return -1;
    342 
    343   if (ext_fb_list->ext_fb[i].size < min_size) {
    344     free(ext_fb_list->ext_fb[i].data);
    345     ext_fb_list->ext_fb[i].data = (uint8_t *)malloc(min_size);
    346     if (!ext_fb_list->ext_fb[i].data)
    347       return -1;
    348 
    349     ext_fb_list->ext_fb[i].size = min_size;
    350   }
    351 
    352   fb->data = ext_fb_list->ext_fb[i].data;
    353   fb->size = ext_fb_list->ext_fb[i].size;
    354   ext_fb_list->ext_fb[i].in_use = 1;
    355 
    356   // Set the frame buffer's private data to point at the external frame buffer.
    357   fb->priv = &ext_fb_list->ext_fb[i];
    358   return 0;
    359 }
    360 
    361 // Callback used by libvpx when there are no references to the frame buffer.
    362 // |cb_priv| user private data passed into the set function. |fb| pointer
    363 // to the frame buffer.
    364 int release_vp9_frame_buffer(void *cb_priv,
    365                              vpx_codec_frame_buffer_t *fb) {
    366   struct ExternalFrameBuffer *const ext_fb =
    367       (struct ExternalFrameBuffer *)fb->priv;
    368   (void)cb_priv;
    369   ext_fb->in_use = 0;
    370   return 0;
    371 }
    372 
    373 void generate_filename(const char *pattern, char *out, size_t q_len,
    374                        unsigned int d_w, unsigned int d_h,
    375                        unsigned int frame_in) {
    376   const char *p = pattern;
    377   char *q = out;
    378 
    379   do {
    380     char *next_pat = strchr(p, '%');
    381 
    382     if (p == next_pat) {
    383       size_t pat_len;
    384 
    385       /* parse the pattern */
    386       q[q_len - 1] = '\0';
    387       switch (p[1]) {
    388         case 'w':
    389           snprintf(q, q_len - 1, "%d", d_w);
    390           break;
    391         case 'h':
    392           snprintf(q, q_len - 1, "%d", d_h);
    393           break;
    394         case '1':
    395           snprintf(q, q_len - 1, "%d", frame_in);
    396           break;
    397         case '2':
    398           snprintf(q, q_len - 1, "%02d", frame_in);
    399           break;
    400         case '3':
    401           snprintf(q, q_len - 1, "%03d", frame_in);
    402           break;
    403         case '4':
    404           snprintf(q, q_len - 1, "%04d", frame_in);
    405           break;
    406         case '5':
    407           snprintf(q, q_len - 1, "%05d", frame_in);
    408           break;
    409         case '6':
    410           snprintf(q, q_len - 1, "%06d", frame_in);
    411           break;
    412         case '7':
    413           snprintf(q, q_len - 1, "%07d", frame_in);
    414           break;
    415         case '8':
    416           snprintf(q, q_len - 1, "%08d", frame_in);
    417           break;
    418         case '9':
    419           snprintf(q, q_len - 1, "%09d", frame_in);
    420           break;
    421         default:
    422           die("Unrecognized pattern %%%c\n", p[1]);
    423       }
    424 
    425       pat_len = strlen(q);
    426       if (pat_len >= q_len - 1)
    427         die("Output filename too long.\n");
    428       q += pat_len;
    429       p += 2;
    430       q_len -= pat_len;
    431     } else {
    432       size_t copy_len;
    433 
    434       /* copy the next segment */
    435       if (!next_pat)
    436         copy_len = strlen(p);
    437       else
    438         copy_len = next_pat - p;
    439 
    440       if (copy_len >= q_len - 1)
    441         die("Output filename too long.\n");
    442 
    443       memcpy(q, p, copy_len);
    444       q[copy_len] = '\0';
    445       q += copy_len;
    446       p += copy_len;
    447       q_len -= copy_len;
    448     }
    449   } while (*p);
    450 }
    451 
    452 static int is_single_file(const char *outfile_pattern) {
    453   const char *p = outfile_pattern;
    454 
    455   do {
    456     p = strchr(p, '%');
    457     if (p && p[1] >= '1' && p[1] <= '9')
    458       return 0;  // pattern contains sequence number, so it's not unique
    459     if (p)
    460       p++;
    461   } while (p);
    462 
    463   return 1;
    464 }
    465 
    466 static void print_md5(unsigned char digest[16], const char *filename) {
    467   int i;
    468 
    469   for (i = 0; i < 16; ++i)
    470     printf("%02x", digest[i]);
    471   printf("  %s\n", filename);
    472 }
    473 
    474 static FILE *open_outfile(const char *name) {
    475   if (strcmp("-", name) == 0) {
    476     set_binary_mode(stdout);
    477     return stdout;
    478   } else {
    479     FILE *file = fopen(name, "wb");
    480     if (!file)
    481       fatal("Failed to output file %s", name);
    482     return file;
    483   }
    484 }
    485 
    486 int main_loop(int argc, const char **argv_) {
    487   vpx_codec_ctx_t       decoder;
    488   char                  *fn = NULL;
    489   int                    i;
    490   uint8_t               *buf = NULL;
    491   size_t                 bytes_in_buffer = 0, buffer_size = 0;
    492   FILE                  *infile;
    493   int                    frame_in = 0, frame_out = 0, flipuv = 0, noblit = 0;
    494   int                    do_md5 = 0, progress = 0;
    495   int                    stop_after = 0, postproc = 0, summary = 0, quiet = 1;
    496   int                    arg_skip = 0;
    497   int                    ec_enabled = 0;
    498   const VpxInterface *interface = NULL;
    499   const VpxInterface *fourcc_interface = NULL;
    500   uint64_t dx_time = 0;
    501   struct arg               arg;
    502   char                   **argv, **argi, **argj;
    503 
    504   int                     single_file;
    505   int                     use_y4m = 1;
    506   vpx_codec_dec_cfg_t     cfg = {0};
    507 #if CONFIG_VP8_DECODER
    508   vp8_postproc_cfg_t      vp8_pp_cfg = {0};
    509   int                     vp8_dbg_color_ref_frame = 0;
    510   int                     vp8_dbg_color_mb_modes = 0;
    511   int                     vp8_dbg_color_b_modes = 0;
    512   int                     vp8_dbg_display_mv = 0;
    513 #endif
    514   int                     frames_corrupted = 0;
    515   int                     dec_flags = 0;
    516   int                     do_scale = 0;
    517   vpx_image_t             *scaled_img = NULL;
    518   int                     frame_avail, got_data;
    519   int                     num_external_frame_buffers = 0;
    520   struct ExternalFrameBufferList ext_fb_list = {0};
    521 
    522   const char *outfile_pattern = NULL;
    523   char outfile_name[PATH_MAX] = {0};
    524   FILE *outfile = NULL;
    525 
    526   MD5Context md5_ctx;
    527   unsigned char md5_digest[16];
    528 
    529   struct VpxDecInputContext input = {0};
    530   struct VpxInputContext vpx_input_ctx = {0};
    531   struct WebmInputContext webm_ctx = {0};
    532   input.vpx_input_ctx = &vpx_input_ctx;
    533   input.webm_ctx = &webm_ctx;
    534 
    535   /* Parse command line */
    536   exec_name = argv_[0];
    537   argv = argv_dup(argc - 1, argv_ + 1);
    538 
    539   for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) {
    540     memset(&arg, 0, sizeof(arg));
    541     arg.argv_step = 1;
    542 
    543     if (arg_match(&arg, &codecarg, argi)) {
    544       interface = get_vpx_decoder_by_name(arg.val);
    545       if (!interface)
    546         die("Error: Unrecognized argument (%s) to --codec\n", arg.val);
    547     } else if (arg_match(&arg, &looparg, argi)) {
    548       // no-op
    549     } else if (arg_match(&arg, &outputfile, argi))
    550       outfile_pattern = arg.val;
    551     else if (arg_match(&arg, &use_yv12, argi)) {
    552       use_y4m = 0;
    553       flipuv = 1;
    554     } else if (arg_match(&arg, &use_i420, argi)) {
    555       use_y4m = 0;
    556       flipuv = 0;
    557     } else if (arg_match(&arg, &flipuvarg, argi))
    558       flipuv = 1;
    559     else if (arg_match(&arg, &noblitarg, argi))
    560       noblit = 1;
    561     else if (arg_match(&arg, &progressarg, argi))
    562       progress = 1;
    563     else if (arg_match(&arg, &limitarg, argi))
    564       stop_after = arg_parse_uint(&arg);
    565     else if (arg_match(&arg, &skiparg, argi))
    566       arg_skip = arg_parse_uint(&arg);
    567     else if (arg_match(&arg, &postprocarg, argi))
    568       postproc = 1;
    569     else if (arg_match(&arg, &md5arg, argi))
    570       do_md5 = 1;
    571     else if (arg_match(&arg, &summaryarg, argi))
    572       summary = 1;
    573     else if (arg_match(&arg, &threadsarg, argi))
    574       cfg.threads = arg_parse_uint(&arg);
    575     else if (arg_match(&arg, &verbosearg, argi))
    576       quiet = 0;
    577     else if (arg_match(&arg, &scalearg, argi))
    578       do_scale = 1;
    579     else if (arg_match(&arg, &fb_arg, argi))
    580       num_external_frame_buffers = arg_parse_uint(&arg);
    581 
    582 #if CONFIG_VP8_DECODER
    583     else if (arg_match(&arg, &addnoise_level, argi)) {
    584       postproc = 1;
    585       vp8_pp_cfg.post_proc_flag |= VP8_ADDNOISE;
    586       vp8_pp_cfg.noise_level = arg_parse_uint(&arg);
    587     } else if (arg_match(&arg, &demacroblock_level, argi)) {
    588       postproc = 1;
    589       vp8_pp_cfg.post_proc_flag |= VP8_DEMACROBLOCK;
    590       vp8_pp_cfg.deblocking_level = arg_parse_uint(&arg);
    591     } else if (arg_match(&arg, &deblock, argi)) {
    592       postproc = 1;
    593       vp8_pp_cfg.post_proc_flag |= VP8_DEBLOCK;
    594     } else if (arg_match(&arg, &mfqe, argi)) {
    595       postproc = 1;
    596       vp8_pp_cfg.post_proc_flag |= VP8_MFQE;
    597     } else if (arg_match(&arg, &pp_debug_info, argi)) {
    598       unsigned int level = arg_parse_uint(&arg);
    599 
    600       postproc = 1;
    601       vp8_pp_cfg.post_proc_flag &= ~0x7;
    602 
    603       if (level)
    604         vp8_pp_cfg.post_proc_flag |= level;
    605     } else if (arg_match(&arg, &pp_disp_ref_frame, argi)) {
    606       unsigned int flags = arg_parse_int(&arg);
    607       if (flags) {
    608         postproc = 1;
    609         vp8_dbg_color_ref_frame = flags;
    610       }
    611     } else if (arg_match(&arg, &pp_disp_mb_modes, argi)) {
    612       unsigned int flags = arg_parse_int(&arg);
    613       if (flags) {
    614         postproc = 1;
    615         vp8_dbg_color_mb_modes = flags;
    616       }
    617     } else if (arg_match(&arg, &pp_disp_b_modes, argi)) {
    618       unsigned int flags = arg_parse_int(&arg);
    619       if (flags) {
    620         postproc = 1;
    621         vp8_dbg_color_b_modes = flags;
    622       }
    623     } else if (arg_match(&arg, &pp_disp_mvs, argi)) {
    624       unsigned int flags = arg_parse_int(&arg);
    625       if (flags) {
    626         postproc = 1;
    627         vp8_dbg_display_mv = flags;
    628       }
    629     } else if (arg_match(&arg, &error_concealment, argi)) {
    630       ec_enabled = 1;
    631     }
    632 
    633 #endif
    634     else
    635       argj++;
    636   }
    637 
    638   /* Check for unrecognized options */
    639   for (argi = argv; *argi; argi++)
    640     if (argi[0][0] == '-' && strlen(argi[0]) > 1)
    641       die("Error: Unrecognized option %s\n", *argi);
    642 
    643   /* Handle non-option arguments */
    644   fn = argv[0];
    645 
    646   if (!fn)
    647     usage_exit();
    648 
    649   /* Open file */
    650   infile = strcmp(fn, "-") ? fopen(fn, "rb") : set_binary_mode(stdin);
    651 
    652   if (!infile) {
    653     fprintf(stderr, "Failed to open file '%s'", strcmp(fn, "-") ? fn : "stdin");
    654     return EXIT_FAILURE;
    655   }
    656 #if CONFIG_OS_SUPPORT
    657   /* Make sure we don't dump to the terminal, unless forced to with -o - */
    658   if (!outfile_pattern && isatty(fileno(stdout)) && !do_md5 && !noblit) {
    659     fprintf(stderr,
    660             "Not dumping raw video to your terminal. Use '-o -' to "
    661             "override.\n");
    662     return EXIT_FAILURE;
    663   }
    664 #endif
    665   input.vpx_input_ctx->file = infile;
    666   if (file_is_ivf(input.vpx_input_ctx))
    667     input.vpx_input_ctx->file_type = FILE_TYPE_IVF;
    668 #if CONFIG_WEBM_IO
    669   else if (file_is_webm(input.webm_ctx, input.vpx_input_ctx))
    670     input.vpx_input_ctx->file_type = FILE_TYPE_WEBM;
    671 #endif
    672   else if (file_is_raw(input.vpx_input_ctx))
    673     input.vpx_input_ctx->file_type = FILE_TYPE_RAW;
    674   else {
    675     fprintf(stderr, "Unrecognized input file type.\n");
    676 #if !CONFIG_WEBM_IO
    677     fprintf(stderr, "vpxdec was built without WebM container support.\n");
    678 #endif
    679     return EXIT_FAILURE;
    680   }
    681 
    682   outfile_pattern = outfile_pattern ? outfile_pattern : "-";
    683   single_file = is_single_file(outfile_pattern);
    684 
    685   if (!noblit && single_file) {
    686     generate_filename(outfile_pattern, outfile_name, PATH_MAX,
    687                       vpx_input_ctx.width, vpx_input_ctx.height, 0);
    688     if (do_md5)
    689       MD5Init(&md5_ctx);
    690     else
    691       outfile = open_outfile(outfile_name);
    692   }
    693 
    694   if (use_y4m && !noblit) {
    695     if (!single_file) {
    696       fprintf(stderr, "YUV4MPEG2 not supported with output patterns,"
    697               " try --i420 or --yv12.\n");
    698       return EXIT_FAILURE;
    699     }
    700 
    701 #if CONFIG_WEBM_IO
    702     if (vpx_input_ctx.file_type == FILE_TYPE_WEBM) {
    703       if (webm_guess_framerate(input.webm_ctx, input.vpx_input_ctx)) {
    704         fprintf(stderr, "Failed to guess framerate -- error parsing "
    705                 "webm file?\n");
    706         return EXIT_FAILURE;
    707       }
    708     }
    709 #endif
    710   }
    711 
    712   fourcc_interface = get_vpx_decoder_by_fourcc(vpx_input_ctx.fourcc);
    713   if (interface && fourcc_interface && interface != fourcc_interface)
    714     warn("Header indicates codec: %s\n", fourcc_interface->name);
    715   else
    716     interface = fourcc_interface;
    717 
    718   if (!interface)
    719     interface = get_vpx_decoder_by_index(0);
    720 
    721   dec_flags = (postproc ? VPX_CODEC_USE_POSTPROC : 0) |
    722               (ec_enabled ? VPX_CODEC_USE_ERROR_CONCEALMENT : 0);
    723   if (vpx_codec_dec_init(&decoder, interface->interface(), &cfg, dec_flags)) {
    724     fprintf(stderr, "Failed to initialize decoder: %s\n",
    725             vpx_codec_error(&decoder));
    726     return EXIT_FAILURE;
    727   }
    728 
    729   if (!quiet)
    730     fprintf(stderr, "%s\n", decoder.name);
    731 
    732 #if CONFIG_VP8_DECODER
    733 
    734   if (vp8_pp_cfg.post_proc_flag
    735       && vpx_codec_control(&decoder, VP8_SET_POSTPROC, &vp8_pp_cfg)) {
    736     fprintf(stderr, "Failed to configure postproc: %s\n", vpx_codec_error(&decoder));
    737     return EXIT_FAILURE;
    738   }
    739 
    740   if (vp8_dbg_color_ref_frame
    741       && vpx_codec_control(&decoder, VP8_SET_DBG_COLOR_REF_FRAME, vp8_dbg_color_ref_frame)) {
    742     fprintf(stderr, "Failed to configure reference block visualizer: %s\n", vpx_codec_error(&decoder));
    743     return EXIT_FAILURE;
    744   }
    745 
    746   if (vp8_dbg_color_mb_modes
    747       && vpx_codec_control(&decoder, VP8_SET_DBG_COLOR_MB_MODES, vp8_dbg_color_mb_modes)) {
    748     fprintf(stderr, "Failed to configure macro block visualizer: %s\n", vpx_codec_error(&decoder));
    749     return EXIT_FAILURE;
    750   }
    751 
    752   if (vp8_dbg_color_b_modes
    753       && vpx_codec_control(&decoder, VP8_SET_DBG_COLOR_B_MODES, vp8_dbg_color_b_modes)) {
    754     fprintf(stderr, "Failed to configure block visualizer: %s\n", vpx_codec_error(&decoder));
    755     return EXIT_FAILURE;
    756   }
    757 
    758   if (vp8_dbg_display_mv
    759       && vpx_codec_control(&decoder, VP8_SET_DBG_DISPLAY_MV, vp8_dbg_display_mv)) {
    760     fprintf(stderr, "Failed to configure motion vector visualizer: %s\n", vpx_codec_error(&decoder));
    761     return EXIT_FAILURE;
    762   }
    763 #endif
    764 
    765 
    766   if (arg_skip)
    767     fprintf(stderr, "Skipping first %d frames.\n", arg_skip);
    768   while (arg_skip) {
    769     if (read_frame(&input, &buf, &bytes_in_buffer, &buffer_size))
    770       break;
    771     arg_skip--;
    772   }
    773 
    774   if (num_external_frame_buffers > 0) {
    775     ext_fb_list.num_external_frame_buffers = num_external_frame_buffers;
    776     ext_fb_list.ext_fb = (struct ExternalFrameBuffer *)calloc(
    777         num_external_frame_buffers, sizeof(*ext_fb_list.ext_fb));
    778     if (vpx_codec_set_frame_buffer_functions(
    779             &decoder, get_vp9_frame_buffer, release_vp9_frame_buffer,
    780             &ext_fb_list)) {
    781       fprintf(stderr, "Failed to configure external frame buffers: %s\n",
    782               vpx_codec_error(&decoder));
    783       return EXIT_FAILURE;
    784     }
    785   }
    786 
    787   frame_avail = 1;
    788   got_data = 0;
    789 
    790   /* Decode file */
    791   while (frame_avail || got_data) {
    792     vpx_codec_iter_t  iter = NULL;
    793     vpx_image_t    *img;
    794     struct vpx_usec_timer timer;
    795     int                   corrupted;
    796 
    797     frame_avail = 0;
    798     if (!stop_after || frame_in < stop_after) {
    799       if (!read_frame(&input, &buf, &bytes_in_buffer, &buffer_size)) {
    800         frame_avail = 1;
    801         frame_in++;
    802 
    803         vpx_usec_timer_start(&timer);
    804 
    805         if (vpx_codec_decode(&decoder, buf, (unsigned int)bytes_in_buffer,
    806                              NULL, 0)) {
    807           const char *detail = vpx_codec_error_detail(&decoder);
    808           warn("Failed to decode frame %d: %s",
    809                frame_in, vpx_codec_error(&decoder));
    810 
    811           if (detail)
    812             warn("Additional information: %s", detail);
    813           goto fail;
    814         }
    815 
    816         vpx_usec_timer_mark(&timer);
    817         dx_time += vpx_usec_timer_elapsed(&timer);
    818       }
    819     }
    820 
    821     vpx_usec_timer_start(&timer);
    822 
    823     got_data = 0;
    824     if ((img = vpx_codec_get_frame(&decoder, &iter))) {
    825       ++frame_out;
    826       got_data = 1;
    827     }
    828 
    829     vpx_usec_timer_mark(&timer);
    830     dx_time += (unsigned int)vpx_usec_timer_elapsed(&timer);
    831 
    832     if (vpx_codec_control(&decoder, VP8D_GET_FRAME_CORRUPTED, &corrupted)) {
    833       warn("Failed VP8_GET_FRAME_CORRUPTED: %s", vpx_codec_error(&decoder));
    834       goto fail;
    835     }
    836     frames_corrupted += corrupted;
    837 
    838     if (progress)
    839       show_progress(frame_in, frame_out, dx_time);
    840 
    841     if (!noblit && img) {
    842       const int PLANES_YUV[] = {VPX_PLANE_Y, VPX_PLANE_U, VPX_PLANE_V};
    843       const int PLANES_YVU[] = {VPX_PLANE_Y, VPX_PLANE_V, VPX_PLANE_U};
    844       const int *planes = flipuv ? PLANES_YVU : PLANES_YUV;
    845 
    846       if (do_scale) {
    847         if (frame_out == 1) {
    848           // If the output frames are to be scaled to a fixed display size then
    849           // use the width and height specified in the container. If either of
    850           // these is set to 0, use the display size set in the first frame
    851           // header. If that is unavailable, use the raw decoded size of the
    852           // first decoded frame.
    853           int display_width = vpx_input_ctx.width;
    854           int display_height = vpx_input_ctx.height;
    855           if (!display_width || !display_height) {
    856             int display_size[2];
    857             if (vpx_codec_control(&decoder, VP9D_GET_DISPLAY_SIZE,
    858                                   display_size)) {
    859               // As last resort use size of first frame as display size.
    860               display_width = img->d_w;
    861               display_height = img->d_h;
    862             } else {
    863               display_width = display_size[0];
    864               display_height = display_size[1];
    865             }
    866           }
    867           scaled_img = vpx_img_alloc(NULL, VPX_IMG_FMT_I420, display_width,
    868                                      display_height, 16);
    869         }
    870 
    871         if (img->d_w != scaled_img->d_w || img->d_h != scaled_img->d_h) {
    872           vpx_image_scale(img, scaled_img, kFilterBox);
    873           img = scaled_img;
    874         }
    875       }
    876 
    877       if (single_file) {
    878         if (use_y4m) {
    879           char buf[Y4M_BUFFER_SIZE] = {0};
    880           size_t len = 0;
    881           if (frame_out == 1) {
    882             // Y4M file header
    883             len = y4m_write_file_header(buf, sizeof(buf),
    884                                         vpx_input_ctx.width,
    885                                         vpx_input_ctx.height,
    886                                         &vpx_input_ctx.framerate, img->fmt);
    887             if (do_md5) {
    888               MD5Update(&md5_ctx, (md5byte *)buf, (unsigned int)len);
    889             } else {
    890               fputs(buf, outfile);
    891             }
    892           }
    893 
    894           // Y4M frame header
    895           len = y4m_write_frame_header(buf, sizeof(buf));
    896           if (do_md5) {
    897             MD5Update(&md5_ctx, (md5byte *)buf, (unsigned int)len);
    898           } else {
    899             fputs(buf, outfile);
    900           }
    901         }
    902 
    903         if (do_md5) {
    904           update_image_md5(img, planes, &md5_ctx);
    905         } else {
    906           write_image_file(img, planes, outfile);
    907         }
    908       } else {
    909         generate_filename(outfile_pattern, outfile_name, PATH_MAX,
    910                           img->d_w, img->d_h, frame_in);
    911         if (do_md5) {
    912           MD5Init(&md5_ctx);
    913           update_image_md5(img, planes, &md5_ctx);
    914           MD5Final(md5_digest, &md5_ctx);
    915           print_md5(md5_digest, outfile_name);
    916         } else {
    917           outfile = open_outfile(outfile_name);
    918           write_image_file(img, planes, outfile);
    919           fclose(outfile);
    920         }
    921       }
    922     }
    923 
    924     if (stop_after && frame_in >= stop_after)
    925       break;
    926   }
    927 
    928   if (summary || progress) {
    929     show_progress(frame_in, frame_out, dx_time);
    930     fprintf(stderr, "\n");
    931   }
    932 
    933   if (frames_corrupted)
    934     fprintf(stderr, "WARNING: %d frames corrupted.\n", frames_corrupted);
    935 
    936 fail:
    937 
    938   if (vpx_codec_destroy(&decoder)) {
    939     fprintf(stderr, "Failed to destroy decoder: %s\n",
    940             vpx_codec_error(&decoder));
    941     return EXIT_FAILURE;
    942   }
    943 
    944   if (!noblit && single_file) {
    945     if (do_md5) {
    946       MD5Final(md5_digest, &md5_ctx);
    947       print_md5(md5_digest, outfile_name);
    948     } else {
    949       fclose(outfile);
    950     }
    951   }
    952 
    953 #if CONFIG_WEBM_IO
    954   if (input.vpx_input_ctx->file_type == FILE_TYPE_WEBM)
    955     webm_free(input.webm_ctx);
    956 #endif
    957 
    958   if (input.vpx_input_ctx->file_type != FILE_TYPE_WEBM)
    959     free(buf);
    960 
    961   if (scaled_img) vpx_img_free(scaled_img);
    962 
    963   for (i = 0; i < ext_fb_list.num_external_frame_buffers; ++i) {
    964     free(ext_fb_list.ext_fb[i].data);
    965   }
    966   free(ext_fb_list.ext_fb);
    967 
    968   fclose(infile);
    969   free(argv);
    970 
    971   return frames_corrupted ? EXIT_FAILURE : EXIT_SUCCESS;
    972 }
    973 
    974 int main(int argc, const char **argv_) {
    975   unsigned int loops = 1, i;
    976   char **argv, **argi, **argj;
    977   struct arg arg;
    978   int error = 0;
    979 
    980   argv = argv_dup(argc - 1, argv_ + 1);
    981   for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) {
    982     memset(&arg, 0, sizeof(arg));
    983     arg.argv_step = 1;
    984 
    985     if (arg_match(&arg, &looparg, argi)) {
    986       loops = arg_parse_uint(&arg);
    987       break;
    988     }
    989   }
    990   free(argv);
    991   for (i = 0; !error && i < loops; i++)
    992     error = main_loop(argc, argv_);
    993   return error;
    994 }
    995