Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 1070 insertions, 0 deletions

diff --git a/third_party/aom/aomdec.c b/third_party/aom/aomdec.c
new file mode 100644
index 000000000..f74baddb7
--- /dev/null
+++ b/third_party/aom/aomdec.c
@@ -0,0 +1,1070 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <limits.h>
+
+#include "./aom_config.h"
+
+#if CONFIG_OS_SUPPORT
+#if HAVE_UNISTD_H
+#include <unistd.h>  // NOLINT
+#elif !defined(STDOUT_FILENO)
+#define STDOUT_FILENO 1
+#endif
+#endif
+
+#if CONFIG_LIBYUV
+#include "third_party/libyuv/include/libyuv/scale.h"
+#endif
+
+#include "./args.h"
+#include "./ivfdec.h"
+
+#include "aom/aom_decoder.h"
+#include "aom_ports/mem_ops.h"
+#include "aom_ports/aom_timer.h"
+
+#if CONFIG_AV1_DECODER
+#include "aom/aomdx.h"
+#endif
+
+#include "./md5_utils.h"
+
+#include "./tools_common.h"
+#if CONFIG_WEBM_IO
+#include "./webmdec.h"
+#endif
+#include "./y4menc.h"
+
+static const char *exec_name;
+
+struct AvxDecInputContext {
+  struct AvxInputContext *aom_input_ctx;
+  struct WebmInputContext *webm_ctx;
+};
+
+static const arg_def_t looparg =
+    ARG_DEF(NULL, "loops", 1, "Number of times to decode the file");
+static const arg_def_t codecarg = ARG_DEF(NULL, "codec", 1, "Codec to use");
+static const arg_def_t use_yv12 =
+    ARG_DEF(NULL, "yv12", 0, "Output raw YV12 frames");
+static const arg_def_t use_i420 =
+    ARG_DEF(NULL, "i420", 0, "Output raw I420 frames");
+static const arg_def_t flipuvarg =
+    ARG_DEF(NULL, "flipuv", 0, "Flip the chroma planes in the output");
+static const arg_def_t rawvideo =
+    ARG_DEF(NULL, "rawvideo", 0, "Output raw YUV frames");
+static const arg_def_t noblitarg =
+    ARG_DEF(NULL, "noblit", 0, "Don't process the decoded frames");
+static const arg_def_t progressarg =
+    ARG_DEF(NULL, "progress", 0, "Show progress after each frame decodes");
+static const arg_def_t limitarg =
+    ARG_DEF(NULL, "limit", 1, "Stop decoding after n frames");
+static const arg_def_t skiparg =
+    ARG_DEF(NULL, "skip", 1, "Skip the first n input frames");
+static const arg_def_t postprocarg =
+    ARG_DEF(NULL, "postproc", 0, "Postprocess decoded frames");
+static const arg_def_t summaryarg =
+    ARG_DEF(NULL, "summary", 0, "Show timing summary");
+static const arg_def_t outputfile =
+    ARG_DEF("o", "output", 1, "Output file name pattern (see below)");
+static const arg_def_t threadsarg =
+    ARG_DEF("t", "threads", 1, "Max threads to use");
+static const arg_def_t frameparallelarg =
+    ARG_DEF(NULL, "frame-parallel", 0, "Frame parallel decode");
+static const arg_def_t verbosearg =
+    ARG_DEF("v", "verbose", 0, "Show version string");
+static const arg_def_t error_concealment =
+    ARG_DEF(NULL, "error-concealment", 0, "Enable decoder error-concealment");
+static const arg_def_t scalearg =
+    ARG_DEF("S", "scale", 0, "Scale output frames uniformly");
+static const arg_def_t continuearg =
+    ARG_DEF("k", "keep-going", 0, "(debug) Continue decoding after error");
+static const arg_def_t fb_arg =
+    ARG_DEF(NULL, "frame-buffers", 1, "Number of frame buffers to use");
+static const arg_def_t md5arg =
+    ARG_DEF(NULL, "md5", 0, "Compute the MD5 sum of the decoded frame");
+static const arg_def_t framestatsarg =
+    ARG_DEF(NULL, "framestats", 1, "Output per-frame stats (.csv format)");
+#if CONFIG_HIGHBITDEPTH
+static const arg_def_t outbitdeptharg =
+    ARG_DEF(NULL, "output-bit-depth", 1, "Output bit-depth for decoded frames");
+#endif
+#if CONFIG_EXT_TILE
+static const arg_def_t tiler = ARG_DEF(NULL, "tile-row", 1,
+                                       "Row index of tile to decode "
+                                       "(-1 for all rows)");
+static const arg_def_t tilec = ARG_DEF(NULL, "tile-column", 1,
+                                       "Column index of tile to decode "
+                                       "(-1 for all columns)");
+#endif  // CONFIG_EXT_TILE
+
+static const arg_def_t *all_args[] = { &codecarg,
+                                       &use_yv12,
+                                       &use_i420,
+                                       &flipuvarg,
+                                       &rawvideo,
+                                       &noblitarg,
+                                       &progressarg,
+                                       &limitarg,
+                                       &skiparg,
+                                       &postprocarg,
+                                       &summaryarg,
+                                       &outputfile,
+                                       &threadsarg,
+                                       &frameparallelarg,
+                                       &verbosearg,
+                                       &scalearg,
+                                       &fb_arg,
+                                       &md5arg,
+                                       &framestatsarg,
+                                       &error_concealment,
+                                       &continuearg,
+#if CONFIG_HIGHBITDEPTH
+                                       &outbitdeptharg,
+#endif
+#if CONFIG_EXT_TILE
+                                       &tiler,
+                                       &tilec,
+#endif  // CONFIG_EXT_TILE
+                                       NULL };
+
+#if CONFIG_LIBYUV
+static INLINE int libyuv_scale(aom_image_t *src, aom_image_t *dst,
+                               FilterModeEnum mode) {
+#if CONFIG_HIGHBITDEPTH
+  if (src->fmt == AOM_IMG_FMT_I42016) {
+    assert(dst->fmt == AOM_IMG_FMT_I42016);
+    return I420Scale_16(
+        (uint16_t *)src->planes[AOM_PLANE_Y], src->stride[AOM_PLANE_Y] / 2,
+        (uint16_t *)src->planes[AOM_PLANE_U], src->stride[AOM_PLANE_U] / 2,
+        (uint16_t *)src->planes[AOM_PLANE_V], src->stride[AOM_PLANE_V] / 2,
+        src->d_w, src->d_h, (uint16_t *)dst->planes[AOM_PLANE_Y],
+        dst->stride[AOM_PLANE_Y] / 2, (uint16_t *)dst->planes[AOM_PLANE_U],
+        dst->stride[AOM_PLANE_U] / 2, (uint16_t *)dst->planes[AOM_PLANE_V],
+        dst->stride[AOM_PLANE_V] / 2, dst->d_w, dst->d_h, mode);
+  }
+#endif
+  assert(src->fmt == AOM_IMG_FMT_I420);
+  assert(dst->fmt == AOM_IMG_FMT_I420);
+  return I420Scale(src->planes[AOM_PLANE_Y], src->stride[AOM_PLANE_Y],
+                   src->planes[AOM_PLANE_U], src->stride[AOM_PLANE_U],
+                   src->planes[AOM_PLANE_V], src->stride[AOM_PLANE_V], src->d_w,
+                   src->d_h, dst->planes[AOM_PLANE_Y], dst->stride[AOM_PLANE_Y],
+                   dst->planes[AOM_PLANE_U], dst->stride[AOM_PLANE_U],
+                   dst->planes[AOM_PLANE_V], dst->stride[AOM_PLANE_V], dst->d_w,
+                   dst->d_h, mode);
+}
+#endif
+
+void usage_exit(void) {
+  int i;
+
+  fprintf(stderr,
+          "Usage: %s <options> filename\n\n"
+          "Options:\n",
+          exec_name);
+  arg_show_usage(stderr, all_args);
+  fprintf(stderr,
+          "\nOutput File Patterns:\n\n"
+          "  The -o argument specifies the name of the file(s) to "
+          "write to. If the\n  argument does not include any escape "
+          "characters, the output will be\n  written to a single file. "
+          "Otherwise, the filename will be calculated by\n  expanding "
+          "the following escape characters:\n");
+  fprintf(stderr,
+          "\n\t%%w   - Frame width"
+          "\n\t%%h   - Frame height"
+          "\n\t%%<n> - Frame number, zero padded to <n> places (1..9)"
+          "\n\n  Pattern arguments are only supported in conjunction "
+          "with the --yv12 and\n  --i420 options. If the -o option is "
+          "not specified, the output will be\n  directed to stdout.\n");
+  fprintf(stderr, "\nIncluded decoders:\n\n");
+
+  for (i = 0; i < get_aom_decoder_count(); ++i) {
+    const AvxInterface *const decoder = get_aom_decoder_by_index(i);
+    fprintf(stderr, "    %-6s - %s\n", decoder->name,
+            aom_codec_iface_name(decoder->codec_interface()));
+  }
+
+  exit(EXIT_FAILURE);
+}
+
+static int raw_read_frame(FILE *infile, uint8_t **buffer, size_t *bytes_read,
+                          size_t *buffer_size) {
+  char raw_hdr[RAW_FRAME_HDR_SZ];
+  size_t frame_size = 0;
+
+  if (fread(raw_hdr, RAW_FRAME_HDR_SZ, 1, infile) != 1) {
+    if (!feof(infile)) warn("Failed to read RAW frame size\n");
+  } else {
+    const size_t kCorruptFrameThreshold = 256 * 1024 * 1024;
+    const size_t kFrameTooSmallThreshold = 256 * 1024;
+    frame_size = mem_get_le32(raw_hdr);
+
+    if (frame_size > kCorruptFrameThreshold) {
+      warn("Read invalid frame size (%u)\n", (unsigned int)frame_size);
+      frame_size = 0;
+    }
+
+    if (frame_size < kFrameTooSmallThreshold) {
+      warn("Warning: Read invalid frame size (%u) - not a raw file?\n",
+           (unsigned int)frame_size);
+    }
+
+    if (frame_size > *buffer_size) {
+      uint8_t *new_buf = realloc(*buffer, 2 * frame_size);
+      if (new_buf) {
+        *buffer = new_buf;
+        *buffer_size = 2 * frame_size;
+      } else {
+        warn("Failed to allocate compressed data buffer\n");
+        frame_size = 0;
+      }
+    }
+  }
+
+  if (!feof(infile)) {
+    if (fread(*buffer, 1, frame_size, infile) != frame_size) {
+      warn("Failed to read full frame\n");
+      return 1;
+    }
+    *bytes_read = frame_size;
+  }
+
+  return 0;
+}
+
+static int read_frame(struct AvxDecInputContext *input, uint8_t **buf,
+                      size_t *bytes_in_buffer, size_t *buffer_size) {
+  switch (input->aom_input_ctx->file_type) {
+#if CONFIG_WEBM_IO
+    case FILE_TYPE_WEBM:
+      return webm_read_frame(input->webm_ctx, buf, bytes_in_buffer);
+#endif
+    case FILE_TYPE_RAW:
+      return raw_read_frame(input->aom_input_ctx->file, buf, bytes_in_buffer,
+                            buffer_size);
+    case FILE_TYPE_IVF:
+      return ivf_read_frame(input->aom_input_ctx->file, buf, bytes_in_buffer,
+                            buffer_size);
+    default: return 1;
+  }
+}
+
+static void update_image_md5(const aom_image_t *img, const int planes[3],
+                             MD5Context *md5) {
+  int i, y;
+
+  for (i = 0; i < 3; ++i) {
+    const int plane = planes[i];
+    const unsigned char *buf = img->planes[plane];
+    const int stride = img->stride[plane];
+    const int w = aom_img_plane_width(img, plane) *
+                  ((img->fmt & AOM_IMG_FMT_HIGHBITDEPTH) ? 2 : 1);
+    const int h = aom_img_plane_height(img, plane);
+
+    for (y = 0; y < h; ++y) {
+      MD5Update(md5, buf, w);
+      buf += stride;
+    }
+  }
+}
+
+static void write_image_file(const aom_image_t *img, const int planes[3],
+                             FILE *file) {
+  int i, y;
+#if CONFIG_HIGHBITDEPTH
+  const int bytes_per_sample = ((img->fmt & AOM_IMG_FMT_HIGHBITDEPTH) ? 2 : 1);
+#else
+  const int bytes_per_sample = 1;
+#endif
+
+  for (i = 0; i < 3; ++i) {
+    const int plane = planes[i];
+    const unsigned char *buf = img->planes[plane];
+    const int stride = img->stride[plane];
+    const int w = aom_img_plane_width(img, plane);
+    const int h = aom_img_plane_height(img, plane);
+
+    for (y = 0; y < h; ++y) {
+      fwrite(buf, bytes_per_sample, w, file);
+      buf += stride;
+    }
+  }
+}
+
+static int file_is_raw(struct AvxInputContext *input) {
+  uint8_t buf[32];
+  int is_raw = 0;
+  aom_codec_stream_info_t si;
+
+  si.sz = sizeof(si);
+
+  if (fread(buf, 1, 32, input->file) == 32) {
+    int i;
+
+    if (mem_get_le32(buf) < 256 * 1024 * 1024) {
+      for (i = 0; i < get_aom_decoder_count(); ++i) {
+        const AvxInterface *const decoder = get_aom_decoder_by_index(i);
+        if (!aom_codec_peek_stream_info(decoder->codec_interface(), buf + 4,
+                                        32 - 4, &si)) {
+          is_raw = 1;
+          input->fourcc = decoder->fourcc;
+          input->width = si.w;
+          input->height = si.h;
+          input->framerate.numerator = 30;
+          input->framerate.denominator = 1;
+          break;
+        }
+      }
+    }
+  }
+
+  rewind(input->file);
+  return is_raw;
+}
+
+static void show_progress(int frame_in, int frame_out, uint64_t dx_time) {
+  fprintf(stderr,
+          "%d decoded frames/%d showed frames in %" PRId64 " us (%.2f fps)\r",
+          frame_in, frame_out, dx_time,
+          (double)frame_out * 1000000.0 / (double)dx_time);
+}
+
+struct ExternalFrameBuffer {
+  uint8_t *data;
+  size_t size;
+  int in_use;
+};
+
+struct ExternalFrameBufferList {
+  int num_external_frame_buffers;
+  struct ExternalFrameBuffer *ext_fb;
+};
+
+// Callback used by libaom to request an external frame buffer. |cb_priv|
+// Application private data passed into the set function. |min_size| is the
+// minimum size in bytes needed to decode the next frame. |fb| pointer to the
+// frame buffer.
+static int get_av1_frame_buffer(void *cb_priv, size_t min_size,
+                                aom_codec_frame_buffer_t *fb) {
+  int i;
+  struct ExternalFrameBufferList *const ext_fb_list =
+      (struct ExternalFrameBufferList *)cb_priv;
+  if (ext_fb_list == NULL) return -1;
+
+  // Find a free frame buffer.
+  for (i = 0; i < ext_fb_list->num_external_frame_buffers; ++i) {
+    if (!ext_fb_list->ext_fb[i].in_use) break;
+  }
+
+  if (i == ext_fb_list->num_external_frame_buffers) return -1;
+
+  if (ext_fb_list->ext_fb[i].size < min_size) {
+    free(ext_fb_list->ext_fb[i].data);
+    ext_fb_list->ext_fb[i].data = (uint8_t *)calloc(min_size, sizeof(uint8_t));
+    if (!ext_fb_list->ext_fb[i].data) return -1;
+
+    ext_fb_list->ext_fb[i].size = min_size;
+  }
+
+  fb->data = ext_fb_list->ext_fb[i].data;
+  fb->size = ext_fb_list->ext_fb[i].size;
+  ext_fb_list->ext_fb[i].in_use = 1;
+
+  // Set the frame buffer's private data to point at the external frame buffer.
+  fb->priv = &ext_fb_list->ext_fb[i];
+  return 0;
+}
+
+// Callback used by libaom when there are no references to the frame buffer.
+// |cb_priv| user private data passed into the set function. |fb| pointer
+// to the frame buffer.
+static int release_av1_frame_buffer(void *cb_priv,
+                                    aom_codec_frame_buffer_t *fb) {
+  struct ExternalFrameBuffer *const ext_fb =
+      (struct ExternalFrameBuffer *)fb->priv;
+  (void)cb_priv;
+  ext_fb->in_use = 0;
+  return 0;
+}
+
+static void generate_filename(const char *pattern, char *out, size_t q_len,
+                              unsigned int d_w, unsigned int d_h,
+                              unsigned int frame_in) {
+  const char *p = pattern;
+  char *q = out;
+
+  do {
+    char *next_pat = strchr(p, '%');
+
+    if (p == next_pat) {
+      size_t pat_len;
+
+      /* parse the pattern */
+      q[q_len - 1] = '\0';
+      switch (p[1]) {
+        case 'w': snprintf(q, q_len - 1, "%d", d_w); break;
+        case 'h': snprintf(q, q_len - 1, "%d", d_h); break;
+        case '1': snprintf(q, q_len - 1, "%d", frame_in); break;
+        case '2': snprintf(q, q_len - 1, "%02d", frame_in); break;
+        case '3': snprintf(q, q_len - 1, "%03d", frame_in); break;
+        case '4': snprintf(q, q_len - 1, "%04d", frame_in); break;
+        case '5': snprintf(q, q_len - 1, "%05d", frame_in); break;
+        case '6': snprintf(q, q_len - 1, "%06d", frame_in); break;
+        case '7': snprintf(q, q_len - 1, "%07d", frame_in); break;
+        case '8': snprintf(q, q_len - 1, "%08d", frame_in); break;
+        case '9': snprintf(q, q_len - 1, "%09d", frame_in); break;
+        default: die("Unrecognized pattern %%%c\n", p[1]); break;
+      }
+
+      pat_len = strlen(q);
+      if (pat_len >= q_len - 1) die("Output filename too long.\n");
+      q += pat_len;
+      p += 2;
+      q_len -= pat_len;
+    } else {
+      size_t copy_len;
+
+      /* copy the next segment */
+      if (!next_pat)
+        copy_len = strlen(p);
+      else
+        copy_len = next_pat - p;
+
+      if (copy_len >= q_len - 1) die("Output filename too long.\n");
+
+      memcpy(q, p, copy_len);
+      q[copy_len] = '\0';
+      q += copy_len;
+      p += copy_len;
+      q_len -= copy_len;
+    }
+  } while (*p);
+}
+
+static int is_single_file(const char *outfile_pattern) {
+  const char *p = outfile_pattern;
+
+  do {
+    p = strchr(p, '%');
+    if (p && p[1] >= '1' && p[1] <= '9')
+      return 0;  // pattern contains sequence number, so it's not unique
+    if (p) p++;
+  } while (p);
+
+  return 1;
+}
+
+static void print_md5(unsigned char digest[16], const char *filename) {
+  int i;
+
+  for (i = 0; i < 16; ++i) printf("%02x", digest[i]);
+  printf("  %s\n", filename);
+}
+
+static FILE *open_outfile(const char *name) {
+  if (strcmp("-", name) == 0) {
+    set_binary_mode(stdout);
+    return stdout;
+  } else {
+    FILE *file = fopen(name, "wb");
+    if (!file) fatal("Failed to open output file '%s'", name);
+    return file;
+  }
+}
+
+#if CONFIG_HIGHBITDEPTH
+static int img_shifted_realloc_required(const aom_image_t *img,
+                                        const aom_image_t *shifted,
+                                        aom_img_fmt_t required_fmt) {
+  return img->d_w != shifted->d_w || img->d_h != shifted->d_h ||
+         required_fmt != shifted->fmt;
+}
+#endif
+
+static int main_loop(int argc, const char **argv_) {
+  aom_codec_ctx_t decoder;
+  char *fn = NULL;
+  int i;
+  int ret = EXIT_FAILURE;
+  uint8_t *buf = NULL;
+  size_t bytes_in_buffer = 0, buffer_size = 0;
+  FILE *infile;
+  int frame_in = 0, frame_out = 0, flipuv = 0, noblit = 0;
+  int do_md5 = 0, progress = 0, frame_parallel = 0;
+  int stop_after = 0, postproc = 0, summary = 0, quiet = 1;
+  int arg_skip = 0;
+  int ec_enabled = 0;
+  int keep_going = 0;
+  const AvxInterface *interface = NULL;
+  const AvxInterface *fourcc_interface = NULL;
+  uint64_t dx_time = 0;
+  struct arg arg;
+  char **argv, **argi, **argj;
+
+  int single_file;
+  int use_y4m = 1;
+  int opt_yv12 = 0;
+  int opt_i420 = 0;
+  aom_codec_dec_cfg_t cfg = { 0, 0, 0 };
+#if CONFIG_HIGHBITDEPTH
+  unsigned int output_bit_depth = 0;
+#endif
+#if CONFIG_EXT_TILE
+  int tile_row = -1;
+  int tile_col = -1;
+#endif  // CONFIG_EXT_TILE
+  int frames_corrupted = 0;
+  int dec_flags = 0;
+  int do_scale = 0;
+  aom_image_t *scaled_img = NULL;
+#if CONFIG_HIGHBITDEPTH
+  aom_image_t *img_shifted = NULL;
+#endif
+  int frame_avail, got_data, flush_decoder = 0;
+  int num_external_frame_buffers = 0;
+  struct ExternalFrameBufferList ext_fb_list = { 0, NULL };
+
+  const char *outfile_pattern = NULL;
+  char outfile_name[PATH_MAX] = { 0 };
+  FILE *outfile = NULL;
+
+  FILE *framestats_file = NULL;
+
+  MD5Context md5_ctx;
+  unsigned char md5_digest[16];
+
+  struct AvxDecInputContext input = { NULL, NULL };
+  struct AvxInputContext aom_input_ctx;
+#if CONFIG_WEBM_IO
+  struct WebmInputContext webm_ctx;
+  memset(&(webm_ctx), 0, sizeof(webm_ctx));
+  input.webm_ctx = &webm_ctx;
+#endif
+  input.aom_input_ctx = &aom_input_ctx;
+
+  /* Parse command line */
+  exec_name = argv_[0];
+  argv = argv_dup(argc - 1, argv_ + 1);
+
+  for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) {
+    memset(&arg, 0, sizeof(arg));
+    arg.argv_step = 1;
+
+    if (arg_match(&arg, &codecarg, argi)) {
+      interface = get_aom_decoder_by_name(arg.val);
+      if (!interface)
+        die("Error: Unrecognized argument (%s) to --codec\n", arg.val);
+    } else if (arg_match(&arg, &looparg, argi)) {
+      // no-op
+    } else if (arg_match(&arg, &outputfile, argi)) {
+      outfile_pattern = arg.val;
+    } else if (arg_match(&arg, &use_yv12, argi)) {
+      use_y4m = 0;
+      flipuv = 1;
+      opt_yv12 = 1;
+    } else if (arg_match(&arg, &use_i420, argi)) {
+      use_y4m = 0;
+      flipuv = 0;
+      opt_i420 = 1;
+    } else if (arg_match(&arg, &rawvideo, argi)) {
+      use_y4m = 0;
+    } else if (arg_match(&arg, &flipuvarg, argi)) {
+      flipuv = 1;
+    } else if (arg_match(&arg, &noblitarg, argi)) {
+      noblit = 1;
+    } else if (arg_match(&arg, &progressarg, argi)) {
+      progress = 1;
+    } else if (arg_match(&arg, &limitarg, argi)) {
+      stop_after = arg_parse_uint(&arg);
+    } else if (arg_match(&arg, &skiparg, argi)) {
+      arg_skip = arg_parse_uint(&arg);
+    } else if (arg_match(&arg, &postprocarg, argi)) {
+      postproc = 1;
+    } else if (arg_match(&arg, &md5arg, argi)) {
+      do_md5 = 1;
+    } else if (arg_match(&arg, &framestatsarg, argi)) {
+      framestats_file = fopen(arg.val, "w");
+      if (!framestats_file) {
+        die("Error: Could not open --framestats file (%s) for writing.\n",
+            arg.val);
+      }
+    } else if (arg_match(&arg, &summaryarg, argi)) {
+      summary = 1;
+    } else if (arg_match(&arg, &threadsarg, argi)) {
+      cfg.threads = arg_parse_uint(&arg);
+    }
+#if CONFIG_AV1_DECODER
+    else if (arg_match(&arg, &frameparallelarg, argi))
+      frame_parallel = 1;
+#endif
+    else if (arg_match(&arg, &verbosearg, argi))
+      quiet = 0;
+    else if (arg_match(&arg, &scalearg, argi))
+      do_scale = 1;
+    else if (arg_match(&arg, &fb_arg, argi))
+      num_external_frame_buffers = arg_parse_uint(&arg);
+    else if (arg_match(&arg, &continuearg, argi))
+      keep_going = 1;
+#if CONFIG_HIGHBITDEPTH
+    else if (arg_match(&arg, &outbitdeptharg, argi)) {
+      output_bit_depth = arg_parse_uint(&arg);
+    }
+#endif
+#if CONFIG_EXT_TILE
+    else if (arg_match(&arg, &tiler, argi))
+      tile_row = arg_parse_int(&arg);
+    else if (arg_match(&arg, &tilec, argi))
+      tile_col = arg_parse_int(&arg);
+#endif  // CONFIG_EXT_TILE
+    else
+      argj++;
+  }
+
+  /* Check for unrecognized options */
+  for (argi = argv; *argi; argi++)
+    if (argi[0][0] == '-' && strlen(argi[0]) > 1)
+      die("Error: Unrecognized option %s\n", *argi);
+
+  /* Handle non-option arguments */
+  fn = argv[0];
+
+  if (!fn) {
+    free(argv);
+    usage_exit();
+  }
+  /* Open file */
+  infile = strcmp(fn, "-") ? fopen(fn, "rb") : set_binary_mode(stdin);
+
+  if (!infile) {
+    fatal("Failed to open input file '%s'", strcmp(fn, "-") ? fn : "stdin");
+  }
+#if CONFIG_OS_SUPPORT
+  /* Make sure we don't dump to the terminal, unless forced to with -o - */
+  if (!outfile_pattern && isatty(STDOUT_FILENO) && !do_md5 && !noblit) {
+    fprintf(stderr,
+            "Not dumping raw video to your terminal. Use '-o -' to "
+            "override.\n");
+    return EXIT_FAILURE;
+  }
+#endif
+  input.aom_input_ctx->file = infile;
+  if (file_is_ivf(input.aom_input_ctx))
+    input.aom_input_ctx->file_type = FILE_TYPE_IVF;
+#if CONFIG_WEBM_IO
+  else if (file_is_webm(input.webm_ctx, input.aom_input_ctx))
+    input.aom_input_ctx->file_type = FILE_TYPE_WEBM;
+#endif
+  else if (file_is_raw(input.aom_input_ctx))
+    input.aom_input_ctx->file_type = FILE_TYPE_RAW;
+  else {
+    fprintf(stderr, "Unrecognized input file type.\n");
+#if !CONFIG_WEBM_IO
+    fprintf(stderr, "aomdec was built without WebM container support.\n");
+#endif
+    return EXIT_FAILURE;
+  }
+
+  outfile_pattern = outfile_pattern ? outfile_pattern : "-";
+  single_file = is_single_file(outfile_pattern);
+
+  if (!noblit && single_file) {
+    generate_filename(outfile_pattern, outfile_name, PATH_MAX,
+                      aom_input_ctx.width, aom_input_ctx.height, 0);
+    if (do_md5)
+      MD5Init(&md5_ctx);
+    else
+      outfile = open_outfile(outfile_name);
+  }
+
+  if (use_y4m && !noblit) {
+    if (!single_file) {
+      fprintf(stderr,
+              "YUV4MPEG2 not supported with output patterns,"
+              " try --i420 or --yv12 or --rawvideo.\n");
+      return EXIT_FAILURE;
+    }
+
+#if CONFIG_WEBM_IO
+    if (aom_input_ctx.file_type == FILE_TYPE_WEBM) {
+      if (webm_guess_framerate(input.webm_ctx, input.aom_input_ctx)) {
+        fprintf(stderr,
+                "Failed to guess framerate -- error parsing "
+                "webm file?\n");
+        return EXIT_FAILURE;
+      }
+    }
+#endif
+  }
+
+  fourcc_interface = get_aom_decoder_by_fourcc(aom_input_ctx.fourcc);
+  if (interface && fourcc_interface && interface != fourcc_interface)
+    warn("Header indicates codec: %s\n", fourcc_interface->name);
+  else
+    interface = fourcc_interface;
+
+  if (!interface) interface = get_aom_decoder_by_index(0);
+
+  dec_flags = (postproc ? AOM_CODEC_USE_POSTPROC : 0) |
+              (ec_enabled ? AOM_CODEC_USE_ERROR_CONCEALMENT : 0) |
+              (frame_parallel ? AOM_CODEC_USE_FRAME_THREADING : 0);
+  if (aom_codec_dec_init(&decoder, interface->codec_interface(), &cfg,
+                         dec_flags)) {
+    fprintf(stderr, "Failed to initialize decoder: %s\n",
+            aom_codec_error(&decoder));
+    goto fail2;
+  }
+
+  if (!quiet) fprintf(stderr, "%s\n", decoder.name);
+
+#if CONFIG_AV1_DECODER && CONFIG_EXT_TILE
+  if (aom_codec_control(&decoder, AV1_SET_DECODE_TILE_ROW, tile_row)) {
+    fprintf(stderr, "Failed to set decode_tile_row: %s\n",
+            aom_codec_error(&decoder));
+    goto fail;
+  }
+
+  if (aom_codec_control(&decoder, AV1_SET_DECODE_TILE_COL, tile_col)) {
+    fprintf(stderr, "Failed to set decode_tile_col: %s\n",
+            aom_codec_error(&decoder));
+    goto fail;
+  }
+#endif
+
+  if (arg_skip) fprintf(stderr, "Skipping first %d frames.\n", arg_skip);
+  while (arg_skip) {
+    if (read_frame(&input, &buf, &bytes_in_buffer, &buffer_size)) break;
+    arg_skip--;
+  }
+
+  if (num_external_frame_buffers > 0) {
+    ext_fb_list.num_external_frame_buffers = num_external_frame_buffers;
+    ext_fb_list.ext_fb = (struct ExternalFrameBuffer *)calloc(
+        num_external_frame_buffers, sizeof(*ext_fb_list.ext_fb));
+    if (aom_codec_set_frame_buffer_functions(&decoder, get_av1_frame_buffer,
+                                             release_av1_frame_buffer,
+                                             &ext_fb_list)) {
+      fprintf(stderr, "Failed to configure external frame buffers: %s\n",
+              aom_codec_error(&decoder));
+      goto fail;
+    }
+  }
+
+  frame_avail = 1;
+  got_data = 0;
+
+  if (framestats_file) fprintf(framestats_file, "bytes,qp\r\n");
+
+  /* Decode file */
+  while (frame_avail || got_data) {
+    aom_codec_iter_t iter = NULL;
+    aom_image_t *img;
+    struct aom_usec_timer timer;
+    int corrupted = 0;
+
+    frame_avail = 0;
+    if (!stop_after || frame_in < stop_after) {
+      if (!read_frame(&input, &buf, &bytes_in_buffer, &buffer_size)) {
+        frame_avail = 1;
+        frame_in++;
+
+        aom_usec_timer_start(&timer);
+
+        if (aom_codec_decode(&decoder, buf, (unsigned int)bytes_in_buffer, NULL,
+                             0)) {
+          const char *detail = aom_codec_error_detail(&decoder);
+          warn("Failed to decode frame %d: %s", frame_in,
+               aom_codec_error(&decoder));
+
+          if (detail) warn("Additional information: %s", detail);
+          if (!keep_going) goto fail;
+        }
+
+        if (framestats_file) {
+          int qp;
+          if (aom_codec_control(&decoder, AOMD_GET_LAST_QUANTIZER, &qp)) {
+            warn("Failed AOMD_GET_LAST_QUANTIZER: %s",
+                 aom_codec_error(&decoder));
+            if (!keep_going) goto fail;
+          }
+          fprintf(framestats_file, "%d,%d\r\n", (int)bytes_in_buffer, qp);
+        }
+
+        aom_usec_timer_mark(&timer);
+        dx_time += aom_usec_timer_elapsed(&timer);
+      } else {
+        flush_decoder = 1;
+      }
+    } else {
+      flush_decoder = 1;
+    }
+
+    aom_usec_timer_start(&timer);
+
+    if (flush_decoder) {
+      // Flush the decoder in frame parallel decode.
+      if (aom_codec_decode(&decoder, NULL, 0, NULL, 0)) {
+        warn("Failed to flush decoder: %s", aom_codec_error(&decoder));
+      }
+    }
+
+    got_data = 0;
+    if ((img = aom_codec_get_frame(&decoder, &iter))) {
+      ++frame_out;
+      got_data = 1;
+    }
+
+    aom_usec_timer_mark(&timer);
+    dx_time += (unsigned int)aom_usec_timer_elapsed(&timer);
+
+    if (!frame_parallel &&
+        aom_codec_control(&decoder, AOMD_GET_FRAME_CORRUPTED, &corrupted)) {
+      warn("Failed AOM_GET_FRAME_CORRUPTED: %s", aom_codec_error(&decoder));
+      if (!keep_going) goto fail;
+    }
+    frames_corrupted += corrupted;
+
+    if (progress) show_progress(frame_in, frame_out, dx_time);
+
+    if (!noblit && img) {
+      const int PLANES_YUV[] = { AOM_PLANE_Y, AOM_PLANE_U, AOM_PLANE_V };
+      const int PLANES_YVU[] = { AOM_PLANE_Y, AOM_PLANE_V, AOM_PLANE_U };
+      const int *planes = flipuv ? PLANES_YVU : PLANES_YUV;
+
+      if (do_scale) {
+        if (frame_out == 1) {
+          // If the output frames are to be scaled to a fixed display size then
+          // use the width and height specified in the container. If either of
+          // these is set to 0, use the display size set in the first frame
+          // header. If that is unavailable, use the raw decoded size of the
+          // first decoded frame.
+          int render_width = aom_input_ctx.width;
+          int render_height = aom_input_ctx.height;
+          if (!render_width || !render_height) {
+            int render_size[2];
+            if (aom_codec_control(&decoder, AV1D_GET_DISPLAY_SIZE,
+                                  render_size)) {
+              // As last resort use size of first frame as display size.
+              render_width = img->d_w;
+              render_height = img->d_h;
+            } else {
+              render_width = render_size[0];
+              render_height = render_size[1];
+            }
+          }
+          scaled_img =
+              aom_img_alloc(NULL, img->fmt, render_width, render_height, 16);
+          scaled_img->bit_depth = img->bit_depth;
+        }
+
+        if (img->d_w != scaled_img->d_w || img->d_h != scaled_img->d_h) {
+#if CONFIG_LIBYUV
+          libyuv_scale(img, scaled_img, kFilterBox);
+          img = scaled_img;
+#else
+          fprintf(stderr,
+                  "Failed  to scale output frame: %s.\n"
+                  "Scaling is disabled in this configuration. "
+                  "To enable scaling, configure with --enable-libyuv\n",
+                  aom_codec_error(&decoder));
+          goto fail;
+#endif
+        }
+      }
+#if CONFIG_HIGHBITDEPTH
+      // Default to codec bit depth if output bit depth not set
+      if (!output_bit_depth && single_file && !do_md5) {
+        output_bit_depth = img->bit_depth;
+      }
+      // Shift up or down if necessary
+      if (output_bit_depth != 0 && output_bit_depth != img->bit_depth) {
+        const aom_img_fmt_t shifted_fmt =
+            output_bit_depth == 8
+                ? img->fmt ^ (img->fmt & AOM_IMG_FMT_HIGHBITDEPTH)
+                : img->fmt | AOM_IMG_FMT_HIGHBITDEPTH;
+        if (img_shifted &&
+            img_shifted_realloc_required(img, img_shifted, shifted_fmt)) {
+          aom_img_free(img_shifted);
+          img_shifted = NULL;
+        }
+        if (!img_shifted) {
+          img_shifted =
+              aom_img_alloc(NULL, shifted_fmt, img->d_w, img->d_h, 16);
+          img_shifted->bit_depth = output_bit_depth;
+        }
+        if (output_bit_depth > img->bit_depth) {
+          aom_img_upshift(img_shifted, img, output_bit_depth - img->bit_depth);
+        } else {
+          aom_img_downshift(img_shifted, img,
+                            img->bit_depth - output_bit_depth);
+        }
+        img = img_shifted;
+      }
+#endif
+
+#if CONFIG_EXT_TILE
+      aom_input_ctx.width = img->d_w;
+      aom_input_ctx.height = img->d_h;
+#endif  // CONFIG_EXT_TILE
+
+      if (single_file) {
+        if (use_y4m) {
+          char y4m_buf[Y4M_BUFFER_SIZE] = { 0 };
+          size_t len = 0;
+          if (img->fmt == AOM_IMG_FMT_I440 || img->fmt == AOM_IMG_FMT_I44016) {
+            fprintf(stderr, "Cannot produce y4m output for 440 sampling.\n");
+            goto fail;
+          }
+          if (frame_out == 1) {
+            // Y4M file header
+            len = y4m_write_file_header(
+                y4m_buf, sizeof(y4m_buf), aom_input_ctx.width,
+                aom_input_ctx.height, &aom_input_ctx.framerate, img->fmt,
+                img->bit_depth);
+            if (do_md5) {
+              MD5Update(&md5_ctx, (md5byte *)y4m_buf, (unsigned int)len);
+            } else {
+              fputs(y4m_buf, outfile);
+            }
+          }
+
+          // Y4M frame header
+          len = y4m_write_frame_header(y4m_buf, sizeof(y4m_buf));
+          if (do_md5) {
+            MD5Update(&md5_ctx, (md5byte *)y4m_buf, (unsigned int)len);
+          } else {
+            fputs(y4m_buf, outfile);
+          }
+        } else {
+          if (frame_out == 1) {
+            // Check if --yv12 or --i420 options are consistent with the
+            // bit-stream decoded
+            if (opt_i420) {
+              if (img->fmt != AOM_IMG_FMT_I420 &&
+                  img->fmt != AOM_IMG_FMT_I42016) {
+                fprintf(stderr, "Cannot produce i420 output for bit-stream.\n");
+                goto fail;
+              }
+            }
+            if (opt_yv12) {
+              if ((img->fmt != AOM_IMG_FMT_I420 &&
+                   img->fmt != AOM_IMG_FMT_YV12) ||
+                  img->bit_depth != 8) {
+                fprintf(stderr, "Cannot produce yv12 output for bit-stream.\n");
+                goto fail;
+              }
+            }
+          }
+        }
+
+        if (do_md5) {
+          update_image_md5(img, planes, &md5_ctx);
+        } else {
+          write_image_file(img, planes, outfile);
+        }
+      } else {
+        generate_filename(outfile_pattern, outfile_name, PATH_MAX, img->d_w,
+                          img->d_h, frame_in);
+        if (do_md5) {
+          MD5Init(&md5_ctx);
+          update_image_md5(img, planes, &md5_ctx);
+          MD5Final(md5_digest, &md5_ctx);
+          print_md5(md5_digest, outfile_name);
+        } else {
+          outfile = open_outfile(outfile_name);
+          write_image_file(img, planes, outfile);
+          fclose(outfile);
+        }
+      }
+    }
+  }
+
+  if (summary || progress) {
+    show_progress(frame_in, frame_out, dx_time);
+    fprintf(stderr, "\n");
+  }
+
+  if (frames_corrupted) {
+    fprintf(stderr, "WARNING: %d frames corrupted.\n", frames_corrupted);
+  } else {
+    ret = EXIT_SUCCESS;
+  }
+
+fail:
+
+  if (aom_codec_destroy(&decoder)) {
+    fprintf(stderr, "Failed to destroy decoder: %s\n",
+            aom_codec_error(&decoder));
+  }
+
+fail2:
+
+  if (!noblit && single_file) {
+    if (do_md5) {
+      MD5Final(md5_digest, &md5_ctx);
+      print_md5(md5_digest, outfile_name);
+    } else {
+      fclose(outfile);
+    }
+  }
+
+#if CONFIG_WEBM_IO
+  if (input.aom_input_ctx->file_type == FILE_TYPE_WEBM)
+    webm_free(input.webm_ctx);
+#endif
+
+  if (input.aom_input_ctx->file_type != FILE_TYPE_WEBM) free(buf);
+
+  if (scaled_img) aom_img_free(scaled_img);
+#if CONFIG_HIGHBITDEPTH
+  if (img_shifted) aom_img_free(img_shifted);
+#endif
+
+  for (i = 0; i < ext_fb_list.num_external_frame_buffers; ++i) {
+    free(ext_fb_list.ext_fb[i].data);
+  }
+  free(ext_fb_list.ext_fb);
+
+  fclose(infile);
+  if (framestats_file) fclose(framestats_file);
+
+  free(argv);
+
+  return ret;
+}
+
+int main(int argc, const char **argv_) {
+  unsigned int loops = 1, i;
+  char **argv, **argi, **argj;
+  struct arg arg;
+  int error = 0;
+
+  argv = argv_dup(argc - 1, argv_ + 1);
+  for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) {
+    memset(&arg, 0, sizeof(arg));
+    arg.argv_step = 1;
+
+    if (arg_match(&arg, &looparg, argi)) {
+      loops = arg_parse_uint(&arg);
+      break;
+    }
+  }
+  free(argv);
+  for (i = 0; !error && i < loops; i++) error = main_loop(argc, argv_);
+  return error;
+}