examples/lightfield_decoder.c

   1 /*
   2  * Copyright (c) 2017, Alliance for Open Media. All rights reserved
   3  *
   4  * This source code is subject to the terms of the BSD 2 Clause License and
   5  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   6  * was not distributed with this source code in the LICENSE file, you can
   7  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   8  * Media Patent License 1.0 was not distributed with this source code in the
   9  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  10  */
  11
  12 // Lightfield Decoder
  13 // ==================
  14 //
  15 // This is an example of a simple lightfield decoder. It builds upon the
  16 // simple_decoder.c example.  It takes an input file containing the compressed
  17 // data (in ivf format), treating it as a lightfield instead of a video and
  18 // will decode a single lightfield tile. The lf_width and lf_height arguments
  19 // are the number of lightfield images in each dimension. The tile to decode
  20 // is specified by the tile_u, tile_v, tile_s, tile_t arguments. The tile_u,
  21 // tile_v specify the image and tile_s, tile_t specify the tile in the image.
  22 // After running the lightfield encoder, run lightfield decoder to decode a
  23 // single tile:
  24 // examples/lightfield_decoder vase10x10.ivf vase_tile.yuv 10 10 3 4 5 10 5
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "aom/aom_decoder.h"
  31 #include "aom/aomdx.h"
  32 #include "common/tools_common.h"
  33 #include "common/video_reader.h"
  34
  35 #define MAX_EXTERNAL_REFERENCES 128
  36 #define AOM_BORDER_IN_PIXELS 288
  37
  38 static const char *exec_name;
  39
  40 void usage_exit(void) {
  41   fprintf(stderr,
  42           "Usage: %s <infile> <outfile> <lf_width> <lf_height> <tlie_u>"
  43           " <tile_v> <tile_s> <tile_t> <lf_blocksize>\n",
  44           exec_name);
  45   exit(EXIT_FAILURE);
  46 }
  47
  48 int main(int argc, char **argv) {
  49   FILE *outfile = NULL;
  50   aom_codec_ctx_t codec;
  51   AvxVideoReader *reader = NULL;
  52   const AvxInterface *decoder = NULL;
  53   const AvxVideoInfo *info = NULL;
  54   const char *lf_width_arg;
  55   const char *lf_height_arg;
  56   const char *tile_u_arg;
  57   const char *tile_v_arg;
  58   const char *tile_s_arg;
  59   const char *tile_t_arg;
  60   const char *lf_blocksize_arg;
  61   int width, height;
  62   int lf_width, lf_height;
  63   int tile_u, tile_v, tile_s, tile_t;
  64   int lf_blocksize;
  65   int u_blocks;
  66   int v_blocks;
  67   aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
  68   size_t frame_size = 0;
  69   const unsigned char *frame = NULL;
  70   int i;
  71
  72   exec_name = argv[0];
  73
  74   if (argc != 10) die("Invalid number of arguments.");
  75
  76   reader = aom_video_reader_open(argv[1]);
  77   if (!reader) die("Failed to open %s for reading.", argv[1]);
  78
  79   if (!(outfile = fopen(argv[2], "wb")))
  80     die("Failed to open %s for writing.", argv[2]);
  81
  82   lf_width_arg = argv[3];
  83   lf_height_arg = argv[4];
  84   tile_u_arg = argv[5];
  85   tile_v_arg = argv[6];
  86   tile_s_arg = argv[7];
  87   tile_t_arg = argv[8];
  88   lf_blocksize_arg = argv[9];
  89   lf_width = (int)strtol(lf_width_arg, NULL, 0);
  90   lf_height = (int)strtol(lf_height_arg, NULL, 0);
  91   tile_u = (int)strtol(tile_u_arg, NULL, 0);
  92   tile_v = (int)strtol(tile_v_arg, NULL, 0);
  93   tile_s = (int)strtol(tile_s_arg, NULL, 0);
  94   tile_t = (int)strtol(tile_t_arg, NULL, 0);
  95   lf_blocksize = (int)strtol(lf_blocksize_arg, NULL, 0);
  96
  97   info = aom_video_reader_get_info(reader);
  98   width = info->frame_width;
  99   height = info->frame_height;
 100
 101   decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
 102   if (!decoder) die("Unknown input codec.");
 103   printf("Using %s\n", aom_codec_iface_name(decoder->codec_interface()));
 104
 105   if (aom_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
 106     die_codec(&codec, "Failed to initialize decoder.");
 107
 108   // How many anchor frames we have.
 109   u_blocks = (lf_width + lf_blocksize - 1) / lf_blocksize;
 110   v_blocks = (lf_height + lf_blocksize - 1) / lf_blocksize;
 111
 112   int num_references = v_blocks * u_blocks;
 113   int frame_count = 0;
 114
 115   // Allocate memory to store decoded references.
 116   aom_img_fmt_t ref_fmt = AOM_IMG_FMT_I420;
 117   if (!CONFIG_LOWBITDEPTH) ref_fmt |= AOM_IMG_FMT_HIGHBITDEPTH;
 118   // Allocate memory with the border so that it can be used as a reference.
 119   for (i = 0; i < num_references; i++) {
 120     unsigned int border = AOM_BORDER_IN_PIXELS;
 121     if (!aom_img_alloc_with_border(&reference_images[i], ref_fmt, width, height,
 122                                    32, 8, border)) {
 123       die("Failed to allocate references.");
 124     }
 125   }
 126
 127   // Decode anchor frames.
 128   aom_codec_control_(&codec, AV1_SET_TILE_MODE, 0);
 129
 130   for (i = 0; i < num_references; ++i) {
 131     aom_video_reader_read_frame(reader);
 132     frame = aom_video_reader_get_frame(reader, &frame_size);
 133     if (aom_codec_decode(&codec, frame, frame_size, NULL))
 134       die_codec(&codec, "Failed to decode frame.");
 135
 136     if (aom_codec_control(&codec, AV1_COPY_NEW_FRAME_IMAGE,
 137                           &reference_images[i]))
 138       die_codec(&codec, "Failed to copy decoded reference frame");
 139
 140     aom_codec_iter_t iter = NULL;
 141     aom_image_t *img = NULL;
 142     while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) {
 143       char name[1024];
 144       snprintf(name, sizeof(name), "ref_%d.yuv", i);
 145       printf("writing ref image to %s, %d, %d\n", name, img->d_w, img->d_h);
 146       FILE *ref_file = fopen(name, "wb");
 147       aom_img_write(img, ref_file);
 148       fclose(ref_file);
 149     }
 150   }
 151
 152   frame_count = 0;
 153   int decode_frame_index = tile_v * lf_width + tile_u;
 154   do {
 155     aom_video_reader_read_frame(reader);
 156   } while (frame_count++ != decode_frame_index);
 157
 158   frame = aom_video_reader_get_frame(reader, &frame_size);
 159   int ref_bu = tile_u / lf_blocksize;
 160   int ref_bv = tile_v / lf_blocksize;
 161   int ref_bi = ref_bu + ref_bv * u_blocks;
 162   av1_ref_frame_t ref;
 163   ref.idx = 0;
 164   ref.use_external_ref = 1;
 165   ref.img = reference_images[ref_bi];
 166
 167   if (aom_codec_control(&codec, AV1_SET_REFERENCE, &ref)) {
 168     die_codec(&codec, "Failed to set reference frame.");
 169   }
 170   aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1);
 171   aom_codec_control_(&codec, AV1_SET_DECODE_TILE_ROW, tile_t);
 172   aom_codec_control_(&codec, AV1_SET_DECODE_TILE_COL, tile_s);
 173   aom_codec_control_(&codec, AV1D_EXT_TILE_DEBUG, 1);
 174   aom_codec_err_t aom_status =
 175       aom_codec_decode(&codec, frame, frame_size, NULL);
 176   if (aom_status) die_codec(&codec, "Failed to decode tile.");
 177   aom_codec_iter_t iter = NULL;
 178   aom_image_t *img = aom_codec_get_frame(&codec, &iter);
 179   aom_img_write(img, outfile);
 180
 181   for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]);
 182   if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
 183   aom_video_reader_close(reader);
 184   fclose(outfile);
 185
 186   return EXIT_SUCCESS;
 187 }