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+/*
+ * Copyright (c) 2017, 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.
+ */
+
+// Lightfield Decoder
+// ==================
+//
+// This is an example of a simple lightfield decoder. It builds upon the
+// simple_decoder.c example. It takes an input file containing the compressed
+// data (in ivf format), treating it as a lightfield instead of a video.
+// After running the lightfield encoder, run lightfield decoder to decode a
+// batch of tiles:
+// examples/lightfield_decoder vase10x10.ivf vase_reference.yuv 4
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "aom/aom_decoder.h"
+#include "aom/aomdx.h"
+#include "aom_scale/yv12config.h"
+#include "av1/common/enums.h"
+#include "common/tools_common.h"
+#include "common/video_reader.h"
+
+static const char *exec_name;
+
+void usage_exit(void) {
+ fprintf(stderr, "Usage: %s <infile> <outfile> <num_references>\n", exec_name);
+ exit(EXIT_FAILURE);
+}
+
+// Tile list entry provided by the application
+typedef struct {
+ int image_idx;
+ int reference_idx;
+ int tile_col;
+ int tile_row;
+} TILE_LIST_INFO;
+
+// M references: 0 - M-1; N images(including references): 0 - N-1;
+// Note: order the image index incrementally, so that we only go through the
+// bitstream once to construct the tile list.
+const int num_tile_lists = 2;
+const uint16_t tile_count_minus_1 = 9 - 1;
+const TILE_LIST_INFO tile_list[2][9] = {
+ { { 16, 0, 4, 5 },
+ { 83, 3, 13, 2 },
+ { 57, 2, 2, 6 },
+ { 31, 1, 11, 5 },
+ { 2, 0, 7, 4 },
+ { 77, 3, 9, 9 },
+ { 49, 1, 0, 1 },
+ { 6, 0, 3, 10 },
+ { 63, 2, 5, 8 } },
+ { { 65, 2, 11, 1 },
+ { 42, 1, 3, 7 },
+ { 88, 3, 8, 4 },
+ { 76, 3, 1, 15 },
+ { 1, 0, 2, 2 },
+ { 19, 0, 5, 6 },
+ { 60, 2, 4, 0 },
+ { 25, 1, 11, 15 },
+ { 50, 2, 5, 4 } },
+};
+
+int main(int argc, char **argv) {
+ FILE *outfile = NULL;
+ aom_codec_ctx_t codec;
+ AvxVideoReader *reader = NULL;
+ const AvxInterface *decoder = NULL;
+ const AvxVideoInfo *info = NULL;
+ int num_references;
+ aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
+ size_t frame_size = 0;
+ const unsigned char *frame = NULL;
+ int n, i, j;
+ exec_name = argv[0];
+
+ if (argc != 4) die("Invalid number of arguments.");
+
+ reader = aom_video_reader_open(argv[1]);
+ if (!reader) die("Failed to open %s for reading.", argv[1]);
+
+ if (!(outfile = fopen(argv[2], "wb")))
+ die("Failed to open %s for writing.", argv[2]);
+
+ num_references = (int)strtol(argv[3], NULL, 0);
+
+ info = aom_video_reader_get_info(reader);
+
+ decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
+ if (!decoder) die("Unknown input codec.");
+ printf("Using %s\n", aom_codec_iface_name(decoder->codec_interface()));
+
+ if (aom_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
+ die_codec(&codec, "Failed to initialize decoder.");
+
+ if (aom_codec_control(&codec, AV1D_SET_IS_ANNEXB, info->is_annexb)) {
+ die("Failed to set annex b status");
+ }
+
+ // Decode anchor frames.
+ aom_codec_control_(&codec, AV1_SET_TILE_MODE, 0);
+ for (i = 0; i < num_references; ++i) {
+ aom_video_reader_read_frame(reader);
+ frame = aom_video_reader_get_frame(reader, &frame_size);
+ if (aom_codec_decode(&codec, frame, frame_size, NULL))
+ die_codec(&codec, "Failed to decode frame.");
+
+ if (i == 0) {
+ aom_img_fmt_t ref_fmt = 0;
+ if (aom_codec_control(&codec, AV1D_GET_IMG_FORMAT, &ref_fmt))
+ die_codec(&codec, "Failed to get the image format");
+
+ int frame_res[2];
+ if (aom_codec_control(&codec, AV1D_GET_FRAME_SIZE, frame_res))
+ die_codec(&codec, "Failed to get the image frame size");
+
+ // Allocate memory to store decoded references. Allocate memory with the
+ // border so that it can be used as a reference.
+ for (j = 0; j < num_references; j++) {
+ unsigned int border = AOM_BORDER_IN_PIXELS;
+ if (!aom_img_alloc_with_border(&reference_images[j], ref_fmt,
+ frame_res[0], frame_res[1], 32, 8,
+ border)) {
+ die("Failed to allocate references.");
+ }
+ }
+ }
+
+ if (aom_codec_control(&codec, AV1_COPY_NEW_FRAME_IMAGE,
+ &reference_images[i]))
+ die_codec(&codec, "Failed to copy decoded reference frame");
+
+ aom_codec_iter_t iter = NULL;
+ aom_image_t *img = NULL;
+ while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) {
+ char name[1024];
+ snprintf(name, sizeof(name), "ref_%d.yuv", i);
+ printf("writing ref image to %s, %d, %d\n", name, img->d_w, img->d_h);
+ FILE *ref_file = fopen(name, "wb");
+ aom_img_write(img, ref_file);
+ fclose(ref_file);
+ }
+ }
+
+ FILE *infile = aom_video_reader_get_file(reader);
+ // Record the offset of the first camera image.
+ const FileOffset camera_frame_pos = ftello(infile);
+
+ // Process 1 tile.
+ for (n = 0; n < num_tile_lists; n++) {
+ for (i = 0; i <= tile_count_minus_1; i++) {
+ int image_idx = tile_list[n][i].image_idx;
+ int ref_idx = tile_list[n][i].reference_idx;
+ int tc = tile_list[n][i].tile_col;
+ int tr = tile_list[n][i].tile_row;
+ int frame_cnt = -1;
+
+ // Seek to the first camera image.
+ fseeko(infile, camera_frame_pos, SEEK_SET);
+
+ // Read out the camera image
+ while (frame_cnt != image_idx) {
+ aom_video_reader_read_frame(reader);
+ frame_cnt++;
+ }
+
+ frame = aom_video_reader_get_frame(reader, &frame_size);
+
+ aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1);
+ aom_codec_control_(&codec, AV1D_EXT_TILE_DEBUG, 1);
+ aom_codec_control_(&codec, AV1_SET_DECODE_TILE_ROW, tr);
+ aom_codec_control_(&codec, AV1_SET_DECODE_TILE_COL, tc);
+
+ av1_ref_frame_t ref;
+ ref.idx = 0;
+ ref.use_external_ref = 1;
+ ref.img = reference_images[ref_idx];
+ if (aom_codec_control(&codec, AV1_SET_REFERENCE, &ref)) {
+ die_codec(&codec, "Failed to set reference frame.");
+ }
+
+ aom_codec_err_t aom_status =
+ aom_codec_decode(&codec, frame, frame_size, NULL);
+ if (aom_status) die_codec(&codec, "Failed to decode tile.");
+
+ aom_codec_iter_t iter = NULL;
+ aom_image_t *img = aom_codec_get_frame(&codec, &iter);
+ aom_img_write(img, outfile);
+ }
+ }
+
+ for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]);
+ if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
+ aom_video_reader_close(reader);
+ fclose(outfile);
+
+ return EXIT_SUCCESS;
+}