| /* |
| * 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; and a |
| // text file with a list of tiles to decode. |
| // After running the lightfield encoder, run lightfield decoder to decode a |
| // batch of tiles: |
| // examples/lightfield_decoder vase10x10.ivf vase_reference.yuv 4 tile_list.txt |
| // |
| // The tile_list.txt is expected to be of the form: |
| // Frame <frame_index0> |
| // <image_index0> <anchor_index0> <tile_col0> <tile_row0> |
| // <image_index1> <anchor_index1> <tile_col1> <tile_row1> |
| // ... |
| // Frame <frame_index1) |
| // ... |
| // |
| // The "Frame" markers indicate a new render frame and thus a new tile list |
| // will be started and the old one flushed. The image_indexN, anchor_indexN, |
| // tile_colN, and tile_rowN identify an individual tile to be decoded and |
| // to use anchor_indexN anchor image for MCP. |
| |
| #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> <tile_list>\n", |
| exec_name); |
| exit(EXIT_FAILURE); |
| } |
| |
| void decode_tile(aom_codec_ctx_t *codec, const unsigned char *frame, |
| size_t frame_size, int tr, int tc, int ref_idx, |
| aom_image_t *reference_images, FILE *outfile) { |
| 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); |
| } |
| |
| 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 i, j; |
| const char *tile_list_file = NULL; |
| exec_name = argv[0]; |
| |
| if (argc != 5) 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); |
| tile_list_file = argv[4]; |
| |
| 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); |
| |
| printf("Loading compressed frames into memory.\n"); |
| |
| // Count the frames in the lightfield. |
| int num_frames = 0; |
| while (aom_video_reader_read_frame(reader)) { |
| ++num_frames; |
| } |
| if (num_frames < 1) die("Input light field has no frames."); |
| |
| // Read all of the lightfield frames into memory. |
| unsigned char **frames = |
| (unsigned char **)malloc(num_frames * sizeof(unsigned char *)); |
| size_t *frame_sizes = (size_t *)malloc(num_frames * sizeof(size_t)); |
| // Seek to the first camera image. |
| fseeko(infile, camera_frame_pos, SEEK_SET); |
| for (int f = 0; f < num_frames; ++f) { |
| aom_video_reader_read_frame(reader); |
| frame = aom_video_reader_get_frame(reader, &frame_size); |
| frames[f] = (unsigned char *)malloc(frame_size * sizeof(unsigned char)); |
| memcpy(frames[f], frame, frame_size); |
| frame_sizes[f] = frame_size; |
| } |
| printf("Read %d frames.\n", num_frames); |
| |
| printf("Decoding tile list from file.\n"); |
| char line[1024]; |
| FILE *tile_list_fptr = fopen(tile_list_file, "r"); |
| while ((fgets(line, 1024, tile_list_fptr)) != NULL) { |
| if (line[0] == 'F') { |
| continue; |
| } |
| |
| int image_idx; |
| int ref_idx; |
| int tc; |
| int tr; |
| |
| sscanf(line, "%d %d %d %d", &image_idx, &ref_idx, &tc, &tr); |
| if (image_idx >= num_frames) { |
| die("Tile list image_idx out of bounds: %d >= %d.", image_idx, |
| num_frames); |
| } |
| if (ref_idx >= num_references) { |
| die("Tile list ref_idx out of bounds: %d >= %d.", ref_idx, |
| num_references); |
| } |
| frame = frames[image_idx]; |
| frame_size = frame_sizes[image_idx]; |
| decode_tile(&codec, frame, frame_size, tr, tc, ref_idx, reference_images, |
| outfile); |
| } |
| |
| for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]); |
| for (int f = 0; f < num_frames; ++f) { |
| free(frames[f]); |
| } |
| free(frame_sizes); |
| free(frames); |
| if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec"); |
| aom_video_reader_close(reader); |
| fclose(outfile); |
| |
| return EXIT_SUCCESS; |
| } |