diff options
Diffstat (limited to 'media/libaom/src/examples/lightfield_tile_list_decoder.c')
| -rw-r--r-- | media/libaom/src/examples/lightfield_tile_list_decoder.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/media/libaom/src/examples/lightfield_tile_list_decoder.c b/media/libaom/src/examples/lightfield_tile_list_decoder.c new file mode 100644 index 000000000..5556bf0e7 --- /dev/null +++ b/media/libaom/src/examples/lightfield_tile_list_decoder.c @@ -0,0 +1,161 @@ +/* + * Copyright (c) 2018, 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 Tile List Decoder +// ============================ +// +// This is a lightfield tile list decoder example. It takes an input file that +// contains the anchor frames that are references of the coded tiles, the camera +// frame header, and tile list OBUs that include the tile information and the +// compressed tile data. This input file is reconstructed from the encoded +// lightfield ivf file, and is decodable by AV1 decoder. num_references is +// the number of anchor frames coded at the beginning of the light field file. +// num_tile_lists is the number of tile lists need to be decoded. +// Run lightfield tile list decoder to decode an AV1 tile list file: +// examples/lightfield_tile_list_decoder vase_tile_list.ivf vase_tile_list.yuv +// 4 2 + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.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> <num_tile_lists>\n", + exec_name); + exit(EXIT_FAILURE); +} + +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; + int num_tile_lists; + aom_image_t reference_images[MAX_EXTERNAL_REFERENCES]; + size_t frame_size = 0; + const unsigned char *frame = NULL; + int i, j, n; + + 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); + num_tile_lists = (int)strtol(argv[4], 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); + } + } + + // Decode the lightfield. + aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1); + + // Set external references. + av1_ext_ref_frame_t set_ext_ref = { &reference_images[0], num_references }; + aom_codec_control_(&codec, AV1D_SET_EXT_REF_PTR, &set_ext_ref); + // Must decode the camera frame header first. + 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 the frame."); + // Decode tile lists one by one. + for (n = 0; n < num_tile_lists; n++) { + 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 the tile list."); + aom_codec_iter_t iter = NULL; + aom_image_t *img; + while ((img = aom_codec_get_frame(&codec, &iter))) + fwrite(img->img_data, 1, img->sz, 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; +} |