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Diffstat (limited to 'third_party/aom/examples/lightfield_decoder.c')
| -rw-r--r-- | third_party/aom/examples/lightfield_decoder.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/third_party/aom/examples/lightfield_decoder.c b/third_party/aom/examples/lightfield_decoder.c new file mode 100644 index 000000000..8743df9bc --- /dev/null +++ b/third_party/aom/examples/lightfield_decoder.c @@ -0,0 +1,188 @@ +/* + * 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 webm format), treating it as a lightfield instead of a video and +// will decode a single lightfield tile. The lf_width and lf_height arguments +// are the number of lightfield images in each dimension. The tile to decode +// is specified by the tile_u, tile_v, tile_s, tile_t arguments. The tile_u, +// tile_v specify the image and tile_s, tile_t specify the tile in the image. +// After running the lightfield encoder, run lightfield decoder to decode a +// single tile: +// examples/lightfield_decoder vase10x10.webm vase_tile.yuv 10 10 3 4 5 10 5 + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "aom/aom_decoder.h" +#include "aom/aomdx.h" + +#include "../tools_common.h" +#include "../video_reader.h" +#include "./aom_config.h" + +static const char *exec_name; + +void usage_exit(void) { + fprintf(stderr, + "Usage: %s <infile> <outfile> <lf_width> <lf_height> <tlie_u>" + " <tile_v> <tile_s> <tile_t> <lf_blocksize>\n", + exec_name); + exit(EXIT_FAILURE); +} + +aom_image_t *aom_img_copy(aom_image_t *src, aom_image_t *dst) { + dst = aom_img_alloc(dst, src->fmt, src->d_w, src->d_h, 16); + + int plane; + + for (plane = 0; plane < 3; ++plane) { + uint8_t *src_buf = src->planes[plane]; + const int src_stride = src->stride[plane]; + const int src_w = plane == 0 ? src->d_w : src->d_w >> 1; + const int src_h = plane == 0 ? src->d_h : src->d_h >> 1; + + uint8_t *dst_buf = dst->planes[plane]; + const int dst_stride = dst->stride[plane]; + int y; + + for (y = 0; y < src_h; ++y) { + memcpy(dst_buf, src_buf, src_w); + src_buf += src_stride; + dst_buf += dst_stride; + } + } + return dst; +} + +int main(int argc, char **argv) { + int frame_cnt = 0; + FILE *outfile = NULL; + aom_codec_ctx_t codec; + AvxVideoReader *reader = NULL; + const AvxInterface *decoder = NULL; + const AvxVideoInfo *info = NULL; + const char *lf_width_arg; + const char *lf_height_arg; + const char *tile_u_arg; + const char *tile_v_arg; + const char *tile_s_arg; + const char *tile_t_arg; + const char *lf_blocksize_arg; + int lf_width, lf_height; + int tile_u, tile_v, tile_s, tile_t; + int lf_blocksize; + int u_blocks; + int v_blocks; + + exec_name = argv[0]; + + if (argc != 10) 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]); + + lf_width_arg = argv[3]; + lf_height_arg = argv[4]; + tile_u_arg = argv[5]; + tile_v_arg = argv[6]; + tile_s_arg = argv[7]; + tile_t_arg = argv[8]; + lf_blocksize_arg = argv[9]; + lf_width = (int)strtol(lf_width_arg, NULL, 0); + lf_height = (int)strtol(lf_height_arg, NULL, 0); + tile_u = (int)strtol(tile_u_arg, NULL, 0); + tile_v = (int)strtol(tile_v_arg, NULL, 0); + tile_s = (int)strtol(tile_s_arg, NULL, 0); + tile_t = (int)strtol(tile_t_arg, NULL, 0); + lf_blocksize = (int)strtol(lf_blocksize_arg, 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."); + + // How many reference images we need to encode. + u_blocks = (lf_width + lf_blocksize - 1) / lf_blocksize; + v_blocks = (lf_height + lf_blocksize - 1) / lf_blocksize; + aom_image_t *reference_images = + (aom_image_t *)malloc(u_blocks * v_blocks * sizeof(aom_image_t)); + for (int bv = 0; bv < v_blocks; ++bv) { + for (int bu = 0; bu < u_blocks; ++bu) { + aom_video_reader_read_frame(reader); + aom_codec_iter_t iter = NULL; + aom_image_t *img = NULL; + size_t frame_size = 0; + const unsigned char *frame = + aom_video_reader_get_frame(reader, &frame_size); + if (aom_codec_decode(&codec, frame, (unsigned int)frame_size, NULL, 0)) + die_codec(&codec, "Failed to decode frame."); + + while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) { + aom_img_copy(img, &reference_images[bu + bv * u_blocks]); + char name[1024]; + snprintf(name, sizeof(name), "ref_%d_%d.yuv", bu, bv); + 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); + ++frame_cnt; + } + } + } + + int decode_frame_index = tile_v * lf_width + tile_u; + do { + aom_video_reader_read_frame(reader); + } while (frame_cnt++ != decode_frame_index); + size_t frame_size = 0; + const unsigned char *frame = aom_video_reader_get_frame(reader, &frame_size); + + int ref_bu = tile_u / lf_blocksize; + int ref_bv = tile_v / lf_blocksize; + int ref_bi = ref_bu + ref_bv * u_blocks; + av1_ref_frame_t ref; + ref.idx = 0; + ref.img = reference_images[ref_bi]; + // This is too slow for real lightfield rendering. This copies the + // reference image bytes. We need a way to just set a pointer + // in order to make this fast enough. + if (aom_codec_control(&codec, AV1_SET_REFERENCE, &ref)) { + die_codec(&codec, "Failed to set reference image."); + } + aom_codec_control_(&codec, AV1_SET_DECODE_TILE_ROW, tile_t); + aom_codec_control_(&codec, AV1_SET_DECODE_TILE_COL, tile_s); + aom_codec_err_t aom_status = + aom_codec_decode(&codec, frame, frame_size, NULL, 0); + 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); + + if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec"); + aom_video_reader_close(reader); + fclose(outfile); + + return EXIT_SUCCESS; +} |