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Diffstat (limited to 'third_party/aom/examples/lightfield_decoder.c')
| -rw-r--r-- | third_party/aom/examples/lightfield_decoder.c | 208 |
1 files changed, 208 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..f5e54db7f --- /dev/null +++ b/third_party/aom/examples/lightfield_decoder.c @@ -0,0 +1,208 @@ +/* + * 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; +} |