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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; and a
+// text file with a list of tiles to decode. There is an optional parameter
+// allowing to choose the output format, and the supported formats are
+// YUV1D(default), YUV, and NV12.
+// 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
+// 0(optional)
+// 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"
+
+enum {
+ YUV1D, // 1D tile output for conformance test.
+ YUV, // Tile output in YUV format.
+ NV12, // Tile output in NV12 format.
+} UENUM1BYTE(OUTPUT_FORMAT);
+
+static const char *exec_name;
+
+void usage_exit(void) {
+ fprintf(stderr,
+ "Usage: %s <infile> <outfile> <num_references> <tile_list> <output "
+ "format(optional)>\n",
+ exec_name);
+ exit(EXIT_FAILURE);
+}
+
+// Output frame size
+static const int output_frame_width = 512;
+static const int output_frame_height = 512;
+
+static void aom_img_copy_tile(const aom_image_t *src, const aom_image_t *dst,
+ int dst_row_offset, int dst_col_offset) {
+ const int shift = (src->fmt & AOM_IMG_FMT_HIGHBITDEPTH) ? 1 : 0;
+ int plane;
+
+ for (plane = 0; plane < 3; ++plane) {
+ const unsigned char *src_buf = src->planes[plane];
+ const int src_stride = src->stride[plane];
+ unsigned char *dst_buf = dst->planes[plane];
+ const int dst_stride = dst->stride[plane];
+ const int roffset =
+ (plane > 0) ? dst_row_offset >> dst->y_chroma_shift : dst_row_offset;
+ const int coffset =
+ (plane > 0) ? dst_col_offset >> dst->x_chroma_shift : dst_col_offset;
+
+ // col offset needs to be adjusted for HBD.
+ dst_buf += roffset * dst_stride + (coffset << shift);
+
+ const int w = (aom_img_plane_width(src, plane) << shift);
+ const int h = aom_img_plane_height(src, plane);
+ int y;
+
+ for (y = 0; y < h; ++y) {
+ memcpy(dst_buf, src_buf, w);
+ src_buf += src_stride;
+ dst_buf += dst_stride;
+ }
+ }
+}
+
+static 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, aom_image_t *output,
+ int *tile_idx, unsigned int *output_bit_depth,
+ aom_image_t **img_ptr, int output_format) {
+ AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1_SET_TILE_MODE, 1);
+ AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1D_EXT_TILE_DEBUG, 1);
+ AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1_SET_DECODE_TILE_ROW, tr);
+ AOM_CODEC_CONTROL_TYPECHECKED(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_TYPECHECKED(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);
+ if (!img) die_codec(codec, "Failed to get frame.");
+ *img_ptr = img;
+
+ // aom_img_alloc() sets bit_depth as follows:
+ // output->bit_depth = (fmt & AOM_IMG_FMT_HIGHBITDEPTH) ? 16 : 8;
+ // Use img->bit_depth(read from bitstream), so that aom_shift_img()
+ // works as expected.
+ output->bit_depth = img->bit_depth;
+ *output_bit_depth = img->bit_depth;
+
+ if (output_format != YUV1D) {
+ // read out the tile size.
+ unsigned int tile_size = 0;
+ if (AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1D_GET_TILE_SIZE, &tile_size))
+ die_codec(codec, "Failed to get the tile size");
+ const unsigned int tile_width = tile_size >> 16;
+ const unsigned int tile_height = tile_size & 65535;
+ const uint32_t output_frame_width_in_tiles =
+ output_frame_width / tile_width;
+
+ // Copy the tile to the output frame.
+ const int row_offset =
+ (*tile_idx / output_frame_width_in_tiles) * tile_height;
+ const int col_offset =
+ (*tile_idx % output_frame_width_in_tiles) * tile_width;
+
+ aom_img_copy_tile(img, output, row_offset, col_offset);
+ (*tile_idx)++;
+ }
+}
+
+static void img_write_to_file(const aom_image_t *img, FILE *file,
+ int output_format) {
+ if (output_format == YUV)
+ aom_img_write(img, file);
+ else if (output_format == NV12)
+ aom_img_write_nv12(img, file);
+ else
+ die("Invalid output format");
+}
+
+int main(int argc, char **argv) {
+ FILE *outfile = NULL;
+ AvxVideoReader *reader = NULL;
+ const AvxVideoInfo *info = NULL;
+ int num_references;
+ aom_img_fmt_t ref_fmt = 0;
+ aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
+ aom_image_t output;
+ aom_image_t *output_shifted = NULL;
+ size_t frame_size = 0;
+ const unsigned char *frame = NULL;
+ int i, j;
+ const char *tile_list_file = NULL;
+ int output_format = YUV1D;
+ 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];
+
+ if (argc > 5) output_format = (int)strtol(argv[5], NULL, 0);
+ if (output_format < YUV1D || output_format > NV12)
+ die("Output format out of range [0, 2]");
+
+ info = aom_video_reader_get_info(reader);
+
+ aom_codec_iface_t *decoder;
+ if (info->codec_fourcc == LST_FOURCC)
+ decoder = get_aom_decoder_by_fourcc(AV1_FOURCC);
+ else
+ die("Unknown input codec.");
+ printf("Using %s\n", aom_codec_iface_name(decoder));
+
+ aom_codec_ctx_t codec;
+ if (aom_codec_dec_init(&codec, decoder, NULL, 0))
+ die_codec(&codec, "Failed to initialize decoder.");
+
+ if (AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_SET_IS_ANNEXB,
+ info->is_annexb)) {
+ die("Failed to set annex b status");
+ }
+
+ // Decode anchor frames.
+ AOM_CODEC_CONTROL_TYPECHECKED(&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) {
+ if (AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_GET_IMG_FORMAT, &ref_fmt))
+ die_codec(&codec, "Failed to get the image format");
+
+ int frame_res[2];
+ if (AOM_CODEC_CONTROL_TYPECHECKED(&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_DEC_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_TYPECHECKED(&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, %u, %u\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));
+ if (!(frames && frame_sizes)) die("Failed to allocate frame data.");
+ // 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));
+ if (!frames[f]) die("Failed to allocate frame data.");
+ memcpy(frames[f], frame, frame_size);
+ frame_sizes[f] = frame_size;
+ }
+ printf("Read %d frames.\n", num_frames);
+
+ if (output_format != YUV1D) {
+ // Allocate the output frame.
+ aom_img_fmt_t out_fmt = ref_fmt;
+ if (FORCE_HIGHBITDEPTH_DECODING) out_fmt |= AOM_IMG_FMT_HIGHBITDEPTH;
+ if (!aom_img_alloc(&output, out_fmt, output_frame_width,
+ output_frame_height, 32))
+ die("Failed to allocate output image.");
+ }
+
+ printf("Decoding tile list from file.\n");
+ char line[1024];
+ FILE *tile_list_fptr = fopen(tile_list_file, "r");
+ if (!tile_list_fptr) die_codec(&codec, "Failed to open tile list file.");
+ int tile_list_cnt = 0;
+ int tile_list_writes = 0;
+ int tile_idx = 0;
+ aom_image_t *out = NULL;
+ unsigned int output_bit_depth = 0;
+
+ while ((fgets(line, 1024, tile_list_fptr)) != NULL) {
+ if (line[0] == 'F') {
+ if (output_format != YUV1D) {
+ // Write out the tile list.
+ if (tile_list_cnt) {
+ out = &output;
+ if (output_bit_depth != 0) {
+ if (!aom_shift_img(output_bit_depth, &out, &output_shifted)) {
+ die("Error allocating image");
+ }
+ }
+ img_write_to_file(out, outfile, output_format);
+ tile_list_writes++;
+ }
+
+ tile_list_cnt++;
+ tile_idx = 0;
+ // Then memset the frame.
+ memset(output.img_data, 0, output.sz);
+ }
+ continue;
+ }
+
+ int image_idx, ref_idx, tc, 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];
+
+ aom_image_t *img = NULL;
+ decode_tile(&codec, frame, frame_size, tr, tc, ref_idx, reference_images,
+ &output, &tile_idx, &output_bit_depth, &img, output_format);
+ if (output_format == YUV1D) {
+ out = img;
+ if (output_bit_depth != 0) {
+ if (!aom_shift_img(output_bit_depth, &out, &output_shifted)) {
+ die("Error allocating image");
+ }
+ }
+ aom_img_write(out, outfile);
+ }
+ }
+
+ if (output_format != YUV1D) {
+ // Write out the last tile list.
+ if (tile_list_writes < tile_list_cnt) {
+ out = &output;
+ if (output_bit_depth != 0) {
+ if (!aom_shift_img(output_bit_depth, &out, &output_shifted)) {
+ die("Error allocating image");
+ }
+ }
+ img_write_to_file(out, outfile, output_format);
+ }
+ }
+
+ if (output_shifted) aom_img_free(output_shifted);
+ if (output_format != YUV1D) aom_img_free(&output);
+ 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;
+}
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