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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;
}