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-rw-r--r-- | third_party/aom/examples/lightfield_decoder.c | 381 |
1 files changed, 381 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 0000000000..65b13efa1a --- /dev/null +++ b/third_party/aom/examples/lightfield_decoder.c @@ -0,0 +1,381 @@ +/* + * 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; +} |