| /* |
| * Copyright (c) 2018, 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 Bitstream Parsing |
| // ============================ |
| // |
| // This is a lightfield bitstream parsing example. It takes an input file |
| // containing the whole compressed lightfield bitstream(ivf file) and a text |
| // file containing a stream of tiles to decode and then constructs and outputs |
| // a new bitstream that can be decoded by an AV1 decoder. The output bitstream |
| // contains reference frames(i.e. anchor frames), camera frame header, and |
| // tile list OBUs. num_references is the number of anchor frames coded at the |
| // beginning of the light field file. After running the lightfield encoder, |
| // run lightfield bitstream parsing: |
| // examples/lightfield_bitstream_parsing vase10x10.ivf vase_tile_list.ivf 4 |
| // tile_list.txt |
| // |
| // 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/aom_encoder.h" |
| #include "aom/aom_integer.h" |
| #include "aom/aomdx.h" |
| #include "aom_dsp/bitwriter_buffer.h" |
| #include "common/tools_common.h" |
| #include "common/video_reader.h" |
| #include "common/video_writer.h" |
| |
| #define MAX_TILES 512 |
| |
| static const char *exec_name; |
| |
| void usage_exit(void) { |
| fprintf(stderr, "Usage: %s <infile> <outfile> <num_references> <tile_list>\n", |
| exec_name); |
| exit(EXIT_FAILURE); |
| } |
| |
| #define ALIGN_POWER_OF_TWO(value, n) \ |
| (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1)) |
| |
| const int output_frame_width = 512; |
| const int output_frame_height = 512; |
| |
| // Spec: |
| // typedef struct { |
| // uint8_t anchor_frame_idx; |
| // uint8_t tile_row; |
| // uint8_t tile_col; |
| // uint16_t coded_tile_data_size_minus_1; |
| // uint8_t *coded_tile_data; |
| // } TILE_LIST_ENTRY; |
| |
| // Tile list entry provided by the application |
| typedef struct { |
| int image_idx; |
| int reference_idx; |
| int tile_col; |
| int tile_row; |
| } TILE_LIST_INFO; |
| |
| static int get_image_bps(aom_img_fmt_t fmt) { |
| switch (fmt) { |
| case AOM_IMG_FMT_I420: return 12; |
| case AOM_IMG_FMT_I422: return 16; |
| case AOM_IMG_FMT_I444: return 24; |
| case AOM_IMG_FMT_I42016: return 24; |
| case AOM_IMG_FMT_I42216: return 32; |
| case AOM_IMG_FMT_I44416: return 48; |
| default: die("Invalid image format"); |
| } |
| } |
| |
| static void process_tile_list(const TILE_LIST_INFO *tiles, int num_tiles, |
| aom_codec_pts_t tl_pts, unsigned char **frames, |
| const size_t *frame_sizes, aom_codec_ctx_t *codec, |
| unsigned char *tl_buf, AvxVideoWriter *writer, |
| uint8_t output_frame_width_in_tiles_minus_1, |
| uint8_t output_frame_height_in_tiles_minus_1) { |
| unsigned char *tl = tl_buf; |
| struct aom_write_bit_buffer wb = { tl, 0 }; |
| unsigned char *saved_obu_size_loc = NULL; |
| uint32_t tile_list_obu_header_size = 0; |
| uint32_t tile_list_obu_size = 0; |
| int num_tiles_minus_1 = num_tiles - 1; |
| int i; |
| |
| // Write the tile list OBU header that is 1 byte long. |
| aom_wb_write_literal(&wb, 0, 1); // forbidden bit. |
| aom_wb_write_literal(&wb, 8, 4); // tile list OBU: "1000" |
| aom_wb_write_literal(&wb, 0, 1); // obu_extension = 0 |
| aom_wb_write_literal(&wb, 1, 1); // obu_has_size_field |
| aom_wb_write_literal(&wb, 0, 1); // reserved |
| tl++; |
| tile_list_obu_header_size++; |
| |
| // Write the OBU size using a fixed length_field_size of 4 bytes. |
| saved_obu_size_loc = tl; |
| // aom_wb_write_unsigned_literal(&wb, data, bits) requires that bits <= 32. |
| aom_wb_write_unsigned_literal(&wb, 0, 32); |
| tl += 4; |
| tile_list_obu_header_size += 4; |
| |
| // write_tile_list_obu() |
| aom_wb_write_literal(&wb, output_frame_width_in_tiles_minus_1, 8); |
| aom_wb_write_literal(&wb, output_frame_height_in_tiles_minus_1, 8); |
| aom_wb_write_literal(&wb, num_tiles_minus_1, 16); |
| tl += 4; |
| tile_list_obu_size += 4; |
| |
| // Write each tile's data |
| for (i = 0; i <= num_tiles_minus_1; i++) { |
| aom_tile_data tile_data = { 0, NULL, 0 }; |
| |
| int image_idx = tiles[i].image_idx; |
| int ref_idx = tiles[i].reference_idx; |
| int tc = tiles[i].tile_col; |
| int tr = tiles[i].tile_row; |
| |
| // Reset bit writer to the right location. |
| wb.bit_buffer = tl; |
| wb.bit_offset = 0; |
| |
| size_t frame_size = frame_sizes[image_idx]; |
| const unsigned char *frame = frames[image_idx]; |
| |
| AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1_SET_DECODE_TILE_ROW, tr); |
| AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1_SET_DECODE_TILE_COL, tc); |
| |
| 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_CONTROL_TYPECHECKED(codec, AV1D_GET_TILE_DATA, &tile_data); |
| |
| // Copy over tile info. |
| // uint8_t anchor_frame_idx; |
| // uint8_t tile_row; |
| // uint8_t tile_col; |
| // uint16_t coded_tile_data_size_minus_1; |
| // uint8_t *coded_tile_data; |
| uint32_t tile_info_bytes = 5; |
| aom_wb_write_literal(&wb, ref_idx, 8); |
| aom_wb_write_literal(&wb, tr, 8); |
| aom_wb_write_literal(&wb, tc, 8); |
| aom_wb_write_literal(&wb, (int)tile_data.coded_tile_data_size - 1, 16); |
| tl += tile_info_bytes; |
| |
| memcpy(tl, (uint8_t *)tile_data.coded_tile_data, |
| tile_data.coded_tile_data_size); |
| tl += tile_data.coded_tile_data_size; |
| |
| tile_list_obu_size += |
| tile_info_bytes + (uint32_t)tile_data.coded_tile_data_size; |
| } |
| |
| // Write tile list OBU size. |
| size_t bytes_written = 0; |
| if (aom_uleb_encode_fixed_size(tile_list_obu_size, 4, 4, saved_obu_size_loc, |
| &bytes_written)) |
| die_codec(codec, "Failed to encode the tile list obu size."); |
| |
| // Copy the tile list. |
| if (!aom_video_writer_write_frame( |
| writer, tl_buf, tile_list_obu_header_size + tile_list_obu_size, |
| tl_pts)) |
| die_codec(codec, "Failed to copy compressed tile list."); |
| } |
| |
| int main(int argc, char **argv) { |
| AvxVideoReader *reader = NULL; |
| AvxVideoWriter *writer = NULL; |
| const AvxVideoInfo *info = NULL; |
| int num_references; |
| int i; |
| aom_codec_pts_t pts; |
| const char *tile_list_file = NULL; |
| |
| 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]); |
| |
| num_references = (int)strtol(argv[3], NULL, 0); |
| info = aom_video_reader_get_info(reader); |
| |
| aom_video_reader_set_fourcc(reader, AV1_FOURCC); |
| |
| // The writer to write out ivf file in tile list OBU, which can be decoded by |
| // AV1 decoder. |
| writer = aom_video_writer_open(argv[2], kContainerIVF, info); |
| if (!writer) die("Failed to open %s for writing", argv[2]); |
| |
| tile_list_file = argv[4]; |
| |
| aom_codec_iface_t *decoder = get_aom_decoder_by_fourcc(info->codec_fourcc); |
| if (!decoder) 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("Failed to initialize decoder."); |
| |
| // Decode anchor frames. |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_TILE_MODE, 0); |
| |
| printf("Reading %d reference images.\n", num_references); |
| for (i = 0; i < num_references; ++i) { |
| aom_video_reader_read_frame(reader); |
| |
| size_t frame_size = 0; |
| const unsigned char *frame = |
| aom_video_reader_get_frame(reader, &frame_size); |
| pts = (aom_codec_pts_t)aom_video_reader_get_frame_pts(reader); |
| |
| // Copy references bitstream directly. |
| if (!aom_video_writer_write_frame(writer, frame, frame_size, pts)) |
| die_codec(&codec, "Failed to copy compressed anchor frame."); |
| |
| if (aom_codec_decode(&codec, frame, frame_size, NULL)) |
| die_codec(&codec, "Failed to decode frame."); |
| } |
| |
| // Decode camera frames. |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_TILE_MODE, 1); |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_EXT_TILE_DEBUG, 1); |
| |
| 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); |
| size_t frame_size = 0; |
| const unsigned char *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); |
| |
| // Copy first camera frame for getting camera frame header. This is done |
| // only once. |
| { |
| size_t frame_size = frame_sizes[0]; |
| const unsigned char *frame = frames[0]; |
| pts = num_references; |
| aom_tile_data frame_header_info = { 0, NULL, 0 }; |
| |
| // Need to decode frame header to get camera frame header info. So, here |
| // decoding 1 tile is enough. |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_DECODE_TILE_ROW, 0); |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_DECODE_TILE_COL, 0); |
| |
| 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_CONTROL_TYPECHECKED(&codec, AV1D_GET_FRAME_HEADER_INFO, |
| &frame_header_info); |
| |
| size_t obu_size_offset = |
| (uint8_t *)frame_header_info.coded_tile_data - frame; |
| size_t length_field_size = frame_header_info.coded_tile_data_size; |
| // Remove ext-tile tile info. |
| uint32_t frame_header_size = (uint32_t)frame_header_info.extra_size - 1; |
| size_t bytes_to_copy = |
| obu_size_offset + length_field_size + frame_header_size; |
| |
| unsigned char *frame_hdr_buf = (unsigned char *)malloc(bytes_to_copy); |
| if (frame_hdr_buf == NULL) |
| die_codec(&codec, "Failed to allocate frame header buffer."); |
| |
| memcpy(frame_hdr_buf, frame, bytes_to_copy); |
| |
| // Update frame header OBU size. |
| size_t bytes_written = 0; |
| if (aom_uleb_encode_fixed_size( |
| frame_header_size, length_field_size, length_field_size, |
| frame_hdr_buf + obu_size_offset, &bytes_written)) |
| die_codec(&codec, "Failed to encode the tile list obu size."); |
| |
| // Copy camera frame header bitstream. |
| if (!aom_video_writer_write_frame(writer, frame_hdr_buf, bytes_to_copy, |
| pts)) |
| die_codec(&codec, "Failed to copy compressed camera frame header."); |
| free(frame_hdr_buf); |
| } |
| |
| // Read out the image format. |
| aom_img_fmt_t ref_fmt = 0; |
| if (AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_GET_IMG_FORMAT, &ref_fmt)) |
| die_codec(&codec, "Failed to get the image format"); |
| const int bps = get_image_bps(ref_fmt); |
| if (!bps) die_codec(&codec, "Invalid image format."); |
| // 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; |
| // Allocate a buffer to store tile list bitstream. |
| const size_t data_sz = MAX_TILES * ALIGN_POWER_OF_TWO(tile_width, 5) * |
| ALIGN_POWER_OF_TWO(tile_height, 5) * bps / 8; |
| |
| unsigned char *tl_buf = (unsigned char *)malloc(data_sz); |
| if (tl_buf == NULL) die_codec(&codec, "Failed to allocate tile list buffer."); |
| |
| aom_codec_pts_t tl_pts = num_references; |
| const uint8_t output_frame_width_in_tiles_minus_1 = |
| output_frame_width / tile_width - 1; |
| const uint8_t output_frame_height_in_tiles_minus_1 = |
| output_frame_height / tile_height - 1; |
| |
| printf("Reading 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 num_tiles = 0; |
| TILE_LIST_INFO tiles[MAX_TILES]; |
| while ((fgets(line, 1024, tile_list_fptr)) != NULL) { |
| if (line[0] == 'F' || num_tiles >= MAX_TILES) { |
| // Flush existing tile list and start another, either because we hit a |
| // new render frame or because we've hit our max number of tiles per list. |
| if (num_tiles > 0) { |
| process_tile_list(tiles, num_tiles, tl_pts, frames, frame_sizes, &codec, |
| tl_buf, writer, output_frame_width_in_tiles_minus_1, |
| output_frame_height_in_tiles_minus_1); |
| ++tl_pts; |
| } |
| num_tiles = 0; |
| } |
| if (line[0] == 'F') { |
| continue; |
| } |
| if (sscanf(line, "%d %d %d %d", &tiles[num_tiles].image_idx, |
| &tiles[num_tiles].reference_idx, &tiles[num_tiles].tile_col, |
| &tiles[num_tiles].tile_row) == 4) { |
| if (tiles[num_tiles].image_idx >= num_frames) { |
| die("Tile list image_idx out of bounds: %d >= %d.", |
| tiles[num_tiles].image_idx, num_frames); |
| } |
| if (tiles[num_tiles].reference_idx >= num_references) { |
| die("Tile list reference_idx out of bounds: %d >= %d.", |
| tiles[num_tiles].reference_idx, num_references); |
| } |
| ++num_tiles; |
| } |
| } |
| if (num_tiles > 0) { |
| // Flush out the last tile list. |
| process_tile_list(tiles, num_tiles, tl_pts, frames, frame_sizes, &codec, |
| tl_buf, writer, output_frame_width_in_tiles_minus_1, |
| output_frame_height_in_tiles_minus_1); |
| ++tl_pts; |
| } |
| |
| const int num_tile_lists = (int)(tl_pts - pts); |
| printf("Finished processing tile lists. Num tile lists: %d.\n", |
| num_tile_lists); |
| free(tl_buf); |
| 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_writer_close(writer); |
| aom_video_reader_close(reader); |
| |
| return EXIT_SUCCESS; |
| } |