/* * 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 Encoder // ================== // // This is an example of a simple lightfield encoder. It builds upon the // twopass_encoder.c example. It takes an input file in YV12 format, // treating it as a planar lightfield instead of a video. The img_width // and img_height arguments are the dimensions of the lightfield images, // while the lf_width and lf_height arguments are the number of // lightfield images in each dimension. The lf_blocksize determines the // number of reference images used for MCP. For example, 5 means that there // is a reference image for every 5x5 lightfield image block. All images // within a block will use the center image in that block as the reference // image for MCP. // Run "make test" to download lightfield test data: vase10x10.yuv. // Run lightfield encoder to encode whole lightfield: // examples/lightfield_encoder 1024 1024 vase10x10.yuv vase10x10.ivf 10 10 5 // Note: In bitstream.c and encoder.c, define EXT_TILE_DEBUG as 1 will print // out the uncompressed header and the frame contexts, which can be used to // test the bit exactness of the headers and the frame contexts for large scale // tile coded frames. #include <stdio.h> #include <stdlib.h> #include <string.h> #include "aom/aom_encoder.h" #include "aom/aomcx.h" #include "aom_scale/yv12config.h" #include "av1/common/enums.h" #include "common/tools_common.h" #include "common/video_writer.h" static const char *exec_name; void usage_exit(void) { fprintf(stderr, "Usage: %s <img_width> <img_height> <infile> <outfile> " "<lf_width> <lf_height> <lf_blocksize>\n", exec_name); exit(EXIT_FAILURE); } static int aom_img_size_bytes(aom_image_t *img) { int image_size_bytes = 0; int plane; for (plane = 0; plane < 3; ++plane) { const int w = aom_img_plane_width(img, plane) * ((img->fmt & AOM_IMG_FMT_HIGHBITDEPTH) ? 2 : 1); const int h = aom_img_plane_height(img, plane); image_size_bytes += w * h; } return image_size_bytes; } static int get_frame_stats(aom_codec_ctx_t *ctx, const aom_image_t *img, aom_codec_pts_t pts, unsigned int duration, aom_enc_frame_flags_t flags, aom_fixed_buf_t *stats) { int got_pkts = 0; aom_codec_iter_t iter = NULL; const aom_codec_cx_pkt_t *pkt = NULL; const aom_codec_err_t res = aom_codec_encode(ctx, img, pts, duration, flags); if (res != AOM_CODEC_OK) die_codec(ctx, "Failed to get frame stats."); while ((pkt = aom_codec_get_cx_data(ctx, &iter)) != NULL) { got_pkts = 1; if (pkt->kind == AOM_CODEC_STATS_PKT) { const uint8_t *const pkt_buf = pkt->data.twopass_stats.buf; const size_t pkt_size = pkt->data.twopass_stats.sz; stats->buf = realloc(stats->buf, stats->sz + pkt_size); memcpy((uint8_t *)stats->buf + stats->sz, pkt_buf, pkt_size); stats->sz += pkt_size; } } return got_pkts; } static int encode_frame(aom_codec_ctx_t *ctx, const aom_image_t *img, aom_codec_pts_t pts, unsigned int duration, aom_enc_frame_flags_t flags, AvxVideoWriter *writer) { int got_pkts = 0; aom_codec_iter_t iter = NULL; const aom_codec_cx_pkt_t *pkt = NULL; const aom_codec_err_t res = aom_codec_encode(ctx, img, pts, duration, flags); if (res != AOM_CODEC_OK) die_codec(ctx, "Failed to encode frame."); while ((pkt = aom_codec_get_cx_data(ctx, &iter)) != NULL) { got_pkts = 1; if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) { const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0; if (!aom_video_writer_write_frame(writer, pkt->data.frame.buf, pkt->data.frame.sz, pkt->data.frame.pts)) die_codec(ctx, "Failed to write compressed frame."); printf(keyframe ? "K" : "."); fflush(stdout); } } return got_pkts; } static void get_raw_image(aom_image_t **frame_to_encode, aom_image_t *raw, aom_image_t *raw_shift) { if (!CONFIG_LOWBITDEPTH) { // Need to allocate larger buffer to use hbd internal. int input_shift = 0; aom_img_upshift(raw_shift, raw, input_shift); *frame_to_encode = raw_shift; } else { *frame_to_encode = raw; } } static aom_fixed_buf_t pass0(aom_image_t *raw, FILE *infile, const AvxInterface *encoder, const aom_codec_enc_cfg_t *cfg, int lf_width, int lf_height, int lf_blocksize, int flags, aom_image_t *raw_shift) { aom_codec_ctx_t codec; int frame_count = 0; int image_size_bytes = aom_img_size_bytes(raw); int u_blocks, v_blocks; int bu, bv; aom_fixed_buf_t stats = { NULL, 0 }; aom_image_t *frame_to_encode; if (aom_codec_enc_init(&codec, encoder->codec_interface(), cfg, flags)) die_codec(&codec, "Failed to initialize encoder"); if (aom_codec_control(&codec, AOME_SET_ENABLEAUTOALTREF, 0)) die_codec(&codec, "Failed to turn off auto altref"); if (aom_codec_control(&codec, AV1E_SET_FRAME_PARALLEL_DECODING, 0)) die_codec(&codec, "Failed to set frame parallel decoding"); // How many reference images we need to encode. u_blocks = (lf_width + lf_blocksize - 1) / lf_blocksize; v_blocks = (lf_height + lf_blocksize - 1) / lf_blocksize; printf("\n First pass: "); for (bv = 0; bv < v_blocks; ++bv) { for (bu = 0; bu < u_blocks; ++bu) { const int block_u_min = bu * lf_blocksize; const int block_v_min = bv * lf_blocksize; int block_u_end = (bu + 1) * lf_blocksize; int block_v_end = (bv + 1) * lf_blocksize; int u_block_size, v_block_size; int block_ref_u, block_ref_v; block_u_end = block_u_end < lf_width ? block_u_end : lf_width; block_v_end = block_v_end < lf_height ? block_v_end : lf_height; u_block_size = block_u_end - block_u_min; v_block_size = block_v_end - block_v_min; block_ref_u = block_u_min + u_block_size / 2; block_ref_v = block_v_min + v_block_size / 2; printf("A%d, ", (block_ref_u + block_ref_v * lf_width)); fseek(infile, (block_ref_u + block_ref_v * lf_width) * image_size_bytes, SEEK_SET); aom_img_read(raw, infile); get_raw_image(&frame_to_encode, raw, raw_shift); // Reference frames can be encoded encoded without tiles. ++frame_count; get_frame_stats(&codec, frame_to_encode, frame_count, 1, AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 | AOM_EFLAG_NO_REF_GF | AOM_EFLAG_NO_REF_ARF | AOM_EFLAG_NO_REF_BWD | AOM_EFLAG_NO_REF_ARF2 | AOM_EFLAG_NO_UPD_LAST | AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF, &stats); } } if (aom_codec_control(&codec, AV1E_SET_FRAME_PARALLEL_DECODING, 1)) die_codec(&codec, "Failed to set frame parallel decoding"); for (bv = 0; bv < v_blocks; ++bv) { for (bu = 0; bu < u_blocks; ++bu) { const int block_u_min = bu * lf_blocksize; const int block_v_min = bv * lf_blocksize; int block_u_end = (bu + 1) * lf_blocksize; int block_v_end = (bv + 1) * lf_blocksize; int u, v; block_u_end = block_u_end < lf_width ? block_u_end : lf_width; block_v_end = block_v_end < lf_height ? block_v_end : lf_height; for (v = block_v_min; v < block_v_end; ++v) { for (u = block_u_min; u < block_u_end; ++u) { printf("C%d, ", (u + v * lf_width)); fseek(infile, (u + v * lf_width) * image_size_bytes, SEEK_SET); aom_img_read(raw, infile); get_raw_image(&frame_to_encode, raw, raw_shift); ++frame_count; get_frame_stats(&codec, frame_to_encode, frame_count, 1, AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 | AOM_EFLAG_NO_REF_GF | AOM_EFLAG_NO_REF_ARF | AOM_EFLAG_NO_REF_BWD | AOM_EFLAG_NO_REF_ARF2 | AOM_EFLAG_NO_UPD_LAST | AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF | AOM_EFLAG_NO_UPD_ENTROPY, &stats); } } } } // Flush encoder. // No ARF, this should not be needed. while (get_frame_stats(&codec, NULL, frame_count, 1, 0, &stats)) { } if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec."); printf("\nFirst pass complete. Processed %d frames.\n", frame_count); return stats; } static void pass1(aom_image_t *raw, FILE *infile, const char *outfile_name, const AvxInterface *encoder, aom_codec_enc_cfg_t *cfg, int lf_width, int lf_height, int lf_blocksize, int flags, aom_image_t *raw_shift) { AvxVideoInfo info = { encoder->fourcc, cfg->g_w, cfg->g_h, { cfg->g_timebase.num, cfg->g_timebase.den }, 0 }; AvxVideoWriter *writer = NULL; aom_codec_ctx_t codec; int frame_count = 0; int image_size_bytes = aom_img_size_bytes(raw); int bu, bv; int u_blocks, v_blocks; aom_image_t *frame_to_encode; aom_image_t reference_images[MAX_EXTERNAL_REFERENCES]; int reference_image_num = 0; int i; writer = aom_video_writer_open(outfile_name, kContainerIVF, &info); if (!writer) die("Failed to open %s for writing", outfile_name); if (aom_codec_enc_init(&codec, encoder->codec_interface(), cfg, flags)) die_codec(&codec, "Failed to initialize encoder"); if (aom_codec_control(&codec, AOME_SET_ENABLEAUTOALTREF, 0)) die_codec(&codec, "Failed to turn off auto altref"); if (aom_codec_control(&codec, AV1E_SET_FRAME_PARALLEL_DECODING, 0)) die_codec(&codec, "Failed to set frame parallel decoding"); // Note: The superblock is a sequence parameter and has to be the same for 1 // sequence. In lightfield application, must choose the superblock size(either // 64x64 or 128x128) before the encoding starts. Otherwise, the default is // AOM_SUPERBLOCK_SIZE_DYNAMIC, and the superblock size will be set to 64x64 // internally. if (aom_codec_control(&codec, AV1E_SET_SUPERBLOCK_SIZE, AOM_SUPERBLOCK_SIZE_64X64)) die_codec(&codec, "Failed to set SB size"); u_blocks = (lf_width + lf_blocksize - 1) / lf_blocksize; v_blocks = (lf_height + lf_blocksize - 1) / lf_blocksize; reference_image_num = u_blocks * v_blocks; aom_img_fmt_t ref_fmt = AOM_IMG_FMT_I420; if (!CONFIG_LOWBITDEPTH) ref_fmt |= AOM_IMG_FMT_HIGHBITDEPTH; // Allocate memory with the border so that it can be used as a reference. for (i = 0; i < reference_image_num; i++) { if (!aom_img_alloc_with_border(&reference_images[i], ref_fmt, cfg->g_w, cfg->g_h, 32, 8, AOM_BORDER_IN_PIXELS)) { die("Failed to allocate image."); } } printf("\n Second pass: "); // Encode reference images first. printf("Encoding Reference Images\n"); for (bv = 0; bv < v_blocks; ++bv) { for (bu = 0; bu < u_blocks; ++bu) { const int block_u_min = bu * lf_blocksize; const int block_v_min = bv * lf_blocksize; int block_u_end = (bu + 1) * lf_blocksize; int block_v_end = (bv + 1) * lf_blocksize; int u_block_size, v_block_size; int block_ref_u, block_ref_v; block_u_end = block_u_end < lf_width ? block_u_end : lf_width; block_v_end = block_v_end < lf_height ? block_v_end : lf_height; u_block_size = block_u_end - block_u_min; v_block_size = block_v_end - block_v_min; block_ref_u = block_u_min + u_block_size / 2; block_ref_v = block_v_min + v_block_size / 2; printf("A%d, ", (block_ref_u + block_ref_v * lf_width)); fseek(infile, (block_ref_u + block_ref_v * lf_width) * image_size_bytes, SEEK_SET); aom_img_read(raw, infile); get_raw_image(&frame_to_encode, raw, raw_shift); // Reference frames may be encoded without tiles. ++frame_count; printf("Encoding reference image %d of %d\n", bv * u_blocks + bu, u_blocks * v_blocks); encode_frame(&codec, frame_to_encode, frame_count, 1, AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 | AOM_EFLAG_NO_REF_GF | AOM_EFLAG_NO_REF_ARF | AOM_EFLAG_NO_REF_BWD | AOM_EFLAG_NO_REF_ARF2 | AOM_EFLAG_NO_UPD_LAST | AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF | AOM_EFLAG_NO_UPD_ENTROPY, writer); if (aom_codec_control(&codec, AV1_COPY_NEW_FRAME_IMAGE, &reference_images[frame_count - 1])) die_codec(&codec, "Failed to copy decoder reference frame"); } } cfg->large_scale_tile = 1; // Fixed q encoding for camera frames. cfg->rc_end_usage = AOM_Q; if (aom_codec_enc_config_set(&codec, cfg)) die_codec(&codec, "Failed to configure encoder"); // The fixed q value used in encoding. if (aom_codec_control(&codec, AOME_SET_CQ_LEVEL, 36)) die_codec(&codec, "Failed to set cq level"); if (aom_codec_control(&codec, AV1E_SET_FRAME_PARALLEL_DECODING, 1)) die_codec(&codec, "Failed to set frame parallel decoding"); if (aom_codec_control(&codec, AV1E_SET_SINGLE_TILE_DECODING, 1)) die_codec(&codec, "Failed to turn on single tile decoding"); // Set tile_columns and tile_rows to MAX values, which guarantees the tile // size of 64 x 64 pixels(i.e. 1 SB) for <= 4k resolution. if (aom_codec_control(&codec, AV1E_SET_TILE_COLUMNS, 6)) die_codec(&codec, "Failed to set tile width"); if (aom_codec_control(&codec, AV1E_SET_TILE_ROWS, 6)) die_codec(&codec, "Failed to set tile height"); for (bv = 0; bv < v_blocks; ++bv) { for (bu = 0; bu < u_blocks; ++bu) { const int block_u_min = bu * lf_blocksize; const int block_v_min = bv * lf_blocksize; int block_u_end = (bu + 1) * lf_blocksize; int block_v_end = (bv + 1) * lf_blocksize; int u, v; block_u_end = block_u_end < lf_width ? block_u_end : lf_width; block_v_end = block_v_end < lf_height ? block_v_end : lf_height; for (v = block_v_min; v < block_v_end; ++v) { for (u = block_u_min; u < block_u_end; ++u) { av1_ref_frame_t ref; ref.idx = 0; ref.use_external_ref = 1; ref.img = reference_images[bv * u_blocks + bu]; if (aom_codec_control(&codec, AV1_SET_REFERENCE, &ref)) die_codec(&codec, "Failed to set reference frame"); printf("C%d, ", (u + v * lf_width)); fseek(infile, (u + v * lf_width) * image_size_bytes, SEEK_SET); aom_img_read(raw, infile); get_raw_image(&frame_to_encode, raw, raw_shift); ++frame_count; printf("Encoding image %d of %d\n", frame_count - (u_blocks * v_blocks), lf_width * lf_height); encode_frame(&codec, frame_to_encode, frame_count, 1, AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 | AOM_EFLAG_NO_REF_GF | AOM_EFLAG_NO_REF_ARF | AOM_EFLAG_NO_REF_BWD | AOM_EFLAG_NO_REF_ARF2 | AOM_EFLAG_NO_UPD_LAST | AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF | AOM_EFLAG_NO_UPD_ENTROPY, writer); } } } } // Flush encoder. // No ARF, this should not be needed. while (encode_frame(&codec, NULL, -1, 1, 0, writer)) { } for (i = 0; i < reference_image_num; i++) aom_img_free(&reference_images[i]); if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec."); aom_video_writer_close(writer); printf("\nSecond pass complete. Processed %d frames.\n", frame_count); } int main(int argc, char **argv) { FILE *infile = NULL; int w, h; // The number of lightfield images in the u and v dimensions. int lf_width, lf_height; // Defines how many images refer to the same reference image for MCP. // lf_blocksize X lf_blocksize images will all use the reference image // in the middle of the block of images. int lf_blocksize; aom_codec_ctx_t codec; aom_codec_enc_cfg_t cfg; aom_image_t raw; aom_image_t raw_shift; aom_codec_err_t res; aom_fixed_buf_t stats; int flags = 0; const AvxInterface *encoder = NULL; const int fps = 30; const int bitrate = 200; // kbit/s const char *const width_arg = argv[1]; const char *const height_arg = argv[2]; const char *const infile_arg = argv[3]; const char *const outfile_arg = argv[4]; const char *const lf_width_arg = argv[5]; const char *const lf_height_arg = argv[6]; const char *lf_blocksize_arg = argv[7]; exec_name = argv[0]; if (argc < 8) die("Invalid number of arguments"); encoder = get_aom_encoder_by_name("av1"); if (!encoder) die("Unsupported codec."); w = (int)strtol(width_arg, NULL, 0); h = (int)strtol(height_arg, NULL, 0); lf_width = (int)strtol(lf_width_arg, NULL, 0); lf_height = (int)strtol(lf_height_arg, NULL, 0); lf_blocksize = (int)strtol(lf_blocksize_arg, NULL, 0); lf_blocksize = lf_blocksize < lf_width ? lf_blocksize : lf_width; lf_blocksize = lf_blocksize < lf_height ? lf_blocksize : lf_height; if (w <= 0 || h <= 0 || (w % 2) != 0 || (h % 2) != 0) die("Invalid frame size: %dx%d", w, h); if (lf_width <= 0 || lf_height <= 0) die("Invalid lf_width and/or lf_height: %dx%d", lf_width, lf_height); if (lf_blocksize <= 0) die("Invalid lf_blocksize: %d", lf_blocksize); if (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, w, h, 32)) { die("Failed to allocate image."); } if (!CONFIG_LOWBITDEPTH) { // Need to allocate larger buffer to use hbd internal. aom_img_alloc(&raw_shift, AOM_IMG_FMT_I420 | AOM_IMG_FMT_HIGHBITDEPTH, w, h, 32); } printf("Using %s\n", aom_codec_iface_name(encoder->codec_interface())); // Configuration res = aom_codec_enc_config_default(encoder->codec_interface(), &cfg, 0); if (res) die_codec(&codec, "Failed to get default codec config."); cfg.g_w = w; cfg.g_h = h; cfg.g_timebase.num = 1; cfg.g_timebase.den = fps; cfg.rc_target_bitrate = bitrate; cfg.g_error_resilient = 0; // This is required. cfg.g_lag_in_frames = 0; // need to set this since default is 19. cfg.kf_mode = AOM_KF_DISABLED; cfg.large_scale_tile = 0; // Only set it to 1 for camera frame encoding. cfg.g_bit_depth = AOM_BITS_8; flags |= (cfg.g_bit_depth > AOM_BITS_8 || !CONFIG_LOWBITDEPTH) ? AOM_CODEC_USE_HIGHBITDEPTH : 0; if (!(infile = fopen(infile_arg, "rb"))) die("Failed to open %s for reading", infile_arg); // Pass 0 cfg.g_pass = AOM_RC_FIRST_PASS; stats = pass0(&raw, infile, encoder, &cfg, lf_width, lf_height, lf_blocksize, flags, &raw_shift); // Pass 1 rewind(infile); cfg.g_pass = AOM_RC_LAST_PASS; cfg.rc_twopass_stats_in = stats; pass1(&raw, infile, outfile_arg, encoder, &cfg, lf_width, lf_height, lf_blocksize, flags, &raw_shift); free(stats.buf); if (!CONFIG_LOWBITDEPTH) aom_img_free(&raw_shift); aom_img_free(&raw); fclose(infile); return EXIT_SUCCESS; }