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Diffstat (limited to 'third_party/aom/examples/lightfield_encoder.c')
| -rw-r--r-- | third_party/aom/examples/lightfield_encoder.c | 525 |
1 files changed, 525 insertions, 0 deletions
diff --git a/third_party/aom/examples/lightfield_encoder.c b/third_party/aom/examples/lightfield_encoder.c new file mode 100644 index 0000000000..9aef836ac2 --- /dev/null +++ b/third_party/aom/examples/lightfield_encoder.c @@ -0,0 +1,525 @@ +/* + * 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 "av1/encoder/encoder_utils.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 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); + if (!stats->buf) die("Failed to allocate frame stats buffer."); + 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 (FORCE_HIGHBITDEPTH_DECODING) { + // 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, + aom_codec_iface_t *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 = 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, cfg, flags)) + die("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, + aom_codec_iface_t *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 = { get_fourcc_by_aom_encoder(encoder), + 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 = 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, cfg, flags)) + die("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"); + if (aom_codec_control(&codec, AV1E_ENABLE_EXT_TILE_DEBUG, 1)) + die_codec(&codec, "Failed to enable encoder ext_tile debug"); + if (aom_codec_control(&codec, AOME_SET_CPUUSED, 3)) + die_codec(&codec, "Failed to set cpu-used"); + + // 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; + // Set the max gf group length so the references are guaranteed to be in + // a different gf group than any of the regular frames. This avoids using + // both vbr and constant quality mode in a single group. The number of + // references now cannot surpass 17 because of the enforced MAX_GF_INTERVAL of + // 16. If it is necessary to exceed this reference frame limit, one will have + // to do some additional handling to ensure references are in separate gf + // groups from the regular frames. + if (aom_codec_control(&codec, AV1E_SET_MAX_GF_INTERVAL, + reference_image_num - 1)) + die_codec(&codec, "Failed to set max gf interval"); + aom_img_fmt_t ref_fmt = AOM_IMG_FMT_I420; + if (FORCE_HIGHBITDEPTH_DECODING) ref_fmt |= AOM_IMG_FMT_HIGHBITDEPTH; + // Allocate memory with the border so that it can be used as a reference. + const bool resize = + codec.config.enc->rc_resize_mode || codec.config.enc->rc_superres_mode; + const bool all_intra = reference_image_num - 1 == 0; + int border_in_pixels = + av1_get_enc_border_size(resize, all_intra, BLOCK_64X64); + + 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, 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."); + + // Modify large_scale_file fourcc. + if (cfg->large_scale_tile == 1) + aom_video_writer_set_fourcc(writer, LST_FOURCC); + 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 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"); + + aom_codec_iface_t *encoder = get_aom_encoder_by_short_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 (FORCE_HIGHBITDEPTH_DECODING) { + // 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)); + + // Configuration + res = aom_codec_enc_config_default(encoder, &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 || FORCE_HIGHBITDEPTH_DECODING) + ? 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 (FORCE_HIGHBITDEPTH_DECODING) aom_img_free(&raw_shift); + aom_img_free(&raw); + fclose(infile); + + return EXIT_SUCCESS; +} |