| /* |
| * Copyright (c) 2021, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 3-Clause Clear License |
| * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear |
| * License was not distributed with this source code in the LICENSE file, you |
| * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. 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 |
| * aomedia.org/license/patent-license/. |
| */ |
| |
| // Scalable Encoder |
| // ============== |
| // |
| // This is an example of a scalable encoder loop. It takes two input files in |
| // YV12 format, passes it through the encoder, and writes the compressed |
| // frames to disk in OBU format. |
| // |
| // Getting The Default Configuration |
| // --------------------------------- |
| // Encoders have the notion of "usage profiles." For example, an encoder |
| // may want to publish default configurations for both a video |
| // conferencing application and a best quality offline encoder. These |
| // obviously have very different default settings. Consult the |
| // documentation for your codec to see if it provides any default |
| // configurations. All codecs provide a default configuration, number 0, |
| // which is valid for material in the vacinity of QCIF/QVGA. |
| // |
| // Updating The Configuration |
| // --------------------------------- |
| // Almost all applications will want to update the default configuration |
| // with settings specific to their usage. Here we set the width and height |
| // of the video file to that specified on the command line. We also scale |
| // the default bitrate based on the ratio between the default resolution |
| // and the resolution specified on the command line. |
| // |
| // Encoding A Frame |
| // ---------------- |
| // The frame is read as a continuous block (size = width * height * 3 / 2) |
| // from the input file. If a frame was read (the input file has not hit |
| // EOF) then the frame is passed to the encoder. Otherwise, a NULL |
| // is passed, indicating the End-Of-Stream condition to the encoder. The |
| // `frame_cnt` is reused as the presentation time stamp (PTS) and each |
| // frame is shown for one frame-time in duration. The flags parameter is |
| // unused in this example. |
| |
| // Forced Keyframes |
| // ---------------- |
| // Keyframes can be forced by setting the AOM_EFLAG_FORCE_KF bit of the |
| // flags passed to `aom_codec_control()`. In this example, we force a |
| // keyframe every <keyframe-interval> frames. Note, the output stream can |
| // contain additional keyframes beyond those that have been forced using the |
| // AOM_EFLAG_FORCE_KF flag because of automatic keyframe placement by the |
| // encoder. |
| // |
| // Processing The Encoded Data |
| // --------------------------- |
| // Each packet of type `AOM_CODEC_CX_FRAME_PKT` contains the encoded data |
| // for this frame. We write a IVF frame header, followed by the raw data. |
| // |
| // Cleanup |
| // ------- |
| // The `aom_codec_destroy` call frees any memory allocated by the codec. |
| // |
| // Error Handling |
| // -------------- |
| // This example does not special case any error return codes. If there was |
| // an error, a descriptive message is printed and the program exits. With |
| // few exeptions, aom_codec functions return an enumerated error status, |
| // with the value `0` indicating success. |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "aom/aom_encoder.h" |
| #include "aom/aomcx.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 <codec> <width> <height> <infile0> <infile1> " |
| "<outfile> <frames to encode>\n" |
| "See comments in scalable_encoder.c for more information.\n", |
| exec_name); |
| exit(EXIT_FAILURE); |
| } |
| |
| static int encode_frame(aom_codec_ctx_t *codec, aom_image_t *img, |
| int frame_index, int flags, FILE *outfile) { |
| 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(codec, img, frame_index, 1, flags); |
| if (res != AOM_CODEC_OK) die_codec(codec, "Failed to encode frame"); |
| |
| while ((pkt = aom_codec_get_cx_data(codec, &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 (fwrite(pkt->data.frame.buf, 1, pkt->data.frame.sz, outfile) != |
| pkt->data.frame.sz) { |
| die_codec(codec, "Failed to write compressed frame"); |
| } |
| printf(keyframe ? "K" : "."); |
| printf(" %6d\n", (int)pkt->data.frame.sz); |
| fflush(stdout); |
| } |
| } |
| |
| return got_pkts; |
| } |
| |
| int main(int argc, char **argv) { |
| FILE *infile0 = NULL; |
| FILE *infile1 = NULL; |
| aom_codec_enc_cfg_t cfg; |
| int frame_count = 0; |
| aom_image_t raw0, raw1; |
| aom_codec_err_t res; |
| AvxVideoInfo info; |
| const int fps = 30; |
| const int bitrate = 200; |
| int keyframe_interval = 0; |
| int max_frames = 0; |
| int frames_encoded = 0; |
| const char *codec_arg = NULL; |
| const char *width_arg = NULL; |
| const char *height_arg = NULL; |
| const char *infile0_arg = NULL; |
| const char *infile1_arg = NULL; |
| const char *outfile_arg = NULL; |
| // const char *keyframe_interval_arg = NULL; |
| FILE *outfile = NULL; |
| |
| exec_name = argv[0]; |
| |
| // Clear explicitly, as simply assigning "{ 0 }" generates |
| // "missing-field-initializers" warning in some compilers. |
| memset(&info, 0, sizeof(info)); |
| |
| if (argc != 8) die("Invalid number of arguments"); |
| |
| codec_arg = argv[1]; |
| width_arg = argv[2]; |
| height_arg = argv[3]; |
| infile0_arg = argv[4]; |
| infile1_arg = argv[5]; |
| outfile_arg = argv[6]; |
| max_frames = (int)strtol(argv[7], NULL, 0); |
| |
| aom_codec_iface_t *encoder = get_aom_encoder_by_short_name(codec_arg); |
| if (!encoder) die("Unsupported codec."); |
| |
| info.codec_fourcc = get_fourcc_by_aom_encoder(encoder); |
| info.frame_width = (int)strtol(width_arg, NULL, 0); |
| info.frame_height = (int)strtol(height_arg, NULL, 0); |
| info.time_base.numerator = 1; |
| info.time_base.denominator = fps; |
| |
| if (info.frame_width <= 0 || info.frame_height <= 0 || |
| (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) { |
| die("Invalid frame size: %dx%d", info.frame_width, info.frame_height); |
| } |
| |
| if (!aom_img_alloc(&raw0, AOM_IMG_FMT_I420, info.frame_width, |
| info.frame_height, 1)) { |
| die("Failed to allocate image for layer 0."); |
| } |
| if (!aom_img_alloc(&raw1, AOM_IMG_FMT_I420, info.frame_width, |
| info.frame_height, 1)) { |
| die("Failed to allocate image for layer 1."); |
| } |
| |
| // keyframe_interval = (int)strtol(keyframe_interval_arg, NULL, 0); |
| keyframe_interval = 100; |
| if (keyframe_interval < 0) die("Invalid keyframe interval value."); |
| |
| printf("Using %s\n", aom_codec_iface_name(encoder)); |
| |
| aom_codec_ctx_t codec; |
| res = aom_codec_enc_config_default(encoder, &cfg, 0); |
| if (res) die_codec(&codec, "Failed to get default codec config."); |
| |
| cfg.g_w = info.frame_width; |
| cfg.g_h = info.frame_height; |
| cfg.g_timebase.num = info.time_base.numerator; |
| cfg.g_timebase.den = info.time_base.denominator; |
| cfg.rc_target_bitrate = bitrate; |
| cfg.g_error_resilient = 0; |
| cfg.g_lag_in_frames = 0; |
| cfg.rc_end_usage = AOM_Q; |
| cfg.save_as_annexb = 0; |
| |
| outfile = fopen(outfile_arg, "wb"); |
| if (!outfile) die("Failed to open %s for writing.", outfile_arg); |
| |
| if (!(infile0 = fopen(infile0_arg, "rb"))) |
| die("Failed to open %s for reading.", infile0_arg); |
| if (!(infile1 = fopen(infile1_arg, "rb"))) |
| die("Failed to open %s for reading.", infile0_arg); |
| |
| if (aom_codec_enc_init(&codec, encoder, &cfg, 0)) |
| die("Failed to initialize encoder"); |
| if (aom_codec_control(&codec, AOME_SET_CPUUSED, 8)) |
| die_codec(&codec, "Failed to set cpu to 8"); |
| |
| if (aom_codec_control(&codec, AV1E_SET_TILE_COLUMNS, 2)) |
| die_codec(&codec, "Failed to set tile columns to 2"); |
| if (aom_codec_control(&codec, AV1E_SET_NUM_TG, 3)) |
| die_codec(&codec, "Failed to set num of tile groups to 3"); |
| |
| if (aom_codec_control(&codec, AOME_SET_NUMBER_SPATIAL_LAYERS, 2)) |
| die_codec(&codec, "Failed to set number of spatial layers to 2"); |
| |
| // Encode frames. |
| while (aom_img_read(&raw0, infile0)) { |
| int flags = 0; |
| |
| // configure and encode base layer |
| |
| if (keyframe_interval > 0 && frames_encoded % keyframe_interval == 0) |
| flags |= AOM_EFLAG_FORCE_KF; |
| else |
| // use previous base layer (LAST) as sole reference |
| // save this frame as LAST to be used as reference by enhanmcent layer |
| // and next base layer |
| flags |= 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_ENTROPY; |
| cfg.g_w = info.frame_width; |
| cfg.g_h = info.frame_height; |
| if (aom_codec_enc_config_set(&codec, &cfg)) |
| die_codec(&codec, "Failed to set enc cfg for layer 0"); |
| if (aom_codec_control(&codec, AOME_SET_SPATIAL_LAYER_ID, 0)) |
| die_codec(&codec, "Failed to set layer id to 0"); |
| if (aom_codec_control(&codec, AOME_SET_QP, 62)) |
| die_codec(&codec, "Failed to set cq level"); |
| encode_frame(&codec, &raw0, frame_count++, flags, outfile); |
| |
| // configure and encode enhancement layer |
| |
| // use LAST (base layer) as sole reference |
| flags = 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_ALL | |
| AOM_EFLAG_NO_UPD_ENTROPY; |
| cfg.g_w = info.frame_width; |
| cfg.g_h = info.frame_height; |
| aom_img_read(&raw1, infile1); |
| if (aom_codec_enc_config_set(&codec, &cfg)) |
| die_codec(&codec, "Failed to set enc cfg for layer 1"); |
| if (aom_codec_control(&codec, AOME_SET_SPATIAL_LAYER_ID, 1)) |
| die_codec(&codec, "Failed to set layer id to 1"); |
| if (aom_codec_control(&codec, AOME_SET_QP, 10)) |
| die_codec(&codec, "Failed to set cq level"); |
| encode_frame(&codec, &raw1, frame_count++, flags, outfile); |
| |
| frames_encoded++; |
| |
| if (max_frames > 0 && frames_encoded >= max_frames) break; |
| } |
| |
| // Flush encoder. |
| while (encode_frame(&codec, NULL, -1, 0, outfile)) continue; |
| |
| printf("\n"); |
| fclose(infile0); |
| fclose(infile1); |
| printf("Processed %d frames.\n", frame_count / 2); |
| |
| aom_img_free(&raw0); |
| aom_img_free(&raw1); |
| if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec."); |
| |
| fclose(outfile); |
| |
| return EXIT_SUCCESS; |
| } |