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+/*
+ * 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.
+ */
+
+// 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_ctx_t codec;
+ aom_codec_enc_cfg_t cfg;
+ int frame_count = 0;
+ aom_image_t raw0, raw1;
+ aom_codec_err_t res;
+ AvxVideoInfo info;
+ const AvxInterface *encoder = NULL;
+ 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);
+
+ encoder = get_aom_encoder_by_name(codec_arg);
+ if (!encoder) die("Unsupported codec.");
+
+ info.codec_fourcc = encoder->fourcc;
+ 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->codec_interface()));
+
+ 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 = 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->codec_interface(), &cfg, 0))
+ die_codec(&codec, "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_GF | AOM_EFLAG_NO_UPD_ARF |
+ 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_CQ_LEVEL, 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_LAST |
+ AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF |
+ 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_CQ_LEVEL, 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;
+}