288 lines
10 KiB
C
288 lines
10 KiB
C
/*
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* Copyright (c) 2018, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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// Scalable Encoder
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// ==============
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//
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// This is an example of a scalable encoder loop. It takes two input files in
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// YV12 format, passes it through the encoder, and writes the compressed
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// frames to disk in OBU format.
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//
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// Getting The Default Configuration
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// ---------------------------------
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// Encoders have the notion of "usage profiles." For example, an encoder
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// may want to publish default configurations for both a video
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// conferencing application and a best quality offline encoder. These
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// obviously have very different default settings. Consult the
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// documentation for your codec to see if it provides any default
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// configurations. All codecs provide a default configuration, number 0,
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// which is valid for material in the vacinity of QCIF/QVGA.
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//
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// Updating The Configuration
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// ---------------------------------
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// Almost all applications will want to update the default configuration
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// with settings specific to their usage. Here we set the width and height
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// of the video file to that specified on the command line. We also scale
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// the default bitrate based on the ratio between the default resolution
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// and the resolution specified on the command line.
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//
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// Encoding A Frame
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// ----------------
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// The frame is read as a continuous block (size = width * height * 3 / 2)
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// from the input file. If a frame was read (the input file has not hit
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// EOF) then the frame is passed to the encoder. Otherwise, a NULL
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// is passed, indicating the End-Of-Stream condition to the encoder. The
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// `frame_cnt` is reused as the presentation time stamp (PTS) and each
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// frame is shown for one frame-time in duration. The flags parameter is
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// unused in this example.
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// Forced Keyframes
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// ----------------
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// Keyframes can be forced by setting the AOM_EFLAG_FORCE_KF bit of the
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// flags passed to `aom_codec_control()`. In this example, we force a
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// keyframe every <keyframe-interval> frames. Note, the output stream can
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// contain additional keyframes beyond those that have been forced using the
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// AOM_EFLAG_FORCE_KF flag because of automatic keyframe placement by the
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// encoder.
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//
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// Processing The Encoded Data
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// ---------------------------
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// Each packet of type `AOM_CODEC_CX_FRAME_PKT` contains the encoded data
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// for this frame. We write a IVF frame header, followed by the raw data.
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//
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// Cleanup
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// -------
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// The `aom_codec_destroy` call frees any memory allocated by the codec.
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//
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// Error Handling
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// --------------
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// This example does not special case any error return codes. If there was
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// an error, a descriptive message is printed and the program exits. With
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// few exeptions, aom_codec functions return an enumerated error status,
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// with the value `0` indicating success.
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "aom/aom_encoder.h"
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#include "aom/aomcx.h"
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#include "av1/common/enums.h"
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#include "common/tools_common.h"
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#include "common/video_writer.h"
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static const char *exec_name;
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void usage_exit(void) {
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fprintf(stderr,
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"Usage: %s <codec> <width> <height> <infile0> <infile1> "
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"<outfile> <frames to encode>\n"
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"See comments in scalable_encoder.c for more information.\n",
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exec_name);
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exit(EXIT_FAILURE);
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}
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static int encode_frame(aom_codec_ctx_t *codec, aom_image_t *img,
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int frame_index, int flags, FILE *outfile) {
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int got_pkts = 0;
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aom_codec_iter_t iter = NULL;
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const aom_codec_cx_pkt_t *pkt = NULL;
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const aom_codec_err_t res =
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aom_codec_encode(codec, img, frame_index, 1, flags);
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if (res != AOM_CODEC_OK) die_codec(codec, "Failed to encode frame");
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while ((pkt = aom_codec_get_cx_data(codec, &iter)) != NULL) {
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got_pkts = 1;
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if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) {
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const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0;
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if (fwrite(pkt->data.frame.buf, 1, pkt->data.frame.sz, outfile) !=
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pkt->data.frame.sz) {
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die_codec(codec, "Failed to write compressed frame");
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}
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printf(keyframe ? "K" : ".");
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printf(" %6d\n", (int)pkt->data.frame.sz);
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fflush(stdout);
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}
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}
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return got_pkts;
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}
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int main(int argc, char **argv) {
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FILE *infile0 = NULL;
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FILE *infile1 = NULL;
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aom_codec_enc_cfg_t cfg;
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int frame_count = 0;
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aom_image_t raw0, raw1;
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aom_codec_err_t res;
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AvxVideoInfo info;
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const int fps = 30;
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const int bitrate = 200;
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int keyframe_interval = 0;
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int max_frames = 0;
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int frames_encoded = 0;
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const char *codec_arg = NULL;
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const char *width_arg = NULL;
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const char *height_arg = NULL;
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const char *infile0_arg = NULL;
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const char *infile1_arg = NULL;
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const char *outfile_arg = NULL;
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// const char *keyframe_interval_arg = NULL;
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FILE *outfile = NULL;
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exec_name = argv[0];
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// Clear explicitly, as simply assigning "{ 0 }" generates
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// "missing-field-initializers" warning in some compilers.
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memset(&info, 0, sizeof(info));
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if (argc != 8) die("Invalid number of arguments");
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codec_arg = argv[1];
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width_arg = argv[2];
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height_arg = argv[3];
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infile0_arg = argv[4];
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infile1_arg = argv[5];
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outfile_arg = argv[6];
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max_frames = (int)strtol(argv[7], NULL, 0);
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aom_codec_iface_t *encoder = get_aom_encoder_by_short_name(codec_arg);
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if (!encoder) die("Unsupported codec.");
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info.codec_fourcc = get_fourcc_by_aom_encoder(encoder);
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info.frame_width = (int)strtol(width_arg, NULL, 0);
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info.frame_height = (int)strtol(height_arg, NULL, 0);
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info.time_base.numerator = 1;
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info.time_base.denominator = fps;
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if (info.frame_width <= 0 || info.frame_height <= 0 ||
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(info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) {
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die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
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}
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if (!aom_img_alloc(&raw0, AOM_IMG_FMT_I420, info.frame_width,
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info.frame_height, 1)) {
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die("Failed to allocate image for layer 0.");
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}
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if (!aom_img_alloc(&raw1, AOM_IMG_FMT_I420, info.frame_width,
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info.frame_height, 1)) {
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die("Failed to allocate image for layer 1.");
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}
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// keyframe_interval = (int)strtol(keyframe_interval_arg, NULL, 0);
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keyframe_interval = 100;
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if (keyframe_interval < 0) die("Invalid keyframe interval value.");
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printf("Using %s\n", aom_codec_iface_name(encoder));
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aom_codec_ctx_t codec;
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res = aom_codec_enc_config_default(encoder, &cfg, 0);
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if (res) die_codec(&codec, "Failed to get default codec config.");
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cfg.g_w = info.frame_width;
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cfg.g_h = info.frame_height;
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cfg.g_timebase.num = info.time_base.numerator;
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cfg.g_timebase.den = info.time_base.denominator;
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cfg.rc_target_bitrate = bitrate;
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cfg.g_error_resilient = 0;
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cfg.g_lag_in_frames = 0;
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cfg.rc_end_usage = AOM_Q;
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cfg.save_as_annexb = 0;
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outfile = fopen(outfile_arg, "wb");
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if (!outfile) die("Failed to open %s for writing.", outfile_arg);
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if (!(infile0 = fopen(infile0_arg, "rb")))
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die("Failed to open %s for reading.", infile0_arg);
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if (!(infile1 = fopen(infile1_arg, "rb")))
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die("Failed to open %s for reading.", infile0_arg);
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if (aom_codec_enc_init(&codec, encoder, &cfg, 0))
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die("Failed to initialize encoder");
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if (aom_codec_control(&codec, AOME_SET_CPUUSED, 8))
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die_codec(&codec, "Failed to set cpu to 8");
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if (aom_codec_control(&codec, AV1E_SET_TILE_COLUMNS, 2))
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die_codec(&codec, "Failed to set tile columns to 2");
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if (aom_codec_control(&codec, AV1E_SET_NUM_TG, 3))
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die_codec(&codec, "Failed to set num of tile groups to 3");
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if (aom_codec_control(&codec, AOME_SET_NUMBER_SPATIAL_LAYERS, 2))
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die_codec(&codec, "Failed to set number of spatial layers to 2");
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// Encode frames.
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while (aom_img_read(&raw0, infile0)) {
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int flags = 0;
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// configure and encode base layer
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if (keyframe_interval > 0 && frames_encoded % keyframe_interval == 0)
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flags |= AOM_EFLAG_FORCE_KF;
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else
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// use previous base layer (LAST) as sole reference
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// save this frame as LAST to be used as reference by enhanmcent layer
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// and next base layer
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flags |= AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 |
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AOM_EFLAG_NO_REF_GF | AOM_EFLAG_NO_REF_ARF |
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AOM_EFLAG_NO_REF_BWD | AOM_EFLAG_NO_REF_ARF2 |
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AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF |
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AOM_EFLAG_NO_UPD_ENTROPY;
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cfg.g_w = info.frame_width;
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cfg.g_h = info.frame_height;
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if (aom_codec_enc_config_set(&codec, &cfg))
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die_codec(&codec, "Failed to set enc cfg for layer 0");
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if (aom_codec_control(&codec, AOME_SET_SPATIAL_LAYER_ID, 0))
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die_codec(&codec, "Failed to set layer id to 0");
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if (aom_codec_control(&codec, AOME_SET_CQ_LEVEL, 62))
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die_codec(&codec, "Failed to set cq level");
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encode_frame(&codec, &raw0, frame_count++, flags, outfile);
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// configure and encode enhancement layer
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// use LAST (base layer) as sole reference
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flags = AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 |
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AOM_EFLAG_NO_REF_GF | AOM_EFLAG_NO_REF_ARF | AOM_EFLAG_NO_REF_BWD |
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AOM_EFLAG_NO_REF_ARF2 | AOM_EFLAG_NO_UPD_LAST |
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AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF |
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AOM_EFLAG_NO_UPD_ENTROPY;
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cfg.g_w = info.frame_width;
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cfg.g_h = info.frame_height;
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aom_img_read(&raw1, infile1);
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if (aom_codec_enc_config_set(&codec, &cfg))
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die_codec(&codec, "Failed to set enc cfg for layer 1");
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if (aom_codec_control(&codec, AOME_SET_SPATIAL_LAYER_ID, 1))
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die_codec(&codec, "Failed to set layer id to 1");
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if (aom_codec_control(&codec, AOME_SET_CQ_LEVEL, 10))
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die_codec(&codec, "Failed to set cq level");
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encode_frame(&codec, &raw1, frame_count++, flags, outfile);
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frames_encoded++;
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if (max_frames > 0 && frames_encoded >= max_frames) break;
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}
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// Flush encoder.
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while (encode_frame(&codec, NULL, -1, 0, outfile)) continue;
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printf("\n");
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fclose(infile0);
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fclose(infile1);
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printf("Processed %d frames.\n", frame_count / 2);
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aom_img_free(&raw0);
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aom_img_free(&raw1);
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if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");
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fclose(outfile);
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return EXIT_SUCCESS;
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}
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