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-rw-r--r--media/libaom/src/examples/lossless_encoder.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/media/libaom/src/examples/lossless_encoder.c b/media/libaom/src/examples/lossless_encoder.c
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+++ b/media/libaom/src/examples/lossless_encoder.c
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+/*
+ * Copyright (c) 2016, 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "aom/aom_encoder.h"
+#include "aom/aomcx.h"
+#include "common/tools_common.h"
+#include "common/video_writer.h"
+
+static const char *exec_name;
+
+void usage_exit(void) {
+ fprintf(stderr,
+ "lossless_encoder: Example demonstrating lossless "
+ "encoding feature. Supports raw input only.\n");
+ fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile>\n", exec_name);
+ exit(EXIT_FAILURE);
+}
+
+static int encode_frame(aom_codec_ctx_t *codec, aom_image_t *img,
+ int frame_index, int 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(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 (!aom_video_writer_write_frame(writer, pkt->data.frame.buf,
+ pkt->data.frame.sz,
+ pkt->data.frame.pts)) {
+ die_codec(codec, "Failed to write compressed frame");
+ }
+ printf(keyframe ? "K" : ".");
+ fflush(stdout);
+ }
+ }
+
+ return got_pkts;
+}
+
+int main(int argc, char **argv) {
+ FILE *infile = NULL;
+ aom_codec_ctx_t codec;
+ aom_codec_enc_cfg_t cfg;
+ int frame_count = 0;
+ aom_image_t raw;
+ aom_codec_err_t res;
+ AvxVideoInfo info;
+ AvxVideoWriter *writer = NULL;
+ const AvxInterface *encoder = NULL;
+ const int fps = 30;
+
+ 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 < 5) die("Invalid number of arguments");
+
+ encoder = get_aom_encoder_by_name("av1");
+ if (!encoder) die("Unsupported codec.");
+
+ info.codec_fourcc = encoder->fourcc;
+ info.frame_width = (int)strtol(argv[1], NULL, 0);
+ info.frame_height = (int)strtol(argv[2], 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(&raw, AOM_IMG_FMT_I420, info.frame_width,
+ info.frame_height, 1)) {
+ die("Failed to allocate image.");
+ }
+
+ 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;
+
+ writer = aom_video_writer_open(argv[4], kContainerIVF, &info);
+ if (!writer) die("Failed to open %s for writing.", argv[4]);
+
+ if (!(infile = fopen(argv[3], "rb")))
+ die("Failed to open %s for reading.", argv[3]);
+
+ if (aom_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0))
+ die_codec(&codec, "Failed to initialize encoder");
+
+ if (aom_codec_control_(&codec, AV1E_SET_LOSSLESS, 1))
+ die_codec(&codec, "Failed to use lossless mode");
+
+ // Encode frames.
+ while (aom_img_read(&raw, infile)) {
+ encode_frame(&codec, &raw, frame_count++, 0, writer);
+ }
+
+ // Flush encoder.
+ while (encode_frame(&codec, NULL, -1, 0, writer)) {
+ }
+
+ printf("\n");
+ fclose(infile);
+ printf("Processed %d frames.\n", frame_count);
+
+ aom_img_free(&raw);
+ if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");
+
+ aom_video_writer_close(writer);
+
+ return EXIT_SUCCESS;
+}