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Diffstat (limited to '')
-rw-r--r-- | third_party/aom/examples/lossless_encoder.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/third_party/aom/examples/lossless_encoder.c b/third_party/aom/examples/lossless_encoder.c new file mode 100644 index 0000000000..1971b9c9df --- /dev/null +++ b/third_party/aom/examples/lossless_encoder.c @@ -0,0 +1,137 @@ +/* + * 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_enc_cfg_t cfg; + int frame_count = 0; + aom_image_t raw; + aom_codec_err_t res; + AvxVideoInfo info; + AvxVideoWriter *writer = 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"); + + aom_codec_iface_t *encoder = get_aom_encoder_by_short_name("av1"); + if (!encoder) die("Unsupported codec."); + + info.codec_fourcc = get_fourcc_by_aom_encoder(encoder); + 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)); + + 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; + + 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, &cfg, 0)) + die("Failed to initialize encoder"); + + if (AOM_CODEC_CONTROL_TYPECHECKED(&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; +} |