| /* |
| * 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. |
| */ |
| |
| // Frame-by-frame MD5 Checksum |
| // =========================== |
| // |
| // This example builds upon the simple decoder loop to show how checksums |
| // of the decoded output can be generated. These are used for validating |
| // decoder implementations against the reference implementation, for example. |
| // |
| // MD5 algorithm |
| // ------------- |
| // The Message-Digest 5 (MD5) is a well known hash function. We have provided |
| // an implementation derived from the RSA Data Security, Inc. MD5 Message-Digest |
| // Algorithm for your use. Our implmentation only changes the interface of this |
| // reference code. You must include the `md5_utils.h` header for access to these |
| // functions. |
| // |
| // Processing The Decoded Data |
| // --------------------------- |
| // Each row of the image is passed to the MD5 accumulator. First the Y plane |
| // is processed, then U, then V. It is important to honor the image's `stride` |
| // values. |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "aom/aom_decoder.h" |
| #include "aom/aomdx.h" |
| #include "common/md5_utils.h" |
| #include "common/tools_common.h" |
| #include "common/video_reader.h" |
| |
| static void get_image_md5(const aom_image_t *img, unsigned char digest[16]) { |
| int plane, y; |
| MD5Context md5; |
| |
| MD5Init(&md5); |
| |
| for (plane = 0; plane < 3; ++plane) { |
| const unsigned char *buf = img->planes[plane]; |
| const int stride = img->stride[plane]; |
| const int w = plane ? (img->d_w + 1) >> 1 : img->d_w; |
| const int h = plane ? (img->d_h + 1) >> 1 : img->d_h; |
| |
| for (y = 0; y < h; ++y) { |
| MD5Update(&md5, buf, w); |
| buf += stride; |
| } |
| } |
| |
| MD5Final(digest, &md5); |
| } |
| |
| static void print_md5(FILE *stream, unsigned char digest[16]) { |
| int i; |
| |
| for (i = 0; i < 16; ++i) fprintf(stream, "%02x", digest[i]); |
| } |
| |
| static const char *exec_name; |
| |
| void usage_exit(void) { |
| fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name); |
| exit(EXIT_FAILURE); |
| } |
| |
| int main(int argc, char **argv) { |
| int frame_cnt = 0; |
| FILE *outfile = NULL; |
| AvxVideoReader *reader = NULL; |
| const AvxVideoInfo *info = NULL; |
| |
| exec_name = argv[0]; |
| |
| if (argc != 3) die("Invalid number of arguments."); |
| |
| reader = aom_video_reader_open(argv[1]); |
| if (!reader) die("Failed to open %s for reading.", argv[1]); |
| |
| if (!(outfile = fopen(argv[2], "wb"))) |
| die("Failed to open %s for writing.", argv[2]); |
| |
| info = aom_video_reader_get_info(reader); |
| |
| aom_codec_iface_t *decoder = get_aom_decoder_by_fourcc(info->codec_fourcc); |
| if (!decoder) die("Unknown input codec."); |
| |
| printf("Using %s\n", aom_codec_iface_name(decoder)); |
| |
| aom_codec_ctx_t codec; |
| if (aom_codec_dec_init(&codec, decoder, NULL, 0)) |
| die("Failed to initialize decoder"); |
| |
| while (aom_video_reader_read_frame(reader)) { |
| aom_codec_iter_t iter = NULL; |
| aom_image_t *img = NULL; |
| size_t frame_size = 0; |
| const unsigned char *frame = |
| aom_video_reader_get_frame(reader, &frame_size); |
| if (aom_codec_decode(&codec, frame, frame_size, NULL)) |
| die_codec(&codec, "Failed to decode frame"); |
| |
| while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) { |
| unsigned char digest[16]; |
| |
| get_image_md5(img, digest); |
| print_md5(outfile, digest); |
| fprintf(outfile, " img-%ux%u-%04d.i420\n", img->d_w, img->d_h, |
| ++frame_cnt); |
| } |
| } |
| |
| printf("Processed %d frames.\n", frame_cnt); |
| if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec."); |
| |
| aom_video_reader_close(reader); |
| |
| fclose(outfile); |
| return EXIT_SUCCESS; |
| } |