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| 1 /* | |
| 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include <stdio.h> | |
| 12 #include <stdlib.h> | |
| 13 | |
| 14 #include <memory> | |
| 15 #include <string> | |
| 16 | |
| 17 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h" | |
| 18 #include "webrtc/tools/frame_editing/frame_editing_lib.h" | |
| 19 #include "webrtc/typedefs.h" | |
| 20 | |
| 21 namespace webrtc { | |
| 22 | |
| 23 int EditFrames(const std::string& in_path, int width, int height, | |
| 24 int first_frame_to_process, int interval, | |
| 25 int last_frame_to_process, const std::string& out_path) { | |
| 26 if (last_frame_to_process < first_frame_to_process) { | |
| 27 fprintf(stderr, "The set of frames to cut is empty! (l < f)\n"); | |
| 28 return -10; | |
| 29 } | |
| 30 | |
| 31 FILE* in_fid = fopen(in_path.c_str() , "rb"); | |
| 32 if (!in_fid) { | |
| 33 fprintf(stderr, "Could not read input file: %s.\n", in_path.c_str()); | |
| 34 return -11; | |
| 35 } | |
| 36 | |
| 37 // Frame size of I420. | |
| 38 size_t frame_length = CalcBufferSize(VideoType::kI420, width, height); | |
| 39 | |
| 40 std::unique_ptr<uint8_t[]> temp_buffer(new uint8_t[frame_length]); | |
| 41 | |
| 42 FILE* out_fid = fopen(out_path.c_str(), "wb"); | |
| 43 | |
| 44 if (!out_fid) { | |
| 45 fprintf(stderr, "Could not open output file: %s.\n", out_path.c_str()); | |
| 46 fclose(in_fid); | |
| 47 return -12; | |
| 48 } | |
| 49 | |
| 50 int num_frames_read = 0; | |
| 51 int num_frames_read_between = 0; | |
| 52 size_t num_bytes_read; | |
| 53 | |
| 54 while ((num_bytes_read = fread(temp_buffer.get(), 1, frame_length, in_fid)) | |
| 55 == frame_length) { | |
| 56 num_frames_read++; | |
| 57 if ((num_frames_read < first_frame_to_process) || | |
| 58 (last_frame_to_process < num_frames_read)) { | |
| 59 fwrite(temp_buffer.get(), 1, frame_length, out_fid); | |
| 60 } else { | |
| 61 num_frames_read_between++; | |
| 62 if (interval <= 0) { | |
| 63 if (interval == -1) { | |
| 64 // Remove all frames. | |
| 65 } else { | |
| 66 if (((num_frames_read_between - 1) % interval) == 0) { | |
| 67 // Keep only every |interval| frame. | |
| 68 fwrite(temp_buffer.get(), 1, frame_length, out_fid); | |
| 69 } | |
| 70 } | |
| 71 } else if (interval > 0) { | |
| 72 for (int i = 1; i <= interval; ++i) { | |
| 73 fwrite(temp_buffer.get(), 1, frame_length, out_fid); | |
| 74 } | |
| 75 } | |
| 76 } | |
| 77 } | |
| 78 if (num_bytes_read > 0 && num_bytes_read < frame_length) { | |
| 79 printf("Frame to small! Last frame truncated.\n"); | |
| 80 } | |
| 81 fclose(in_fid); | |
| 82 fclose(out_fid); | |
| 83 | |
| 84 printf("Done editing!\n"); | |
| 85 return 0; | |
| 86 } | |
| 87 } // namespace webrtc | |
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