90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
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/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <memory>
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#include <string>
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#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
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#include "webrtc/tools/frame_editing/frame_editing_lib.h"
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#include "webrtc/typedefs.h"
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using std::string;
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namespace webrtc {
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int EditFrames(const string& in_path, int width, int height,
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int first_frame_to_process, int interval,
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int last_frame_to_process, const string& out_path) {
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if (last_frame_to_process < first_frame_to_process) {
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fprintf(stderr, "The set of frames to cut is empty! (l < f)\n");
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return -10;
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}
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FILE* in_fid = fopen(in_path.c_str() , "rb");
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if (!in_fid) {
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fprintf(stderr, "Could not read input file: %s.\n", in_path.c_str());
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return -11;
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}
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// Frame size of I420.
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size_t frame_length = CalcBufferSize(kI420, width, height);
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std::unique_ptr<uint8_t[]> temp_buffer(new uint8_t[frame_length]);
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FILE* out_fid = fopen(out_path.c_str(), "wb");
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if (!out_fid) {
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fprintf(stderr, "Could not open output file: %s.\n", out_path.c_str());
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fclose(in_fid);
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return -12;
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}
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int num_frames_read = 0;
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int num_frames_read_between = 0;
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size_t num_bytes_read;
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while ((num_bytes_read = fread(temp_buffer.get(), 1, frame_length, in_fid))
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== frame_length) {
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num_frames_read++;
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if ((num_frames_read < first_frame_to_process) ||
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(last_frame_to_process < num_frames_read)) {
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fwrite(temp_buffer.get(), 1, frame_length, out_fid);
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} else {
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num_frames_read_between++;
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if (interval <= 0) {
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if (interval == -1) {
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// Remove all frames.
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} else {
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if (((num_frames_read_between - 1) % interval) == 0) {
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// Keep only every |interval| frame.
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fwrite(temp_buffer.get(), 1, frame_length, out_fid);
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}
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}
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} else if (interval > 0) {
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for (int i = 1; i <= interval; ++i) {
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fwrite(temp_buffer.get(), 1, frame_length, out_fid);
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}
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}
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}
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}
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if (num_bytes_read > 0 && num_bytes_read < frame_length) {
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printf("Frame to small! Last frame truncated.\n");
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}
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fclose(in_fid);
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fclose(out_fid);
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printf("Done editing!\n");
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return 0;
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}
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} // namespace webrtc
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