84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/* akvirtualcamera, virtual camera for Mac and Windows.
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* Copyright (C) 2021 Gonzalo Exequiel Pedone
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*
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* akvirtualcamera is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* akvirtualcamera is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with akvirtualcamera. If not, see <http://www.gnu.org/licenses/>.
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*
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* Web-Site: http://github.com/webcamoid/akvirtualcamera
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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/* For the sake of simplicity, the program won't print anything to the terminal,
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* or do any validation check, you are adviced the check every single value
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* returned by each function.
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* This program shows the very minimum code required to write frames to the
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* plugin.
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*/
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// We'll assume this is a valid akvcam output device.
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#define VIDEO_OUTPUT "AkVCamVideoDevice0"
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// Send frames for about 30 seconds in a 30 FPS stream.
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#define FPS 30
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#define DURATION_SECONDS 30
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#define N_FRAMES (FPS * DURATION_SECONDS)
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int main()
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{
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// Set the parameters of the stream.
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const char cmd[1024];
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const char format[] = "RGB24";
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int width = 640;
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int height = 480;
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snprintf(cmd,
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1024,
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"AkVCamManager stream %s %s %d %d",
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VIDEO_OUTPUT,
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format,
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width,
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height);
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// Start the stream.
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proc = popen(cmd, "w");
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// Allocate the frame buffer.
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size_t buffer_size = 3 * width * height;
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char *buffer = malloc(buffer_size);
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// Generate some random noise frames.
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srand(time(0));
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for (int i = 0; i < N_FRAMES; i++) {
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// Write the frame data to the buffer.
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for (size_t byte = 0; byte < buffer_size; byte++)
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buffer[byte] = rand() & 0xff;
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fwrite(buffer, buffer_size, 1, proc);
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struct timespec ts;
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ts.tv_sec = 0;
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ts.tv_nsec = 1e9 / FPS;
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nanosleep(&ts, &ts);
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}
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// Release the frame buffer.
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free(buffer);
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// Stop the stream.
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pclose(proc);
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return 0;
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}
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