akvirtualcamera/share/examples/output_mac.c
2021-06-22 14:54:33 -03:00

84 lines
2.4 KiB
C

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