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Add example code and config file.

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Gonzalo Exequiel Pedone 2021-05-28 18:04:24 -03:00
parent 8341fa0067
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1
VCamUtils/src/videoformat.cpp
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*/
#include <algorithm>
#include <limits>
#include <map>
#include <ostream>

55
share/config_example.ini Normal file
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# Virtual camera configuration file example.
#
# Please, read the instructions to the end.
[Cameras]
# First at all you must define how many virtual cameras will be created.
cameras/size = 2
# Then, define it's properties.
#
# 'formats' is a comma separated list of index in the format list bellow.
cameras/1/description = Virtual Camera
cameras/1/formats = 2
cameras/2/description = My Other Virtual Camera
cameras/2/formats = 1, 2
[Formats]
# Define how many formats will be supported by the camera.
formats/size = 2
# Now define the frame pixel formats, resolutions and frame rates supported by
# the camera.
# YUY2 640x480 is one of the most widely supported formats in webcam capture
# programs. First format defined is the default frame format.
# 'width', 'height' and 'fps' are unsigned integers.
formats/1/format = YUY2
formats/1/width = 640
formats/1/height = 480
formats/1/fps = 30
# The parameters can also be specified as a comma separated list, so it's
# possible to combine the parameters to define several formats in one group.
# 'fps' can also be defined as a fraction.
# The following lines will define 4 formats:
#
# RGB24 640x480 20 FPS
# RGB24 640x480 7.5 FPS
# YUY2 640x480 20 FPS
# YUY2 640x480 7.5 FPS
formats/2/format = RGB24, YUY2
formats/2/width = 640
formats/2/height = 480
formats/2/fps = 20/1, 15/2
# You can also define a default frame when the device is not receiving any
# input.
# You must give a full path to a picture file, the supported formats for the
# picture are:
#
# BMP (24 bpp and 32 bpp).
# JPG
# PNG
[General]
default_frame = /path/to/default_frame.png

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share/examples/output_mac.c Normal file
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/* 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.
malloc(buffer);
// Stop the stream.
pclose(proc);
return 0;
}

140
share/examples/output_windows.c Normal file
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/* 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 <windows.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)
struct StreamProcess
{
HANDLE stdinReadPipe;
HANDLE stdinWritePipe;
SECURITY_ATTRIBUTES pipeAttributes;
STARTUPINFOA startupInfo;
PROCESS_INFORMATION procInfo;
};
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);
// Get the handles to the standard input and standard output.
struct StreamProcess streamProc;
memset(&streamProc, 0, sizeof(struct StreamProcess));
streamProc.stdinReadPipe = NULL;
streamProc.stdinWritePipe = NULL;
memset(&streamProc.pipeAttributes, 0, sizeof(struct SECURITY_ATTRIBUTES));
streamProc.pipeAttributes.nLength = sizeof(struct SECURITY_ATTRIBUTES);
streamProc.pipeAttributes.bInheritHandle = true;
streamProc.pipeAttributes.lpSecurityDescriptor = NULL;
CreatePipe(&streamProc.stdinReadPipe,
&streamProc.stdinWritePipe,
&streamProc.pipeAttributes,
0);
SetHandleInformation(streamProc.stdinWritePipe,
HANDLE_FLAG_INHERIT,
0);
struct STARTUPINFOA startupInfo;
memset(&startupInfo, 0, sizeof(struct STARTUPINFOA));
startupInfo.cb = sizeof(struct STARTUPINFOA);
startupInfo.hStdInput = streamProc.stdinReadPipe;
startupInfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
startupInfo.wShowWindow = SW_HIDE;
struct PROCESS_INFORMATION procInfo;
memset(&procInfo, 0, sizeof(struct PROCESS_INFORMATION));
// Start the stream.
CreateProcessA(NULL,
cmd,
NULL,
NULL,
true,
0,
NULL,
NULL,
&startupInfo,
&procInfo);
// Allocate the frame buffer.
size_t buffer_size = 3 * width;
char *buffer = malloc(buffer_size);
// Generate some random noise frames.
srand(time(0));
for (int i = 0; i < N_FRAMES; i++) {
// Write the frame line by line.
for (int y = 0; y < height; y++) {
for (size_t byte = 0; byte < buffer_size; byte++)
buffer[byte] = rand() & 0xff;
// Write the frame data to the buffer.
DWORD bytesWritten = 0;
WriteFile(streamProc.stdinWritePipe,
buffer,
DWORD(buffer_size),
&bytesWritten,
NULL);
}
Sleep(1000 / FPS);
}
// Release the frame buffer.
malloc(buffer);
// Close the standard input and standard output handles.
CloseHandle(streamProc.stdinWritePipe);
CloseHandle(streamProc.stdinReadPipe);
// Stop the stream.
WaitForSingleObject(streamProc.procInfo.hProcess, INFINITE);
CloseHandle(streamProc.procInfo.hProcess);
CloseHandle(streamProc.procInfo.hThread);
return 0;
}