How can i add c dll/s files to my vidusal studio c++ project? And then using a c function in the c++

[EDN Admin]

I have visual studio c# pro 2012 and i have downloaded for it the c++ Now i created a new project win32 console application of c++ type dll
Im not sure if i need to create a win32 console application win32 to make it type dll or not ? Tried to read the msdn and other documents but im not sure how to do it.
I have this function in c :static void video_encode_example(const char *filename)
{
AVCodec *codec;
AVCodecContext *c= NULL;
int i, out_size, size, x, y, outbuf_size;
FILE *f;
AVFrame *picture;
uint8_t *outbuf;

printf("Video encodingn");

/* find the mpeg1 video encoder */
codec = avcodec_find_encoder(CODEC_ID_MPEG1VIDEO);
if (!codec) {
fprintf(stderr, "codec not foundn");
exit(1);
}

c = avcodec_alloc_context3(codec);
picture= avcodec_alloc_frame();

/* put sample parameters */
c->bit_rate = 400000;
/* resolution must be a multiple of two */
c->width = 352;
c->height = 288;
/* frames per second */
c->time_base= (AVRational){1,25};
c->gop_size = 10; /* emit one intra frame every ten frames */
c->max_b_frames=1;
c->pix_fmt = PIX_FMT_YUV420P;

/* open it */
if (avcodec_open(c, codec) < 0) {
fprintf(stderr, "could not open codecn");
exit(1);
}

f = fopen(filename, "wb");
if (!f) {
fprintf(stderr, "could not open %sn", filename);
exit(1);
}

/* alloc image and output buffer */
outbuf_size = 100000;
outbuf = malloc(outbuf_size);

/* the image can be allocated by any means and av_image_alloc() is
* just the most convenient way if av_malloc() is to be used */
av_image_alloc(picture->data, picture->linesize,
c->width, c->height, c->pix_fmt, 1);

/* encode 1 second of video */
for(i=0;i<25;i++) {
fflush(stdout);
/* prepare a dummy image */
/* Y */
for(y=0;y<c->height;y++) {
for(x=0;x<c->width;x++) {
picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3;
}
}

/* Cb and Cr */
for(y=0;y<c->height/2;y++) {
for(x=0;x<c->width/2;x++) {
picture->data[1][y * picture->linesize[1] + x] = 128 + y + i * 2;
picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5;
}
}

/* encode the image */
out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
printf("encoding frame %3d (size=%5d)n", i, out_size);
fwrite(outbuf, 1, out_size, f);
}

/* get the delayed frames */
for(; out_size; i++) {
fflush(stdout);

out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL);
printf("write frame %3d (size=%5d)n", i, out_size);
fwrite(outbuf, 1, out_size, f);
}

/* add sequence end code to have a real mpeg file */
outbuf[0] = 0x00;
outbuf[1] = 0x00;
outbuf[2] = 0x01;
outbuf[3] = 0xb7;
fwrite(outbuf, 1, 4, f);
fclose(f);
free(outbuf);

avcodec_close(c);
av_free(c);
av_free(picture->data[0]);
av_free(picture);
printf("n");
}

What i want is to take this function to put it in my c++ project and compile it. So this function will work and will take effect in my c++ project.
So which and how do i create a new c++ project the right one ? Then how do i add to this project dll/s that i have already which i need for this function ? And where do i add this c function and how do i make that when i compile and run my c++ project the function will take effect and will work ?
In the end if it will all work i want to use the dll of my c++ project in my c# .net project i have.
Maybe someone may put here step by step instructions of how to do it and which things to do:

• 
  c++ project to make and how to set it ?
• 
  how to add dll/s to this c++ project ?
• 
  where to add and then how to use the c function so when i compile and run the c++ the function will work like in c# when im calling the function in the constructor ?
• 
  what to do to make the c++ to be dll file that can be use in c# .net project ?

I read the msdn documents and others but its not clear i didnt understand how to do it.

View the full article