// MPV test
//
// mpv stops responding after about 50 loadfile commands are written, however writefile can keep
// writing even after mpv stops responding to commands
// mpv starts responding after this program is forced to quit/the pipe disconnects
// If you open pipe, write, then close pipe every command, this problem does not occur.
//
// You can validate this behavior by opening mpv in command line mode with -v and seeing 
// that the output stops after some time. MPV wil still respond to keyboard commands though

#include <Windows.h>
#include "stdio.h"

int main()
{
	//const char command[] = "loadfile sdfasdfsadfasdfasdfc.mp3\n";		//doesn't matter if file doesn't exist
	const char command[] = "loadfile test.mp3\n";
	//const char command[] = "loadfile movie.mpg\n";

	HANDLE hPipe = CreateFile(L"\\\\.\\pipe\\mpvsocket", GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
	if (hPipe == INVALID_HANDLE_VALUE)
	{
		return 0;	//exit if can't create pipe
	}

	unsigned int total_bytes_written = 0;

	for (int i = 0; i < 1000; i++)
	{
		DWORD dwWritten;
		BOOL fSuccess = WriteFile(hPipe, command, sizeof(command)-1, &dwWritten, NULL);
		if (!fSuccess)
		{
			break; //exit if write fails
		}

		total_bytes_written += dwWritten;
		printf("%d: wrote %d bytes, total: %d\n", i, dwWritten, total_bytes_written);
		
		//FlushFileBuffers(hPipe);
		Sleep(300);	//timing doesn't seem to make any difference, just takes longer to cause the problem.
	}

	CloseHandle(hPipe);

    return 0;
}