mirror of
https://github.com/mpv-player/mpv
synced 2024-12-22 06:42:03 +00:00
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
#include <pthread.h>
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#include <stdio.h>
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#include <windows.h>
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#include <io.h>
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#include <stdint.h>
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#include <waio/waio.h>
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#include "common/msg.h"
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#include "osdep/io.h"
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#include "input.h"
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static void request_cancel(struct mp_input_src *src)
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{
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HANDLE terminate = src->priv;
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MP_VERBOSE(src, "Exiting...\n");
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SetEvent(terminate);
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}
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static void uninit(struct mp_input_src *src)
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{
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HANDLE terminate = src->priv;
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CloseHandle(terminate);
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MP_VERBOSE(src, "Exited.\n");
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}
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static void read_pipe_thread(struct mp_input_src *src, void *param)
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{
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char *filename = talloc_strdup(src, param);
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struct waio_cx_interface *waio = NULL;
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int mode = O_RDONLY;
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int fd = -1;
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bool close_fd = true;
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if (strcmp(filename, "/dev/stdin") == 0) { // for symmetry with unix
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fd = STDIN_FILENO;
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close_fd = false;
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}
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if (fd < 0)
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fd = open(filename, mode);
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if (fd < 0) {
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MP_ERR(src, "Can't open %s.\n", filename);
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goto done;
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}
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// If we're reading from stdin, unset it. All I/O on synchronous handles is
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// serialized, so stupid DLLs that call GetFileType on stdin can hang the
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// process if they do it while we're reading from it. At least, the
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// VirtualBox OpenGL ICD is affected by this, but only on Windows XP.
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// GetFileType works differently in later versions of Windows. See:
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// https://support.microsoft.com/kb/2009703
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// http://blogs.msdn.com/b/oldnewthing/archive/2011/12/02/10243553.aspx
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if ((void*)_get_osfhandle(fd) == GetStdHandle(STD_INPUT_HANDLE))
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SetStdHandle(STD_INPUT_HANDLE, NULL);
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waio = waio_alloc((void *)_get_osfhandle(fd), 0, NULL, NULL);
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if (!waio) {
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MP_ERR(src, "Can't initialize win32 file reader.\n");
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goto done;
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}
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HANDLE terminate = CreateEvent(NULL, TRUE, FALSE, NULL);
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if (!terminate)
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goto done;
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src->priv = terminate;
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src->cancel = request_cancel;
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src->uninit = uninit;
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mp_input_src_init_done(src);
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char buffer[128];
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struct waio_aiocb cb = {
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.aio_buf = buffer,
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.aio_nbytes = sizeof(buffer),
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.hsignal = terminate,
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};
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while (1) {
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if (waio_read(waio, &cb)) {
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MP_ERR(src, "Read operation failed.\n");
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break;
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}
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if (waio_suspend(waio, (const struct waio_aiocb *[]){&cb}, 1, NULL))
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break;
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ssize_t r = waio_return(waio, &cb);
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if (r <= 0)
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break; // EOF or error
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mp_input_src_feed_cmd_text(src, buffer, r);
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}
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done:
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waio_free(waio);
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if (close_fd)
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close(fd);
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}
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void mp_input_pipe_add(struct input_ctx *ictx, const char *filename)
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{
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mp_input_add_thread_src(ictx, (void *)filename, read_pipe_thread);
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}
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