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toxic/src/video_device.c

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/* video_device.c
*
*
* Copyright (C) 2014 Toxic All Rights Reserved.
*
* This file is part of Toxic.
*
* Toxic 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.
*
* Toxic 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 Toxic. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "video_device.h"
#include "video_call.h"
#include <sys/ioctl.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <vpx/vpx_image.h>
#ifdef __linux__
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <linux/videodev2.h>
#endif /* __linux__ */
#include "line_info.h"
#include "settings.h"
#include <errno.h>
#include <stdbool.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#define inline__ inline __attribute__((always_inline))
extern struct user_settings *user_settings;
struct VideoBuffer {
void *start;
size_t length;
};
typedef struct VideoDevice {
int fd; /* File descriptor of video device selected/opened */
VideoDataHandleCallback cb; /* Use this to handle data from input device usually */
void* cb_data; /* Data to be passed to callback */
int32_t friend_number; /* ToxAV friend number */
struct v4l2_format fmt;
struct VideoBuffer *buffers;
uint32_t n_buffers;
uint32_t ref_count;
int32_t selection;
pthread_mutex_t mutex[1];
uint16_t video_width;
uint16_t video_height;
vpx_image_t input;
Display *x_display;
Window x_window;
GC x_gc;
} VideoDevice;
const char *dvideo_device_names[2]; /* Default device */
const char *video_devices_names[2][MAX_DEVICES]; /* Container of available devices */
static int size[2]; /* Size of above containers */
VideoDevice *video_devices_running[2][MAX_DEVICES] = {{NULL}}; /* Running devices */
uint32_t primary_video_device[2]; /* Primary device */
#ifdef VIDEO
static ToxAV* av = NULL;
#endif /* VIDEO */
/* q_mutex */
#define lock pthread_mutex_lock(&video_mutex);
#define unlock pthread_mutex_unlock(&video_mutex);
pthread_mutex_t video_mutex;
bool video_thread_running = true,
video_thread_paused = true; /* Thread control */
void* video_thread_poll(void*);
static int xioctl(int fh, unsigned long request, void *arg)
{
int r;
do {
r = ioctl(fh, request, arg);
} while (-1 == r && EINTR == errno);
return r;
}
static void yuv420tobgr(uint16_t width, uint16_t height, const uint8_t *y,
const uint8_t *u, const uint8_t *v, unsigned int ystride,
unsigned int ustride, unsigned int vstride, uint8_t *out)
{
unsigned long int i, j;
for (i = 0; i < height; ++i) {
for (j = 0; j < width; ++j) {
uint8_t *point = out + 4 * ((i * width) + j);
int t_y = y[((i * ystride) + j)];
int t_u = u[(((i / 2) * ustride) + (j / 2))];
int t_v = v[(((i / 2) * vstride) + (j / 2))];
t_y = t_y < 16 ? 16 : t_y;
int r = (298 * (t_y - 16) + 409 * (t_v - 128) + 128) >> 8;
int g = (298 * (t_y - 16) - 100 * (t_u - 128) - 208 * (t_v - 128) + 128) >> 8;
int b = (298 * (t_y - 16) + 516 * (t_u - 128) + 128) >> 8;
point[2] = r>255? 255 : r<0 ? 0 : r;
point[1] = g>255? 255 : g<0 ? 0 : g;
point[0] = b>255? 255 : b<0 ? 0 : b;
point[3] = ~0;
}
}
}
static void yuv422to420(uint8_t *plane_y, uint8_t *plane_u, uint8_t *plane_v,
uint8_t *input, uint16_t width, uint16_t height)
{
uint8_t *end = input + width * height * 2;
while (input != end) {
uint8_t *line_end = input + width * 2;
while (input != line_end) {
*plane_y++ = *input++;
*plane_u++ = *input++;
*plane_y++ = *input++;
*plane_v++ = *input++;
}
line_end = input + width * 2;
while (input != line_end) {
*plane_y++ = *input++;
input++;//u
*plane_y++ = *input++;
input++;//v
}
}
}
/* Meet devices */
#ifdef VIDEO
VideoDeviceError init_video_devices(ToxAV* av_)
#else
VideoDeviceError init_video_devices()
#endif /* VIDEO */
{
size[vdt_input] = 0;
#ifdef __linux__
for (; size[vdt_input] <= MAX_DEVICES; ++size[vdt_input]) {
int fd;
char device_address[] = "/dev/videoXX";
snprintf(device_address + 10, sizeof(char) * strlen(device_address) - 10, "%i", size[vdt_input]);
fd = open(device_address, O_RDWR | O_NONBLOCK, 0);
if ( fd == -1 ) {
break;
} else {
struct v4l2_capability cap;
char* video_input_name;
/* Query V4L for capture capabilities */
if ( ioctl(fd, VIDIOC_QUERYCAP, &cap) != -1 ) {
//strcpy(video_input_name,cap.card);
video_input_name = cap.card;
} else {
video_input_name = device_address;
}
video_devices_names[vdt_input][size[vdt_input]] = video_input_name;
close(fd);
}
}
#else /* __OSX__ */
/* TODO: Add OSX implementation for listing input video devices */
#endif
size[vdt_output] = 1;
char* video_output_name = "Toxic Video Receiver";
video_devices_names[vdt_output][0] = video_output_name;
// Start poll thread
if ( pthread_mutex_init(&video_mutex, NULL) != 0 )
return vde_InternalError;
pthread_t thread_id;
if ( pthread_create(&thread_id, NULL, video_thread_poll, NULL) != 0 || pthread_detach(thread_id) != 0 )
return vde_InternalError;
#ifdef VIDEO
av = av_;
#endif /* VIDEO */
return (VideoDeviceError) vde_None;
}
VideoDeviceError terminate_video_devices()
{
/* Cleanup if needed */
video_thread_running = false;
usleep(20000);
if ( pthread_mutex_destroy(&video_mutex) != 0 )
return (VideoDeviceError) vde_InternalError;
return (VideoDeviceError) vde_None;
}
VideoDeviceError register_video_device_callback(int32_t friend_number, uint32_t device_idx,
VideoDataHandleCallback callback, void* data)
{
if ( size[vdt_input] <= device_idx || !video_devices_running[vdt_input][device_idx] || !video_devices_running[vdt_input][device_idx]->fd )
return vde_InvalidSelection;
lock;
video_devices_running[vdt_input][device_idx]->cb = callback;
video_devices_running[vdt_input][device_idx]->cb_data = data;
video_devices_running[vdt_input][device_idx]->friend_number = friend_number;
unlock;
return vde_None;
}
VideoDeviceError set_primary_video_device(VideoDeviceType type, int32_t selection)
{
if ( size[type] <= selection || selection < 0 ) return vde_InvalidSelection;
primary_video_device[type] = selection;
return vde_None;
}
VideoDeviceError open_primary_video_device(VideoDeviceType type, uint32_t* device_idx)
{
return open_video_device(type, primary_video_device[type], device_idx);
}
void get_primary_video_device_name(VideoDeviceType type, char *buf, int size)
{
memcpy(buf, dvideo_device_names[type], size);
}
VideoDeviceError open_video_device(VideoDeviceType type, int32_t selection, uint32_t* device_idx)
{
if ( size[type] <= selection || selection < 0 ) return vde_InvalidSelection;
lock;
uint32_t i;
for (i = 0; i < MAX_DEVICES && video_devices_running[type][i]; ++i);
if (i == MAX_DEVICES) { unlock; return vde_AllDevicesBusy; }
else *device_idx = i;
for (i = 0; i < MAX_DEVICES; i ++) { /* Check if any device has the same selection */
if ( video_devices_running[type][i] && video_devices_running[type][i]->selection == selection ) {
video_devices_running[type][*device_idx] = video_devices_running[type][i];
video_devices_running[type][i]->ref_count ++;
unlock;
return vde_None;
}
}
VideoDevice* device = video_devices_running[type][*device_idx] = calloc(1, sizeof(VideoDevice));
device->selection = selection;
if ( pthread_mutex_init(device->mutex, NULL) != 0 ) {
free(device);
unlock;
return vde_InternalError;
}
if ( type == vdt_input ) {
video_thread_paused = true;
#ifdef __linux__
/* Open selected device */
char device_address[] = "/dev/videoXX";
snprintf(device_address + 10 , sizeof(device_address) - 10, "%i", selection);
device->fd = open(device_address, O_RDWR);
if ( device->fd == -1 ) {
return vde_FailedStart;
}
/* Obtain video device capabilities */
struct v4l2_capability cap;
if ( -1 == xioctl(device->fd, VIDIOC_QUERYCAP, &cap) ) {
close(device->fd);
free(device);
return vde_FailedStart;
}
/* Setup video format */
struct v4l2_format fmt;
memset(&(fmt), 0, sizeof(fmt));
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
if( -1 == xioctl(device->fd, VIDIOC_G_FMT, &fmt) ) {
close(device->fd);
free(device);
return vde_FailedStart;
}
device->video_width = fmt.fmt.pix.width;
device->video_height = fmt.fmt.pix.height;
/* Request buffers */
struct v4l2_requestbuffers req;
memset(&(req), 0, sizeof(req));
req.count = 4;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
if ( -1 == xioctl(device->fd, VIDIOC_REQBUFS, &req) ) {
close(device->fd);
free(device);
return vde_FailedStart;
}
if ( req.count < 2 ) {
close(device->fd);
free(device);
return vde_FailedStart;
}
device->buffers = calloc(req.count, sizeof(struct VideoBuffer));
for (i = 0; i < req.count; ++i) {
struct v4l2_buffer buf;
memset(&(buf), 0, sizeof(buf));
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
if ( -1 == xioctl(device->fd, VIDIOC_QUERYBUF, &buf) ) {
close(device->fd);
free(device);
return vde_FailedStart;
}
device->buffers[i].length = buf.length;
device->buffers[i].start = mmap(NULL /* start anywhere */,
buf.length,
PROT_READ | PROT_WRITE /* required */,
MAP_SHARED /* recommended */,
device->fd, buf.m.offset);
if ( MAP_FAILED == device->buffers[i].start ) {
for (i = 0; i < buf.index; ++i)
munmap(device->buffers[i].start, device->buffers[i].length);
close(device->fd);
free(device);
return vde_FailedStart;
}
}
device->n_buffers = i;
enum v4l2_buf_type type;
for (i = 0; i < device->n_buffers; ++i) {
struct v4l2_buffer buf;
memset(&(buf), 0, sizeof(buf));
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
if ( -1 == xioctl(device->fd, VIDIOC_QBUF, &buf) ) {
for (i = 0; i < device->n_buffers; ++i)
munmap(device->buffers[i].start, device->buffers[i].length);
close(device->fd);
free(device);
return vde_FailedStart;
}
}
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
/* Turn on video stream */
if ( -1 == xioctl(device->fd, VIDIOC_STREAMON, &type) ) {
close_video_device(vdt_input, *device_idx);
return vde_FailedStart;
}
#else /* __OSX__ */
/*TODO: Add OSX implementation of opening video devices */
#endif
/* Create X11 window associated to device */
if ( (device->x_display = XOpenDisplay(NULL)) == NULL ) {
close_video_device(vdt_input, *device_idx);
return vde_FailedStart;
}
int screen = DefaultScreen(device->x_display);
if ( !(device->x_window = XCreateSimpleWindow(device->x_display, RootWindow(device->x_display, screen), 0, 0,
device->video_width, device->video_height, 0, BlackPixel(device->x_display, screen),
BlackPixel(device->x_display, screen))) ) {
close_video_device(vdt_input, *device_idx);
return vde_FailedStart;
}
XStoreName(device->x_display, device->x_window, "Video Preview");
XSelectInput(device->x_display, device->x_window, ExposureMask|ButtonPressMask|KeyPressMask);
if ( (device->x_gc = DefaultGC(device->x_display, screen)) == NULL ) {
close_video_device(vdt_input, *device_idx);
return vde_FailedStart;
}
XMapWindow(device->x_display, device->x_window);
XClearWindow(device->x_display, device->x_window);
XMapRaised(device->x_display, device->x_window);
XFlush(device->x_display);
vpx_img_alloc(&device->input, VPX_IMG_FMT_I420, device->video_width, device->video_height, 1);
video_thread_paused = false;
} else { /* vdt_output */
/* Create X11 window associated to device */
if ( (device->x_display = XOpenDisplay(NULL)) == NULL ) {
close_video_device(vdt_output, *device_idx);
return vde_FailedStart;
}
int screen = DefaultScreen(device->x_display);
if ( !(device->x_window = XCreateSimpleWindow(device->x_display, RootWindow(device->x_display, screen), 0, 0,
100, 100, 0, BlackPixel(device->x_display, screen), BlackPixel(device->x_display, screen))) ) {
close_video_device(vdt_output, *device_idx);
return vde_FailedStart;
}
XStoreName(device->x_display, device->x_window, "Video Receive");
XSelectInput(device->x_display, device->x_window, ExposureMask|ButtonPressMask|KeyPressMask);
if ( (device->x_gc = DefaultGC(device->x_display, screen)) == NULL ) {
close_video_device(vdt_output, *device_idx);
return vde_FailedStart;
}
XMapWindow(device->x_display, device->x_window);
XClearWindow(device->x_display, device->x_window);
XMapRaised(device->x_display, device->x_window);
XFlush(device->x_display);
vpx_img_alloc(&device->input, VPX_IMG_FMT_I420, device->video_width, device->video_height, 1);
}
unlock;
return vde_None;
}
__inline VideoDeviceError write_video_out(uint16_t width, uint16_t height,
uint8_t const *y, uint8_t const *u, uint8_t const *v,
int32_t ystride, int32_t ustride, int32_t vstride,
void *user_data)
{
VideoDevice* device = video_devices_running[vdt_output][0];
if ( !device ) return vde_DeviceNotActive;
if( !device->x_window ) return vde_DeviceNotActive;
pthread_mutex_lock(device->mutex);
/* Resize X11 window to correct size */
if ( device->video_width != width || device->video_height != height ) {
device->video_width = width;
device->video_height = height;
XResizeWindow(device->x_display, device->x_window, width, height);
vpx_img_free(&device->input);
vpx_img_alloc(&device->input, VPX_IMG_FMT_I420, width, height, 1);
}
/* Convert YUV420 data to BGR */
ystride = abs(ystride);
ustride = abs(ustride);
vstride = abs(vstride);
uint8_t *img_data = malloc(width * height * 4);
yuv420tobgr(width, height, y, u, v, ystride, ustride, vstride, img_data);
/* Allocate image data in X11 */
XImage image = {
.width = width,
.height = height,
.depth = 24,
.bits_per_pixel = 32,
.format = ZPixmap,
.byte_order = LSBFirst,
.bitmap_unit = 8,
.bitmap_bit_order = LSBFirst,
.bytes_per_line = width * 4,
.red_mask = 0xFF0000,
.green_mask = 0xFF00,
.blue_mask = 0xFF,
.data = (char*)img_data
};
/* Render image data */
Pixmap pixmap = XCreatePixmap(device->x_display, device->x_window, width, height, 24);
XPutImage(device->x_display, pixmap, device->x_gc, &image, 0, 0, 0, 0, width, height);
XCopyArea(device->x_display, pixmap, device->x_window, device->x_gc, 0, 0, width, height, 0, 0);
XFreePixmap(device->x_display, pixmap);
XFlush(device->x_display);
free(img_data);
pthread_mutex_unlock(device->mutex);
return vde_None;
}
void* video_thread_poll (void* arg) // TODO: maybe use thread for every input source
{
/*
* NOTE: We only need to poll input devices for data.
*/
(void)arg;
uint32_t i;
while (video_thread_running)
{
if ( video_thread_paused ) usleep(10000); /* Wait for unpause. */
else
{
for (i = 0; i < size[vdt_input]; ++i)
{
lock;
if ( video_devices_running[vdt_input][i] != NULL )
{
/* Obtain frame image data from device buffers */
VideoDevice* device = video_devices_running[vdt_input][i];
void *data;
uint16_t video_width;
uint16_t video_height;
uint8_t *y, *u, *v;
#ifdef __linux__
struct v4l2_buffer buf;
memset(&(buf), 0, sizeof(buf));
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
if ( -1 == ioctl(device->fd, VIDIOC_DQBUF, &buf) ) {
unlock;
continue;
}
data = (void*)device->buffers[buf.index].start;
video_width = device->video_width;
video_height = device->video_height;
y = device->input.planes[0];
u = device->input.planes[1];
v = device->input.planes[2];
#else /* __OSX__*/
#endif
/* Convert frame image data to YUV420 for ToxAV */
yuv422to420(y, u, v, data, video_width, video_height);
/* Send frame data to friend through ToxAV */
if ( device->cb )
device->cb(video_width, video_height, y, u, v, device->cb_data);
/* Convert YUV420 data to BGR */
uint8_t *img_data = malloc(video_width * video_height * 4);
yuv420tobgr(video_width, video_height, y, u, v,
video_width, video_width/2, video_width/2, img_data);
/* Allocate image data in X11 */
XImage image = {
.width = video_width,
.height = video_height,
.depth = 24,
.bits_per_pixel = 32,
.format = ZPixmap,
.byte_order = LSBFirst,
.bitmap_unit = 8,
.bitmap_bit_order = LSBFirst,
.bytes_per_line = video_width * 4,
.red_mask = 0xFF0000,
.green_mask = 0xFF00,
.blue_mask = 0xFF,
.data = (char*)img_data
};
/* Render image data */
Pixmap pixmap = XCreatePixmap(device->x_display, device->x_window, video_width, video_height, 24);
XPutImage(device->x_display, pixmap, device->x_gc, &image, 0, 0, 0, 0, video_width, video_height);
XCopyArea(device->x_display, pixmap, device->x_window, device->x_gc, 0, 0, video_width, video_height, 0, 0);
XFreePixmap(device->x_display, pixmap);
XFlush(device->x_display);
free(img_data);
if ( -1 == xioctl(device->fd, VIDIOC_QBUF, &buf) ) {
unlock;
continue;
}
}
unlock;
}
usleep(1000 * 1000 / 24);
}
}
pthread_exit(NULL);
}
VideoDeviceError close_video_device(VideoDeviceType type, uint32_t device_idx)
{
if ( device_idx >= MAX_DEVICES ) return vde_InvalidSelection;
lock;
VideoDevice *device = video_devices_running[type][device_idx];
VideoDeviceError rc = vde_None;
if ( !device ) {
unlock;
return vde_DeviceNotActive;
}
video_devices_running[type][device_idx] = NULL;
if ( !device->ref_count ) {
if ( type == vdt_input ) {
enum v4l2_buf_type buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if( -1 == xioctl(device->fd, VIDIOC_STREAMOFF, &buf_type) ) {}
int i;
for (i = 0; i < device->n_buffers; ++i) {
if ( -1 == munmap(device->buffers[i].start, device->buffers[i].length) ) {
}
}
close(device->fd);
vpx_img_free(&device->input);
XDestroyWindow(device->x_display, device->x_window);
XFlush(device->x_display);
XCloseDisplay(device->x_display);
pthread_mutex_destroy(device->mutex);
free(device->buffers);
free(device);
} else {
vpx_img_free(&device->input);
XDestroyWindow(device->x_display, device->x_window);
XFlush(device->x_display);
XCloseDisplay(device->x_display);
pthread_mutex_destroy(device->mutex);
free(device);
}
}
else device->ref_count--;
unlock;
return rc;
}
void print_video_devices(ToxWindow* self, VideoDeviceType type)
{
int i;
for (i = 0; i < size[type]; ++i)
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "%d: %s", i, video_devices_names[type][i]);
return;
}
VideoDeviceError video_selection_valid(VideoDeviceType type, int32_t selection)
{
return (size[type] <= selection || selection < 0) ? vde_InvalidSelection : vde_None;
}
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