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v4l2-input.c
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v4l2-input.c
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/*
Copyright (C) 2014 by Leonhard Oelke <[email protected]>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <inttypes.h>
#include <fcntl.h>
#include <dirent.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <linux/videodev2.h>
#include <libv4l2.h>
#include <util/threading.h>
#include <util/bmem.h>
#include <util/dstr.h>
#include <util/platform.h>
#include <obs-module.h>
#include "v4l2-controls.h"
#include "v4l2-helpers.h"
#if HAVE_UDEV
#include "v4l2-udev.h"
#endif
/* The new dv timing api was introduced in Linux 3.4
* Currently we simply disable dv timings when this is not defined */
#if !defined(VIDIOC_ENUM_DV_TIMINGS) || !defined(V4L2_IN_CAP_DV_TIMINGS)
#define V4L2_IN_CAP_DV_TIMINGS 0
#endif
#define V4L2_DATA(voidptr) struct v4l2_data *data = voidptr;
#define timeval2ns(tv) \
(((uint64_t)tv.tv_sec * 1000000000) + ((uint64_t)tv.tv_usec * 1000))
#define V4L2_FOURCC_STR(code) \
(char[5]) \
{ \
code & 0xFF, (code >> 8) & 0xFF, (code >> 16) & 0xFF, \
(code >> 24) & 0xFF, 0 \
}
#define blog(level, msg, ...) blog(level, "v4l2-input: " msg, ##__VA_ARGS__)
/**
* Data structure for the v4l2 source
*/
struct v4l2_data {
/* settings */
char *device_id;
int input;
int pixfmt;
int standard;
int dv_timing;
int resolution;
int framerate;
int color_range;
/* internal data */
obs_source_t *source;
pthread_t thread;
os_event_t *event;
bool framerate_unchanged;
bool resolution_unchanged;
int_fast32_t dev;
int width;
int height;
int linesize;
struct v4l2_buffer_data buffers;
bool auto_reset;
int timeout_frames;
};
/* forward declarations */
static void v4l2_init(struct v4l2_data *data);
static void v4l2_terminate(struct v4l2_data *data);
static void v4l2_update(void *vptr, obs_data_t *settings);
/**
* Prepare the output frame structure for obs and compute plane offsets
*
* Basically all data apart from memory pointers and the timestamp is known
* before the capture starts. This function prepares the obs_source_frame
* struct with all the data that is already known.
*
* v4l2 uses a continuous memory segment for all planes so we simply compute
* offsets to add to the start address in order to give obs the correct data
* pointers for the individual planes.
*/
static void v4l2_prep_obs_frame(struct v4l2_data *data,
struct obs_source_frame *frame,
size_t *plane_offsets)
{
memset(frame, 0, sizeof(struct obs_source_frame));
memset(plane_offsets, 0, sizeof(size_t) * MAX_AV_PLANES);
frame->width = data->width;
frame->height = data->height;
frame->format = v4l2_to_obs_video_format(data->pixfmt);
video_format_get_parameters(VIDEO_CS_DEFAULT, data->color_range,
frame->color_matrix, frame->color_range_min,
frame->color_range_max);
switch (data->pixfmt) {
case V4L2_PIX_FMT_NV12:
frame->linesize[0] = data->linesize;
frame->linesize[1] = data->linesize;
plane_offsets[1] = data->linesize * data->height;
break;
case V4L2_PIX_FMT_YVU420:
frame->linesize[0] = data->linesize;
frame->linesize[1] = data->linesize / 2;
frame->linesize[2] = data->linesize / 2;
plane_offsets[1] = data->linesize * data->height * 5 / 4;
plane_offsets[2] = data->linesize * data->height;
break;
case V4L2_PIX_FMT_YUV420:
frame->linesize[0] = data->linesize;
frame->linesize[1] = data->linesize / 2;
frame->linesize[2] = data->linesize / 2;
plane_offsets[1] = data->linesize * data->height;
plane_offsets[2] = data->linesize * data->height * 5 / 4;
break;
default:
frame->linesize[0] = data->linesize;
break;
}
}
/*
* Worker thread to get video data
*/
static void *v4l2_thread(void *vptr)
{
V4L2_DATA(vptr);
int r;
fd_set fds;
uint8_t *start;
uint64_t frames;
uint64_t first_ts;
struct timeval tv;
struct v4l2_buffer buf;
struct obs_source_frame out;
size_t plane_offsets[MAX_AV_PLANES];
int fps_num, fps_denom;
float ffps;
uint64_t timeout_usec;
blog(LOG_DEBUG, "%s: new capture thread", data->device_id);
os_set_thread_name("v4l2: capture");
/* Get framerate and calculate appropriate select timeout value. */
v4l2_unpack_tuple(&fps_num, &fps_denom, data->framerate);
ffps = (float)fps_denom / fps_num;
blog(LOG_DEBUG, "%s: framerate: %.2f fps", data->device_id, ffps);
/* Timeout set to 5 frame periods. */
timeout_usec = (1000000 * data->timeout_frames) / ffps;
blog(LOG_INFO, "%s: select timeout set to %ldus (%dx frame periods)",
data->device_id, timeout_usec, data->timeout_frames);
if (v4l2_start_capture(data->dev, &data->buffers) < 0)
goto exit;
blog(LOG_DEBUG, "%s: new capture started", data->device_id);
frames = 0;
first_ts = 0;
v4l2_prep_obs_frame(data, &out, plane_offsets);
blog(LOG_DEBUG, "%s: obs frame prepared", data->device_id);
while (os_event_try(data->event) == EAGAIN) {
FD_ZERO(&fds);
FD_SET(data->dev, &fds);
/* Set timeout timevalue. */
tv.tv_sec = 0;
tv.tv_usec = timeout_usec;
r = select(data->dev + 1, &fds, NULL, NULL, &tv);
if (r < 0) {
if (errno == EINTR)
continue;
blog(LOG_ERROR, "%s: select failed", data->device_id);
break;
} else if (r == 0) {
blog(LOG_ERROR, "%s: select timed out",
data->device_id);
#ifdef _DEBUG
v4l2_query_all_buffers(data->dev, &data->buffers);
#endif
if (v4l2_ioctl(data->dev, VIDIOC_LOG_STATUS) < 0) {
blog(LOG_ERROR, "%s: failed to log status",
data->device_id);
}
if (data->auto_reset) {
if (v4l2_reset_capture(data->dev,
&data->buffers) == 0)
blog(LOG_INFO,
"%s: stream reset successful",
data->device_id);
else
blog(LOG_ERROR, "%s: failed to reset",
data->device_id);
}
continue;
}
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
if (v4l2_ioctl(data->dev, VIDIOC_DQBUF, &buf) < 0) {
if (errno == EAGAIN) {
blog(LOG_DEBUG, "%s: ioctl dqbuf eagain",
data->device_id);
continue;
}
blog(LOG_ERROR, "%s: failed to dequeue buffer",
data->device_id);
break;
}
blog(LOG_DEBUG,
"%s: ts: %06ld buf id #%d, flags 0x%08X, seq #%d, len %d, used %d",
data->device_id, buf.timestamp.tv_usec, buf.index,
buf.flags, buf.sequence, buf.length, buf.bytesused);
out.timestamp = timeval2ns(buf.timestamp);
if (!frames)
first_ts = out.timestamp;
out.timestamp -= first_ts;
start = (uint8_t *)data->buffers.info[buf.index].start;
for (uint_fast32_t i = 0; i < MAX_AV_PLANES; ++i)
out.data[i] = start + plane_offsets[i];
obs_source_output_video(data->source, &out);
if (v4l2_ioctl(data->dev, VIDIOC_QBUF, &buf) < 0) {
blog(LOG_ERROR, "%s: failed to enqueue buffer",
data->device_id);
break;
}
frames++;
}
blog(LOG_INFO, "%s: Stopped capture after %" PRIu64 " frames",
data->device_id, frames);
exit:
v4l2_stop_capture(data->dev);
return NULL;
}
static const char *v4l2_getname(void *unused)
{
UNUSED_PARAMETER(unused);
return obs_module_text("V4L2Input");
}
static void v4l2_defaults(obs_data_t *settings)
{
obs_data_set_default_int(settings, "input", -1);
obs_data_set_default_int(settings, "pixelformat", -1);
obs_data_set_default_int(settings, "standard", -1);
obs_data_set_default_int(settings, "dv_timing", -1);
obs_data_set_default_int(settings, "resolution", -1);
obs_data_set_default_int(settings, "framerate", -1);
obs_data_set_default_int(settings, "color_range", VIDEO_RANGE_DEFAULT);
obs_data_set_default_bool(settings, "buffering", true);
obs_data_set_default_bool(settings, "auto_reset", false);
obs_data_set_default_int(settings, "timeout_frames", 5);
}
/**
* Enable/Disable all properties for the source.
*
* @note A property that should be ignored can be specified
*
* @param props the source properties
* @param ignore ignore this property
* @param enable enable/disable all properties
*/
static void v4l2_props_set_enabled(obs_properties_t *props,
obs_property_t *ignore, bool enable)
{
if (!props)
return;
for (obs_property_t *prop = obs_properties_first(props); prop != NULL;
obs_property_next(&prop)) {
if (prop == ignore)
continue;
obs_property_set_enabled(prop, enable);
}
}
/*
* List available devices
*/
static void v4l2_device_list(obs_property_t *prop, obs_data_t *settings)
{
DIR *dirp;
struct dirent *dp;
struct dstr device;
bool cur_device_found;
size_t cur_device_index;
const char *cur_device_name;
#ifdef __FreeBSD__
dirp = opendir("/dev");
#else
dirp = opendir("/sys/class/video4linux");
#endif
if (!dirp)
return;
cur_device_found = false;
cur_device_name = obs_data_get_string(settings, "device_id");
obs_property_list_clear(prop);
dstr_init_copy(&device, "/dev/");
while ((dp = readdir(dirp)) != NULL) {
int fd;
uint32_t caps;
struct v4l2_capability video_cap;
#ifdef __FreeBSD__
if (strstr(dp->d_name, "video") == NULL)
continue;
#endif
if (dp->d_type == DT_DIR)
continue;
dstr_resize(&device, 5);
dstr_cat(&device, dp->d_name);
if ((fd = v4l2_open(device.array, O_RDWR | O_NONBLOCK)) == -1) {
blog(LOG_INFO, "Unable to open %s", device.array);
continue;
}
if (v4l2_ioctl(fd, VIDIOC_QUERYCAP, &video_cap) == -1) {
blog(LOG_INFO, "Failed to query capabilities for %s",
device.array);
v4l2_close(fd);
continue;
}
#ifndef V4L2_CAP_DEVICE_CAPS
caps = video_cap.capabilities;
#else
/* ... since Linux 3.3 */
caps = (video_cap.capabilities & V4L2_CAP_DEVICE_CAPS)
? video_cap.device_caps
: video_cap.capabilities;
#endif
if (!(caps & V4L2_CAP_VIDEO_CAPTURE)) {
blog(LOG_INFO, "%s seems to not support video capture",
device.array);
v4l2_close(fd);
continue;
}
/* make sure device names are unique */
char unique_device_name[68];
sprintf(unique_device_name, "%s (%s)", video_cap.card,
video_cap.bus_info);
obs_property_list_add_string(prop, unique_device_name,
device.array);
blog(LOG_INFO, "Found device '%s' at %s", video_cap.card,
device.array);
/* check if this is the currently used device */
if (cur_device_name && !strcmp(cur_device_name, device.array))
cur_device_found = true;
v4l2_close(fd);
}
/* add currently selected device if not present, but disable it ... */
if (!cur_device_found && cur_device_name && strlen(cur_device_name)) {
cur_device_index = obs_property_list_add_string(
prop, cur_device_name, cur_device_name);
obs_property_list_item_disable(prop, cur_device_index, true);
}
closedir(dirp);
dstr_free(&device);
}
/*
* List inputs for device
*/
static void v4l2_input_list(int_fast32_t dev, obs_property_t *prop)
{
struct v4l2_input in;
memset(&in, 0, sizeof(in));
obs_property_list_clear(prop);
while (v4l2_ioctl(dev, VIDIOC_ENUMINPUT, &in) == 0) {
obs_property_list_add_int(prop, (char *)in.name, in.index);
blog(LOG_INFO, "Found input '%s' (Index %d)", in.name,
in.index);
in.index++;
}
}
/*
* List formats for device
*/
static void v4l2_format_list(int dev, obs_property_t *prop)
{
struct v4l2_fmtdesc fmt;
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.index = 0;
struct dstr buffer;
dstr_init(&buffer);
obs_property_list_clear(prop);
while (v4l2_ioctl(dev, VIDIOC_ENUM_FMT, &fmt) == 0) {
dstr_copy(&buffer, (char *)fmt.description);
if (fmt.flags & V4L2_FMT_FLAG_EMULATED)
dstr_cat(&buffer, " (Emulated)");
if (v4l2_to_obs_video_format(fmt.pixelformat) !=
VIDEO_FORMAT_NONE) {
obs_property_list_add_int(prop, buffer.array,
fmt.pixelformat);
blog(LOG_INFO, "Pixelformat: %s (available)",
buffer.array);
} else {
blog(LOG_INFO, "Pixelformat: %s (unavailable)",
buffer.array);
}
fmt.index++;
}
dstr_free(&buffer);
}
/*
* List video standards for the device
*/
static void v4l2_standard_list(int dev, obs_property_t *prop)
{
struct v4l2_standard std;
std.index = 0;
obs_property_list_clear(prop);
obs_property_list_add_int(prop, obs_module_text("LeaveUnchanged"), -1);
while (v4l2_ioctl(dev, VIDIOC_ENUMSTD, &std) == 0) {
obs_property_list_add_int(prop, (char *)std.name, std.id);
std.index++;
}
}
/*
* List dv timings for the device
*/
static void v4l2_dv_timing_list(int dev, obs_property_t *prop)
{
struct v4l2_dv_timings dvt;
struct dstr buf;
int index = 0;
dstr_init(&buf);
obs_property_list_clear(prop);
obs_property_list_add_int(prop, obs_module_text("LeaveUnchanged"), -1);
while (v4l2_enum_dv_timing(dev, &dvt, index) == 0) {
/* i do not pretend to understand, this is from qv4l2 ... */
double h = (double)dvt.bt.height + dvt.bt.vfrontporch +
dvt.bt.vsync + dvt.bt.vbackporch +
dvt.bt.il_vfrontporch + dvt.bt.il_vsync +
dvt.bt.il_vbackporch;
double w = (double)dvt.bt.width + dvt.bt.hfrontporch +
dvt.bt.hsync + dvt.bt.hbackporch;
double i = (dvt.bt.interlaced) ? 2.0f : 1.0f;
double rate = (double)dvt.bt.pixelclock / (w * (h / i));
dstr_printf(&buf, "%ux%u%c %.2f", dvt.bt.width, dvt.bt.height,
(dvt.bt.interlaced) ? 'i' : 'p', rate);
obs_property_list_add_int(prop, buf.array, index);
index++;
}
dstr_free(&buf);
}
/*
* List resolutions for device and format
*/
static void v4l2_resolution_list(int dev, uint_fast32_t pixelformat,
obs_property_t *prop)
{
struct v4l2_frmsizeenum frmsize;
frmsize.pixel_format = pixelformat;
frmsize.index = 0;
struct dstr buffer;
dstr_init(&buffer);
obs_property_list_clear(prop);
obs_property_list_add_int(prop, obs_module_text("LeaveUnchanged"), -1);
v4l2_ioctl(dev, VIDIOC_ENUM_FRAMESIZES, &frmsize);
switch (frmsize.type) {
case V4L2_FRMSIZE_TYPE_DISCRETE:
while (v4l2_ioctl(dev, VIDIOC_ENUM_FRAMESIZES, &frmsize) == 0) {
dstr_printf(&buffer, "%dx%d", frmsize.discrete.width,
frmsize.discrete.height);
obs_property_list_add_int(
prop, buffer.array,
v4l2_pack_tuple(frmsize.discrete.width,
frmsize.discrete.height));
frmsize.index++;
}
break;
default:
blog(LOG_INFO, "Stepwise and Continuous framesizes "
"are currently hardcoded");
for (const int *packed = v4l2_framesizes; *packed; ++packed) {
int width;
int height;
v4l2_unpack_tuple(&width, &height, *packed);
dstr_printf(&buffer, "%dx%d", width, height);
obs_property_list_add_int(prop, buffer.array, *packed);
}
break;
}
dstr_free(&buffer);
}
/*
* List framerates for device and resolution
*/
static void v4l2_framerate_list(int dev, uint_fast32_t pixelformat,
uint_fast32_t width, uint_fast32_t height,
obs_property_t *prop)
{
struct v4l2_frmivalenum frmival;
frmival.pixel_format = pixelformat;
frmival.width = width;
frmival.height = height;
frmival.index = 0;
struct dstr buffer;
dstr_init(&buffer);
obs_property_list_clear(prop);
obs_property_list_add_int(prop, obs_module_text("LeaveUnchanged"), -1);
v4l2_ioctl(dev, VIDIOC_ENUM_FRAMEINTERVALS, &frmival);
switch (frmival.type) {
case V4L2_FRMIVAL_TYPE_DISCRETE:
while (v4l2_ioctl(dev, VIDIOC_ENUM_FRAMEINTERVALS, &frmival) ==
0) {
float fps = (float)frmival.discrete.denominator /
frmival.discrete.numerator;
int pack =
v4l2_pack_tuple(frmival.discrete.numerator,
frmival.discrete.denominator);
dstr_printf(&buffer, "%.2f", fps);
obs_property_list_add_int(prop, buffer.array, pack);
frmival.index++;
}
break;
default:
blog(LOG_INFO, "Stepwise and Continuous framerates "
"are currently hardcoded");
for (const int *packed = v4l2_framerates; *packed; ++packed) {
int num;
int denom;
v4l2_unpack_tuple(&num, &denom, *packed);
float fps = (float)denom / num;
dstr_printf(&buffer, "%.2f", fps);
obs_property_list_add_int(prop, buffer.array, *packed);
}
break;
}
dstr_free(&buffer);
}
/*
* Device selected callback
*/
static bool device_selected(obs_properties_t *props, obs_property_t *p,
obs_data_t *settings)
{
int dev = v4l2_open(obs_data_get_string(settings, "device_id"),
O_RDWR | O_NONBLOCK);
v4l2_props_set_enabled(props, p, (dev == -1) ? false : true);
if (dev == -1)
return false;
obs_property_t *prop = obs_properties_get(props, "input");
obs_properties_t *ctrl_props_new = obs_properties_create();
obs_properties_remove_by_name(props, "controls");
v4l2_input_list(dev, prop);
v4l2_update_controls(dev, ctrl_props_new, settings);
v4l2_close(dev);
obs_properties_add_group(props, "controls",
obs_module_text("CameraCtrls"),
OBS_GROUP_NORMAL, ctrl_props_new);
obs_property_modified(prop, settings);
return true;
}
/*
* Input selected callback
*/
static bool input_selected(obs_properties_t *props, obs_property_t *p,
obs_data_t *settings)
{
UNUSED_PARAMETER(p);
int dev = v4l2_open(obs_data_get_string(settings, "device_id"),
O_RDWR | O_NONBLOCK);
if (dev == -1)
return false;
obs_property_t *prop = obs_properties_get(props, "pixelformat");
v4l2_format_list(dev, prop);
v4l2_close(dev);
obs_property_modified(prop, settings);
return true;
}
/*
* Format selected callback
*/
static bool format_selected(obs_properties_t *props, obs_property_t *p,
obs_data_t *settings)
{
UNUSED_PARAMETER(p);
int dev = v4l2_open(obs_data_get_string(settings, "device_id"),
O_RDWR | O_NONBLOCK);
if (dev == -1)
return false;
int input = (int)obs_data_get_int(settings, "input");
uint32_t caps = 0;
if (v4l2_get_input_caps(dev, input, &caps) < 0)
return false;
caps &= V4L2_IN_CAP_STD | V4L2_IN_CAP_DV_TIMINGS;
obs_property_t *resolution = obs_properties_get(props, "resolution");
obs_property_t *framerate = obs_properties_get(props, "framerate");
obs_property_t *standard = obs_properties_get(props, "standard");
obs_property_t *dv_timing = obs_properties_get(props, "dv_timing");
obs_property_set_visible(resolution, (!caps) ? true : false);
obs_property_set_visible(framerate, (!caps) ? true : false);
obs_property_set_visible(standard,
(caps & V4L2_IN_CAP_STD) ? true : false);
obs_property_set_visible(
dv_timing, (caps & V4L2_IN_CAP_DV_TIMINGS) ? true : false);
if (!caps) {
v4l2_resolution_list(dev,
obs_data_get_int(settings, "pixelformat"),
resolution);
}
if (caps & V4L2_IN_CAP_STD)
v4l2_standard_list(dev, standard);
if (caps & V4L2_IN_CAP_DV_TIMINGS)
v4l2_dv_timing_list(dev, dv_timing);
v4l2_close(dev);
if (!caps)
obs_property_modified(resolution, settings);
if (caps & V4L2_IN_CAP_STD)
obs_property_modified(standard, settings);
if (caps & V4L2_IN_CAP_DV_TIMINGS)
obs_property_modified(dv_timing, settings);
return true;
}
/*
* Resolution selected callback
*/
static bool resolution_selected(obs_properties_t *props, obs_property_t *p,
obs_data_t *settings)
{
UNUSED_PARAMETER(p);
int width, height;
int dev = v4l2_open(obs_data_get_string(settings, "device_id"),
O_RDWR | O_NONBLOCK);
if (dev == -1)
return false;
obs_property_t *prop = obs_properties_get(props, "framerate");
v4l2_unpack_tuple(&width, &height,
obs_data_get_int(settings, "resolution"));
v4l2_framerate_list(dev, obs_data_get_int(settings, "pixelformat"),
width, height, prop);
v4l2_close(dev);
obs_property_modified(prop, settings);
return true;
}
#if HAVE_UDEV
/**
* Device added callback
*
* If everything went fine we can start capturing again when the device is
* reconnected
*/
static void device_added(void *vptr, calldata_t *calldata)
{
V4L2_DATA(vptr);
obs_source_update_properties(data->source);
const char *dev;
calldata_get_string(calldata, "device", &dev);
if (strcmp(data->device_id, dev))
return;
blog(LOG_INFO, "Device %s reconnected", dev);
v4l2_init(data);
}
/**
* Device removed callback
*
* We stop recording here so we don't block the device node
*/
static void device_removed(void *vptr, calldata_t *calldata)
{
V4L2_DATA(vptr);
obs_source_update_properties(data->source);
const char *dev;
calldata_get_string(calldata, "device", &dev);
if (strcmp(data->device_id, dev))
return;
blog(LOG_INFO, "Device %s disconnected", dev);
v4l2_terminate(data);
}
#endif
static obs_properties_t *v4l2_properties(void *vptr)
{
V4L2_DATA(vptr);
obs_properties_t *props = obs_properties_create();
obs_property_t *device_list = obs_properties_add_list(
props, "device_id", obs_module_text("Device"),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_t *input_list = obs_properties_add_list(
props, "input", obs_module_text("Input"), OBS_COMBO_TYPE_LIST,
OBS_COMBO_FORMAT_INT);
obs_property_t *format_list = obs_properties_add_list(
props, "pixelformat", obs_module_text("VideoFormat"),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_property_t *standard_list = obs_properties_add_list(
props, "standard", obs_module_text("VideoStandard"),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_property_set_visible(standard_list, false);
obs_property_t *dv_timing_list = obs_properties_add_list(
props, "dv_timing", obs_module_text("DVTiming"),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_property_set_visible(dv_timing_list, false);
obs_property_t *resolution_list = obs_properties_add_list(
props, "resolution", obs_module_text("Resolution"),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_properties_add_list(props, "framerate",
obs_module_text("FrameRate"),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_property_t *color_range_list = obs_properties_add_list(
props, "color_range", obs_module_text("ColorRange"),
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_INT);
obs_property_list_add_int(color_range_list,
obs_module_text("ColorRange.Default"),
VIDEO_RANGE_DEFAULT);
obs_property_list_add_int(color_range_list,
obs_module_text("ColorRange.Partial"),
VIDEO_RANGE_PARTIAL);
obs_property_list_add_int(color_range_list,
obs_module_text("ColorRange.Full"),
VIDEO_RANGE_FULL);
obs_properties_add_bool(props, "buffering",
obs_module_text("UseBuffering"));
obs_properties_add_bool(props, "auto_reset",
obs_module_text("AutoresetOnTimeout"));
obs_properties_add_int(props, "timeout_frames",
obs_module_text("FramesUntilTimeout"), 2, 120,
1);
// a group to contain the camera control
obs_properties_t *ctrl_props = obs_properties_create();
obs_properties_add_group(props, "controls",
obs_module_text("CameraCtrls"),
OBS_GROUP_NORMAL, ctrl_props);
obs_data_t *settings = obs_source_get_settings(data->source);
v4l2_device_list(device_list, settings);
obs_data_release(settings);
obs_property_set_modified_callback(device_list, device_selected);
obs_property_set_modified_callback(input_list, input_selected);
obs_property_set_modified_callback(format_list, format_selected);
obs_property_set_modified_callback(resolution_list,
resolution_selected);
return props;
}
static void v4l2_terminate(struct v4l2_data *data)
{
if (data->thread) {
os_event_signal(data->event);
pthread_join(data->thread, NULL);
os_event_destroy(data->event);
data->thread = 0;
}
v4l2_destroy_mmap(&data->buffers);
if (data->dev != -1) {
v4l2_close(data->dev);
data->dev = -1;
}
}
static void v4l2_destroy(void *vptr)
{
V4L2_DATA(vptr);
if (!data)
return;
v4l2_terminate(data);
if (data->device_id)
bfree(data->device_id);
#if HAVE_UDEV
signal_handler_t *sh = v4l2_get_udev_signalhandler();
signal_handler_disconnect(sh, "device_added", device_added, data);
signal_handler_disconnect(sh, "device_removed", device_removed, data);
v4l2_unref_udev();
#endif
bfree(data);
}
/**
* Initialize the v4l2 device
*
* This function:
* - tries to open the device
* - sets pixelformat and requested resolution
* - sets the requested framerate
* - maps the buffers
* - starts the capture thread
*/
static void v4l2_init(struct v4l2_data *data)
{
uint32_t input_caps;
int fps_num, fps_denom;
blog(LOG_INFO, "Start capture from %s", data->device_id);
data->dev = v4l2_open(data->device_id, O_RDWR | O_NONBLOCK);
if (data->dev == -1) {
blog(LOG_ERROR, "Unable to open device");
goto fail;
}
/* set input */
if (v4l2_set_input(data->dev, &data->input) < 0) {
blog(LOG_ERROR, "Unable to set input %d", data->input);
goto fail;
}
blog(LOG_INFO, "Input: %d", data->input);
if (v4l2_get_input_caps(data->dev, -1, &input_caps) < 0) {
blog(LOG_ERROR, "Unable to get input capabilities");
goto fail;
}
/* set video standard if supported */
if (input_caps & V4L2_IN_CAP_STD) {
if (v4l2_set_standard(data->dev, &data->standard) < 0) {
blog(LOG_ERROR, "Unable to set video standard");
goto fail;
}
data->resolution = -1;
data->framerate = -1;
}
/* set dv timing if supported */
if (input_caps & V4L2_IN_CAP_DV_TIMINGS) {
if (v4l2_set_dv_timing(data->dev, &data->dv_timing) < 0) {
blog(LOG_ERROR, "Unable to set dv timing");
goto fail;
}
data->resolution = -1;
data->framerate = -1;
}
/* set pixel format and resolution */
if (v4l2_set_format(data->dev, &data->resolution, &data->pixfmt,
&data->linesize) < 0) {
blog(LOG_ERROR, "Unable to set format");
goto fail;
}
if (v4l2_to_obs_video_format(data->pixfmt) == VIDEO_FORMAT_NONE) {
blog(LOG_ERROR, "Selected video format not supported");
goto fail;
}
v4l2_unpack_tuple(&data->width, &data->height, data->resolution);
blog(LOG_INFO, "Resolution: %dx%d", data->width, data->height);
blog(LOG_INFO, "Pixelformat: %s", V4L2_FOURCC_STR(data->pixfmt));
blog(LOG_INFO, "Linesize: %d Bytes", data->linesize);
/* set framerate */
if (v4l2_set_framerate(data->dev, &data->framerate) < 0) {
blog(LOG_ERROR, "Unable to set framerate");
goto fail;
}
v4l2_unpack_tuple(&fps_num, &fps_denom, data->framerate);
blog(LOG_INFO, "Framerate: %.2f fps", (float)fps_denom / fps_num);
/* map buffers */