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fswebcam.c
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/* fswebcam - Small and simple webcam for *nix */
/*============================================================*/
/* Copyright (C)2005-2014 Philip Heron <phil@sanslogic.co.uk> */
/* */
/* This program is distributed under the terms of the GNU */
/* General Public License, version 2. You may use, modify, */
/* and redistribute it under the terms of this license. A */
/* copy should be included with this source. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <getopt.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <locale.h>
#include <gd.h>
#include <errno.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "fswebcam.h"
#include "log.h"
#include "src.h"
#include "dec.h"
#include "effects.h"
#include "parse.h"
#define ALIGN_LEFT (0)
#define ALIGN_CENTER (1)
#define ALIGN_RIGHT (2)
#define NO_BANNER (0)
#define TOP_BANNER (1)
#define BOTTOM_BANNER (2)
#define FORMAT_JPEG (0)
#define FORMAT_PNG (1)
#define FORMAT_WEBP (2)
enum fswc_options {
OPT_VERSION = 128,
OPT_PID,
OPT_OFFSET,
OPT_COUNT,
OPT_LIST_INPUTS,
OPT_LIST_TUNERS,
OPT_LIST_FORMATS,
OPT_LIST_CONTROLS,
OPT_LIST_FRAMESIZES,
OPT_LIST_FRAMERATES,
OPT_BRIGHTNESS,
OPT_HUE,
OPT_COLOUR,
OPT_CONTRAST,
OPT_WHITENESS,
OPT_REVERT,
OPT_FLIP,
OPT_CROP,
OPT_SCALE,
OPT_ROTATE,
OPT_DEINTERLACE,
OPT_INVERT,
OPT_GREYSCALE,
OPT_SWAPCHANNELS,
OPT_NO_BANNER,
OPT_TOP_BANNER,
OPT_BOTTOM_BANNER,
OPT_BG_COLOUR,
OPT_BL_COLOUR,
OPT_FG_COLOUR,
OPT_FONT,
OPT_NO_SHADOW,
OPT_SHADOW,
OPT_TITLE,
OPT_NO_TITLE,
OPT_SUBTITLE,
OPT_NO_SUBTITLE,
OPT_TIMESTAMP,
OPT_NO_TIMESTAMP,
OPT_GMT,
OPT_INFO,
OPT_NO_INFO,
OPT_UNDERLAY,
OPT_NO_UNDERLAY,
OPT_OVERLAY,
OPT_NO_OVERLAY,
OPT_JPEG,
OPT_PNG,
OPT_WEBP,
OPT_SAVE,
OPT_EXEC,
OPT_DUMPFRAME,
OPT_FPS,
};
typedef struct {
/* List of options. */
char *opts;
const struct option *long_opts;
/* When reading from the command line. */
int opt_index;
/* When reading from a configuration file. */
char *filename;
FILE *f;
size_t line;
} fswc_getopt_t;
typedef struct {
uint16_t id;
char *options;
} fswebcam_job_t;
typedef struct {
/* General options. */
unsigned long loop;
signed long offset;
unsigned int count;
unsigned char background;
char *pidfile;
char *logfile;
char gmt;
/* Capture start time. */
time_t start;
/* Device options. */
char *device;
char *input;
unsigned char tuner;
unsigned long frequency;
unsigned long delay;
unsigned long timeout;
char use_read;
uint8_t list;
/* Image capture options. */
int width;
int height;
unsigned int frames;
unsigned int fps;
unsigned int skipframes;
int palette;
src_option_t **option;
char *dumpframe;
/* Job queue. */
uint8_t jobs;
fswebcam_job_t **job;
/* Banner options. */
char banner;
uint32_t bg_colour;
uint32_t bl_colour;
uint32_t fg_colour;
char *title;
char *subtitle;
char *timestamp;
char *info;
char *font;
int fontsize;
char shadow;
/* Overlay options. */
char *underlay;
char *overlay;
/* Output options. */
char *filename;
char format;
char compression;
} fswebcam_config_t;
volatile char received_sigusr1 = 0;
volatile char received_sighup = 0;
volatile char received_sigterm = 0;
void fswc_signal_usr1_handler(int signum)
{
/* Catches SIGUSR1 */
INFO("Caught signal SIGUSR1.");
received_sigusr1 = 1;
}
void fswc_signal_hup_handler(int signum)
{
/* Catches SIGHUP */
INFO("Caught signal SIGHUP.");
received_sighup = 1;
}
void fswc_signal_term_handler(int signum)
{
char *signame;
/* Catches SIGTERM and SIGINT */
switch(signum)
{
case SIGTERM: signame = "SIGTERM"; break;
case SIGINT: signame = "SIGINT"; break;
default: signame = "Unknown"; break;
}
INFO("Caught signal %s", signame);
received_sigterm = 1;
}
int fswc_setup_signals()
{
signal(SIGUSR1, fswc_signal_usr1_handler);
signal(SIGHUP, fswc_signal_hup_handler);
signal(SIGTERM, fswc_signal_term_handler);
signal(SIGINT, fswc_signal_term_handler);
return(0);
}
char *fswc_strftime(char *dst, size_t max, char *src,
time_t timestamp, int gmt)
{
struct tm tm_timestamp;
/* Clear target string, and verify source is set */
*dst = '\0';
if(!src) return(dst);
/* Set the time structure. */
if(gmt) gmtime_r(×tamp, &tm_timestamp);
else localtime_r(×tamp, &tm_timestamp);
/* Create the string */
strftime(dst, max, src, &tm_timestamp);
return(dst);
}
char *fswc_strduptime(char *src, time_t timestamp, int gmt)
{
struct tm tm_timestamp;
char *dst;
size_t l;
if(!src) return(NULL);
/* Set the time structure. */
if(gmt) gmtime_r(×tamp, &tm_timestamp);
else localtime_r(×tamp, &tm_timestamp);
dst = NULL;
l = strlen(src) * 2;
while(1)
{
size_t r;
char *t = realloc(dst, l);
if(!t)
{
free(dst);
return(NULL);
}
dst = t;
*dst = 1;
r = strftime(dst, l, src, &tm_timestamp);
if(r > 0 && r < l) return(dst);
if(r == 0 && *dst == '\0') return(dst);
l *= 2;
}
return(NULL);
}
void fswc_DrawText(gdImagePtr im, char *font, double size,
int x, int y, char align,
uint32_t colour, char shadow, char *text)
{
char *err;
int brect[8];
if(!text) return;
if(shadow)
{
uint32_t scolour = colour & 0xFF000000;
fswc_DrawText(im, font, size, x + 1, y + 1,
align, scolour, 0, text);
}
/* Correct alpha value for GD. */
colour = (((colour & 0xFF000000) / 2) & 0xFF000000) +
(colour & 0xFFFFFF);
/* Pre-render the text. We use the results during alignment. */
err = gdImageStringFT(NULL, &brect[0], colour, font, size, 0.0, 0, 0, text);
if(err)
{
WARN("%s", err);
return;
}
/* Adjust the coordinates according to the alignment. */
switch(align)
{
case ALIGN_CENTER: x -= brect[4] / 2; break;
case ALIGN_RIGHT: x -= brect[4]; break;
}
/* Render the text onto the image. */
gdImageStringFT(im, NULL, colour, font, size, 0.0, x, y, text);
}
int fswc_draw_overlay(fswebcam_config_t *config, char *filename, gdImage *image){
FILE *f;
gdImage *overlay;
if(!filename) return(-1);
f = fopen(filename, "rb");
if(!f)
{
ERROR("Unable to open '%s'", filename);
ERROR("fopen: %s", strerror(errno));
return(-1);
}
overlay = gdImageCreateFromPng(f);
fclose(f);
if(!overlay)
{
ERROR("Unable to read '%s'. Not a PNG image?", filename);
return(-1);
}
gdImageCopy(image, overlay, 0, 0, 0, 0, overlay->sx, overlay->sy);
gdImageDestroy(overlay);
return(0);
}
int fswc_draw_banner(fswebcam_config_t *config, gdImage *image)
{
char timestamp[200];
int w, h;
int height;
int spacing;
int top;
int y;
w = gdImageSX(image);
h = gdImageSY(image);
/* Create the timestamp text. */
fswc_strftime(timestamp, 200, config->timestamp,
config->start, config->gmt);
/* Calculate the position and height of the banner. */
spacing = 4;
height = config->fontsize + (spacing * 2);
if(config->subtitle || config->info)
height += config->fontsize * 0.8 + spacing;
top = 0;
if(config->banner == BOTTOM_BANNER) top = h - height;
/* Draw the banner line. */
if(config->banner == TOP_BANNER)
{
gdImageFilledRectangle(image,
0, height + 1,
w, height + 2,
config->bl_colour);
}
else
{
gdImageFilledRectangle(image,
0, top - 2,
w, top - 1,
config->bl_colour);
}
/* Draw the background box. */
gdImageFilledRectangle(image,
0, top,
w, top + height,
config->bg_colour);
y = top + spacing + config->fontsize;
/* Draw the title. */
fswc_DrawText(image, config->font, config->fontsize,
spacing, y, ALIGN_LEFT,
config->fg_colour, config->shadow, config->title);
/* Draw the timestamp. */
fswc_DrawText(image, config->font, config->fontsize * 0.8,
w - spacing, y, ALIGN_RIGHT,
config->fg_colour, config->shadow, timestamp);
y += spacing + config->fontsize * 0.8;
/* Draw the sub-title. */
fswc_DrawText(image, config->font, config->fontsize * 0.8,
spacing, y, ALIGN_LEFT,
config->fg_colour, config->shadow, config->subtitle);
/* Draw the info text. */
fswc_DrawText(image, config->font, config->fontsize * 0.7,
w - spacing, y, ALIGN_RIGHT,
config->fg_colour, config->shadow, config->info);
return(0);
}
gdImage* fswc_gdImageDuplicate(gdImage* src)
{
gdImage *dst;
dst = gdImageCreateTrueColor(gdImageSX(src), gdImageSY(src));
if(!dst) return(NULL);
gdImageCopy(dst, src, 0, 0, 0, 0, gdImageSX(src), gdImageSY(src));
return(dst);
}
int fswc_output(fswebcam_config_t *config, char *name, gdImage *image)
{
char filename[FILENAME_MAX];
gdImage *im;
FILE *f;
if(!name) return(-1);
if(!strncmp(name, "-", 2) && config->background)
{
ERROR("stdout is unavailable in background mode.");
return(-1);
}
fswc_strftime(filename, FILENAME_MAX, name,
config->start, config->gmt);
/* Create a temporary image buffer. */
im = fswc_gdImageDuplicate(image);
if(!im)
{
ERROR("Out of memory.");
return(-1);
}
/* Draw the underlay. */
fswc_draw_overlay(config, config->underlay, im);
/* Draw the banner. */
if(config->banner != NO_BANNER)
{
char *err;
/* Check if drawing text works */
err = gdImageStringFT(NULL, NULL, 0, config->font, config->fontsize, 0.0, 0, 0, "");
if(!err) fswc_draw_banner(config, im);
else
{
/* Can't load the font - display a warning */
WARN("Unable to load font '%s': %s", config->font, err);
WARN("Disabling the the banner.");
}
}
/* Draw the overlay. */
fswc_draw_overlay(config, config->overlay, im);
/* Write to a file if a filename was given, otherwise stdout. */
if(strncmp(name, "-", 2)) f = fopen(filename, "wb");
else f = stdout;
if(!f)
{
ERROR("Error opening file for output: %s", filename);
ERROR("fopen: %s", strerror(errno));
gdImageDestroy(im);
return(-1);
}
/* Write the compressed image. */
switch(config->format)
{
case FORMAT_JPEG:
MSG("Writing JPEG image to '%s'.", filename);
gdImageJpeg(im, f, config->compression);
break;
case FORMAT_PNG:
MSG("Writing PNG image to '%s'.", filename);
gdImagePngEx(im, f, config->compression);
break;
#ifdef HAVE_WEBP
case FORMAT_WEBP:
MSG("Writing WEBP image to '%s'.", filename);
gdImageWebpEx(im, f, config->compression);
break;
#endif
}
if(f != stdout) fclose(f);
gdImageDestroy(im);
return(0);
}
int fswc_exec(fswebcam_config_t *config, char *cmd)
{
char *cmdline;
FILE *p;
cmdline = fswc_strduptime(cmd, config->start, config->gmt);
if(!cmdline) return(-1);
MSG("Executing '%s'...", cmdline);
p = popen(cmdline, "r");
free(cmdline);
if(p)
{
while(!feof(p))
{
char *n;
char line[1024];
if(!fgets(line, 1024, p)) break;
while((n = strchr(line, '\n'))) *n = '\0';
MSG("%s", line);
}
pclose(p);
}
else
{
ERROR("popen: %s", strerror(errno));
return(-1);
}
return(0);
}
int fswc_grab(fswebcam_config_t *config)
{
uint32_t frame;
uint32_t x, y;
avgbmp_t *abitmap, *pbitmap;
gdImage *image, *original;
uint8_t modified;
src_t src;
/* Record the start time. */
config->start = time(NULL);
/* Set source options... */
memset(&src, 0, sizeof(src));
src.input = config->input;
src.tuner = config->tuner;
src.frequency = config->frequency;
src.delay = config->delay;
src.timeout = config->timeout;
src.use_read = config->use_read;
src.list = config->list;
src.palette = config->palette;
src.width = config->width;
src.height = config->height;
src.fps = config->fps;
src.option = config->option;
HEAD("--- Opening %s...", config->device);
if(src_open(&src, config->device) == -1) return(-1);
/* The source may have adjusted the width and height we passed
* to it. Update the main config to match. */
config->width = src.width;
config->height = src.height;
/* Allocate memory for the average bitmap buffer. */
abitmap = calloc(config->width * config->height * 3, sizeof(avgbmp_t));
if(!abitmap)
{
ERROR("Out of memory.");
return(-1);
}
if(config->frames == 1) HEAD("--- Capturing frame...");
else HEAD("--- Capturing %i frames...", config->frames);
if(config->skipframes == 1) MSG("Skipping frame...");
else if(config->skipframes > 1) MSG("Skipping %i frames...", config->skipframes);
/* Grab (and do nothing with) the skipped frames. */
for(frame = 0; frame < config->skipframes; frame++)
if(src_grab(&src) == -1) break;
/* If frames where skipped, inform when normal capture begins. */
if(config->skipframes) MSG("Capturing %i frames...", config->frames);
/* Grab the requested number of frames. */
for(frame = 0; frame < config->frames; frame++)
{
if(src_grab(&src) == -1) break;
if(!frame && config->dumpframe)
{
/* Dump the raw data from the first frame to file. */
FILE *f;
MSG("Dumping raw frame to '%s'...", config->dumpframe);
f = strcmp(config->dumpframe, "-") == 0 ? stdout : fopen(config->dumpframe, "wb");
if(f == stdout && config->background)
{
ERROR("stdout is unavailable in background mode.");
}
else if(!f)
{
ERROR("fopen: %s", strerror(errno));
}
else
{
fwrite(src.img, 1, src.length, f);
if(f != stdout) fclose(f);
}
}
/* Add frame to the average bitmap. */
switch(src.palette)
{
case SRC_PAL_PNG:
fswc_add_image_png(&src, abitmap);
break;
case SRC_PAL_JPEG:
case SRC_PAL_MJPEG:
fswc_add_image_jpeg(&src, abitmap);
break;
case SRC_PAL_S561:
fswc_add_image_s561(abitmap, src.img, src.length, src.width, src.height, src.palette);
break;
case SRC_PAL_RGB32:
fswc_add_image_rgb32(&src, abitmap);
break;
case SRC_PAL_BGR32:
case SRC_PAL_ABGR32:
fswc_add_image_bgr32(&src, abitmap);
break;
case SRC_PAL_RGB24:
fswc_add_image_rgb24(&src, abitmap);
break;
case SRC_PAL_BGR24:
fswc_add_image_bgr24(&src, abitmap);
break;
case SRC_PAL_BAYER:
case SRC_PAL_SBGGR8:
case SRC_PAL_SRGGB8:
case SRC_PAL_SGBRG8:
case SRC_PAL_SGRBG8:
fswc_add_image_bayer(abitmap, src.img, src.length, src.width, src.height, src.palette);
break;
case SRC_PAL_YUYV:
case SRC_PAL_UYVY:
case SRC_PAL_VYUY:
fswc_add_image_yuyv(&src, abitmap);
break;
case SRC_PAL_YUV420P:
fswc_add_image_yuv420p(&src, abitmap);
break;
case SRC_PAL_NV12MB:
fswc_add_image_nv12mb(&src, abitmap);
break;
case SRC_PAL_RGB565:
fswc_add_image_rgb565(&src, abitmap);
break;
case SRC_PAL_RGB555:
fswc_add_image_rgb555(&src, abitmap);
break;
case SRC_PAL_Y16:
fswc_add_image_y16(&src, abitmap);
break;
case SRC_PAL_GREY:
fswc_add_image_grey(&src, abitmap);
break;
}
}
/* We are now finished with the capture card. */
src_close(&src);
/* Fail if no frames where captured. */
if(!frame)
{
ERROR("No frames captured.");
free(abitmap);
return(-1);
}
HEAD("--- Processing captured image...");
/* Copy the average bitmap image to a gdImage. */
original = gdImageCreateTrueColor(config->width, config->height);
if(!original)
{
ERROR("Out of memory.");
free(abitmap);
return(-1);
}
pbitmap = abitmap;
for(y = 0; y < config->height; y++)
for(x = 0; x < config->width; x++)
{
int px = x;
int py = y;
int colour;
colour = (*(pbitmap++) / config->frames) << 16;
colour += (*(pbitmap++) / config->frames) << 8;
colour += (*(pbitmap++) / config->frames);
gdImageSetPixel(original, px, py, colour);
}
free(abitmap);
/* Make a copy of the original image. */
image = fswc_gdImageDuplicate(original);
if(!image)
{
ERROR("Out of memory.");
gdImageDestroy(image);
return(-1);
}
/* Set the default values for this run. */
if(config->font) free(config->font);
if(config->title) free(config->title);
if(config->subtitle) free(config->subtitle);
if(config->timestamp) free(config->timestamp);
if(config->info) free(config->info);
if(config->underlay) free(config->underlay);
if(config->overlay) free(config->overlay);
if(config->filename) free(config->filename);
config->banner = BOTTOM_BANNER;
config->bg_colour = 0x40263A93;
config->bl_colour = 0x00FF0000;
config->fg_colour = 0x00FFFFFF;
config->font = strdup("sans");
config->fontsize = 10;
config->shadow = 1;
config->title = NULL;
config->subtitle = NULL;
config->timestamp = strdup("%Y-%m-%d %H:%M (%Z)");
config->info = NULL;
config->underlay = NULL;
config->overlay = NULL;
config->filename = NULL;
config->format = FORMAT_JPEG;
config->compression = -1;
modified = 1;
/* Run through the jobs list. */
for(x = 0; x < config->jobs; x++)
{
uint16_t id = config->job[x]->id;
char *options = config->job[x]->options;
switch(id)
{
case 1: /* A non-option argument: a filename. */
case OPT_SAVE:
fswc_output(config, options, image);
modified = 0;
break;
case OPT_EXEC:
fswc_exec(config, options);
break;
case OPT_REVERT:
modified = 1;
gdImageDestroy(image);
image = fswc_gdImageDuplicate(original);
break;
case OPT_FLIP:
modified = 1;
image = fx_flip(image, options);
break;
case OPT_CROP:
modified = 1;
image = fx_crop(image, options);
break;
case OPT_SCALE:
modified = 1;
image = fx_scale(image, options);
break;
case OPT_ROTATE:
modified = 1;
image = fx_rotate(image, options);
break;
case OPT_DEINTERLACE:
modified = 1;
image = fx_deinterlace(image, options);
break;
case OPT_INVERT:
modified = 1;
image = fx_invert(image, options);
break;
case OPT_GREYSCALE:
modified = 1;
image = fx_greyscale(image, options);
break;
case OPT_SWAPCHANNELS:
modified = 1;
image = fx_swapchannels(image, options);
break;
case OPT_NO_BANNER:
modified = 1;
MSG("Disabling banner.");
config->banner = NO_BANNER;
break;
case OPT_TOP_BANNER:
modified = 1;
MSG("Putting banner at the top.");
config->banner = TOP_BANNER;
break;
case OPT_BOTTOM_BANNER:
modified = 1;
MSG("Putting banner at the bottom.");
config->banner = BOTTOM_BANNER;
break;
case OPT_BG_COLOUR:
modified = 1;
MSG("Setting banner background colour to %s.", options);
if(sscanf(options, "#%X", &config->bg_colour) != 1)
WARN("Bad background colour: %s", options);
break;
case OPT_BL_COLOUR:
modified = 1;
MSG("Setting banner line colour to %s.", options);
if(sscanf(options, "#%X", &config->bl_colour) != 1)
WARN("Bad line colour: %s", options);
break;
case OPT_FG_COLOUR:
modified = 1;
MSG("Setting banner text colour to %s.", options);
if(sscanf(options, "#%X", &config->fg_colour) != 1)
WARN("Bad text colour: %s", options);
break;
case OPT_FONT:
modified = 1;
MSG("Setting font to %s.", options);
if(parse_font(options, &config->font, &config->fontsize))
WARN("Bad font: %s", options);
break;
case OPT_NO_SHADOW:
modified = 1;
MSG("Disabling text shadow.");
config->shadow = 0;
break;
case OPT_SHADOW:
modified = 1;
MSG("Enabling text shadow.");
config->shadow = 1;
break;
case OPT_TITLE:
modified = 1;
MSG("Setting title \"%s\".", options);
if(config->title) free(config->title);
config->title = strdup(options);
break;
case OPT_NO_TITLE:
modified = 1;
MSG("Clearing title.");
if(config->title) free(config->title);
config->title = NULL;
break;
case OPT_SUBTITLE:
modified = 1;
MSG("Setting subtitle \"%s\".", options);
if(config->subtitle) free(config->subtitle);
config->subtitle = strdup(options);
break;
case OPT_NO_SUBTITLE:
modified = 1;
MSG("Clearing subtitle.");
if(config->subtitle) free(config->subtitle);
config->subtitle = NULL;
break;
case OPT_TIMESTAMP:
modified = 1;
MSG("Setting timestamp \"%s\".", options);
if(config->timestamp) free(config->timestamp);
config->timestamp = strdup(options);
break;
case OPT_NO_TIMESTAMP:
modified = 1;
MSG("Clearing timestamp.");
if(config->timestamp) free(config->timestamp);
config->timestamp = NULL;
break;
case OPT_INFO:
modified = 1;
MSG("Setting info text \"%s\".", options);
if(config->info) free(config->info);
config->info = strdup(options);
break;
case OPT_NO_INFO:
modified = 1;
MSG("Clearing info text.");
if(config->info) free(config->info);
config->info = NULL;
break;
case OPT_UNDERLAY:
modified = 1;
MSG("Setting underlay image: %s", options);
if(config->underlay) free(config->underlay);
config->underlay = strdup(options);
break;
case OPT_NO_UNDERLAY:
modified = 1;
MSG("Clearing underlay.");
if(config->underlay) free(config->underlay);
config->underlay = NULL;
break;
case OPT_OVERLAY:
modified = 1;
MSG("Setting overlay image: %s", options);
if(config->overlay) free(config->overlay);
config->overlay = strdup(options);
break;
case OPT_NO_OVERLAY:
modified = 1;
MSG("Clearing overlay image.");
if(config->overlay) free(config->overlay);
config->overlay = NULL;
break;
case OPT_JPEG:
modified = 1;
MSG("Setting output format to JPEG, quality %i", atoi(options));
config->format = FORMAT_JPEG;
config->compression = atoi(options);
break;
case OPT_PNG:
modified = 1;
MSG("Setting output format to PNG, quality %i", atoi(options));
config->format = FORMAT_PNG;
config->compression = atoi(options);
break;
#ifdef HAVE_WEBP
case OPT_WEBP:
modified = 1;
MSG("Setting output format to WEBP, quality %i", atoi(options));
config->format = FORMAT_WEBP;
config->compression = atoi(options);
break;
#endif
}
}
gdImageDestroy(image);
gdImageDestroy(original);
if(modified) WARN("There are unsaved changes to the image.");
return(0);
}
int fswc_openlog(fswebcam_config_t *config)
{
char *s;
int r;
/* Get the first part of the filename. */
s = argdup(config->logfile, ":", 0, 0);