scrcpy/app/src/main.c

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#include "scrcpy.h"
#include <getopt.h>
#include <unistd.h>
#include <libavformat/avformat.h>
#include <SDL2/SDL.h>
#define DEFAULT_LOCAL_PORT 27183
#define DEFAULT_MAX_SIZE 0 // unlimited
#define DEFAULT_BIT_RATE 4000000 // 4Mbps
struct args {
const char *serial;
SDL_bool help;
Uint16 port;
Uint16 max_size;
Uint32 bit_rate;
};
static void usage(const char *arg0) {
fprintf(stderr,
"Usage: %s [options] [serial]\n"
"\n"
" serial\n"
" The device serial number. Mandatory only if several devices\n"
" are connected to adb.\n"
"\n"
"Options:\n"
"\n"
" -b, --bit-rate value\n"
" Encode the video at the given bit-rate, expressed in bits/s.\n"
" Unit suffixes are supported: 'K' (x1000) and 'M' (x1000000).\n"
" Default is %d.\n"
"\n"
" -h, --help\n"
" Print this help.\n"
"\n"
" -m, --max-size value\n"
" Limit both the width and height of the video to value. The\n"
" other dimension is computed so that the device aspect-ratio\n"
" is preserved.\n"
" Default is %d%s.\n"
"\n"
" -p, --port port\n"
" Set the TCP port the client listens on.\n"
" Default is %d.\n"
"\n"
"Shortcuts:\n"
"\n"
" Ctrl+f: switch fullscreen mode\n"
" Ctrl+g: resize window to 1:1 (pixel-perfect)\n"
" Ctrl+x: resize window to optimal size (remove black borders)\n"
"\n",
arg0,
DEFAULT_BIT_RATE,
DEFAULT_MAX_SIZE, DEFAULT_MAX_SIZE ? "" : " (unlimited)",
DEFAULT_LOCAL_PORT);
}
static int parse_args(struct args *args, int argc, char *argv[]) {
static const struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"port", required_argument, NULL, 'p'},
{"max-size", required_argument, NULL, 'm'},
{"bit-rate", required_argument, NULL, 'b'},
{NULL, 0, NULL, 0 },
};
int c;
while ((c = getopt_long(argc, argv, "hp:m:b:", long_options, NULL)) != -1) {
switch (c) {
case 'h': {
args->help = SDL_TRUE;
break;
}
case 'p': {
char *endptr;
if (*optarg == '\0') {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid port parameter is empty");
return -1;
}
long value = strtol(optarg, &endptr, 0);
if (*endptr != '\0') {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid port: %s", optarg);
return -1;
}
if (value & ~0xffff) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Port out of range: %ld", value);
return -1;
}
args->port = (Uint16) value;
break;
}
case 'm': {
char *endptr;
if (*optarg == '\0') {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Max size parameter is empty");
return -1;
}
long value = strtol(optarg, &endptr, 0);
if (*endptr != '\0') {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid max size: %s", optarg);
return -1;
}
if (value & ~0xffff) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Max size must be between 0 and 65535: %ld", value);
return -1;
}
args->max_size = (Uint16) value;
break;
}
case 'b': {
char *endptr;
if (*optarg == '\0') {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Bit-rate parameter is empty");
return -1;
}
long value = strtol(optarg, &endptr, 0);
int mul = 1;
if (*endptr != '\0') {
if (optarg == endptr) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid bit-rate: %s", optarg);
return -1;
}
if ((*endptr == 'M' || *endptr == 'm') && endptr[1] == '\0') {
mul = 1000000;
} else if ((*endptr == 'K' || *endptr == 'k') && endptr[1] == '\0') {
mul = 1000;
} else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid bit-rate unit: %s", optarg);
return -1;
}
}
if (value < 0 || ((Uint32) -1) / mul < value) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Bitrate must be positive and less than 2^32: %s", optarg);
return -1;
}
args->bit_rate = (Uint32) value * mul;
break;
}
default:
// getopt prints the error message on stderr
return -1;
}
}
int index = optind;
if (index < argc) {
args->serial = argv[index++];
}
if (index < argc) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unexpected additional argument: %s", argv[index]);
return -1;
}
return 0;
}
int main(int argc, char *argv[]) {
int res;
struct args args = {
.serial = NULL,
.help = SDL_FALSE,
.port = DEFAULT_LOCAL_PORT,
.max_size = DEFAULT_MAX_SIZE,
.bit_rate = DEFAULT_BIT_RATE,
};
if (parse_args(&args, argc, argv)) {
usage(argv[0]);
return 1;
}
if (args.help) {
usage(argv[0]);
return 0;
}
av_register_all();
if (avformat_network_init()) {
return 1;
}
SDL_LogSetAllPriority(SDL_LOG_PRIORITY_DEBUG);
res = scrcpy(args.serial, args.port, args.max_size, args.bit_rate) ? 0 : 1;
avformat_network_deinit(); // ignore failure
return res;
}