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Add bit-rate command-line option

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Add a command-line option (-b/--bit-rate) to customize the video
bit-rate.
This commit is contained in:
Romain Vimont
2018-02-01 16:36:50 +01:00
parent 7fe7bbf58c
commit 6b546a87ab
8 changed files with 79 additions and 15 deletions
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49
app/src/main.c
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@@ -6,13 +6,15 @@
#include <SDL2/SDL.h>
#define DEFAULT_LOCAL_PORT 27183
#define DEFAULT_MAX_SIZE 0
#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) {
@@ -25,6 +27,11 @@ static void usage(const char *arg0) {
"\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"
@@ -45,6 +52,7 @@ static void usage(const char *arg0) {
" 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);
}
@@ -54,10 +62,11 @@ static int parse_args(struct args *args, int argc, char *argv[]) {
{"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:", long_options, NULL)) != -1) {
while ((c = getopt_long(argc, argv, "hp:m:b:", long_options, NULL)) != -1) {
switch (c) {
case 'h': {
args->help = SDL_TRUE;
@@ -99,6 +108,35 @@ static int parse_args(struct args *args, int argc, char *argv[]) {
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;
@@ -120,10 +158,11 @@ int main(int argc, char *argv[]) {
int res;
struct args args = {
.help = SDL_FALSE,
.serial = NULL,
.max_size = DEFAULT_MAX_SIZE,
.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]);
@@ -143,7 +182,7 @@ int main(int argc, char *argv[]) {
SDL_LogSetAllPriority(SDL_LOG_PRIORITY_DEBUG);
res = scrcpy(args.serial, args.port, args.max_size) ? 0 : 1;
res = scrcpy(args.serial, args.port, args.max_size, args.bit_rate) ? 0 : 1;
avformat_network_deinit(); // ignore failure