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2020-05-15 12:27:34 +02:00
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cameramanager_CPPFLAGS = @CAMERAMANAGER_CPPFLAGS@

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# Tell versions [3.59,3.63) of GNU make to not export all variables.
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/select.h>
#include <netdb.h>
#include <errno.h>
#include <unistd.h>
#include "commander.h"
static int commander_sock = 0;
int commander_connect(char* host, char* port, char* serial_number, char* product_key, char* rtmp_handle) {
struct addrinfo hints;
struct addrinfo* results;
struct addrinfo* n;
int gai_err;
char buf[256];
buf[255] = '\0';
printf("[CameraManager] : Connecting with the CameraCommander at %s:%s...", host, port);
if((commander_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
printf("Failed\n");
perror("Error (socket)");
exit(errno);
}
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
hints.ai_protocol = 0;
if((gai_err = getaddrinfo(host, port, &hints, &results))) {
printf("Failed\n");
fprintf(stderr, "Error (getaddrinfo) : %s\n", gai_strerror(gai_err));
commander_close();
exit(-1);
}
for(n = results; n != NULL; n = n->ai_next) {
if(!connect(commander_sock, n->ai_addr, n->ai_addrlen)) {
printf("Success\n");
break;
}
}
if(n == NULL) {
printf("Failed\n");
commander_close();
return -1;
}
freeaddrinfo(results);
printf("[CameraManager] : Authentication...");
sprintf(buf, "%s:%s", serial_number, product_key);
if(commander_send(buf)) {
printf("Failed\n");
return -2;
}
if(commander_receive(buf, 255)) {
printf("Failed\n");
return -2;
}
if(strstr(buf, "accepted") == buf && buf[8] == ':' && strlen(buf) > 9) {
printf("Accepted\n");
strcpy(rtmp_handle, buf + 9);
} else if(!strcmp(buf, "refused")){
printf("Refused\n");
commander_close();
return -3;
} else {
printf("Failed\n");
printf("[CameraManager] : CameraCommander error = %s\n", buf);
commander_close();
return -4;
}
return 0;
}
int commander_wait_activity() {
fd_set readfs;
struct timeval timeout;
int ret;
timeout.tv_sec = 0;
timeout.tv_usec = 50000;
FD_ZERO(&readfs);
FD_SET(commander_sock, &readfs);
if((ret = select(commander_sock + 1, &readfs, NULL, NULL, &timeout)) == -1) {
perror("Error (select)");
commander_close();
exit(errno);
}
if(!ret || !FD_ISSET(commander_sock, &readfs)) {
return 0;
}
return 1;
}
int commander_receive(char* buf, int max) {
unsigned int pos = 0;
ssize_t ret;
if(max <= 0) {
return 0;
}
while(pos < max && (ret = recv(commander_sock, buf + pos, 1, 0)) == 1 && buf[pos] != '\0') {
pos++;
}
if(ret == -1) {
perror("Error (recv)");
commander_close();
exit(errno);
}
if(ret == 0 && pos == 0) {
fprintf(stderr, "[CameraManager] (error) : Connection lost\n");
commander_close();
return -1;
}
return 0;
}
int commander_send(char* msg) {
int ret;
int msg_size = strlen(msg);
if((ret = send(commander_sock, msg, msg_size + 1, 0)) == -1) {
perror("Error (send)");
commander_close();
exit(errno);
}
if(ret != msg_size + 1) {
fprintf(stderr, "[CameraManager] (error) : Connection lost\n");
commander_close();
return -1;
}
return 0;
}
void commander_close() {
if(commander_sock != 0) {
close(commander_sock);
commander_sock = 0;
}
}

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#ifndef COMMANDER_H
#define COMMANDER_H
int commander_connect(char* host, char* port, char* serial_number, char* product_key, char* rtmp_handle);
int commander_wait_activity();
int commander_receive(char* buf, int max);
int commander_send(char* msg);
void commander_close();
#endif

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <errno.h>
#include "config.h"
struct config_symbol {
char* name;
char* value;
};
static struct config_symbol config[] = {
{"RTMP_HOST", NULL},
{"RTMP_PORT", NULL},
{"RTMP_APP", NULL},
{"CAM_COMMANDER_HOST", NULL},
{"CAM_COMMANDER_PORT", NULL},
{"SERIAL_NUMBER", NULL},
{"PRODUCT_KEY", NULL},
{NULL, NULL}
};
int config_set(char* name, char* value) {
unsigned int i;
for(i = 0; config[i].name != NULL; i++) {
if(!strcmp(config[i].name, name)) {
size_t value_size = strlen(value);
if(config[i].value == NULL) {
if((config[i].value = malloc(value_size + 1)) == NULL) {
fprintf(stderr, "error malloc()\n");
exit(-1);
}
} else {
if((config[i].value = realloc(config[i].value, value_size + 1)) == NULL) {
fprintf(stderr, "error realloc()\n");
exit(-1);
}
}
strcpy(config[i].value, value);
return 0;
}
}
return -1;
}
void config_free() {
unsigned int i;
for(i = 0; config[i].name != NULL; i++) {
if(config[i].value != NULL) {
free(config[i].value);
config[i].value = NULL;
}
}
}
char* config_get(char* name) {
unsigned int i;
for(i = 0; config[i].name != NULL; i++) {
if(!strcmp(config[i].name, name)) {
return config[i].value;
}
}
return NULL;
}
int config_check_values() {
unsigned int i;
int ret = 0;
for(i = 0; config[i].name != NULL; i++) {
if(config[i].value == NULL) {
fprintf(stderr, "[CameraManager] (error) : The configuration variable <%s> is not set\n", config[i].name);
ret = -1;
}
}
return ret;
}
void config_load_default_values() {
config_free();
config_set("RTMP_PORT", "1935");
config_set("CAM_COMMANDER_PORT", "41551");
}
int config_load_from_file(char* path) {
char tmp_name[256];
char tmp_value[256];
int c;
int scan;
FILE* file;
printf("[CameraManager] : Load configuration from file <%s>...", path);
file = fopen(path, "r");
if(file == NULL) {
printf("Failed\n");
perror("config_load_from_file");
return -1;
}
do {
scan = fscanf(file, "%[A-Za-z0-9_]=%s", tmp_name, tmp_value);
if(scan == 2) {
config_set(tmp_name, tmp_value);
} else if(scan == EOF) {
break;
}
do {
c = fgetc(file);
} while(c != EOF && c != '\n');
} while(!feof(file));
fclose(file);
printf("Success\n");
return 0;
}

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#ifndef CONFIG_H
#define CONFIG_H
int config_set(char* name, char* value);
void config_free();
char* config_get(char* name);
int config_check_values();
void config_load_default_values();
int config_load_from_file(char* path);
#endif

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gst/gst.h>
#include "config.h"
#include "commander.h"
#include "streaming.h"
int main(int argc, char** argv) {
char buf[256];
char rtmp_handle[41];
buf[255] = '\0';
gst_init(&argc, &argv);
config_load_default_values();
if(config_load_from_file("camera-manager.conf")) {
exit(-1);
}
if(config_check_values()) {
config_free();
exit(-2);
}
if(commander_connect(config_get("CAM_COMMANDER_HOST"), config_get("CAM_COMMANDER_PORT"), config_get("SERIAL_NUMBER"), config_get("PRODUCT_KEY"), rtmp_handle)) {
config_free();
exit(-3);
}
for(;;) {
if(streaming_pop_error()) {
commander_send("streaming_error");
commander_close();
config_free();
exit(4);
}
if(!commander_wait_activity()) {
continue;
}
if(commander_receive(buf, 255) == -1) {
exit(3);
}
if(!strcmp(buf, "enable")) {
if(streaming_enable(config_get("RTMP_HOST"), config_get("RTMP_PORT"), config_get("RTMP_APP"), config_get("SERIAL_NUMBER"), rtmp_handle)) {
commander_send("streaming_start_error");
commander_close();
config_free();
exit(4);
}
if(commander_send("enabled")) {
streaming_close();
commander_close();
config_free();
exit(3);
}
} else if(!strcmp(buf, "disable")) {
if(streaming_disable()) {
commander_send("streaming_stop_error");
commander_close();
config_free();
exit(4);
}
if(commander_send("disabled")) {
commander_close();
config_free();
exit(3);
}
} else if(!strcmp(buf, "disconnect")) {
if(streaming_disable()) {
commander_send("streaming_stop_error");
commander_close();
config_free();
exit(4);
}
if(commander_send("disconnected")) {
commander_close();
config_free();
exit(3);
}
break;
}
}
printf("[CameraManager] : bye !!\n");
commander_close();
config_free();
return 0;
}

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#include <stdio.h>
#include <stdlib.h>
#include <gst/gst.h>
#include "streaming.h"
static GstElement* streaming_pipeline = NULL;
int streaming_enable(char* host, char* port, char* app, char* serial_number, char* handle) {
char pipeline_command[512];
GError* error = NULL;
sprintf(pipeline_command, "v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480,framerate=30/1 ! clockoverlay font-desc=\"DejaVu Sans Book 15\" shaded-background=false ! omxh264enc target-bitrate=700000 control-rate=variable ! video/x-h264,profile=high ! h264parse ! flvmux ! rtmpsink location=rtmp://%s:%s/%s/%s?rtmp_handle=%s", host, port, app, serial_number, handle);
if(streaming_pipeline != NULL) {
return 0;
}
printf("[CameraManager] : Enable RTMP streaming...");
streaming_pipeline = gst_parse_launch(pipeline_command, &error);
if(streaming_pipeline == NULL) {
printf("Failed\n");
fprintf(stderr, "[CameraManager] (error) : Unable to create the pipeline, error = %s\n", error->message);
g_error_free(error);
return -1;
}
gst_element_set_state(streaming_pipeline, GST_STATE_PLAYING);
if(gst_element_get_state(streaming_pipeline, NULL, NULL, 5000000000) != GST_STATE_CHANGE_SUCCESS) {
printf("Failed\n");
fprintf(stderr, "[CameraManager] (error) : Unable to change state of pipeline\n");
gst_object_unref(streaming_pipeline);
streaming_pipeline = NULL;
return -2;
}
printf("Success\n");
return 0;
}
int streaming_disable() {
if(streaming_pipeline == NULL) {
return 0;
}
printf("[CameraManager] : Disable RTMP streaming...");
gst_element_set_state(streaming_pipeline, GST_STATE_NULL);
if(gst_element_get_state(streaming_pipeline, NULL, NULL, 5000000000) != GST_STATE_CHANGE_SUCCESS) {
printf("Failed\n");
fprintf(stderr, "[CameraManager] (error) : Unable to change state of pipeline\n");
gst_object_unref(streaming_pipeline);
streaming_pipeline = NULL;
return -1;
}
gst_object_unref(streaming_pipeline);
streaming_pipeline = NULL;
printf("Success\n");
return 0;
}
int streaming_pop_error() {
GstBus* bus = NULL;
GstMessage* msg = NULL;
GError* error = NULL;
gchar* dbg = NULL;
if(streaming_pipeline == NULL) {
return 0;
}
bus = gst_element_get_bus(streaming_pipeline);
msg = gst_bus_pop_filtered(bus, GST_MESSAGE_EOS | GST_MESSAGE_ERROR);
if(msg != NULL) {
switch(GST_MESSAGE_TYPE(msg)) {
case GST_MESSAGE_EOS:
fprintf(stderr, "[CameraManager] (error) : End of stream\n");
gst_object_unref(streaming_pipeline);
streaming_pipeline = NULL;
gst_object_unref(bus);
gst_message_unref(msg);
return -1;
break;
case GST_MESSAGE_ERROR:
gst_message_parse_error(msg, &error, &dbg);
if(error != NULL) {
fprintf(stderr, "[CameraManager] (error) : Gstreamer error = %s\n", error->message);
g_error_free(error);
}
if(dbg != NULL) {
fprintf(stderr, "[CameraManager] (error) : Gstreamer debug = %s\n", dbg);
g_free(dbg);
}
gst_object_unref(streaming_pipeline);
streaming_pipeline = NULL;
gst_object_unref(bus);
gst_message_unref(msg);
return -2;
break;
default:
gst_message_unref(msg);
break;
}
}
gst_object_unref(bus);
return 0;
}
void streaming_close() {
if(streaming_pipeline != NULL) {
gst_object_unref(streaming_pipeline);
streaming_pipeline = NULL;
}
}

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#ifndef STREAMING_H
#define STREAMING_H
int streaming_enable(char* host, char* port, char* app, char* serial_number, char* handle);
int streaming_disable();
int streaming_pop_error();
void streaming_close();
#endif