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#include "../include/VideoPlayer.hpp"
#include "../include/Program.h"
#include <string>
#include <json/reader.h>
#include <assert.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
const int RETRY_TIME_MS = 1000;
const int MAX_RETRIES = 5;
namespace QuickMedia {
VideoPlayer::VideoPlayer(EventCallbackFunc _event_callback) :
video_process_id(-1),
ipc_socket(-1),
connected_to_ipc(false),
connect_tries(0),
event_callback(_event_callback),
alive(true)
{
}
VideoPlayer::~VideoPlayer() {
if(video_process_id != -1)
kill(video_process_id, SIGTERM);
if(ipc_socket != -1)
close(ipc_socket);
if(video_process_id != -1)
remove(ipc_server_path);
alive = false;
if(event_read_thread.joinable())
event_read_thread.join();
}
VideoPlayer::Error VideoPlayer::launch_video_process(const char *path, sf::WindowHandle parent_window) {
if(!tmpnam(ipc_server_path)) {
perror("Failed to generate ipc file name");
return Error::FAIL_TO_GENERATE_IPC_FILENAME;
}
const std::string parent_window_str = std::to_string(parent_window);
const char *args[] = { "mpv", /*"--keep-open=yes", "--keep-open-pause=no",*/ "--input-ipc-server", ipc_server_path,
"--no-config", "--no-input-default-bindings", "--input-vo-keyboard=no", "--no-input-cursor",
"--cache-secs=120", "--demuxer-max-bytes=20M", "--demuxer-max-back-bytes=10M",
"--vo=gpu", "--hwdec=auto",
"--wid", parent_window_str.c_str(), "--", path, nullptr };
if(exec_program_async(args, &video_process_id) != 0)
return Error::FAIL_TO_LAUNCH_PROCESS;
printf("mpv input ipc server: %s\n", ipc_server_path);
if((ipc_socket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
perror("Failed to create socket for video player");
return Error::FAIL_TO_CREATE_SOCKET;
}
ipc_addr.sun_family = AF_UNIX;
strcpy(ipc_addr.sun_path, ipc_server_path);
int flags = fcntl(ipc_socket, F_GETFL, 0);
fcntl(ipc_socket, F_SETFL, flags | O_NONBLOCK);
return Error::OK;
}
VideoPlayer::Error VideoPlayer::load_video(const char *path, sf::WindowHandle parent_window) {
if(video_process_id == -1)
return launch_video_process(path, parent_window);
std::string cmd = "loadfile ";
cmd += path;
return send_command(cmd.c_str(), cmd.size());
}
VideoPlayer::Error VideoPlayer::update() {
if(ipc_socket == -1)
return Error::INIT_FAILED;
if(connect_tries == MAX_RETRIES)
return Error::FAIL_TO_CONNECT_TIMEOUT;
if(!connected_to_ipc && ipc_connect_retry_timer.getElapsedTime().asMilliseconds() >= RETRY_TIME_MS) {
if(connect(ipc_socket, (struct sockaddr*)&ipc_addr, sizeof(ipc_addr)) == -1) {
++connect_tries;
if(connect_tries == MAX_RETRIES) {
fprintf(stderr, "Failed to connect to mpv ipc after 5 seconds, last error: %s\n", strerror(errno));
return Error::FAIL_TO_CONNECT_TIMEOUT;
}
} else {
connected_to_ipc = true;
if(event_callback)
event_read_thread = std::thread(&VideoPlayer::read_ipc_func, this);
}
}
return Error::OK;
}
void VideoPlayer::read_ipc_func() {
assert(connected_to_ipc);
assert(event_callback);
Json::Value json_root;
Json::CharReaderBuilder json_builder;
std::unique_ptr<Json::CharReader> json_reader(json_builder.newCharReader());
std::string json_errors;
char buffer[2048];
while(alive) {
ssize_t bytes_read = read(ipc_socket, buffer, sizeof(buffer));
if(bytes_read == -1) {
int err = errno;
if(err == EAGAIN) {
std::this_thread::sleep_for(std::chrono::milliseconds(50));
continue;
}
fprintf(stderr, "Failed to read from ipc socket, error: %s\n", strerror(err));
break;
} else if(bytes_read > 0) {
int start = 0;
for(int i = 0; i < bytes_read; ++i) {
if(buffer[i] != '\n')
continue;
if(json_reader->parse(buffer + start, buffer + i, &json_root, &json_errors)) {
const Json::Value &event = json_root["event"];
if(event.isString())
event_callback(event.asCString());
} else {
fprintf(stderr, "Failed to parse json for ipc: |%.*s|, reason: %s\n", (int)bytes_read, buffer, json_errors.c_str());
}
start = i + 1;
}
}
}
}
VideoPlayer::Error VideoPlayer::toggle_pause() {
const char cmd[] = "cycle pause\n";
return send_command(cmd, sizeof(cmd) - 1);
}
VideoPlayer::Error VideoPlayer::send_command(const char *cmd, size_t size) {
if(!connected_to_ipc)
return Error::FAIL_NOT_CONNECTED;
if(send(ipc_socket, cmd, size, 0) == -1) {
fprintf(stderr, "Failed to send to ipc socket, error: %s, command: %.*s\n", strerror(errno), (int)size, cmd);
return Error::FAIL_TO_SEND;
}
return Error::OK;
}
}
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