Finish video player

2 files changed, 166 insertions, 0 deletions

diff --git a/video_player/include/Args.hpp b/video_player/include/Args.hpp
new file mode 100644
index 0000000..610f0b0
--- /dev/null
+++ b/video_player/include/Args.hpp
@@ -0,0 +1,136 @@
+#pragma once
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <string>
+#include <vector>
+
+struct MpvProperty {
+    std::string key;
+    std::string value;
+};
+
+struct Args {
+    long wid_num = 0;
+    long ipc_fd_num = 0;
+
+    const char *ipc_fd = nullptr;
+    const char *audio_file = nullptr;
+    const char *file_to_play = nullptr;
+
+    std::vector<MpvProperty> mpv_properties;
+};
+
+static void usage() {
+    fprintf(stderr, "usage: quickmedia-video-player [--ipc-fd <fd>] [--audio-file <audio_file>] [--key=value...] <file>\n");
+    fprintf(stderr, "  --ipc-fd <fd>                A bi-directional (socketpair) file descriptor to receive commands from. Optional\n");
+    fprintf(stderr, "  --audio-file <audio_file>    Load the given audio file. Optional\n");
+    fprintf(stderr, "  --key=value                  Additional options in the format --key=value are passed directly to mpv as string properties. Optional\n");
+    fprintf(stderr, "examples:\n");
+    fprintf(stderr, "  quickmedia-video-player video.mp4\n");
+    fprintf(stderr, "  quickmedia-video-player --wid 30481231 -- video.mp4\n");
+    exit(1);
+}
+
+static bool string_to_long(const char *str, long &result) {
+    errno = 0;
+    char *endptr = NULL;
+    result = strtol(str, &endptr, 0);
+    return endptr != str && errno == 0;
+}
+
+static bool string_to_double(const char *str, double &result) {
+    errno = 0;
+    char *endptr = NULL;
+    result = strtod(str, &endptr);
+    return endptr != str && errno == 0;
+}
+
+static bool fd_is_valid(int fd) {
+    errno = 0;
+    return fcntl(fd, F_GETFD) != -1 && errno != EBADF;
+}
+
+static Args parse_args(int argc, char **argv) {
+    Args args;
+
+    for(int i = 1; i < argc; ++i) {
+        const char *arg = argv[i];
+        if(strcmp(arg, "--audio-file") == 0) {
+            if(args.audio_file) {
+                fprintf(stderr, "Error: option --audio-file was specified multiple times\n");
+                usage();
+            }
+
+            if(i + 1 == argc) {
+                fprintf(stderr, "Error: missing audio file after option --audio-file\n");
+                usage();
+            }
+
+            args.audio_file = argv[i + 1];
+            ++i;
+        } else if(strcmp(arg, "--ipc-fd") == 0) {
+            if(args.ipc_fd) {
+                fprintf(stderr, "Error: option --ipc-fd was specified multiple times\n");
+                usage();
+            }
+
+            if(i + 1 == argc) {
+                fprintf(stderr, "Error: missing fd after option --ipc-fd\n");
+                usage();
+            }
+
+            args.ipc_fd = argv[i + 1];
+            ++i;
+        } else if(strcmp(arg, "--") == 0) {
+            if(i + 1 == argc) {
+                fprintf(stderr, "Error: missing file option after --\n");
+                usage();
+            } else if(i + 1 != argc - 1) {
+                fprintf(stderr, "Error: more than one option was specified after --\n");
+                usage();
+            }
+
+            args.file_to_play = argv[i + 1];
+            ++i;
+        } else if(strncmp(arg, "--", 2) == 0) {
+            const char *equal_p = strchr(arg, '=');
+            if(!equal_p) {
+                fprintf(stderr, "Error: mpv option %s is missing \"=\"\n", arg);
+                usage();
+            }
+
+            args.mpv_properties.push_back({ std::string(arg + 2, equal_p - (arg + 2)), equal_p + 1 });
+        } else {
+            if(args.file_to_play) {
+                fprintf(stderr, "Error: file option was specified multiple times\n");
+                usage();
+            }
+
+            args.file_to_play = arg;
+        }
+    }
+
+    if(!args.file_to_play) {
+        fprintf(stderr, "Error: missing file option\n");
+        usage();
+    }
+
+    if(args.ipc_fd) {
+        if(!string_to_long(args.ipc_fd, args.ipc_fd_num)) {
+            fprintf(stderr, "Error: invalid number %s was specified for option --ipc-fd\n", args.ipc_fd);
+            usage();
+        }
+
+        if(!fd_is_valid(args.ipc_fd_num)) {
+            fprintf(stderr, "Error: invalid fd %s was specified for option --ipc-fd\n", args.ipc_fd);
+            usage();
+        }
+    }
+
+    return args;
+}
\ No newline at end of file
diff --git a/video_player/include/Utils.hpp b/video_player/include/Utils.hpp
new file mode 100644
index 0000000..a5219f4
--- /dev/null
+++ b/video_player/include/Utils.hpp
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <unistd.h>
+#include <errno.h>
+
+static ssize_t read_eintr(int fd, void *buffer, size_t size) {
+    while(true) {
+        ssize_t bytes_read = read(fd, buffer, size);
+        if(bytes_read == -1) {
+            if(errno != EINTR)
+                return -1;
+        } else {
+            return bytes_read;
+        }
+    }
+}
+
+static ssize_t write_all(int fd, const void *buffer, size_t size) {
+    ssize_t bytes_written = 0;
+    while((size_t)bytes_written < size) {
+        ssize_t written = write(fd, (char*)buffer + bytes_written, size - bytes_written);
+        if(written == -1) {
+            if(errno != EINTR)
+                return -1;
+        } else {
+            bytes_written += written;
+        }
+    }
+    return bytes_written;
+}
\ No newline at end of file