add mp4write feature from @mnakada, and patch in on-off capability to libcallback

libcallback_wz_mod/Makefile

@@ -2,7 +2,7 @@
 
 CC = /openmiko/build/mips-gcc472-glibc216-64bit/bin/mips-linux-uclibc-gnu-gcc
 CFLAGS = -fPIC -std=gnu99 -shared -ldl -ltinyalsa -lm -pthread
-CC_SRCS = video_callback.c audio_callback.c jpeg.c setlinebuf.c mmc_format.c curl.c freopen.c opendir.c remove.c motor.c command.c gmtime_r.c wait_motion.c irled.c audio_play.c
+CC_SRCS = video_callback.c audio_callback.c jpeg.c setlinebuf.c mmc_format.c curl.c freopen.c opendir.c remove.c motor.c command.c gmtime_r.c wait_motion.c irled.c audio_play.c mp4write.c
 TARGET = libcallback.so
 
 all: ${TARGET}

libcallback_wz_mod/command.c

@@ -21,6 +21,7 @@ extern char *MotorMove(int fd, char *tokenPtr);
 extern char *WaitMotion(int fd, char *tokenPtr);
 extern char *IrLed(int fd, char *tokenPtr);
 extern char *AudioPlay(int fd, char *tokenPtr);
+extern char *mp4Write(int fd, char *tokenPtr);
 
 struct CommandTableSt {
   const char *cmd;
@@ -35,6 +36,8 @@ struct CommandTableSt CommandTable[] = {
   { "waitMotion", &WaitMotion },
   { "irled",      &IrLed },
   { "aplay",      &AudioPlay },
+  { "mp4write",      &mp4Write },
+
 };
 
 void CommandResponse(int fd, const char *res) {

libcallback_wz_mod/mp4write.c

@@ -0,0 +1,53 @@
+#include <dlfcn.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int (*original_mp4write_start_handler)(void *handler, char *file, void *config);
+
+static int mp4WriteEnable = 0;
+
+char *mp4Write(int fd, char *tokenPtr) {
+
+  char *p = strtok_r(NULL, " \t\r\n", &tokenPtr);
+  if(!p) return mp4WriteEnable ? "on" : "off";
+  if(!strcmp(p, "on")) {
+    mp4WriteEnable = 1;
+    fprintf(stderr, "[command] mp4write on\n", p);
+    return "ok";
+  }
+  if(!strcmp(p, "off")) {
+    mp4WriteEnable = 0;
+    fprintf(stderr, "[command] mp4write off\n", p);
+    return "ok";
+  }
+  return "error in mp4write.c";
+}
+
+int mp4write_start_handler(void *handler, char *file, void *config) {
+
+if(mp4WriteEnable) {
+
+struct stat st = {0};
+
+  if(!strncmp(file, "/tmp/", 5)) {
+    char buf[64];
+    strncpy(buf, file + 5, 30);
+    if (stat("/media/mmc/record/tmp", &st) == -1) {
+      mkdir("/media/mmc/record/tmp", 0700);
+    }
+    strcpy(file, "/media/mmc/record/tmp/");
+    strcat(file, buf);
+  }
+}
+  return (original_mp4write_start_handler)(handler, file, config);
+}
+static void __attribute ((constructor)) mp4write_init(void) {
+
+  original_mp4write_start_handler = dlsym(dlopen("/system/lib/libmp4rw.so", RTLD_LAZY), "mp4write_start_handler");
+}