基于全志A133 修改tinyplay工具源码（解决生产工具通过adb shell调用tinyplay工具循环播放.wav音频，并且执行完指令后脱离终端） - Android10

源码

一、修改Android.bp源码 - - 将tinyplay.c编译成静态可执行文件

  将对应的Android.bp文件中添加 static_executable: true, 即可。

二、修改tinyplay.c源码

1、通过输入的参数控制循环播放次数

  上图修改就是实现音频循环的关键了，下面就需要通过参数调用这个函数实现循环播放次数了。

2、使用守护进程使adb shell执行tinyplay工具脱离终端

  原因：因为生产工具使用的使adb shell执行tinyplay工具来播放对应的wav格式的音频文件，而执行adb shell指令播放音频需要播放完毕后才会退出adb shell，这样就导致生产工具执行不能边播放音频，边执行下一条指令了，因此需要执行tinyplay工具时，让其成为守护进程，脱离终端，那么adb shell就会退出，此时生产工具才能执行下一条指令，不会被阻塞。
  以下是我之前写的博客，有对守护进程相关的讲解。
博客链接

三、源码修改补丁

diff --git a/android/external/tinyalsa/Android.bp b/android/external/tinyalsa/Android.bp
index 090d91c0f8..f8ab2516a9 100644
--- a/android/external/tinyalsa/Android.bp
+++ b/android/external/tinyalsa/Android.bp
@@ -24,8 +24,10 @@ cc_binary {
   
     name: "tinyplay",
     host_supported: true,
     srcs: ["tinyplay.c"],
-    shared_libs: ["libtinyalsa"],
+    static_libs: ["libtinyalsa"],
+	stl: "libc++_static",
     cflags: ["-Werror"],
+	static_executable: true,
     target: {
   
         darwin: {
   
             enabled: false,
@@ -36,27 +38,31 @@ cc_binary {
   
 cc_binary {
   
     name: "tinycap",
     srcs: ["tinycap.c"],
-    shared_libs: ["libtinyalsa"],
+    static_libs: ["libtinyalsa"],
     cflags: ["-Werror"],
+	static_executable: true,
 }
 
 cc_binary {
   
     name: "tinymix",
     srcs: ["tinymix.c"],
-    shared_libs: ["libtinyalsa"],
+    static_libs: ["libtinyalsa"],
     cflags: ["-Werror", "-Wall"],
+	static_executable: true,
 }
 
 cc_binary {
   
     name: "tinyhostless",
     srcs: ["tinyhostless.c"],
-    shared_libs: ["libtinyalsa"],
+    static_libs: ["libtinyalsa"],
     cflags: ["-Werror"],
+	static_executable: true,
 }
 
 cc_binary {
   
     name: "tinypcminfo",
     srcs: ["tinypcminfo.c"],
-    shared_libs: ["libtinyalsa"],
+    static_libs: ["libtinyalsa"],
     cflags: ["-Werror"],
+	static_executable: true,
 }
diff --git a/android/external/tinyalsa/tinyplay.c b/android/external/tinyalsa/tinyplay.c
index 0354df6cb8..702b1f677d 100644
--- a/android/external/tinyalsa/tinyplay.c
+++ b/android/external/tinyalsa/tinyplay.c
@@ -33,6 +33,10 @@
 #include <string.h>
 #include <signal.h>
 #include <endian.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/stat.h>
 
 #define ID_RIFF 0x46464952
 #define ID_WAVE 0x45564157
@@ -59,17 +63,17 @@ struct chunk_fmt {
   
     uint16_t bits_per_sample;
 };
 
-static int close = 0;
+static int tiny_close = 0;
 
 void play_sample(FILE *file, unsigned int card, unsigned int device, unsigned