redirect to print FFmpeg log

redirect to print FFmpeg log

app/src/main/cpp/ffmpeg_cmd.c

@@ -2,7 +2,21 @@
 #include "ffmpeg/ffmpeg.h"
 #include "ffmpeg_jni_define.h"
 
+#define FFMPEG_TAG "FFmpegCmd"
+
+#define ALOGI(TAG, FORMAT, ...) __android_log_vprint(ANDROID_LOG_INFO, TAG, FORMAT, ##__VA_ARGS__);
+#define ALOGE(TAG, FORMAT, ...) __android_log_vprint(ANDROID_LOG_ERROR, TAG, FORMAT, ##__VA_ARGS__);
+#define ALOGW(TAG, FORMAT, ...) __android_log_vprint(ANDROID_LOG_WARN, TAG, FORMAT, ##__VA_ARGS__);
+#define ALOGD(TAG, FORMAT, ...) __android_log_vprint(ANDROID_LOG_DEBUG, TAG, FORMAT, ##__VA_ARGS__);
+
+void log_callback(void*, int, const char*, va_list);
+
 FFMPEG_FUNC(jint, handle, jobjectArray commands) {
+    // set the level of log
+    av_log_set_level(AV_LOG_INFO);
+    // set the callback of log, and redirect to print android log
+    av_log_set_callback(log_callback);
+
     int argc = (*env)->GetArrayLength(env, commands);
     char **argv = (char **) malloc(argc * sizeof(char *));
     int i;
@@ -23,3 +37,23 @@ FFMPEG_FUNC(jint, handle, jobjectArray commands) {
     free(argv);
     return result;
 }
+
+void log_callback(void* ptr, int level, const char* format, va_list args) {
+    switch (level) {
+        case AV_LOG_DEBUG:
+            ALOGD(FFMPEG_TAG, format, args);
+            break;
+        case AV_LOG_WARNING:
+            ALOGW(FFMPEG_TAG, format, args);
+            break;
+        case AV_LOG_INFO:
+            ALOGI(FFMPEG_TAG, format, args);
+            break;
+        case AV_LOG_ERROR:
+            ALOGE(FFMPEG_TAG, format, args);
+            break;
+        default:
+            ALOGI(FFMPEG_TAG, format, args);
+            break;
+    }
+}