lavc/mediacodec_wrapper: factorize MediaCodec creation functions

libavcodec/mediacodec_wrapper.c

@@ -1132,13 +1132,18 @@ fail:
     return ret;
 }
 
-FFAMediaCodec* ff_AMediaCodec_createCodecByName(const char *name)
+#define CREATE_CODEC_BY_NAME   0
+#define CREATE_DECODER_BY_TYPE 1
+#define CREATE_ENCODER_BY_TYPE 2
+
+static inline FFAMediaCodec *codec_create(int method, const char *arg)
 {
     int ret = -1;
     JNIEnv *env = NULL;
     FFAMediaCodec *codec = NULL;
-    jstring codec_name = NULL;
+    jstring jarg = NULL;
     jobject object = NULL;
+    jmethodID create_id = NULL;
 
     codec = av_mallocz(sizeof(FFAMediaCodec));
     if (!codec) {
@@ -1156,77 +1161,23 @@ FFAMediaCodec* ff_AMediaCodec_createCodecByName(const char *name)
         goto fail;
     }
 
-    codec_name = ff_jni_utf_chars_to_jstring(env, name, codec);
-    if (!codec_name) {
-        goto fail;
-    }
-
-    object = (*env)->CallStaticObjectMethod(env, codec->jfields.mediacodec_class, codec->jfields.create_by_codec_name_id, codec_name);
-    if (ff_jni_exception_check(env, 1, codec) < 0) {
-        goto fail;
-    }
-
-    codec->object = (*env)->NewGlobalRef(env, object);
-    if (!codec->object) {
-        goto fail;
-    }
-
-    if (codec_init_static_fields(codec) < 0) {
-        goto fail;
-    }
-
-    if (codec->jfields.get_input_buffer_id && codec->jfields.get_output_buffer_id) {
-        codec->has_get_i_o_buffer = 1;
-    }
-
-    ret = 0;
-fail:
-    if (codec_name) {
-        (*env)->DeleteLocalRef(env, codec_name);
-    }
-
-    if (object) {
-        (*env)->DeleteLocalRef(env, object);
-    }
-
-    if (ret < 0) {
-        ff_jni_reset_jfields(env, &codec->jfields, jni_amediacodec_mapping, 1, codec);
-        av_freep(&codec);
-    }
-
-    return codec;
-}
-
-FFAMediaCodec* ff_AMediaCodec_createDecoderByType(const char *mime)
-{
-    int ret = -1;
-    JNIEnv *env = NULL;
-    FFAMediaCodec *codec = NULL;
-    jstring mime_type = NULL;
-    jobject object = NULL;
-
-    codec = av_mallocz(sizeof(FFAMediaCodec));
-    if (!codec) {
-        return NULL;
-    }
-    codec->class = &amediacodec_class;
-
-    env = ff_jni_get_env(codec);
-    if (!env) {
-        av_freep(&codec);
-        return NULL;
-    }
-
-    if (ff_jni_init_jfields(env, &codec->jfields, jni_amediacodec_mapping, 1, codec) < 0) {
+    jarg = ff_jni_utf_chars_to_jstring(env, arg, codec);
+    if (!jarg) {
         goto fail;
     }
 
-    mime_type = ff_jni_utf_chars_to_jstring(env, mime, codec);
-    if (!mime_type) {
-        goto fail;
+    switch (method) {
+    case CREATE_CODEC_BY_NAME:   create_id = codec->jfields.create_by_codec_name_id;   break;
+    case CREATE_DECODER_BY_TYPE: create_id = codec->jfields.create_decoder_by_type_id; break;
+    case CREATE_ENCODER_BY_TYPE: create_id = codec->jfields.create_encoder_by_type_id; break;
+    default:
+        av_assert0(0);
     }
 
-    object = (*env)->CallStaticObjectMethod(env, codec->jfields.mediacodec_class, codec->jfields.create_decoder_by_type_id, mime_type);
+    object = (*env)->CallStaticObjectMethod(env,
+                                            codec->jfields.mediacodec_class,
+                                            create_id,
+                                            jarg);
     if (ff_jni_exception_check(env, 1, codec) < 0) {
         goto fail;
     }
@@ -1246,8 +1197,8 @@ FFAMediaCodec* ff_AMediaCodec_createDecoderByType(const char *mime)
 
     ret = 0;
 fail:
-    if (mime_type) {
-        (*env)->DeleteLocalRef(env, mime_type);
+    if (jarg) {
+        (*env)->DeleteLocalRef(env, jarg);
     }
 
     if (object) {
@@ -1262,70 +1213,15 @@ fail:
     return codec;
 }
 
-FFAMediaCodec* ff_AMediaCodec_createEncoderByType(const char *mime)
-{
-    int ret = -1;
-    JNIEnv *env = NULL;
-    FFAMediaCodec *codec = NULL;
-    jstring mime_type = NULL;
-    jobject object = NULL;
+#define DECLARE_FF_AMEDIACODEC_CREATE_FUNC(name, method) \
+FFAMediaCodec *ff_AMediaCodec_##name(const char *arg)    \
+{                                                        \
+    return codec_create(method, arg);                    \
+}                                                        \
 
-    codec = av_mallocz(sizeof(FFAMediaCodec));
-    if (!codec) {
-        return NULL;
-    }
-    codec->class = &amediacodec_class;
-
-    env = ff_jni_get_env(codec);
-    if (!env) {
-        av_freep(&codec);
-        return NULL;
-    }
-
-    if (ff_jni_init_jfields(env, &codec->jfields, jni_amediacodec_mapping, 1, codec) < 0) {
-        goto fail;
-    }
-
-    mime_type = ff_jni_utf_chars_to_jstring(env, mime, codec);
-    if (!mime_type) {
-        goto fail;
-    }
-
-    object = (*env)->CallStaticObjectMethod(env, codec->jfields.mediacodec_class, codec->jfields.create_encoder_by_type_id, mime_type);
-    if (ff_jni_exception_check(env, 1, codec) < 0) {
-        goto fail;
-    }
-
-    codec->object = (*env)->NewGlobalRef(env, object);
-    if (!codec->object) {
-        goto fail;
-    }
-
-    if (codec_init_static_fields(codec) < 0) {
-        goto fail;
-    }
-
-    if (codec->jfields.get_input_buffer_id && codec->jfields.get_output_buffer_id) {
-        codec->has_get_i_o_buffer = 1;
-    }
-
-    ret = 0;
-fail:
-    if (mime_type) {
-        (*env)->DeleteLocalRef(env, mime_type);
-    }
-
-    if (object) {
-        (*env)->DeleteLocalRef(env, object);
-    }
-
-    if  (ret < 0) {
-        ff_jni_reset_jfields(env, &codec->jfields, jni_amediacodec_mapping, 1, codec);
-        av_freep(&codec);
-    }
-
-    return codec;
-}
+DECLARE_FF_AMEDIACODEC_CREATE_FUNC(createCodecByName,   CREATE_CODEC_BY_NAME)
+DECLARE_FF_AMEDIACODEC_CREATE_FUNC(createDecoderByType, CREATE_DECODER_BY_TYPE)
+DECLARE_FF_AMEDIACODEC_CREATE_FUNC(createEncoderByType, CREATE_ENCODER_BY_TYPE)
 
 int ff_AMediaCodec_delete(FFAMediaCodec* codec)
 {