yuv420sp转yuv420p
JNIEXPORT jbyteArray JNICALL
Java_com_uestc_smileteeth_view_recordvideo_RecordVideoLib_YUV420spToYUV420p(JNIEnv *env,
jclass type,
jbyteArray yuv420sp_,
jint width,
jint height) {
jbyte *yuv420sp = (*env)->GetByteArrayElements(env, yuv420sp_, NULL);
jbyteArray yuv420pRet = (*env)->NewByteArray(env, (*env)->GetArrayLength(env, yuv420sp_));
jbyte *yuv420p = (*env)->GetByteArrayElements(env, yuv420pRet, NULL);
int i, j;
int y_size = width * height;
unsigned char *y = yuv420sp;
unsigned char *vu = yuv420sp + y_size;
unsigned char *y_tmp = yuv420p;
unsigned char *u_tmp = yuv420p + y_size;
unsigned char *v_tmp = yuv420p + y_size * 5 / 4;
// y
memcpy(y_tmp, y, y_size);
// v,u
for (j = 0, i = 0; j < y_size / 2; j += 2, i++) {
v_tmp[i] = vu[j];
u_tmp[i] = vu[j + 1];
}
(*env)->ReleaseByteArrayElements(env, yuv420sp_, yuv420sp, 0);
(*env)->ReleaseByteArrayElements(env, yuv420pRet, yuv420p, 0);
return yuv420pRet;
}
yuv420p转yuv420sp
JNIEXPORT jbyteArray JNICALL
Java_com_uestc_smileteeth_view_recordvideo_RecordVideoLib_YUV420pToYUV420sp(JNIEnv *env,
jclass type,
jbyteArray yuv420p_,
jint width,
jint height) {
jbyte *yuv420p = (*env)->GetByteArrayElements(env, yuv420p_, NULL);
jbyteArray yuv420spRet = (*env)->NewByteArray(env, (*env)->GetArrayLength(env, yuv420p_));
jbyte *yuv420sp = (*env)->GetByteArrayElements(env, yuv420spRet, NULL);
int i, j;
int y_size = width * height;
unsigned char *y = yuv420sp;
unsigned char *vu = yuv420sp + y_size;
unsigned char *y_tmp = yuv420p;
unsigned char *u_tmp = yuv420p + y_size;
unsigned char *v_tmp = yuv420p + y_size * 5 / 4;
// y
memcpy(y, y_tmp, y_size);
// v,u
for (j = 0, i = 0; j < y_size / 2; j += 2, i++) {
vu[j] = v_tmp[i];
vu[j + 1] = u_tmp[i];
}
(*env)->ReleaseByteArrayElements(env, yuv420p_, yuv420p, 0);
(*env)->ReleaseByteArrayElements(env, yuv420spRet, yuv420sp, 0);
return yuv420spRet;
}