YUV420sp与YUV420p互转
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; }
原文链接:https://blog.csdn.net/Emily2015/article/details/79271199