camera3: Pass vendor tags through binder.

Bug: 12134423

- Adds a class for parceling vendor tag definitions.
- Passes vendor tag definitions to clients of the camera service.
- Switches over to new vendor tag mechanism when reading from HAL.

Change-Id: Icef3fe9e67160767bdb8244ac49c85b68b497123

1 files changed, 319 insertions, 0 deletions

diff --git a/camera/VendorTagDescriptor.cpp b/camera/VendorTagDescriptor.cpp
new file mode 100644
index 0000000..89b0ea8
--- /dev/null
+++ b/camera/VendorTagDescriptor.cpp
@@ -0,0 +1,319 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "VenderTagDescriptor"
+
+#include <binder/Parcel.h>
+#include <utils/Errors.h>
+#include <utils/Log.h>
+#include <utils/Mutex.h>
+#include <utils/Vector.h>
+#include <system/camera_metadata.h>
+#include <camera_metadata_hidden.h>
+
+#include "camera/VendorTagDescriptor.h"
+
+#include <string.h>
+
+namespace android {
+
+extern "C" {
+
+static int vendor_tag_descriptor_get_tag_count(const vendor_tag_ops_t* v);
+static void vendor_tag_descriptor_get_all_tags(const vendor_tag_ops_t* v, uint32_t* tagArray);
+static const char* vendor_tag_descriptor_get_section_name(const vendor_tag_ops_t* v, uint32_t tag);
+static const char* vendor_tag_descriptor_get_tag_name(const vendor_tag_ops_t* v, uint32_t tag);
+static int vendor_tag_descriptor_get_tag_type(const vendor_tag_ops_t* v, uint32_t tag);
+
+} /* extern "C" */
+
+
+static Mutex sLock;
+static sp<VendorTagDescriptor> sGlobalVendorTagDescriptor;
+
+VendorTagDescriptor::VendorTagDescriptor() {}
+VendorTagDescriptor::~VendorTagDescriptor() {}
+
+status_t VendorTagDescriptor::createDescriptorFromOps(const vendor_tag_ops_t* vOps,
+            /*out*/
+            sp<VendorTagDescriptor>& descriptor) {
+    if (vOps == NULL) {
+        ALOGE("%s: vendor_tag_ops argument was NULL.", __FUNCTION__);
+        return BAD_VALUE;
+    }
+
+    int tagCount = vOps->get_tag_count(vOps);
+    if (tagCount < 0 || tagCount > INT32_MAX) {
+        ALOGE("%s: tag count %d from vendor ops is invalid.", __FUNCTION__, tagCount);
+        return BAD_VALUE;
+    }
+
+    Vector<uint32_t> tagArray;
+    LOG_ALWAYS_FATAL_IF(tagArray.resize(tagCount) != tagCount,
+            "%s: too many (%u) vendor tags defined.", __FUNCTION__, tagCount);
+
+    vOps->get_all_tags(vOps, /*out*/tagArray.editArray());
+
+    sp<VendorTagDescriptor> desc = new VendorTagDescriptor();
+    desc->mTagCount = tagCount;
+
+    for (size_t i = 0; i < static_cast<size_t>(tagCount); ++i) {
+        uint32_t tag = tagArray[i];
+        if (tag < CAMERA_METADATA_VENDOR_TAG_BOUNDARY) {
+            ALOGE("%s: vendor tag %d not in vendor tag section.", __FUNCTION__, tag);
+            return BAD_VALUE;
+        }
+        const char *tagName = vOps->get_tag_name(vOps, tag);
+        if (tagName == NULL) {
+            ALOGE("%s: no tag name defined for vendor tag %d.", __FUNCTION__, tag);
+            return BAD_VALUE;
+        }
+        desc->mTagToNameMap.add(tag, String8(tagName));
+        const char *sectionName = vOps->get_section_name(vOps, tag);
+        if (sectionName == NULL) {
+            ALOGE("%s: no section name defined for vendor tag %d.", __FUNCTION__, tag);
+            return BAD_VALUE;
+        }
+        desc->mTagToSectionMap.add(tag, String8(sectionName));
+        int tagType = vOps->get_tag_type(vOps, tag);
+        if (tagType < 0 || tagType >= NUM_TYPES) {
+            ALOGE("%s: tag type %d from vendor ops does not exist.", __FUNCTION__, tagType);
+            return BAD_VALUE;
+        }
+        desc->mTagToTypeMap.add(tag, tagType);
+    }
+    descriptor = desc;
+    return OK;
+}
+
+status_t VendorTagDescriptor::createFromParcel(const Parcel* parcel,
+            /*out*/
+            sp<VendorTagDescriptor>& descriptor) {
+    status_t res = OK;
+    if (parcel == NULL) {
+        ALOGE("%s: parcel argument was NULL.", __FUNCTION__);
+        return BAD_VALUE;
+    }
+
+    int32_t tagCount = 0;
+    if ((res = parcel->readInt32(&tagCount)) != OK) {
+        ALOGE("%s: could not read tag count from parcel", __FUNCTION__);
+        return res;
+    }
+
+    if (tagCount < 0 || tagCount > INT32_MAX) {
+        ALOGE("%s: tag count %d from vendor ops is invalid.", __FUNCTION__, tagCount);
+        return BAD_VALUE;
+    }
+
+    sp<VendorTagDescriptor> desc = new VendorTagDescriptor();
+    desc->mTagCount = tagCount;
+
+    uint32_t tag;
+    int32_t tagType;
+    for (int32_t i = 0; i < tagCount; ++i) {
+        if ((res = parcel->readInt32(reinterpret_cast<int32_t*>(&tag))) != OK) {
+            ALOGE("%s: could not read tag id from parcel for index %d", __FUNCTION__, i);
+            break;
+        }
+        if (tag < CAMERA_METADATA_VENDOR_TAG_BOUNDARY) {
+            ALOGE("%s: vendor tag %d not in vendor tag section.", __FUNCTION__, tag);
+            res = BAD_VALUE;
+            break;
+        }
+        if ((res = parcel->readInt32(&tagType)) != OK) {
+            ALOGE("%s: could not read tag type from parcel for tag %d", __FUNCTION__, tag);
+            break;
+        }
+        if (tagType < 0 || tagType >= NUM_TYPES) {
+            ALOGE("%s: tag type %d from vendor ops does not exist.", __FUNCTION__, tagType);
+            res = BAD_VALUE;
+            break;
+        }
+        String8 tagName = parcel->readString8();
+        if (tagName.isEmpty()) {
+            ALOGE("%s: parcel tag name was NULL for tag %d.", __FUNCTION__, tag);
+            res = NOT_ENOUGH_DATA;
+            break;
+        }
+        String8 sectionName = parcel->readString8();
+        if (sectionName.isEmpty()) {
+            ALOGE("%s: parcel section name was NULL for tag %d.", __FUNCTION__, tag);
+            res = NOT_ENOUGH_DATA;
+            break;
+        }
+
+        desc->mTagToNameMap.add(tag, tagName);
+        desc->mTagToSectionMap.add(tag, sectionName);
+        desc->mTagToTypeMap.add(tag, tagType);
+    }
+
+    if (res != OK) {
+        return res;
+    }
+
+    descriptor = desc;
+    return res;
+}
+
+int VendorTagDescriptor::getTagCount() const {
+    size_t size = mTagToNameMap.size();
+    if (size == 0) {
+        return VENDOR_TAG_COUNT_ERR;
+    }
+    return size;
+}
+
+void VendorTagDescriptor::getTagArray(uint32_t* tagArray) const {
+    size_t size = mTagToNameMap.size();
+    for (size_t i = 0; i < size; ++i) {
+        tagArray[i] = mTagToNameMap.keyAt(i);
+    }
+}
+
+const char* VendorTagDescriptor::getSectionName(uint32_t tag) const {
+    ssize_t index = mTagToSectionMap.indexOfKey(tag);
+    if (index < 0) {
+        return VENDOR_SECTION_NAME_ERR;
+    }
+    return mTagToSectionMap.valueAt(index).string();
+}
+
+const char* VendorTagDescriptor::getTagName(uint32_t tag) const {
+    ssize_t index = mTagToNameMap.indexOfKey(tag);
+    if (index < 0) {
+        return VENDOR_TAG_NAME_ERR;
+    }
+    return mTagToNameMap.valueAt(index).string();
+}
+
+int VendorTagDescriptor::getTagType(uint32_t tag) const {
+    ssize_t index = mTagToNameMap.indexOfKey(tag);
+    if (index < 0) {
+        return VENDOR_TAG_TYPE_ERR;
+    }
+    return mTagToTypeMap.valueFor(tag);
+}
+
+status_t VendorTagDescriptor::writeToParcel(Parcel* parcel) const {
+    status_t res = OK;
+    if (parcel == NULL) {
+        ALOGE("%s: parcel argument was NULL.", __FUNCTION__);
+        return BAD_VALUE;
+    }
+
+    if ((res = parcel->writeInt32(mTagCount)) != OK) {
+        return res;
+    }
+
+    size_t size = mTagToNameMap.size();
+    uint32_t tag;
+    int32_t tagType;
+    for (size_t i = 0; i < size; ++i) {
+        tag = mTagToNameMap.keyAt(i);
+        String8 tagName = mTagToNameMap[i];
+        String8 sectionName = mTagToSectionMap.valueFor(tag);
+        tagType = mTagToTypeMap.valueFor(tag);
+        if ((res = parcel->writeInt32(tag)) != OK) break;
+        if ((res = parcel->writeInt32(tagType)) != OK) break;
+        if ((res = parcel->writeString8(tagName)) != OK) break;
+        if ((res = parcel->writeString8(sectionName)) != OK) break;
+    }
+
+    return res;
+}
+
+status_t VendorTagDescriptor::setAsGlobalVendorTagDescriptor(sp<VendorTagDescriptor>& desc) {
+    status_t res = OK;
+    Mutex::Autolock al(sLock);
+    sGlobalVendorTagDescriptor = desc;
+
+    vendor_tag_ops_t* opsPtr = NULL;
+    if (desc != NULL) {
+        opsPtr = &(desc->mVendorOps);
+        opsPtr->get_tag_count = vendor_tag_descriptor_get_tag_count;
+        opsPtr->get_all_tags = vendor_tag_descriptor_get_all_tags;
+        opsPtr->get_section_name = vendor_tag_descriptor_get_section_name;
+        opsPtr->get_tag_name = vendor_tag_descriptor_get_tag_name;
+        opsPtr->get_tag_type = vendor_tag_descriptor_get_tag_type;
+    }
+    if((res = set_camera_metadata_vendor_ops(opsPtr)) != OK) {
+        ALOGE("%s: Could not set vendor tag descriptor, received error %s (%d)."
+                , __FUNCTION__, strerror(-res), res);
+    }
+    return res;
+}
+
+void VendorTagDescriptor::clearGlobalVendorTagDescriptor() {
+    Mutex::Autolock al(sLock);
+    set_camera_metadata_vendor_ops(NULL);
+    sGlobalVendorTagDescriptor.clear();
+}
+
+sp<VendorTagDescriptor> VendorTagDescriptor::getGlobalVendorTagDescriptor() {
+    Mutex::Autolock al(sLock);
+    return sGlobalVendorTagDescriptor;
+}
+
+extern "C" {
+
+int vendor_tag_descriptor_get_tag_count(const vendor_tag_ops_t* v) {
+    Mutex::Autolock al(sLock);
+    if (sGlobalVendorTagDescriptor == NULL) {
+        ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
+        return VENDOR_TAG_COUNT_ERR;
+    }
+    return sGlobalVendorTagDescriptor->getTagCount();
+}
+
+void vendor_tag_descriptor_get_all_tags(const vendor_tag_ops_t* v, uint32_t* tagArray) {
+    Mutex::Autolock al(sLock);
+    if (sGlobalVendorTagDescriptor == NULL) {
+        ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
+        return;
+    }
+    sGlobalVendorTagDescriptor->getTagArray(tagArray);
+}
+
+const char* vendor_tag_descriptor_get_section_name(const vendor_tag_ops_t* v, uint32_t tag) {
+    Mutex::Autolock al(sLock);
+    if (sGlobalVendorTagDescriptor == NULL) {
+        ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
+        return VENDOR_SECTION_NAME_ERR;
+    }
+    return sGlobalVendorTagDescriptor->getSectionName(tag);
+}
+
+const char* vendor_tag_descriptor_get_tag_name(const vendor_tag_ops_t* v, uint32_t tag) {
+    Mutex::Autolock al(sLock);
+    if (sGlobalVendorTagDescriptor == NULL) {
+        ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
+        return VENDOR_TAG_NAME_ERR;
+    }
+    return sGlobalVendorTagDescriptor->getTagName(tag);
+}
+
+int vendor_tag_descriptor_get_tag_type(const vendor_tag_ops_t* v, uint32_t tag) {
+    Mutex::Autolock al(sLock);
+    if (sGlobalVendorTagDescriptor == NULL) {
+        ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
+        return VENDOR_TAG_TYPE_ERR;
+    }
+    return sGlobalVendorTagDescriptor->getTagType(tag);
+}
+
+} /* extern "C" */
+} /* namespace android */