modules: camera: add vendor tag functionality

Vendor Tag operations were added in module api v2.2

Change-Id: I352a50759d8bb9389d904bb774659e4be883794b

1 files changed, 188 insertions, 0 deletions

diff --git a/modules/camera/VendorTags.cpp b/modules/camera/VendorTags.cpp
new file mode 100644
index 0000000..58bd606
--- /dev/null
+++ b/modules/camera/VendorTags.cpp
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2013 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.
+ */
+
+#include <system/camera_metadata.h>
+#include "Metadata.h"
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "VendorTags"
+#include <cutils/log.h>
+
+#define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
+#include <utils/Trace.h>
+
+#include "VendorTags.h"
+
+namespace default_camera_hal {
+
+// Internal representations of vendor tags for convenience.
+// Other classes must access this data via public interfaces.
+// Structured to be easy to extend and contain complexity.
+namespace {
+// Describes a single vendor tag entry
+struct Entry {
+    const char* name;
+    uint8_t     type;
+};
+// Describes a vendor tag section
+struct Section {
+    const char* name;
+    uint32_t start;
+    uint32_t end;
+    const Entry* tags;
+};
+
+// Entry arrays for each section
+const Entry DemoWizardry[DEMO_WIZARDRY_END - DEMO_WIZARDRY_START] = {
+    [DEMO_WIZARDRY_DIMENSION_SIZE - DEMO_WIZARDRY_START] =
+        {"dimensionSize",   TYPE_INT32},
+    [DEMO_WIZARDRY_DIMENSIONS - DEMO_WIZARDRY_START] =
+        {"dimensions",      TYPE_INT32},
+    [DEMO_WIZARDRY_FAMILIAR - DEMO_WIZARDRY_START] =
+        {"familiar",        TYPE_BYTE},
+    [DEMO_WIZARDRY_FIRE - DEMO_WIZARDRY_START] =
+        {"fire",            TYPE_RATIONAL}
+};
+
+const Entry DemoSorcery[DEMO_SORCERY_END - DEMO_SORCERY_START] = {
+    [DEMO_SORCERY_DIFFICULTY - DEMO_SORCERY_START] =
+        {"difficulty",      TYPE_INT64},
+    [DEMO_SORCERY_LIGHT - DEMO_SORCERY_START] =
+        {"light",           TYPE_BYTE}
+};
+
+const Entry DemoMagic[DEMO_MAGIC_END - DEMO_MAGIC_START] = {
+    [DEMO_MAGIC_CARD_TRICK - DEMO_MAGIC_START] =
+        {"cardTrick",       TYPE_DOUBLE},
+    [DEMO_MAGIC_LEVITATION - DEMO_MAGIC_START] =
+        {"levitation",      TYPE_FLOAT}
+};
+
+// Array of all sections
+const Section DemoSections[DEMO_SECTION_COUNT] = {
+    [DEMO_WIZARDRY] = { "demo.wizardry",
+                        DEMO_WIZARDRY_START,
+                        DEMO_WIZARDRY_END,
+                        DemoWizardry },
+    [DEMO_SORCERY]  = { "demo.sorcery",
+                        DEMO_SORCERY_START,
+                        DEMO_SORCERY_END,
+                        DemoSorcery },
+    [DEMO_MAGIC]    = { "demo.magic",
+                        DEMO_MAGIC_START,
+                        DEMO_MAGIC_END,
+                        DemoMagic }
+};
+
+// Get a static handle to a specific vendor tag section
+const Section* getSection(uint32_t tag)
+{
+    uint32_t section = (tag - VENDOR_SECTION_START) >> 16;
+
+    if (tag < VENDOR_SECTION_START) {
+        ALOGE("%s: Tag 0x%x before vendor section", __func__, tag);
+        return NULL;
+    }
+
+    if (section >= DEMO_SECTION_COUNT) {
+        ALOGE("%s: Tag 0x%x after vendor section", __func__, tag);
+        return NULL;
+    }
+
+    return &DemoSections[section];
+}
+
+// Get a static handle to a specific vendor tag entry
+const Entry* getEntry(uint32_t tag)
+{
+    const Section* section = getSection(tag);
+    int index;
+
+    if (section == NULL)
+        return NULL;
+
+    if (tag >= section->end) {
+        ALOGE("%s: Tag 0x%x outside section", __func__, tag);
+        return NULL;
+    }
+
+    index = tag - section->start;
+    return &section->tags[index];
+}
+} // namespace
+
+VendorTags::VendorTags()
+  : mTagCount(0)
+{
+    for (int i = 0; i < DEMO_SECTION_COUNT; i++) {
+        mTagCount += DemoSections[i].end - DemoSections[i].start;
+    }
+}
+
+VendorTags::~VendorTags()
+{
+}
+
+int VendorTags::getTagCount(const vendor_tag_ops_t* ops)
+{
+    return mTagCount;
+}
+
+void VendorTags::getAllTags(const vendor_tag_ops_t* ops, uint32_t* tag_array)
+{
+    if (tag_array == NULL) {
+        ALOGE("%s: NULL tag_array", __func__);
+        return;
+    }
+
+    for (int i = 0; i < DEMO_SECTION_COUNT; i++) {
+        for (uint32_t tag = DemoSections[i].start;
+                tag < DemoSections[i].end; tag++) {
+            *tag_array++ = tag;
+        }
+    }
+}
+
+const char* VendorTags::getSectionName(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    const Section* section = getSection(tag);
+
+    if (section == NULL)
+        return NULL;
+
+    return section->name;
+}
+
+const char* VendorTags::getTagName(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    const Entry* entry = getEntry(tag);
+
+    if (entry == NULL)
+        return NULL;
+
+    return entry->name;
+}
+
+int VendorTags::getTagType(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    const Entry* entry = getEntry(tag);
+
+    if (entry == NULL)
+        return -1;
+
+    return entry->type;
+}
+} // namespace default_camera_hal