diff options
Diffstat (limited to 'src/android/metadata/camera_metadata.c')
| -rw-r--r-- | src/android/metadata/camera_metadata.c | 1204 |
1 files changed, 1204 insertions, 0 deletions
diff --git a/src/android/metadata/camera_metadata.c b/src/android/metadata/camera_metadata.c new file mode 100644 index 00000000..6bfd02da --- /dev/null +++ b/src/android/metadata/camera_metadata.c @@ -0,0 +1,1204 @@ +/* + * Copyright (C) 2012 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 "camera_metadata" + +/* + * Replace ALOGE() with a fprintf to stderr so that we don't need to + * re-implement Android's logging system. The log/log.h header file is no + * longer necessary once we removed dependency on ALOGE(). + */ +#define ALOGE(...) fprintf(stderr, LOG_TAG __VA_ARGS__) + +#include <system/camera_metadata.h> +#include <camera_metadata_hidden.h> + +#include <assert.h> +#include <errno.h> +#include <inttypes.h> +#include <stddef.h> // for offsetof +#include <stdio.h> +#include <stdlib.h> + +#define OK 0 +#define ERROR 1 +#define NOT_FOUND (-ENOENT) +#define SN_EVENT_LOG_ID 0x534e4554 + +#define ALIGN_TO(val, alignment) \ + (((uintptr_t)(val) + ((alignment) - 1)) & ~((alignment) - 1)) + +/** + * A single metadata entry, storing an array of values of a given type. If the + * array is no larger than 4 bytes in size, it is stored in the data.value[] + * array; otherwise, it can found in the parent's data array at index + * data.offset. + */ +#define ENTRY_ALIGNMENT ((size_t) 4) +typedef struct camera_metadata_buffer_entry { + uint32_t tag; + uint32_t count; + union { + uint32_t offset; + uint8_t value[4]; + } data; + uint8_t type; + uint8_t reserved[3]; +} camera_metadata_buffer_entry_t; + +typedef uint32_t metadata_uptrdiff_t; +typedef uint32_t metadata_size_t; + +/** + * A packet of metadata. This is a list of entries, each of which may point to + * its values stored at an offset in data. + * + * It is assumed by the utility functions that the memory layout of the packet + * is as follows: + * + * |-----------------------------------------------| + * | camera_metadata_t | + * | | + * |-----------------------------------------------| + * | reserved for future expansion | + * |-----------------------------------------------| + * | camera_metadata_buffer_entry_t #0 | + * |-----------------------------------------------| + * | .... | + * |-----------------------------------------------| + * | camera_metadata_buffer_entry_t #entry_count-1 | + * |-----------------------------------------------| + * | free space for | + * | (entry_capacity-entry_count) entries | + * |-----------------------------------------------| + * | start of camera_metadata.data | + * | | + * |-----------------------------------------------| + * | free space for | + * | (data_capacity-data_count) bytes | + * |-----------------------------------------------| + * + * With the total length of the whole packet being camera_metadata.size bytes. + * + * In short, the entries and data are contiguous in memory after the metadata + * header. + */ +#define METADATA_ALIGNMENT ((size_t) 4) +struct camera_metadata { + metadata_size_t size; + uint32_t version; + uint32_t flags; + metadata_size_t entry_count; + metadata_size_t entry_capacity; + metadata_uptrdiff_t entries_start; // Offset from camera_metadata + metadata_size_t data_count; + metadata_size_t data_capacity; + metadata_uptrdiff_t data_start; // Offset from camera_metadata + uint32_t padding; // padding to 8 bytes boundary + metadata_vendor_id_t vendor_id; +}; + +/** + * A datum of metadata. This corresponds to camera_metadata_entry_t::data + * with the difference that each element is not a pointer. We need to have a + * non-pointer type description in order to figure out the largest alignment + * requirement for data (DATA_ALIGNMENT). + */ +#define DATA_ALIGNMENT ((size_t) 8) +typedef union camera_metadata_data { + uint8_t u8; + int32_t i32; + float f; + int64_t i64; + double d; + camera_metadata_rational_t r; +} camera_metadata_data_t; + +_Static_assert(sizeof(metadata_size_t) == 4, + "Size of metadata_size_t must be 4"); +_Static_assert(sizeof(metadata_uptrdiff_t) == 4, + "Size of metadata_uptrdiff_t must be 4"); +_Static_assert(sizeof(metadata_vendor_id_t) == 8, + "Size of metadata_vendor_id_t must be 8"); +_Static_assert(sizeof(camera_metadata_data_t) == 8, + "Size of camera_metadata_data_t must be 8"); + +_Static_assert(offsetof(camera_metadata_buffer_entry_t, tag) == 0, + "Offset of tag must be 0"); +_Static_assert(offsetof(camera_metadata_buffer_entry_t, count) == 4, + "Offset of count must be 4"); +_Static_assert(offsetof(camera_metadata_buffer_entry_t, data) == 8, + "Offset of data must be 8"); +_Static_assert(offsetof(camera_metadata_buffer_entry_t, type) == 12, + "Offset of type must be 12"); +_Static_assert(sizeof(camera_metadata_buffer_entry_t) == 16, + "Size of camera_metadata_buffer_entry_t must be 16"); + +_Static_assert(offsetof(camera_metadata_t, size) == 0, + "Offset of size must be 0"); +_Static_assert(offsetof(camera_metadata_t, version) == 4, + "Offset of version must be 4"); +_Static_assert(offsetof(camera_metadata_t, flags) == 8, + "Offset of flags must be 8"); +_Static_assert(offsetof(camera_metadata_t, entry_count) == 12, + "Offset of entry_count must be 12"); +_Static_assert(offsetof(camera_metadata_t, entry_capacity) == 16, + "Offset of entry_capacity must be 16"); +_Static_assert(offsetof(camera_metadata_t, entries_start) == 20, + "Offset of entries_start must be 20"); +_Static_assert(offsetof(camera_metadata_t, data_count) == 24, + "Offset of data_count must be 24"); +_Static_assert(offsetof(camera_metadata_t, data_capacity) == 28, + "Offset of data_capacity must be 28"); +_Static_assert(offsetof(camera_metadata_t, data_start) == 32, + "Offset of data_start must be 32"); +_Static_assert(offsetof(camera_metadata_t, vendor_id) == 40, + "Offset of vendor_id must be 40"); +_Static_assert(sizeof(camera_metadata_t) == 48, + "Size of camera_metadata_t must be 48"); + +/** + * The preferred alignment of a packet of camera metadata. In general, + * this is the lowest common multiple of the constituents of a metadata + * package, i.e, of DATA_ALIGNMENT and ENTRY_ALIGNMENT. + */ +#define MAX_ALIGNMENT(A, B) (((A) > (B)) ? (A) : (B)) +#define METADATA_PACKET_ALIGNMENT \ + MAX_ALIGNMENT(MAX_ALIGNMENT(DATA_ALIGNMENT, METADATA_ALIGNMENT), ENTRY_ALIGNMENT) + +/** Versioning information */ +#define CURRENT_METADATA_VERSION 1 + +/** Flag definitions */ +#define FLAG_SORTED 0x00000001 + +/** Tag information */ + +typedef struct tag_info { + const char *tag_name; + uint8_t tag_type; +} tag_info_t; + +#include "camera_metadata_tag_info.c" + +const size_t camera_metadata_type_size[NUM_TYPES] = { + [TYPE_BYTE] = sizeof(uint8_t), + [TYPE_INT32] = sizeof(int32_t), + [TYPE_FLOAT] = sizeof(float), + [TYPE_INT64] = sizeof(int64_t), + [TYPE_DOUBLE] = sizeof(double), + [TYPE_RATIONAL] = sizeof(camera_metadata_rational_t) +}; + +const char *camera_metadata_type_names[NUM_TYPES] = { + [TYPE_BYTE] = "byte", + [TYPE_INT32] = "int32", + [TYPE_FLOAT] = "float", + [TYPE_INT64] = "int64", + [TYPE_DOUBLE] = "double", + [TYPE_RATIONAL] = "rational" +}; + +static camera_metadata_buffer_entry_t *get_entries( + const camera_metadata_t *metadata) { + return (camera_metadata_buffer_entry_t*) + ((uint8_t*)metadata + metadata->entries_start); +} + +static uint8_t *get_data(const camera_metadata_t *metadata) { + return (uint8_t*)metadata + metadata->data_start; +} + +size_t get_camera_metadata_alignment() { + return METADATA_PACKET_ALIGNMENT; +} + +camera_metadata_t *allocate_copy_camera_metadata_checked( + const camera_metadata_t *src, + size_t src_size) { + + if (src == NULL) { + return NULL; + } + + if (src_size < sizeof(camera_metadata_t)) { + ALOGE("%s: Source size too small!", __FUNCTION__); + // android_errorWriteLog(0x534e4554, "67782345"); + return NULL; + } + + void *buffer = malloc(src_size); + memcpy(buffer, src, src_size); + + camera_metadata_t *metadata = (camera_metadata_t*) buffer; + if (validate_camera_metadata_structure(metadata, &src_size) != OK) { + free(buffer); + return NULL; + } + + return metadata; +} + +camera_metadata_t *allocate_camera_metadata(size_t entry_capacity, + size_t data_capacity) { + + size_t memory_needed = calculate_camera_metadata_size(entry_capacity, + data_capacity); + void *buffer = malloc(memory_needed); + camera_metadata_t *metadata = place_camera_metadata( + buffer, memory_needed, entry_capacity, data_capacity); + if (!metadata) { + /* This should not happen when memory_needed is the same + * calculated in this function and in place_camera_metadata. + */ + free(buffer); + } + return metadata; +} + +camera_metadata_t *place_camera_metadata(void *dst, + size_t dst_size, + size_t entry_capacity, + size_t data_capacity) { + if (dst == NULL) return NULL; + + size_t memory_needed = calculate_camera_metadata_size(entry_capacity, + data_capacity); + if (memory_needed > dst_size) return NULL; + + camera_metadata_t *metadata = (camera_metadata_t*)dst; + metadata->version = CURRENT_METADATA_VERSION; + metadata->flags = 0; + metadata->entry_count = 0; + metadata->entry_capacity = entry_capacity; + metadata->entries_start = + ALIGN_TO(sizeof(camera_metadata_t), ENTRY_ALIGNMENT); + metadata->data_count = 0; + metadata->data_capacity = data_capacity; + metadata->size = memory_needed; + size_t data_unaligned = (uint8_t*)(get_entries(metadata) + + metadata->entry_capacity) - (uint8_t*)metadata; + metadata->data_start = ALIGN_TO(data_unaligned, DATA_ALIGNMENT); + metadata->vendor_id = CAMERA_METADATA_INVALID_VENDOR_ID; + + assert(validate_camera_metadata_structure(metadata, NULL) == OK); + return metadata; +} +void free_camera_metadata(camera_metadata_t *metadata) { + free(metadata); +} + +size_t calculate_camera_metadata_size(size_t entry_count, + size_t data_count) { + size_t memory_needed = sizeof(camera_metadata_t); + // Start entry list at aligned boundary + memory_needed = ALIGN_TO(memory_needed, ENTRY_ALIGNMENT); + memory_needed += sizeof(camera_metadata_buffer_entry_t[entry_count]); + // Start buffer list at aligned boundary + memory_needed = ALIGN_TO(memory_needed, DATA_ALIGNMENT); + memory_needed += sizeof(uint8_t[data_count]); + // Make sure camera metadata can be stacked in continuous memory + memory_needed = ALIGN_TO(memory_needed, METADATA_PACKET_ALIGNMENT); + return memory_needed; +} + +size_t get_camera_metadata_size(const camera_metadata_t *metadata) { + if (metadata == NULL) return ERROR; + + return metadata->size; +} + +size_t get_camera_metadata_compact_size(const camera_metadata_t *metadata) { + if (metadata == NULL) return ERROR; + + return calculate_camera_metadata_size(metadata->entry_count, + metadata->data_count); +} + +size_t get_camera_metadata_entry_count(const camera_metadata_t *metadata) { + return metadata->entry_count; +} + +size_t get_camera_metadata_entry_capacity(const camera_metadata_t *metadata) { + return metadata->entry_capacity; +} + +size_t get_camera_metadata_data_count(const camera_metadata_t *metadata) { + return metadata->data_count; +} + +size_t get_camera_metadata_data_capacity(const camera_metadata_t *metadata) { + return metadata->data_capacity; +} + +camera_metadata_t* copy_camera_metadata(void *dst, size_t dst_size, + const camera_metadata_t *src) { + size_t memory_needed = get_camera_metadata_compact_size(src); + + if (dst == NULL) return NULL; + if (dst_size < memory_needed) return NULL; + + camera_metadata_t *metadata = + place_camera_metadata(dst, dst_size, src->entry_count, src->data_count); + + metadata->flags = src->flags; + metadata->entry_count = src->entry_count; + metadata->data_count = src->data_count; + metadata->vendor_id = src->vendor_id; + + memcpy(get_entries(metadata), get_entries(src), + sizeof(camera_metadata_buffer_entry_t[metadata->entry_count])); + memcpy(get_data(metadata), get_data(src), + sizeof(uint8_t[metadata->data_count])); + + assert(validate_camera_metadata_structure(metadata, NULL) == OK); + return metadata; +} + +// This method should be used when the camera metadata cannot be trusted. For example, when it's +// read from Parcel. +static int validate_and_calculate_camera_metadata_entry_data_size(size_t *data_size, uint8_t type, + size_t data_count) { + if (type >= NUM_TYPES) return ERROR; + + // Check for overflow + if (data_count != 0 && + camera_metadata_type_size[type] > (SIZE_MAX - DATA_ALIGNMENT + 1) / data_count) { + // android_errorWriteLog(SN_EVENT_LOG_ID, "30741779"); + return ERROR; + } + + size_t data_bytes = data_count * camera_metadata_type_size[type]; + + if (data_size) { + *data_size = data_bytes <= 4 ? 0 : ALIGN_TO(data_bytes, DATA_ALIGNMENT); + } + + return OK; +} + +size_t calculate_camera_metadata_entry_data_size(uint8_t type, + size_t data_count) { + if (type >= NUM_TYPES) return 0; + + size_t data_bytes = data_count * + camera_metadata_type_size[type]; + + return data_bytes <= 4 ? 0 : ALIGN_TO(data_bytes, DATA_ALIGNMENT); +} + +int validate_camera_metadata_structure(const camera_metadata_t *metadata, + const size_t *expected_size) { + + if (metadata == NULL) { + ALOGE("%s: metadata is null!", __FUNCTION__); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + uintptr_t aligned_ptr = ALIGN_TO(metadata, METADATA_PACKET_ALIGNMENT); + const uintptr_t alignmentOffset = aligned_ptr - (uintptr_t) metadata; + + // Check that the metadata pointer is well-aligned first. + { + static const struct { + const char *name; + size_t alignment; + } alignments[] = { + { + .name = "camera_metadata", + .alignment = METADATA_ALIGNMENT + }, + { + .name = "camera_metadata_buffer_entry", + .alignment = ENTRY_ALIGNMENT + }, + { + .name = "camera_metadata_data", + .alignment = DATA_ALIGNMENT + }, + }; + + for (size_t i = 0; i < sizeof(alignments)/sizeof(alignments[0]); ++i) { + uintptr_t aligned_ptr = ALIGN_TO((uintptr_t) metadata + alignmentOffset, + alignments[i].alignment); + + if ((uintptr_t)metadata + alignmentOffset != aligned_ptr) { + ALOGE("%s: Metadata pointer is not aligned (actual %p, " + "expected %p, offset %" PRIuPTR ") to type %s", + __FUNCTION__, metadata, + (void*)aligned_ptr, alignmentOffset, alignments[i].name); + return CAMERA_METADATA_VALIDATION_ERROR; + } + } + } + + /** + * Check that the metadata contents are correct + */ + + if (expected_size != NULL && metadata->size > *expected_size) { + ALOGE("%s: Metadata size (%" PRIu32 ") should be <= expected size (%zu)", + __FUNCTION__, metadata->size, *expected_size); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + if (metadata->entry_count > metadata->entry_capacity) { + ALOGE("%s: Entry count (%" PRIu32 ") should be <= entry capacity " + "(%" PRIu32 ")", + __FUNCTION__, metadata->entry_count, metadata->entry_capacity); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + if (metadata->data_count > metadata->data_capacity) { + ALOGE("%s: Data count (%" PRIu32 ") should be <= data capacity " + "(%" PRIu32 ")", + __FUNCTION__, metadata->data_count, metadata->data_capacity); + // android_errorWriteLog(SN_EVENT_LOG_ID, "30591838"); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + const metadata_uptrdiff_t entries_end = + metadata->entries_start + metadata->entry_capacity; + if (entries_end < metadata->entries_start || // overflow check + entries_end > metadata->data_start) { + + ALOGE("%s: Entry start + capacity (%" PRIu32 ") should be <= data start " + "(%" PRIu32 ")", + __FUNCTION__, + (metadata->entries_start + metadata->entry_capacity), + metadata->data_start); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + const metadata_uptrdiff_t data_end = + metadata->data_start + metadata->data_capacity; + if (data_end < metadata->data_start || // overflow check + data_end > metadata->size) { + + ALOGE("%s: Data start + capacity (%" PRIu32 ") should be <= total size " + "(%" PRIu32 ")", + __FUNCTION__, + (metadata->data_start + metadata->data_capacity), + metadata->size); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + // Validate each entry + const metadata_size_t entry_count = metadata->entry_count; + camera_metadata_buffer_entry_t *entries = get_entries(metadata); + + for (size_t i = 0; i < entry_count; ++i) { + + if ((uintptr_t)&entries[i] + alignmentOffset != + ALIGN_TO((uintptr_t)&entries[i] + alignmentOffset, ENTRY_ALIGNMENT)) { + ALOGE("%s: Entry index %zu had bad alignment (address %p)," + " expected alignment %zu", + __FUNCTION__, i, &entries[i], ENTRY_ALIGNMENT); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + camera_metadata_buffer_entry_t entry = entries[i]; + + if (entry.type >= NUM_TYPES) { + ALOGE("%s: Entry index %zu had a bad type %d", + __FUNCTION__, i, entry.type); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + // TODO: fix vendor_tag_ops across processes so we don't need to special + // case vendor-specific tags + uint32_t tag_section = entry.tag >> 16; + int tag_type = get_local_camera_metadata_tag_type(entry.tag, metadata); + if (tag_type != (int)entry.type && tag_section < VENDOR_SECTION) { + ALOGE("%s: Entry index %zu had tag type %d, but the type was %d", + __FUNCTION__, i, tag_type, entry.type); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + size_t data_size; + if (validate_and_calculate_camera_metadata_entry_data_size(&data_size, entry.type, + entry.count) != OK) { + ALOGE("%s: Entry data size is invalid. type: %u count: %u", __FUNCTION__, entry.type, + entry.count); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + if (data_size != 0) { + camera_metadata_data_t *data = + (camera_metadata_data_t*) (get_data(metadata) + + entry.data.offset); + + if ((uintptr_t)data + alignmentOffset != + ALIGN_TO((uintptr_t)data + alignmentOffset, DATA_ALIGNMENT)) { + ALOGE("%s: Entry index %zu had bad data alignment (address %p)," + " expected align %zu, (tag name %s, data size %zu)", + __FUNCTION__, i, data, DATA_ALIGNMENT, + get_local_camera_metadata_tag_name(entry.tag, metadata) ? + : "unknown", data_size); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + size_t data_entry_end = entry.data.offset + data_size; + if (data_entry_end < entry.data.offset || // overflow check + data_entry_end > metadata->data_capacity) { + + ALOGE("%s: Entry index %zu data ends (%zu) beyond the capacity " + "%" PRIu32, __FUNCTION__, i, data_entry_end, + metadata->data_capacity); + return CAMERA_METADATA_VALIDATION_ERROR; + } + + } else if (entry.count == 0) { + if (entry.data.offset != 0) { + ALOGE("%s: Entry index %zu had 0 items, but offset was non-0 " + "(%" PRIu32 "), tag name: %s", __FUNCTION__, i, entry.data.offset, + get_local_camera_metadata_tag_name(entry.tag, metadata) ? : "unknown"); + return CAMERA_METADATA_VALIDATION_ERROR; + } + } // else data stored inline, so we look at value which can be anything. + } + + if (alignmentOffset == 0) { + return OK; + } + return CAMERA_METADATA_VALIDATION_SHIFTED; +} + +int append_camera_metadata(camera_metadata_t *dst, + const camera_metadata_t *src) { + if (dst == NULL || src == NULL ) return ERROR; + + // Check for overflow + if (src->entry_count + dst->entry_count < src->entry_count) return ERROR; + if (src->data_count + dst->data_count < src->data_count) return ERROR; + // Check for space + if (dst->entry_capacity < src->entry_count + dst->entry_count) return ERROR; + if (dst->data_capacity < src->data_count + dst->data_count) return ERROR; + + if ((dst->vendor_id != CAMERA_METADATA_INVALID_VENDOR_ID) && + (src->vendor_id != CAMERA_METADATA_INVALID_VENDOR_ID)) { + if (dst->vendor_id != src->vendor_id) { + ALOGE("%s: Append for metadata from different vendors is" + "not supported!", __func__); + return ERROR; + } + } + + memcpy(get_entries(dst) + dst->entry_count, get_entries(src), + sizeof(camera_metadata_buffer_entry_t[src->entry_count])); + memcpy(get_data(dst) + dst->data_count, get_data(src), + sizeof(uint8_t[src->data_count])); + if (dst->data_count != 0) { + camera_metadata_buffer_entry_t *entry = get_entries(dst) + dst->entry_count; + for (size_t i = 0; i < src->entry_count; i++, entry++) { + if ( calculate_camera_metadata_entry_data_size(entry->type, + entry->count) > 0 ) { + entry->data.offset += dst->data_count; + } + } + } + if (dst->entry_count == 0) { + // Appending onto empty buffer, keep sorted state + dst->flags |= src->flags & FLAG_SORTED; + } else if (src->entry_count != 0) { + // Both src, dst are nonempty, cannot assume sort remains + dst->flags &= ~FLAG_SORTED; + } else { + // Src is empty, keep dst sorted state + } + dst->entry_count += src->entry_count; + dst->data_count += src->data_count; + + if (dst->vendor_id == CAMERA_METADATA_INVALID_VENDOR_ID) { + dst->vendor_id = src->vendor_id; + } + + assert(validate_camera_metadata_structure(dst, NULL) == OK); + return OK; +} + +camera_metadata_t *clone_camera_metadata(const camera_metadata_t *src) { + int res; + if (src == NULL) return NULL; + camera_metadata_t *clone = allocate_camera_metadata( + get_camera_metadata_entry_count(src), + get_camera_metadata_data_count(src)); + if (clone != NULL) { + res = append_camera_metadata(clone, src); + if (res != OK) { + free_camera_metadata(clone); + clone = NULL; + } + } + assert(validate_camera_metadata_structure(clone, NULL) == OK); + return clone; +} + +static int add_camera_metadata_entry_raw(camera_metadata_t *dst, + uint32_t tag, + uint8_t type, + const void *data, + size_t data_count) { + + if (dst == NULL) return ERROR; + if (dst->entry_count == dst->entry_capacity) return ERROR; + if (data_count && data == NULL) return ERROR; + + size_t data_bytes = + calculate_camera_metadata_entry_data_size(type, data_count); + if (data_bytes + dst->data_count > dst->data_capacity) return ERROR; + + size_t data_payload_bytes = + data_count * camera_metadata_type_size[type]; + camera_metadata_buffer_entry_t *entry = get_entries(dst) + dst->entry_count; + memset(entry, 0, sizeof(camera_metadata_buffer_entry_t)); + entry->tag = tag; + entry->type = type; + entry->count = data_count; + + if (data_bytes == 0) { + memcpy(entry->data.value, data, + data_payload_bytes); + } else { + entry->data.offset = dst->data_count; + memcpy(get_data(dst) + entry->data.offset, data, + data_payload_bytes); + dst->data_count += data_bytes; + } + dst->entry_count++; + dst->flags &= ~FLAG_SORTED; + assert(validate_camera_metadata_structure(dst, NULL) == OK); + return OK; +} + +int add_camera_metadata_entry(camera_metadata_t *dst, + uint32_t tag, + const void *data, + size_t data_count) { + + int type = get_local_camera_metadata_tag_type(tag, dst); + if (type == -1) { + ALOGE("%s: Unknown tag %04x.", __FUNCTION__, tag); + return ERROR; + } + + return add_camera_metadata_entry_raw(dst, + tag, + type, + data, + data_count); +} + +static int compare_entry_tags(const void *p1, const void *p2) { + uint32_t tag1 = ((camera_metadata_buffer_entry_t*)p1)->tag; + uint32_t tag2 = ((camera_metadata_buffer_entry_t*)p2)->tag; + return tag1 < tag2 ? -1 : + tag1 == tag2 ? 0 : + 1; +} + +int sort_camera_metadata(camera_metadata_t *dst) { + if (dst == NULL) return ERROR; + if (dst->flags & FLAG_SORTED) return OK; + + qsort(get_entries(dst), dst->entry_count, + sizeof(camera_metadata_buffer_entry_t), + compare_entry_tags); + dst->flags |= FLAG_SORTED; + + assert(validate_camera_metadata_structure(dst, NULL) == OK); + return OK; +} + +int get_camera_metadata_entry(camera_metadata_t *src, + size_t index, + camera_metadata_entry_t *entry) { + if (src == NULL || entry == NULL) return ERROR; + if (index >= src->entry_count) return ERROR; + + camera_metadata_buffer_entry_t *buffer_entry = get_entries(src) + index; + + entry->index = index; + entry->tag = buffer_entry->tag; + entry->type = buffer_entry->type; + entry->count = buffer_entry->count; + if (buffer_entry->count * + camera_metadata_type_size[buffer_entry->type] > 4) { + entry->data.u8 = get_data(src) + buffer_entry->data.offset; + } else { + entry->data.u8 = buffer_entry->data.value; + } + return OK; +} + +int get_camera_metadata_ro_entry(const camera_metadata_t *src, + size_t index, + camera_metadata_ro_entry_t *entry) { + return get_camera_metadata_entry((camera_metadata_t*)src, index, + (camera_metadata_entry_t*)entry); +} + +int find_camera_metadata_entry(camera_metadata_t *src, + uint32_t tag, + camera_metadata_entry_t *entry) { + if (src == NULL) return ERROR; + + uint32_t index; + if (src->flags & FLAG_SORTED) { + // Sorted entries, do a binary search + camera_metadata_buffer_entry_t *search_entry = NULL; + camera_metadata_buffer_entry_t key; + key.tag = tag; + search_entry = bsearch(&key, + get_entries(src), + src->entry_count, + sizeof(camera_metadata_buffer_entry_t), + compare_entry_tags); + if (search_entry == NULL) return NOT_FOUND; + index = search_entry - get_entries(src); + } else { + // Not sorted, linear search + camera_metadata_buffer_entry_t *search_entry = get_entries(src); + for (index = 0; index < src->entry_count; index++, search_entry++) { + if (search_entry->tag == tag) { + break; + } + } + if (index == src->entry_count) return NOT_FOUND; + } + + return get_camera_metadata_entry(src, index, + entry); +} + +int find_camera_metadata_ro_entry(const camera_metadata_t *src, + uint32_t tag, + camera_metadata_ro_entry_t *entry) { + return find_camera_metadata_entry((camera_metadata_t*)src, tag, + (camera_metadata_entry_t*)entry); +} + + +int delete_camera_metadata_entry(camera_metadata_t *dst, + size_t index) { + if (dst == NULL) return ERROR; + if (index >= dst->entry_count) return ERROR; + + camera_metadata_buffer_entry_t *entry = get_entries(dst) + index; + size_t data_bytes = calculate_camera_metadata_entry_data_size(entry->type, + entry->count); + + if (data_bytes > 0) { + // Shift data buffer to overwrite deleted data + uint8_t *start = get_data(dst) + entry->data.offset; + uint8_t *end = start + data_bytes; + size_t length = dst->data_count - entry->data.offset - data_bytes; + memmove(start, end, length); + + // Update all entry indices to account for shift + camera_metadata_buffer_entry_t *e = get_entries(dst); + size_t i; + for (i = 0; i < dst->entry_count; i++) { + if (calculate_camera_metadata_entry_data_size( + e->type, e->count) > 0 && + e->data.offset > entry->data.offset) { + e->data.offset -= data_bytes; + } + ++e; + } + dst->data_count -= data_bytes; + } + // Shift entry array + memmove(entry, entry + 1, + sizeof(camera_metadata_buffer_entry_t) * + (dst->entry_count - index - 1) ); + dst->entry_count -= 1; + + assert(validate_camera_metadata_structure(dst, NULL) == OK); + return OK; +} + +int update_camera_metadata_entry(camera_metadata_t *dst, + size_t index, + const void *data, + size_t data_count, + camera_metadata_entry_t *updated_entry) { + if (dst == NULL) return ERROR; + if (index >= dst->entry_count) return ERROR; + + camera_metadata_buffer_entry_t *entry = get_entries(dst) + index; + + size_t data_bytes = + calculate_camera_metadata_entry_data_size(entry->type, + data_count); + size_t data_payload_bytes = + data_count * camera_metadata_type_size[entry->type]; + + size_t entry_bytes = + calculate_camera_metadata_entry_data_size(entry->type, + entry->count); + if (data_bytes != entry_bytes) { + // May need to shift/add to data array + if (dst->data_capacity < dst->data_count + data_bytes - entry_bytes) { + // No room + return ERROR; + } + if (entry_bytes != 0) { + // Remove old data + uint8_t *start = get_data(dst) + entry->data.offset; + uint8_t *end = start + entry_bytes; + size_t length = dst->data_count - entry->data.offset - entry_bytes; + memmove(start, end, length); + dst->data_count -= entry_bytes; + + // Update all entry indices to account for shift + camera_metadata_buffer_entry_t *e = get_entries(dst); + size_t i; + for (i = 0; i < dst->entry_count; i++) { + if (calculate_camera_metadata_entry_data_size( + e->type, e->count) > 0 && + e->data.offset > entry->data.offset) { + e->data.offset -= entry_bytes; + } + ++e; + } + } + + if (data_bytes != 0) { + // Append new data + entry->data.offset = dst->data_count; + + memcpy(get_data(dst) + entry->data.offset, data, data_payload_bytes); + dst->data_count += data_bytes; + } + } else if (data_bytes != 0) { + // data size unchanged, reuse same data location + memcpy(get_data(dst) + entry->data.offset, data, data_payload_bytes); + } + + if (data_bytes == 0) { + // Data fits into entry + memcpy(entry->data.value, data, + data_payload_bytes); + } + + entry->count = data_count; + + if (updated_entry != NULL) { + get_camera_metadata_entry(dst, + index, + updated_entry); + } + + assert(validate_camera_metadata_structure(dst, NULL) == OK); + return OK; +} + +static const vendor_tag_ops_t *vendor_tag_ops = NULL; +static const struct vendor_tag_cache_ops *vendor_cache_ops = NULL; + +// Declared in system/media/private/camera/include/camera_metadata_hidden.h +const char *get_local_camera_metadata_section_name_vendor_id(uint32_t tag, + metadata_vendor_id_t id) { + uint32_t tag_section = tag >> 16; + if (tag_section >= VENDOR_SECTION && vendor_cache_ops != NULL && + id != CAMERA_METADATA_INVALID_VENDOR_ID) { + return vendor_cache_ops->get_section_name(tag, id); + } else if (tag_section >= VENDOR_SECTION && vendor_tag_ops != NULL) { + return vendor_tag_ops->get_section_name( + vendor_tag_ops, + tag); + } + if (tag_section >= ANDROID_SECTION_COUNT) { + return NULL; + } + return camera_metadata_section_names[tag_section]; +} + +// Declared in system/media/private/camera/include/camera_metadata_hidden.h +const char *get_local_camera_metadata_tag_name_vendor_id(uint32_t tag, + metadata_vendor_id_t id) { + uint32_t tag_section = tag >> 16; + if (tag_section >= VENDOR_SECTION && vendor_cache_ops != NULL && + id != CAMERA_METADATA_INVALID_VENDOR_ID) { + return vendor_cache_ops->get_tag_name(tag, id); + } else if (tag_section >= VENDOR_SECTION && vendor_tag_ops != NULL) { + return vendor_tag_ops->get_tag_name( + vendor_tag_ops, + tag); + } + if (tag_section >= ANDROID_SECTION_COUNT || + tag >= camera_metadata_section_bounds[tag_section][1] ) { + return NULL; + } + uint32_t tag_index = tag & 0xFFFF; + return tag_info[tag_section][tag_index].tag_name; +} + +// Declared in system/media/private/camera/include/camera_metadata_hidden.h +int get_local_camera_metadata_tag_type_vendor_id(uint32_t tag, + metadata_vendor_id_t id) { + uint32_t tag_section = tag >> 16; + if (tag_section >= VENDOR_SECTION && vendor_cache_ops != NULL && + id != CAMERA_METADATA_INVALID_VENDOR_ID) { + return vendor_cache_ops->get_tag_type(tag, id); + } else if (tag_section >= VENDOR_SECTION && vendor_tag_ops != NULL) { + return vendor_tag_ops->get_tag_type( + vendor_tag_ops, + tag); + } + if (tag_section >= ANDROID_SECTION_COUNT || + tag >= camera_metadata_section_bounds[tag_section][1] ) { + return -1; + } + uint32_t tag_index = tag & 0xFFFF; + return tag_info[tag_section][tag_index].tag_type; +} + +const char *get_camera_metadata_section_name(uint32_t tag) { + return get_local_camera_metadata_section_name(tag, NULL); +} + +const char *get_camera_metadata_tag_name(uint32_t tag) { + return get_local_camera_metadata_tag_name(tag, NULL); +} + +int get_camera_metadata_tag_type(uint32_t tag) { + return get_local_camera_metadata_tag_type(tag, NULL); +} + +const char *get_local_camera_metadata_section_name(uint32_t tag, + const camera_metadata_t *meta) { + metadata_vendor_id_t id = (NULL == meta) ? CAMERA_METADATA_INVALID_VENDOR_ID : + meta->vendor_id; + + return get_local_camera_metadata_section_name_vendor_id(tag, id); +} + +const char *get_local_camera_metadata_tag_name(uint32_t tag, + const camera_metadata_t *meta) { + metadata_vendor_id_t id = (NULL == meta) ? CAMERA_METADATA_INVALID_VENDOR_ID : + meta->vendor_id; + + return get_local_camera_metadata_tag_name_vendor_id(tag, id); +} + +int get_local_camera_metadata_tag_type(uint32_t tag, + const camera_metadata_t *meta) { + metadata_vendor_id_t id = (NULL == meta) ? CAMERA_METADATA_INVALID_VENDOR_ID : + meta->vendor_id; + + return get_local_camera_metadata_tag_type_vendor_id(tag, id); +} + +int set_camera_metadata_vendor_tag_ops(const vendor_tag_query_ops_t* ops) { + // **DEPRECATED** + (void) ops; + ALOGE("%s: This function has been deprecated", __FUNCTION__); + return ERROR; +} + +// Declared in system/media/private/camera/include/camera_metadata_hidden.h +int set_camera_metadata_vendor_ops(const vendor_tag_ops_t* ops) { + vendor_tag_ops = ops; + return OK; +} + +// Declared in system/media/private/camera/include/camera_metadata_hidden.h +int set_camera_metadata_vendor_cache_ops( + const struct vendor_tag_cache_ops *query_cache_ops) { + vendor_cache_ops = query_cache_ops; + return OK; +} + +// Declared in system/media/private/camera/include/camera_metadata_hidden.h +void set_camera_metadata_vendor_id(camera_metadata_t *meta, + metadata_vendor_id_t id) { + if (NULL != meta) { + meta->vendor_id = id; + } +} + +// Declared in system/media/private/camera/include/camera_metadata_hidden.h +metadata_vendor_id_t get_camera_metadata_vendor_id( + const camera_metadata_t *meta) { + metadata_vendor_id_t ret = CAMERA_METADATA_INVALID_VENDOR_ID; + + if (NULL != meta) { + ret = meta->vendor_id; + } + + return ret; +} + +static void print_data(int fd, const uint8_t *data_ptr, uint32_t tag, int type, + int count, + int indentation); + +void dump_camera_metadata(const camera_metadata_t *metadata, + int fd, + int verbosity) { + dump_indented_camera_metadata(metadata, fd, verbosity, 0); +} + +void dump_indented_camera_metadata(const camera_metadata_t *metadata, + int fd, + int verbosity, + int indentation) { + if (metadata == NULL) { + dprintf(fd, "%*sDumping camera metadata array: Not allocated\n", + indentation, ""); + return; + } + unsigned int i; + dprintf(fd, + "%*sDumping camera metadata array: %" PRIu32 " / %" PRIu32 " entries, " + "%" PRIu32 " / %" PRIu32 " bytes of extra data.\n", indentation, "", + metadata->entry_count, metadata->entry_capacity, + metadata->data_count, metadata->data_capacity); + dprintf(fd, "%*sVersion: %d, Flags: %08x\n", + indentation + 2, "", + metadata->version, metadata->flags); + camera_metadata_buffer_entry_t *entry = get_entries(metadata); + for (i=0; i < metadata->entry_count; i++, entry++) { + + const char *tag_name, *tag_section; + tag_section = get_local_camera_metadata_section_name(entry->tag, metadata); + if (tag_section == NULL) { + tag_section = "unknownSection"; + } + tag_name = get_local_camera_metadata_tag_name(entry->tag, metadata); + if (tag_name == NULL) { + tag_name = "unknownTag"; + } + const char *type_name; + if (entry->type >= NUM_TYPES) { + type_name = "unknown"; + } else { + type_name = camera_metadata_type_names[entry->type]; + } + dprintf(fd, "%*s%s.%s (%05x): %s[%" PRIu32 "]\n", + indentation + 2, "", + tag_section, + tag_name, + entry->tag, + type_name, + entry->count); + + if (verbosity < 1) continue; + + if (entry->type >= NUM_TYPES) continue; + + size_t type_size = camera_metadata_type_size[entry->type]; + uint8_t *data_ptr; + if ( type_size * entry->count > 4 ) { + if (entry->data.offset >= metadata->data_count) { + ALOGE("%s: Malformed entry data offset: %" PRIu32 " (max %" PRIu32 ")", + __FUNCTION__, + entry->data.offset, + metadata->data_count); + continue; + } + data_ptr = get_data(metadata) + entry->data.offset; + } else { + data_ptr = entry->data.value; + } + int count = entry->count; + if (verbosity < 2 && count > 16) count = 16; + + print_data(fd, data_ptr, entry->tag, entry->type, count, indentation); + } +} + +static void print_data(int fd, const uint8_t *data_ptr, uint32_t tag, + int type, int count, int indentation) { + static int values_per_line[NUM_TYPES] = { + [TYPE_BYTE] = 16, + [TYPE_INT32] = 4, + [TYPE_FLOAT] = 8, + [TYPE_INT64] = 2, + [TYPE_DOUBLE] = 4, + [TYPE_RATIONAL] = 2, + }; + size_t type_size = camera_metadata_type_size[type]; + char value_string_tmp[CAMERA_METADATA_ENUM_STRING_MAX_SIZE]; + uint32_t value; + + int lines = count / values_per_line[type]; + if (count % values_per_line[type] != 0) lines++; + + int index = 0; + int j, k; + for (j = 0; j < lines; j++) { + dprintf(fd, "%*s[", indentation + 4, ""); + for (k = 0; + k < values_per_line[type] && count > 0; + k++, count--, index += type_size) { + + switch (type) { + case TYPE_BYTE: + value = *(data_ptr + index); + if (camera_metadata_enum_snprint(tag, + value, + value_string_tmp, + sizeof(value_string_tmp)) + == OK) { + dprintf(fd, "%s ", value_string_tmp); + } else { + dprintf(fd, "%hhu ", + *(data_ptr + index)); + } + break; + case TYPE_INT32: + value = + *(int32_t*)(data_ptr + index); + if (camera_metadata_enum_snprint(tag, + value, + value_string_tmp, + sizeof(value_string_tmp)) + == OK) { + dprintf(fd, "%s ", value_string_tmp); + } else { + dprintf(fd, "%" PRId32 " ", + *(int32_t*)(data_ptr + index)); + } + break; + case TYPE_FLOAT: + dprintf(fd, "%0.8f ", + *(float*)(data_ptr + index)); + break; + case TYPE_INT64: + dprintf(fd, "%" PRId64 " ", + *(int64_t*)(data_ptr + index)); + break; + case TYPE_DOUBLE: + dprintf(fd, "%0.8f ", + *(double*)(data_ptr + index)); + break; + case TYPE_RATIONAL: { + int32_t numerator = *(int32_t*)(data_ptr + index); + int32_t denominator = *(int32_t*)(data_ptr + index + 4); + dprintf(fd, "(%d / %d) ", + numerator, denominator); + break; + } + default: + dprintf(fd, "??? "); + } + } + dprintf(fd, "]\n"); + } +} |