160 lines
6.1 KiB
SQL
160 lines
6.1 KiB
SQL
-- This file is part of Moonfire NVR, a security camera network video recorder.
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-- Copyright (C) 2016 The Moonfire NVR Authors
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- In addition, as a special exception, the copyright holders give
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-- permission to link the code of portions of this program with the
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-- OpenSSL library under certain conditions as described in each
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-- individual source file, and distribute linked combinations including
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-- the two.
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--
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-- You must obey the GNU General Public License in all respects for all
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-- of the code used other than OpenSSL. If you modify file(s) with this
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-- exception, you may extend this exception to your version of the
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-- file(s), but you are not obligated to do so. If you do not wish to do
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-- so, delete this exception statement from your version. If you delete
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-- this exception statement from all source files in the program, then
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-- also delete it here.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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--
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-- schema.sql: SQLite3 database schema for Moonfire NVR.
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-- See also design/schema.md.
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--pragma journal_mode = wal;
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-- This table tracks the schema version.
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-- There is one row for the initial database creation (inserted below, after the
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-- create statements) and one for each upgrade procedure (if any).
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create table version (
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id integer primary key,
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-- The unix time as of the creation/upgrade, as determined by
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-- cast(strftime('%s', 'now') as int).
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unix_time integer not null,
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-- Optional notes on the creation/upgrade; could include the binary version.
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notes text
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);
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create table camera (
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id integer primary key,
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uuid blob unique,-- not null check (length(uuid) = 16),
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-- A short name of the camera, used in log messages.
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short_name text,-- not null,
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-- A short description of the camera.
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description text,
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-- The host (or IP address) to use in rtsp:// URLs when accessing the camera.
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host text,
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-- The username to use when accessing the camera.
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-- If empty, no username or password will be supplied.
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username text,
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-- The password to use when accessing the camera.
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password text,
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-- The path (starting with "/") to use in rtsp:// URLs to reference this
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-- camera's "main" (full-quality) video stream.
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main_rtsp_path text,
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-- The path (starting with "/") to use in rtsp:// URLs to reference this
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-- camera's "sub" (low-bandwidth) video stream.
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sub_rtsp_path text,
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-- The number of bytes of video to retain, excluding the currently-recording
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-- file. Older files will be deleted as necessary to stay within this limit.
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retain_bytes integer not null check (retain_bytes >= 0)
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);
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-- Each row represents a single completed recorded segment of video.
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-- Recordings are typically ~60 seconds; never more than 5 minutes.
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create table recording (
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id integer primary key,
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camera_id integer references camera (id) not null,
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sample_file_bytes integer not null check (sample_file_bytes > 0),
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-- The starting time of the recording, in 90 kHz units since
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-- 1970-01-01 00:00:00 UTC. Currently on initial connection, this is taken
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-- from the local system time; on subsequent recordings, it exactly
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-- matches the previous recording's end time.
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start_time_90k integer not null check (start_time_90k > 0),
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-- The duration of the recording, in 90 kHz units.
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duration_90k integer not null
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check (duration_90k >= 0 and duration_90k < 5*60*90000),
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-- The number of 90 kHz units the local system time is ahead of the
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-- recording; negative numbers indicate the local system time is behind
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-- the recording. Large values would indicate that the local time has jumped
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-- during recording or that the local time and camera time frequencies do
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-- not match.
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local_time_delta_90k integer not null,
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video_samples integer not null check (video_samples > 0),
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video_sync_samples integer not null check (video_samples > 0),
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video_sample_entry_id integer references video_sample_entry (id),
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sample_file_uuid blob not null check (length(sample_file_uuid) = 16),
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sample_file_sha1 blob not null check (length(sample_file_sha1) = 20),
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video_index blob not null check (length(video_index) > 0)
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);
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create index recording_cover on recording (
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-- Typical queries use "where camera_id = ? order by start_time_90k (desc)?".
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camera_id,
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start_time_90k,
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-- These fields are not used for ordering; they cover most queries so
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-- that only database verification and actual viewing of recordings need
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-- to consult the underlying row.
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duration_90k,
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video_samples,
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video_sync_samples,
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video_sample_entry_id,
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sample_file_bytes
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);
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-- Files in the sample file directory which may be present but should simply be
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-- discarded on startup. (Recordings which were never completed or have been
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-- marked for completion.)
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create table reserved_sample_files (
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uuid blob primary key check (length(uuid) = 16),
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state integer not null -- 0 (writing) or 1 (deleted)
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) without rowid;
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-- A concrete box derived from a ISO/IEC 14496-12 section 8.5.2
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-- VisualSampleEntry box. Describes the codec, width, height, etc.
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create table video_sample_entry (
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id integer primary key,
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-- A SHA-1 hash of |bytes|.
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sha1 blob unique not null check (length(sha1) = 20),
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-- The width and height in pixels; must match values within
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-- |sample_entry_bytes|.
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width integer not null check (width > 0),
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height integer not null check (height > 0),
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-- The serialized box, including the leading length and box type (avcC in
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-- the case of H.264).
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data blob not null check (length(data) > 86)
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);
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insert into version (id, unix_time, notes)
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values (0, cast(strftime('%s', 'now') as int), 'db creation');
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