about summary refs log tree commit diff
path: root/app/models/media_attachment.rb
blob: f789bdc5531c5a8860c2a3a2a0103302999e365f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
# frozen_string_literal: true
# == Schema Information
#
# Table name: media_attachments
#
#  id                          :bigint(8)        not null, primary key
#  status_id                   :bigint(8)
#  file_file_name              :string
#  file_content_type           :string
#  file_file_size              :integer
#  file_updated_at             :datetime
#  remote_url                  :string           default(""), not null
#  created_at                  :datetime         not null
#  updated_at                  :datetime         not null
#  shortcode                   :string
#  type                        :integer          default("image"), not null
#  file_meta                   :json
#  account_id                  :bigint(8)
#  description                 :text
#  scheduled_status_id         :bigint(8)
#  blurhash                    :string
#  processing                  :integer
#  file_storage_schema_version :integer
#

class MediaAttachment < ApplicationRecord
  self.inheritance_column = nil

  enum type: [:image, :gifv, :video, :unknown, :audio]
  enum processing: [:queued, :in_progress, :complete, :failed], _prefix: true

  MAX_DESCRIPTION_LENGTH = 1_500

  IMAGE_FILE_EXTENSIONS = %w(.jpg .jpeg .png .gif).freeze
  VIDEO_FILE_EXTENSIONS = %w(.webm .mp4 .m4v .mov).freeze
  AUDIO_FILE_EXTENSIONS = %w(.ogg .oga .mp3 .wav .flac .opus .aac .m4a .3gp .wma).freeze

  IMAGE_MIME_TYPES             = %w(image/jpeg image/png image/gif).freeze
  VIDEO_MIME_TYPES             = %w(video/webm video/mp4 video/quicktime video/ogg).freeze
  VIDEO_CONVERTIBLE_MIME_TYPES = %w(video/webm video/quicktime).freeze
  AUDIO_MIME_TYPES             = %w(audio/wave audio/wav audio/x-wav audio/x-pn-wave audio/ogg audio/mpeg audio/mp3 audio/webm audio/flac audio/aac audio/m4a audio/x-m4a audio/mp4 audio/3gpp video/x-ms-asf).freeze

  BLURHASH_OPTIONS = {
    x_comp: 4,
    y_comp: 4,
  }.freeze

  IMAGE_STYLES = {
    original: {
      pixels: 1_638_400, # 1280x1280px
      file_geometry_parser: FastGeometryParser,
    },

    small: {
      pixels: 160_000, # 400x400px
      file_geometry_parser: FastGeometryParser,
      blurhash: BLURHASH_OPTIONS,
    },
  }.freeze

  VIDEO_FORMAT = {
    format: 'mp4',
    content_type: 'video/mp4',
    convert_options: {
      output: {
        'loglevel' => 'fatal',
        'movflags' => 'faststart',
        'pix_fmt' => 'yuv420p',
        'vf' => 'scale=\'trunc(iw/2)*2:trunc(ih/2)*2\'',
        'vsync' => 'cfr',
        'c:v' => 'h264',
        'maxrate' => '1300K',
        'bufsize' => '1300K',
        'frames:v' => 60 * 60 * 3,
        'crf' => 18,
        'map_metadata' => '-1',
      },
    },
  }.freeze

  VIDEO_PASSTHROUGH_OPTIONS = {
    video_codecs: ['h264'],
    audio_codecs: ['aac', nil],
    colorspaces: ['yuv420p'],
    options: {
      format: 'mp4',
      convert_options: {
        output: {
          'loglevel' => 'fatal',
          'map_metadata' => '-1',
          'c:v' => 'copy',
          'c:a' => 'copy',
        },
      },
    },
  }.freeze

  VIDEO_STYLES = {
    small: {
      convert_options: {
        output: {
          'loglevel' => 'fatal',
          vf: 'scale=\'min(400\, iw):min(400\, ih)\':force_original_aspect_ratio=decrease',
        },
      },
      format: 'png',
      time: 0,
      file_geometry_parser: FastGeometryParser,
      blurhash: BLURHASH_OPTIONS,
    },

    original: VIDEO_FORMAT.merge(passthrough_options: VIDEO_PASSTHROUGH_OPTIONS),
  }.freeze

  AUDIO_STYLES = {
    original: {
      format: 'mp3',
      content_type: 'audio/mpeg',
      convert_options: {
        output: {
          'loglevel' => 'fatal',
          'map_metadata' => '-1',
          'q:a' => 2,
        },
      },
    },
  }.freeze

  VIDEO_CONVERTED_STYLES = {
    small: VIDEO_STYLES[:small],
    original: VIDEO_FORMAT,
  }.freeze

  IMAGE_LIMIT = (ENV['MAX_IMAGE_SIZE'] || 10.megabytes).to_i
  VIDEO_LIMIT = (ENV['MAX_VIDEO_SIZE'] || 40.megabytes).to_i

  MAX_VIDEO_MATRIX_LIMIT = 2_304_000 # 1920x1200px
  MAX_VIDEO_FRAME_RATE   = 60

  belongs_to :account,          inverse_of: :media_attachments, optional: true
  belongs_to :status,           inverse_of: :media_attachments, optional: true
  belongs_to :scheduled_status, inverse_of: :media_attachments, optional: true

  has_attached_file :file,
                    styles: ->(f) { file_styles f },
                    processors: ->(f) { file_processors f },
                    convert_options: { all: '-quality 90 -strip +set modify-date +set create-date' }

  validates_attachment_content_type :file, content_type: IMAGE_MIME_TYPES + VIDEO_MIME_TYPES + AUDIO_MIME_TYPES
  validates_attachment_size :file, less_than: IMAGE_LIMIT, unless: :larger_media_format?
  validates_attachment_size :file, less_than: VIDEO_LIMIT, if: :larger_media_format?
  remotable_attachment :file, VIDEO_LIMIT, suppress_errors: false

  include Attachmentable

  validates :account, presence: true
  validates :description, length: { maximum: MAX_DESCRIPTION_LENGTH }, if: :local?
  validates :file, presence: true, if: :local?

  scope :attached,   -> { where.not(status_id: nil).or(where.not(scheduled_status_id: nil)) }
  scope :unattached, -> { where(status_id: nil, scheduled_status_id: nil) }
  scope :local,      -> { where(remote_url: '') }
  scope :remote,     -> { where.not(remote_url: '') }
  scope :cached,     -> { remote.where.not(file_file_name: nil) }

  default_scope { order(id: :asc) }

  def local?
    remote_url.blank?
  end

  def not_processed?
    processing.present? && !processing_complete?
  end

  def needs_redownload?
    file.blank? && remote_url.present?
  end

  def larger_media_format?
    video? || gifv? || audio?
  end

  def audio_or_video?
    audio? || video?
  end

  def to_param
    shortcode
  end

  def focus=(point)
    return if point.blank?

    x, y = (point.is_a?(Enumerable) ? point : point.split(',')).map(&:to_f)

    meta = file.instance_read(:meta) || {}
    meta['focus'] = { 'x' => x, 'y' => y }

    file.instance_write(:meta, meta)
  end

  def focus
    x = file.meta['focus']['x']
    y = file.meta['focus']['y']

    "#{x},#{y}"
  end

  attr_writer :delay_processing

  def delay_processing?
    @delay_processing
  end

  after_commit :enqueue_processing, on: :create
  after_commit :reset_parent_cache, on: :update

  before_create :prepare_description, unless: :local?
  before_create :set_shortcode
  before_create :set_processing

  before_post_process :set_type_and_extension
  before_post_process :check_video_dimensions

  before_save :set_meta

  class << self
    def supported_mime_types
      IMAGE_MIME_TYPES + VIDEO_MIME_TYPES + AUDIO_MIME_TYPES
    end

    def supported_file_extensions
      IMAGE_FILE_EXTENSIONS + VIDEO_FILE_EXTENSIONS + AUDIO_FILE_EXTENSIONS
    end

    private

    def file_styles(f)
      if f.instance.file_content_type == 'image/gif' || VIDEO_CONVERTIBLE_MIME_TYPES.include?(f.instance.file_content_type)
        VIDEO_CONVERTED_STYLES
      elsif IMAGE_MIME_TYPES.include?(f.instance.file_content_type)
        IMAGE_STYLES
      elsif VIDEO_MIME_TYPES.include?(f.instance.file_content_type)
        VIDEO_STYLES
      else
        AUDIO_STYLES
      end
    end

    def file_processors(f)
      if f.file_content_type == 'image/gif'
        [:gif_transcoder, :blurhash_transcoder]
      elsif VIDEO_MIME_TYPES.include?(f.file_content_type)
        [:video_transcoder, :blurhash_transcoder, :type_corrector]
      elsif AUDIO_MIME_TYPES.include?(f.file_content_type)
        [:transcoder, :type_corrector]
      else
        [:lazy_thumbnail, :blurhash_transcoder, :type_corrector]
      end
    end
  end

  private

  def set_shortcode
    self.type = :unknown if file.blank? && !type_changed?

    return unless local?

    loop do
      self.shortcode = SecureRandom.urlsafe_base64(14)
      break if MediaAttachment.find_by(shortcode: shortcode).nil?
    end
  end

  def prepare_description
    self.description = description.strip[0...MAX_DESCRIPTION_LENGTH] unless description.nil?
  end

  def set_type_and_extension
    self.type = begin
      if VIDEO_MIME_TYPES.include?(file_content_type)
        :video
      elsif AUDIO_MIME_TYPES.include?(file_content_type)
        :audio
      else
        :image
      end
    end
  end

  def set_processing
    self.processing = delay_processing? ? :queued : :complete
  end

  def check_video_dimensions
    return unless (video? || gifv?) && file.queued_for_write[:original].present?

    movie = FFMPEG::Movie.new(file.queued_for_write[:original].path)

    return unless movie.valid?

    raise Mastodon::DimensionsValidationError, "#{movie.width}x#{movie.height} videos are not supported" if movie.width * movie.height > MAX_VIDEO_MATRIX_LIMIT
    raise Mastodon::DimensionsValidationError, "#{movie.frame_rate.to_i}fps videos are not supported" if movie.frame_rate > MAX_VIDEO_FRAME_RATE
  end

  def set_meta
    meta = populate_meta

    return if meta == {}

    file.instance_write :meta, meta
  end

  def populate_meta
    meta = file.instance_read(:meta) || {}

    file.queued_for_write.each do |style, file|
      meta[style] = style == :small || image? ? image_geometry(file) : video_metadata(file)
    end

    meta
  end

  def image_geometry(file)
    width, height = FastImage.size(file.path)

    return {} if width.nil?

    {
      width:  width,
      height: height,
      size: "#{width}x#{height}",
      aspect: width.to_f / height,
    }
  end

  def video_metadata(file)
    movie = FFMPEG::Movie.new(file.path)

    return {} unless movie.valid?

    {
      width: movie.width,
      height: movie.height,
      frame_rate: movie.frame_rate,
      duration: movie.duration,
      bitrate: movie.bitrate,
    }.compact
  end

  def enqueue_processing
    PostProcessMediaWorker.perform_async(id) if delay_processing?
  end

  def reset_parent_cache
    Rails.cache.delete("statuses/#{status_id}") if status_id.present?
  end
end