eminuxandCursor
f92ab3a813
L'encoder scende in congestione e risale piano; la regia imposta il pavimento, mostra lo stato del telefono e apre il selettore dal bitrate colorato. Co-authored-by: Cursor <cursoragent@cursor.com>
60 lines
2.0 KiB
Ruby
60 lines
2.0 KiB
Ruby
module Sessions
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# Sceglie il preset più alto supportato dall'upload misurato (test rete).
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class SelectQuality
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UPLOAD_HEADROOM = 0.8
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UPLOAD_HEADROOM_1080P = 1.0
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AUTO_ID = "auto"
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AUTO_FLOOR_BITRATE = 800_000
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PRESETS = [
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{ id: "1080p_30_4.5mbps", target_bitrate: 4_500_000, target_fps: 30 },
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{ id: "720p_30_4mbps", target_bitrate: 4_000_000, target_fps: 30 },
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{ id: "720p_30_2.5mbps", target_bitrate: 2_500_000, target_fps: 30 },
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{ id: "720p_30_1.5mbps", target_bitrate: 1_500_000, target_fps: 30 }
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].freeze
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MIN_QUALITY_IDS = ([AUTO_ID] + PRESETS.map { |preset| preset[:id] }).freeze
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def self.floor_bitrate(preset_id)
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return AUTO_FLOOR_BITRATE if preset_id.blank? || preset_id == AUTO_ID
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PRESETS.find { |preset| preset[:id] == preset_id }&.fetch(:target_bitrate) || AUTO_FLOOR_BITRATE
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end
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def self.allowed_min_ids(session_preset)
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ids = [AUTO_ID] + PRESETS.reject { |preset| preset[:id].start_with?("1080p") }.reverse.map { |preset| preset[:id] }
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ids << "1080p_30_4.5mbps" if session_preset.to_s.start_with?("1080p")
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ids
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end
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def self.display_name(preset_id)
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return AUTO_ID if preset_id.blank? || preset_id == AUTO_ID
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preset = PRESETS.find { |item| item[:id] == preset_id }
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return preset_id unless preset
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resolution = preset[:id].start_with?("1080p") ? "1080p" : "720p"
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mbps = preset[:target_bitrate] / 1_000_000.0
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mbps_text = (mbps == mbps.to_i) ? mbps.to_i.to_s : format("%.1f", mbps)
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"#{resolution} · #{mbps_text} Mbps"
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end
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def self.call(upload_mbps:)
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new(upload_mbps: upload_mbps).call
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end
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def initialize(upload_mbps:)
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@upload_mbps = upload_mbps.to_f
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end
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def call
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PRESETS.find { |preset| upload_sufficient?(preset) } || PRESETS.last
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end
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def upload_sufficient?(preset)
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headroom = preset[:id].start_with?("1080p") ? UPLOAD_HEADROOM_1080P : UPLOAD_HEADROOM
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@upload_mbps >= (preset[:target_bitrate] / 1_000_000.0 * headroom)
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end
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end
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end
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