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[FirebaseAI] Add Live Audio screen #1776
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72acfe4
Add live audio screen
daymxn caaa8cd
Add microphone usage description
daymxn ca5df45
Add live screen to xcode project
daymxn 39d50cb
Fix bug in transcript view model
daymxn 693e498
Formatting
daymxn 9b818ff
Fix typo
daymxn 8d53bad
Add docs for extension property
daymxn 74a7349
Remove app check import
daymxn 4bdeea4
Make int16Data not nullable
daymxn 7a2e3ea
Make audio controller an actor
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| { | ||
| "info" : { | ||
| "author" : "xcode", | ||
| "version" : 1 | ||
| } | ||
| } |
35 changes: 35 additions & 0 deletions
35
firebaseai/LiveAudioExample/Assets.xcassets/gemini-logo.imageset/Contents.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| { | ||
| "images" : [ | ||
| { | ||
| "filename" : "gemini-logo.png", | ||
| "idiom" : "universal", | ||
| "resizing" : { | ||
| "cap-insets" : { | ||
| "bottom" : 512, | ||
| "left" : 511, | ||
| "right" : 512, | ||
| "top" : 511 | ||
| }, | ||
| "center" : { | ||
| "height" : 1, | ||
| "mode" : "tile", | ||
| "width" : 1 | ||
| }, | ||
| "mode" : "9-part" | ||
| }, | ||
| "scale" : "1x" | ||
| }, | ||
| { | ||
| "idiom" : "universal", | ||
| "scale" : "2x" | ||
| }, | ||
| { | ||
| "idiom" : "universal", | ||
| "scale" : "3x" | ||
| } | ||
| ], | ||
| "info" : { | ||
| "author" : "xcode", | ||
| "version" : 1 | ||
| } | ||
| } |
Binary file added
BIN
+235 KB
firebaseai/LiveAudioExample/Assets.xcassets/gemini-logo.imageset/gemini-logo.png
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90 changes: 90 additions & 0 deletions
90
firebaseai/LiveAudioExample/Audio/AudioBufferHelpers.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| // Copyright 2025 Google LLC | ||
| // | ||
| // 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. | ||
|
|
||
| import AVFoundation | ||
|
|
||
| extension AVAudioPCMBuffer { | ||
| /// Creates a new `AVAudioPCMBuffer` from a `Data` struct. | ||
| /// | ||
| /// Only works with interleaved data. | ||
| static func fromInterleavedData(data: Data, format: AVAudioFormat) -> AVAudioPCMBuffer? { | ||
| guard format.isInterleaved else { | ||
| fatalError("Only interleaved data is supported") | ||
| } | ||
|
|
||
| let frameCapacity = AVAudioFrameCount(data | ||
| .count / Int(format.streamDescription.pointee.mBytesPerFrame)) | ||
| guard let buffer = AVAudioPCMBuffer(pcmFormat: format, frameCapacity: frameCapacity) else { | ||
| return nil | ||
| } | ||
|
|
||
| buffer.frameLength = frameCapacity | ||
| data.withUnsafeBytes { bytes in | ||
| guard let baseAddress = bytes.baseAddress else { return } | ||
| let dst = buffer.mutableAudioBufferList.pointee.mBuffers | ||
| dst.mData?.copyMemory(from: baseAddress, byteCount: Int(dst.mDataByteSize)) | ||
| } | ||
|
|
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| return buffer | ||
| } | ||
|
|
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| /// Gets the underlying `Data` in this buffer. | ||
| /// | ||
| /// Will throw an error if this buffer doesn't hold int16 data. | ||
| func int16Data() -> Data { | ||
| guard let bufferPtr = audioBufferList.pointee.mBuffers.mData else { | ||
| fatalError("Missing audio buffer list") | ||
| } | ||
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|
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|
|
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| let audioBufferLenth = Int(audioBufferList.pointee.mBuffers.mDataByteSize) | ||
| return Data(bytes: bufferPtr, count: audioBufferLenth) | ||
| } | ||
| } | ||
|
|
||
| extension AVAudioConverter { | ||
| /// Uses the converter to convert the provided `buffer`. | ||
| /// | ||
| /// Will handle determining the proper frame capacity, ensuring formats align, and propogating any errors that occur. | ||
| /// | ||
| /// - Returns: A new buffer, with the converted data. | ||
| func convertBuffer(_ buffer: AVAudioPCMBuffer) -> AVAudioPCMBuffer { | ||
| if buffer.format == outputFormat { return buffer } | ||
| guard buffer.format == inputFormat else { | ||
| fatalError("The buffer's format was different than the converter's input format") | ||
| } | ||
|
|
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| let frameCapacity = AVAudioFrameCount( | ||
| ceil(Double(buffer.frameLength) * outputFormat.sampleRate / inputFormat.sampleRate) | ||
| ) | ||
|
|
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| guard let output = AVAudioPCMBuffer( | ||
| pcmFormat: outputFormat, | ||
| frameCapacity: frameCapacity | ||
| ) else { | ||
| fatalError("Failed to create output buffer") | ||
| } | ||
|
|
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| var error: NSError? | ||
| convert(to: output, error: &error) { _, status in | ||
| status.pointee = .haveData | ||
| return buffer | ||
| } | ||
|
|
||
| if let error { | ||
| fatalError("Failed to convert buffer: \(error.localizedDescription)") | ||
| } | ||
|
|
||
| return output | ||
| } | ||
| } | ||
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