audio_decode 0.2.0

Decode MP3 and Ogg Vorbis to raw PCM in Dart, over FFI. Compiles stb_vorbis and minimp3 from source: self-contained, pure-Dart friendly, no platform plugins or prebuilt binaries.

0.2.0

• Add audioInfo, oggInfo and mp3Info, which return an AudioInfo with sampleRate, channels, frameCount and duration without decoding to PCM. Reading a track's length used to mean decoding the whole file, which for four minutes of 44.1 kHz stereo materializes 40 MB of samples you then throw away. The new calls allocate no PCM: Vorbis answers from the container, and MP3 walks its frame headers with the decoder's synthesis step skipped. Measured on a one-second stereo fixture (Apple M-series, warmed up): Ogg 107 µs against 511 µs for a full decode, MP3 0.9 µs against 217 µs. The reported geometry is checked against decodeAudio for every test fixture.

0.1.3

• Example: show what to do with the decoded PCM, not just how to re-encode it. It now reduces the samples to a one-line waveform (peak amplitude per column, scaled to the loudest column), the primitive a waveform view or a silence detector is built on.

0.1.2

• Docs: sharpen the pub.dev description to lead with the value and the terms people search.

0.1.1

• Move the stb_vorbis and minimp3 attributions out of LICENSE into THIRD_PARTY_NOTICES.md, so LICENSE is the plain MIT text that automated license detection recognises. The attributions themselves are unchanged and still ship with the package.

0.1.0

• Initial release.
• Ogg Vorbis decoding via stb_vorbis and MP3 decoding via minimp3, compiled from source with Dart build hooks.
• decodeAudio, decodeOgg, decodeMp3, detectFormat and PcmAudio.
• encodeWav writes decoded PCM to a 16-bit WAV.