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mp3 encoding using LAME

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This commit is contained in:
Guillem Castro 2024-05-15 19:48:46 +02:00
parent 61d6268524
commit c2b636236d
12 changed files with 467 additions and 51 deletions
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1
.gitignore vendored
View file

@ -1,6 +1,7 @@
/target
.vscode
*.flac
*.mp3
bin
debug/

82
Cargo.lock generated
View file

@ -138,6 +138,15 @@ version = "1.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
[[package]]
name = "autotools"
version = "0.2.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ef941527c41b0fc0dd48511a8154cd5fc7e29200a0ff8b7203c5d777dbc795cf"
dependencies = [
"cc",
]
[[package]]
name = "backtrace"
version = "0.3.71"
@ -369,6 +378,25 @@ dependencies = [
"crossbeam-utils",
]
[[package]]
name = "crossbeam-deque"
version = "0.8.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "613f8cc01fe9cf1a3eb3d7f488fd2fa8388403e97039e2f73692932e291a770d"
dependencies = [
"crossbeam-epoch",
"crossbeam-utils",
]
[[package]]
name = "crossbeam-epoch"
version = "0.9.18"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
dependencies = [
"crossbeam-utils",
]
[[package]]
name = "crossbeam-utils"
version = "0.8.19"
@ -1342,6 +1370,27 @@ dependencies = [
"windows-sys 0.48.0",
]
[[package]]
name = "mp3lame-encoder"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "64622e64e2f9ee2a2fee97a6f53bd8b0301fa0fd15f2f4152f910091949689c7"
dependencies = [
"libc",
"mp3lame-sys",
]
[[package]]
name = "mp3lame-sys"
version = "0.1.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "99896fd43ed58e957c164c5f4a1e7d8e770f358835cc6920b2eab7ab6d1a7106"
dependencies = [
"autotools",
"cc",
"libc",
]
[[package]]
name = "mp4ameta"
version = "0.11.0"
@ -1697,6 +1746,26 @@ dependencies = [
"rand",
]
[[package]]
name = "rayon"
version = "1.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
dependencies = [
"either",
"rayon-core",
]
[[package]]
name = "rayon-core"
version = "1.12.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1465873a3dfdaa8ae7cb14b4383657caab0b3e8a0aa9ae8e04b044854c8dfce2"
dependencies = [
"crossbeam-deque",
"crossbeam-utils",
]
[[package]]
name = "readme-rustdocifier"
version = "0.1.1"
@ -2002,14 +2071,17 @@ dependencies = [
"audiotags",
"dirs",
"flacenc",
"futures",
"indicatif",
"lazy_static",
"librespot",
"machine-uid",
"mp3lame-encoder",
"regex",
"rpassword 7.3.1",
"structopt",
"tokio",
"tokio-rayon",
"tracing",
"tracing-subscriber",
]
@ -2188,6 +2260,16 @@ dependencies = [
"syn 2.0.63",
]
[[package]]
name = "tokio-rayon"
version = "2.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7cf33a76e0b1dd03b778f83244137bd59887abf25c0e87bc3e7071105f457693"
dependencies = [
"rayon",
"tokio",
]
[[package]]
name = "tokio-stream"
version = "0.1.15"

7
Cargo.toml
View file

@ -25,3 +25,10 @@ tracing-subscriber = { version = "0.3", features = ["env-filter", "registry"] }
lazy_static = "1.4"
async-trait = "0.1"
dirs = "5.0"
mp3lame-encoder = { version = "0.1.5", optional = true }
tokio-rayon = "2.1"
futures = "0.3"
[features]
default = ["mp3"]
mp3 = ["dep:mp3lame-encoder"]

82
src/channel_sink.rs Normal file
View file

@ -0,0 +1,82 @@
use librespot::playback::audio_backend::Sink;
use librespot::playback::audio_backend::SinkError;
use librespot::playback::convert::Converter;
use librespot::playback::decoder::AudioPacket;
use crate::track::TrackMetadata;
pub enum SinkEvent {
Write { bytes: usize, total: usize, content: Vec<i32> },
Finished,
}
pub type SinkEventChannel = tokio::sync::mpsc::UnboundedReceiver<SinkEvent>;
pub struct ChannelSink {
sender: tokio::sync::mpsc::UnboundedSender<SinkEvent>,
bytes_total: usize,
bytes_sent: usize,
}
impl ChannelSink {
pub fn new(track: TrackMetadata) -> (Self, SinkEventChannel) {
let (tx, rx) = tokio::sync::mpsc::unbounded_channel();
(
ChannelSink {
sender: tx,
bytes_sent: 0,
bytes_total: Self::convert_track_duration_to_size(&track),
},
rx,
)
}
fn convert_track_duration_to_size(metadata: &TrackMetadata) -> usize {
let duration = metadata.duration / 1000;
let sample_rate = 44100;
let channels = 2;
let bits_per_sample = 16;
let bytes_per_sample = bits_per_sample / 8;
(duration as usize) * sample_rate * channels * bytes_per_sample * 2
}
pub fn get_approximate_size(&self) -> usize {
self.bytes_total
}
}
impl Sink for ChannelSink {
fn start(&mut self) -> Result<(), SinkError> {
Ok(())
}
fn stop(&mut self) -> Result<(), SinkError> {
tracing::info!("Finished sending song");
self.sender
.send(SinkEvent::Finished)
.map_err(|_| SinkError::OnWrite("Failed to send finished event".to_string()))?;
Ok(())
}
fn write(&mut self, packet: AudioPacket, converter: &mut Converter) -> Result<(), SinkError> {
let data = converter.f64_to_s16(
packet
.samples()
.map_err(|_| SinkError::OnWrite("Failed to get samples".to_string()))?,
);
let data32: Vec<i32> = data.iter().map(|el| i32::from(*el)).collect();
self.bytes_sent += data32.len() * std::mem::size_of::<i32>();
self.sender
.send(SinkEvent::Write {
bytes: self.bytes_sent,
total: self.bytes_total,
content: data32,
})
.map_err(|_| SinkError::OnWrite("Failed to send event".to_string()))?;
Ok(())
}
}

86
src/download.rs
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@ -3,6 +3,8 @@ use std::path::PathBuf;
use std::sync::Arc;
use anyhow::Result;
use futures::StreamExt;
use futures::TryStreamExt;
use indicatif::MultiProgress;
use indicatif::ProgressBar;
use indicatif::ProgressState;
@ -13,8 +15,10 @@ use librespot::playback::mixer::NoOpVolume;
use librespot::playback::mixer::VolumeGetter;
use librespot::playback::player::Player;
use crate::file_sink::FileSink;
use crate::file_sink::SinkEvent;
use crate::channel_sink::ChannelSink;
use crate::encoder::Format;
use crate::encoder::Samples;
use crate::channel_sink::SinkEvent;
use crate::track::Track;
use crate::track::TrackMetadata;
@ -29,16 +33,18 @@ pub struct DownloadOptions {
pub destination: PathBuf,
pub compression: Option<u32>,
pub parallel: usize,
pub format: Format,
}
impl DownloadOptions {
pub fn new(destination: Option<String>, compression: Option<u32>, parallel: usize) -> Self {
pub fn new(destination: Option<String>, compression: Option<u32>, parallel: usize, format: Format) -> Self {
let destination =
destination.map_or_else(|| std::env::current_dir().unwrap(), PathBuf::from);
DownloadOptions {
destination,
compression,
parallel,
format
}
}
}
@ -57,23 +63,13 @@ impl Downloader {
tracks: Vec<Track>,
options: &DownloadOptions,
) -> Result<()> {
let this = Arc::new(self);
let chunks = tracks.chunks(options.parallel);
for chunk in chunks {
let mut tasks = Vec::new();
for track in chunk {
let t = track.clone();
let downloader = this.clone();
let options = options.clone();
tasks.push(tokio::spawn(async move {
downloader.download_track(t, &options).await
}));
}
for task in tasks {
task.await??;
}
}
futures::stream::iter(tracks)
.map(|track| {
self.download_track(track, &options)
})
.buffer_unordered(options.parallel)
.try_collect::<Vec<_>>()
.await?;
Ok(())
}
@ -87,20 +83,20 @@ impl Downloader {
let path = options
.destination
.join(file_name.clone())
.with_extension("flac")
.with_extension(options.format.extension())
.to_str()
.ok_or(anyhow::anyhow!("Could not set the output path"))?
.to_string();
let (file_sink, mut sink_channel) = FileSink::new(path.to_string(), metadata);
let (sink, mut sink_channel) = ChannelSink::new(metadata);
let file_size = file_sink.get_approximate_size();
let file_size = sink.get_approximate_size();
let (mut player, _) = Player::new(
self.player_config.clone(),
self.session.clone(),
self.volume_getter(),
move || Box::new(file_sink),
move || Box::new(sink),
);
let pb = self.progress_bar.add(ProgressBar::new(file_size as u64));
@ -111,25 +107,39 @@ impl Downloader {
player.load(track.id, true, 0);
let name = file_name.clone();
let mut samples = Vec::<i32>::new();
tokio::spawn(async move {
while let Some(event) = sink_channel.recv().await {
match event {
SinkEvent::Written { bytes, total } => {
tracing::trace!("Written {} bytes out of {}", bytes, total);
pb.set_position(bytes as u64);
}
SinkEvent::Finished => {
pb.finish_with_message(format!("Downloaded {}", name));
}
}
}
player.await_end_of_track().await;
player.stop();
});
player.await_end_of_track().await;
player.stop();
while let Some(event) = sink_channel.recv().await {
match event {
SinkEvent::Write { bytes, total, mut content } => {
tracing::trace!("Written {} bytes out of {}", bytes, total);
pb.set_position(bytes as u64);
samples.append(&mut content);
}
SinkEvent::Finished => {
pb.finish_with_message(format!("Downloaded {}", &file_name));
}
}
}
tracing::info!("Downloaded track: {:?}", file_name);
let samples = Samples::new(samples, 44100, 2, 16);
let format = options.format.clone();
tokio_rayon::spawn(move || {
tracing::info!("Encoding track: {:?}", file_name);
let encoder = crate::encoder::get_encoder(format).unwrap();
let stream = encoder.encode(samples).unwrap();
tracing::info!("Writing track: {:?} to file: {}", file_name, &path);
stream.write_to_file(&path).unwrap();
}).await;
Ok(())
}

44
src/encoder/flac.rs Normal file
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@ -0,0 +1,44 @@
use flacenc::bitsink::ByteSink;
use flacenc::component::BitRepr;
use flacenc::error::Verified;
use flacenc::error::Verify;
use super::EncodedStream;
use super::Encoder;
use super::Samples;
#[derive(Debug)]
pub struct FlacEncoder {
config: Verified<flacenc::config::Encoder>,
}
impl FlacEncoder {
pub fn new() -> anyhow::Result<Self> {
let config = flacenc::config::Encoder::default()
.into_verified()
.map_err(|e| anyhow::anyhow!("Failed to verify encoder config: {:?}", e))?;
Ok(FlacEncoder { config })
}
}
impl Encoder for FlacEncoder {
fn encode(&self, samples: Samples) -> anyhow::Result<EncodedStream> {
let source = flacenc::source::MemSource::from_samples(
&samples.samples,
samples.channels as usize,
samples.bits_per_sample as usize,
samples.sample_rate as usize,
);
let flac_stream =
flacenc::encode_with_fixed_block_size(&self.config, source, self.config.block_size)
.map_err(|e| anyhow::anyhow!("Failed to encode flac: {:?}", e))?;
let mut byte_sink = ByteSink::new();
flac_stream
.write(&mut byte_sink)
.map_err(|e| anyhow::anyhow!("Failed to write flac stream: {:?}", e))?;
Ok(EncodedStream::new(byte_sink.into_inner()))
}
}

99
src/encoder/mod.rs Normal file
View file

@ -0,0 +1,99 @@
mod flac;
#[cfg(feature = "mp3")]
mod mp3;
use std::str::FromStr;
use anyhow::Result;
use lazy_static::lazy_static;
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub enum Format {
Flac,
#[cfg(feature = "mp3")]
Mp3,
}
impl FromStr for Format {
type Err = anyhow::Error;
fn from_str(s: &str) -> Result<Self> {
match s {
"flac" => Ok(Format::Flac),
#[cfg(feature = "mp3")]
"mp3" => Ok(Format::Mp3),
_ => Err(anyhow::anyhow!("Unsupported format")),
}
}
}
impl Format {
pub fn extension(&self) -> &'static str {
match self {
Format::Flac => "flac",
#[cfg(feature = "mp3")]
Format::Mp3 => "mp3",
}
}
}
lazy_static!(
static ref FLAC_ENCODER : Box<dyn Encoder + Sync> = Box::new(flac::FlacEncoder::new().unwrap());
#[cfg(feature = "mp3")]
static ref MP3_ENCODER : Box<dyn Encoder + Sync> = Box::new(mp3::Mp3Encoder {});
);
pub fn get_encoder(format: Format) -> anyhow::Result<&'static Box<dyn Encoder + Sync>> {
match format {
Format::Flac => Ok(&FLAC_ENCODER),
#[cfg(feature = "mp3")]
Format::Mp3 => Ok(&MP3_ENCODER),
_ => Err(anyhow::anyhow!("Unsupported format")),
}
}
pub trait Encoder {
fn encode(&self, samples: Samples) -> Result<EncodedStream>;
}
pub struct Samples {
pub samples: Vec<i32>,
pub sample_rate: u32,
pub channels: u32,
pub bits_per_sample: u32,
}
impl Samples {
pub fn new(samples: Vec<i32>, sample_rate: u32, channels: u32, bits_per_sample: u32) -> Self {
Samples {
samples,
sample_rate,
channels,
bits_per_sample,
}
}
}
pub struct EncodedStream {
pub stream: Vec<u8>,
}
impl EncodedStream {
pub fn new(stream: Vec<u8>) -> Self {
EncodedStream { stream }
}
pub fn write_to_file<P: std::convert::AsRef<std::path::Path>>(&self, path: P) -> Result<()> {
if !path.as_ref().exists() {
std::fs::create_dir_all(
path.as_ref()
.parent()
.ok_or(anyhow::anyhow!("Could not create path"))?,
)?;
}
std::fs::write(path, &self.stream)?;
Ok(())
}
}

52
src/encoder/mp3.rs Normal file
View file

@ -0,0 +1,52 @@
use anyhow::anyhow;
use anyhow::Ok;
use mp3lame_encoder::Builder;
use mp3lame_encoder::FlushNoGap;
use mp3lame_encoder::InterleavedPcm;
use super::Samples;
use super::Encoder;
use super::EncodedStream;
pub struct Mp3Encoder;
impl Mp3Encoder {
fn build_encoder(&self, sample_rate: u32, channels: u32) -> anyhow::Result<mp3lame_encoder::Encoder> {
let mut builder = Builder::new().
ok_or(anyhow::anyhow!("Failed to create mp3 encoder"))?;
builder.set_sample_rate(sample_rate)
.map_err(|e| anyhow::anyhow!("Failed to set sample rate for mp3 encoder: {}", e))?;
builder.set_num_channels(channels as u8)
.map_err(|e| anyhow::anyhow!("Failed to set number of channels for mp3 encoder: {}", e))?;
builder.set_brate(mp3lame_encoder::Birtate::Kbps160)
.map_err(|e| anyhow::anyhow!("Failed to set bitrate for mp3 encoder: {}", e))?;
builder.build()
.map_err(|e| anyhow::anyhow!("Failed to build mp3 encoder: {}", e))
}
}
impl Encoder for Mp3Encoder {
fn encode(&self, samples: Samples) -> anyhow::Result<EncodedStream> {
let mut mp3_encoder = self.build_encoder(samples.sample_rate, samples.channels)?;
let samples: Vec<i16> = samples.samples.iter().map(|&x| x as i16).collect();
let input = InterleavedPcm(samples.as_slice());
let mut mp3_out_buffer = Vec::new();
mp3_out_buffer.reserve(mp3lame_encoder::max_required_buffer_size(samples.len()));
let encoded_size = mp3_encoder.encode(input, mp3_out_buffer.spare_capacity_mut())
.map_err(|e| anyhow!("Failed to encode mp3: {}", e))?;
unsafe {
mp3_out_buffer.set_len(mp3_out_buffer.len().wrapping_add(encoded_size));
}
let encoded_size = mp3_encoder.flush::<FlushNoGap>(mp3_out_buffer.spare_capacity_mut())
.map_err(|e| anyhow!("Failed to flush mp3 encoder: {}", e))?;
unsafe {
mp3_out_buffer.set_len(mp3_out_buffer.len().wrapping_add(encoded_size));
}
Ok(EncodedStream::new(mp3_out_buffer))
}
}

48
src/file_sink.rs
View file

@ -9,6 +9,8 @@ use librespot::playback::audio_backend::SinkError;
use librespot::playback::convert::Converter;
use librespot::playback::decoder::AudioPacket;
use crate::encoder::get_encoder;
use crate::encoder::Samples;
use crate::track::TrackMetadata;
pub enum SinkEvent {
@ -67,18 +69,42 @@ impl Sink for FileSink {
fn stop(&mut self) -> Result<(), SinkError> {
tracing::info!("Writing to file: {:?}", &self.sink);
let config = flacenc::config::Encoder::default()
.into_verified()
.map_err(|_| SinkError::OnWrite("Failed to create flac encoder".to_string()))?;
let source = flacenc::source::MemSource::from_samples(&self.content, 2, 16, 44100);
let flac_stream = flacenc::encode_with_fixed_block_size(&config, source, config.block_size)
.map_err(|_| SinkError::OnWrite("Failed to encode flac".to_string()))?;
let mut sink = flacenc::bitsink::ByteSink::new();
flac_stream
.write(&mut sink)
.map_err(|_| SinkError::OnWrite("Failed to write flac to sink".to_string()))?;
std::fs::write(&self.sink, sink.as_slice())
// let config = flacenc::config::Encoder::default()
// .into_verified()
// .map_err(|_| SinkError::OnWrite("Failed to create flac encoder".to_string()))?;
// let source = flacenc::source::MemSource::from_samples(&self.content, 2, 16, 44100);
// let flac_stream = flacenc::encode_with_fixed_block_size(&config, source, config.block_size)
// .map_err(|_| SinkError::OnWrite("Failed to encode flac".to_string()))?;
// let mut sink = flacenc::bitsink::ByteSink::new();
// flac_stream
// .write(&mut sink)
// .map_err(|_| SinkError::OnWrite("Failed to write flac to sink".to_string()))?;
// std::fs::write(&self.sink, sink.as_slice())
// .map_err(|_| SinkError::OnWrite("Failed to write flac to file".to_string()))?;
let flac_enc = get_encoder(crate::encoder::Format::Flac)
.map_err(|_| SinkError::OnWrite("Failed to get flac encoder".to_string()))?;
let mp3_enc = get_encoder(crate::encoder::Format::Mp3)
.map_err(|_| SinkError::OnWrite("Failed to get mp3 encoder".to_string()))?;
let flac_stream = flac_enc.encode(Samples::new(
self.content.clone(),
44100,
2,
16,
))
.map_err(|_| SinkError::OnWrite("Failed to encode flac".to_string()))?;
let mp3_stream = mp3_enc.encode(Samples::new(
self.content.clone(),
44100,
2,
16,
))
.map_err(|_| SinkError::OnWrite("Failed to encode mp3".to_string()))?;
flac_stream.write_to_file(&self.sink)
.map_err(|_| SinkError::OnWrite("Failed to write flac to file".to_string()))?;
mp3_stream.write_to_file(&self.sink)
.map_err(|_| SinkError::OnWrite("Failed to write mp3 to file".to_string()))?;
let mut tag = Tag::new()
.with_tag_type(TagType::Flac)

2
src/lib.rs
View file

@ -1,4 +1,6 @@
pub mod download;
pub mod file_sink;
pub mod channel_sink;
pub mod session;
pub mod track;
pub mod encoder;

10
src/main.rs
View file

@ -1,4 +1,5 @@
use spotify_dl::download::{DownloadOptions, Downloader};
use spotify_dl::encoder::Format;
use spotify_dl::session::create_session;
use spotify_dl::track::get_tracks;
use structopt::StructOpt;
@ -41,6 +42,13 @@ struct Opt {
default_value = "5"
)]
parallel: usize,
#[structopt(
short = "f",
long = "format",
help = "The format to download the tracks in. Default is flac.",
default_value = "flac"
)]
format: Format
}
pub fn configure_logger() {
@ -84,7 +92,7 @@ async fn main() -> anyhow::Result<()> {
downloader
.download_tracks(
track,
&DownloadOptions::new(opt.destination, opt.compression, opt.parallel),
&DownloadOptions::new(opt.destination, opt.compression, opt.parallel, opt.format),
)
.await
}

5
src/track.rs
View file

@ -14,6 +14,7 @@ trait TrackCollection {
pub async fn get_tracks(spotify_ids: Vec<String>, session: &Session) -> Result<Vec<Track>> {
let mut tracks: Vec<Track> = Vec::new();
for id in spotify_ids {
tracing::debug!("Getting tracks for: {}", id);
let id = parse_uri_or_url(&id).ok_or(anyhow::anyhow!("Invalid track"))?;
let new_tracks = match id.audio_type {
librespot::core::spotify_id::SpotifyAudioType::Track => vec![Track::from_id(id)],
@ -39,7 +40,9 @@ fn parse_uri_or_url(track: &str) -> Option<SpotifyId> {
}
fn parse_uri(track_uri: &str) -> Option<SpotifyId> {
SpotifyId::from_uri(track_uri).ok()
let res = SpotifyId::from_uri(track_uri);
tracing::info!("Parsed URI: {:?}", res);
res.ok()
}
fn parse_url(track_url: &str) -> Option<SpotifyId> {