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passage à de l'encodage rééelement en flux

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Eric Coissac
2025-10-26 23:00:31 +01:00
parent 217ebb84c9
commit 078d6cb5f8
4 changed files with 260 additions and 0 deletions
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80
Cargo.lock generated
View File

@@ -443,6 +443,24 @@ dependencies = [
"disqualified",
]
[[package]]
name = "bindgen"
version = "0.72.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "993776b509cfb49c750f11b8f07a46fa23e0a1386ffc01fb1e7d343efc387895"
dependencies = [
"bitflags 2.9.4",
"cexpr",
"clang-sys",
"itertools",
"proc-macro2",
"quote",
"regex",
"rustc-hash",
"shlex",
"syn 2.0.106",
]
[[package]]
name = "bit_field"
version = "0.10.3"
@@ -547,6 +565,15 @@ dependencies = [
"shlex",
]
[[package]]
name = "cexpr"
version = "0.6.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6fac387a98bb7c37292057cffc56d62ecb629900026402633ae9160df93a8766"
dependencies = [
"nom",
]
[[package]]
name = "cfg-expr"
version = "0.15.8"
@@ -577,6 +604,17 @@ dependencies = [
"windows-link 0.2.0",
]
[[package]]
name = "clang-sys"
version = "1.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0b023947811758c97c59bf9d1c188fd619ad4718dcaa767947df1cadb14f39f4"
dependencies = [
"glob",
"libc",
"libloading",
]
[[package]]
name = "claxon"
version = "0.4.3"
@@ -1073,6 +1111,31 @@ dependencies = [
"simd-adler32",
]
[[package]]
name = "ffmpeg-next"
version = "8.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d658424d233cbd993a972dd73a66ca733acd12a494c68995c9ac32ae1fe65b40"
dependencies = [
"bitflags 2.9.4",
"ffmpeg-sys-next",
"libc",
]
[[package]]
name = "ffmpeg-sys-next"
version = "8.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9bca20aa4ee774fe384c2490096c122b0b23cf524a9910add0686691003d797b"
dependencies = [
"bindgen",
"cc",
"libc",
"num_cpus",
"pkg-config",
"vcpkg",
]
[[package]]
name = "find-msvc-tools"
version = "0.1.2"
@@ -1934,6 +1997,16 @@ dependencies = [
"cc",
]
[[package]]
name = "libloading"
version = "0.8.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d7c4b02199fee7c5d21a5ae7d8cfa79a6ef5bb2fc834d6e9058e89c825efdc55"
dependencies = [
"cfg-if",
"windows-link 0.2.0",
]
[[package]]
name = "libredox"
version = "0.1.10"
@@ -2678,6 +2751,7 @@ dependencies = [
"bytes",
"chrono",
"claxon",
"ffmpeg-next",
"flacenc 0.5.0",
"futures",
"hex",
@@ -3321,6 +3395,12 @@ version = "0.1.26"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "56f7d92ca342cea22a06f2121d944b4fd82af56988c270852495420f961d4ace"
[[package]]
name = "rustc-hash"
version = "2.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
[[package]]
name = "rustc_version"
version = "0.4.1"

5
pmoparadise/Cargo.toml
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@@ -51,6 +51,9 @@ symphonia = { version = "0.5", features = ["all"] }
# Audio decoding - claxon for FLAC streaming
claxon = "0.4"
# FFmpeg for progressive streaming (decoding + encoding) - optional
ffmpeg-next = { version = "8.0", optional = true }
# Per-track feature dependencies
hound = { version = "3.5", optional = true }
tempfile = { version = "3.8", optional = true }
@@ -85,6 +88,8 @@ server = ["pmosource/server", "pmoconfig"]
pmoconfig = ["dep:pmoconfig"]
# Feature cache (deprecated - toujours actif maintenant)
cache = []
# Active le streaming progressif avec FFmpeg (latence réduite)
ffmpeg = ["dep:ffmpeg-next"]
[dev-dependencies]
# Tests

172
pmoparadise/src/ffmpeg_streaming.rs Normal file
View File

@@ -0,0 +1,172 @@
//! FFmpeg-based progressive streaming decoder/encoder
//!
//! This module provides progressive audio streaming using FFmpeg,
//! allowing for much lower latency than the claxon/flacenc approach.
//!
//! Key advantages:
//! - Start streaming immediately (< 1 second latency)
//! - Progressive decoding and encoding in a pipeline
//! - Better performance (C code vs Rust)
//! - Support for multiple output formats
use anyhow::{anyhow, Context, Result};
use bytes::Bytes;
use ffmpeg_next as ffmpeg;
use std::io::{Read, Write};
use std::sync::mpsc::{sync_channel, Receiver, SyncSender};
use tokio::task;
use tracing::{debug, error, trace};
/// Initialize FFmpeg (must be called once at startup)
pub fn init() -> Result<()> {
ffmpeg::init().context("Failed to initialize FFmpeg")?;
Ok(())
}
/// PCM chunk with decoded audio data
#[derive(Debug, Clone)]
pub struct PCMChunk {
pub samples: Vec<i16>, // Interleaved 16-bit samples
pub sample_rate: u32,
pub channels: u32,
pub position_ms: u64,
}
/// Progressive decoder that decodes FLAC data as it arrives
pub struct ProgressiveDecoder {
input_rx: Receiver<Result<Bytes, String>>,
buffer: Vec<u8>,
decoder_ctx: Option<ffmpeg::codec::context::Context>,
sample_rate: u32,
channels: u32,
total_samples_decoded: u64,
}
impl ProgressiveDecoder {
/// Create a new progressive decoder from a byte stream
pub fn new(mut stream: impl Read + Send + 'static) -> Result<Self> {
let (tx, rx) = sync_channel(64);
// Spawn a thread to read from the stream and feed chunks
std::thread::spawn(move || {
let mut buffer = vec![0u8; 8192];
loop {
match stream.read(&mut buffer) {
Ok(0) => break, // EOF
Ok(n) => {
let chunk = Bytes::copy_from_slice(&buffer[..n]);
if tx.send(Ok(chunk)).is_err() {
break;
}
}
Err(e) => {
let _ = tx.send(Err(e.to_string()));
break;
}
}
}
});
Ok(Self {
input_rx: rx,
buffer: Vec::with_capacity(65536),
decoder_ctx: None,
sample_rate: 0,
channels: 0,
total_samples_decoded: 0,
})
}
/// Decode the next chunk of PCM data
pub fn decode_chunk(&mut self) -> Result<Option<PCMChunk>> {
// Receive more data from the stream
while self.buffer.len() < 4096 {
match self.input_rx.try_recv() {
Ok(Ok(bytes)) => {
self.buffer.extend_from_slice(&bytes);
}
Ok(Err(e)) => {
return Err(anyhow!("Stream error: {}", e));
}
Err(std::sync::mpsc::TryRecvError::Empty) => {
// No more data available right now
break;
}
Err(std::sync::mpsc::TryRecvError::Disconnected) => {
// Stream ended
if self.buffer.is_empty() {
return Ok(None);
}
break;
}
}
}
if self.buffer.is_empty() {
return Ok(None);
}
// Initialize decoder on first call
if self.decoder_ctx.is_none() {
self.init_decoder()?;
}
// Decode a frame
// TODO: Implement actual FFmpeg decoding
// For now, return a placeholder
Ok(None)
}
fn init_decoder(&mut self) -> Result<()> {
// TODO: Initialize FFmpeg decoder from buffer
// Parse FLAC header, create decoder context
Ok(())
}
}
/// Progressive encoder that encodes PCM to FLAC as data arrives
pub struct ProgressiveEncoder {
output_tx: SyncSender<Bytes>,
encoder_ctx: Option<ffmpeg::codec::context::Context>,
sample_rate: u32,
channels: u32,
}
impl ProgressiveEncoder {
/// Create a new progressive encoder
pub fn new(sample_rate: u32, channels: u32) -> Result<(Self, Receiver<Bytes>)> {
let (tx, rx) = sync_channel(64);
let encoder = Self {
output_tx: tx,
encoder_ctx: None,
sample_rate,
channels,
};
Ok((encoder, rx))
}
/// Encode a chunk of PCM data
pub fn encode_chunk(&mut self, pcm: &PCMChunk) -> Result<()> {
// TODO: Implement FFmpeg encoding
Ok(())
}
/// Flush any remaining encoded data
pub fn flush(&mut self) -> Result<()> {
// TODO: Flush encoder
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_ffmpeg_init() {
assert!(init().is_ok());
}
}

3
pmoparadise/src/lib.rs
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@@ -229,6 +229,9 @@ pub mod streaming;
#[cfg(feature = "per-track")]
pub mod track;
#[cfg(feature = "ffmpeg")]
pub mod ffmpeg_streaming;
#[cfg(feature = "pmoserver")]
pub mod pmoserver_ext;