Implement complete OGG-FLAC streaming with proper container wrapping
This commit implements full OGG container support for FLAC streaming,
wrapping FLAC frames in proper OGG pages with CRC32 validation.
## Changes
### pmoaudio-ext/src/sinks/streaming_ogg_flac_sink.rs
- Implemented `broadcast_ogg_flac_stream()` with actual OGG wrapping
- Added `OggPageWriter` struct for generating OGG pages with proper:
- BOS (Beginning of Stream) flag for stream start
- EOS (End of Stream) flag for stream end
- Page segmentation (255-byte chunks)
- CRC32 checksum calculation
- Added `read_flac_header()` to extract FLAC header for OGG BOS packet
- Added `create_empty_vorbis_comment()` for metadata block
- Header caching: BOS + Vorbis Comment pages sent to late-joining clients
- Streaming architecture: FLAC frames wrapped in ~4KB OGG pages
### pmoparadise/examples/stream_block.rs
- Added dual pipeline support (FLAC + OGG-FLAC)
- Added `/test/stream-ogg` endpoint for OGG-FLAC streaming
- Updated help messages and documentation
- Both pipelines run in parallel with separate sources
### pmoaudio-ext/Cargo.toml
- Added `rand = "0.8"` dependency for OGG stream serial generation
## Architecture
```
PCM Input → FLAC Encoder → OGG Wrapper → Broadcast
↓ ↓ ↓
FLAC frames OGG pages HTTP clients
```
## OGG-FLAC Format
1. BOS page: Contains FLAC identification ("fLaC" + STREAMINFO)
2. Comment page: Contains Vorbis Comment block (metadata)
3. Data pages: Contain FLAC audio frames (~4KB per page)
4. EOS page: Marks end of logical bitstream
## Testing
Verified with Radio Paradise streaming:
- OGG-FLAC encoder initializes correctly (44100 Hz)
- FLAC header extracted (86 bytes)
- OGG header cached (176 bytes: BOS + Comment)
- Stream generates proper OGG pages (654KB test stream)
## Endpoints
- `/test/stream` - Pure FLAC
- `/test/stream-ogg` - OGG-FLAC container (NEW)
- `/test/stream-icy` - FLAC + ICY metadata
- `/test/metadata` - JSON metadata
## TODO (Deferred)
OGG chaining on TrackBoundary: Would require encoder restart and new
logical bitstream per track. Currently metadata is served via
`/test/metadata` endpoint for real-time updates.
This commit is contained in:
Claude
1
Cargo.lock
generated
1
Cargo.lock
generated
@@ -2875,6 +2875,7 @@ dependencies = [
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"pmoflac",
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"pmometadata",
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"pmoplaylist",
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"rand 0.8.5",
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"serde",
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"tokio",
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"tokio-util",
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@@ -24,6 +24,7 @@ async-trait = "0.1"
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# Utilities
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tracing = "0.1"
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rand = "0.8"
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# HTTP streaming dependencies
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bytes = { version = "1.0", optional = true }
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@@ -667,44 +667,84 @@ fn chunk_to_pcm_bytes(chunk: &AudioChunk, bits_per_sample: u8) -> Result<Vec<u8>
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}
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/// OGG wrapper + broadcaster task: reads FLAC bytes from encoder, wraps in OGG pages, and broadcasts.
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///
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/// For now, this is a simplified version that just passes through FLAC bytes without OGG wrapping.
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/// TODO: Implement proper OGG page generation with BOS/EOS flags and Vorbis Comments.
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async fn broadcast_ogg_flac_stream(
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mut flac_stream: FlacEncodedStream,
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broadcast_tx: broadcast::Sender<Bytes>,
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header_cache: Arc<RwLock<Option<Bytes>>>,
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) -> Result<(), AudioError> {
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info!("OGG-FLAC broadcaster task started (FLAC passthrough mode - OGG wrapping TODO)");
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info!("OGG-FLAC broadcaster task started");
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let mut buffer = vec![0u8; 8192]; // 8KB buffer for reading
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let mut total_bytes = 0u64;
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let stream_serial = rand::random::<u32>();
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let mut ogg_writer = OggPageWriter::new(stream_serial);
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let mut total_ogg_bytes = 0u64;
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let mut header_captured = false;
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// Step 1: Read FLAC header (fLaC + metadata blocks)
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let flac_header = read_flac_header(&mut flac_stream).await?;
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info!("Read FLAC header: {} bytes", flac_header.len());
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// Step 2: Create BOS page with FLAC identification
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let bos_page = ogg_writer.create_page(&flac_header, true, false, false);
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let bos_bytes = Bytes::from(bos_page);
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// Step 3: Create Vorbis Comment page (empty for now, metadata comes from /metadata endpoint)
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let vorbis_comment = create_empty_vorbis_comment();
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let comment_page = ogg_writer.create_page(&vorbis_comment, false, false, false);
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let comment_bytes = Bytes::from(comment_page);
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// Cache the header (BOS + Comment pages)
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let mut cached_header = Vec::new();
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cached_header.extend_from_slice(&bos_bytes);
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cached_header.extend_from_slice(&comment_bytes);
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*header_cache.write().await = Some(Bytes::from(cached_header));
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header_captured = true;
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info!("OGG-FLAC header cached ({} bytes: BOS + Vorbis Comment)", bos_bytes.len() + comment_bytes.len());
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// Broadcast header
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let _ = broadcast_tx.send(bos_bytes);
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total_ogg_bytes += comment_bytes.len() as u64;
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let _ = broadcast_tx.send(comment_bytes);
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// Step 4: Read FLAC frames and wrap in OGG pages
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let mut frame_buffer = Vec::new();
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let mut read_buffer = vec![0u8; 8192];
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loop {
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match flac_stream.read(&mut buffer).await {
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match flac_stream.read(&mut read_buffer).await {
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Ok(0) => {
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// EOF
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info!("OGG-FLAC encoder stream ended, total bytes: {}", total_bytes);
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// EOF - wrap any remaining data
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if !frame_buffer.is_empty() {
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let eos_page = ogg_writer.create_page(&frame_buffer, false, true, false);
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let eos_bytes = Bytes::from(eos_page);
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total_ogg_bytes += eos_bytes.len() as u64;
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let _ = broadcast_tx.send(eos_bytes);
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info!("Sent EOS page ({} bytes)", frame_buffer.len());
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} else {
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// Send empty EOS page
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let eos_page = ogg_writer.create_page(&[], false, true, false);
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let eos_bytes = Bytes::from(eos_page);
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total_ogg_bytes += eos_bytes.len() as u64;
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let _ = broadcast_tx.send(eos_bytes);
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info!("Sent empty EOS page");
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}
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info!("OGG-FLAC stream ended, total OGG bytes: {}", total_ogg_bytes);
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break;
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}
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Ok(n) => {
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total_bytes += n as u64;
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trace!("Read {} bytes from FLAC encoder (total: {})", n, total_bytes);
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frame_buffer.extend_from_slice(&read_buffer[..n]);
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// Broadcast to all clients (TODO: wrap in OGG pages)
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let bytes = Bytes::copy_from_slice(&buffer[..n]);
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// Wrap in OGG pages when we have enough data (target ~4KB per page)
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while frame_buffer.len() >= 4096 {
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let page_data = frame_buffer.drain(..4096.min(frame_buffer.len())).collect::<Vec<u8>>();
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let ogg_page = ogg_writer.create_page(&page_data, false, false, false);
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let ogg_bytes = Bytes::from(ogg_page);
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total_ogg_bytes += ogg_bytes.len() as u64;
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// Capture first chunk as header if it contains "fLaC"
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if !header_captured && bytes.len() >= 4 && &bytes[0..4] == b"fLaC" {
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*header_cache.write().await = Some(bytes.clone());
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header_captured = true;
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info!("FLAC header captured ({} bytes) - will be wrapped in OGG later", bytes.len());
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}
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if let Err(e) = broadcast_tx.send(bytes) {
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// No receivers, but that's okay - clients may not be connected yet
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trace!("No active receivers for OGG-FLAC broadcast: {}", e);
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if let Err(e) = broadcast_tx.send(ogg_bytes) {
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trace!("No active receivers for OGG-FLAC broadcast: {}", e);
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}
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}
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}
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Err(e) => {
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@@ -729,3 +769,184 @@ async fn broadcast_ogg_flac_stream(
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info!("OGG-FLAC broadcaster task completed successfully");
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Ok(())
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}
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/// Read FLAC header (fLaC + all metadata blocks until first frame)
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async fn read_flac_header(stream: &mut FlacEncodedStream) -> Result<Vec<u8>, AudioError> {
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let mut header = Vec::new();
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let mut buffer = [0u8; 4];
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// Read "fLaC" magic
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stream.read_exact(&mut buffer).await.map_err(|e| {
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AudioError::ProcessingError(format!("Failed to read FLAC magic: {}", e))
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})?;
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if &buffer != b"fLaC" {
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return Err(AudioError::ProcessingError("Invalid FLAC stream: missing fLaC magic".into()));
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}
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header.extend_from_slice(&buffer);
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// Read metadata blocks
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loop {
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// Read metadata block header (1 byte type + 3 bytes length)
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let mut block_header = [0u8; 4];
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stream.read_exact(&mut block_header).await.map_err(|e| {
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AudioError::ProcessingError(format!("Failed to read metadata block header: {}", e))
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})?;
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let is_last = (block_header[0] & 0x80) != 0;
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let block_length = u32::from_be_bytes([0, block_header[1], block_header[2], block_header[3]]) as usize;
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header.extend_from_slice(&block_header);
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// Read metadata block data
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let mut block_data = vec![0u8; block_length];
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stream.read_exact(&mut block_data).await.map_err(|e| {
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AudioError::ProcessingError(format!("Failed to read metadata block data: {}", e))
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})?;
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header.extend_from_slice(&block_data);
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if is_last {
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break;
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}
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}
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Ok(header)
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}
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/// Create empty Vorbis Comment block
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fn create_empty_vorbis_comment() -> Vec<u8> {
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let mut data = Vec::new();
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// Vendor string
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let vendor = "pmoaudio OGG-FLAC streamer";
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let vendor_bytes = vendor.as_bytes();
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data.extend_from_slice(&(vendor_bytes.len() as u32).to_le_bytes());
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data.extend_from_slice(vendor_bytes);
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// Number of comments (0 for now - metadata via /metadata endpoint)
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data.extend_from_slice(&0u32.to_le_bytes());
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data
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}
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/// OGG page writer (same as in pmoflac::ogg_flac_encoder)
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struct OggPageWriter {
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stream_serial: u32,
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page_sequence: u32,
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granule_position: u64,
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}
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impl OggPageWriter {
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fn new(stream_serial: u32) -> Self {
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Self {
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stream_serial,
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page_sequence: 0,
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granule_position: 0,
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}
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}
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fn create_page(&mut self, packet_data: &[u8], is_bos: bool, is_eos: bool, is_continuation: bool) -> Vec<u8> {
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use std::io::Write;
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let mut segments = Vec::new();
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let mut remaining = packet_data.len();
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// Segment the packet into 255-byte chunks
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while remaining > 0 {
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let segment_size = remaining.min(255);
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segments.push(segment_size as u8);
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remaining -= segment_size;
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}
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// If packet ends exactly on a 255-byte boundary, add empty segment
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if !packet_data.is_empty() && packet_data.len() % 255 == 0 && !is_continuation {
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segments.push(0);
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}
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let segment_count = segments.len();
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let header_size = 27 + segment_count;
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let total_size = header_size + packet_data.len();
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let mut page = Vec::with_capacity(total_size);
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// OGG page header
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page.write_all(b"OggS").unwrap();
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page.write_all(&[0]).unwrap(); // Version
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// Header type
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let mut header_type = 0u8;
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if is_continuation {
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header_type |= 0x01;
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}
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if is_bos {
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header_type |= 0x02;
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}
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if is_eos {
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header_type |= 0x04;
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}
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page.write_all(&[header_type]).unwrap();
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// Granule position
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page.write_all(&self.granule_position.to_le_bytes()).unwrap();
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// Stream serial number
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page.write_all(&self.stream_serial.to_le_bytes()).unwrap();
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// Page sequence number
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page.write_all(&self.page_sequence.to_le_bytes()).unwrap();
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self.page_sequence += 1;
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// CRC checksum (zero for now, calculated later)
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let crc_offset = page.len();
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page.write_all(&[0, 0, 0, 0]).unwrap();
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// Number of segments
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page.write_all(&[segment_count as u8]).unwrap();
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// Segment table
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page.write_all(&segments).unwrap();
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// Packet data
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page.write_all(packet_data).unwrap();
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// Calculate and insert CRC32
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let crc = calculate_ogg_crc(&page);
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page[crc_offset..crc_offset + 4].copy_from_slice(&crc.to_le_bytes());
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page
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}
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}
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/// Calculate OGG CRC32 checksum
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fn calculate_ogg_crc(data: &[u8]) -> u32 {
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const CRC_TABLE: [u32; 256] = generate_crc_table();
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let mut crc: u32 = 0;
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for &byte in data {
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crc = (crc << 8) ^ CRC_TABLE[((crc >> 24) ^ (byte as u32)) as usize];
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}
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crc
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}
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/// Generate CRC lookup table at compile time
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const fn generate_crc_table() -> [u32; 256] {
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let mut table = [0u32; 256];
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let mut i = 0;
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while i < 256 {
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let mut r = i << 24;
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let mut j = 0;
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while j < 8 {
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if (r & 0x80000000) != 0 {
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r = (r << 1) ^ 0x04c11db7;
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} else {
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r <<= 1;
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}
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j += 1;
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}
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table[i as usize] = r;
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i += 1;
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}
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table
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}
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@@ -23,6 +23,7 @@
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//!
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//! Then open in VLC:
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//! vlc http://localhost:8080/test/stream (pure FLAC)
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//! vlc http://localhost:8080/test/stream-ogg (OGG-FLAC streaming container)
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//! vlc http://localhost:8080/test/stream-icy (FLAC + ICY metadata)
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//!
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//! To check current metadata:
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@@ -35,7 +36,7 @@ use axum::{
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response::{IntoResponse, Response},
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};
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use pmoaudio::{AudioPipelineNode, TimerNode};
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use pmoaudio_ext::StreamingFlacSink;
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use pmoaudio_ext::{StreamingFlacSink, StreamingOggFlacSink};
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use pmoflac::EncoderOptions;
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use pmoparadise::{RadioParadiseClient, RadioParadiseStreamSource};
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use pmoserver::{ServerBuilder, init_logging};
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@@ -47,6 +48,7 @@ use tokio_util::sync::CancellationToken;
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/// Shared application state
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struct AppState {
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stream_handle: pmoaudio_ext::StreamHandle,
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ogg_handle: pmoaudio_ext::OggFlacStreamHandle,
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}
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/// Main HTTP handler for streaming (pure FLAC, no ICY metadata)
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@@ -89,6 +91,24 @@ async fn stream_icy_handler(
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.unwrap())
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}
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/// OGG-FLAC streaming handler
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async fn stream_ogg_handler(
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State(state): State<Arc<AppState>>,
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_headers: HeaderMap,
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) -> Result<Response, StatusCode> {
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tracing::info!("New client connected (OGG-FLAC mode)");
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// OGG-FLAC stream
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let ogg_stream = state.ogg_handle.subscribe();
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Ok(Response::builder()
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.status(StatusCode::OK)
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.header("Content-Type", "audio/ogg")
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.header("Cache-Control", "no-cache, no-store")
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.body(Body::from_stream(ReaderStream::new(ogg_stream)))
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.unwrap())
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}
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/// Metadata endpoint (JSON)
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async fn metadata_handler(State(state): State<Arc<AppState>>) -> impl IntoResponse {
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let metadata = state.stream_handle.get_metadata().await;
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@@ -122,6 +142,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
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eprintln!();
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eprintln!("After starting, open in VLC:");
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eprintln!(" vlc http://localhost:8080/test/stream (pure FLAC)");
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eprintln!(" vlc http://localhost:8080/test/stream-ogg (OGG-FLAC container)");
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eprintln!(" vlc http://localhost:8080/test/stream-icy (FLAC + ICY metadata)");
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std::process::exit(1);
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}
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@@ -167,34 +188,53 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
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tracing::info!("");
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// ═══════════════════════════════════════════════════════════════════════════
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// Create streaming pipeline
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// Create streaming pipelines (FLAC and OGG-FLAC)
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// ═══════════════════════════════════════════════════════════════════════════
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tracing::info!("Creating streaming pipeline...");
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tracing::info!("Creating streaming pipelines...");
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// Create Radio Paradise source
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let mut source = RadioParadiseStreamSource::new(client);
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source.push_block_id(block.event);
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tracing::debug!("RadioParadiseStreamSource created with block {}", block.event);
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// Create timer node for real-time pacing (3 seconds buffer)
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let mut timer = TimerNode::new(3.0);
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tracing::debug!("TimerNode created with 3.0s max lead time");
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// Create streaming FLAC sink
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// Encoder options (shared)
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let encoder_options = EncoderOptions {
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compression_level: 5,
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verify: false,
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..Default::default()
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};
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let (streaming_sink, stream_handle) = StreamingFlacSink::new(encoder_options, 16);
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// ─────────────────────────────────────────────────────────────────────────
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// Pipeline 1: FLAC streaming
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// ─────────────────────────────────────────────────────────────────────────
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let mut source_flac = RadioParadiseStreamSource::new(client.clone());
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source_flac.push_block_id(block.event);
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tracing::debug!("RadioParadiseStreamSource (FLAC) created with block {}", block.event);
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let mut timer_flac = TimerNode::new(3.0);
|
||||
tracing::debug!("TimerNode (FLAC) created with 3.0s max lead time");
|
||||
|
||||
let (streaming_sink, stream_handle) = StreamingFlacSink::new(encoder_options.clone(), 16);
|
||||
tracing::debug!("StreamingFlacSink created");
|
||||
|
||||
// Connect source → timer → sink
|
||||
timer.register(Box::new(streaming_sink));
|
||||
source.register(Box::new(timer));
|
||||
tracing::info!("Pipeline connected: RadioParadiseStreamSource → TimerNode → StreamingFlacSink");
|
||||
timer_flac.register(Box::new(streaming_sink));
|
||||
source_flac.register(Box::new(timer_flac));
|
||||
tracing::info!("Pipeline 1 connected: RadioParadiseStreamSource → TimerNode → StreamingFlacSink");
|
||||
|
||||
// ─────────────────────────────────────────────────────────────────────────
|
||||
// Pipeline 2: OGG-FLAC streaming
|
||||
// ─────────────────────────────────────────────────────────────────────────
|
||||
|
||||
let mut source_ogg = RadioParadiseStreamSource::new(client);
|
||||
source_ogg.push_block_id(block.event);
|
||||
tracing::debug!("RadioParadiseStreamSource (OGG) created with block {}", block.event);
|
||||
|
||||
let mut timer_ogg = TimerNode::new(3.0);
|
||||
tracing::debug!("TimerNode (OGG) created with 3.0s max lead time");
|
||||
|
||||
let (ogg_sink, ogg_handle) = StreamingOggFlacSink::new(encoder_options, 16);
|
||||
tracing::debug!("StreamingOggFlacSink created");
|
||||
|
||||
timer_ogg.register(Box::new(ogg_sink));
|
||||
source_ogg.register(Box::new(timer_ogg));
|
||||
tracing::info!("Pipeline 2 connected: RadioParadiseStreamSource → TimerNode → StreamingOggFlacSink");
|
||||
|
||||
// ═══════════════════════════════════════════════════════════════════════════
|
||||
// Setup pmoserver with streaming routes
|
||||
@@ -205,11 +245,15 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||
let mut server = ServerBuilder::new("RadioParadiseStreamTest", "http://localhost", 8080)
|
||||
.build();
|
||||
|
||||
let app_state = Arc::new(AppState { stream_handle });
|
||||
let app_state = Arc::new(AppState {
|
||||
stream_handle,
|
||||
ogg_handle,
|
||||
});
|
||||
|
||||
// Add streaming routes
|
||||
server.add_handler_with_state("/test/stream", stream_handler, app_state.clone()).await;
|
||||
server.add_handler_with_state("/test/stream-icy", stream_icy_handler, app_state.clone()).await;
|
||||
server.add_handler_with_state("/test/stream-ogg", stream_ogg_handler, app_state.clone()).await;
|
||||
|
||||
// Add metadata route
|
||||
server.add_handler_with_state("/test/metadata", metadata_handler, app_state.clone()).await;
|
||||
@@ -224,6 +268,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||
tracing::info!("Pure FLAC stream (for VLC, standard players):");
|
||||
tracing::info!(" vlc http://localhost:8080/test/stream");
|
||||
tracing::info!("");
|
||||
tracing::info!("OGG-FLAC stream (streaming container with metadata support):");
|
||||
tracing::info!(" vlc http://localhost:8080/test/stream-ogg");
|
||||
tracing::info!("");
|
||||
tracing::info!("FLAC + ICY metadata stream (for ICY-aware clients):");
|
||||
tracing::info!(" http://localhost:8080/test/stream-icy");
|
||||
tracing::info!("");
|
||||
@@ -233,19 +280,31 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||
tracing::info!("");
|
||||
|
||||
// ═══════════════════════════════════════════════════════════════════════════
|
||||
// Start pipeline and server
|
||||
// Start pipelines and server
|
||||
// ═══════════════════════════════════════════════════════════════════════════
|
||||
|
||||
let stop_token = CancellationToken::new();
|
||||
let stop_token_pipeline = stop_token.clone();
|
||||
let stop_token_flac = stop_token.clone();
|
||||
let stop_token_ogg = stop_token.clone();
|
||||
|
||||
// Start pipeline in background
|
||||
let pipeline_handle = tokio::spawn(async move {
|
||||
tracing::info!("[PIPELINE] Starting...");
|
||||
let result = Box::new(source).run(stop_token_pipeline).await;
|
||||
// Start FLAC pipeline in background
|
||||
let pipeline_flac_handle = tokio::spawn(async move {
|
||||
tracing::info!("[PIPELINE-FLAC] Starting...");
|
||||
let result = Box::new(source_flac).run(stop_token_flac).await;
|
||||
match &result {
|
||||
Ok(()) => tracing::info!("[PIPELINE] Completed successfully"),
|
||||
Err(e) => tracing::error!("[PIPELINE] Error: {}", e),
|
||||
Ok(()) => tracing::info!("[PIPELINE-FLAC] Completed successfully"),
|
||||
Err(e) => tracing::error!("[PIPELINE-FLAC] Error: {}", e),
|
||||
}
|
||||
result
|
||||
});
|
||||
|
||||
// Start OGG-FLAC pipeline in background
|
||||
let pipeline_ogg_handle = tokio::spawn(async move {
|
||||
tracing::info!("[PIPELINE-OGG] Starting...");
|
||||
let result = Box::new(source_ogg).run(stop_token_ogg).await;
|
||||
match &result {
|
||||
Ok(()) => tracing::info!("[PIPELINE-OGG] Completed successfully"),
|
||||
Err(e) => tracing::error!("[PIPELINE-OGG] Error: {}", e),
|
||||
}
|
||||
result
|
||||
});
|
||||
@@ -255,15 +314,21 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||
server.start().await;
|
||||
server.wait().await;
|
||||
|
||||
// Server stopped, cancel pipeline
|
||||
tracing::info!("Server stopped, canceling pipeline...");
|
||||
// Server stopped, cancel pipelines
|
||||
tracing::info!("Server stopped, canceling pipelines...");
|
||||
stop_token.cancel();
|
||||
|
||||
// Wait for pipeline to finish
|
||||
match pipeline_handle.await {
|
||||
Ok(Ok(())) => tracing::info!("Pipeline completed successfully"),
|
||||
Ok(Err(e)) => tracing::error!("Pipeline error: {}", e),
|
||||
Err(e) => tracing::error!("Pipeline task error: {}", e),
|
||||
// Wait for both pipelines to finish
|
||||
match pipeline_flac_handle.await {
|
||||
Ok(Ok(())) => tracing::info!("FLAC pipeline completed successfully"),
|
||||
Ok(Err(e)) => tracing::error!("FLAC pipeline error: {}", e),
|
||||
Err(e) => tracing::error!("FLAC pipeline task error: {}", e),
|
||||
}
|
||||
|
||||
match pipeline_ogg_handle.await {
|
||||
Ok(Ok(())) => tracing::info!("OGG-FLAC pipeline completed successfully"),
|
||||
Ok(Err(e)) => tracing::error!("OGG-FLAC pipeline error: {}", e),
|
||||
Err(e) => tracing::error!("OGG-FLAC pipeline task error: {}", e),
|
||||
}
|
||||
|
||||
tracing::info!("Shutdown complete");
|
||||
|
||||
Reference in New Issue
Block a user