678 lines
26 KiB
Rust
678 lines
26 KiB
Rust
//! Video decoding and management for Lightningbeam
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//!
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//! This module provides FFmpeg-based video decoding with LRU frame caching
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//! for efficient video playback and preview.
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use std::sync::{Arc, Mutex};
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use std::num::NonZeroUsize;
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use std::collections::HashMap;
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use ffmpeg_next as ffmpeg;
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use lru::LruCache;
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use uuid::Uuid;
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/// Metadata about a video file
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#[derive(Debug, Clone)]
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pub struct VideoMetadata {
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pub width: u32,
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pub height: u32,
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pub fps: f64,
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pub duration: f64,
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pub has_audio: bool,
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}
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/// Video decoder with LRU frame caching
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pub struct VideoDecoder {
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path: String,
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_width: u32, // Original video width
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_height: u32, // Original video height
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output_width: u32, // Scaled output width
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output_height: u32, // Scaled output height
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fps: f64,
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_duration: f64,
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time_base: f64,
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stream_index: usize,
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frame_cache: LruCache<i64, Vec<u8>>, // timestamp -> RGBA data
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input: Option<ffmpeg::format::context::Input>,
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decoder: Option<ffmpeg::decoder::Video>,
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last_decoded_ts: i64, // Track the last decoded frame timestamp
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keyframe_positions: Vec<i64>, // Index of keyframe timestamps for fast seeking
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}
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impl VideoDecoder {
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/// Create a new video decoder
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///
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/// `max_width` and `max_height` specify the maximum output dimensions.
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/// Video will be scaled down if larger, preserving aspect ratio.
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/// `build_keyframes` controls whether to build the keyframe index immediately (slow)
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/// or defer it for async building later.
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fn new(path: String, cache_size: usize, max_width: Option<u32>, max_height: Option<u32>, build_keyframes: bool) -> Result<Self, String> {
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ffmpeg::init().map_err(|e| e.to_string())?;
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let input = ffmpeg::format::input(&path)
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.map_err(|e| format!("Failed to open video: {}", e))?;
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let video_stream = input.streams()
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.best(ffmpeg::media::Type::Video)
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.ok_or("No video stream found")?;
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let stream_index = video_stream.index();
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let context_decoder = ffmpeg::codec::context::Context::from_parameters(
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video_stream.parameters()
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).map_err(|e| e.to_string())?;
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let decoder = context_decoder.decoder().video()
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.map_err(|e| e.to_string())?;
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let width = decoder.width();
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let height = decoder.height();
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let time_base = f64::from(video_stream.time_base());
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// Calculate output dimensions (scale down if larger than max)
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let (output_width, output_height) = if let (Some(max_w), Some(max_h)) = (max_width, max_height) {
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// Calculate scale to fit within max dimensions while preserving aspect ratio
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let scale = (max_w as f32 / width as f32).min(max_h as f32 / height as f32).min(1.0);
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((width as f32 * scale) as u32, (height as f32 * scale) as u32)
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} else {
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(width, height)
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};
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// Try to get duration from stream, fallback to container
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let duration = if video_stream.duration() > 0 {
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video_stream.duration() as f64 * time_base
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} else if input.duration() > 0 {
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input.duration() as f64 / f64::from(ffmpeg::ffi::AV_TIME_BASE)
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} else {
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// If no duration available, estimate from frame count and fps
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let fps = f64::from(video_stream.avg_frame_rate());
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if video_stream.frames() > 0 && fps > 0.0 {
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video_stream.frames() as f64 / fps
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} else {
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0.0 // Unknown duration
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}
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};
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let fps = f64::from(video_stream.avg_frame_rate());
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// Optionally build keyframe index for fast seeking
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let keyframe_positions = if build_keyframes {
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eprintln!("[Video Decoder] Building keyframe index for {}", path);
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let positions = Self::scan_keyframes(&path, stream_index)?;
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eprintln!("[Video Decoder] Found {} keyframes", positions.len());
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positions
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} else {
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eprintln!("[Video Decoder] Deferring keyframe index building for {}", path);
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Vec::new()
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};
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Ok(Self {
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path,
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_width: width,
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_height: height,
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output_width,
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output_height,
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fps,
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_duration: duration,
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time_base,
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stream_index,
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frame_cache: LruCache::new(
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NonZeroUsize::new(cache_size).unwrap()
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),
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input: None,
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decoder: None,
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last_decoded_ts: -1,
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keyframe_positions,
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})
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}
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/// Source file path this decoder reads from.
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pub fn path(&self) -> &str {
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&self.path
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}
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/// Parameters needed to scan keyframes off-thread (path + video stream index).
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pub fn keyframe_scan_params(&self) -> (String, usize) {
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(self.path.clone(), self.stream_index)
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}
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/// Replace the keyframe index (built off-thread via [`VideoDecoder::scan_keyframes`]).
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pub fn set_keyframe_index(&mut self, positions: Vec<i64>) {
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self.keyframe_positions = positions;
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}
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/// Get the output width (scaled dimensions)
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pub fn get_output_width(&self) -> u32 {
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self.output_width
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}
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/// Get the output height (scaled dimensions)
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pub fn get_output_height(&self) -> u32 {
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self.output_height
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}
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/// Decode a frame at the specified timestamp (public wrapper)
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pub fn decode_frame(&mut self, timestamp: f64) -> Result<Vec<u8>, String> {
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self.get_frame(timestamp)
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}
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/// Build an index of all keyframe positions in the video by scanning packets
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/// from a fresh input. Does not touch `self` — call it off-thread (it is slow
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/// on long videos) and hand the result to [`VideoDecoder::set_keyframe_index`].
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pub fn scan_keyframes(path: &str, stream_index: usize) -> Result<Vec<i64>, String> {
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let mut input = ffmpeg::format::input(path)
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.map_err(|e| format!("Failed to open video for indexing: {}", e))?;
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let mut keyframes = Vec::new();
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// Scan through all packets to find keyframes
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for (stream, packet) in input.packets() {
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if stream.index() == stream_index {
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// Check if this packet is a keyframe
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if packet.is_key() {
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if let Some(pts) = packet.pts() {
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keyframes.push(pts);
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}
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}
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}
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}
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// Ensure keyframes are sorted (they should be already)
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keyframes.sort_unstable();
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Ok(keyframes)
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}
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/// Find the nearest keyframe at or before the target timestamp
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/// Returns the keyframe timestamp, or 0 if target is before first keyframe
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fn find_nearest_keyframe_before(&self, target_ts: i64) -> i64 {
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// Binary search to find the largest keyframe <= target_ts
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match self.keyframe_positions.binary_search(&target_ts) {
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Ok(idx) => self.keyframe_positions[idx], // Exact match
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Err(0) => 0, // Target is before first keyframe, seek to start
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Err(idx) => self.keyframe_positions[idx - 1], // Use previous keyframe
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}
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}
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/// Get a decoded frame at the specified timestamp
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fn get_frame(&mut self, timestamp: f64) -> Result<Vec<u8>, String> {
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use std::time::Instant;
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let t_start = Instant::now();
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// Round timestamp to nearest frame boundary to improve cache hits
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// This ensures that timestamps like 1.0001s and 0.9999s both map to frame 1.0s
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let frame_duration = 1.0 / self.fps;
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let rounded_timestamp = (timestamp / frame_duration).round() * frame_duration;
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// Convert timestamp to frame timestamp
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let frame_ts = (rounded_timestamp / self.time_base) as i64;
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// Check cache
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if let Some(cached_frame) = self.frame_cache.get(&frame_ts) {
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eprintln!("[Video Timing] Cache hit for ts={:.3}s ({}ms)", timestamp, t_start.elapsed().as_millis());
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return Ok(cached_frame.clone());
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}
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// Determine if we need to seek
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// Seek if: no decoder open, going backwards, or jumping forward more than 2 seconds
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let need_seek = self.decoder.is_none()
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|| frame_ts < self.last_decoded_ts
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|| frame_ts > self.last_decoded_ts + (2.0 / self.time_base) as i64;
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if need_seek {
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let t_seek_start = Instant::now();
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// Find the nearest keyframe at or before our target using the index
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// This is the exact keyframe position, so we can seek directly to it
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let keyframe_ts_stream = self.find_nearest_keyframe_before(frame_ts);
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// Convert from stream timebase to AV_TIME_BASE (microseconds) for container-level seek
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// input.seek() with stream=-1 expects AV_TIME_BASE units, not stream units
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let keyframe_seconds = keyframe_ts_stream as f64 * self.time_base;
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let keyframe_ts_av = (keyframe_seconds * 1_000_000.0) as i64; // AV_TIME_BASE = 1000000
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eprintln!("[Video Seek] Target: {} | Keyframe(stream): {} | Keyframe(AV): {} | Index size: {}",
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frame_ts, keyframe_ts_stream, keyframe_ts_av, self.keyframe_positions.len());
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// Reopen input
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let mut input = ffmpeg::format::input(&self.path)
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.map_err(|e| format!("Failed to reopen video: {}", e))?;
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// Seek directly to the keyframe with a 1-unit window
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// Can't use keyframe_ts..keyframe_ts (empty) or ..= (not supported)
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input.seek(keyframe_ts_av, keyframe_ts_av..(keyframe_ts_av + 1))
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.map_err(|e| format!("Seek failed: {}", e))?;
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eprintln!("[Video Timing] Seek call took {}ms", t_seek_start.elapsed().as_millis());
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let context_decoder = ffmpeg::codec::context::Context::from_parameters(
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input.streams().best(ffmpeg::media::Type::Video).unwrap().parameters()
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).map_err(|e| e.to_string())?;
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let decoder = context_decoder.decoder().video()
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.map_err(|e| e.to_string())?;
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self.input = Some(input);
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self.decoder = Some(decoder);
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// Set last_decoded_ts to just before the seek target so forward playback works
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// Without this, every frame would trigger a new seek
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self.last_decoded_ts = frame_ts - 1;
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}
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let input = self.input.as_mut().unwrap();
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let decoder = self.decoder.as_mut().unwrap();
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// Decode frames until we find the one closest to our target timestamp
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let mut best_frame_data: Option<Vec<u8>> = None;
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let mut best_frame_ts: Option<i64> = None;
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let t_decode_start = Instant::now();
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let mut decode_count = 0;
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let mut scale_time_ms = 0u128;
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for (stream, packet) in input.packets() {
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if stream.index() == self.stream_index {
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decoder.send_packet(&packet)
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.map_err(|e| e.to_string())?;
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let mut frame = ffmpeg::util::frame::Video::empty();
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while decoder.receive_frame(&mut frame).is_ok() {
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decode_count += 1;
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let current_frame_ts = frame.timestamp().unwrap_or(0);
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self.last_decoded_ts = current_frame_ts; // Update last decoded position
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// Check if this frame is closer to our target than the previous best
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let is_better = match best_frame_ts {
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None => true,
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Some(best_ts) => {
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(current_frame_ts - frame_ts).abs() < (best_ts - frame_ts).abs()
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}
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};
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if is_better {
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let t_scale_start = Instant::now();
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// Convert to RGBA and scale to output size
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let mut scaler = ffmpeg::software::scaling::context::Context::get(
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frame.format(),
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frame.width(),
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frame.height(),
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ffmpeg::format::Pixel::RGBA,
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self.output_width,
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self.output_height,
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ffmpeg::software::scaling::flag::Flags::BILINEAR,
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).map_err(|e| e.to_string())?;
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let mut rgb_frame = ffmpeg::util::frame::Video::empty();
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scaler.run(&frame, &mut rgb_frame)
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.map_err(|e| e.to_string())?;
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// Remove stride padding to create tightly packed RGBA data
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let width = self.output_width as usize;
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let height = self.output_height as usize;
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let stride = rgb_frame.stride(0);
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let row_size = width * 4; // RGBA = 4 bytes per pixel
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let source_data = rgb_frame.data(0);
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let mut packed_data = Vec::with_capacity(row_size * height);
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for y in 0..height {
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let row_start = y * stride;
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let row_end = row_start + row_size;
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packed_data.extend_from_slice(&source_data[row_start..row_end]);
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}
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scale_time_ms += t_scale_start.elapsed().as_millis();
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best_frame_data = Some(packed_data);
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best_frame_ts = Some(current_frame_ts);
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}
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// If we've reached or passed the target timestamp, we can stop
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if current_frame_ts >= frame_ts {
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// Found our frame, cache and return it
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if let Some(data) = best_frame_data {
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let total_time = t_start.elapsed().as_millis();
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let decode_time = t_decode_start.elapsed().as_millis();
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eprintln!("[Video Timing] ts={:.3}s | Decoded {} frames in {}ms | Scale: {}ms | Total: {}ms",
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timestamp, decode_count, decode_time, scale_time_ms, total_time);
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self.frame_cache.put(frame_ts, data.clone());
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return Ok(data);
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}
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break;
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}
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}
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}
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}
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eprintln!("[Video Decoder] ERROR: Failed to decode frame for timestamp {}", timestamp);
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Err("Failed to decode frame".to_string())
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}
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}
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/// Generate timeline thumbnails for a video using a **dedicated** decoder that
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/// is independent of any shared playback decoder — so thumbnail work never holds
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/// a lock the UI/playback needs.
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///
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/// Thumbnails are sampled at keyframes ~`interval_secs` apart. Decoding at a
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/// keyframe is cheap (≈one frame) versus decoding forward to an arbitrary
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/// timestamp (the whole GOP). Frames are decoded directly at `thumb_width` (so
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/// `get_thumbnail_at`'s 128-wide assumption holds) and tightly packed RGBA is
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/// handed to `on_thumb` as `(timestamp_secs, data)`.
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pub fn generate_keyframe_thumbnails(
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path: &str,
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interval_secs: f64,
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thumb_width: u32,
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mut on_thumb: impl FnMut(f64, Arc<Vec<u8>>),
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) -> Result<(), String> {
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// Own decoder at thumbnail resolution; builds its own keyframe index. The
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// large max-height lets width be the constraining dimension, so output width
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// is exactly `thumb_width`.
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let mut decoder = VideoDecoder::new(
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path.to_string(),
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4,
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Some(thumb_width),
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Some(100_000),
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true, // build keyframe index (needed to sample at keyframes)
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)?;
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let keyframe_secs: Vec<f64> = decoder
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.keyframe_positions
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.iter()
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.map(|&ts| ts as f64 * decoder.time_base)
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.collect();
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let mut last_emitted = f64::NEG_INFINITY;
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for ks in keyframe_secs {
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if ks - last_emitted < interval_secs {
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continue;
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}
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if let Ok(rgba) = decoder.get_frame(ks) {
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last_emitted = ks;
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on_thumb(ks, Arc::new(rgba));
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}
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}
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Ok(())
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}
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/// Probe video file for metadata without creating a full decoder
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pub fn probe_video(path: &str) -> Result<VideoMetadata, String> {
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ffmpeg::init().map_err(|e| e.to_string())?;
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let input = ffmpeg::format::input(path)
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.map_err(|e| format!("Failed to open video: {}", e))?;
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let video_stream = input.streams()
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.best(ffmpeg::media::Type::Video)
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.ok_or("No video stream found")?;
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let context_decoder = ffmpeg::codec::context::Context::from_parameters(
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video_stream.parameters()
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).map_err(|e| e.to_string())?;
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let decoder = context_decoder.decoder().video()
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.map_err(|e| e.to_string())?;
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let width = decoder.width();
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let height = decoder.height();
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let time_base = f64::from(video_stream.time_base());
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// Try to get duration from stream, fallback to container
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let duration = if video_stream.duration() > 0 {
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video_stream.duration() as f64 * time_base
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} else if input.duration() > 0 {
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input.duration() as f64 / f64::from(ffmpeg::ffi::AV_TIME_BASE)
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} else {
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// If no duration available, estimate from frame count and fps
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let fps = f64::from(video_stream.avg_frame_rate());
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if video_stream.frames() > 0 && fps > 0.0 {
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video_stream.frames() as f64 / fps
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} else {
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0.0 // Unknown duration
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}
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};
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let fps = f64::from(video_stream.avg_frame_rate());
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// Check for audio stream
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let has_audio = input.streams()
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.best(ffmpeg::media::Type::Audio)
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.is_some();
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Ok(VideoMetadata {
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width,
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height,
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fps,
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duration,
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has_audio,
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})
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}
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/// A single decoded video frame with RGBA data
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#[derive(Debug, Clone)]
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pub struct VideoFrame {
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pub width: u32,
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pub height: u32,
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pub rgba_data: Arc<Vec<u8>>,
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pub timestamp: f64,
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}
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/// Manages video decoders and frame caching for multiple video clips
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pub struct VideoManager {
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/// Pool of video decoders, one per clip
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decoders: HashMap<Uuid, Arc<Mutex<VideoDecoder>>>,
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/// Frame cache: (clip_id, timestamp_ms) -> frame. Stores decoded RGBA for
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/// zero-copy rendering. Bounded by a **byte budget** (not a frame count, which
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/// would be unsafe across resolutions — a 4K frame is ~33MB vs ~2MB at 800x600)
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/// so playback of arbitrarily long video never grows unbounded.
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frame_cache: LruCache<(Uuid, i64), Arc<VideoFrame>>,
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/// Running total of bytes held in `frame_cache` (sum of each frame's RGBA len),
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/// kept in sync on insert/evict/remove so eviction is O(1) per frame.
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frame_cache_bytes: usize,
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/// Thumbnail cache: clip_id -> Vec of (timestamp, rgba_data)
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/// Low-resolution (64px width) thumbnails for scrubbing
|
|
thumbnail_cache: HashMap<Uuid, Vec<(f64, Arc<Vec<u8>>)>>,
|
|
|
|
/// Maximum number of frames to cache per decoder
|
|
cache_size: usize,
|
|
}
|
|
|
|
/// Byte budget for [`VideoManager::frame_cache`] (decoded full-resolution frames).
|
|
/// At ~2MB/frame (800x600) this holds ~128 frames; at ~33MB/frame (4K) ~8 — in
|
|
/// both cases enough for the current frame plus a scrub window, while bounding RAM.
|
|
const FRAME_CACHE_BYTE_BUDGET: usize = 256 * 1024 * 1024;
|
|
|
|
impl VideoManager {
|
|
/// Create a new video manager with default cache size
|
|
pub fn new() -> Self {
|
|
Self::with_cache_size(20)
|
|
}
|
|
|
|
/// Create a new video manager with specified cache size
|
|
pub fn with_cache_size(cache_size: usize) -> Self {
|
|
Self {
|
|
decoders: HashMap::new(),
|
|
frame_cache: LruCache::unbounded(),
|
|
frame_cache_bytes: 0,
|
|
thumbnail_cache: HashMap::new(),
|
|
cache_size,
|
|
}
|
|
}
|
|
|
|
/// Load a video file and create a decoder for it
|
|
///
|
|
/// `target_width` and `target_height` specify the maximum dimensions
|
|
/// for decoded frames. Video will be scaled down if larger.
|
|
///
|
|
/// The keyframe index is NOT built during this call — scan it off-thread via
|
|
/// [`VideoDecoder::scan_keyframes`] and store it with
|
|
/// [`VideoDecoder::set_keyframe_index`] so the slow scan never blocks playback.
|
|
pub fn load_video(
|
|
&mut self,
|
|
clip_id: Uuid,
|
|
path: String,
|
|
target_width: u32,
|
|
target_height: u32,
|
|
) -> Result<VideoMetadata, String> {
|
|
// First probe the video for metadata
|
|
let metadata = probe_video(&path)?;
|
|
|
|
// Create decoder with target dimensions, without building keyframe index
|
|
let decoder = VideoDecoder::new(
|
|
path,
|
|
self.cache_size,
|
|
Some(target_width),
|
|
Some(target_height),
|
|
false, // Don't build keyframe index synchronously
|
|
)?;
|
|
|
|
// Store decoder in pool
|
|
self.decoders.insert(clip_id, Arc::new(Mutex::new(decoder)));
|
|
|
|
Ok(metadata)
|
|
}
|
|
|
|
/// Get a decoded frame for a specific clip at a specific timestamp
|
|
///
|
|
/// Returns None if the clip is not loaded or decoding fails.
|
|
/// Frames are cached for performance.
|
|
pub fn get_frame(&mut self, clip_id: &Uuid, timestamp: f64) -> Option<Arc<VideoFrame>> {
|
|
// Convert timestamp to milliseconds for cache key
|
|
let timestamp_ms = (timestamp * 1000.0) as i64;
|
|
let cache_key = (*clip_id, timestamp_ms);
|
|
|
|
// Check frame cache first
|
|
if let Some(cached_frame) = self.frame_cache.get(&cache_key) {
|
|
return Some(Arc::clone(cached_frame));
|
|
}
|
|
|
|
// Get decoder for this clip. Clone the Arc so we don't hold a borrow of
|
|
// `self.decoders` across the `&mut self` cache insert below.
|
|
let decoder_arc = Arc::clone(self.decoders.get(clip_id)?);
|
|
let mut decoder = decoder_arc.lock().ok()?;
|
|
|
|
// Decode the frame
|
|
let rgba_data = decoder.get_frame(timestamp).ok()?;
|
|
let width = decoder.output_width;
|
|
let height = decoder.output_height;
|
|
drop(decoder); // release the lock before touching `self`
|
|
|
|
// Create VideoFrame and cache it
|
|
let frame = Arc::new(VideoFrame {
|
|
width,
|
|
height,
|
|
rgba_data: Arc::new(rgba_data),
|
|
timestamp,
|
|
});
|
|
|
|
self.cache_frame(cache_key, Arc::clone(&frame));
|
|
|
|
Some(frame)
|
|
}
|
|
|
|
/// Insert a frame into the byte-budgeted cache, evicting least-recently-used
|
|
/// frames until the total is within [`FRAME_CACHE_BYTE_BUDGET`].
|
|
fn cache_frame(&mut self, key: (Uuid, i64), frame: Arc<VideoFrame>) {
|
|
let bytes = frame.rgba_data.len();
|
|
if let Some(old) = self.frame_cache.put(key, frame) {
|
|
self.frame_cache_bytes = self.frame_cache_bytes.saturating_sub(old.rgba_data.len());
|
|
}
|
|
self.frame_cache_bytes += bytes;
|
|
// Keep at least one frame resident even if it alone exceeds the budget.
|
|
while self.frame_cache_bytes > FRAME_CACHE_BYTE_BUDGET && self.frame_cache.len() > 1 {
|
|
if let Some((_, evicted)) = self.frame_cache.pop_lru() {
|
|
self.frame_cache_bytes = self.frame_cache_bytes.saturating_sub(evicted.rgba_data.len());
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Get the decoder Arc for a clip (for external thumbnail generation)
|
|
/// This allows external code to decode frames without holding the VideoManager lock
|
|
pub fn get_decoder(&self, clip_id: &Uuid) -> Option<Arc<Mutex<VideoDecoder>>> {
|
|
self.decoders.get(clip_id).cloned()
|
|
}
|
|
|
|
/// Insert a thumbnail into the cache (for external thumbnail generation)
|
|
pub fn insert_thumbnail(&mut self, clip_id: &Uuid, timestamp: f64, data: Arc<Vec<u8>>) {
|
|
self.thumbnail_cache
|
|
.entry(*clip_id)
|
|
.or_insert_with(Vec::new)
|
|
.push((timestamp, data));
|
|
}
|
|
|
|
/// Get the thumbnail closest to the specified timestamp
|
|
///
|
|
/// Returns None if no thumbnails have been generated for this clip.
|
|
pub fn get_thumbnail_at(&self, clip_id: &Uuid, timestamp: f64) -> Option<(u32, u32, Arc<Vec<u8>>)> {
|
|
let thumbnails = self.thumbnail_cache.get(clip_id)?;
|
|
|
|
if thumbnails.is_empty() {
|
|
return None;
|
|
}
|
|
|
|
// Binary search for closest thumbnail
|
|
let idx = thumbnails.binary_search_by(|(t, _)| {
|
|
t.partial_cmp(×tamp).unwrap_or(std::cmp::Ordering::Equal)
|
|
}).unwrap_or_else(|idx| {
|
|
// If exact match not found, pick the closest
|
|
if idx == 0 {
|
|
0
|
|
} else if idx >= thumbnails.len() {
|
|
thumbnails.len() - 1
|
|
} else {
|
|
// Compare distance to previous and next
|
|
let prev_dist = (thumbnails[idx - 1].0 - timestamp).abs();
|
|
let next_dist = (thumbnails[idx].0 - timestamp).abs();
|
|
if prev_dist < next_dist {
|
|
idx - 1
|
|
} else {
|
|
idx
|
|
}
|
|
}
|
|
});
|
|
|
|
let (_, rgba_data) = &thumbnails[idx];
|
|
|
|
// Return (width, height, data)
|
|
// Thumbnails are always 128px width
|
|
let thumb_width = 128;
|
|
let thumb_height = (rgba_data.len() / (thumb_width * 4)) as u32;
|
|
|
|
Some((thumb_width as u32, thumb_height, Arc::clone(rgba_data)))
|
|
}
|
|
|
|
/// Remove a video clip and its cached data
|
|
pub fn unload_video(&mut self, clip_id: &Uuid) {
|
|
self.decoders.remove(clip_id);
|
|
|
|
// Remove all cached frames for this clip (LruCache has no retain; collect
|
|
// matching keys, then pop each, keeping the byte total in sync).
|
|
let keys: Vec<(Uuid, i64)> = self
|
|
.frame_cache
|
|
.iter()
|
|
.filter(|((id, _), _)| id == clip_id)
|
|
.map(|(k, _)| *k)
|
|
.collect();
|
|
for key in keys {
|
|
if let Some(frame) = self.frame_cache.pop(&key) {
|
|
self.frame_cache_bytes = self.frame_cache_bytes.saturating_sub(frame.rgba_data.len());
|
|
}
|
|
}
|
|
|
|
// Remove thumbnails
|
|
self.thumbnail_cache.remove(clip_id);
|
|
}
|
|
|
|
/// Clear all frame caches (useful for memory management)
|
|
pub fn clear_frame_cache(&mut self) {
|
|
self.frame_cache.clear();
|
|
self.frame_cache_bytes = 0;
|
|
}
|
|
}
|
|
|
|
impl Default for VideoManager {
|
|
fn default() -> Self {
|
|
Self::new()
|
|
}
|
|
}
|