playa 0.1.125

Image sequence player for VFX (EXR, PNG, JPEG, TIFF). Pure Rust with optional OpenEXR support.
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use crate::frame::{PixelBuffer, PixelFormat, FrameError};
use playa_ffmpeg as ffmpeg;
use std::path::Path;
use std::sync::Once;

static FFMPEG_LOG_INIT: Once = Once::new();

fn init_ffmpeg_logging() {
    FFMPEG_LOG_INIT.call_once(|| {
        unsafe {
            // Completely suppress all FFmpeg logging
            // AV_LOG_QUIET = -8 (silence all output including stderr)
            ffmpeg::ffi::av_log_set_level(ffmpeg::ffi::AV_LOG_QUIET);
        }
    });
}

pub struct VideoMetadata {
    pub frame_count: usize,
    pub width: u32,
    pub height: u32,
    #[allow(dead_code)]
    pub fps: f64,
}

impl VideoMetadata {
    pub fn from_file(path: &Path) -> Result<Self, FrameError> {
        init_ffmpeg_logging();

        let ictx = ffmpeg::format::input(path)
            .map_err(|e| FrameError::LoadError(format!("Failed to open video: {}", e)))?;

        let stream = ictx.streams()
            .best(ffmpeg::media::Type::Video)
            .ok_or_else(|| FrameError::LoadError("No video stream found".to_string()))?;

        let duration = stream.duration();
        let fps_rational = stream.avg_frame_rate();
        let time_base = stream.time_base();

        let duration_secs = duration as f64
            * time_base.numerator() as f64
            / time_base.denominator() as f64;
        let fps = fps_rational.numerator() as f64 / fps_rational.denominator() as f64;
        let frame_count = (duration_secs * fps) as usize;

        let codec_params = stream.parameters();
        let decoder_ctx = ffmpeg::codec::context::Context::from_parameters(codec_params)
            .map_err(|e| FrameError::LoadError(format!("Failed to create decoder context: {}", e)))?;
        let decoder = decoder_ctx.decoder().video()
            .map_err(|e| FrameError::LoadError(format!("Failed to create video decoder: {}", e)))?;

        Ok(VideoMetadata {
            frame_count,
            width: decoder.width(),
            height: decoder.height(),
            fps,
        })
    }
}

pub fn decode_frame(path: &Path, frame_num: usize) -> Result<(PixelBuffer, PixelFormat, usize, usize), FrameError> {
    init_ffmpeg_logging();

    let mut ictx = ffmpeg::format::input(path)
        .map_err(|e| FrameError::LoadError(format!("Failed to open video: {}", e)))?;

    let stream = ictx.streams()
        .best(ffmpeg::media::Type::Video)
        .ok_or_else(|| FrameError::LoadError("No video stream found".to_string()))?;
    let stream_idx = stream.index();

    let codec_params = stream.parameters();
    let decoder_ctx = ffmpeg::codec::context::Context::from_parameters(codec_params)
        .map_err(|e| FrameError::LoadError(format!("Failed to create decoder context: {}", e)))?;
    let mut decoder = decoder_ctx.decoder().video()
        .map_err(|e| FrameError::LoadError(format!("Failed to create video decoder: {}", e)))?;

    let width = decoder.width();
    let height = decoder.height();

    let mut scaler = ffmpeg::software::scaling::Context::get(
        decoder.format(),
        width,
        height,
        ffmpeg::format::Pixel::RGB24,
        width,
        height,
        ffmpeg::software::scaling::Flags::BILINEAR,
    ).map_err(|e| FrameError::LoadError(format!("Failed to create scaler: {}", e)))?;

    let mut current_frame = 0;

    for (stream, packet) in ictx.packets() {
        if stream.index() == stream_idx {
            decoder.send_packet(&packet)
                .map_err(|e| FrameError::LoadError(format!("Failed to send packet: {}", e)))?;

            let mut decoded = ffmpeg::util::frame::video::Video::empty();
            while decoder.receive_frame(&mut decoded).is_ok() {
                if current_frame == frame_num {
                    let mut rgb_frame = ffmpeg::util::frame::video::Video::empty();
                    scaler.run(&decoded, &mut rgb_frame)
                        .map_err(|e| FrameError::LoadError(format!("Failed to scale frame: {}", e)))?;

                    let rgb_data = rgb_frame.data(0);
                    let stride = rgb_frame.stride(0);

                    let mut rgba_data = vec![0u8; (width * height * 4) as usize];
                    for y in 0..height {
                        for x in 0..width {
                            let src_idx = (y * stride as u32 + x * 3) as usize;
                            let dst_idx = (y * width + x) as usize * 4;

                            rgba_data[dst_idx] = rgb_data[src_idx];         // R
                            rgba_data[dst_idx + 1] = rgb_data[src_idx + 1]; // G
                            rgba_data[dst_idx + 2] = rgb_data[src_idx + 2]; // B
                            rgba_data[dst_idx + 3] = 255;                   // A
                        }
                    }

                    return Ok((
                        PixelBuffer::U8(rgba_data),
                        PixelFormat::Rgba8,
                        width as usize,
                        height as usize,
                    ));
                }
                current_frame += 1;
            }
        }
    }

    Err(FrameError::LoadError(format!("Frame {} not found in video", frame_num)))
}