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if let Ok(mut ictx) = input(&Path::new("input")) { + + let input = ictx + .streams() + .best(Type::Video) + .ok_or(ffmpeg::Error::StreamNotFound)?; + let video_stream_index = input.index(); + + let context_decoder = ffmpeg::codec::context::Context::from_parameters(input.parameters())?; + // Ctx's video decoder + let mut decoder = context_decoder.decoder().video()?; + let mut scaler = Context::get( + decoder.format(), + decoder.width(), + decoder.height(), + Pixel::RGB24, + decoder.width(), + decoder.height(), + Flags::BILINEAR, + )?; + + // closure + let mut receive_and_process_decoded_frames = |decoder: &mut ffmpeg::decoder::Video| -> Result<(), Error> { + // get empty frame + let mut decoded = Video::empty(); + // recieve next frame into decoded + while decoder.receive_frame(&mut decoded).is_ok() { + // get another empty frame + let mut rgb_frame = Video::empty(); + // scale image? Not sure what this does bit it doesn't work without it. + scaler.run(&decoded, &mut rgb_frame)?; + + // test::print_raw(&rgb_frame.data(0)); + // test::print_square(&rgb_frame.data(0), rgb_frame.width() as usize); + test::print_square(&rgb_frame); + // test::small_matrix(); + } + Ok(()) + }; + + for (stream, packet) in ictx.packets() { + // else what? + // Is this for multiple video streams? + if stream.index() == video_stream_index { + decoder.send_packet(&packet)?; + receive_and_process_decoded_frames(&mut decoder)?; + } + } + decoder.send_eof()?; + receive_and_process_decoded_frames(&mut decoder)?; + } + + Ok(()) +} + diff --git a/src/test.rs b/src/test.rs new file mode 100644 index 0000000..f92f074 --- /dev/null +++ b/src/test.rs @@ -0,0 +1,62 @@ +use std::io::*; +use ffmpeg::format::Pixel; +use rand::Rng; + + +pub fn small_matrix() { + let mut matrix = [0u8; 432]; // 144 * 3 = 432 + let mut rng = rand::thread_rng(); + let r = rng.gen_range(0..50); + let g = rng.gen_range(0..50); + let b = rng.gen_range(0..50); + + matrix.iter_mut().enumerate().for_each(|f| { + let value = match f.0 % 3 { + 0 => r, + 1 => g, + _ => b, + }; + + *f.1 = value; + }); + + print_raw(&matrix); +} + +#[inline] +/// Asuumes a square ig +pub fn print_raw(buf: &[u8]) { + let mut stdout = stdout(); + let mut lock = stdout.lock(); + lock.write(buf).unwrap(); + stdout.flush().unwrap(); +} + +/// Must use square images +// pub fn print_square(buf: &[u8], width_hight: usize, line) { +pub fn print_square(frame: &ffmpeg::frame::Video) { + if frame.format() != Pixel::RGB24 { panic!("Must use Pixel::RGB24"); } + if frame.width() != frame.height() { panic!("Must be square frames"); } + + let buf = frame.data(0); + let size = frame.width() as usize; + // How many bytes per pixel RGBA + // frame.as_ptr(); + let step = size*4; + // (Assuming square) Step thru buffer. + for i in 0..size*2 { + let j = i*step; + // Slices non-inclusively, ie: Even though j(n)+step = j(n+1) the ranges don't overlap. It take from..until + let pre_slice = &buf[j..j+step]; + // Remove the last 12 bytes, alpha? + let slice = &pre_slice[0..size*3]; + // let lol = &buf[j..j+step][0..size*3]; + + // Skip odd lines (they are filled with zeros) + if i & 1 != 1 { + // debug + println!("{:?} || {}-{}", slice, j, j+step); + } + } +} +