some warning cleanup

server/src/video/encoder_thread.rs

@@ -1,8 +1,11 @@
 use anyhow::Context;
-use cudarc::{driver::{
+use cudarc::{
+    driver::{
         sys::{CUdeviceptr, CUmemorytype},
         CudaDevice, CudaSlice, DevicePtr, LaunchAsync,
-}, nvrtc::CompileOptions};
+    },
+    nvrtc::CompileOptions,
+};
 use letsplay_gpu::egl_helpers::DeviceContext;
 use std::{
     sync::{Arc, Mutex},
@@ -281,7 +284,10 @@ fn encoder_thread_hwframe_main(
     cuda_device.load_ptx(ptx, "module", &["flip_opengl"])?;
 
     let mut memcpy = cudarc::driver::sys::CUDA_MEMCPY2D_st::default();
-    // setup basic src stuff
+
+    // setup the things that won't change about the cuda memcpy
+
+    // src
     memcpy.srcXInBytes = 0;
     memcpy.srcY = 0;
     memcpy.srcMemoryType = CUmemorytype::CU_MEMORYTYPE_ARRAY;
@@ -291,12 +297,14 @@ fn encoder_thread_hwframe_main(
     memcpy.dstY = 0;
     memcpy.dstMemoryType = CUmemorytype::CU_MEMORYTYPE_DEVICE;
 
-    // Temporary buffer used for opengl flip on the GPU
+    // Temporary buffer used for opengl flip on the GPU. We copy to this buffer,
+    // then copy the flipped version (using the launched support kernel) to the CUDA device memory ffmpeg
+    // allocated.
     let mut temp_buffer: CudaSlice<u32> = cuda_device.alloc_zeros::<u32>(48).expect("over");
 
     loop {
-        match rx.try_recv() {
+        match rx.blocking_recv() {
-            Ok(msg) => match msg {
+            Some(msg) => match msg {
                 EncodeThreadInput::Init { size } => {
                     frame_number = 0;
 
@@ -318,9 +326,13 @@ fn encoder_thread_hwframe_main(
                 }
 
                 EncodeThreadInput::SendFrame => {
-                    // copy gl frame *ON THE GPU*
+                    // benchmarking
+                    //use std::time::Instant;
+                    //let start = Instant::now();
+
+                    // copy gl frame *ON THE GPU* to ffmpeg frame
                     {
-                        let mut gl_ctx = gl_context.lock().expect("you dumb fuck");
+                        let gl_ctx = gl_context.lock().expect("you dumb fuck");
                         let mut gl_resource =
                             cuda_resource.lock().expect("couldnt lock GL resource!");
 
@@ -351,11 +363,16 @@ fn encoder_thread_hwframe_main(
                             }
                         }
 
+                        // copy to the temporary buffer and synchronize
                         unsafe {
                             cudarc::driver::sys::lib()
                                 .cuMemcpy2DAsync_v2(&memcpy, std::ptr::null_mut())
                                 .result()
                                 .expect("cuMemcpy2D fail epic");
+
+                            cudarc::driver::sys::lib()
+                                .cuStreamSynchronize(std::ptr::null_mut())
+                                .result()?;
                         }
 
                         // launch kernel to flip the opengl framebuffer right-side up
@@ -369,9 +386,9 @@ fn encoder_thread_hwframe_main(
                                 shared_mem_bytes: 0,
                             };
 
-                            let flip_opengl = cuda_device
+                            let flip_opengl = cuda_device.get_func("module", "flip_opengl").expect(
-                                .get_func("module", "flip_opengl")
+                                "for some reason we couldn't get the support kenrel function",
-                                .expect("dumb fucker");
+                            );
 
                             unsafe {
                                 let frame_ptr = frame.as_mut_ptr();
@@ -381,23 +398,24 @@ fn encoder_thread_hwframe_main(
                                     (width * height) as usize * 4usize,
                                 );
 
-                                flip_opengl
+                                flip_opengl.launch(
-                                    .launch(
                                     launch_config,
                                     (&mut temp_buffer, &mut slice, width, height),
-                                    )
+                                )?;
-                                    .expect("I hate you");
 
+                                // leak so it doesn't free the memory
+                                // (the device pointer we convert into a slice is owned by ffmpeg, so we shouldn't be the ones
+                                //  trying to free it!)
+                                let _ = slice.leak();
+
+                                // Synchronize for the final time
                                 cudarc::driver::sys::lib()
                                     .cuStreamSynchronize(std::ptr::null_mut())
-                                    .result()
+                                    .result()?;
-                                    .expect("you banned");
-
-                                // leak so it doesnt free the memory like a dumbass
-                                let _ = slice.leak();
                             }
                         }
 
+                        // FIXME: ideally this would work on-drop but it doesn't.
                         mapped.unmap().expect("fuck you asshole");
                         gl_ctx.release();
                     }
@@ -416,16 +434,17 @@ fn encoder_thread_hwframe_main(
                     if force_keyframe {
                         force_keyframe = false;
                     }
+
+                    //tracing::info!("encoding frame {frame_number} took {:2?}", start.elapsed());
                 }
             },
 
-            Err(TryRecvError::Disconnected) => break,
+            None => break,
-            Err(TryRecvError::Empty) => {
-                std::thread::sleep(Duration::from_millis(1));
-            }
         }
     }
 
+    //std::thread::sleep(Duration::from_millis(1));
+
     Ok(())
 }
 

server/src/video/h264_encoder.rs

@@ -4,7 +4,7 @@ use anyhow::Context;
 use cudarc::driver::CudaDevice;
 use ffmpeg::error::EAGAIN;
 
-use ffmpeg::{codec as lavc, packet}; // lavc
+use ffmpeg::codec as lavc; // lavc
 
 use crate::types::Size;
 
@@ -129,7 +129,7 @@ impl H264Encoder {
         max_framerate: u32,
         bitrate: usize,
     ) -> anyhow::Result<Self> {
-        let (mut encoder, mut video_encoder_context) =
+        let (encoder, mut video_encoder_context) =
             create_context_and_set_common_parameters("h264_nvenc", &size, max_framerate, bitrate)
                 .with_context(|| "while trying to create encoder")?;
 
@@ -186,7 +186,7 @@ impl H264Encoder {
             .build()
             .with_context(|| "while trying to create CUDA frame context")?;
 
-        let (mut encoder, mut video_encoder_context) =
+        let (encoder, mut video_encoder_context) =
             create_context_and_set_common_parameters("h264_nvenc", &size, max_framerate, bitrate)
                 .with_context(|| "while trying to create encoder")?;
 
@@ -269,8 +269,6 @@ impl H264Encoder {
                     (*frame.as_mut_ptr()).height = encoder.height() as i32;
                     (*frame.as_mut_ptr()).hw_frames_ctx = hw_context.as_raw_mut();
 
-                    //ffmpeg::sys::av_frame_get_buffer(frame.as_mut_ptr(), 32);
-
                     hw_context.get_buffer(&mut frame)?;
                     hw_context.get_buffer(&mut frame)?;
 
@@ -280,13 +278,6 @@ impl H264Encoder {
                 }
             }
         }
-
-        /*
-
-
-        */
-
-        todo!("FIXME");
     }
 
     pub fn send_frame(&mut self, frame: &ffmpeg::Frame) {
@@ -296,16 +287,13 @@ impl H264Encoder {
             }
 
             Self::NvencSWFrame { encoder } => {
-                // Realistically this should be the same right?
                 encoder.send_frame(frame).unwrap();
-                //todo!("Requires support.");
             }
 
             Self::NvencHWFrame {
                 encoder,
-                hw_context,
+                hw_context: _,
             } => {
-                //todo!("Implement send_frame() for NvencHWFrame");
                 encoder.send_frame(frame).unwrap();
             }
         }
@@ -325,9 +313,9 @@ impl H264Encoder {
 
             Self::NvencHWFrame {
                 encoder,
-                hw_context,
+                hw_context: _,
             } => {
-                todo!("Implement send_eof() for NvencHWFrame");
+                encoder.send_eof().unwrap();
             }
         }
     }
@@ -336,11 +324,9 @@ impl H264Encoder {
         return match self {
             Self::Software { encoder } => encoder.receive_packet(packet),
             Self::NvencSWFrame { encoder } => encoder.receive_packet(packet),
-
-            // this might work?
             Self::NvencHWFrame {
                 encoder,
-                hw_context,
+                hw_context: _,
             } => encoder.receive_packet(packet),
         };
     }