Merge branch 'mjpeg'

[nageru] / nageru / mjpeg_encoder.h

diff --git a/nageru/mjpeg_encoder.h b/nageru/mjpeg_encoder.h
new file mode 100644 (file)
index 0000000..3ce3439
--- /dev/null
+++ b/nageru/mjpeg_encoder.h
@@ -0,0 +1,121 @@
+#ifndef _MJPEG_ENCODER_H
+#define _MJPEG_ENCODER_H 1
+
+#include "shared/ffmpeg_raii.h"
+#include "ref_counted_frame.h"
+
+extern "C" {
+
+#include <libavformat/avio.h>
+
+}  // extern "C"
+
+#include <atomic>
+#include <bmusb/bmusb.h>
+#include <condition_variable>
+#include <list>
+#include <mutex>
+#include <queue>
+#include <stdint.h>
+#include <string>
+#include <thread>
+
+#include <va/va.h>
+
+class HTTPD;
+struct jpeg_compress_struct;
+struct VADisplayWithCleanup;
+struct VectorDestinationManager;
+
+class MJPEGEncoder {
+public:
+       MJPEGEncoder(HTTPD *httpd, const std::string &va_display);
+       void stop();
+       void upload_frame(int64_t pts, unsigned card_index, RefCountedFrame frame, const bmusb::VideoFormat &video_format, size_t y_offset, size_t cbcr_offset);
+
+private:
+       static constexpr int quality = 90;
+
+       struct QueuedFrame {
+               int64_t pts;
+               unsigned card_index;
+               RefCountedFrame frame;
+               bmusb::VideoFormat video_format;
+               size_t y_offset, cbcr_offset;
+       };
+
+       void encoder_thread_func();
+       std::vector<uint8_t> encode_jpeg(const QueuedFrame &qf);
+       std::vector<uint8_t> encode_jpeg_va(const QueuedFrame &qf);
+       std::vector<uint8_t> encode_jpeg_libjpeg(const QueuedFrame &qf);
+       void init_jpeg_422(unsigned width, unsigned height, VectorDestinationManager *dest, jpeg_compress_struct *cinfo);
+       std::vector<uint8_t> get_jpeg_header(unsigned width, unsigned height, jpeg_compress_struct *cinfo);
+
+       static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
+       int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
+
+       std::thread encoder_thread;
+
+       std::mutex mu;
+       std::queue<QueuedFrame> frames_to_be_encoded;  // Under mu.
+       std::condition_variable any_frames_to_be_encoded;
+
+       std::queue<QueuedFrame> frames_encoding;  // Under mu.
+       std::condition_variable any_frames_encoding;
+
+       AVFormatContextWithCloser avctx;
+       HTTPD *httpd;
+       std::string mux_header;
+       std::atomic<bool> should_quit{false};
+       bool running = false;
+
+       std::unique_ptr<VADisplayWithCleanup> va_dpy;
+       VAConfigID config_id;
+
+       struct VAData {
+               std::vector<uint8_t> jpeg_header;
+               VAEncPictureParameterBufferJPEG pic_param;
+               VAQMatrixBufferJPEG q;
+               VAHuffmanTableBufferJPEGBaseline huff;
+               VAEncSliceParameterBufferJPEG parms;
+       };
+       std::map<std::pair<unsigned, unsigned>, VAData> va_data_for_resolution;
+       VAData get_va_data_for_resolution(unsigned width, unsigned height);
+
+       struct VAResources {
+               unsigned width, height;
+               VASurfaceID surface;
+               VAContextID context;
+               VABufferID data_buffer;
+       };
+       std::list<VAResources> va_resources_freelist;
+       std::mutex va_resources_mutex;
+       VAResources get_va_resources(unsigned width, unsigned height);
+       void release_va_resources(VAResources resources);
+
+       // RAII wrapper to release VAResources on return (even on error).
+       class ReleaseVAResources {
+       public:
+               ReleaseVAResources(MJPEGEncoder *mjpeg, const VAResources &resources)
+                       : mjpeg(mjpeg), resources(resources) {}
+               ~ReleaseVAResources()
+               {
+                       if (!committed) {
+                               mjpeg->release_va_resources(resources);
+                       }
+               }
+
+               void commit() { committed = true; }
+
+       private:
+               MJPEGEncoder * const mjpeg;
+               const VAResources &resources;
+               bool committed = false;
+       };
+
+       static std::unique_ptr<VADisplayWithCleanup> try_open_va(const std::string &va_display, std::string *error, VAConfigID *config_id);
+
+       uint8_t *tmp_y, *tmp_cbcr, *tmp_cb, *tmp_cr;  // Private to the encoder thread.
+};
+
+#endif  // !defined(_MJPEG_ENCODER_H)