git.sesse.net Git - nageru/blob - nageru/mjpeg_encoder.h

   1 #ifndef _MJPEG_ENCODER_H
   2 #define _MJPEG_ENCODER_H 1
   3
   4 #include "defs.h"
   5 #include "shared/ffmpeg_raii.h"
   6 #include "shared/httpd.h"
   7 #include "shared/va_resource_pool.h"
   8 #include "ref_counted_frame.h"
   9
  10 extern "C" {
  11
  12 #include <libavformat/avio.h>
  13
  14 }  // extern "C"
  15
  16 #include <atomic>
  17 #include <bmusb/bmusb.h>
  18 #include <condition_variable>
  19 #include <list>
  20 #include <mutex>
  21 #include <queue>
  22 #include <stdint.h>
  23 #include <string>
  24 #include <thread>
  25
  26 #include <movit/effect.h>
  27 #include <va/va.h>
  28
  29 struct jpeg_compress_struct;
  30 struct VADisplayWithCleanup;
  31 struct VectorDestinationManager;
  32
  33 #define CHECK_VASTATUS(va_status, func)                                 \
  34     if (va_status != VA_STATUS_SUCCESS) {                               \
  35         fprintf(stderr, "%s:%d (%s) failed: %s\n", __func__, __LINE__, func, vaErrorStr(va_status)); \
  36         exit(1);                                                        \
  37     }
  38
  39 class MJPEGEncoder {
  40 public:
  41         MJPEGEncoder(HTTPD *httpd, const std::string &va_display);
  42         ~MJPEGEncoder();
  43         void stop();
  44         void upload_frame(int64_t pts, unsigned card_index, RefCountedFrame frame, const bmusb::VideoFormat &video_format, size_t y_offset, size_t cbcr_offset, std::vector<int32_t> audio, const movit::RGBTriplet &white_balance);
  45         bool using_vaapi() const { return va_dpy != nullptr; }
  46
  47         bool should_encode_mjpeg_for_card(unsigned card_index);
  48         VAResourcePool *get_va_pool() const { return va_pool.get(); }
  49
  50 private:
  51         static constexpr int quality = 90;
  52
  53         struct QueuedFrame {
  54                 int64_t pts;
  55                 unsigned card_index;
  56                 RefCountedFrame frame;
  57                 bmusb::VideoFormat video_format;
  58                 size_t y_offset, cbcr_offset;
  59                 std::vector<int32_t> audio;
  60                 movit::RGBTriplet white_balance;
  61
  62                 // Only for frames in the process of being encoded by VA-API.
  63                 VAResourcePool::VAResources resources;
  64                 ReleaseVAResources resource_releaser;
  65         };
  66
  67         void encoder_thread_func();
  68         void va_receiver_thread_func();
  69         void encode_jpeg_va(QueuedFrame &&qf);
  70         std::vector<uint8_t> encode_jpeg_libjpeg(const QueuedFrame &qf);
  71         void write_mjpeg_packet(AVFormatContext *avctx, int64_t pts, unsigned stream_index, const uint8_t *jpeg, size_t jpeg_size);
  72         void write_audio_packet(AVFormatContext *avctx, int64_t pts, unsigned stream_index, const std::vector<int32_t> &audio);
  73         void init_jpeg(unsigned width, unsigned height, const movit::RGBTriplet &white_balance, VectorDestinationManager *dest, jpeg_compress_struct *cinfo, int y_h_samp_factor, int y_v_samp_factor);
  74         std::vector<uint8_t> get_jpeg_header(unsigned width, unsigned height, const movit::RGBTriplet &white_balance, int y_h_samp_factor, int y_v_samp_factor, jpeg_compress_struct *cinfo);
  75         void add_stream(HTTPD::StreamID stream_id);  // Can only be called from the constructor, or the thread owning <streams>.
  76         void update_siphon_streams();  // Same.
  77         void create_ffmpeg_context(HTTPD::StreamID stream_id);
  78
  79         struct WritePacket2Context {
  80                 MJPEGEncoder *mjpeg_encoder;
  81                 HTTPD::StreamID stream_id;
  82         };
  83         std::map<HTTPD::StreamID, WritePacket2Context> ffmpeg_contexts;   // Statically set up, so we never need to worry about dangling pointers.
  84         static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  85         int write_packet2(HTTPD::StreamID stream_id, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  86
  87         std::thread encoder_thread, va_receiver_thread;
  88
  89         std::mutex mu;
  90         std::queue<QueuedFrame> frames_to_be_encoded;  // Under mu.
  91         std::condition_variable any_frames_to_be_encoded;  // Governs changes in both frames_to_be_encoded and frames_under_encoding
  92
  93         std::queue<QueuedFrame> frames_encoding;  // Under mu. Used for VA-API only.
  94         std::condition_variable any_frames_encoding;
  95
  96         struct Stream {
  97                 AVFormatContextWithCloser avctx;
  98                 std::string mux_header;
  99         };
 100         std::map<HTTPD::StreamID, Stream> streams;  // Owned by the VA-API receiver thread if VA-API is active, or the encoder thread if not.
 101         HTTPD *httpd;
 102         std::atomic<bool> should_quit{false};
 103         bool running = false;
 104
 105         std::unique_ptr<VADisplayWithCleanup> va_dpy;
 106         std::unique_ptr<VAResourcePool> va_pool;
 107
 108         struct VAKey {
 109                 unsigned width, height, y_h_samp_factor, y_v_samp_factor;
 110                 movit::RGBTriplet white_balance;
 111
 112                 bool operator< (const VAKey &other) const {
 113                         if (width != other.width)
 114                                 return width < other.width;
 115                         if (height != other.height)
 116                                 return height < other.height;
 117                         if (y_h_samp_factor != other.y_h_samp_factor)
 118                                 return y_h_samp_factor < other.y_h_samp_factor;
 119                         if (y_v_samp_factor != other.y_v_samp_factor)
 120                                 return y_v_samp_factor < other.y_v_samp_factor;
 121                         if (white_balance.r != other.white_balance.r)
 122                                 return white_balance.r < other.white_balance.r;
 123                         if (white_balance.g != other.white_balance.g)
 124                                 return white_balance.g < other.white_balance.g;
 125                         return white_balance.b < other.white_balance.b;
 126                 }
 127         };
 128         struct VAData {
 129                 std::vector<uint8_t> jpeg_header;
 130                 VAEncPictureParameterBufferJPEG pic_param;
 131                 VAQMatrixBufferJPEG q;
 132                 VAHuffmanTableBufferJPEGBaseline huff;
 133                 VAEncSliceParameterBufferJPEG parms;
 134         };
 135         std::map<VAKey, VAData> va_data_for_parameters;
 136         VAData get_va_data_for_parameters(unsigned width, unsigned height, unsigned y_h_samp_factor, unsigned y_v_samp_factor, const movit::RGBTriplet &white_balance);
 137
 138         uint8_t *tmp_y, *tmp_cbcr, *tmp_cb, *tmp_cr;  // Private to the encoder thread. Used by the libjpeg backend only.
 139
 140         std::atomic<int64_t> metric_mjpeg_frames_zero_size_dropped{0};
 141         std::atomic<int64_t> metric_mjpeg_frames_interlaced_dropped{0};
 142         std::atomic<int64_t> metric_mjpeg_frames_unsupported_pixel_format_dropped{0};
 143         std::atomic<int64_t> metric_mjpeg_frames_oversized_dropped{0};
 144         std::atomic<int64_t> metric_mjpeg_overrun_dropped{0};
 145         std::atomic<int64_t> metric_mjpeg_overrun_submitted{0};
 146
 147         friend class PBOFrameAllocator;  // FIXME
 148 };
 149
 150 #endif  // !defined(_MJPEG_ENCODER_H)