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 "ref_counted_frame.h"
   8
   9 extern "C" {
  10
  11 #include <libavformat/avio.h>
  12
  13 }  // extern "C"
  14
  15 #include <atomic>
  16 #include <bmusb/bmusb.h>
  17 #include <condition_variable>
  18 #include <list>
  19 #include <mutex>
  20 #include <queue>
  21 #include <stdint.h>
  22 #include <string>
  23 #include <thread>
  24
  25 #include <movit/effect.h>
  26 #include <va/va.h>
  27
  28 struct jpeg_compress_struct;
  29 struct VADisplayWithCleanup;
  30 struct VectorDestinationManager;
  31
  32 #define CHECK_VASTATUS(va_status, func)                                 \
  33     if (va_status != VA_STATUS_SUCCESS) {                               \
  34         fprintf(stderr, "%s:%d (%s) failed: %s\n", __func__, __LINE__, func, vaErrorStr(va_status)); \
  35         exit(1);                                                        \
  36     }
  37
  38 class MJPEGEncoder {
  39 public:
  40         MJPEGEncoder(HTTPD *httpd, const std::string &va_display);
  41         ~MJPEGEncoder();
  42         void stop();
  43         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);
  44         bool using_vaapi() const { return va_dpy != nullptr; }
  45
  46         bool should_encode_mjpeg_for_card(unsigned card_index);
  47
  48 private:
  49         static constexpr int quality = 90;
  50
  51         struct VAResources {
  52                 unsigned width, height;
  53                 uint32_t fourcc;
  54                 VASurfaceID surface;
  55                 VAContextID context;
  56                 VABufferID data_buffer;
  57                 VAImage image;
  58         };
  59
  60         // RAII wrapper to release VAResources on return (even on error).
  61         class ReleaseVAResources {
  62         public:
  63                 ReleaseVAResources() : committed(true) {}
  64
  65                 ReleaseVAResources(MJPEGEncoder *mjpeg, const VAResources &resources)
  66                         : mjpeg(mjpeg), resources(resources) {}
  67
  68                 ReleaseVAResources(ReleaseVAResources &) = delete;
  69
  70                 ReleaseVAResources(ReleaseVAResources &&other)
  71                         : mjpeg(other.mjpeg), resources(other.resources), committed(other.committed) {
  72                         other.commit();
  73                 }
  74
  75                 ReleaseVAResources &operator= (ReleaseVAResources &) = delete;
  76
  77                 ReleaseVAResources &operator= (ReleaseVAResources &&other) {
  78                         if (!committed) {
  79                                 mjpeg->release_va_resources(resources);
  80                         }
  81                         mjpeg = other.mjpeg;
  82                         resources = std::move(other.resources);
  83                         committed = other.committed;
  84                         other.commit();
  85                         return *this;
  86                 }
  87
  88                 ~ReleaseVAResources()
  89                 {
  90                         if (!committed) {
  91                                 mjpeg->release_va_resources(resources);
  92                         }
  93                 }
  94
  95                 void commit() { committed = true; }
  96
  97         private:
  98                 MJPEGEncoder *mjpeg = nullptr;
  99                 VAResources resources;
 100                 bool committed = false;
 101         };
 102
 103         struct QueuedFrame {
 104                 int64_t pts;
 105                 unsigned card_index;
 106                 RefCountedFrame frame;
 107                 bmusb::VideoFormat video_format;
 108                 size_t y_offset, cbcr_offset;
 109                 std::vector<int32_t> audio;
 110                 movit::RGBTriplet white_balance;
 111
 112                 // Only for frames in the process of being encoded by VA-API.
 113                 VAResources resources;
 114                 ReleaseVAResources resource_releaser;
 115         };
 116
 117         void encoder_thread_func();
 118         void va_receiver_thread_func();
 119         void encode_jpeg_va(QueuedFrame &&qf);
 120         std::vector<uint8_t> encode_jpeg_libjpeg(const QueuedFrame &qf);
 121         void write_mjpeg_packet(AVFormatContext *avctx, int64_t pts, unsigned stream_index, const uint8_t *jpeg, size_t jpeg_size);
 122         void write_audio_packet(AVFormatContext *avctx, int64_t pts, unsigned stream_index, const std::vector<int32_t> &audio);
 123         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);
 124         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);
 125         void add_stream(HTTPD::StreamID stream_id);  // Can only be called from the constructor, or the thread owning <streams>.
 126         void update_siphon_streams();  // Same.
 127         void create_ffmpeg_context(HTTPD::StreamID stream_id);
 128
 129         struct WritePacket2Context {
 130                 MJPEGEncoder *mjpeg_encoder;
 131                 HTTPD::StreamID stream_id;
 132         };
 133         std::map<HTTPD::StreamID, WritePacket2Context> ffmpeg_contexts;   // Statically set up, so we never need to worry about dangling pointers.
 134         static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
 135         int write_packet2(HTTPD::StreamID stream_id, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
 136
 137         std::thread encoder_thread, va_receiver_thread;
 138
 139         std::mutex mu;
 140         std::queue<QueuedFrame> frames_to_be_encoded;  // Under mu.
 141         std::condition_variable any_frames_to_be_encoded;  // Governs changes in both frames_to_be_encoded and frames_under_encoding
 142
 143         std::queue<QueuedFrame> frames_encoding;  // Under mu. Used for VA-API only.
 144         std::condition_variable any_frames_encoding;
 145
 146         struct Stream {
 147                 AVFormatContextWithCloser avctx;
 148                 std::string mux_header;
 149         };
 150         std::map<HTTPD::StreamID, Stream> streams;  // Owned by the VA-API receiver thread if VA-API is active, or the encoder thread if not.
 151         HTTPD *httpd;
 152         std::atomic<bool> should_quit{false};
 153         bool running = false;
 154
 155         std::unique_ptr<VADisplayWithCleanup> va_dpy;
 156         VAConfigID config_id_422, config_id_420;
 157
 158         struct VAKey {
 159                 unsigned width, height, y_h_samp_factor, y_v_samp_factor;
 160                 movit::RGBTriplet white_balance;
 161
 162                 bool operator< (const VAKey &other) const {
 163                         if (width != other.width)
 164                                 return width < other.width;
 165                         if (height != other.height)
 166                                 return height < other.height;
 167                         if (y_h_samp_factor != other.y_h_samp_factor)
 168                                 return y_h_samp_factor < other.y_h_samp_factor;
 169                         if (y_v_samp_factor != other.y_v_samp_factor)
 170                                 return y_v_samp_factor < other.y_v_samp_factor;
 171                         if (white_balance.r != other.white_balance.r)
 172                                 return white_balance.r < other.white_balance.r;
 173                         if (white_balance.g != other.white_balance.g)
 174                                 return white_balance.g < other.white_balance.g;
 175                         return white_balance.b < other.white_balance.b;
 176                 }
 177         };
 178         struct VAData {
 179                 std::vector<uint8_t> jpeg_header;
 180                 VAEncPictureParameterBufferJPEG pic_param;
 181                 VAQMatrixBufferJPEG q;
 182                 VAHuffmanTableBufferJPEGBaseline huff;
 183                 VAEncSliceParameterBufferJPEG parms;
 184         };
 185         std::map<VAKey, VAData> va_data_for_parameters;
 186         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);
 187
 188         std::list<VAResources> va_resources_freelist;
 189         std::mutex va_resources_mutex;
 190         VAResources get_va_resources(unsigned width, unsigned height, uint32_t fourcc);
 191         void release_va_resources(VAResources resources);
 192
 193         uint8_t *tmp_y, *tmp_cbcr, *tmp_cb, *tmp_cr;  // Private to the encoder thread. Used by the libjpeg backend only.
 194
 195         std::atomic<int64_t> metric_mjpeg_frames_zero_size_dropped{0};
 196         std::atomic<int64_t> metric_mjpeg_frames_interlaced_dropped{0};
 197         std::atomic<int64_t> metric_mjpeg_frames_unsupported_pixel_format_dropped{0};
 198         std::atomic<int64_t> metric_mjpeg_frames_oversized_dropped{0};
 199         std::atomic<int64_t> metric_mjpeg_overrun_dropped{0};
 200         std::atomic<int64_t> metric_mjpeg_overrun_submitted{0};
 201
 202         friend class PBOFrameAllocator;  // FIXME
 203 };
 204
 205 #endif  // !defined(_MJPEG_ENCODER_H)