1 #ifndef _VIDEO_STREAM_H
2 #define _VIDEO_STREAM_H 1
8 #include <libavformat/avio.h>
11 #include "frame_on_disk.h"
12 #include "jpeg_frame_view.h"
13 #include "shared/ref_counted_gl_sync.h"
14 #include "queue_spot_holder.h"
18 #include <condition_variable>
21 #include <movit/effect_chain.h>
22 #include <movit/mix_effect.h>
23 #include <movit/ycbcr_input.h>
28 class ChromaSubsampler;
44 // “display_func” is called after the frame has been calculated (if needed)
45 // and has gone out to the stream.
46 void schedule_original_frame(std::chrono::steady_clock::time_point,
47 int64_t output_pts, std::function<void()> &&display_func,
48 QueueSpotHolder &&queue_spot_holder,
50 void schedule_faded_frame(std::chrono::steady_clock::time_point, int64_t output_pts,
51 std::function<void()> &&display_func,
52 QueueSpotHolder &&queue_spot_holder,
53 FrameOnDisk frame1, FrameOnDisk frame2,
55 void schedule_interpolated_frame(std::chrono::steady_clock::time_point, int64_t output_pts,
56 std::function<void(std::shared_ptr<Frame>)> &&display_func,
57 QueueSpotHolder &&queue_spot_holder,
58 FrameOnDisk frame1, FrameOnDisk frame2,
59 float alpha, FrameOnDisk secondary_frame = {}, // Empty = no secondary (fade) frame.
60 float fade_alpha = 0.0f);
61 void schedule_refresh_frame(std::chrono::steady_clock::time_point, int64_t output_pts,
62 std::function<void()> &&display_func,
63 QueueSpotHolder &&queue_spot_holder);
66 FrameReader frame_reader;
68 void encode_thread_func();
69 std::thread encode_thread;
70 std::atomic<bool> should_quit{false};
72 static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
73 int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
75 // Allocated at the very start; if we're empty, we start dropping frames
76 // (so that we don't build up an infinite interpolation backlog).
77 struct InterpolatedFrameResources {
78 VideoStream *owner; // Used only for IFRReleaser, below.
80 GLuint input_tex; // Layered (contains both input frames), Y'CbCr.
81 GLuint gray_tex; // Same, but Y only.
82 GLuint input_fbos[2]; // For rendering to the two layers of input_tex.
84 // Destination textures and FBO if there is a fade.
85 GLuint fade_y_output_tex, fade_cbcr_output_tex;
88 GLuint cb_tex, cr_tex; // Subsampled, final output.
90 GLuint pbo; // For reading the data back.
91 void *pbo_contents; // Persistently mapped.
93 std::mutex queue_lock;
94 std::deque<std::unique_ptr<InterpolatedFrameResources>> interpolate_resources; // Under <queue_lock>.
95 static constexpr size_t num_interpolate_slots = 15; // Should be larger than Player::max_queued_frames, or we risk mass-dropping frames.
98 void operator() (InterpolatedFrameResources *ifr) const
100 if (ifr != nullptr) {
101 std::unique_lock<std::mutex> lock(ifr->owner->queue_lock);
102 ifr->owner->interpolate_resources.emplace_back(ifr);
106 using BorrowedInterpolatedFrameResources = std::unique_ptr<InterpolatedFrameResources, IFRReleaser>;
109 std::chrono::steady_clock::time_point local_pts;
112 enum Type { ORIGINAL, FADED, INTERPOLATED, FADED_INTERPOLATED, REFRESH } type;
113 FrameOnDisk frame1; // The only frame for original frames.
115 // For fades only (including fades against interpolated frames).
116 FrameOnDisk secondary_frame;
118 // For interpolated frames only.
121 BorrowedInterpolatedFrameResources resources;
122 RefCountedGLsync fence; // Set when the interpolated image is read back to the CPU.
123 GLuint flow_tex, output_tex, cbcr_tex; // Released in the receiving thread; not really used for anything else.
126 std::function<void()> display_func; // Called when the image is done decoding.
127 std::function<void(std::shared_ptr<Frame>)> display_decoded_func; // Same, except for INTERPOLATED and FADED_INTERPOLATED.
129 QueueSpotHolder queue_spot_holder;
131 std::deque<QueuedFrame> frame_queue; // Under <queue_lock>.
132 std::condition_variable queue_changed;
134 std::unique_ptr<Mux> stream_mux; // To HTTP.
135 std::string stream_mux_header;
136 bool seen_sync_markers = false;
138 std::unique_ptr<YCbCrConverter> ycbcr_converter;
139 std::unique_ptr<YCbCrConverter> ycbcr_semiplanar_converter;
141 // Frame interpolation.
142 std::unique_ptr<DISComputeFlow> compute_flow;
143 std::unique_ptr<Interpolate> interpolate, interpolate_no_split;
144 std::unique_ptr<ChromaSubsampler> chroma_subsampler;
146 std::vector<uint8_t> last_frame;
149 #endif // !defined(_VIDEO_STREAM_H)