1 #ifndef _VIDEO_STREAM_H
2 #define _VIDEO_STREAM_H 1
8 #include <libavformat/avio.h>
11 #include "jpeg_frame_view.h"
12 #include "ref_counted_gl_sync.h"
14 #include <condition_variable>
17 #include <movit/effect_chain.h>
18 #include <movit/mix_effect.h>
19 #include <movit/ycbcr_input.h>
24 class ChromaSubsampler;
39 // “display_func” is called after the frame has been calculated (if needed)
40 // and has gone out to the stream.
41 void schedule_original_frame(int64_t output_pts, std::function<void()> &&display_func, unsigned stream_idx, int64_t input_pts);
42 void schedule_faded_frame(int64_t output_pts, std::function<void()> &&display_func, unsigned stream_idx, int64_t input_pts, int secondary_stream_idx, int64_t secondary_input_pts, float fade_alpha);
43 void schedule_interpolated_frame(int64_t output_pts, std::function<void()> &&display_func, unsigned stream_idx, int64_t input_first_pts, int64_t input_second_pts, float alpha, int secondary_stream_idx = -1, int64_t secondary_inputs_pts = -1, float fade_alpha = 0.0f); // -1 = no secondary frame.
44 void schedule_refresh_frame(int64_t output_pts, std::function<void()> &&display_func);
47 void encode_thread_func();
48 std::thread encode_thread;
50 static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
51 int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
53 // Allocated at the very start; if we're empty, we start dropping frames
54 // (so that we don't build up an infinite interpolation backlog).
55 struct InterpolatedFrameResources {
56 GLuint input_tex; // Layered (contains both input frames), Y'CbCr.
57 GLuint gray_tex; // Same, but Y only.
58 GLuint input_fbos[2]; // For rendering to the two layers of input_tex.
60 // Destination textures and FBO if there is a fade.
61 GLuint fade_y_output_tex, fade_cbcr_output_tex;
64 GLuint cb_tex, cr_tex; // Subsampled, final output.
66 GLuint pbo; // For reading the data back.
67 void *pbo_contents; // Persistently mapped.
69 std::deque<InterpolatedFrameResources> interpolate_resources; // Under <queue_lock>.
70 static constexpr size_t num_interpolate_slots = 10;
74 enum Type { ORIGINAL, FADED, INTERPOLATED, FADED_INTERPOLATED, REFRESH } type;
76 int64_t input_first_pts; // The only pts for original frames.
78 // For fades only (including fades against interpolated frames).
79 int secondary_stream_idx = -1;
80 int64_t secondary_input_pts;
82 // For interpolated frames only.
83 int64_t input_second_pts;
85 InterpolatedFrameResources resources;
86 RefCountedGLsync fence; // Set when the interpolated image is read back to the CPU.
87 GLuint flow_tex, output_tex, cbcr_tex; // Released in the receiving thread; not really used for anything else.
90 std::function<void()> display_func; // Called when the image is done decoding.
92 std::deque<QueuedFrame> frame_queue; // Under <queue_lock>.
93 std::mutex queue_lock;
94 std::condition_variable queue_nonempty;
96 std::unique_ptr<Mux> stream_mux; // To HTTP.
97 std::string stream_mux_header;
98 bool seen_sync_markers = false;
100 std::unique_ptr<YCbCrConverter> ycbcr_converter;
101 std::unique_ptr<YCbCrConverter> ycbcr_semiplanar_converter;
103 // Frame interpolation.
104 std::unique_ptr<DISComputeFlow> compute_flow;
105 std::unique_ptr<Interpolate> interpolate, interpolate_no_split;
106 std::unique_ptr<ChromaSubsampler> chroma_subsampler;
108 std::vector<uint8_t> last_frame;
111 #endif // !defined(_VIDEO_STREAM_H)