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"
13 #include "queue_spot_holder.h"
16 #include <condition_variable>
19 #include <movit/effect_chain.h>
20 #include <movit/mix_effect.h>
21 #include <movit/ycbcr_input.h>
26 class ChromaSubsampler;
42 // “display_func” is called after the frame has been calculated (if needed)
43 // and has gone out to the stream.
44 void schedule_original_frame(std::chrono::steady_clock::time_point,
45 int64_t output_pts, std::function<void()> &&display_func,
46 QueueSpotHolder &&queue_spot_holder,
47 unsigned stream_idx, int64_t input_pts);
48 void schedule_faded_frame(std::chrono::steady_clock::time_point, int64_t output_pts,
49 std::function<void()> &&display_func,
50 QueueSpotHolder &&queue_spot_holder,
51 unsigned stream_idx, int64_t input_pts, int secondary_stream_idx,
52 int64_t secondary_input_pts, float fade_alpha);
53 void schedule_interpolated_frame(std::chrono::steady_clock::time_point, int64_t output_pts,
54 std::function<void()> &&display_func,
55 QueueSpotHolder &&queue_spot_holder,
56 unsigned stream_idx, int64_t input_first_pts, int64_t input_second_pts,
57 float alpha, int secondary_stream_idx = -1, int64_t secondary_inputs_pts = -1,
58 float fade_alpha = 0.0f); // -1 = no secondary frame.
59 void schedule_refresh_frame(std::chrono::steady_clock::time_point, int64_t output_pts,
60 std::function<void()> &&display_func,
61 QueueSpotHolder &&queue_spot_holder);
64 void encode_thread_func();
65 std::thread encode_thread;
67 static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
68 int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
70 // Allocated at the very start; if we're empty, we start dropping frames
71 // (so that we don't build up an infinite interpolation backlog).
72 struct InterpolatedFrameResources {
73 GLuint input_tex; // Layered (contains both input frames), Y'CbCr.
74 GLuint gray_tex; // Same, but Y only.
75 GLuint input_fbos[2]; // For rendering to the two layers of input_tex.
77 // Destination textures and FBO if there is a fade.
78 GLuint fade_y_output_tex, fade_cbcr_output_tex;
81 GLuint cb_tex, cr_tex; // Subsampled, final output.
83 GLuint pbo; // For reading the data back.
84 void *pbo_contents; // Persistently mapped.
86 std::deque<InterpolatedFrameResources> interpolate_resources; // Under <queue_lock>.
87 static constexpr size_t num_interpolate_slots = 15; // Should be larger than Player::max_queued_frames, or we risk mass-dropping frames.
90 std::chrono::steady_clock::time_point local_pts;
93 enum Type { ORIGINAL, FADED, INTERPOLATED, FADED_INTERPOLATED, REFRESH } type;
95 int64_t input_first_pts; // The only pts for original frames.
97 // For fades only (including fades against interpolated frames).
98 int secondary_stream_idx = -1;
99 int64_t secondary_input_pts;
101 // For interpolated frames only.
102 int64_t input_second_pts;
104 InterpolatedFrameResources resources;
105 RefCountedGLsync fence; // Set when the interpolated image is read back to the CPU.
106 GLuint flow_tex, output_tex, cbcr_tex; // Released in the receiving thread; not really used for anything else.
109 std::function<void()> display_func; // Called when the image is done decoding.
111 QueueSpotHolder queue_spot_holder;
113 std::deque<QueuedFrame> frame_queue; // Under <queue_lock>.
114 std::mutex queue_lock;
115 std::condition_variable queue_changed;
117 std::unique_ptr<Mux> stream_mux; // To HTTP.
118 std::string stream_mux_header;
119 bool seen_sync_markers = false;
121 std::unique_ptr<YCbCrConverter> ycbcr_converter;
122 std::unique_ptr<YCbCrConverter> ycbcr_semiplanar_converter;
124 // Frame interpolation.
125 std::unique_ptr<DISComputeFlow> compute_flow;
126 std::unique_ptr<Interpolate> interpolate, interpolate_no_split;
127 std::unique_ptr<ChromaSubsampler> chroma_subsampler;
129 std::vector<uint8_t> last_frame;
132 #endif // !defined(_VIDEO_STREAM_H)