git.sesse.net Git - bmusb/blob - bmusb/fake_capture.h

   1 #ifndef _FAKE_CAPTURE_H
   2 #define _FAKE_CAPTURE_H 1
   3
   4 #include <stdint.h>
   5 #include <functional>
   6 #include <string>
   7
   8 #include "bmusb/bmusb.h"
   9
  10 namespace bmusb {
  11
  12 class FakeCapture : public CaptureInterface
  13 {
  14 public:
  15         FakeCapture(unsigned width, unsigned height, unsigned fps, unsigned audio_sample_frequency, int card_index, bool has_audio = false);
  16         ~FakeCapture();
  17
  18         // CaptureInterface.
  19         void set_video_frame_allocator(FrameAllocator *allocator) override
  20         {
  21                 video_frame_allocator = allocator;
  22                 if (owned_video_frame_allocator.get() != allocator) {
  23                         owned_video_frame_allocator.reset();
  24                 }
  25         }
  26
  27         FrameAllocator *get_video_frame_allocator() override
  28         {
  29                 return video_frame_allocator;
  30         }
  31
  32         // Does not take ownership.
  33         void set_audio_frame_allocator(FrameAllocator *allocator) override
  34         {
  35                 audio_frame_allocator = allocator;
  36                 if (owned_audio_frame_allocator.get() != allocator) {
  37                         owned_audio_frame_allocator.reset();
  38                 }
  39         }
  40
  41         FrameAllocator *get_audio_frame_allocator() override
  42         {
  43                 return audio_frame_allocator;
  44         }
  45
  46         void set_frame_callback(frame_callback_t callback) override
  47         {
  48                 frame_callback = callback;
  49         }
  50
  51         void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup) override
  52         {
  53                 dequeue_init_callback = init;
  54                 dequeue_cleanup_callback = cleanup;
  55                 has_dequeue_callbacks = true;
  56         }
  57
  58         std::string get_description() const override
  59         {
  60                 return description;
  61         }
  62
  63         void configure_card() override;
  64         void start_bm_capture() override;
  65         void stop_dequeue_thread() override;
  66         bool get_disconnected() const override { return false; }
  67
  68         std::map<uint32_t, VideoMode> get_available_video_modes() const override;
  69         void set_video_mode(uint32_t video_mode_id) override;
  70         uint32_t get_current_video_mode() const override { return 0; }
  71
  72         std::map<uint32_t, std::string> get_available_video_inputs() const override;
  73         void set_video_input(uint32_t video_input_id) override;
  74         uint32_t get_current_video_input() const override { return 0; }
  75
  76         std::map<uint32_t, std::string> get_available_audio_inputs() const override;
  77         void set_audio_input(uint32_t audio_input_id) override;
  78         uint32_t get_current_audio_input() const override { return 0; }
  79
  80 private:
  81         void producer_thread_func();
  82         void make_tone(int32_t *out, unsigned num_stereo_samples);
  83
  84         unsigned width, height, fps, audio_sample_frequency;
  85         uint8_t y, cb, cr;
  86
  87         // sin(2 * pi * f / F) and similar for cos. Used for fast sine generation.
  88         // Zero when no audio.
  89         float audio_sin = 0.0f, audio_cos = 0.0f;
  90         float audio_real = 0.0f, audio_imag = 0.0f;  // Current state of the audio phaser.
  91         float audio_ref_level;
  92
  93         bool has_dequeue_callbacks = false;
  94         std::function<void()> dequeue_init_callback = nullptr;
  95         std::function<void()> dequeue_cleanup_callback = nullptr;
  96
  97         FrameAllocator *video_frame_allocator = nullptr;
  98         FrameAllocator *audio_frame_allocator = nullptr;
  99         std::unique_ptr<FrameAllocator> owned_video_frame_allocator;
 100         std::unique_ptr<FrameAllocator> owned_audio_frame_allocator;
 101         frame_callback_t frame_callback = nullptr;
 102
 103         std::string description;
 104
 105         std::atomic<bool> producer_thread_should_quit{false};
 106         std::thread producer_thread;
 107 };
 108
 109 }  // namespace bmusb
 110
 111 #endif  // !defined(_FAKE_CAPTURE_H)