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::set<PixelFormat> get_available_pixel_formats() const override
  69         {
  70                 return std::set<PixelFormat>{ PixelFormat_8BitYCbCr, PixelFormat_10BitYCbCr };
  71         }
  72
  73         void set_pixel_format(PixelFormat pixel_format) override
  74         {
  75                 current_pixel_format = pixel_format;
  76         }
  77
  78         PixelFormat get_current_pixel_format() const
  79         {
  80                 return current_pixel_format;
  81         }
  82
  83         std::map<uint32_t, VideoMode> get_available_video_modes() const override;
  84         void set_video_mode(uint32_t video_mode_id) override;
  85         uint32_t get_current_video_mode() const override { return 0; }
  86
  87         std::map<uint32_t, std::string> get_available_video_inputs() const override;
  88         void set_video_input(uint32_t video_input_id) override;
  89         uint32_t get_current_video_input() const override { return 0; }
  90
  91         std::map<uint32_t, std::string> get_available_audio_inputs() const override;
  92         void set_audio_input(uint32_t audio_input_id) override;
  93         uint32_t get_current_audio_input() const override { return 0; }
  94
  95 private:
  96         void producer_thread_func();
  97         void make_tone(int32_t *out, unsigned num_stereo_samples, unsigned num_channels);
  98
  99         unsigned width, height, fps, audio_sample_frequency;
 100         PixelFormat current_pixel_format = PixelFormat_8BitYCbCr;
 101         int card_index;
 102         uint8_t y, cb, cr;
 103
 104         // sin(2 * pi * f / F) and similar for cos. Used for fast sine generation.
 105         // Zero when no audio.
 106         float audio_sin = 0.0f, audio_cos = 0.0f;
 107         float audio_real = 0.0f, audio_imag = 0.0f;  // Current state of the audio phaser.
 108         float audio_ref_level;
 109
 110         bool has_dequeue_callbacks = false;
 111         std::function<void()> dequeue_init_callback = nullptr;
 112         std::function<void()> dequeue_cleanup_callback = nullptr;
 113
 114         FrameAllocator *video_frame_allocator = nullptr;
 115         FrameAllocator *audio_frame_allocator = nullptr;
 116         std::unique_ptr<FrameAllocator> owned_video_frame_allocator;
 117         std::unique_ptr<FrameAllocator> owned_audio_frame_allocator;
 118         frame_callback_t frame_callback = nullptr;
 119
 120         std::string description;
 121
 122         std::atomic<bool> producer_thread_should_quit{false};
 123         std::thread producer_thread;
 124 };
 125
 126 }  // namespace bmusb
 127
 128 #endif  // !defined(_FAKE_CAPTURE_H)