/usr/include/bmusb/fake_capture.h is in libbmusb-dev 0.7.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | #ifndef _FAKE_CAPTURE_H
#define _FAKE_CAPTURE_H 1
#include <stdint.h>
#include <functional>
#include <string>
#include "bmusb/bmusb.h"
namespace bmusb {
class FakeCapture : public CaptureInterface
{
public:
FakeCapture(unsigned width, unsigned height, unsigned fps, unsigned audio_sample_frequency, int card_index, bool has_audio = false);
~FakeCapture();
// CaptureInterface.
void set_video_frame_allocator(FrameAllocator *allocator) override
{
video_frame_allocator = allocator;
if (owned_video_frame_allocator.get() != allocator) {
owned_video_frame_allocator.reset();
}
}
FrameAllocator *get_video_frame_allocator() override
{
return video_frame_allocator;
}
// Does not take ownership.
void set_audio_frame_allocator(FrameAllocator *allocator) override
{
audio_frame_allocator = allocator;
if (owned_audio_frame_allocator.get() != allocator) {
owned_audio_frame_allocator.reset();
}
}
FrameAllocator *get_audio_frame_allocator() override
{
return audio_frame_allocator;
}
void set_frame_callback(frame_callback_t callback) override
{
frame_callback = callback;
}
void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup) override
{
dequeue_init_callback = init;
dequeue_cleanup_callback = cleanup;
has_dequeue_callbacks = true;
}
std::string get_description() const override
{
return description;
}
void configure_card() override;
void start_bm_capture() override;
void stop_dequeue_thread() override;
bool get_disconnected() const override { return false; }
std::set<PixelFormat> get_available_pixel_formats() const override
{
return std::set<PixelFormat>{ PixelFormat_8BitYCbCr, PixelFormat_10BitYCbCr };
}
void set_pixel_format(PixelFormat pixel_format) override
{
current_pixel_format = pixel_format;
}
PixelFormat get_current_pixel_format() const
{
return current_pixel_format;
}
std::map<uint32_t, VideoMode> get_available_video_modes() const override;
void set_video_mode(uint32_t video_mode_id) override;
uint32_t get_current_video_mode() const override { return 0; }
std::map<uint32_t, std::string> get_available_video_inputs() const override;
void set_video_input(uint32_t video_input_id) override;
uint32_t get_current_video_input() const override { return 0; }
std::map<uint32_t, std::string> get_available_audio_inputs() const override;
void set_audio_input(uint32_t audio_input_id) override;
uint32_t get_current_audio_input() const override { return 0; }
private:
void producer_thread_func();
void make_tone(int32_t *out, unsigned num_stereo_samples, unsigned num_channels);
unsigned width, height, fps, audio_sample_frequency;
PixelFormat current_pixel_format = PixelFormat_8BitYCbCr;
int card_index;
uint8_t y, cb, cr;
// sin(2 * pi * f / F) and similar for cos. Used for fast sine generation.
// Zero when no audio.
float audio_sin = 0.0f, audio_cos = 0.0f;
float audio_real = 0.0f, audio_imag = 0.0f; // Current state of the audio phaser.
float audio_ref_level;
bool has_dequeue_callbacks = false;
std::function<void()> dequeue_init_callback = nullptr;
std::function<void()> dequeue_cleanup_callback = nullptr;
FrameAllocator *video_frame_allocator = nullptr;
FrameAllocator *audio_frame_allocator = nullptr;
std::unique_ptr<FrameAllocator> owned_video_frame_allocator;
std::unique_ptr<FrameAllocator> owned_audio_frame_allocator;
frame_callback_t frame_callback = nullptr;
std::string description;
std::atomic<bool> producer_thread_should_quit{false};
std::thread producer_thread;
};
} // namespace bmusb
#endif // !defined(_FAKE_CAPTURE_H)
|