class ALSAOutput;
class ChromaSubsampler;
+class DeckLinkOutput;
class QSurface;
class QSurfaceFormat;
return cards[card_index].capture->get_description();
}
+ // The difference between this and the previous function is that if a card
+ // is used as the current output, get_card_description() will return the
+ // fake card that's replacing it for input, whereas this function will return
+ // the card's actual name.
+ std::string get_output_card_description(unsigned card_index) const {
+ assert(card_can_be_used_as_output(card_index));
+ assert(card_index < num_cards);
+ if (cards[card_index].parked_capture) {
+ return cards[card_index].parked_capture->get_description();
+ } else {
+ return cards[card_index].capture->get_description();
+ }
+ }
+
+ bool card_can_be_used_as_output(unsigned card_index) const {
+ assert(card_index < num_cards);
+ return cards[card_index].output != nullptr;
+ }
+
std::map<uint32_t, bmusb::VideoMode> get_available_video_modes(unsigned card_index) const {
assert(card_index < num_cards);
return cards[card_index].capture->get_available_video_modes();
video_encoder->change_x264_bitrate(rate_kbit);
}
+ int get_output_card_index() const { // -1 = no output, just stream.
+ return desired_output_card_index;
+ }
+
+ void set_output_card(int card_index) { // -1 = no output, just stream.
+ desired_output_card_index = card_index;
+ }
+
+ std::map<uint32_t, bmusb::VideoMode> get_available_output_video_modes() const;
+
+ uint32_t get_output_video_mode() const {
+ return desired_output_video_mode;
+ }
+
+ void set_output_video_mode(uint32_t mode) {
+ desired_output_video_mode = mode;
+ }
+
private:
- void configure_card(unsigned card_index, bmusb::CaptureInterface *capture, bool is_fake_capture);
+ void configure_card(unsigned card_index, bmusb::CaptureInterface *capture, bool is_fake_capture, DeckLinkOutput *output);
+ void set_output_card_internal(int card_index); // Should only be called from the mixer thread.
void bm_frame(unsigned card_index, uint16_t timecode,
bmusb::FrameAllocator::Frame video_frame, size_t video_offset, bmusb::VideoFormat video_format,
bmusb::FrameAllocator::Frame audio_frame, size_t audio_offset, bmusb::AudioFormat audio_format);
void place_rectangle(movit::Effect *resample_effect, movit::Effect *padding_effect, float x0, float y0, float x1, float y1);
void thread_func();
void handle_hotplugged_cards();
- void schedule_audio_resampling_tasks(unsigned dropped_frames, int num_samples_per_frame, int length_per_frame);
+ void schedule_audio_resampling_tasks(unsigned dropped_frames, int num_samples_per_frame, int length_per_frame, bool is_preroll, std::chrono::steady_clock::time_point frame_timestamp);
void render_one_frame(int64_t duration);
void audio_thread_func();
void release_display_frame(DisplayFrame *frame);
HTTPD httpd;
unsigned num_cards;
- QSurface *mixer_surface, *h264_encoder_surface;
+ QSurface *mixer_surface, *h264_encoder_surface, *decklink_output_surface;
std::unique_ptr<movit::ResourcePool> resource_pool;
std::unique_ptr<Theme> theme;
std::atomic<unsigned> audio_source_channel{0};
- std::atomic<unsigned> master_clock_channel{0};
+ std::atomic<int> master_clock_channel{0}; // Gets overridden by <output_card_index> if set.
+ int output_card_index = -1; // -1 for none.
+ uint32_t output_video_mode = -1;
+
+ // The mechanics of changing the output card and modes are so intricately connected
+ // with the work the mixer thread is doing. Thus, we don't change it directly,
+ // we just set this variable instead, which signals to the mixer thread that
+ // it should do the change before the next frame. This simplifies locking
+ // considerations immensely.
+ std::atomic<int> desired_output_card_index{-1};
+ std::atomic<uint32_t> desired_output_video_mode{0};
+
std::unique_ptr<movit::EffectChain> display_chain;
std::unique_ptr<ChromaSubsampler> chroma_subsampler;
std::unique_ptr<VideoEncoder> video_encoder;
// frame rate is integer, will always stay zero.
unsigned fractional_samples = 0;
- std::mutex card_mutex;
+ mutable std::mutex card_mutex;
bool has_bmusb_thread = false;
struct CaptureCard {
- bmusb::CaptureInterface *capture = nullptr;
+ std::unique_ptr<bmusb::CaptureInterface> capture;
bool is_fake_capture;
+ std::unique_ptr<DeckLinkOutput> output;
+
+ // If this card is used for output (ie., output_card_index points to it),
+ // it cannot simultaneously be uesd for capture, so <capture> gets replaced
+ // by a FakeCapture. However, since reconstructing the real capture object
+ // with all its state can be annoying, it is not being deleted, just stopped
+ // and moved here.
+ std::unique_ptr<bmusb::CaptureInterface> parked_capture;
+
std::unique_ptr<PBOFrameAllocator> frame_allocator;
// Stuff for the OpenGL context (for texture uploading).
};
CaptureCard cards[MAX_VIDEO_CARDS]; // Protected by <card_mutex>.
AudioMixer audio_mixer; // Same as global_audio_mixer (see audio_mixer.h).
+ bool input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const;
struct OutputFrameInfo {
int dropped_frames; // Since last frame.
int num_samples; // Audio samples needed for this output frame.
int64_t frame_duration; // In TIMEBASE units.
+ bool is_preroll;
+ std::chrono::steady_clock::time_point frame_timestamp;
};
- OutputFrameInfo get_one_frame_from_each_card(unsigned master_card_index, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS]);
+ OutputFrameInfo get_one_frame_from_each_card(unsigned master_card_index, bool master_card_is_output, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS]);
InputState input_state;
int64_t pts_int;
int num_samples;
bool adjust_rate;
+ std::chrono::steady_clock::time_point frame_timestamp;
};
std::mutex audio_mutex;
std::condition_variable audio_task_queue_changed;
projects / nageru / blobdiff