Enable input mode autodetection for DeckLink cards that support it.

diff --git a/decklink_capture.cpp b/decklink_capture.cpp
index 348ee28ef002e055f4b306b771fc23491ed520f9..16c187d2e56b55c6553bd69478e0c34ea432cd08 100644 (file)
--- a/decklink_capture.cpp
+++ b/decklink_capture.cpp
@@ -205,6 +205,12 @@ DeckLinkCapture::DeckLinkCapture(IDeckLink *card, int card_index)
                }
        }
 
+       // Check if we the card supports input autodetection.
+       if (attr->GetFlag(BMDDeckLinkSupportsInputFormatDetection, &supports_autodetect) != S_OK) {
+               fprintf(stderr, "Warning: Failed to ask card %d whether it supports input format autodetection\n", card_index);
+               supports_autodetect = false;
+       }
+
        // If there's more than one subdevice on this card, label them.
        int64_t num_subdevices, subdevice_idx;
        if (attr->GetInt(BMDDeckLinkNumberOfSubDevices, &num_subdevices) == S_OK && num_subdevices > 1) {
@@ -273,8 +279,15 @@ ULONG STDMETHODCALLTYPE DeckLinkCapture::Release(void)
 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFormatChanged(
        BMDVideoInputFormatChangedEvents,
        IDeckLinkDisplayMode* display_mode,
-       BMDDetectedVideoInputFormatFlags)
+       BMDDetectedVideoInputFormatFlags format_flags)
 {
+       if (format_flags & bmdDetectedVideoInputRGB444) {
+               fprintf(stderr, "WARNING: Input detected as 4:4:4 RGB, but Nageru can't consume that yet.\n");
+               fprintf(stderr, "Doing hardware conversion to 4:2:2 Y'CbCr.\n");
+       }
+       if (supports_autodetect && display_mode->GetDisplayMode() != current_video_mode) {
+               set_video_mode(display_mode->GetDisplayMode());
+       }
        if (display_mode->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
                fprintf(stderr, "Could not get new frame rate\n");
                exit(1);
@@ -391,7 +404,7 @@ void DeckLinkCapture::start_bm_capture()
        if (running) {
                return;
        }
-       if (input->EnableVideoInput(current_video_mode, bmdFormat8BitYUV, 0) != S_OK) {
+       if (input->EnableVideoInput(current_video_mode, bmdFormat8BitYUV, supports_autodetect ? bmdVideoInputEnableFormatDetection : 0) != S_OK) {
                fprintf(stderr, "Failed to set video mode 0x%04x for card %d\n", current_video_mode, card_index);
                exit(1);
        }
@@ -465,7 +478,7 @@ void DeckLinkCapture::set_video_mode_no_restart(uint32_t video_mode_id)
        field_dominance = display_mode->GetFieldDominance();
 
        if (running) {
-               if (input->EnableVideoInput(video_mode_id, bmdFormat8BitYUV, 0) != S_OK) {
+               if (input->EnableVideoInput(video_mode_id, bmdFormat8BitYUV, supports_autodetect ? bmdVideoInputEnableFormatDetection : 0) != S_OK) {
                        fprintf(stderr, "Failed to set video mode 0x%04x for card %d\n", video_mode_id, card_index);
                        exit(1);
                }

diff --git a/decklink_capture.h b/decklink_capture.h
index 31efc3711f1ef87cfaf8915182aaec6de1cd257f..1bdf9ade9ca96232dab2df839b761a64f9c54fb2 100644 (file)
--- a/decklink_capture.h
+++ b/decklink_capture.h
@@ -128,6 +128,7 @@ private:
        BMDTimeScale time_scale;
        BMDFieldDominance field_dominance;
        bool running = false;
+       bool supports_autodetect = false;
 
        std::map<uint32_t, bmusb::VideoMode> video_modes;
        BMDDisplayMode current_video_mode;