Add an option to scan through all possible modes for the PCI cards, as a substitute...

[nageru] / mixer.cpp

diff --git a/mixer.cpp b/mixer.cpp
index d725ad36b8fe84415d1b92f6201510b978029f2d..a1c038d5329abc21ad0e9a5015e0575f7658b959 100644 (file)
--- a/mixer.cpp
+++ b/mixer.cpp
@@ -329,6 +329,26 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
 {
        CaptureCard *card = &cards[card_index];
 
+       if (is_mode_scanning[card_index]) {
+               if (video_format.has_signal) {
+                       // Found a stable signal, so stop scanning.
+                       is_mode_scanning[card_index] = false;
+               } else {
+                       static constexpr double switch_time_s = 0.5;  // Should be enough time for the signal to stabilize.
+                       timespec now;
+                       clock_gettime(CLOCK_MONOTONIC, &now);
+                       double sec_since_last_switch = (now.tv_sec - last_mode_scan_change[card_index].tv_sec) +
+                               1e-9 * (now.tv_nsec - last_mode_scan_change[card_index].tv_nsec);
+                       if (sec_since_last_switch > switch_time_s) {
+                               // It isn't this mode; try the next one.
+                               mode_scanlist_index[card_index]++;
+                               mode_scanlist_index[card_index] %= mode_scanlist[card_index].size();
+                               cards[card_index].capture->set_video_mode(mode_scanlist[card_index][mode_scanlist_index[card_index]]);
+                               last_mode_scan_change[card_index] = now;
+                       }
+               }
+       }
+
        int64_t frame_length = int64_t(TIMEBASE * video_format.frame_rate_den) / video_format.frame_rate_nom;
 
        size_t num_samples = (audio_frame.len >= audio_offset) ? (audio_frame.len - audio_offset) / audio_format.num_channels / (audio_format.bits_per_sample / 8) : 0;
@@ -1037,6 +1057,23 @@ void Mixer::reset_meters()
        correlation.reset();
 }
 
+void Mixer::start_mode_scanning(unsigned card_index)
+{
+       assert(card_index < num_cards);
+       if (is_mode_scanning[card_index]) {
+               return;
+       }
+       is_mode_scanning[card_index] = true;
+       mode_scanlist[card_index].clear();
+       for (const auto &mode : cards[card_index].capture->get_available_video_modes()) {
+               mode_scanlist[card_index].push_back(mode.first);
+       }
+       assert(!mode_scanlist[card_index].empty());
+       mode_scanlist_index[card_index] = 0;
+       cards[card_index].capture->set_video_mode(mode_scanlist[card_index][0]);
+       clock_gettime(CLOCK_MONOTONIC, &last_mode_scan_change[card_index]);
+}
+
 Mixer::OutputChannel::~OutputChannel()
 {
        if (has_current_frame) {