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1 #pragma once
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2
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3 #include <functional>
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4 #include <SDK/titleformat.h>
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5 #include <SDK/timer.h>
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6
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7 namespace fb2k {
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8 class albumArtCache {
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9 public:
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10 albumArtCache( imageSize_t s = imageSizeMake(0,0) ) : m_tfSplit(titleformat_patterns::patternAlbumSplit()), imageSize(s), timeOut(0) {
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11 }
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12 bool isLoading() const { return m_imageLoader.is_valid(); }
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13 bool isLoadingExpired() const { return timeOut > 0 && m_imageLoader.is_valid() && m_timeOutTimer.is_empty(); }
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14 bool isLoadingNonExpired() const { return isLoading() && !isLoadingExpired(); }
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15 pfc::string8 albumIDOfTrack( trackRef trk ) {
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16 pfc::string8 pattern;
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17 if (trk.is_valid()) {
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18 trk->format_title(nullptr, pattern, m_tfSplit, nullptr);
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19 }
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20
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21 return pattern;
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22 }
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23
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24 std::function<void () > onLoaded;
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25 imageSize_t imageSize;
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26 double timeOut;
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27 imageRef getImage( trackRef trk, std::function<void (imageRef)> asyncRecv = nullptr ) {
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28 auto key = albumIDOfTrack( trk );
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29 if (strcmp(key, m_imageKey) != 0) {
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30 m_timeOutTimer.release();
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31 m_imageKey = key;
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32 m_image.release();
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33 m_imageLoader.release();
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34
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35 imageLocation_t loc;
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36 if (loc.setTrack2( trk ) ) {
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37 auto recv = makeObjReceiver( [this, asyncRecv] (objRef obj) {
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38 m_image ^= obj;
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39 if (m_imageLoader.is_valid()) {
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40 m_imageLoader.release();
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41 m_timeOutTimer.release();
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42 if (onLoaded) onLoaded();
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43 if (asyncRecv) asyncRecv(m_image);
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44 }
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45 } );
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46 m_imageLoader = imageLoader::get()->beginLoad(loc, this->imageSize, recv);
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47
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48 if (m_imageLoader.is_valid() && timeOut > 0) {
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49 m_timeOutTimer = fb2k::registerTimer( timeOut, [=, this] {
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50 m_timeOutTimer.release();
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51 if (onLoaded) onLoaded();
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52 if (asyncRecv) asyncRecv(nullptr);
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53 } );
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54 }
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55 }
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56 }
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57 return m_image;
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58 }
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59 void getImage2( trackRef trk, std::function<void (imageRef)> recv ) {
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60 auto img = getImage( trk, recv );
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61 if (! this->isLoading() ) recv( img );
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62 }
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63 void reset() {
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64 m_imageKey = "";
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65 m_image.release();
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66 m_imageLoader.release();
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67 m_timeOutTimer.release();
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68 }
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69 imageRef current() const { return m_image; }
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70 private:
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71
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72 titleformat_object_cache m_tfSplit;
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73 pfc::string8 m_imageKey;
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74 imageRef m_image;
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75 objRef m_imageLoader, m_timeOutTimer;
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76 };
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77 }
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