3 files changed, 31 insertions, 2 deletions

diff --git a/src/audio/player.c b/src/audio/player.c
index 9e026561..a2a3955b 100644
--- a/src/audio/player.c
+++ b/src/audio/player.c
@@ -724,6 +724,13 @@ void updateSourceData_Player(iPlayer *d, const iString *mimeType, const iBlock *
     unlock_Mutex(&input->mtx);
 }
 
+size_t sourceDataSize_Player(const iPlayer *d) {
+    lock_Mutex(&d->data->mtx);
+    const size_t size = size_Block(&d->data->data);
+    unlock_Mutex(&d->data->mtx);
+    return size;
+}
+
 iBool start_Player(iPlayer *d) {
     if (isStarted_Player(d)) {
         return iFalse;
diff --git a/src/audio/player.h b/src/audio/player.h
index 8753d811..b131838d 100644
--- a/src/audio/player.h
+++ b/src/audio/player.h
@@ -48,6 +48,7 @@ enum iPlayerTag {
 
 void    updateSourceData_Player (iPlayer *, const iString *mimeType, const iBlock *data,
                                  enum iPlayerUpdate update);
+size_t  sourceDataSize_Player   (const iPlayer *);
 
 iBool           start_Player            (iPlayer *);
 void            stop_Player             (iPlayer *);
diff --git a/src/media.c b/src/media.c
index 180c28e6..eb4a8311 100644
--- a/src/media.c
+++ b/src/media.c
@@ -24,6 +24,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 #include "gmdocument.h"
 #include "gmrequest.h"
 #include "ui/window.h"
+#include "ui/paint.h" /* size_SDLTexture */
 #include "audio/player.h"
 #include "app.h"
 #include "stb_image.h"
@@ -262,8 +263,28 @@ void clear_Media(iMedia *d) {
 }
 
 size_t memorySize_Media(const iMedia *d) {
-    /* TODO: Calculate the actual memory use. */
-    return 0; 
+    size_t memSize = 0;
+    iConstForEach(PtrArray, i, &d->images) {
+        const iGmImage *img = i.ptr;
+        if (img->texture) {
+            const iInt2 texSize = size_SDLTexture(img->texture);
+            memSize += 4 * texSize.x * texSize.y; /* RGBA */
+        }
+        else {
+            memSize += size_Block(&img->partialData);
+        }
+    }
+    iConstForEach(PtrArray, a, &d->audio) {
+        const iGmAudio *audio = a.ptr;
+        if (audio->player) {
+            memSize += sourceDataSize_Player(audio->player);
+        }
+    }
+    iConstForEach(PtrArray, n, &d->downloads) {
+        const iGmDownload *down = n.ptr;
+        memSize += down->numBytes;
+    }
+    return memSize; 
 }
 
 iBool setDownloadUrl_Media(iMedia *d, iGmLinkId linkId, const iString *url) {