CheckSound effectively matching

src/DETHRACE/common/piping.c

@@ -2229,8 +2229,19 @@ int CheckSound(tPipe_chunk* pChunk_ptr, int pChunk_count, tU32 pTime) {
     int sound_length;
     tPipe_chunk* temp_ptr;
 
-    STUB_ONCE();
-    return 1;
+    temp_ptr = pChunk_ptr;
+    for (i = 0; i < pChunk_count; i++) {
+        sound_length = S3GetSampleLength(temp_ptr->subject_index);
+        if (temp_ptr->chunk_data.sound_data.pitch > 1) {
+            sound_length = (double)sound_length / ((double)temp_ptr->chunk_data.sound_data.pitch / 65536.0);
+        }
+        if (pTime + sound_length >= gYoungest_time && pTime + sound_length < gOldest_time) {
+            ApplySound(&temp_ptr);
+        } else {
+            AdvanceChunkPtr(&temp_ptr, ePipe_chunk_sound);
+        }
+    }
+    return 0;
 }
 
 // IDA: int __usercall SoundTimeout@<EAX>(tU32 pTime@<EAX>)

src/S3/s3sound.c

@@ -286,6 +286,20 @@ int S3ExecuteSampleFilterFuncs(tS3_channel* chan) {
     return 0;
 }
 
+// FUNCTION: CARM95 0x004C9577
+int S3GetSampleLength(tS3_sound_tag tag) {
+    tS3_descriptor* descriptor;
+    tS3_sample* sound_data;
+
+    descriptor = S3GetDescriptorByID(tag);
+    if (descriptor) {
+        sound_data = (tS3_sample*)descriptor->sound_data;
+        return 1000 * sound_data->size / sound_data->rate;
+    } else {
+        return 0;
+    }
+}
+
 int S3PlaySample(tS3_channel* chan) {
     tS3_sample* sound_data;
 

src/S3/s3sound.h

@@ -15,6 +15,7 @@ int S3CreateTypeStructs(tS3_channel* chan);
 int S3ReleaseTypeStructs(tS3_channel* chan);
 int S3StopSample(tS3_channel* chan);
 int S3ExecuteSampleFilterFuncs(tS3_channel* chan);
+int S3GetSampleLength(tS3_sound_tag tag);
 int S3SyncSampleVolumeAndPan(tS3_channel* chan);
 int S3SyncSampleRate(tS3_channel* chan);