mkclean: add support for Zstd compression via new --compalgo option

Author: robUx4

mkclean/mkclean.c

@@ -1517,6 +1517,7 @@ int main(int argc, const char *argv[])
     mkv_timestamp_t PrevTimestamp;
     bool_t CuesChanged;
     bool_t KeepCues = 0, Remux = 0, CuesCreated = 0, Optimize = 0, OptimizeVideo = 1, UnOptimize = 0, ClustersNeedRead = 0, Regression = 0;
+    MatroskaTrackEncodingCompAlgo CompressionAlgo = MATROSKA_TRACK_ENCODING_COMP_ZLIB;
     int InputPathIndex = 1;
     int64_t TimestampScale = 0, OldTimestampScale;
     size_t MaxTrackNum = 0;
@@ -1623,6 +1624,26 @@ int main(int argc, const char *argv[])
         else if (tcsisame_ascii(Path,T("--unsafe"))) { Unsafe = 1; InputPathIndex = i+1; }
         else if (tcsisame_ascii(Path,T("--optimize"))) { Optimize = 1; OptimizeVideo = 1; InputPathIndex = i+1; }
         else if (tcsisame_ascii(Path,T("--optimize_nv"))) { Optimize = 1; OptimizeVideo = 0; InputPathIndex = i+1; }
+        else if (tcsisame_ascii(Path,T("--compalgo")) && i+1<argc-1)
+        {
+#if defined(TARGET_WIN) && defined(UNICODE)
+            Node_FromWcs(&p,Path,TSIZEOF(Path),argv[++i]);
+#else
+            Node_FromStr(&p,Path,TSIZEOF(Path),argv[++i]);
+#endif
+            if (tcsisame_ascii(Path,T("0")))
+                CompressionAlgo = MATROSKA_TRACK_ENCODING_COMP_ZLIB;
+            else if (tcsisame_ascii(Path,T("4")))
+                CompressionAlgo = MATROSKA_TRACK_ENCODING_COMP_ZSTD;
+            else
+            {
+                TextPrintf(StdErr,T("Unknown compression algorithm %s (0: zlib, 4: Zstd)\r\n"),Path);
+                Path[0] = 0;
+                Result = -8;
+                goto exit;
+            }
+            InputPathIndex = i+1;
+        }
         else if (tcsisame_ascii(Path,T("--regression"))) { Regression = 1; InputPathIndex = i+1; }
         else if (tcsisame_ascii(Path,T("--no-optimize"))) { UnOptimize = 1; InputPathIndex = i+1; }
         else if (tcsisame_ascii(Path,T("--quiet"))) { Quiet = 1; InputPathIndex = i+1; }
@@ -1650,6 +1671,7 @@ int main(int argc, const char *argv[])
             TextWrite(StdErr,T("  --live        the output file resembles a live stream\r\n"));
             TextWrite(StdErr,T("  --timecodescale <v> force the global TimestampScale to <v> (1000000 is a good value)\r\n"));
             TextWrite(StdErr,T("  --unsafe      don't output elements that are used for file recovery (saves more space)\r\n"));
+            TextWrite(StdErr,T("  --compalgo <v> force compression algorithm of all tracks\r\n"));
             TextWrite(StdErr,T("  --optimize    use all possible optimization for the output file\r\n"));
             TextWrite(StdErr,T("  --optimize_nv use all possible optimization for the output file, except video tracks\r\n"));
             TextWrite(StdErr,T("  --no-optimize disable some optimization for the output file\r\n"));
@@ -2809,13 +2831,24 @@ int main(int argc, const char *argv[])
                     if (CodecPrivate!=NULL)
                     {
                         size_t ExtraCompHeaderBytes = (encoding == MATROSKA_TRACK_ENCODING_COMP_NONE) ? 13 : 3; // extra bytes needed to add the comp header to the track
+                        if (CompressionAlgo != MATROSKA_TRACK_ENCODING_COMP_ZLIB)
+                            ExtraCompHeaderBytes += 1; // extra for the non default algo
                         size_t CompressedSize = (size_t)EBML_ElementDataSize((ebml_element*)CodecPrivate, 1);
                         size_t origCompressedSize = CompressedSize;
                         uint8_t *Compressed = malloc(CompressedSize);
-                        if (CompressFrameZLib(EBML_BinaryGetData(CodecPrivate), origCompressedSize, &Compressed, &CompressedSize)==ERR_NONE
-                            && (CompressedSize + ExtraCompHeaderBytes) < origCompressedSize)
+                        uint8_t *NewCompressed = Compressed;
+                        int comp_err;
+                        if (CompressionAlgo == MATROSKA_TRACK_ENCODING_COMP_ZSTD)
+                        {
+                            comp_err = CompressFrameZstd(EBML_BinaryGetData(CodecPrivate), origCompressedSize, &NewCompressed, &CompressedSize);
+                        }
+                        else
                         {
-                            encoding = MATROSKA_TRACK_ENCODING_COMP_ZLIB;
+                            comp_err = CompressFrameZLib(EBML_BinaryGetData(CodecPrivate), origCompressedSize, &NewCompressed, &CompressedSize);
+                        }
+                        if (comp_err==ERR_NONE && (CompressedSize + ExtraCompHeaderBytes) < origCompressedSize)
+                        {
+                            encoding = CompressionAlgo;
                             compress_scope |= MATROSKA_CONTENTENCODINGSCOPE_PRIVATE;
                         }
                         free(Compressed);
@@ -2830,6 +2863,12 @@ int main(int argc, const char *argv[])
                     if (MATROSKA_TrackSetCompressionAlgo((matroska_trackentry*)RLevel1, compress_scope,DstProfile, MATROSKA_TRACK_ENCODING_COMP_ZLIB))
                         ClustersNeedRead = 1;
                     break;
+#if defined(CONFIG_ZSTD)
+                case MATROSKA_TRACK_ENCODING_COMP_ZSTD:
+                    if (MATROSKA_TrackSetCompressionAlgo((matroska_trackentry*)RLevel1, compress_scope,DstProfile, MATROSKA_TRACK_ENCODING_COMP_ZSTD))
+                        ClustersNeedRead = 1;
+                    break;
+#endif
                 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
                     if (!HeaderData || MATROSKA_TrackSetCompressionHeader((matroska_trackentry*)RLevel1, ARRAYBEGIN(*HeaderData,uint8_t), ARRAYCOUNT(*HeaderData,uint8_t), DstProfile))
                         ClustersNeedRead = 1;