Index: source/libvpx/third_party/libmkv/EbmlWriter.c |
=================================================================== |
--- source/libvpx/third_party/libmkv/EbmlWriter.c (revision 0) |
+++ source/libvpx/third_party/libmkv/EbmlWriter.c (revision 0) |
@@ -0,0 +1,157 @@ |
+/* |
+ * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
+ * |
+ * Use of this source code is governed by a BSD-style license |
+ * that can be found in the LICENSE file in the root of the source |
+ * tree. An additional intellectual property rights grant can be found |
+ * in the file PATENTS. All contributing project authors may |
+ * be found in the AUTHORS file in the root of the source tree. |
+ */ |
+#include "EbmlWriter.h" |
+#include <stdlib.h> |
+#include <wchar.h> |
+#include <string.h> |
+#include <limits.h> |
+#if defined(_MSC_VER) |
+#define LITERALU64(n) n |
+#else |
+#define LITERALU64(n) n##LLU |
+#endif |
+ |
+void Ebml_WriteLen(EbmlGlobal *glob, int64_t val) { |
+ /* TODO check and make sure we are not > than 0x0100000000000000LLU */ |
+ unsigned char size = 8; /* size in bytes to output */ |
+ |
+ /* mask to compare for byte size */ |
+ int64_t minVal = 0xff; |
+ |
+ for (size = 1; size < 8; size ++) { |
+ if (val < minVal) |
+ break; |
+ |
+ minVal = (minVal << 7); |
+ } |
+ |
+ val |= (((uint64_t)0x80) << ((size - 1) * 7)); |
+ |
+ Ebml_Serialize(glob, (void *) &val, sizeof(val), size); |
+} |
+ |
+void Ebml_WriteString(EbmlGlobal *glob, const char *str) { |
+ const size_t size_ = strlen(str); |
+ const uint64_t size = size_; |
+ Ebml_WriteLen(glob, size); |
+ /* TODO: it's not clear from the spec whether the nul terminator |
+ * should be serialized too. For now we omit the null terminator. |
+ */ |
+ Ebml_Write(glob, str, (unsigned long)size); |
+} |
+ |
+void Ebml_WriteUTF8(EbmlGlobal *glob, const wchar_t *wstr) { |
+ const size_t strlen = wcslen(wstr); |
+ |
+ /* TODO: it's not clear from the spec whether the nul terminator |
+ * should be serialized too. For now we include it. |
+ */ |
+ const uint64_t size = strlen; |
+ |
+ Ebml_WriteLen(glob, size); |
+ Ebml_Write(glob, wstr, (unsigned long)size); |
+} |
+ |
+void Ebml_WriteID(EbmlGlobal *glob, unsigned long class_id) { |
+ int len; |
+ |
+ if (class_id >= 0x01000000) |
+ len = 4; |
+ else if (class_id >= 0x00010000) |
+ len = 3; |
+ else if (class_id >= 0x00000100) |
+ len = 2; |
+ else |
+ len = 1; |
+ |
+ Ebml_Serialize(glob, (void *)&class_id, sizeof(class_id), len); |
+} |
+ |
+void Ebml_SerializeUnsigned64(EbmlGlobal *glob, unsigned long class_id, uint64_t ui) { |
+ unsigned char sizeSerialized = 8 | 0x80; |
+ Ebml_WriteID(glob, class_id); |
+ Ebml_Serialize(glob, &sizeSerialized, sizeof(sizeSerialized), 1); |
+ Ebml_Serialize(glob, &ui, sizeof(ui), 8); |
+} |
+ |
+void Ebml_SerializeUnsigned(EbmlGlobal *glob, unsigned long class_id, unsigned long ui) { |
+ unsigned char size = 8; /* size in bytes to output */ |
+ unsigned char sizeSerialized = 0; |
+ unsigned long minVal; |
+ |
+ Ebml_WriteID(glob, class_id); |
+ minVal = 0x7fLU; /* mask to compare for byte size */ |
+ |
+ for (size = 1; size < 4; size ++) { |
+ if (ui < minVal) { |
+ break; |
+ } |
+ |
+ minVal <<= 7; |
+ } |
+ |
+ sizeSerialized = 0x80 | size; |
+ Ebml_Serialize(glob, &sizeSerialized, sizeof(sizeSerialized), 1); |
+ Ebml_Serialize(glob, &ui, sizeof(ui), size); |
+} |
+/* TODO: perhaps this is a poor name for this id serializer helper function */ |
+void Ebml_SerializeBinary(EbmlGlobal *glob, unsigned long class_id, unsigned long bin) { |
+ int size; |
+ for (size = 4; size > 1; size--) { |
+ if (bin & (unsigned int)0x000000ff << ((size - 1) * 8)) |
+ break; |
+ } |
+ Ebml_WriteID(glob, class_id); |
+ Ebml_WriteLen(glob, size); |
+ Ebml_WriteID(glob, bin); |
+} |
+ |
+void Ebml_SerializeFloat(EbmlGlobal *glob, unsigned long class_id, double d) { |
+ unsigned char len = 0x88; |
+ |
+ Ebml_WriteID(glob, class_id); |
+ Ebml_Serialize(glob, &len, sizeof(len), 1); |
+ Ebml_Serialize(glob, &d, sizeof(d), 8); |
+} |
+ |
+void Ebml_WriteSigned16(EbmlGlobal *glob, short val) { |
+ signed long out = ((val & 0x003FFFFF) | 0x00200000) << 8; |
+ Ebml_Serialize(glob, &out, sizeof(out), 3); |
+} |
+ |
+void Ebml_SerializeString(EbmlGlobal *glob, unsigned long class_id, const char *s) { |
+ Ebml_WriteID(glob, class_id); |
+ Ebml_WriteString(glob, s); |
+} |
+ |
+void Ebml_SerializeUTF8(EbmlGlobal *glob, unsigned long class_id, wchar_t *s) { |
+ Ebml_WriteID(glob, class_id); |
+ Ebml_WriteUTF8(glob, s); |
+} |
+ |
+void Ebml_SerializeData(EbmlGlobal *glob, unsigned long class_id, unsigned char *data, unsigned long data_length) { |
+ Ebml_WriteID(glob, class_id); |
+ Ebml_WriteLen(glob, data_length); |
+ Ebml_Write(glob, data, data_length); |
+} |
+ |
+void Ebml_WriteVoid(EbmlGlobal *glob, unsigned long vSize) { |
+ unsigned char tmp = 0; |
+ unsigned long i = 0; |
+ |
+ Ebml_WriteID(glob, 0xEC); |
+ Ebml_WriteLen(glob, vSize); |
+ |
+ for (i = 0; i < vSize; i++) { |
+ Ebml_Write(glob, &tmp, 1); |
+ } |
+} |
+ |
+/* TODO Serialize Date */ |