2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
10 #include "EbmlWriter.h"
16 #define LITERALU64(n) n
18 #define LITERALU64(n) n##LLU
21 void Ebml_WriteLen(EbmlGlobal *glob, int64_t val) {
22 /* TODO check and make sure we are not > than 0x0100000000000000LLU */
23 unsigned char size = 8; /* size in bytes to output */
25 /* mask to compare for byte size */
26 int64_t minVal = 0xff;
28 for (size = 1; size < 8; size ++) {
32 minVal = (minVal << 7);
35 val |= (((uint64_t)0x80) << ((size - 1) * 7));
37 Ebml_Serialize(glob, (void *) &val, sizeof(val), size);
40 void Ebml_WriteString(EbmlGlobal *glob, const char *str) {
41 const size_t size_ = strlen(str);
42 const uint64_t size = size_;
43 Ebml_WriteLen(glob, size);
44 /* TODO: it's not clear from the spec whether the nul terminator
45 * should be serialized too. For now we omit the null terminator.
47 Ebml_Write(glob, str, (unsigned long)size);
50 void Ebml_WriteUTF8(EbmlGlobal *glob, const wchar_t *wstr) {
51 const size_t strlen = wcslen(wstr);
53 /* TODO: it's not clear from the spec whether the nul terminator
54 * should be serialized too. For now we include it.
56 const uint64_t size = strlen;
58 Ebml_WriteLen(glob, size);
59 Ebml_Write(glob, wstr, (unsigned long)size);
62 void Ebml_WriteID(EbmlGlobal *glob, unsigned long class_id) {
65 if (class_id >= 0x01000000)
67 else if (class_id >= 0x00010000)
69 else if (class_id >= 0x00000100)
74 Ebml_Serialize(glob, (void *)&class_id, sizeof(class_id), len);
77 void Ebml_SerializeUnsigned64(EbmlGlobal *glob, unsigned long class_id, uint64_t ui) {
78 unsigned char sizeSerialized = 8 | 0x80;
79 Ebml_WriteID(glob, class_id);
80 Ebml_Serialize(glob, &sizeSerialized, sizeof(sizeSerialized), 1);
81 Ebml_Serialize(glob, &ui, sizeof(ui), 8);
84 void Ebml_SerializeUnsigned(EbmlGlobal *glob, unsigned long class_id, unsigned long ui) {
85 unsigned char size = 8; /* size in bytes to output */
86 unsigned char sizeSerialized = 0;
89 Ebml_WriteID(glob, class_id);
90 minVal = 0x7fLU; /* mask to compare for byte size */
92 for (size = 1; size < 4; size ++) {
100 sizeSerialized = 0x80 | size;
101 Ebml_Serialize(glob, &sizeSerialized, sizeof(sizeSerialized), 1);
102 Ebml_Serialize(glob, &ui, sizeof(ui), size);
104 /* TODO: perhaps this is a poor name for this id serializer helper function */
105 void Ebml_SerializeBinary(EbmlGlobal *glob, unsigned long class_id, unsigned long bin) {
107 for (size = 4; size > 1; size--) {
108 if (bin & (unsigned int)0x000000ff << ((size - 1) * 8))
111 Ebml_WriteID(glob, class_id);
112 Ebml_WriteLen(glob, size);
113 Ebml_WriteID(glob, bin);
116 void Ebml_SerializeFloat(EbmlGlobal *glob, unsigned long class_id, double d) {
117 unsigned char len = 0x88;
119 Ebml_WriteID(glob, class_id);
120 Ebml_Serialize(glob, &len, sizeof(len), 1);
121 Ebml_Serialize(glob, &d, sizeof(d), 8);
124 void Ebml_WriteSigned16(EbmlGlobal *glob, short val) {
125 signed long out = ((val & 0x003FFFFF) | 0x00200000) << 8;
126 Ebml_Serialize(glob, &out, sizeof(out), 3);
129 void Ebml_SerializeString(EbmlGlobal *glob, unsigned long class_id, const char *s) {
130 Ebml_WriteID(glob, class_id);
131 Ebml_WriteString(glob, s);
134 void Ebml_SerializeUTF8(EbmlGlobal *glob, unsigned long class_id, wchar_t *s) {
135 Ebml_WriteID(glob, class_id);
136 Ebml_WriteUTF8(glob, s);
139 void Ebml_SerializeData(EbmlGlobal *glob, unsigned long class_id, unsigned char *data, unsigned long data_length) {
140 Ebml_WriteID(glob, class_id);
141 Ebml_WriteLen(glob, data_length);
142 Ebml_Write(glob, data, data_length);
145 void Ebml_WriteVoid(EbmlGlobal *glob, unsigned long vSize) {
146 unsigned char tmp = 0;
149 Ebml_WriteID(glob, 0xEC);
150 Ebml_WriteLen(glob, vSize);
152 for (i = 0; i < vSize; i++) {
153 Ebml_Write(glob, &tmp, 1);
157 /* TODO Serialize Date */