ocidescriptors.cpp

6410BSP1

/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is MPEG4IP.
 * 
 * The Initial Developer of the Original Code is Cisco Systems Inc.
 * Portions created by Cisco Systems Inc. are
 * Copyright (C) Cisco Systems Inc. 2001.  All Rights Reserved.
 * 
 * Contributor(s): 
 *        Dave Mackie        [e-mail]
 */

#include "mp4common.h"

MP4ContentClassDescriptor::MP4ContentClassDescriptor()
    : MP4Descriptor()
{
    AddProperty( /* 0 */
        new MP4Integer32Property("classificationEntity"));
    AddProperty( /* 1 */
        new MP4Integer16Property("classificationTable"));
    AddProperty( /* 2 */
        new MP4BytesProperty("contentClassificationData"));
}

void MP4ContentClassDescriptor::Read(MP4File* pFile)
{
    ReadHeader(pFile);

    /* byte properties need to know how long they are before reading */
    ((MP4BytesProperty*)m_pProperties[2])->SetValueSize(m_size - 6);

    ReadProperties(pFile);
}

MP4KeywordDescriptor::MP4KeywordDescriptor()
    : MP4Descriptor()
{
    AddProperty( /* 0 */
        new MP4BytesProperty("languageCode", 3));
    AddProperty( /* 1 */
        new MP4BitfieldProperty("isUTF8String", 1));
    AddProperty( /* 2 */
        new MP4BitfieldProperty("reserved", 7));
    MP4Integer8Property* pCount = 
        new MP4Integer8Property("keywordCount");
    AddProperty(pCount); /* 3 */

    MP4TableProperty* pTable = new MP4TableProperty("keywords", pCount);
    AddProperty(pTable); /* 4 */

    pTable->AddProperty( /* 4, 0 */
        new MP4StringProperty("string", Counted));

    SetReadMutate(2);
}

void MP4KeywordDescriptor::Mutate()
{
    bool utf8Flag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue();
    MP4Property* pProperty =
        ((MP4TableProperty*)m_pProperties[4])->GetProperty(0);
    ASSERT(pProperty);
    ((MP4StringProperty*)pProperty)->SetUnicode(!utf8Flag);
}

MP4RatingDescriptor::MP4RatingDescriptor()
    : MP4Descriptor()
{
    AddProperty( /* 0 */
        new MP4Integer32Property("ratingEntity"));
    AddProperty( /* 1 */
        new MP4Integer16Property("ratingCriteria"));
    AddProperty( /* 2 */
        new MP4BytesProperty("ratingInfo"));
}

void MP4RatingDescriptor::Read(MP4File* pFile)
{
    ReadHeader(pFile);

    /* byte properties need to know how long they are before reading */
    ((MP4BytesProperty*)m_pProperties[2])->SetValueSize(m_size - 6);

    ReadProperties(pFile);
}

MP4LanguageDescriptor::MP4LanguageDescriptor()
    : MP4Descriptor()
{
    AddProperty( /* 0 */
        new MP4BytesProperty("languageCode", 3));
}

MP4ShortTextDescriptor::MP4ShortTextDescriptor()
    : MP4Descriptor()
{
    AddProperty( /* 0 */
        new MP4BytesProperty("languageCode", 3));
    AddProperty( /* 1 */
        new MP4BitfieldProperty("isUTF8String", 1));
    AddProperty( /* 2 */
        new MP4BitfieldProperty("reserved", 7));
    AddProperty( /* 3 */
        new MP4StringProperty("eventName", Counted));
    AddProperty( /* 4 */
        new MP4StringProperty("eventText", Counted));

    SetReadMutate(2);
}

void MP4ShortTextDescriptor::Mutate()
{
    bool utf8Flag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue();
    ((MP4StringProperty*)m_pProperties[3])->SetUnicode(!utf8Flag);
    ((MP4StringProperty*)m_pProperties[4])->SetUnicode(!utf8Flag);
}

MP4ExpandedTextDescriptor::MP4ExpandedTextDescriptor()
    : MP4Descriptor()
{
    AddProperty( /* 0 */
        new MP4BytesProperty("languageCode", 3));
    AddProperty( /* 1 */
        new MP4BitfieldProperty("isUTF8String", 1));
    AddProperty( /* 2 */
        new MP4BitfieldProperty("reserved", 7));
    MP4Integer8Property* pCount = 
        new MP4Integer8Property("itemCount");
    AddProperty(pCount); /* 3 */

    MP4TableProperty* pTable = new MP4TableProperty("items", pCount);
    AddProperty(pTable); /* 4 */

    pTable->AddProperty( /* Table 0 */
        new MP4StringProperty("itemDescription", Counted));
    pTable->AddProperty( /* Table 1 */
        new MP4StringProperty("itemText", Counted));

    AddProperty( /* 5 */
        new MP4StringProperty("nonItemText"));
    ((MP4StringProperty*)m_pProperties[5])->SetExpandedCountedFormat(true);

    SetReadMutate(2);
}

void MP4ExpandedTextDescriptor::Mutate()
{
    bool utf8Flag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue();

    MP4Property* pProperty =
        ((MP4TableProperty*)m_pProperties[4])->GetProperty(0);
    ASSERT(pProperty);
    ((MP4StringProperty*)pProperty)->SetUnicode(!utf8Flag);

    pProperty = ((MP4TableProperty*)m_pProperties[4])->GetProperty(1);
    ASSERT(pProperty);
    ((MP4StringProperty*)pProperty)->SetUnicode(!utf8Flag);

    ((MP4StringProperty*)m_pProperties[5])->SetUnicode(!utf8Flag);
}

class MP4CreatorTableProperty : public MP4TableProperty {
public:
    MP4CreatorTableProperty(char* name, MP4Integer8Property* pCountProperty) :
        MP4TableProperty(name, pCountProperty) {
    };
protected:
    void ReadEntry(MP4File* pFile, u_int32_t index);
    void WriteEntry(MP4File* pFile, u_int32_t index);
};

MP4CreatorDescriptor::MP4CreatorDescriptor(u_int8_t tag)
    : MP4Descriptor(tag)
{
    MP4Integer8Property* pCount = 
        new MP4Integer8Property("creatorCount");
    AddProperty(pCount); /* 0 */

    MP4TableProperty* pTable = new MP4CreatorTableProperty("creators", pCount);
    AddProperty(pTable); /* 1 */

    pTable->AddProperty( /* Table 0 */
        new MP4BytesProperty("languageCode", 3, 3));
    pTable->AddProperty( /* Table 1 */
        new MP4BitfieldProperty("isUTF8String", 1));
    pTable->AddProperty( /* Table 2 */
        new MP4BitfieldProperty("reserved", 7));
    pTable->AddProperty( /* Table 3 */
        new MP4StringProperty("name", Counted));
}

void MP4CreatorTableProperty::ReadEntry(MP4File* pFile, u_int32_t index)
{
    m_pProperties[0]->Read(pFile, index);
    m_pProperties[1]->Read(pFile, index);

    bool utf8Flag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue(index);
    ((MP4StringProperty*)m_pProperties[3])->SetUnicode(!utf8Flag);

    m_pProperties[2]->Read(pFile, index);
    m_pProperties[3]->Read(pFile, index);
}

void MP4CreatorTableProperty::WriteEntry(MP4File* pFile, u_int32_t index)
{
    bool utf8Flag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue(index);
    ((MP4StringProperty*)m_pProperties[3])->SetUnicode(!utf8Flag);

    MP4TableProperty::WriteEntry(pFile, index);
}

MP4CreationDescriptor::MP4CreationDescriptor(u_int8_t tag)
    : MP4Descriptor(tag)
{
    AddProperty( /* 0 */
        new MP4BitfieldProperty("contentCreationDate", 40));
}

MP4SmpteCameraDescriptor::MP4SmpteCameraDescriptor()
    : MP4Descriptor()
{
    MP4Integer8Property* pCount = 
        new MP4Integer8Property("parameterCount"); 
    AddProperty(pCount);

    MP4TableProperty* pTable = new MP4TableProperty("parameters", pCount);
    AddProperty(pTable);

    pTable->AddProperty(
        new MP4Integer8Property("id"));
    pTable->AddProperty(
        new MP4Integer32Property("value"));
}

MP4UnknownOCIDescriptor::MP4UnknownOCIDescriptor()
    : MP4Descriptor()
{
    AddProperty( /* 0 */
        new MP4BytesProperty("data"));
}

void MP4UnknownOCIDescriptor::Read(MP4File* pFile)
{
    ReadHeader(pFile);

    /* byte properties need to know how long they are before reading */
    ((MP4BytesProperty*)m_pProperties[0])->SetValueSize(m_size);

    ReadProperties(pFile);
}

MP4Descriptor* CreateOCIDescriptor(u_int8_t tag) 
{
    MP4Descriptor* pDescriptor = NULL;

    switch (tag) {
    case MP4ContentClassDescrTag:
        pDescriptor = new MP4ContentClassDescriptor();
        break;
    case MP4KeywordDescrTag:
        pDescriptor = new MP4KeywordDescriptor();
        break;
    case MP4RatingDescrTag:
        pDescriptor = new MP4RatingDescriptor();
        break;
    case MP4LanguageDescrTag:
        pDescriptor = new MP4LanguageDescriptor();
        break;
    case MP4ShortTextDescrTag:
        pDescriptor = new MP4ShortTextDescriptor();
        break;
    case MP4ExpandedTextDescrTag:
        pDescriptor = new MP4ExpandedTextDescriptor();
        break;
    case MP4ContentCreatorDescrTag:
    case MP4OCICreatorDescrTag:
        pDescriptor = new MP4CreatorDescriptor(tag);
        break;
    case MP4ContentCreationDescrTag:
    case MP4OCICreationDescrTag:
        pDescriptor = new MP4CreationDescriptor(tag);
        break;
    case MP4SmpteCameraDescrTag:
        pDescriptor = new MP4SmpteCameraDescriptor();
        break;
    }

    if (pDescriptor == NULL) {
        if (tag >= MP4OCIDescrTagsStart && tag <= MP4OCIDescrTagsEnd) {
            pDescriptor = new MP4UnknownOCIDescriptor();
            pDescriptor->SetTag(tag);
        }
    }

    return pDescriptor;
}