mp4property.cpp

AAC编解码源码

/*
 * 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"

MP4Property::MP4Property(const char* name)
{
	m_name = name;
	m_pParentAtom = NULL;
	m_readOnly = false;
	m_implicit = false;
}

bool MP4Property::FindProperty(const char* name, 
	MP4Property** ppProperty, u_int32_t* pIndex) 
{
	if (name == NULL) {
		return false;
	}

	if (!strcasecmp(m_name, name)) {
		if (m_pParentAtom) {
			VERBOSE_FIND(m_pParentAtom->GetFile()->GetVerbosity(),
				printf("FindProperty: matched %s\n", name));
		}

		*ppProperty = this;
		return true;
	}
	return false;
}

// Integer Property

u_int64_t MP4IntegerProperty::GetValue(u_int32_t index)
{
	switch (this->GetType()) {
	case Integer8Property:
		return ((MP4Integer8Property*)this)->GetValue(index);
	case Integer16Property:
		return ((MP4Integer16Property*)this)->GetValue(index);
	case Integer24Property:
		return ((MP4Integer24Property*)this)->GetValue(index);
	case Integer32Property:
		return ((MP4Integer32Property*)this)->GetValue(index);
	case Integer64Property:
		return ((MP4Integer64Property*)this)->GetValue(index);
	default:
		ASSERT(FALSE);
	}
	return (0);
}

void MP4IntegerProperty::SetValue(u_int64_t value, u_int32_t index)
{
	switch (this->GetType()) {
	case Integer8Property:
		((MP4Integer8Property*)this)->SetValue(value, index);
		break;
	case Integer16Property:
		((MP4Integer16Property*)this)->SetValue(value, index);
		break;
	case Integer24Property:
		((MP4Integer24Property*)this)->SetValue(value, index);
		break;
	case Integer32Property:
		((MP4Integer32Property*)this)->SetValue(value, index);
		break;
	case Integer64Property:
		((MP4Integer64Property*)this)->SetValue(value, index);
		break;
	default:
		ASSERT(FALSE);
	}
}

void MP4IntegerProperty::InsertValue(u_int64_t value, u_int32_t index)
{
	switch (this->GetType()) {
	case Integer8Property:
		((MP4Integer8Property*)this)->InsertValue(value, index);
		break;
	case Integer16Property:
		((MP4Integer16Property*)this)->InsertValue(value, index);
		break;
	case Integer24Property:
		((MP4Integer24Property*)this)->InsertValue(value, index);
		break;
	case Integer32Property:
		((MP4Integer32Property*)this)->InsertValue(value, index);
		break;
	case Integer64Property:
		((MP4Integer64Property*)this)->InsertValue(value, index);
		break;
	default:
		ASSERT(FALSE);
	}
}

void MP4IntegerProperty::DeleteValue(u_int32_t index)
{
	switch (this->GetType()) {
	case Integer8Property:
		((MP4Integer8Property*)this)->DeleteValue(index);
		break;
	case Integer16Property:
		((MP4Integer16Property*)this)->DeleteValue(index);
		break;
	case Integer24Property:
		((MP4Integer24Property*)this)->DeleteValue(index);
		break;
	case Integer32Property:
		((MP4Integer32Property*)this)->DeleteValue(index);
		break;
	case Integer64Property:
		((MP4Integer64Property*)this)->DeleteValue(index);
		break;
	default:
		ASSERT(FALSE);
	}
}

void MP4IntegerProperty::IncrementValue(int32_t increment, u_int32_t index)
{
	SetValue(GetValue() + increment);
}

void MP4Integer8Property::Dump(FILE* pFile, u_int8_t indent,
	bool dumpImplicits, u_int32_t index)
{
	if (m_implicit && !dumpImplicits) {
		return;
	}
	Indent(pFile, indent);
	fprintf(pFile, "%s = %u (0x%02x)\n", 
		m_name, m_values[index], m_values[index]);
}

void MP4Integer16Property::Dump(FILE* pFile, u_int8_t indent,
	bool dumpImplicits, u_int32_t index)
{
	if (m_implicit && !dumpImplicits) {
		return;
	}
	Indent(pFile, indent);
	fprintf(pFile, "%s = %u (0x%04x)\n", 
		m_name, m_values[index], m_values[index]);
}

void MP4Integer24Property::Dump(FILE* pFile, u_int8_t indent,
	bool dumpImplicits, u_int32_t index)
{
	if (m_implicit && !dumpImplicits) {
		return;
	}
	Indent(pFile, indent);
	fprintf(pFile, "%s = %u (0x%06x)\n", 
		m_name, m_values[index], m_values[index]);
}

void MP4Integer32Property::Dump(FILE* pFile, u_int8_t indent,
	bool dumpImplicits, u_int32_t index)
{
	if (m_implicit && !dumpImplicits) {
		return;
	}
	Indent(pFile, indent);
	fprintf(pFile, "%s = %u (0x%08x)\n", 
		m_name, m_values[index], m_values[index]);
}

void MP4Integer64Property::Dump(FILE* pFile, u_int8_t indent,
	bool dumpImplicits, u_int32_t index)
{
	if (m_implicit && !dumpImplicits) {
		return;
	}
	Indent(pFile, indent);
	fprintf(pFile, 
#ifdef _WIN32
		"%s = "LLU" (0x%016I64x)\n", 
#else
		"%s = "LLU" (0x%016llx)\n", 
#endif
		m_name, m_values[index], m_values[index]);
}

// MP4BitfieldProperty

void MP4BitfieldProperty::Read(MP4File* pFile, u_int32_t index)
{
	if (m_implicit) {
		return;
	}
	m_values[index] = pFile->ReadBits(m_numBits);
}

void MP4BitfieldProperty::Write(MP4File* pFile, u_int32_t index)
{
	if (m_implicit) {
		return;
	}
	pFile->WriteBits(m_values[index], m_numBits);
}

void MP4BitfieldProperty::Dump(FILE* pFile, u_int8_t indent,
	bool dumpImplicits, u_int32_t index)
{
	if (m_implicit && !dumpImplicits) {
		return;
	}
	Indent(pFile, indent);

	u_int8_t hexWidth = m_numBits / 4;
	if (hexWidth == 0 || (m_numBits % 4)) {
		hexWidth++;
	}
	fprintf(pFile, 
#ifdef _WIN32
		"%s = "LLU" (0x%0*I64x) <%u bits>\n", 
#else
		"%s = "LLU" (0x%0*llx) <%u bits>\n", 
#endif
		m_name, m_values[index], (int)hexWidth, m_values[index], m_numBits);
}

// MP4Float32Property

void MP4Float32Property::Read(MP4File* pFile, u_int32_t index) 
{
	if (m_implicit) {
		return;
	}
	if (m_useFixed16Format) {
		m_values[index] = pFile->ReadFixed16();
	} else if (m_useFixed32Format) {
		m_values[index] = pFile->ReadFixed32();
	} else {
		m_values[index] = pFile->ReadFloat();
	}
}

void MP4Float32Property::Write(MP4File* pFile, u_int32_t index) 
{
	if (m_implicit) {
		return;
	}
	if (m_useFixed16Format) {
		pFile->WriteFixed16(m_values[index]);
	} else if (m_useFixed32Format) {
		pFile->WriteFixed32(m_values[index]);
	} else {
		pFile->WriteFloat(m_values[index]);
	}
}

void MP4Float32Property::Dump(FILE* pFile, u_int8_t indent,
	bool dumpImplicits, u_int32_t index)
{
	if (m_implicit && !dumpImplicits) {
		return;
	}
	Indent(pFile, indent);
	fprintf(pFile, "%s = %f\n", 
		m_name, m_values[index]);
}

// MP4StringProperty

MP4StringProperty::MP4StringProperty(char* name, 
	bool useCountedFormat, bool useUnicode)
	: MP4Property(name)
{
	SetCount(1);
	m_values[0] = NULL;
	m_useCountedFormat = useCountedFormat;
	m_useExpandedCount = false;
	m_useUnicode = useUnicode;
	m_fixedLength = 0;	// length not fixed
}

MP4StringProperty::~MP4StringProperty() 
{
	u_int32_t count = GetCount();
	for (u_int32_t i = 0; i < count; i++) {
		MP4Free(m_values[i]);
	}
}

void MP4StringProperty::SetCount(u_int32_t count) 
{
	u_int32_t oldCount = m_values.Size();

	m_values.Resize(count);

	for (u_int32_t i = oldCount; i < count; i++) {
		m_values[i] = NULL;
	}
}

void MP4StringProperty::SetValue(const char* value, u_int32_t index) 
{
	if (m_readOnly) {
		throw new MP4Error(EACCES, "property is read-only", m_name);
	}

	MP4Free(m_values[index]);

	if (m_fixedLength) {
		m_values[index] = (char*)MP4Calloc(m_fixedLength + 1);
		if (value) {
			strncpy(m_values[index], value, m_fixedLength);
		}
	} else {
		if (value) {
			m_values[index] = MP4Stralloc(value);
		} else {
			m_values[index] = NULL;
		}
	}
}

void MP4StringProperty::Read(MP4File* pFile, u_int32_t index)
{
	if (m_implicit) {
		return;
	}
	if (m_useCountedFormat) {
		m_values[index] = pFile->ReadCountedString(
			(m_useUnicode ? 2 : 1), m_useExpandedCount);
	} else if (m_fixedLength) {
		MP4Free(m_values[index]);
		m_values[index] = (char*)MP4Calloc(m_fixedLength + 1);
		pFile->ReadBytes((u_int8_t*)m_values[index], m_fixedLength);
	} else {
		m_values[index] = pFile->ReadString();
	}
}

void MP4StringProperty::Write(MP4File* pFile, u_int32_t index)
{
	if (m_implicit) {
		return;
	}
	if (m_useCountedFormat) {
		pFile->WriteCountedString(m_values[index],
			(m_useUnicode ? 2 : 1), m_useExpandedCount);
	} else if (m_fixedLength) {
		pFile->WriteBytes((u_int8_t*)m_values[index], m_fixedLength);
	} else {
		pFile->WriteString(m_values[index]);
	}
}

void MP4StringProperty::Dump(FILE* pFile, u_int8_t indent,
	bool dumpImplicits, u_int32_t index)
{
	if (m_implicit && !dumpImplicits) {
		return;
	}
	Indent(pFile, indent);
	if (m_useUnicode) {
		fprintf(pFile, "%s = %ls\n", m_name, (wchar_t*)m_values[index]);
	} else {
		fprintf(pFile, "%s = %s\n", m_name, m_values[index]);
	}
}

// MP4BytesProperty

MP4BytesProperty::MP4BytesProperty(char* name, u_int32_t valueSize)
	: MP4Property(name)
{
	SetCount(1);
	m_values[0] = (u_int8_t*)MP4Calloc(valueSize);
	m_valueSizes[0] = valueSize;
	m_fixedValueSize = 0;
}

MP4BytesProperty::~MP4BytesProperty() 
{
	u_int32_t count = GetCount();
	for (u_int32_t i = 0; i < count; i++) {
		MP4Free(m_values[i]);
	}
}
  
void MP4BytesProperty::SetCount(u_int32_t count) 
{
	u_int32_t oldCount = m_values.Size();

	m_values.Resize(count);
	m_valueSizes.Resize(count);

	for (u_int32_t i = oldCount; i < count; i++) {
		m_values[i] = NULL;
		m_valueSizes[i] = 0;
	}
}

void MP4BytesProperty::SetValue(const u_int8_t* pValue, u_int32_t valueSize, 
	u_int32_t index) 
{
	if (m_readOnly) {
		throw new MP4Error(EACCES, "property is read-only", m_name);
	}
	if (m_fixedValueSize) {
		if (valueSize > m_fixedValueSize) {
			throw new MP4Error("value size exceeds fixed value size",
				"MP4BytesProperty::SetValue");
		}
		if (m_values[index] == NULL) {
			m_values[index] = (u_int8_t*)MP4Calloc(m_fixedValueSize);
			m_valueSizes[index] = m_fixedValueSize;
		}
		if (pValue) {
			memcpy(m_values[index], pValue, valueSize);
		}
	} else {
		MP4Free(m_values[index]);