93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
/** \file atom_ohdr.cpp
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\author Danijel Kopcinovic (danijel.kopcinovic@adnecto.net)
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*/
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#include "mp4common.h"
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/*! \brief Patch class for read/write operations when string is 0-length.
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We want to use string property, but mpeg4ip doesn't support ohdr way of
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encoding of string (in ohdr atom we first have 3 lengths of 3 strings and
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then their string values, and it cannot be simulated with any of the
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current mpeg4ip string property parameters), so we have to write our own
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Read() and Write() routines.
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*/
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class OhdrMP4StringProperty: public MP4StringProperty {
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public:
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/*! \brief Constructor.
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\param name name of the property.
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\param useCountedFormat counted format flag.
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\param useUnicode unicode flag.
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*/
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OhdrMP4StringProperty(char* name, bool useCountedFormat = false,
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bool useUnicode = false): MP4StringProperty(name, useCountedFormat,
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useUnicode) {
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}
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/*! \brief Read property from file.
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\param pFile input, file handle.
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\param index input, index to read.
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*/
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void Read(MP4File* pFile, u_int32_t index = 0) {
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MP4Free(m_values[index]);
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m_values[index] = (char*)MP4Calloc(m_fixedLength + 1);
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(void)pFile->ReadBytes((u_int8_t*)m_values[index], m_fixedLength);
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}
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/*! \brief Write property to file.
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\param pFile input, file handle.
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\param index input, index to write.
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*/
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void Write(MP4File* pFile, u_int32_t index = 0) {
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pFile->WriteBytes((u_int8_t*)m_values[index], m_fixedLength);
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}
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};
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/*! \brief OMA DRM headers atom.
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Contained in OMA DRM key management atom. It must contain content identifier.
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*/
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/*! \brief Constructor.
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*/
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MP4OhdrAtom::MP4OhdrAtom(): MP4Atom("ohdr") {
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AddVersionAndFlags();
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AddProperty(new MP4Integer8Property("EncryptionMethod"));
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AddProperty(new MP4Integer8Property("EncryptionPadding"));
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AddProperty(new MP4Integer64Property("PlaintextLength"));
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AddProperty(new MP4Integer16Property("ContentIDLength"));
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AddProperty(new MP4Integer16Property("RightsIssuerURLLength"));
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AddProperty(new MP4Integer16Property("TextualHeadersLength"));
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AddProperty(new OhdrMP4StringProperty("ContentID"));
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AddProperty(new OhdrMP4StringProperty("RightsIssuerURL"));
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AddProperty(new MP4BytesProperty("TextualHeaders"));
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}
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MP4OhdrAtom::~MP4OhdrAtom() {
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}
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/*! \brief Read atom.
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*/
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void MP4OhdrAtom::Read() {
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ReadProperties(0, 8);
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MP4Property* lProperty;
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MP4Property* property;
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lProperty = GetProperty(5);
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property = GetProperty(8);
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((OhdrMP4StringProperty*)property)->SetFixedLength(
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((MP4Integer16Property*)lProperty)->GetValue());
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lProperty = GetProperty(6);
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property = GetProperty(9);
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((OhdrMP4StringProperty*)property)->SetFixedLength(
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((MP4Integer16Property*)lProperty)->GetValue());
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lProperty = GetProperty(7);
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property = GetProperty(10);
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((MP4BytesProperty*)property)->SetFixedSize(
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((MP4Integer16Property*)lProperty)->GetValue());
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ReadProperties(8, 3);
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}
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