91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
#include "mov-internal.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <errno.h>
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// Table 1 - List of Class Tags for Descriptors (p31)
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/*
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0x10 MP4_IOD_Tag
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0x11 MP4_OD_Tag
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*/
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// 7.2.2.2 BaseDescriptor (p32)
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/*
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abstract aligned(8) expandable(2^28-1) class BaseDescriptor : bit(8) tag=0 {
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// empty. To be filled by classes extending this class.
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}
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*/
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// 7.2.6.2 ObjectDescriptorBase (p42)
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/*
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abstract class ObjectDescriptorBase extends BaseDescriptor : bit(8)
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tag=[ObjectDescrTag..InitialObjectDescrTag] {
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// empty. To be filled by classes extending this class.
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}
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class ObjectDescriptor extends ObjectDescriptorBase : bit(8) tag=ObjectDescrTag {
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bit(10) ObjectDescriptorID;
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bit(1) URL_Flag;
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const bit(5) reserved=0b1111.1;
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if (URL_Flag) {
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bit(8) URLlength;
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bit(8) URLstring[URLlength];
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} else {
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ES_Descriptor esDescr[1 .. 255];
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OCI_Descriptor ociDescr[0 .. 255];
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IPMP_DescriptorPointer ipmpDescrPtr[0 .. 255];
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IPMP_Descriptor ipmpDescr [0 .. 255];
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}
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ExtensionDescriptor extDescr[0 .. 255];
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}
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*/
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// 7.2.6.4 InitialObjectDescriptor (p44)
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/*
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class InitialObjectDescriptor extends ObjectDescriptorBase : bit(8)
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tag=InitialObjectDescrTag {
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bit(10) ObjectDescriptorID;
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bit(1) URL_Flag;
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bit(1) includeInlineProfileLevelFlag;
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const bit(4) reserved=0b1111;
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if (URL_Flag) {
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bit(8) URLlength;
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bit(8) URLstring[URLlength];
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} else {
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bit(8) ODProfileLevelIndication;
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bit(8) sceneProfileLevelIndication;
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bit(8) audioProfileLevelIndication;
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bit(8) visualProfileLevelIndication;
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bit(8) graphicsProfileLevelIndication;
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ES_Descriptor esDescr[1 .. 255];
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OCI_Descriptor ociDescr[0 .. 255];
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IPMP_DescriptorPointer ipmpDescrPtr[0 .. 255];
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IPMP_Descriptor ipmpDescr [0 .. 255];
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IPMP_ToolListDescriptor toolListDescr[0 .. 1];
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}
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ExtensionDescriptor extDescr[0 .. 255];
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}
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*/
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size_t mov_write_iods(const struct mov_t* mov)
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{
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size_t size = 12 /* full box */ + 12 /* InitialObjectDescriptor */;
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mov_buffer_w32(&mov->io, 24); /* size */
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mov_buffer_write(&mov->io, "iods", 4);
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mov_buffer_w32(&mov->io, 0); /* version & flags */
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mov_buffer_w8(&mov->io, 0x10); // ISO_MP4_IOD_Tag
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mov_buffer_w8(&mov->io, (uint8_t)(0x80 | (7 >> 21)));
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mov_buffer_w8(&mov->io, (uint8_t)(0x80 | (7 >> 14)));
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mov_buffer_w8(&mov->io, (uint8_t)(0x80 | (7 >> 7)));
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mov_buffer_w8(&mov->io, (uint8_t)(0x7F & 7));
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mov_buffer_w16(&mov->io, 0x004f); // objectDescriptorId 1
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mov_buffer_w8(&mov->io, 0xff); // No OD capability required
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mov_buffer_w8(&mov->io, 0xff);
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mov_buffer_w8(&mov->io, 0xFF);
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mov_buffer_w8(&mov->io, 0xFF); // no visual capability required
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mov_buffer_w8(&mov->io, 0xff);
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return size;
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}
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