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|
/*****************************************************************
|
| AP4 - hvcC Atoms
|
| Copyright 2002-2014 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4HvccAtom.h"
#include "Ap4AtomFactory.h"
#include "Ap4Utils.h"
#include "Ap4Types.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_HvccAtom)
/*----------------------------------------------------------------------
| AP4_HvccAtom::GetProfileName
+---------------------------------------------------------------------*/
const char*
AP4_HvccAtom::GetProfileName(AP4_UI08 profile_space, AP4_UI08 profile)
{
if (profile_space != 0) {
return NULL;
}
switch (profile) {
case AP4_HEVC_PROFILE_MAIN: return "Main";
case AP4_HEVC_PROFILE_MAIN_10: return "Main 10";
case AP4_HEVC_PROFILE_MAIN_STILL_PICTURE: return "Main Still Picture";
case AP4_HEVC_PROFILE_REXT: return "Rext";
}
return NULL;
}
/*----------------------------------------------------------------------
| AP4_HvccAtom::GetChromaFormatName
+---------------------------------------------------------------------*/
const char*
AP4_HvccAtom::GetChromaFormatName(AP4_UI08 chroma_format)
{
switch (chroma_format) {
case AP4_HEVC_CHROMA_FORMAT_MONOCHROME: return "Monochrome";
case AP4_HEVC_CHROMA_FORMAT_420: return "4:2:0";
case AP4_HEVC_CHROMA_FORMAT_422: return "4:2:2";
case AP4_HEVC_CHROMA_FORMAT_444: return "4:4:4";
}
return NULL;
}
/*----------------------------------------------------------------------
| AP4_AvccAtom::Create
+---------------------------------------------------------------------*/
AP4_HvccAtom*
AP4_HvccAtom::Create(AP4_Size size, AP4_ByteStream& stream)
{
// read the raw bytes in a buffer
unsigned int payload_size = size-AP4_ATOM_HEADER_SIZE;
AP4_DataBuffer payload_data(payload_size);
AP4_Result result = stream.Read(payload_data.UseData(), payload_size);
if (AP4_FAILED(result)) return NULL;
return new AP4_HvccAtom(size, payload_data.GetData());
}
/*----------------------------------------------------------------------
| AP4_HvccAtom::AP4_HvccAtom
+---------------------------------------------------------------------*/
AP4_HvccAtom::AP4_HvccAtom() :
AP4_Atom(AP4_ATOM_TYPE_HVCC, AP4_ATOM_HEADER_SIZE),
m_ConfigurationVersion(1),
m_GeneralProfileSpace(0),
m_GeneralTierFlag(0),
m_GeneralProfile(0),
m_GeneralProfileCompatibilityFlags(0),
m_GeneralConstraintIndicatorFlags(0),
m_GeneralLevel(0),
m_Reserved1(0),
m_MinSpatialSegmentation(0),
m_Reserved2(0),
m_ParallelismType(0),
m_Reserved3(0),
m_ChromaFormat(0),
m_Reserved4(0),
m_LumaBitDepth(0),
m_Reserved5(0),
m_ChromaBitDepth(0),
m_AverageFrameRate(0),
m_ConstantFrameRate(0),
m_NumTemporalLayers(0),
m_TemporalIdNested(0),
m_NaluLengthSize(0)
{
UpdateRawBytes();
m_Size32 += m_RawBytes.GetDataSize();
}
/*----------------------------------------------------------------------
| AP4_HvccAtom::AP4_HvccAtom
+---------------------------------------------------------------------*/
AP4_HvccAtom::AP4_HvccAtom(const AP4_HvccAtom& other) :
AP4_Atom(AP4_ATOM_TYPE_HVCC, other.m_Size32),
m_ConfigurationVersion(other.m_ConfigurationVersion),
m_GeneralProfileSpace(other.m_GeneralProfileSpace),
m_GeneralTierFlag(other.m_GeneralTierFlag),
m_GeneralProfile(other.m_GeneralProfile),
m_GeneralProfileCompatibilityFlags(other.m_GeneralProfileCompatibilityFlags),
m_GeneralConstraintIndicatorFlags(other.m_GeneralConstraintIndicatorFlags),
m_GeneralLevel(other.m_GeneralLevel),
m_Reserved1(other.m_Reserved1),
m_MinSpatialSegmentation(other.m_MinSpatialSegmentation),
m_Reserved2(other.m_Reserved2),
m_ParallelismType(other.m_ParallelismType),
m_Reserved3(other.m_Reserved3),
m_ChromaFormat(other.m_ChromaFormat),
m_Reserved4(other.m_Reserved4),
m_LumaBitDepth(other.m_LumaBitDepth),
m_Reserved5(other.m_Reserved5),
m_ChromaBitDepth(other.m_ChromaBitDepth),
m_AverageFrameRate(other.m_AverageFrameRate),
m_ConstantFrameRate(other.m_ConstantFrameRate),
m_NumTemporalLayers(other.m_NumTemporalLayers),
m_TemporalIdNested(other.m_TemporalIdNested),
m_NaluLengthSize(other.m_NaluLengthSize),
m_RawBytes(other.m_RawBytes)
{
// deep copy of the parameters
unsigned int i = 0;
for (i=0; i<other.m_Sequences.ItemCount(); i++) {
m_Sequences.Append(other.m_Sequences[i]);
}
}
/*----------------------------------------------------------------------
| AP4_HvccAtom::AP4_HvccAtom
+---------------------------------------------------------------------*/
AP4_HvccAtom::AP4_HvccAtom(AP4_UI32 size, const AP4_UI08* payload) :
AP4_Atom(AP4_ATOM_TYPE_HVCC, size)
{
// make a copy of our configuration bytes
unsigned int payload_size = size-AP4_ATOM_HEADER_SIZE;
m_RawBytes.SetData(payload, payload_size);
// parse the payload
m_ConfigurationVersion = payload[0];
m_GeneralProfileSpace = (payload[1]>>6) & 0x03;
m_GeneralTierFlag = (payload[1]>>5) & 0x01;
m_GeneralProfile = (payload[1] ) & 0x1F;
m_GeneralProfileCompatibilityFlags = AP4_BytesToUInt32BE(&payload[2]);
m_GeneralConstraintIndicatorFlags = (((AP4_UI64)AP4_BytesToUInt32BE(&payload[6]))<<16) | AP4_BytesToUInt16BE(&payload[10]);
m_GeneralLevel = payload[12];
m_Reserved1 = (payload[13]>>4) & 0x0F;
m_MinSpatialSegmentation = AP4_BytesToUInt16BE(&payload[13]) & 0x0FFF;
m_Reserved2 = (payload[15]>>2) & 0x3F;
m_ParallelismType = payload[15] & 0x03;
m_Reserved3 = (payload[16]>>2) & 0x3F;
m_ChromaFormat = payload[16] & 0x03;
m_Reserved4 = (payload[17]>>3) & 0x1F;
m_LumaBitDepth = 8+(payload[17] & 0x07);
m_Reserved5 = (payload[18]>>3) & 0x1F;
m_ChromaBitDepth = 8+(payload[18] & 0x07);
m_AverageFrameRate = AP4_BytesToUInt16BE(&payload[19]);
m_ConstantFrameRate = (payload[21]>>6) & 0x03;
m_NumTemporalLayers = (payload[21]>>3) & 0x07;
m_TemporalIdNested = (payload[21]>>2) & 0x01;
m_NaluLengthSize = 1+(payload[21] & 0x03);
AP4_UI08 num_seq = payload[22];
m_Sequences.SetItemCount(num_seq);
unsigned int cursor = 23;
for (unsigned int i=0; i<num_seq; i++) {
Sequence& seq = m_Sequences[i];
if (cursor+1 > payload_size) break;
seq.m_ArrayCompleteness = (payload[cursor] >> 7) & 0x01;
seq.m_Reserved = (payload[cursor] >> 6) & 0x01;
seq.m_NaluType = payload[cursor] & 0x3F;
cursor += 1;
if (cursor+2 > payload_size) break;
AP4_UI16 nalu_count = AP4_BytesToUInt16BE(&payload[cursor]);
seq.m_Nalus.SetItemCount(nalu_count);
cursor += 2;
for (unsigned int j=0; j<nalu_count; j++) {
if (cursor+2 > payload_size) break;
unsigned int nalu_length = AP4_BytesToUInt16BE(&payload[cursor]);
cursor += 2;
if (cursor + nalu_length > payload_size) break;
seq.m_Nalus[j].SetData(&payload[cursor], nalu_length);
cursor += nalu_length;
}
}
}
/*----------------------------------------------------------------------
| AP4_HvccAtom::UpdateRawBytes
+---------------------------------------------------------------------*/
void
AP4_HvccAtom::UpdateRawBytes()
{
// FIXME: not implemented yet
}
/*----------------------------------------------------------------------
| AP4_HvccAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_HvccAtom::WriteFields(AP4_ByteStream& stream)
{
return stream.Write(m_RawBytes.GetData(), m_RawBytes.GetDataSize());
}
/*----------------------------------------------------------------------
| AP4_HvccAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_HvccAtom::InspectFields(AP4_AtomInspector& inspector)
{
inspector.AddField("Configuration Version", m_ConfigurationVersion);
inspector.AddField("Profile Space", m_GeneralProfileSpace);
const char* profile_name = GetProfileName(m_GeneralProfileSpace, m_GeneralProfile);
if (profile_name) {
inspector.AddField("Profile", profile_name);
} else {
inspector.AddField("Profile", m_GeneralProfile);
}
inspector.AddField("Tier", m_GeneralTierFlag);
inspector.AddField("Profile Compatibility", m_GeneralProfileCompatibilityFlags, AP4_AtomInspector::HINT_HEX);
inspector.AddField("Constraint", m_GeneralConstraintIndicatorFlags, AP4_AtomInspector::HINT_HEX);
inspector.AddField("Level", m_GeneralLevel);
inspector.AddField("Min Spatial Segmentation", m_MinSpatialSegmentation);
inspector.AddField("Parallelism Type", m_ParallelismType);
inspector.AddField("Chroma Format", m_ChromaFormat);
inspector.AddField("Chroma Depth", m_ChromaBitDepth);
inspector.AddField("Luma Depth", m_LumaBitDepth);
inspector.AddField("Average Frame Rate", m_AverageFrameRate);
inspector.AddField("Constant Frame Rate", m_ConstantFrameRate);
inspector.AddField("Number Of Temporal Layers", m_NumTemporalLayers);
inspector.AddField("Temporal Id Nested", m_TemporalIdNested);
inspector.AddField("NALU Length Size", m_NaluLengthSize);
return AP4_SUCCESS;
}
|
