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|
/*****************************************************************
|
| AP4 - avcC Atoms
|
| Copyright 2002-2008 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 "Ap4Av1cAtom.h"
#include "Ap4AtomFactory.h"
#include "Ap4Utils.h"
#include "Ap4Types.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_Av1cAtom)
/*----------------------------------------------------------------------
| AP4_Av1cAtom::GetProfileName
+---------------------------------------------------------------------*/
const char*
AP4_Av1cAtom::GetProfileName(AP4_UI08 profile)
{
switch (profile) {
case AP4_AV1_PROFILE_MAIN: return "Main";
case AP4_AV1_PROFILE_HIGH: return "High";
case AP4_AV1_PROFILE_PROFESSIONAL: return "Professional";
default: return NULL;
}
}
/*----------------------------------------------------------------------
| AP4_Av1cAtom::Create
+---------------------------------------------------------------------*/
AP4_Av1cAtom*
AP4_Av1cAtom::Create(AP4_Size size, AP4_ByteStream& stream)
{
unsigned int payload_size = size-AP4_ATOM_HEADER_SIZE;
if (payload_size < 4) {
return NULL;
}
AP4_UI08 bits[4];
AP4_Result result = stream.Read(bits, 4);
if (AP4_FAILED(result)) {
return NULL;
}
AP4_UI08 version = bits[0] & 0x7F;
AP4_UI08 seq_profile = bits[1] >> 5;
AP4_UI08 seq_level_idx_0 = bits[1] & 0x1F;
AP4_UI08 seq_tier_0 = (bits[2] >> 7) & 1;
AP4_UI08 high_bitdepth = (bits[2] >> 6) & 1;
AP4_UI08 twelve_bit = (bits[2] >> 5) & 1;
AP4_UI08 monochrome = (bits[2] >> 4) & 1;
AP4_UI08 chroma_subsampling_x = (bits[2] >> 3) & 1;
AP4_UI08 chroma_subsampling_y = (bits[2] >> 2) & 1;
AP4_UI08 chroma_sample_position = (bits[2] ) & 3;
AP4_UI08 initial_presentation_delay_present = (bits[3] >> 4) & 1;
AP4_UI08 initial_presentation_delay_minus_one;
if (initial_presentation_delay_present) {
initial_presentation_delay_minus_one = (bits[3] >> 4) & 0x0F;
} else {
initial_presentation_delay_minus_one = 0;
}
AP4_DataBuffer config_obus;
if (payload_size > 4) {
config_obus.SetDataSize(payload_size - 4);
result = stream.Read(config_obus.UseData(), payload_size - 4);
if (AP4_FAILED(result)) {
return NULL;
}
}
return new AP4_Av1cAtom(version,
seq_profile,
seq_level_idx_0,
seq_tier_0,
high_bitdepth,
twelve_bit,
monochrome,
chroma_subsampling_x,
chroma_subsampling_y,
chroma_sample_position,
initial_presentation_delay_present,
initial_presentation_delay_minus_one,
config_obus.GetData(),
config_obus.GetDataSize());
}
/*----------------------------------------------------------------------
| AP4_Av1cAtom::AP4_Av1cAtom
+---------------------------------------------------------------------*/
AP4_Av1cAtom::AP4_Av1cAtom() :
AP4_Atom(AP4_ATOM_TYPE_AV1C, AP4_ATOM_HEADER_SIZE),
m_Version(1),
m_SeqProfile(0),
m_SeqLevelIdx0(0),
m_SeqTier0(0),
m_HighBitDepth(0),
m_TwelveBit(0),
m_Monochrome(0),
m_ChromaSubsamplingX(0),
m_ChromaSubsamplingY(0),
m_ChromaSamplePosition(0),
m_InitialPresentationDelayPresent(0),
m_InitialPresentationDelayMinusOne(0)
{
m_Size32 += 4;
}
/*----------------------------------------------------------------------
| AP4_Av1cAtom::AP4_Av1cAtom
+---------------------------------------------------------------------*/
AP4_Av1cAtom::AP4_Av1cAtom(AP4_UI08 version,
AP4_UI08 seq_profile,
AP4_UI08 seq_level_idx_0,
AP4_UI08 seq_tier_0,
AP4_UI08 high_bitdepth,
AP4_UI08 twelve_bit,
AP4_UI08 monochrome,
AP4_UI08 chroma_subsampling_x,
AP4_UI08 chroma_subsampling_y,
AP4_UI08 chroma_sample_position,
AP4_UI08 initial_presentation_delay_present,
AP4_UI08 initial_presentation_delay_minus_one,
const AP4_UI08* config_obus,
AP4_Size config_obus_size) :
AP4_Atom(AP4_ATOM_TYPE_AV1C, AP4_ATOM_HEADER_SIZE),
m_Version(version),
m_SeqProfile(seq_profile),
m_SeqLevelIdx0(seq_level_idx_0),
m_SeqTier0(seq_tier_0),
m_HighBitDepth(high_bitdepth),
m_TwelveBit(twelve_bit),
m_Monochrome(monochrome),
m_ChromaSubsamplingX(chroma_subsampling_x),
m_ChromaSubsamplingY(chroma_subsampling_y),
m_ChromaSamplePosition(chroma_sample_position),
m_InitialPresentationDelayPresent(initial_presentation_delay_present),
m_InitialPresentationDelayMinusOne(initial_presentation_delay_minus_one)
{
m_Size32 += 4 + config_obus_size;
if (config_obus && config_obus_size) {
m_ConfigObus.SetData(config_obus, config_obus_size);
}
}
/*----------------------------------------------------------------------
| AP4_Av1cAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_Av1cAtom::WriteFields(AP4_ByteStream& stream)
{
AP4_UI08 bits[4];
bits[0] = (1 << 7) | m_Version;
bits[1] = (m_SeqProfile << 5) | m_SeqLevelIdx0;
bits[2] = (m_SeqTier0 << 7) |
(m_HighBitDepth << 6) |
(m_TwelveBit << 5) |
(m_Monochrome << 4) |
(m_ChromaSubsamplingX << 3) |
(m_ChromaSubsamplingY << 2) |
(m_ChromaSamplePosition );
bits[3] = (m_InitialPresentationDelayPresent << 4) | m_InitialPresentationDelayMinusOne;
AP4_Result result = stream.Write(bits, 4);
if (AP4_FAILED(result)) return result;
if (m_ConfigObus.GetDataSize()) {
result = stream.Write(m_ConfigObus.GetData(), m_ConfigObus.GetDataSize());
if (AP4_FAILED(result)) return result;
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_Av1cAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_Av1cAtom::InspectFields(AP4_AtomInspector& inspector)
{
inspector.AddField("version", m_Version);
inspector.AddField("seq_profile", m_SeqProfile);
inspector.AddField("seq_level_idx_0", m_SeqLevelIdx0);
inspector.AddField("seq_tier_0", m_SeqTier0);
inspector.AddField("high_bitdepth", m_HighBitDepth);
inspector.AddField("twelve_bit", m_TwelveBit);
inspector.AddField("monochrome", m_Monochrome);
inspector.AddField("chroma_subsampling_x", m_ChromaSubsamplingX);
inspector.AddField("chroma_subsampling_y", m_ChromaSubsamplingY);
inspector.AddField("chroma_sample_position", m_ChromaSamplePosition);
inspector.AddField("initial_presentation_delay", m_InitialPresentationDelayPresent ? m_InitialPresentationDelayMinusOne + 1 : 0);
return AP4_SUCCESS;
}
|
