Ap4EsDescriptor.cpp

/***************************************************************** | | AP4 - ES Descriptors | | Copyright 2002 Gilles Boccon-Gibod | | | 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 "Ap4.h" #include "Ap4EsDescriptor.h" #include "Ap4DescriptorFactory.h" #include "Ap4Utils.h" /*---------------------------------------------------------------------- | AP4_EsDescriptor::AP4_EsDescriptor +---------------------------------------------------------------------*/ AP4_EsDescriptor::AP4_EsDescriptor(AP4_UI16 es_id) : AP4_Descriptor(AP4_DESCRIPTOR_TAG_ES, 2, 2+1), m_EsId(es_id), m_OcrEsId(0), m_Flags(0), m_StreamPriority(0), m_DependsOn(0) { } /*---------------------------------------------------------------------- | AP4_EsDescriptor::AP4_EsDescriptor +---------------------------------------------------------------------*/ AP4_EsDescriptor::AP4_EsDescriptor(AP4_ByteStream& stream, AP4_Size header_size, AP4_Size payload_size) : AP4_Descriptor(AP4_DESCRIPTOR_TAG_ES, header_size, payload_size) { // read descriptor fields if (payload_size < 3) return; stream.ReadUI16(m_EsId); unsigned char bits; stream.ReadUI08(bits); payload_size -= 3; m_Flags = (bits>>5)&7; m_StreamPriority = bits&0x1F; if (m_Flags & AP4_ES_DESCRIPTOR_FLAG_STREAM_DEPENDENCY) { if (payload_size < 2) return; stream.ReadUI16(m_DependsOn); payload_size -= 2; } else { m_DependsOn = 0; } if (m_Flags & AP4_ES_DESCRIPTOR_FLAG_URL) { if (payload_size < 1) return; unsigned char url_length; stream.ReadUI08(url_length); --payload_size; if (url_length) { if (payload_size < url_length) return; char* url = new char[url_length+1]; if (url) { stream.Read(url, url_length, NULL); url[url_length] = '\0'; m_Url = url; delete[] url; } payload_size -= url_length; } } if (m_Flags & AP4_ES_DESCRIPTOR_FLAG_URL) { if (payload_size < 2) return; stream.ReadUI16(m_OcrEsId); payload_size -= 2; } else { m_OcrEsId = 0; } // read other descriptors AP4_Offset offset; stream.Tell(offset); AP4_SubStream* substream = new AP4_SubStream(stream, offset, payload_size); AP4_Descriptor* descriptor = NULL; while (AP4_DescriptorFactory::CreateDescriptorFromStream(*substream, descriptor) == AP4_SUCCESS) { m_SubDescriptors.Add(descriptor); } substream->Release(); } /*---------------------------------------------------------------------- | AP4_EsDescriptor::~AP4_EsDescriptor +---------------------------------------------------------------------*/ AP4_EsDescriptor::~AP4_EsDescriptor() { m_SubDescriptors.DeleteReferences(); } /*---------------------------------------------------------------------- | AP4_EsDescriptor::WriteFields +---------------------------------------------------------------------*/ AP4_Result AP4_EsDescriptor::WriteFields(AP4_ByteStream& stream) { AP4_Result result; // es id result = stream.WriteUI16(m_EsId); if (AP4_FAILED(result)) return result; // flags and other bits AP4_UI08 bits = m_StreamPriority | (AP4_UI08)(m_Flags<<5); result = stream.WriteUI08(bits); if (AP4_FAILED(result)) return result; // optional fields if (m_Flags & AP4_ES_DESCRIPTOR_FLAG_STREAM_DEPENDENCY) { result = stream.WriteUI16(m_DependsOn); if (AP4_FAILED(result)) return result; } if (m_Flags & AP4_ES_DESCRIPTOR_FLAG_URL) { result = stream.WriteUI08((AP4_UI08)m_Url.length()); if (AP4_FAILED(result)) return result; result = stream.WriteString(m_Url.c_str()); if (AP4_FAILED(result)) return result; result = stream.WriteUI08(0); if (AP4_FAILED(result)) return result; } if (m_Flags & AP4_ES_DESCRIPTOR_FLAG_OCR_STREAM) { result = stream.WriteUI16(m_OcrEsId); if (AP4_FAILED(result)) return result; } // write the sub descriptors m_SubDescriptors.Apply(AP4_DescriptorListWriter(stream)); return AP4_SUCCESS; } /*---------------------------------------------------------------------- | AP4_EsDescriptor::Inspect +---------------------------------------------------------------------*/ AP4_Result AP4_EsDescriptor::Inspect(AP4_AtomInspector& inspector) { char info[64]; AP4_StringFormat(info, sizeof(info), "size=%ld+%ld", GetHeaderSize(),m_PayloadSize); inspector.StartElement("#[ES]", info); inspector.AddField("es_id", m_EsId); inspector.AddField("stream_priority", m_StreamPriority); // inspect children m_SubDescriptors.Apply(AP4_DescriptorListInspector(inspector)); inspector.EndElement(); return AP4_SUCCESS; } /*---------------------------------------------------------------------- | AP4_EsDescriptor::AddSubDescriptor +---------------------------------------------------------------------*/ AP4_Result AP4_EsDescriptor::AddSubDescriptor(AP4_Descriptor* descriptor) { m_SubDescriptors.Add(descriptor); m_PayloadSize += descriptor->GetSize(); return AP4_SUCCESS; } /*---------------------------------------------------------------------- | AP4_EsDescriptor::GetDecoderConfigDescriptor +---------------------------------------------------------------------*/ const AP4_DecoderConfigDescriptor* AP4_EsDescriptor::GetDecoderConfigDescriptor() const { // find the decoder config descriptor AP4_Descriptor* descriptor = NULL; AP4_Result result = m_SubDescriptors.Find(AP4_DescriptorFinder(AP4_DESCRIPTOR_TAG_DECODER_CONFIG), descriptor); // return it if (AP4_SUCCEEDED(result)) { return dynamic_cast<AP4_DecoderConfigDescriptor*>(descriptor); } else { return NULL; } }

↑ V730 Not all members of a class are initialized inside the constructor. Consider inspecting: m_SubDescriptors.

↑ V668 There is no sense in testing the 'url' pointer against null, as the memory was allocated using the 'new' operator. The exception will be generated in the case of memory allocation error.

↑ V576 Incorrect format. Consider checking the fifth actual argument of the 'snprintf' function. The integer argument of 32-bit size is expected.

↑ V576 Incorrect format. Consider checking the fourth actual argument of the 'snprintf' function. The integer argument of 32-bit size is expected.