Files
renderdoc/renderdoc/serialise/rdcfile.cpp
T
2020-03-19 17:16:01 +00:00

1228 lines
38 KiB
C++

/******************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2019-2020 Baldur Karlsson
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/
#include "rdcfile.h"
#include <errno.h>
#include "api/replay/version.h"
#include "common/dds_readwrite.h"
#include "common/formatting.h"
#include "jpeg-compressor/jpge.h"
#include "stb/stb_image.h"
#include "lz4io.h"
#include "zstdio.h"
// not provided by tinyexr, just do by hand
bool is_exr_file(FILE *f)
{
FileIO::fseek64(f, 0, SEEK_SET);
const uint32_t openexr_magic = MAKE_FOURCC(0x76, 0x2f, 0x31, 0x01);
uint32_t magic = 0;
size_t bytesRead = FileIO::fread(&magic, 1, sizeof(magic), f);
FileIO::fseek64(f, 0, SEEK_SET);
return bytesRead == sizeof(magic) && magic == openexr_magic;
}
/*
-----------------------------
File format for version 0x100:
RDCHeader
{
uint64_t MAGIC_HEADER;
uint32_t version = 0x00000100;
uint32_t headerLength; // length of this header, from the start of the file. Allows adding new
// fields without breaking compatibilty
char progVersion[16]; // string "v0.34" or similar with 0s after the string
// thumbnail
uint16_t thumbWidth;
uint16_t thumbHeight; // thumbnail width and height. If 0x0, no thumbnail data
uint32_t thumbLength; // number of bytes in thumbnail array below
byte thumbData[ thumbLength ]; // JPG compressed thumbnail
// where was the capture created
uint64_t machineIdent;
uint32_t driverID; // the RDCDriver used for this log
uint8_t driverNameLength; // length in bytes of the driver name including null terminator
char driverName[ driverNameLength ]; // the driver name in ASCII. Useful if the current
// implementation doesn't recognise the driver ID above
}
1 or more sections:
Section
{
char isASCII = '\0' or 'A'; // indicates the section is ASCII or binary. ASCII allows for easy
appending by hand/script
if(isASCII == 'A')
{
// ASCII sections are discouraged for tools, but useful for hand-editing by just
// appending a simple text file
char newline = '\n';
char length[]; // length of just section data below, as decimal string
char newline = '\n';
char sectionType[]; // section type, see SectionType enum, as decimal string.
char newline = '\n';
char sectionVersion[]; // section version, as decimal string. May be 0 when not necessary.
char newline = '\n';
char sectionName[]; // UTF-8 string name of section.
char newline = '\n';
// sectionName is an arbitrary string.
//
// No two sections may have the same section type or section name. Any file
// with duplicates is ill-formed and it's undefined how the file is interpreted.
byte sectiondata[ atoi(length) ]; // section data
}
else if(isASCII == '\0')
{
byte zero[3]; // pad out the above character with 0 bytes. Reserved for future use
uint32_t sectionType; // section type enum, see SectionType. Could be SectionType::Unknown
uint64_t sectionCompressedLength; // byte length of the actual section data on disk
uint64_t sectionUncompressedLength; // byte length of the section data after decompression.
// If the section isn't compressed this will be equal to
// sectionLength
uint64_t sectionVersion; // section version number.
// The meaning of this is section specific and may be 0 if a version
// isn't needed. Most commonly it's used for the frame capture section
// to store the version of the data within.
uint32_t sectionFlags; // section flags - e.g. is compressed or not.
uint32_t sectionNameLength; // byte length of the string below (minimum 1, for null terminator)
char sectionName[sectionNameLength]; // UTF-8 string name of section, optional.
byte sectiondata[length]; // actual contents of the section
}
};
// remainder of the file is tightly packed/unaligned section structures.
// The first section must always be the actual frame capture data in
// binary form, other sections can follow in any order
Section sections[];
*/
static const uint32_t MAGIC_HEADER = MAKE_FOURCC('R', 'D', 'O', 'C');
namespace
{
struct FileHeader
{
FileHeader()
{
magic = MAGIC_HEADER;
version = RDCFile::SERIALISE_VERSION;
headerLength = 0;
RDCEraseEl(progVersion);
char ver[] = MAJOR_MINOR_VERSION_STRING " xxxxxx";
char *hash = strstr(ver, "xxxxxx");
memcpy(hash, GitVersionHash, 6);
memcpy(progVersion, ver, RDCMIN(sizeof(progVersion), sizeof(ver)));
}
uint64_t magic;
uint32_t version;
uint32_t headerLength;
// string "v0.34" or similar with 0s after the string
char progVersion[16];
};
struct BinaryThumbnail
{
// thumbnail width and height. If 0x0, no thumbnail data
uint16_t width;
uint16_t height;
// number of bytes in thumbnail array below
uint32_t length;
// JPG compressed thumbnail
byte data[1];
};
struct CaptureMetaData
{
// where was the capture created
uint64_t machineIdent = 0;
// the RDCDriver used for this log
RDCDriver driverID = RDCDriver::Unknown;
// length in bytes of the driver name
uint8_t driverNameLength = 1;
// the driver name in ASCII. Useful if the current implementation doesn't recognise the driver
// ID above
char driverName[1] = {0};
};
struct BinarySectionHeader
{
// 0x0
byte isASCII;
// 0x0, 0x0, 0x0
byte zero[3];
// section type enum, see SectionType. Could be SectionType::Unknown
SectionType sectionType;
// byte length of the actual section data on disk
uint64_t sectionCompressedLength;
// byte length of the section data after decompression, could be equal to sectionLength if the
// section is not compressed
uint64_t sectionUncompressedLength;
// section version number, with a section specific meaning - could be 0 if not needed.
uint64_t sectionVersion;
// section flags - e.g. is compressed or not.
SectionFlags sectionFlags;
// byte length of the string below (could be 0)
uint32_t sectionNameLength;
// actually sectionNameLength, but at least 1 for null terminator
char name[1];
// char name[sectionNameLength];
// byte data[sectionLength];
};
};
#define SETERROR(error, ...) \
{ \
m_ErrorString = StringFormat::Fmt(__VA_ARGS__); \
RDCERR("%s", m_ErrorString.c_str()); \
m_Error = error; \
}
#define RETURNERROR(error, ...) \
{ \
SETERROR(error, __VA_ARGS__); \
return; \
}
RDCFile::~RDCFile()
{
if(m_File)
FileIO::fclose(m_File);
if(m_Thumb.pixels)
delete[] m_Thumb.pixels;
}
void RDCFile::Open(const char *path)
{
// silently fail when opening the empty string, to allow 'releasing' a capture file by opening an
// empty path.
if(path == NULL || path[0] == 0)
{
RETURNERROR(ContainerError::FileNotFound, "Invalid file path specified");
}
RDCLOG("Opening RDCFile %s", path);
// ensure section header is compiled correctly
RDCCOMPILE_ASSERT(offsetof(BinarySectionHeader, name) == sizeof(uint32_t) * 10,
"BinarySectionHeader size has changed or contains padding");
m_File = FileIO::fopen(path, "rb");
m_Filename = path;
if(!m_File)
{
RETURNERROR(ContainerError::FileNotFound, "Can't open capture file '%s' for read - errno %d",
path, errno);
}
// try to identify if this is an image
{
int x = 0, y = 0, comp = 0;
int ret = stbi_info_from_file(m_File, &x, &y, &comp);
FileIO::fseek64(m_File, 0, SEEK_SET);
byte headerBuffer[4];
const size_t headerSize = FileIO::fread(headerBuffer, 1, 4, m_File);
if(is_dds_file(headerBuffer, headerSize))
ret = x = y = comp = 1;
if(is_exr_file(m_File))
ret = x = y = comp = 1;
FileIO::fseek64(m_File, 0, SEEK_SET);
if(ret == 1 && x > 0 && y > 0 && comp > 0)
{
m_Driver = RDCDriver::Image;
m_DriverName = "Image";
m_MachineIdent = 0;
return;
}
}
FileIO::fseek64(m_File, 0, SEEK_END);
uint64_t fileSize = FileIO::ftell64(m_File);
FileIO::fseek64(m_File, 0, SEEK_SET);
StreamReader reader(m_File, fileSize, Ownership::Nothing);
Init(reader);
}
void RDCFile::Open(const bytebuf &buffer)
{
m_Buffer = buffer;
m_File = NULL;
StreamReader reader(m_Buffer);
Init(reader);
}
void RDCFile::Init(StreamReader &reader)
{
RDCDEBUG("Opened capture file for read");
// read the first part of the file header
FileHeader header;
reader.Read(header);
if(reader.IsErrored())
{
RETURNERROR(ContainerError::FileIO, "I/O error reading magic number");
}
if(header.magic != MAGIC_HEADER)
{
RETURNERROR(ContainerError::Corrupt, "Invalid capture file. Expected magic %08x, got %08x.",
MAGIC_HEADER, (uint32_t)header.magic);
}
m_SerVer = header.version;
if(m_SerVer != SERIALISE_VERSION && m_SerVer != V1_0_VERSION)
{
if(header.version < V1_0_VERSION)
{
RDCEraseEl(header.progVersion);
memcpy(header.progVersion, "v0.x", sizeof("v0.x"));
}
RETURNERROR(
ContainerError::UnsupportedVersion,
"Capture file from wrong version. This program (v%s) uses logfile version %u, this file is "
"logfile version %u captured on %s.",
MAJOR_MINOR_VERSION_STRING, SERIALISE_VERSION, header.version, header.progVersion);
}
BinaryThumbnail thumb;
reader.Read(&thumb, offsetof(BinaryThumbnail, data));
if(reader.IsErrored())
{
RETURNERROR(ContainerError::FileIO, "I/O error reading thumbnail header");
}
// check the thumbnail size is sensible
if(thumb.length > 10 * 1024 * 1024)
{
RETURNERROR(ContainerError::Corrupt, "Thumbnail byte length invalid: %u", thumb.length);
}
byte *thumbData = new byte[thumb.length];
reader.Read(thumbData, thumb.length);
if(reader.IsErrored())
{
delete[] thumbData;
RETURNERROR(ContainerError::FileIO, "I/O error reading thumbnail data");
}
CaptureMetaData meta;
reader.Read(&meta, offsetof(CaptureMetaData, driverName));
if(reader.IsErrored())
{
delete[] thumbData;
RETURNERROR(ContainerError::FileIO, "I/O error reading capture metadata");
}
if(meta.driverNameLength == 0)
{
delete[] thumbData;
RETURNERROR(ContainerError::Corrupt,
"Driver name length is invalid, must be at least 1 to contain NULL terminator");
}
char *driverName = new char[meta.driverNameLength];
reader.Read(driverName, meta.driverNameLength);
if(reader.IsErrored())
{
delete[] thumbData;
delete[] driverName;
RETURNERROR(ContainerError::FileIO, "I/O error reading driver name");
}
driverName[meta.driverNameLength - 1] = '\0';
m_Driver = meta.driverID;
m_DriverName = driverName;
m_MachineIdent = meta.machineIdent;
m_Thumb.width = thumb.width;
m_Thumb.height = thumb.height;
m_Thumb.len = thumb.length;
m_Thumb.format = FileType::JPG;
if(m_Thumb.len > 0 && m_Thumb.width > 0 && m_Thumb.height > 0)
{
m_Thumb.pixels = thumbData;
thumbData = NULL;
}
delete[] thumbData;
delete[] driverName;
if(reader.GetOffset() > header.headerLength)
{
RETURNERROR(ContainerError::FileIO, "I/O error seeking to end of header");
}
reader.SkipBytes(header.headerLength - (uint32_t)reader.GetOffset());
while(!reader.AtEnd())
{
BinarySectionHeader sectionHeader = {0};
byte *reading = (byte *)&sectionHeader;
uint64_t headerOffset = reader.GetOffset();
reader.Read(*reading);
reading++;
if(reader.IsErrored())
break;
if(sectionHeader.isASCII == 'A')
{
// ASCII section
char c = 0;
reader.Read(c);
if(reader.IsErrored())
RETURNERROR(ContainerError::Corrupt, "Invalid ASCII data section '%hhx'", c);
if(reader.AtEnd())
RETURNERROR(ContainerError::Corrupt, "Invalid truncated ASCII data section");
uint64_t length = 0;
c = '0';
while(!reader.IsErrored() && c != '\n')
{
reader.Read(c);
if(c == '\n' || reader.IsErrored())
break;
length *= 10;
length += int(c - '0');
}
if(reader.IsErrored() || reader.AtEnd())
RETURNERROR(ContainerError::Corrupt, "Invalid truncated ASCII data section");
uint32_t type = 0;
c = '0';
while(!reader.AtEnd() && c != '\n')
{
reader.Read(c);
if(c == '\n' || reader.IsErrored())
break;
type *= 10;
type += int(c - '0');
}
if(reader.IsErrored() || reader.AtEnd())
RETURNERROR(ContainerError::Corrupt, "Invalid truncated ASCII data section");
uint64_t version = 0;
c = '0';
while(!reader.AtEnd() && c != '\n')
{
reader.Read(c);
if(c == '\n' || reader.IsErrored())
break;
version *= 10;
version += int(c - '0');
}
if(reader.IsErrored() || reader.AtEnd())
RETURNERROR(ContainerError::Corrupt, "Invalid truncated ASCII data section");
rdcstr name;
c = 0;
while(!reader.AtEnd() && c != '\n')
{
reader.Read(c);
if(c == 0 || c == '\n' || reader.IsErrored())
break;
name.push_back(c);
}
if(reader.IsErrored() || reader.AtEnd())
RETURNERROR(ContainerError::Corrupt, "Invalid truncated ASCII data section");
SectionProperties props;
props.flags = SectionFlags::ASCIIStored;
props.type = (SectionType)type;
props.name = name;
props.version = version;
props.compressedSize = length;
props.uncompressedSize = length;
SectionLocation loc;
loc.headerOffset = headerOffset;
loc.dataOffset = reader.GetOffset();
loc.diskLength = length;
reader.SkipBytes(loc.diskLength);
if(reader.IsErrored())
RETURNERROR(ContainerError::Corrupt, "Error seeking past ASCII section '%s' data",
name.c_str());
m_Sections.push_back(props);
m_SectionLocations.push_back(loc);
}
else if(sectionHeader.isASCII == 0x0)
{
// -1 because we've already read the isASCII byte
reader.Read(reading, offsetof(BinarySectionHeader, name) - 1);
if(reader.IsErrored())
RETURNERROR(ContainerError::Corrupt, "Error reading binary section header");
SectionProperties props;
props.flags = sectionHeader.sectionFlags;
props.type = sectionHeader.sectionType;
props.compressedSize = sectionHeader.sectionCompressedLength;
props.uncompressedSize = sectionHeader.sectionUncompressedLength;
props.version = sectionHeader.sectionVersion;
if(sectionHeader.sectionNameLength == 0 || sectionHeader.sectionNameLength > 2 * 1024)
{
RETURNERROR(ContainerError::Corrupt, "Invalid section name length %u",
sectionHeader.sectionNameLength);
}
props.name.resize(sectionHeader.sectionNameLength - 1);
reader.Read(&props.name[0], sectionHeader.sectionNameLength - 1);
if(reader.IsErrored())
RETURNERROR(ContainerError::Corrupt, "Error reading binary section header");
reader.SkipBytes(1);
if(reader.IsErrored())
RETURNERROR(ContainerError::Corrupt, "Error reading binary section header");
SectionLocation loc;
loc.headerOffset = headerOffset;
loc.dataOffset = reader.GetOffset();
loc.diskLength = sectionHeader.sectionCompressedLength;
m_Sections.push_back(props);
m_SectionLocations.push_back(loc);
reader.SkipBytes(loc.diskLength);
if(reader.IsErrored())
RETURNERROR(ContainerError::Corrupt, "Error seeking past binary section '%s' data",
props.name.c_str());
}
else
{
RETURNERROR(ContainerError::Corrupt, "Unrecognised section type '%hhx'", sectionHeader.isASCII);
}
}
if(SectionIndex(SectionType::FrameCapture) == -1)
{
RETURNERROR(ContainerError::Corrupt, "Capture file doesn't have a frame capture");
}
int index = SectionIndex(SectionType::ExtendedThumbnail);
if(index >= 0)
{
StreamReader *thumbReader = ReadSection(index);
if(thumbReader)
{
ExtThumbnailHeader thumbHeader;
if(thumbReader->Read(thumbHeader))
{
thumbData = new byte[thumbHeader.len];
bool succeeded = thumbReader->Read(thumbData, thumbHeader.len) && !thumbReader->IsErrored();
if(succeeded && (uint32_t)thumbHeader.format < (uint32_t)FileType::Count)
{
m_Thumb.width = thumbHeader.width;
m_Thumb.height = thumbHeader.height;
m_Thumb.len = thumbHeader.len;
m_Thumb.format = thumbHeader.format;
delete[] m_Thumb.pixels;
m_Thumb.pixels = thumbData;
}
else
{
delete[] thumbData;
}
thumbData = NULL;
}
delete thumbReader;
}
}
}
bool RDCFile::CopyFileTo(const char *filename)
{
if(!m_File)
return false;
// remember our position and close the file
uint64_t prevPos = FileIO::ftell64(m_File);
FileIO::fclose(m_File);
// try to move to the new location
bool success = FileIO::Copy(m_Filename.c_str(), filename, true);
// if it succeeded, update our filename
if(success)
m_Filename = filename;
// re-open the file (either the new one, or the old one if it failed) and re-seek
m_File = FileIO::fopen(m_Filename.c_str(), "rb");
FileIO::fseek64(m_File, prevPos, SEEK_SET);
return success;
}
void RDCFile::SetData(RDCDriver driver, const char *driverName, uint64_t machineIdent,
const RDCThumb *thumb)
{
m_Driver = driver;
m_DriverName = driverName;
m_MachineIdent = machineIdent;
if(thumb)
{
m_Thumb = *thumb;
byte *pixels = new byte[m_Thumb.len];
memcpy(pixels, thumb->pixels, m_Thumb.len);
m_Thumb.pixels = pixels;
}
}
void RDCFile::Create(const char *filename)
{
m_File = FileIO::fopen(filename, "wb");
m_Filename = filename;
RDCDEBUG("creating RDC file.");
if(!m_File)
{
RETURNERROR(ContainerError::FileIO, "Can't open capture file '%s' for write, errno %d",
filename, errno);
}
RDCDEBUG("Opened capture file for write");
FileHeader header; // automagically initialised with correct data apart from length
BinaryThumbnail thumbHeader = {0};
thumbHeader.width = m_Thumb.width;
thumbHeader.height = m_Thumb.height;
const byte *jpgPixels = m_Thumb.pixels;
thumbHeader.length = m_Thumb.len;
byte *jpgBuffer = NULL;
if(m_Thumb.format != FileType::JPG && m_Thumb.width > 0 && m_Thumb.height > 0)
{
// the primary thumbnail must be in JPG format, must perform conversion
const byte *rawPixels = NULL;
byte *rawBuffer = NULL;
int w = (int)m_Thumb.width;
int h = (int)m_Thumb.height;
int comp = 3;
if(m_Thumb.format == FileType::Raw)
{
rawPixels = m_Thumb.pixels;
}
else
{
rawBuffer = stbi_load_from_memory(m_Thumb.pixels, (int)m_Thumb.len, &w, &h, &comp, 3);
rawPixels = rawBuffer;
}
if(rawPixels)
{
int len = w * h * comp;
jpgBuffer = new byte[len];
jpge::params p;
p.m_quality = 90;
jpge::compress_image_to_jpeg_file_in_memory(jpgBuffer, len, w, h, comp, rawPixels, p);
thumbHeader.length = (uint32_t)len;
jpgPixels = jpgBuffer;
}
else
{
thumbHeader.width = 0;
thumbHeader.height = 0;
thumbHeader.length = 0;
jpgPixels = NULL;
}
if(rawBuffer)
stbi_image_free(rawBuffer);
}
CaptureMetaData meta;
meta.driverID = m_Driver;
meta.machineIdent = m_MachineIdent;
meta.driverNameLength = uint8_t(m_DriverName.size() + 1);
header.headerLength = sizeof(FileHeader) + offsetof(BinaryThumbnail, data) + thumbHeader.length +
offsetof(CaptureMetaData, driverName) + meta.driverNameLength;
{
StreamWriter writer(m_File, Ownership::Nothing);
writer.Write(header);
writer.Write(&thumbHeader, offsetof(BinaryThumbnail, data));
if(thumbHeader.length > 0)
writer.Write(jpgPixels, thumbHeader.length);
writer.Write(&meta, offsetof(CaptureMetaData, driverName));
writer.Write(m_DriverName.c_str(), meta.driverNameLength);
delete[] jpgBuffer;
if(writer.IsErrored())
{
RETURNERROR(ContainerError::FileIO, "Error writing file header");
}
}
// re-open as read-only now.
FileIO::fclose(m_File);
m_File = FileIO::fopen(filename, "rb");
FileIO::fseek64(m_File, 0, SEEK_END);
}
int RDCFile::SectionIndex(SectionType type) const
{
// Unknown is not a real type, any arbitrary sections with names will be listed as unknown, so
// don't return a false-positive index. This allows us to skip some special cases outside
if(type == SectionType::Unknown)
return -1;
for(size_t i = 0; i < m_Sections.size(); i++)
if(m_Sections[i].type == type)
return int(i);
return -1;
}
int RDCFile::SectionIndex(const char *name) const
{
for(size_t i = 0; i < m_Sections.size(); i++)
if(m_Sections[i].name == name)
return int(i);
// last ditch, see if name is a known section type and search for that type. This should have been
// normalised on write, but maybe it didn't
for(SectionType s : values<SectionType>())
if(ToStr(s) == name)
return SectionIndex(s);
return -1;
}
StreamReader *RDCFile::ReadSection(int index) const
{
if(m_Error != ContainerError::NoError)
return new StreamReader(StreamReader::InvalidStream);
if(m_File == NULL)
{
if(index < (int)m_MemorySections.size())
return new StreamReader(m_MemorySections[index]);
RDCERR("Section %d is not available in memory.", index);
return new StreamReader(StreamReader::InvalidStream);
}
const SectionProperties &props = m_Sections[index];
SectionLocation offsetSize = m_SectionLocations[index];
FileIO::fseek64(m_File, offsetSize.dataOffset, SEEK_SET);
StreamReader *fileReader = new StreamReader(m_File, offsetSize.diskLength, Ownership::Nothing);
StreamReader *compReader = NULL;
if(props.flags & SectionFlags::LZ4Compressed)
{
// the user will delete the compressed reader, and then it will delete the compressor and the
// file reader
compReader = new StreamReader(new LZ4Decompressor(fileReader, Ownership::Stream),
props.uncompressedSize, Ownership::Stream);
}
else if(props.flags & SectionFlags::ZstdCompressed)
{
compReader = new StreamReader(new ZSTDDecompressor(fileReader, Ownership::Stream),
props.uncompressedSize, Ownership::Stream);
}
// if we're compressing return that writer, otherwise return the file writer directly
return compReader ? compReader : fileReader;
}
StreamWriter *RDCFile::WriteSection(const SectionProperties &props)
{
if(m_Error != ContainerError::NoError)
return new StreamWriter(StreamWriter::InvalidStream);
RDCASSERT((size_t)props.type < (size_t)SectionType::Count);
if(m_File == NULL)
{
// if we have no file to write to, we just cache it in memory for future use (e.g. later writing
// to disk via the CaptureFile interface wih structured data for the frame capture section)
StreamWriter *w = new StreamWriter(64 * 1024);
w->AddCloseCallback([this, props, w]() {
m_MemorySections.push_back(bytebuf(w->GetData(), (size_t)w->GetOffset()));
m_Sections.push_back(props);
m_Sections.back().compressedSize = m_Sections.back().uncompressedSize =
m_MemorySections.back().size();
});
return w;
}
// re-open the file as read-write
{
uint64_t offs = FileIO::ftell64(m_File);
FileIO::fclose(m_File);
m_File = FileIO::fopen(m_Filename.c_str(), "r+b");
if(m_File == NULL)
{
RDCERR("Couldn't re-open file as read/write to write section.");
m_File = FileIO::fopen(m_Filename.c_str(), "rb");
if(m_File)
FileIO::fseek64(m_File, offs, SEEK_SET);
return new StreamWriter(StreamWriter::InvalidStream);
}
FileIO::fseek64(m_File, offs, SEEK_SET);
}
if(m_Sections.empty() && props.type != SectionType::FrameCapture)
{
RDCERR("The first section written must be frame capture data.");
return new StreamWriter(StreamWriter::InvalidStream);
}
if(!m_CurrentWritingProps.name.empty())
{
RDCERR("Only one section can be written at once.");
return new StreamWriter(StreamWriter::InvalidStream);
}
rdcstr name = props.name;
SectionType type = props.type;
// normalise names for known sections
if(type != SectionType::Unknown && type < SectionType::Count)
name = ToStr(type);
if(name.empty())
{
RDCERR("Sections must have a name, either auto-populated from a known type or specified.");
return new StreamWriter(StreamWriter::InvalidStream);
}
// For handling a section that does exist, it depends on the section type:
// - For frame capture, then we just write to a new file since we want it
// to be first. Once the writing is done, copy across any other sections
// after it.
// - For non-frame capture, we remove the existing section and move up any
// sections that were after it. Then just return a new writer that appends
// we store this callback here so that we can execute it after any post-section-writing header
// fixups. We need to be able to fixup any pre-existing sections that got shifted around.
StreamCloseCallback modifySectionCallback;
if(SectionIndex(type) >= 0 || SectionIndex(name.c_str()) >= 0)
{
if(type == SectionType::FrameCapture || name == ToStr(SectionType::FrameCapture))
{
// simple case - if there are no other sections then we can just overwrite the existing frame
// capture.
if(NumSections() == 1)
{
// seek to the start of where the section is.
FileIO::fseek64(m_File, m_SectionLocations[0].headerOffset, SEEK_SET);
uint64_t oldLength = m_SectionLocations[0].diskLength;
// after writing, we need to be sure to fixup the size (in case we wrote less data).
modifySectionCallback = [this, oldLength]() {
if(oldLength > m_SectionLocations[0].diskLength)
{
FileIO::ftruncateat(
m_File, m_SectionLocations[0].dataOffset + m_SectionLocations[0].diskLength);
}
};
}
else
{
FILE *origFile = m_File;
// save the sections
rdcarray<SectionProperties> origSections = m_Sections;
rdcarray<SectionLocation> origSectionLocations = m_SectionLocations;
SectionLocation oldCaptureLocation = m_SectionLocations[0];
// remove section 0, the frame capture, since it will be fixed up separately
origSections.erase(0);
origSectionLocations.erase(0);
rdcstr tempFilename = FileIO::GetTempFolderFilename() + "capture_rewrite.rdc";
// create the file, this will overwrite m_File with the new file and file header using the
// existing loaded metadata
Create(tempFilename.c_str());
// after we've written the frame capture, we need to copy over the other sections into the
// temporary file and finally move the temporary file over the top of the existing file.
modifySectionCallback = [this, origFile, origSections, origSectionLocations, tempFilename]() {
// seek to write after the frame capture
FileIO::fseek64(
m_File, m_SectionLocations[0].dataOffset + m_SectionLocations[0].diskLength, SEEK_SET);
// write the old sections
for(size_t i = 0; i < origSections.size(); i++)
{
SectionLocation loc = origSectionLocations[i];
FileIO::fseek64(origFile, loc.headerOffset, SEEK_SET);
uint64_t newHeaderOffset = FileIO::ftell64(m_File);
// update the offsets to where they are in the new file
if(newHeaderOffset > loc.headerOffset)
{
uint64_t delta = newHeaderOffset - loc.headerOffset;
loc.headerOffset += delta;
loc.dataOffset += delta;
}
else if(newHeaderOffset < loc.headerOffset)
{
uint64_t delta = loc.headerOffset - newHeaderOffset;
loc.headerOffset -= delta;
loc.dataOffset -= delta;
}
uint64_t headerLen = loc.dataOffset - loc.headerOffset;
// copy header and data together
StreamWriter writer(m_File, Ownership::Nothing);
StreamReader reader(origFile, headerLen + loc.diskLength, Ownership::Nothing);
m_Sections.push_back(origSections[i]);
m_SectionLocations.push_back(loc);
StreamTransfer(&writer, &reader, NULL);
}
// close the file writing to the temp location
FileIO::fclose(m_File);
// move the temp file over the original
FileIO::Move(tempFilename.c_str(), m_Filename.c_str(), true);
// re-open the file after it's been overwritten.
m_File = FileIO::fopen(m_Filename.c_str(), "r+b");
};
// fall through - we'll write to m_File immediately after the file header
}
// the new section data for the framecapture will be pushed on after writing. Any others will
// be re-added in the fixup step above
m_Sections.clear();
m_SectionLocations.clear();
}
else
{
// we're writing some section after the frame capture. We'll do this in-place by reading the
// other sections out to memory (assuming that they are mostly small, and even if they are
// somewhat large, it's still much better to leave the frame capture (which should dominate
// file size) on disk where it is.
int index = SectionIndex(type);
if(index < 0)
index = SectionIndex(name.c_str());
RDCASSERT(index >= 0);
rdcarray<bytebuf> origSectionData;
rdcarray<uint64_t> origHeaderSizes;
uint64_t overwriteLocation = m_SectionLocations[index].headerOffset;
uint64_t oldLength = m_SectionLocations[index].diskLength;
// erase the target section. The others will be moved up to match
m_Sections.erase(index);
m_SectionLocations.erase(index);
origSectionData.reserve(NumSections() - index);
origHeaderSizes.reserve(NumSections() - index);
// go through all subsequent sections after this one in the file, read them into memory.
// this could be optimised since we're going to write them back out below, we could do this
// just with an in-memory window large enough.
for(int i = index; i < NumSections(); i++)
{
const SectionLocation &loc = m_SectionLocations[i];
FileIO::fseek64(m_File, loc.headerOffset, SEEK_SET);
uint64_t headerLen = loc.dataOffset - loc.headerOffset;
// read header and data together
StreamReader reader(m_File, headerLen + loc.diskLength, Ownership::Nothing);
origHeaderSizes.push_back(headerLen);
origSectionData.push_back(bytebuf());
bytebuf &data = origSectionData.back();
data.resize((size_t)reader.GetSize());
reader.Read(data.data(), data.size());
}
// we write the sections now over where the old section used to be, so the newly written
// section is last in the file. This means if the same section is updated over and over, it
// doesn't require moving any sections once it's already at the end.
// seek to write to where the removed section started
FileIO::fseek64(m_File, overwriteLocation, SEEK_SET);
// write the old sections
for(size_t i = 0; i < origSectionData.size(); i++)
{
// update the offsets to where they are in the new file
m_SectionLocations[index + i].headerOffset = FileIO::ftell64(m_File);
m_SectionLocations[index + i].dataOffset =
m_SectionLocations[index + i].headerOffset + origHeaderSizes[i];
// write the data
StreamWriter writer(m_File, Ownership::Nothing);
writer.Write(origSectionData[i].data(), origSectionData[i].size());
}
// after writing, we need to be sure to fixup the size (in case we wrote less data).
modifySectionCallback = [this, oldLength]() {
if(oldLength > m_SectionLocations.back().diskLength)
{
FileIO::ftruncateat(
m_File, m_SectionLocations.back().dataOffset + m_SectionLocations.back().diskLength);
}
};
// fall through - we now write to m_File with the new section wherever we left off after the
// moved sections.
}
}
else
{
// we're adding a new section - seek to the end of the file to append it
FileIO::fseek64(m_File, 0, SEEK_END);
}
uint64_t headerOffset = FileIO::ftell64(m_File);
size_t numWritten;
// write section header
BinarySectionHeader header = {// IsASCII
'\0',
// zero
{0, 0, 0},
// sectionType
type,
// sectionCompressedLength
0,
// sectionUncompressedLength
0,
// sectionVersion
props.version,
// sectionFlags
props.flags,
// sectionNameLength
uint32_t(name.length() + 1)};
// write the header then name
numWritten = FileIO::fwrite(&header, 1, offsetof(BinarySectionHeader, name), m_File);
numWritten += FileIO::fwrite(name.c_str(), 1, name.size() + 1, m_File);
if(numWritten != offsetof(BinarySectionHeader, name) + name.size() + 1)
{
SETERROR(ContainerError::FileIO, "Error seeking to end of file, errno %d", errno);
return new StreamWriter(StreamWriter::InvalidStream);
}
// create a writer for writing to disk. It shouldn't close the file
StreamWriter *fileWriter = new StreamWriter(m_File, Ownership::Nothing);
StreamWriter *compWriter = NULL;
if(props.flags & SectionFlags::LZ4Compressed)
{
// the user will delete the compressed writer, and then it will delete the compressor and the
// file writer
compWriter =
new StreamWriter(new LZ4Compressor(fileWriter, Ownership::Stream), Ownership::Stream);
}
else if(props.flags & SectionFlags::ZstdCompressed)
{
compWriter =
new StreamWriter(new ZSTDCompressor(fileWriter, Ownership::Stream), Ownership::Stream);
}
uint64_t dataOffset = FileIO::ftell64(m_File);
m_CurrentWritingProps = props;
m_CurrentWritingProps.name = name;
// register a destroy callback to tidy up the section at the end
fileWriter->AddCloseCallback([this, type, name, headerOffset, dataOffset, fileWriter, compWriter]() {
FileIO::fflush(m_File);
// the offset of the file writer is how many bytes were written to disk - the compressed length.
uint64_t compressedLength = fileWriter->GetOffset();
// if there was no compression, this is also the uncompressed length.
uint64_t uncompressedLength = compressedLength;
if(compWriter)
uncompressedLength = compWriter->GetOffset();
RDCLOG("Finishing write to section %u (%s). Compressed from %llu bytes to %llu (%.2f %%)", type,
name.c_str(), uncompressedLength, compressedLength,
100.0 * (double(compressedLength) / double(uncompressedLength)));
// finish up the properties and add to list of sections
m_CurrentWritingProps.compressedSize = compressedLength;
m_CurrentWritingProps.uncompressedSize = uncompressedLength;
m_Sections.push_back(m_CurrentWritingProps);
SectionLocation loc;
loc.headerOffset = headerOffset;
loc.dataOffset = dataOffset;
loc.diskLength = compressedLength;
m_SectionLocations.push_back(loc);
m_CurrentWritingProps = SectionProperties();
FileIO::fseek64(m_File, headerOffset + offsetof(BinarySectionHeader, sectionCompressedLength),
SEEK_SET);
size_t bytesWritten = FileIO::fwrite(&compressedLength, 1, sizeof(uint64_t), m_File);
bytesWritten += FileIO::fwrite(&uncompressedLength, 1, sizeof(uint64_t), m_File);
if(bytesWritten != 2 * sizeof(uint64_t))
{
RETURNERROR(ContainerError::FileIO, "Error applying fixup to section header, errno %d", errno);
}
FileIO::fflush(m_File);
});
if(modifySectionCallback)
fileWriter->AddCloseCallback(modifySectionCallback);
// finally once we're done, re-open the file as read-only again
fileWriter->AddCloseCallback([this]() {
// remember our position and close the file
uint64_t prevPos = FileIO::ftell64(m_File);
FileIO::fclose(m_File);
// re-open the file and re-seek
m_File = FileIO::fopen(m_Filename.c_str(), "rb");
FileIO::fseek64(m_File, prevPos, SEEK_SET);
});
// if we're compressing return that writer, otherwise return the file writer directly
return compWriter ? compWriter : fileWriter;
}
FILE *RDCFile::StealImageFileHandle(rdcstr &filename)
{
if(m_Driver != RDCDriver::Image)
{
RDCERR("Can't steal image file handle for non-image RDCFile");
return NULL;
}
filename = m_Filename;
FILE *ret = m_File;
m_File = NULL;
return ret;
}