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Use boost.interprocess's mmap wrapper in the PCM provider

This commit is contained in:
Thomas Goyne 2014-03-20 15:26:28 -07:00
parent 3fa48281b0
commit 3222275750
12 changed files with 137 additions and 150 deletions
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3
build/libaegisub/libaegisub.vcxproj
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@ -52,6 +52,7 @@
<ClInclude Include="$(SrcDir)include\libaegisub\color.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\dispatch.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\exception.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\file_mapping.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\fs.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\fs_fwd.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\hotkey.h" />
@ -77,7 +78,6 @@
<ClInclude Include="$(SrcDir)include\libaegisub\time.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\util.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\util_osx.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\util_win.h" />
<ClInclude Include="$(SrcDir)include\libaegisub\vfr.h" />
<ClInclude Include="$(SrcDir)lagi_pre.h" />
</ItemGroup>
@ -97,6 +97,7 @@
<ClCompile Include="$(SrcDir)common\charset_conv.cpp" />
<ClCompile Include="$(SrcDir)common\color.cpp" />
<ClCompile Include="$(SrcDir)common\dispatch.cpp" />
<ClCompile Include="$(SrcDir)common\file_mapping.cpp" />
<ClCompile Include="$(SrcDir)common\fs.cpp" />
<ClCompile Include="$(SrcDir)common\hotkey.cpp" />
<ClCompile Include="$(SrcDir)common\io.cpp" />

9
build/libaegisub/libaegisub.vcxproj.filters
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@ -80,9 +80,6 @@
<ClInclude Include="$(SrcDir)include\libaegisub\util_osx.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="$(SrcDir)include\libaegisub\util_win.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="$(SrcDir)include\libaegisub\vfr.h">
<Filter>Header Files</Filter>
</ClInclude>
@ -167,6 +164,9 @@
<ClInclude Include="$(SrcDir)include\libaegisub\address_of_adaptor.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="$(SrcDir)include\libaegisub\file_mapping.h">
<Filter>Header Files</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="$(SrcDir)windows\lagi_pre.cpp">
@ -274,6 +274,9 @@
<ClCompile Include="$(SrcDir)common\karaoke_matcher.cpp">
<Filter>Source Files\Common</Filter>
</ClCompile>
<ClCompile Include="$(SrcDir)common\file_mapping.cpp">
<Filter>Source Files\Common</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<None Include="$(SrcDir)include\libaegisub\charsets.def">

1
libaegisub/Makefile
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@ -25,6 +25,7 @@ SRC += \
common/charset_conv.cpp \
common/color.cpp \
common/dispatch.cpp \
common/file_mapping.cpp \
common/fs.cpp \
common/hotkey.cpp \
common/io.cpp \

66
libaegisub/common/file_mapping.cpp Normal file
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@ -0,0 +1,66 @@
// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
#include "../config.h"
#include "libaegisub/file_mapping.h"
#include "libaegisub/fs.h"
#include "libaegisub/util.h"
#include <boost/filesystem.hpp>
#include <Windows.h>
using namespace boost::interprocess;
namespace agi {
file_mapping::file_mapping(agi::fs::path const& filename, mode_t mode)
#ifdef _WIN32
: handle(CreateFileW(filename.wstring().c_str(), (unsigned int)mode, 0, nullptr, OPEN_EXISTING, 0, 0))
{
if (handle == ipcdetail::invalid_file()) {
switch (GetLastError()) {
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
throw fs::FileNotFound(filename);
case ERROR_ACCESS_DENIED:
throw fs::ReadDenied(filename);
default:
throw fs::FileSystemUnknownError(util::ErrorString(GetLastError()));
}
}
#else
: handle(ipcdetail::open_existing_file(filename.string().c_str(), mode))
{
if (handle == ipcdetail::invalid_file()) {
switch (errno) {
case ENOENT:
throw fs::FileNotFound(filename);
case EACCES:
throw fs::ReadDenied(filename);
case EIO:
throw fs::FileSystemUnknownError("Fatal I/O opening path: " + filename.string());
}
}
#endif
}
file_mapping::~file_mapping() {
if (handle != ipcdetail::invalid_file()) {
ipcdetail::close_file(handle);
}
}
}

29
libaegisub/include/libaegisub/util_win.h → libaegisub/include/libaegisub/file_mapping.h
View File

@ -1,4 +1,4 @@
// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
@ -11,18 +11,23 @@
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
/// @file util.h
/// @brief Public interface for Windows utilities.
/// @ingroup libaegisub windows
#include <libaegisub/fs_fwd.h>
#include <string>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <boost/interprocess/detail/os_file_functions.hpp>
namespace agi {
namespace util {
std::string ErrorString(DWORD error);
} // namespace util
} // namespace agi
// boost::interprocess::file_mapping is awesome and uses CreateFileA on Windows
class file_mapping {
boost::interprocess::file_handle_t handle;
public:
file_mapping(fs::path const& filename, boost::interprocess::mode_t mode);
~file_mapping();
boost::interprocess::mapping_handle_t get_mapping_handle() const {
return boost::interprocess::ipcdetail::mapping_handle_from_file_handle(handle);
}
};
}

2
libaegisub/include/libaegisub/util.h
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@ -72,5 +72,7 @@ namespace agi {
return std::any_of(std::begin(r), std::end(r), std::forward<Predicate>(p));
}
std::string ErrorString(int error);
} // namespace util
} // namespace agi

1
libaegisub/windows/access.cpp
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@ -22,7 +22,6 @@
#include <libaegisub/fs.h>
#include <libaegisub/log.h>
#include <libaegisub/util.h>
#include <libaegisub/util_win.h>
#include <boost/filesystem.hpp>
#include <boost/format.hpp>

4
libaegisub/windows/fs.cpp
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@ -22,7 +22,7 @@
#include "libaegisub/charset_conv_win.h"
#include "libaegisub/exception.h"
#include "libaegisub/scoped_ptr.h"
#include "libaegisub/util_win.h"
#include "libaegisub/util.h"
using agi::charset::ConvertW;
using agi::charset::ConvertLocal;
@ -30,6 +30,8 @@ using agi::charset::ConvertLocal;
#include <boost/filesystem.hpp>
namespace bfs = boost::filesystem;
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#include <versionhelpers.h>
#undef CreateDirectory

2
libaegisub/windows/path_win.cpp
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@ -20,7 +20,7 @@
#include <libaegisub/path.h>
#include <libaegisub/util_win.h>
#include <libaegisub/util.h>
#include <boost/filesystem.hpp>

3
libaegisub/windows/util_win.cpp
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@ -19,7 +19,6 @@
#include "../config.h"
#include "libaegisub/util.h"
#include "libaegisub/util_win.h"
#include "libaegisub/charset_conv_win.h"
@ -33,7 +32,7 @@ namespace agi {
using agi::charset::ConvertW;
std::string ErrorString(DWORD error) {
std::string ErrorString(int error) {
LPWSTR lpstr = nullptr;
if(FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, nullptr, error, 0, reinterpret_cast<LPWSTR>(&lpstr), 0, nullptr) == 0) {

130
src/audio_provider_pcm.cpp
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@ -39,50 +39,21 @@
#include "audio_controller.h"
#include "utils.h"
#include <libaegisub/file_mapping.h>
#include <libaegisub/fs.h>
#include <libaegisub/log.h>
#include <libaegisub/util.h>
#include <boost/interprocess/file_mapping.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <cassert>
#include <cstdint>
#ifndef _WIN32
#include <sys/fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#endif
using namespace boost::interprocess;
PCMAudioProvider::PCMAudioProvider(agi::fs::path const& filename)
#ifdef _WIN32
: file_handle(0, CloseHandle)
, file_mapping(0, CloseHandle)
: file(agi::util::make_unique<agi::file_mapping>(filename, read_only))
{
file_handle = CreateFile(
filename.c_str(),
FILE_READ_DATA,
FILE_SHARE_READ|FILE_SHARE_WRITE,
0,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL|FILE_FLAG_RANDOM_ACCESS,
0);
if (file_handle == INVALID_HANDLE_VALUE)
throw agi::fs::FileNotFound(filename);
file_mapping = CreateFileMapping(
file_handle,
0,
PAGE_READONLY,
0, 0,
0);
if (file_mapping == 0)
throw agi::AudioProviderOpenError("Failed creating file mapping", 0);
#else
: file_handle(open(filename.c_str(), O_RDONLY), close)
{
if (file_handle == -1)
throw agi::fs::FileNotFound(filename.string());
#endif
float_samples = false;
try {
@ -93,79 +64,36 @@ PCMAudioProvider::PCMAudioProvider(agi::fs::path const& filename)
}
}
PCMAudioProvider::~PCMAudioProvider() {
#ifdef _WIN32
if (current_mapping)
UnmapViewOfFile(current_mapping);
#else
if (current_mapping)
munmap(current_mapping, mapping_length);
#endif
}
PCMAudioProvider::~PCMAudioProvider() { }
char * PCMAudioProvider::EnsureRangeAccessible(int64_t range_start, int64_t range_length) const {
if (range_start + range_length > file_size)
char *PCMAudioProvider::EnsureRangeAccessible(int64_t start, int64_t length) const {
if (start + length > file_size)
throw AudioDecodeError("Attempted to map beyond end of file");
// Check whether the requested range is already visible
if (!current_mapping || range_start < mapping_start || range_start+range_length > mapping_start+(int64_t)mapping_length) {
// It's not visible, change the current mapping
if (current_mapping) {
#ifdef _WIN32
UnmapViewOfFile(current_mapping);
#else
munmap(current_mapping, mapping_length);
#endif
}
// Check if we can just use the current mapping
if (region && start >= mapping_start && start + length <= mapping_start + region->get_size())
return static_cast<char *>(region->get_address()) + start - mapping_start;
// Align range start on a 1 MB boundary and go 16 MB back
mapping_start = (range_start & ~0xFFFFF) - 0x1000000;
if (mapping_start < 0) mapping_start = 0;
if (sizeof(void*) > 4)
// Large address space, use a 2 GB mapping
mapping_length = 0x80000000;
else
// Small (32 bit) address space, use a 256 MB mapping
mapping_length = 0x10000000;
// Make sure to always make a mapping at least as large as the requested range
if ((int64_t)mapping_length < range_length) {
if (range_length > (int64_t)(~(size_t)0))
throw AudioDecodeError("Requested range larger than max size_t, cannot create view of file");
mapping_length = range_length;
}
// But also make sure we don't try to make a mapping larger than the file
if (mapping_start + (int64_t)mapping_length > file_size)
mapping_length = (size_t)(file_size - mapping_start);
// We already checked that the requested range doesn't extend over the end of the file
// Hopefully this should ensure that small files are always mapped in their entirety
#ifdef _WIN32
LARGE_INTEGER mapping_start_li;
mapping_start_li.QuadPart = mapping_start;
current_mapping = MapViewOfFile(
file_mapping, // Mapping handle
FILE_MAP_READ, // Access type
mapping_start_li.HighPart, // Offset high-part
mapping_start_li.LowPart, // Offset low-part
mapping_length); // Length of view
#else
current_mapping = mmap(nullptr, mapping_length, PROT_READ, MAP_PRIVATE, file_handle, mapping_start);
#endif
if (!current_mapping)
throw AudioDecodeError("Failed mapping a view of the file");
if (sizeof(size_t) == 4) {
mapping_start = start & ~0xFFFFFULL; // Align to 1 MB bondary
length += static_cast<size_t>(start - mapping_start);
// Map 16 MB or length rounded up to the next MB
length = std::min<size_t>(std::max<size_t>(0x1000000U, (length + 0xFFFFF) & ~0xFFFFF), file_size - mapping_start);
}
else {
// Just map the whole file
mapping_start = 0;
length = file_size;
}
assert(current_mapping);
assert(range_start >= mapping_start);
try {
region = agi::util::make_unique<mapped_region>(*file, read_only, mapping_start, length);
}
catch (interprocess_exception const&) {
throw AudioDecodeError("Failed mapping a view of the file");
}
// Difference between actual current mapping start and requested range start
ptrdiff_t rel_ofs = (ptrdiff_t)(range_start - mapping_start);
// Calculate a pointer into current mapping for the requested range
return ((char*)current_mapping) + rel_ofs;
return static_cast<char *>(region->get_address()) + start - mapping_start;
}
void PCMAudioProvider::FillBuffer(void *buf, int64_t start, int64_t count) const {

37
src/audio_provider_pcm.h
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@ -27,42 +27,23 @@
//
// Aegisub Project http://www.aegisub.org/
/// @file audio_provider_pcm.h
/// @see audio_provider_pcm.cpp
/// @ingroup audio_input
///
#include <vector>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
#include "include/aegisub/audio_provider.h"
#include <libaegisub/scoped_ptr.h>
#include <memory>
#include <vector>
namespace agi { class file_mapping; }
namespace boost { namespace interprocess { class mapped_region; } }
class PCMAudioProvider : public AudioProvider {
mutable void *current_mapping = nullptr;
#ifdef _WIN32
std::unique_ptr<agi::file_mapping> file;
mutable std::unique_ptr<boost::interprocess::mapped_region> region;
mutable int64_t mapping_start = 0;
mutable size_t mapping_length = 0;
agi::scoped_holder<HANDLE, BOOL (__stdcall *)(HANDLE)> file_handle;
agi::scoped_holder<HANDLE, BOOL (__stdcall *)(HANDLE)> file_mapping;
#else
mutable off_t mapping_start = 0;
mutable size_t mapping_length = 0;
agi::scoped_holder<int, int(*)(int)> file_handle;
#endif
protected:
PCMAudioProvider(agi::fs::path const& filename); // Create base object and open the file mapping
virtual ~PCMAudioProvider(); // Closes the file mapping
char * EnsureRangeAccessible(int64_t range_start, int64_t range_length) const; // Ensure that the given range of bytes are accessible in the file mapping and return a pointer to the first byte of the requested range
~PCMAudioProvider(); // Closes the file mapping
char *EnsureRangeAccessible(int64_t range_start, int64_t range_length) const; // Ensure that the given range of bytes are accessible in the file mapping and return a pointer to the first byte of the requested range
/// Size of the opened file
int64_t file_size = 0;