275 lines
10 KiB
C
275 lines
10 KiB
C
/*****************************************************************************
|
|
* input.c: common input functions
|
|
*****************************************************************************
|
|
* Copyright (C) 2010-2025 x264 project
|
|
*
|
|
* Authors: Steven Walters <kemuri9@gmail.com>
|
|
* Henrik Gramner <henrik@gramner.com>
|
|
*
|
|
* This program 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 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
|
|
*
|
|
* This program is also available under a commercial proprietary license.
|
|
* For more information, contact us at licensing@x264.com.
|
|
*****************************************************************************/
|
|
|
|
#include "input.h"
|
|
|
|
#ifdef _WIN32
|
|
#include <io.h>
|
|
#elif HAVE_MMAP
|
|
#include <sys/mman.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
const x264_cli_csp_t x264_cli_csps[] = {
|
|
[X264_CSP_I400] = { "i400", 1, { 1 }, { 1 }, 1, 1 },
|
|
[X264_CSP_I420] = { "i420", 3, { 1, .5, .5 }, { 1, .5, .5 }, 2, 2 },
|
|
[X264_CSP_I422] = { "i422", 3, { 1, .5, .5 }, { 1, 1, 1 }, 2, 1 },
|
|
[X264_CSP_I444] = { "i444", 3, { 1, 1, 1 }, { 1, 1, 1 }, 1, 1 },
|
|
[X264_CSP_YV12] = { "yv12", 3, { 1, .5, .5 }, { 1, .5, .5 }, 2, 2 },
|
|
[X264_CSP_YV16] = { "yv16", 3, { 1, .5, .5 }, { 1, 1, 1 }, 2, 1 },
|
|
[X264_CSP_YV24] = { "yv24", 3, { 1, 1, 1 }, { 1, 1, 1 }, 1, 1 },
|
|
[X264_CSP_NV12] = { "nv12", 2, { 1, 1 }, { 1, .5 }, 2, 2 },
|
|
[X264_CSP_NV21] = { "nv21", 2, { 1, 1 }, { 1, .5 }, 2, 2 },
|
|
[X264_CSP_NV16] = { "nv16", 2, { 1, 1 }, { 1, 1 }, 2, 1 },
|
|
[X264_CSP_YUYV] = { "yuyv", 1, { 2 }, { 1 }, 2, 1 },
|
|
[X264_CSP_UYVY] = { "uyvy", 1, { 2 }, { 1 }, 2, 1 },
|
|
[X264_CSP_BGR] = { "bgr", 1, { 3 }, { 1 }, 1, 1 },
|
|
[X264_CSP_BGRA] = { "bgra", 1, { 4 }, { 1 }, 1, 1 },
|
|
[X264_CSP_RGB] = { "rgb", 1, { 3 }, { 1 }, 1, 1 },
|
|
};
|
|
|
|
int x264_cli_csp_is_invalid( int csp )
|
|
{
|
|
int csp_mask = csp & X264_CSP_MASK;
|
|
return csp_mask <= X264_CSP_NONE || csp_mask >= X264_CSP_CLI_MAX ||
|
|
csp_mask == X264_CSP_V210 || csp & X264_CSP_OTHER;
|
|
}
|
|
|
|
int x264_cli_csp_depth_factor( int csp )
|
|
{
|
|
if( x264_cli_csp_is_invalid( csp ) )
|
|
return 0;
|
|
return (csp & X264_CSP_HIGH_DEPTH) ? 2 : 1;
|
|
}
|
|
|
|
int64_t x264_cli_pic_plane_size( int csp, int width, int height, int plane )
|
|
{
|
|
int csp_mask = csp & X264_CSP_MASK;
|
|
if( x264_cli_csp_is_invalid( csp ) || plane < 0 || plane >= x264_cli_csps[csp_mask].planes )
|
|
return 0;
|
|
int64_t size = (int64_t)width * height;
|
|
size *= x264_cli_csps[csp_mask].width[plane] * x264_cli_csps[csp_mask].height[plane];
|
|
size *= x264_cli_csp_depth_factor( csp );
|
|
return size;
|
|
}
|
|
|
|
int64_t x264_cli_pic_size( int csp, int width, int height )
|
|
{
|
|
if( x264_cli_csp_is_invalid( csp ) )
|
|
return 0;
|
|
int64_t size = 0;
|
|
int csp_mask = csp & X264_CSP_MASK;
|
|
for( int i = 0; i < x264_cli_csps[csp_mask].planes; i++ )
|
|
size += x264_cli_pic_plane_size( csp, width, height, i );
|
|
return size;
|
|
}
|
|
|
|
static int cli_pic_init_internal( cli_pic_t *pic, int csp, int width, int height, int align, int alloc )
|
|
{
|
|
memset( pic, 0, sizeof(cli_pic_t) );
|
|
int csp_mask = csp & X264_CSP_MASK;
|
|
if( x264_cli_csp_is_invalid( csp ) )
|
|
pic->img.planes = 0;
|
|
else
|
|
pic->img.planes = x264_cli_csps[csp_mask].planes;
|
|
pic->img.csp = csp;
|
|
pic->img.width = width;
|
|
pic->img.height = height;
|
|
for( int i = 0; i < pic->img.planes; i++ )
|
|
{
|
|
int stride = width * x264_cli_csps[csp_mask].width[i];
|
|
stride *= x264_cli_csp_depth_factor( csp );
|
|
stride = ALIGN( stride, align );
|
|
pic->img.stride[i] = stride;
|
|
|
|
if( alloc )
|
|
{
|
|
int64_t size = (int64_t)(height * x264_cli_csps[csp_mask].height[i]) * stride;
|
|
pic->img.plane[i] = x264_malloc( size );
|
|
if( !pic->img.plane[i] )
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int x264_cli_pic_alloc( cli_pic_t *pic, int csp, int width, int height )
|
|
{
|
|
return cli_pic_init_internal( pic, csp, width, height, 1, 1 );
|
|
}
|
|
|
|
int x264_cli_pic_alloc_aligned( cli_pic_t *pic, int csp, int width, int height )
|
|
{
|
|
return cli_pic_init_internal( pic, csp, width, height, NATIVE_ALIGN, 1 );
|
|
}
|
|
|
|
int x264_cli_pic_init_noalloc( cli_pic_t *pic, int csp, int width, int height )
|
|
{
|
|
return cli_pic_init_internal( pic, csp, width, height, 1, 0 );
|
|
}
|
|
|
|
void x264_cli_pic_clean( cli_pic_t *pic )
|
|
{
|
|
for( int i = 0; i < pic->img.planes; i++ )
|
|
x264_free( pic->img.plane[i] );
|
|
memset( pic, 0, sizeof(cli_pic_t) );
|
|
}
|
|
|
|
const x264_cli_csp_t *x264_cli_get_csp( int csp )
|
|
{
|
|
if( x264_cli_csp_is_invalid( csp ) )
|
|
return NULL;
|
|
return x264_cli_csps + (csp&X264_CSP_MASK);
|
|
}
|
|
|
|
/* Functions for handling memory-mapped input frames */
|
|
int x264_cli_mmap_init( cli_mmap_t *h, FILE *fh )
|
|
{
|
|
#if defined(_WIN32) || HAVE_MMAP
|
|
int fd = fileno( fh );
|
|
x264_struct_stat file_stat;
|
|
if( !x264_fstat( fd, &file_stat ) )
|
|
{
|
|
h->file_size = file_stat.st_size;
|
|
#ifdef _WIN32
|
|
HANDLE osfhandle = (HANDLE)_get_osfhandle( fd );
|
|
if( osfhandle != INVALID_HANDLE_VALUE )
|
|
{
|
|
SYSTEM_INFO si;
|
|
GetSystemInfo( &si );
|
|
h->page_mask = si.dwPageSize - 1;
|
|
h->align_mask = si.dwAllocationGranularity - 1;
|
|
h->prefetch_virtual_memory = (void*)GetProcAddress( GetModuleHandleW( L"kernel32.dll" ), "PrefetchVirtualMemory" );
|
|
h->process_handle = GetCurrentProcess();
|
|
h->map_handle = CreateFileMappingW( osfhandle, NULL, PAGE_READONLY, 0, 0, NULL );
|
|
return !h->map_handle;
|
|
}
|
|
#elif HAVE_MMAP && defined(_SC_PAGESIZE)
|
|
h->align_mask = sysconf( _SC_PAGESIZE ) - 1;
|
|
h->fd = fd;
|
|
return h->align_mask < 0 || fd < 0;
|
|
#endif
|
|
}
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
/* Third-party filters such as swscale can overread the input buffer which may result
|
|
* in segfaults. We have to pad the buffer size as a workaround to avoid that. */
|
|
#define MMAP_PADDING 64
|
|
|
|
void *x264_cli_mmap( cli_mmap_t *h, int64_t offset, int64_t size )
|
|
{
|
|
#if defined(_WIN32) || HAVE_MMAP
|
|
uint8_t *base;
|
|
int align = offset & h->align_mask;
|
|
if( offset < 0 || size < 0 || (uint64_t)size > (SIZE_MAX - MMAP_PADDING - align) )
|
|
return NULL;
|
|
offset -= align;
|
|
size += align;
|
|
#ifdef _WIN32
|
|
/* If the padding crosses a page boundary we need to increase the mapping size. */
|
|
size_t padded_size = (-size & h->page_mask) < MMAP_PADDING ? size + MMAP_PADDING : size;
|
|
if( (uint64_t)offset + padded_size > (uint64_t)h->file_size )
|
|
{
|
|
/* It's not possible to do the POSIX mmap() remapping trick on Windows, so if the padding crosses a
|
|
* page boundary past the end of the file we have to copy the entire frame into a padded buffer. */
|
|
if( (base = MapViewOfFile( h->map_handle, FILE_MAP_READ, (uint64_t)offset >> 32, offset, size )) )
|
|
{
|
|
uint8_t *buf = NULL;
|
|
HANDLE anon_map = CreateFileMappingW( INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, (uint64_t)padded_size >> 32, padded_size, NULL );
|
|
if( anon_map )
|
|
{
|
|
if( (buf = MapViewOfFile( anon_map, FILE_MAP_WRITE, 0, 0, 0 )) )
|
|
{
|
|
buf += align;
|
|
memcpy( buf, base + align, size - align );
|
|
}
|
|
CloseHandle( anon_map );
|
|
}
|
|
UnmapViewOfFile( base );
|
|
return buf;
|
|
}
|
|
}
|
|
else if( (base = MapViewOfFile( h->map_handle, FILE_MAP_READ, (uint64_t)offset >> 32, offset, padded_size )) )
|
|
{
|
|
/* PrefetchVirtualMemory() is only available on Windows 8 and newer. */
|
|
if( h->prefetch_virtual_memory )
|
|
{
|
|
struct { void *addr; size_t size; } mem_range = { base, size };
|
|
h->prefetch_virtual_memory( h->process_handle, 1, &mem_range, 0 );
|
|
}
|
|
return base + align;
|
|
}
|
|
#else
|
|
size_t padded_size = size + MMAP_PADDING;
|
|
if( (base = mmap( NULL, padded_size, PROT_READ, MAP_PRIVATE, h->fd, offset )) != MAP_FAILED )
|
|
{
|
|
/* Ask the OS to readahead pages. This improves performance whereas
|
|
* forcing page faults by manually accessing every page does not.
|
|
* Some systems have implemented madvise() but not posix_madvise()
|
|
* and vice versa, so check both to see if either is available. */
|
|
#ifdef MADV_WILLNEED
|
|
madvise( base, size, MADV_WILLNEED );
|
|
#elif defined(POSIX_MADV_WILLNEED)
|
|
posix_madvise( base, size, POSIX_MADV_WILLNEED );
|
|
#endif
|
|
/* Remap the file mapping of any padding that crosses a page boundary past the end of
|
|
* the file into a copy of the last valid page to prevent reads from invalid memory. */
|
|
size_t aligned_size = (padded_size - 1) & ~h->align_mask;
|
|
if( offset + aligned_size >= h->file_size )
|
|
mmap( base + aligned_size, padded_size - aligned_size, PROT_READ, MAP_PRIVATE|MAP_FIXED, h->fd, (offset + size - 1) & ~h->align_mask );
|
|
|
|
return base + align;
|
|
}
|
|
#endif
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
int x264_cli_munmap( cli_mmap_t *h, void *addr, int64_t size )
|
|
{
|
|
#if defined(_WIN32) || HAVE_MMAP
|
|
void *base = (void*)((intptr_t)addr & ~h->align_mask);
|
|
#ifdef _WIN32
|
|
return !UnmapViewOfFile( base );
|
|
#else
|
|
if( size < 0 || size > (SIZE_MAX - MMAP_PADDING - ((intptr_t)addr - (intptr_t)base)) )
|
|
return -1;
|
|
return munmap( base, size + MMAP_PADDING + (intptr_t)addr - (intptr_t)base );
|
|
#endif
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
void x264_cli_mmap_close( cli_mmap_t *h )
|
|
{
|
|
#ifdef _WIN32
|
|
CloseHandle( h->map_handle );
|
|
#endif
|
|
}
|