add VipsStreamiu
a streami subclass (u for user?) with actions signals you can connect to to provide implementations of read and seek
This commit is contained in:
John Cupitt
parent
486b95eb7b
commit
857aafc8c2
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@ -3,7 +3,7 @@
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#set -x
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set -e
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# Glib is build without -fno-omit-frame-pointer. We need
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# Glib is built without -fno-omit-frame-pointer. We need
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# to disable the fast unwinder to get full stacktraces.
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export ASAN_OPTIONS="fast_unwind_on_malloc=0:allocator_may_return_null=1"
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export UBSAN_OPTIONS="print_stacktrace=1"
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@ -191,8 +191,11 @@ typedef struct _VipsStreamiClass {
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*
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* Unseekable streams should always return -1. VipsStreami will then
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* seek by _read()ing bytes into memory as required.
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*
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* We have to use int64 rather than off_t, since we must work on
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* Windows, where off_t can be 32-bits.
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*/
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gint64 (*seek)( VipsStreami *, gint64 offset, int );
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gint64 (*seek)( VipsStreami *, gint64, int );
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} VipsStreamiClass;
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@ -217,6 +220,44 @@ size_t vips_streami_sniff_at_most( VipsStreami *streami,
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unsigned char *vips_streami_sniff( VipsStreami *streami, size_t length );
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gint64 vips_streami_size( VipsStreami *streami );
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#define VIPS_TYPE_STREAMIU (vips_streamiu_get_type())
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#define VIPS_STREAMIU( obj ) \
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(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
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VIPS_TYPE_STREAMIU, VipsStreamiu ))
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#define VIPS_STREAMIU_CLASS( klass ) \
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(G_TYPE_CHECK_CLASS_CAST( (klass), \
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VIPS_TYPE_STREAMIU, VipsStreamiuClass))
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#define VIPS_IS_STREAMIU( obj ) \
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(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_STREAMIU ))
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#define VIPS_IS_STREAMIU_CLASS( klass ) \
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(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_STREAMIU ))
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#define VIPS_STREAMIU_GET_CLASS( obj ) \
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(G_TYPE_INSTANCE_GET_CLASS( (obj), \
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VIPS_TYPE_STREAMIU, VipsStreamiuClass ))
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/* Subclass of streamiu with signals for handlers. This is supposed to be
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* useful for language bindings.
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*/
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typedef struct _VipsStreamiu {
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VipsStreami parent_object;
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} VipsStreamiu;
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typedef struct _VipsStreamiuClass {
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VipsStreamiClass parent_class;
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/* The action signals clients can use to implement read and seek.
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* We must use gint64 everywhere since there's no G_TYPE_SIZE.
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*/
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gint64 (*read)( VipsStreamiu *, void *, gint64 );
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gint64 (*seek)( VipsStreamiu *, gint64, int );
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} VipsStreamiuClass;
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GType vips_streamiu_get_type( void );
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VipsStreamiu *vips_streamiu_new( void );
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#define VIPS_TYPE_STREAMO (vips_streamo_get_type())
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#define VIPS_STREAMO( obj ) \
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(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
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@ -3,6 +3,7 @@ noinst_LTLIBRARIES = libiofuncs.la
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libiofuncs_la_SOURCES = \
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stream.c \
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streami.c \
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streamiu.c \
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streamo.c \
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bufis.c \
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dbuf.c \
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@ -40,9 +41,9 @@ libiofuncs_la_SOURCES = \
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system.c \
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buffer.c
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vipsmarshal.h:
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vipsmarshal.h: vipsmarshal.list
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glib-genmarshal --prefix=vips --header vipsmarshal.list > vipsmarshal.h
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vipsmarshal.c:
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vipsmarshal.c: vipsmarshal.list
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echo "#include \"vipsmarshal.h\"" > vipsmarshal.c
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glib-genmarshal --prefix=vips --body vipsmarshal.list >> vipsmarshal.c
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@ -331,6 +331,7 @@ vips_init( const char *argv0 )
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extern GType sink_memory_thread_state_get_type( void );
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extern GType render_thread_state_get_type( void );
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extern GType vips_streami_get_type( void );
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extern GType vips_streamiu_get_type( void );
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extern GType vips_streamo_get_type( void );
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static gboolean started = FALSE;
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@ -447,6 +448,7 @@ vips_init( const char *argv0 )
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(void) sink_memory_thread_state_get_type();
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(void) render_thread_state_get_type();
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(void) vips_streami_get_type();
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(void) vips_streamiu_get_type();
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(void) vips_streamo_get_type();
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vips__meta_init_types();
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vips__interpolate_init();
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@ -33,10 +33,7 @@
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/* TODO
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*
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* - gaussblur is missing the vector path again argh
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* - can we map and then close the fd? how about on Windows?
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* - make a subclass that lets you set vfuncs as params, inc. close(),
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* is_pipe etc.
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*/
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/*
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@ -280,7 +277,6 @@ vips_streami_read_real( VipsStreami *streami, void *data, size_t length )
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} while( bytes_read < 0 && errno == EINTR );
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return( bytes_read );
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}
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static gint64
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@ -0,0 +1,247 @@
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/* A Streamiu subclass with signals you can easily hook up to other input
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* sources.
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*
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* J.Cupitt, 21/11/19
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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/* TODO
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*
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* - can we map and then close the fd? how about on Windows?
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*/
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/*
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*/
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#define VIPS_DEBUG
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif /*HAVE_UNISTD_H*/
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <vips/vips.h>
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#include <vips/internal.h>
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#include <vips/debug.h>
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#include "vipsmarshal.h"
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G_DEFINE_TYPE( VipsStreamiu, vips_streamiu, VIPS_TYPE_STREAMI );
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/* Our signals.
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*/
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enum {
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SIG_SEEK,
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SIG_READ,
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SIG_LAST
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};
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static guint vips_streamiu_signals[SIG_LAST] = { 0 };
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static void
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vips_streamiu_finalize( GObject *gobject )
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{
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VipsStreamiu *streamiu = VIPS_STREAMIU( gobject );
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VIPS_DEBUG_MSG( "vips_streamiu_finalize:\n" );
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G_OBJECT_CLASS( vips_streamiu_parent_class )->finalize( gobject );
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}
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static int
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vips_streamiu_build( VipsObject *object )
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{
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VipsStream *stream = VIPS_STREAM( object );
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VipsStreamiu *streamiu = VIPS_STREAMIU( object );
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VipsStreamiuClass *class = VIPS_STREAMIU_GET_CLASS( streamiu );
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VIPS_DEBUG_MSG( "vips_streamiu_build: %p\n", streamiu );
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if( VIPS_OBJECT_CLASS( vips_streamiu_parent_class )->
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build( object ) )
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return( -1 );
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return( 0 );
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}
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static ssize_t
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vips_streamiu_read_real( VipsStreami *streami,
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void *data, size_t length )
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{
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ssize_t size;
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VIPS_DEBUG_MSG( "vips_streamiu_read_real:\n" );
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g_signal_emit( streami, vips_streamiu_signals[SIG_READ], 0,
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data, length, &size );
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VIPS_DEBUG_MSG( " %zd\n", size );
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return( size );
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}
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static gint64
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vips_streamiu_seek_real( VipsStreami *streami,
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gint64 offset, int whence )
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{
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gint64 new_position;
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VIPS_DEBUG_MSG( "vips_streamiu_seek_real:\n" );
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g_signal_emit( streami, vips_streamiu_signals[SIG_SEEK], 0,
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offset, whence, &new_position );
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VIPS_DEBUG_MSG( " %zd\n", new_position );
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return( new_position );
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}
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static gint64
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vips_streamiu_read_signal_real( VipsStreamiu *streamiu,
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void *data, gint64 length )
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{
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VIPS_DEBUG_MSG( "vips_streamiu_read_signal_real:\n" );
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return( 0 );
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}
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static gint64
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vips_streamiu_seek_signal_real( VipsStreamiu *streamiu,
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gint64 offset, int whence )
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{
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VIPS_DEBUG_MSG( "vips_streamiu_seek_signal_real:\n" );
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return( -1 );
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}
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static void
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vips_streamiu_class_init( VipsStreamiuClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = VIPS_OBJECT_CLASS( class );
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VipsStreamiClass *streami_class = VIPS_STREAMI_CLASS( class );
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gobject_class->finalize = vips_streamiu_finalize;
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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object_class->nickname = "streamiu";
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object_class->description = _( "input stream" );
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object_class->build = vips_streamiu_build;
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streami_class->read = vips_streamiu_read_real;
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streami_class->seek = vips_streamiu_seek_real;
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class->read = vips_streamiu_read_signal_real;
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class->seek = vips_streamiu_seek_signal_real;
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/**
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* VipsStreamiu::read:
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* @streamiu: the stream being operated on
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* @buffer: %gint64, seek offset
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* @size: %gint, seek origin
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*
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* This signal is emitted to seek the stream. The handler should
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* change the stream position appropriately.
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*
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* Returns: the new seek position.
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*/
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vips_streamiu_signals[SIG_READ] = g_signal_new( "read",
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G_TYPE_FROM_CLASS( class ),
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G_SIGNAL_ACTION,
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G_STRUCT_OFFSET( VipsStreamiuClass, read ),
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NULL, NULL,
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vips_INT64__INT64_INT,
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G_TYPE_INT64, 2,
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G_TYPE_INT64, G_TYPE_INT );
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/**
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* VipsStreamiu::seek:
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* @streamiu: the stream being operated on
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* @offset: %gint64, seek offset
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* @whence: %gint, seek origin
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*
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* This signal is emitted to seek the stream. The handler should
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* change the stream position appropriately.
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*
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* The handler on an unseekable stream should always return -1.
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*
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* Returns: the new seek position.
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*/
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vips_streamiu_signals[SIG_SEEK] = g_signal_new( "seek",
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G_TYPE_FROM_CLASS( class ),
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G_SIGNAL_ACTION,
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G_STRUCT_OFFSET( VipsStreamiuClass, seek ),
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NULL, NULL,
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vips_INT64__POINTER_INT64,
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G_TYPE_INT64, 2,
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G_TYPE_POINTER, G_TYPE_INT64 );
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}
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static void
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vips_streamiu_init( VipsStreamiu *streamiu )
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{
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}
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/**
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* vips_streamiu_new:
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*
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* Create a #VipsStreamiu. Attach signals to implement read and seek.
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*
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* Returns: a new #VipsStreamiu
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*/
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VipsStreamiu *
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vips_streamiu_new( void )
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{
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VipsStreamiu *streamiu;
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VIPS_DEBUG_MSG( "vips_streamiu_new:\n" );
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streamiu = VIPS_STREAMIU( g_object_new( VIPS_TYPE_STREAMIU, NULL ) );
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if( vips_object_build( VIPS_OBJECT( streamiu ) ) ) {
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VIPS_UNREF( streamiu );
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return( NULL );
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}
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return( streamiu );
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}
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@ -1,7 +1,6 @@
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#include "vipsmarshal.h"
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#include <glib-object.h>
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/* This file is generated by glib-genmarshal, do not modify it. This code is licensed under the same license as the containing project. Note that it links to GLib, so must comply with the LGPL linking clauses. */
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#include <glib-object.h>
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#ifdef G_ENABLE_DEBUG
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#define g_marshal_value_peek_boolean(v) g_value_get_boolean (v)
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@ -49,21 +48,20 @@
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#define g_marshal_value_peek_variant(v) (v)->data[0].v_pointer
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#endif /* !G_ENABLE_DEBUG */
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/* INT:VOID (vipsmarshal.list:25) */
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/* INT: VOID (vipsmarshal.list:25) */
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void
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vips_INT__VOID (GClosure *closure,
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GValue *return_value G_GNUC_UNUSED,
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GValue *return_value,
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guint n_param_values,
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const GValue *param_values,
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gpointer invocation_hint G_GNUC_UNUSED,
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gpointer marshal_data)
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{
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typedef gint (*GMarshalFunc_INT__VOID) (gpointer data1,
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gpointer data2);
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register GMarshalFunc_INT__VOID callback;
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register GCClosure *cc = (GCClosure*) closure;
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register gpointer data1, data2;
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typedef gint (*GMarshalFunc_INT__VOID) (gpointer data1,
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gpointer data2);
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GCClosure *cc = (GCClosure *) closure;
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gpointer data1, data2;
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GMarshalFunc_INT__VOID callback;
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gint v_return;
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g_return_if_fail (return_value != NULL);
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@ -87,3 +85,85 @@ vips_INT__VOID (GClosure *closure,
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g_value_set_int (return_value, v_return);
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}
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/* INT64: INT64, INT (vipsmarshal.list:26) */
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void
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vips_INT64__INT64_INT (GClosure *closure,
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GValue *return_value,
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guint n_param_values,
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const GValue *param_values,
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gpointer invocation_hint G_GNUC_UNUSED,
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gpointer marshal_data)
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{
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typedef gint64 (*GMarshalFunc_INT64__INT64_INT) (gpointer data1,
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gint64 arg1,
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gint arg2,
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gpointer data2);
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GCClosure *cc = (GCClosure *) closure;
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gpointer data1, data2;
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GMarshalFunc_INT64__INT64_INT callback;
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gint64 v_return;
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g_return_if_fail (return_value != NULL);
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g_return_if_fail (n_param_values == 3);
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if (G_CCLOSURE_SWAP_DATA (closure))
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{
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data1 = closure->data;
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data2 = g_value_peek_pointer (param_values + 0);
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}
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else
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{
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data1 = g_value_peek_pointer (param_values + 0);
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data2 = closure->data;
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}
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callback = (GMarshalFunc_INT64__INT64_INT) (marshal_data ? marshal_data : cc->callback);
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v_return = callback (data1,
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g_marshal_value_peek_int64 (param_values + 1),
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g_marshal_value_peek_int (param_values + 2),
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data2);
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g_value_set_int64 (return_value, v_return);
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}
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/* INT64: POINTER, INT64 (vipsmarshal.list:27) */
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void
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vips_INT64__POINTER_INT64 (GClosure *closure,
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GValue *return_value,
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guint n_param_values,
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const GValue *param_values,
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gpointer invocation_hint G_GNUC_UNUSED,
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gpointer marshal_data)
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{
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typedef gint64 (*GMarshalFunc_INT64__POINTER_INT64) (gpointer data1,
|
||||
gpointer arg1,
|
||||
gint64 arg2,
|
||||
gpointer data2);
|
||||
GCClosure *cc = (GCClosure *) closure;
|
||||
gpointer data1, data2;
|
||||
GMarshalFunc_INT64__POINTER_INT64 callback;
|
||||
gint64 v_return;
|
||||
|
||||
g_return_if_fail (return_value != NULL);
|
||||
g_return_if_fail (n_param_values == 3);
|
||||
|
||||
if (G_CCLOSURE_SWAP_DATA (closure))
|
||||
{
|
||||
data1 = closure->data;
|
||||
data2 = g_value_peek_pointer (param_values + 0);
|
||||
}
|
||||
else
|
||||
{
|
||||
data1 = g_value_peek_pointer (param_values + 0);
|
||||
data2 = closure->data;
|
||||
}
|
||||
callback = (GMarshalFunc_INT64__POINTER_INT64) (marshal_data ? marshal_data : cc->callback);
|
||||
|
||||
v_return = callback (data1,
|
||||
g_marshal_value_peek_pointer (param_values + 1),
|
||||
g_marshal_value_peek_int64 (param_values + 2),
|
||||
data2);
|
||||
|
||||
g_value_set_int64 (return_value, v_return);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,20 +1,39 @@
|
|||
/* This file is generated by glib-genmarshal, do not modify it. This code is licensed under the same license as the containing project. Note that it links to GLib, so must comply with the LGPL linking clauses. */
|
||||
#ifndef __VIPS_MARSHAL_H__
|
||||
#define __VIPS_MARSHAL_H__
|
||||
|
||||
#ifndef __vips_MARSHAL_H__
|
||||
#define __vips_MARSHAL_H__
|
||||
|
||||
#include <glib-object.h>
|
||||
#include <glib-object.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
/* INT:VOID (vipsmarshal.list:25) */
|
||||
extern void vips_INT__VOID (GClosure *closure,
|
||||
/* INT: VOID (vipsmarshal.list:25) */
|
||||
extern
|
||||
void vips_INT__VOID (GClosure *closure,
|
||||
GValue *return_value,
|
||||
guint n_param_values,
|
||||
const GValue *param_values,
|
||||
gpointer invocation_hint,
|
||||
gpointer marshal_data);
|
||||
|
||||
/* INT64: INT64, INT (vipsmarshal.list:26) */
|
||||
extern
|
||||
void vips_INT64__INT64_INT (GClosure *closure,
|
||||
GValue *return_value,
|
||||
guint n_param_values,
|
||||
const GValue *param_values,
|
||||
gpointer invocation_hint,
|
||||
gpointer marshal_data);
|
||||
|
||||
/* INT64: POINTER, INT64 (vipsmarshal.list:27) */
|
||||
extern
|
||||
void vips_INT64__POINTER_INT64 (GClosure *closure,
|
||||
GValue *return_value,
|
||||
guint n_param_values,
|
||||
const GValue *param_values,
|
||||
gpointer invocation_hint,
|
||||
gpointer marshal_data);
|
||||
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __vips_MARSHAL_H__ */
|
||||
|
||||
#endif /* __VIPS_MARSHAL_H__ */
|
||||
|
|
|
|||
|
|
@ -23,5 +23,5 @@
|
|||
# BOOL deprecated alias for BOOLEAN
|
||||
|
||||
INT: VOID
|
||||
|
||||
|
||||
INT64: INT64, INT
|
||||
INT64: POINTER, INT64
|
||||
|
|
|
|||
Loading…
Reference in New Issue