Merge branch 'add-stream-object' of github.com:libvips/libvips into add-stream-object

fuzz/test_fuzz.sh

@@ -3,7 +3,7 @@
 #set -x
 set -e
 
-# Glib is build without -fno-omit-frame-pointer. We need
+# Glib is built without -fno-omit-frame-pointer. We need
 # to disable the fast unwinder to get full stacktraces.
 export ASAN_OPTIONS="fast_unwind_on_malloc=0:allocator_may_return_null=1"
 export UBSAN_OPTIONS="print_stacktrace=1"

libvips/include/vips/stream.h

@@ -191,8 +191,11 @@ typedef struct _VipsStreamiClass {
 	 *
 	 * Unseekable streams should always return -1. VipsStreami will then
 	 * seek by _read()ing bytes into memory as required.
+	 *
+	 * We have to use int64 rather than off_t, since we must work on
+	 * Windows, where off_t can be 32-bits.
 	 */
-	gint64 (*seek)( VipsStreami *, gint64 offset, int );
+	gint64 (*seek)( VipsStreami *, gint64, int );
 
 } VipsStreamiClass;
 
@@ -217,6 +220,44 @@ size_t vips_streami_sniff_at_most( VipsStreami *streami,
 unsigned char *vips_streami_sniff( VipsStreami *streami, size_t length );
 gint64 vips_streami_size( VipsStreami *streami ); 
 
+#define VIPS_TYPE_STREAMIU (vips_streamiu_get_type())
+#define VIPS_STREAMIU( obj ) \
+	(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
+	VIPS_TYPE_STREAMIU, VipsStreamiu ))
+#define VIPS_STREAMIU_CLASS( klass ) \
+	(G_TYPE_CHECK_CLASS_CAST( (klass), \
+	VIPS_TYPE_STREAMIU, VipsStreamiuClass))
+#define VIPS_IS_STREAMIU( obj ) \
+	(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_STREAMIU ))
+#define VIPS_IS_STREAMIU_CLASS( klass ) \
+	(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_STREAMIU ))
+#define VIPS_STREAMIU_GET_CLASS( obj ) \
+	(G_TYPE_INSTANCE_GET_CLASS( (obj), \
+	VIPS_TYPE_STREAMIU, VipsStreamiuClass ))
+
+/* Subclass of streamiu with signals for handlers. This is supposed to be
+ * useful for language bindings.
+ */
+typedef struct _VipsStreamiu {
+	VipsStreami parent_object;
+
+} VipsStreamiu;
+
+typedef struct _VipsStreamiuClass {
+	VipsStreamiClass parent_class;
+
+	/* The action signals clients can use to implement read and seek.
+	 * We must use gint64 everywhere since there's no G_TYPE_SIZE.
+	 */
+
+	gint64 (*read)( VipsStreamiu *, void *, gint64 );
+	gint64 (*seek)( VipsStreamiu *, gint64, int );
+
+} VipsStreamiuClass;
+
+GType vips_streamiu_get_type( void );
+VipsStreamiu *vips_streamiu_new( void );
+
 #define VIPS_TYPE_STREAMO (vips_streamo_get_type())
 #define VIPS_STREAMO( obj ) \
 	(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
@@ -232,7 +273,9 @@ gint64 vips_streami_size( VipsStreami *streami );
 	(G_TYPE_INSTANCE_GET_CLASS( (obj), \
 	VIPS_TYPE_STREAMO, VipsStreamoClass ))
 
-#define VIPS_STREAMO_BUFFER_SIZE (4096)
+/* PNG writes in 8kb chunks, so we need to be a little larger than that.
+ */
+#define VIPS_STREAMO_BUFFER_SIZE (8500)
 
 /* Output to something like a socket, pipe or memory area. 
  */
@@ -241,13 +284,17 @@ typedef struct _VipsStreamo {
 
 	/*< private >*/
 
+	/* This stream should write to memory.
+	 */
+	gboolean memory;
+
 	/* The stream has been finished and can no longer be written.
 	 */
 	gboolean finished;
 
 	/* Write memory output here.
 	 */
-	GByteArray *memory;
+	GByteArray *memory_buffer;
 
 	/* And return memory via this blob.
 	 */
@@ -296,6 +343,45 @@ int vips_streamo_writef( VipsStreamo *streamo, const char *fmt, ... )
 	__attribute__((format(printf, 2, 3)));
 int vips_streamo_write_amp( VipsStreamo *streamo, const char *str );
 
+#define VIPS_TYPE_STREAMOU (vips_streamou_get_type())
+#define VIPS_STREAMOU( obj ) \
+	(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
+	VIPS_TYPE_STREAMOU, VipsStreamou ))
+#define VIPS_STREAMOU_CLASS( klass ) \
+	(G_TYPE_CHECK_CLASS_CAST( (klass), \
+	VIPS_TYPE_STREAMOU, VipsStreamouClass))
+#define VIPS_IS_STREAMOU( obj ) \
+	(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_STREAMOU ))
+#define VIPS_IS_STREAMOU_CLASS( klass ) \
+	(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_STREAMOU ))
+#define VIPS_STREAMOU_GET_CLASS( obj ) \
+	(G_TYPE_INSTANCE_GET_CLASS( (obj), \
+	VIPS_TYPE_STREAMOU, VipsStreamouClass ))
+
+#define VIPS_STREAMOU_BUFFER_SIZE (4096)
+
+/* Output to something like a socket, pipe or memory area. 
+ */
+typedef struct _VipsStreamou {
+	VipsStreamo parent_object;
+
+} VipsStreamou;
+
+typedef struct _VipsStreamouClass {
+	VipsStreamoClass parent_class;
+
+	/* The action signals clients can use to implement write and finish.
+	 * We must use gint64 everywhere since there's no G_TYPE_SIZE.
+	 */
+
+	gint64 (*write)( VipsStreamou *, const void *, gint64 );
+	void (*finish)( VipsStreamou * );
+
+} VipsStreamouClass;
+
+GType vips_streamou_get_type( void );
+VipsStreamou *vips_streamou_new( void );
+
 #ifdef __cplusplus
 }
 #endif /*__cplusplus*/

libvips/iofuncs/Makefile.am

@@ -3,7 +3,9 @@ noinst_LTLIBRARIES = libiofuncs.la
 libiofuncs_la_SOURCES = \
 	stream.c \
 	streami.c \
+	streamiu.c \
 	streamo.c \
+	streamou.c \
 	bufis.c \
 	dbuf.c \
 	reorder.c \
@@ -40,9 +42,9 @@ libiofuncs_la_SOURCES = \
 	system.c \
 	buffer.c 
 
-vipsmarshal.h:
+vipsmarshal.h: vipsmarshal.list
 	glib-genmarshal --prefix=vips --header vipsmarshal.list > vipsmarshal.h
-vipsmarshal.c:
+vipsmarshal.c: vipsmarshal.list
 	echo "#include \"vipsmarshal.h\"" > vipsmarshal.c 
 	glib-genmarshal --prefix=vips --body vipsmarshal.list >> vipsmarshal.c
 

libvips/iofuncs/init.c

@@ -331,7 +331,9 @@ vips_init( const char *argv0 )
 	extern GType sink_memory_thread_state_get_type( void ); 
 	extern GType render_thread_state_get_type( void ); 
 	extern GType vips_streami_get_type( void ); 
+	extern GType vips_streamiu_get_type( void ); 
 	extern GType vips_streamo_get_type( void ); 
+	extern GType vips_streamou_get_type( void ); 
 
 	static gboolean started = FALSE;
 	static gboolean done = FALSE;
@@ -447,7 +449,9 @@ vips_init( const char *argv0 )
 	(void) sink_memory_thread_state_get_type(); 
 	(void) render_thread_state_get_type(); 
 	(void) vips_streami_get_type(); 
+	(void) vips_streamiu_get_type(); 
 	(void) vips_streamo_get_type(); 
+	(void) vips_streamou_get_type(); 
 	vips__meta_init_types();
 	vips__interpolate_init();
 	im__format_init();

libvips/iofuncs/streami.c

@@ -33,10 +33,7 @@
 
 /* TODO
  *
- * - gaussblur is missing the vector path again argh
  * - can we map and then close the fd? how about on Windows?
- * - make a subclass that lets you set vfuncs as params, inc. close(),
- *   is_pipe etc.
  */
 
 /*
@@ -280,7 +277,6 @@ vips_streami_read_real( VipsStreami *streami, void *data, size_t length )
 	} while( bytes_read < 0 && errno == EINTR );
 
 	return( bytes_read );
-
 }
 
 static gint64

libvips/iofuncs/streamiu.c

@@ -0,0 +1,216 @@
+/* A Streami subclass with signals you can easily hook up to other input
+ * sources.
+ * 
+ * J.Cupitt, 21/11/19
+ */
+
+/*
+
+    This file is part of VIPS.
+    
+    VIPS is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301  USA
+
+ */
+
+/*
+
+    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
+
+ */
+
+/*
+#define VIPS_DEBUG
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /*HAVE_CONFIG_H*/
+#include <vips/intl.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif /*HAVE_UNISTD_H*/
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <vips/vips.h>
+#include <vips/internal.h>
+#include <vips/debug.h>
+
+#include "vipsmarshal.h"
+
+G_DEFINE_TYPE( VipsStreamiu, vips_streamiu, VIPS_TYPE_STREAMI );
+
+/* Our signals. 
+ */
+enum {
+	SIG_SEEK,		
+	SIG_READ,		
+	SIG_LAST
+};
+
+static guint vips_streamiu_signals[SIG_LAST] = { 0 };
+
+static ssize_t
+vips_streamiu_read_real( VipsStreami *streami, 
+	void *buffer, size_t length )
+{
+	gint64 bytes_read;
+
+	VIPS_DEBUG_MSG( "vips_streamiu_read_real:\n" );
+
+	/* Return value if no attached handler.
+	 */
+	bytes_read = 0;
+
+	g_signal_emit( streami, vips_streamiu_signals[SIG_READ], 0,
+		buffer, length, &bytes_read );
+
+	VIPS_DEBUG_MSG( "  %zd\n", bytes_read );
+
+	return( bytes_read );
+}
+
+static gint64
+vips_streamiu_seek_real( VipsStreami *streami, 
+	gint64 offset, int whence )
+{
+	gint64 new_position;
+
+	VIPS_DEBUG_MSG( "vips_streamiu_seek_real:\n" );
+
+	/* If there's no user action attached, we fail.
+	 */
+	new_position = -1;
+
+	g_signal_emit( streami, vips_streamiu_signals[SIG_SEEK], 0,
+		offset, whence, &new_position );
+
+	VIPS_DEBUG_MSG( "  %zd\n", new_position );
+
+	return( new_position );
+}
+
+static gint64
+vips_streamiu_read_signal_real( VipsStreamiu *streamiu, 
+	void *data, gint64 length )
+{
+	VIPS_DEBUG_MSG( "vips_streamiu_read_signal_real:\n" );
+
+	return( 0 );
+}
+
+static gint64
+vips_streamiu_seek_signal_real( VipsStreamiu *streamiu, 
+	gint64 offset, int whence )
+{
+	VIPS_DEBUG_MSG( "vips_streamiu_seek_signal_real:\n" );
+
+	return( -1 );
+}
+
+static void
+vips_streamiu_class_init( VipsStreamiuClass *class )
+{
+	VipsObjectClass *object_class = VIPS_OBJECT_CLASS( class );
+	VipsStreamiClass *streami_class = VIPS_STREAMI_CLASS( class );
+
+	object_class->nickname = "streamiu";
+	object_class->description = _( "input stream" );
+
+	streami_class->read = vips_streamiu_read_real;
+	streami_class->seek = vips_streamiu_seek_real;
+
+	class->read = vips_streamiu_read_signal_real;
+	class->seek = vips_streamiu_seek_signal_real;
+
+	/**
+	 * VipsStreamiu::read:
+	 * @streamiu: the stream being operated on
+	 * @buffer: %gpointer, buffer to fill
+	 * @size: %gint64, size of buffer
+	 *
+	 * This signal is emitted to read bytes from the source into @buffer.
+	 *
+	 * Returns: the number of bytes read.
+	 */
+	vips_streamiu_signals[SIG_READ] = g_signal_new( "read",
+		G_TYPE_FROM_CLASS( class ),
+		G_SIGNAL_ACTION,
+		G_STRUCT_OFFSET( VipsStreamiuClass, read ), 
+		NULL, NULL,
+		vips_INT64__INT64_INT,
+		G_TYPE_INT64, 2,
+		G_TYPE_INT64, G_TYPE_INT );
+
+	/**
+	 * VipsStreamiu::seek:
+	 * @streamiu: the stream being operated on
+	 * @offset: %gint64, seek offset
+	 * @whence: %gint, seek origin
+	 *
+	 * This signal is emitted to seek the stream. The handler should
+	 * change the stream position appropriately.
+	 *
+	 * The handler on an unseekable stream should always return -1.
+	 *
+	 * Returns: the new seek position.
+	 */
+	vips_streamiu_signals[SIG_SEEK] = g_signal_new( "seek",
+		G_TYPE_FROM_CLASS( class ),
+		G_SIGNAL_ACTION,
+		G_STRUCT_OFFSET( VipsStreamiuClass, seek ), 
+		NULL, NULL,
+		vips_INT64__POINTER_INT64,
+		G_TYPE_INT64, 2,
+		G_TYPE_POINTER, G_TYPE_INT64 );
+
+}
+
+static void
+vips_streamiu_init( VipsStreamiu *streamiu )
+{
+}
+
+/**
+ * vips_streamiu_new:
+ *
+ * Create a #VipsStreamiu. Attach signals to implement read and seek.
+ *
+ * Returns: a new #VipsStreamiu
+ */
+VipsStreamiu *
+vips_streamiu_new( void )
+{
+	VipsStreamiu *streamiu;
+
+	VIPS_DEBUG_MSG( "vips_streamiu_new:\n" );
+
+	streamiu = VIPS_STREAMIU( g_object_new( VIPS_TYPE_STREAMIU, NULL ) );
+
+	if( vips_object_build( VIPS_OBJECT( streamiu ) ) ) {
+		VIPS_UNREF( streamiu );
+		return( NULL );
+	}
+
+	return( streamiu ); 
+}

libvips/iofuncs/streamo.c

@@ -31,12 +31,6 @@
 
  */
 
-/* TODO
- *
- * - test we can really change all behaviour in the subclass ... add callbacks
- *   as well to make it simpler for language bindings
- */
-
 /*
 #define VIPS_DEBUG
  */
@@ -93,7 +87,7 @@ vips_streamo_finalize( GObject *gobject )
 
 	VIPS_DEBUG_MSG( "vips_streamo_finalize:\n" );
 
-	VIPS_FREEF( g_byte_array_unref, streamo->memory ); 
+	VIPS_FREEF( g_byte_array_unref, streamo->memory_buffer ); 
 	if( streamo->blob ) { 
 		vips_area_unref( VIPS_AREA( streamo->blob ) ); 
 		streamo->blob = NULL;
@@ -120,7 +114,7 @@ vips_streamo_build( VipsObject *object )
 		return( -1 ); 
 	}
 
-	if( vips_object_argument_isset( object, "filename" ) ) {
+	if( stream->filename ) { 
 		const char *filename = stream->filename;
 
 		int fd;
@@ -141,8 +135,8 @@ vips_streamo_build( VipsObject *object )
 		stream->descriptor = dup( stream->descriptor );
 		stream->close_descriptor = stream->descriptor;
 	}
-	else {
+	else if( streamo->memory ) {
-		streamo->memory = g_byte_array_new();
+		streamo->memory_buffer = g_byte_array_new();
 	}
 
 	return( 0 );
@@ -182,10 +176,17 @@ vips_streamo_class_init( VipsStreamoClass *class )
 	class->write = vips_streamo_write_real;
 	class->finish = vips_streamo_finish_real;
 
+	VIPS_ARG_BOOL( class, "memory", 3, 
+		_( "Memory" ), 
+		_( "File descriptor should output to memory" ),
+		VIPS_ARGUMENT_OPTIONAL_INPUT,
+		G_STRUCT_OFFSET( VipsStreamo, memory ),
+		FALSE );
+
 	/* SET_ALWAYS means that blob is set by C and the obj system is not
 	 * involved in creation or destruction. It can be read at any time.
 	 */
-	VIPS_ARG_BOXED( class, "blob", 3, 
+	VIPS_ARG_BOXED( class, "blob", 4, 
 		_( "Blob" ),
 		_( "Blob to save to" ),
 		VIPS_ARGUMENT_SET_ALWAYS, 
@@ -277,7 +278,9 @@ vips_streamo_new_to_memory( void )
 
 	VIPS_DEBUG_MSG( "vips_streamo_new_to_memory:\n" ); 
 
-	streamo = VIPS_STREAMO( g_object_new( VIPS_TYPE_STREAMO, NULL ) );
+	streamo = VIPS_STREAMO( g_object_new( VIPS_TYPE_STREAMO,
+		"memory", TRUE,
+		NULL ) );
 
 	if( vips_object_build( VIPS_OBJECT( streamo ) ) ) {
 		VIPS_UNREF( streamo );
@@ -293,11 +296,13 @@ vips_streamo_write_unbuffered( VipsStreamo *streamo,
 {
 	VipsStreamoClass *class = VIPS_STREAMO_GET_CLASS( streamo );
 
+	VIPS_DEBUG_MSG( "vips_streamo_write_unbuffered:\n" );
+
 	if( streamo->finished )
 		return( 0 );
 
-	if( streamo->memory ) 
+	if( streamo->memory_buffer ) 
-		g_byte_array_append( streamo->memory, data, length );
+		g_byte_array_append( streamo->memory_buffer, data, length );
 	else 
 		while( length > 0 ) { 
 			ssize_t n;
@@ -328,6 +333,8 @@ vips_streamo_flush( VipsStreamo *streamo )
 	g_assert( streamo->write_point >= 0 );
 	g_assert( streamo->write_point <= VIPS_STREAMO_BUFFER_SIZE );
 
+	VIPS_DEBUG_MSG( "vips_streamo_flush:\n" );
+
 	if( streamo->write_point > 0 ) {
 		if( vips_streamo_write_unbuffered( streamo, 
 			streamo->output_buffer, streamo->write_point ) )
@@ -397,13 +404,13 @@ vips_streamo_finish( VipsStreamo *streamo )
 
 	/* Move the stream buffer into the blob so it can be read out.
 	 */
-	if( streamo->memory ) {
+	if( streamo->memory_buffer ) {
 		unsigned char *data;
 		size_t length;
 
-		length = streamo->memory->len;
+		length = streamo->memory_buffer->len;
-		data = g_byte_array_free( streamo->memory, FALSE );
+		data = g_byte_array_free( streamo->memory_buffer, FALSE );
-		streamo->memory = NULL;
+		streamo->memory_buffer = NULL;
 		vips_blob_set( streamo->blob,
 			(VipsCallbackFn) g_free, data, length );
 	}
@@ -436,22 +443,22 @@ vips_streamo_steal( VipsStreamo *streamo, size_t *length )
 
 	(void) vips_streamo_flush( streamo );
 
-	if( !streamo->memory ||
+	if( !streamo->memory_buffer ||
 		streamo->finished ) {
 		if( length )
-			*length = streamo->memory->len;
+			*length = streamo->memory_buffer->len;
 
 		return( NULL );
 	}
 
 	if( length )
-		*length = streamo->memory->len;
+		*length = streamo->memory_buffer->len;
-	data = g_byte_array_free( streamo->memory, FALSE );
+	data = g_byte_array_free( streamo->memory_buffer, FALSE );
-	streamo->memory = NULL;
+	streamo->memory_buffer = NULL;
 
 	/* We must have a valid byte array or finish will fail.
 	 */
-	streamo->memory = g_byte_array_new();
+	streamo->memory_buffer = g_byte_array_new();
 
 	vips_streamo_finish( streamo );
 

libvips/iofuncs/streamou.c

@@ -0,0 +1,194 @@
+/* A Streamo subclass with signals you can easily hook up to other output
+ * sources.
+ * 
+ * J.Cupitt, 21/11/19
+ */
+
+/*
+
+    This file is part of VIPS.
+    
+    VIPS is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301  USA
+
+ */
+
+/*
+
+    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
+
+ */
+
+/*
+#define VIPS_DEBUG
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /*HAVE_CONFIG_H*/
+#include <vips/intl.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif /*HAVE_UNISTD_H*/
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <vips/vips.h>
+#include <vips/internal.h>
+#include <vips/debug.h>
+
+#include "vipsmarshal.h"
+
+G_DEFINE_TYPE( VipsStreamou, vips_streamou, VIPS_TYPE_STREAMO );
+
+/* Our signals. 
+ */
+enum {
+	SIG_WRITE,		
+	SIG_FINISH,		
+	SIG_LAST
+};
+
+static guint vips_streamou_signals[SIG_LAST] = { 0 };
+
+static ssize_t
+vips_streamou_write_real( VipsStreamo *streamo, 
+	const void *data, size_t length )
+{
+	gint64 bytes_written;
+
+	VIPS_DEBUG_MSG( "vips_streamou_write_real:\n" );
+
+	/* Return value if no attached handler.
+	 */
+	bytes_written = 0;
+
+	g_signal_emit( streamo, vips_streamou_signals[SIG_WRITE], 0,
+		data, length, &bytes_written );
+
+	VIPS_DEBUG_MSG( "  %zd\n", bytes_written );
+
+	return( bytes_written );
+}
+
+static void
+vips_streamou_finish_real( VipsStreamo *streamo )
+{
+	VIPS_DEBUG_MSG( "vips_streamou_seek_real:\n" );
+
+	g_signal_emit( streamo, vips_streamou_signals[SIG_FINISH], 0 );
+}
+
+static gint64
+vips_streamou_write_signal_real( VipsStreamou *streamou, 
+	const void *data, gint64 length )
+{
+	VIPS_DEBUG_MSG( "vips_streamou_write_signal_real:\n" );
+
+	return( 0 );
+}
+
+static void
+vips_streamou_finish_signal_real( VipsStreamou *streamou ) 
+{
+	VIPS_DEBUG_MSG( "vips_streamou_finish_signal_real:\n" );
+}
+
+static void
+vips_streamou_class_init( VipsStreamouClass *class )
+{
+	VipsObjectClass *object_class = VIPS_OBJECT_CLASS( class );
+	VipsStreamoClass *streamo_class = VIPS_STREAMO_CLASS( class );
+
+	object_class->nickname = "streamou";
+	object_class->description = _( "input stream" );
+
+	streamo_class->write = vips_streamou_write_real;
+	streamo_class->finish = vips_streamou_finish_real;
+
+	class->write = vips_streamou_write_signal_real;
+	class->finish = vips_streamou_finish_signal_real;
+
+	/**
+	 * VipsStreamou::write:
+	 * @streamou: the stream being operated on
+	 * @data: %pointer, bytes to write
+	 * @length: %gint64, number of bytes
+	 *
+	 * This signal is emitted to write bytes to the stream. 
+	 *
+	 * Returns: the number of bytes written.
+	 */
+	vips_streamou_signals[SIG_WRITE] = g_signal_new( "write",
+		G_TYPE_FROM_CLASS( class ),
+		G_SIGNAL_ACTION,
+		G_STRUCT_OFFSET( VipsStreamouClass, write ), 
+		NULL, NULL,
+		vips_INT64__POINTER_INT64,
+		G_TYPE_INT64, 2,
+		G_TYPE_POINTER, G_TYPE_INT64 );
+
+	/**
+	 * VipsStreamou::finish:
+	 * @streamou: the stream being operated on
+	 *
+	 * This signal is emitted at the end of write. The stream should do
+	 * any finishing necessary.
+	 */
+	vips_streamou_signals[SIG_FINISH] = g_signal_new( "finish",
+		G_TYPE_FROM_CLASS( class ),
+		G_SIGNAL_ACTION,
+		G_STRUCT_OFFSET( VipsStreamouClass, finish ), 
+		NULL, NULL,
+		g_cclosure_marshal_VOID__VOID,
+		G_TYPE_NONE, 0 );
+
+}
+
+static void
+vips_streamou_init( VipsStreamou *streamou )
+{
+}
+
+/**
+ * vips_streamou_new:
+ *
+ * Create a #VipsStreamou. Attach signals to implement write and finish.
+ *
+ * Returns: a new #VipsStreamou
+ */
+VipsStreamou *
+vips_streamou_new( void )
+{
+	VipsStreamou *streamou;
+
+	VIPS_DEBUG_MSG( "vips_streamou_new:\n" );
+
+	streamou = VIPS_STREAMOU( g_object_new( VIPS_TYPE_STREAMOU, NULL ) );
+
+	if( vips_object_build( VIPS_OBJECT( streamou ) ) ) {
+		VIPS_UNREF( streamou );
+		return( NULL );
+	}
+
+	return( streamou ); 
+}

libvips/iofuncs/vipsmarshal.c

@@ -1,7 +1,6 @@
 #include "vipsmarshal.h"
-
+/* 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. */
-#include	<glib-object.h>
+#include <glib-object.h>
-
 
 #ifdef G_ENABLE_DEBUG
 #define g_marshal_value_peek_boolean(v)  g_value_get_boolean (v)
@@ -49,21 +48,20 @@
 #define g_marshal_value_peek_variant(v)  (v)->data[0].v_pointer
 #endif /* !G_ENABLE_DEBUG */
 
-
+/* INT: VOID (vipsmarshal.list:25) */
-/* INT:VOID (vipsmarshal.list:25) */
 void
 vips_INT__VOID (GClosure     *closure,
-                GValue       *return_value G_GNUC_UNUSED,
+                GValue       *return_value,
                 guint         n_param_values,
                 const GValue *param_values,
                 gpointer      invocation_hint G_GNUC_UNUSED,
                 gpointer      marshal_data)
 {
-  typedef gint (*GMarshalFunc_INT__VOID) (gpointer     data1,
+  typedef gint (*GMarshalFunc_INT__VOID) (gpointer data1,
-                                          gpointer     data2);
+                                          gpointer data2);
-  register GMarshalFunc_INT__VOID callback;
+  GCClosure *cc = (GCClosure *) closure;
-  register GCClosure *cc = (GCClosure*) closure;
+  gpointer data1, data2;
-  register gpointer data1, data2;
+  GMarshalFunc_INT__VOID callback;
   gint v_return;
 
   g_return_if_fail (return_value != NULL);
@@ -87,3 +85,85 @@ vips_INT__VOID (GClosure     *closure,
   g_value_set_int (return_value, v_return);
 }
 
+/* INT64: INT64, INT (vipsmarshal.list:26) */
+void
+vips_INT64__INT64_INT (GClosure     *closure,
+                       GValue       *return_value,
+                       guint         n_param_values,
+                       const GValue *param_values,
+                       gpointer      invocation_hint G_GNUC_UNUSED,
+                       gpointer      marshal_data)
+{
+  typedef gint64 (*GMarshalFunc_INT64__INT64_INT) (gpointer data1,
+                                                   gint64 arg1,
+                                                   gint arg2,
+                                                   gpointer data2);
+  GCClosure *cc = (GCClosure *) closure;
+  gpointer data1, data2;
+  GMarshalFunc_INT64__INT64_INT 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__INT64_INT) (marshal_data ? marshal_data : cc->callback);
+
+  v_return = callback (data1,
+                       g_marshal_value_peek_int64 (param_values + 1),
+                       g_marshal_value_peek_int (param_values + 2),
+                       data2);
+
+  g_value_set_int64 (return_value, v_return);
+}
+
+/* INT64: POINTER, INT64 (vipsmarshal.list:27) */
+void
+vips_INT64__POINTER_INT64 (GClosure     *closure,
+                           GValue       *return_value,
+                           guint         n_param_values,
+                           const GValue *param_values,
+                           gpointer      invocation_hint G_GNUC_UNUSED,
+                           gpointer      marshal_data)
+{
+  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);
+}
+

libvips/iofuncs/vipsmarshal.h

@@ -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__
+#include <glib-object.h>
-#define __vips_MARSHAL_H__
-
-#include	<glib-object.h>
 
 G_BEGIN_DECLS
 
-/* INT:VOID (vipsmarshal.list:25) */
+/* INT: VOID (vipsmarshal.list:25) */
-extern void vips_INT__VOID (GClosure     *closure,
+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__ */
-

libvips/iofuncs/vipsmarshal.list

@@ -23,5 +23,5 @@
 #   BOOL        deprecated alias for BOOLEAN
 
 INT: VOID
-
+INT64: INT64, INT
-
+INT64: POINTER, INT64