basic webp load done
This commit is contained in:
John Cupitt
parent
878c196341
commit
165e7c9717
@ -7,6 +7,7 @@
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- added vips_error_freeze() / vips_error_thaw()
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- used freeze() / thaw() to stop file format sniffers logging spurious errors
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- vipsthumbnail uses embedded jpg thumbnails if it can
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- added vips_webpload(), vips_webpload_buffer()
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3/7/13 started 7.34.2
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- lower priority for Matlab load to reduce segvs from Mat_Open(), thanks
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@ -689,14 +689,14 @@ fi
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# Gather all up for VIPS_CFLAGS, VIPS_INCLUDES, VIPS_LIBS and VIPS_CXX_LIBS
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# sort includes to get longer, more specific dirs first
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# helps, for example, selecting graphicsmagick over imagemagick
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VIPS_CFLAGS=`for i in $VIPS_CFLAGS $GTHREAD_CFLAGS $REQUIRED_CFLAGS $PANGOFT2_CFLAGS $FFTW_CFLAGS $MAGICK_CFLAGS $PNG_CFLAGS $EXIF_CFLAGS $MATIO_CFLAGS $CFITSIO_CFLAGS $OPENEXR_CFLAGS $OPENSLIDE_CFLAGS $ORC_CFLAGS $TIFF_CFLAGS $LCMS_CFLAGS
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VIPS_CFLAGS=`for i in $VIPS_CFLAGS $GTHREAD_CFLAGS $REQUIRED_CFLAGS $PANGOFT2_CFLAGS $FFTW_CFLAGS $MAGICK_CFLAGS $PNG_CFLAGS $EXIF_CFLAGS $MATIO_CFLAGS $CFITSIO_CFLAGS $LIBWEBP_CFLAGS $OPENEXR_CFLAGS $OPENSLIDE_CFLAGS $ORC_CFLAGS $TIFF_CFLAGS $LCMS_CFLAGS
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do
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echo $i
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done | sort -ru`
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VIPS_CFLAGS=`echo $VIPS_CFLAGS`
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VIPS_CFLAGS="$VIPS_DEBUG_FLAGS $VIPS_CFLAGS"
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VIPS_INCLUDES="$PNG_INCLUDES $TIFF_INCLUDES $ZIP_INCLUDES $JPEG_INCLUDES"
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VIPS_LIBS="$MAGICK_LIBS $PNG_LIBS $TIFF_LIBS $ZIP_LIBS $JPEG_LIBS $GTHREAD_LIBS $REQUIRED_LIBS $PANGOFT2_LIBS $FFTW_LIBS $ORC_LIBS $LCMS_LIBS $OPENEXR_LIBS $OPENSLIDE_LIBS $CFITSIO_LIBS $MATIO_LIBS $EXIF_LIBS -lm"
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VIPS_LIBS="$MAGICK_LIBS $PNG_LIBS $TIFF_LIBS $ZIP_LIBS $JPEG_LIBS $GTHREAD_LIBS $REQUIRED_LIBS $PANGOFT2_LIBS $FFTW_LIBS $ORC_LIBS $LCMS_LIBS $OPENEXR_LIBS $OPENSLIDE_LIBS $CFITSIO_LIBS $LIBWEBP_LIBS $MATIO_LIBS $EXIF_LIBS -lm"
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# we need this to generate paths in swig/python/setup.py.in
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AC_SUBST(top_srcdir)
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@ -32,9 +32,9 @@
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*/
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/*
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*/
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#define DEBUG_VERBOSE
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#define DEBUG
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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@ -43,20 +43,116 @@
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#ifdef HAVE_LIBWEBP
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#include <stdlib.h>
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#include <webp/decode.h>
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#include <vips/vips.h>
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#include "webp.h"
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/* How many bytes do we need to read from the start of the file to be able to
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* validate the header?
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*
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* This doesn't seem to be documented anywhere :-( guess a value.
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*/
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#define MINIMAL_HEADER (100)
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/* What we track during a read.
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*/
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typedef struct {
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/* File source.
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*/
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char *filename;
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/* Memory source.
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*/
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void *buf;
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size_t len;
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/* Decoder config.
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*/
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WebPDecoderConfig config;
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/* Incremental decoder state.
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*/
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WebPIDecoder *idec;
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} Read;
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int
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vips__iswebp( const char *filename )
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{
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unsigned char buf[2];
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unsigned char header[MINIMAL_HEADER];
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if( vips__get_bytes( filename, buf, 2 ) )
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if( (int) buf[0] == 0xff && (int) buf[1] == 0xd8 )
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return( 1 );
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if( vips__get_bytes( filename, header, MINIMAL_HEADER ) &&
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WebPGetInfo( header, MINIMAL_HEADER, NULL, NULL ) )
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return( 1 );
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return( 0 );
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}
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static int
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read_free( Read *read )
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{
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VIPS_FREE( read->filename );
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VIPS_FREEF( WebPIDelete, read->idec );
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WebPFreeDecBuffer( &read->config.output );
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VIPS_FREE( read );
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return( 0 );
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}
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static Read *
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read_new( const char *filename, void *buf, size_t len )
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{
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Read *read;
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unsigned char header[MINIMAL_HEADER];
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if( !(read = VIPS_NEW( NULL, Read )) )
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return( NULL );
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read->filename = g_strdup( filename );
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read->buf = buf;
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read->len = len;
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read->idec = NULL;
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WebPInitDecoderConfig( &read->config );
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if( filename ) {
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if( vips__get_bytes( filename, header, MINIMAL_HEADER ) &&
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WebPGetFeatures( header, MINIMAL_HEADER,
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&read->config.input ) != VP8_STATUS_OK ) {
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read_free( read );
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return( NULL );
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}
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}
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else {
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if( WebPGetFeatures( read->buf, read->len,
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&read->config.input ) != VP8_STATUS_OK ) {
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read_free( read );
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return( NULL );
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}
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}
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if( read->config.input.has_alpha )
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read->config.output.colorspace = MODE_RGBA;
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else
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read->config.output.colorspace = MODE_RGB;
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read->config.options.use_threads = TRUE;
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return( read );
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}
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static int
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read_header( Read *read, VipsImage *out )
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{
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vips_image_init_fields( out,
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read->config.input.width, read->config.input.height,
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read->config.input.has_alpha ? 4 : 3,
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VIPS_FORMAT_UCHAR, VIPS_CODING_NONE,
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VIPS_INTERPRETATION_sRGB,
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1.0, 1.0 );
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vips_demand_hint( out, VIPS_DEMAND_STYLE_THINSTRIP, NULL );
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return( 0 );
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}
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@ -64,7 +160,65 @@ vips__iswebp( const char *filename )
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int
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vips__webp_read_file_header( const char *filename, VipsImage *out )
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{
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printf( "vips__webp_read_file_header\n" );
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Read *read;
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if( !(read = read_new( filename, NULL, 0 )) ) {
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vips_error( "webp2vips",
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_( "unable to open \"%s\"" ), filename );
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return( -1 );
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}
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if( read_header( read, out ) )
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return( -1 );
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read_free( read );
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return( 0 );
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}
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typedef uint8_t *(*webp_reader)( const uint8_t* data, size_t data_size,
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uint8_t* output_buffer, size_t output_buffer_size,
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int output_stride );
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static int
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read_image( Read *read, VipsImage *out )
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{
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VipsImage **t = (VipsImage **)
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vips_object_local_array( VIPS_OBJECT( out ), 3 );
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char *data;
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unsigned int len;
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webp_reader reader;
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/* libwebp makes streaming very hard. We have to read to a full memory
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* buffer, then copy to out.
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*/
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t[0] = vips_image_new_buffer();
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if( read_header( read, t[0] ) )
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return( -1 );
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if( vips_image_write_prepare( t[0] ) )
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return( -1 );
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if( !(data = vips__file_read_name( read->filename, NULL, &len )) )
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return( -1 );
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if( t[0]->Bands == 3 )
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reader = WebPDecodeRGBInto;
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else
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reader = WebPDecodeRGBAInto;
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if( !reader( (uint8_t *) data, len,
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VIPS_IMAGE_ADDR( t[0], 0, 0 ),
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VIPS_IMAGE_SIZEOF_IMAGE( t[0] ),
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VIPS_IMAGE_SIZEOF_LINE( t[0] ) ) ) {
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g_free( data );
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vips_error( "webp2vips", "%s", _( "unable to read pixels" ) );
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return( -1 );
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}
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g_free( data );
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if( vips_image_write( t[0], out ) )
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return( -1 );
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return( 0 );
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}
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@ -72,7 +226,18 @@ vips__webp_read_file_header( const char *filename, VipsImage *out )
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int
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vips__webp_read_file( const char *filename, VipsImage *out )
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{
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printf( "vips__webp_read_file\n" );
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Read *read;
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if( !(read = read_new( filename, NULL, 0 )) ) {
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vips_error( "webp2vips",
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_( "unable to open \"%s\"" ), filename );
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return( -1 );
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}
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if( read_image( read, out ) )
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return( -1 );
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read_free( read );
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return( 0 );
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}
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@ -80,7 +245,18 @@ vips__webp_read_file( const char *filename, VipsImage *out )
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int
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vips__webp_read_buffer_header( void *buf, size_t len, VipsImage *out )
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{
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printf( "vips__webp_read_buffer_header\n" );
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Read *read;
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if( !(read = read_new( NULL, buf, len )) ) {
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vips_error( "webp2vips",
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"%s", _( "unable to open buffer" ) );
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return( -1 );
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}
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if( read_header( read, out ) )
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return( -1 );
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read_free( read );
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return( 0 );
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}
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@ -88,11 +264,18 @@ vips__webp_read_buffer_header( void *buf, size_t len, VipsImage *out )
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int
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vips__webp_read_buffer( void *buf, size_t len, VipsImage *out )
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{
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printf( "vips__webp_read_buffer\n" );
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Read *read;
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if( !(read = read_new( NULL, buf, len )) ) {
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vips_error( "webp2vips",
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"%s", _( "unable to open buffer" ) );
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return( -1 );
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}
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if( read_image( read, out ) )
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return( -1 );
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return( 0 );
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}
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#endif /*HAVE_LIBWEBP*/
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@ -37,9 +37,9 @@
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*/
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/*
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*/
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#define VIPS_DEBUG
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#define DEBUG
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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