diff options
Diffstat (limited to 'vendor/github.com/superseriousbusiness/go-jpeg-image-structure/v2/media_parser.go')
-rw-r--r-- | vendor/github.com/superseriousbusiness/go-jpeg-image-structure/v2/media_parser.go | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/vendor/github.com/superseriousbusiness/go-jpeg-image-structure/v2/media_parser.go b/vendor/github.com/superseriousbusiness/go-jpeg-image-structure/v2/media_parser.go deleted file mode 100644 index e6fc60bc4..000000000 --- a/vendor/github.com/superseriousbusiness/go-jpeg-image-structure/v2/media_parser.go +++ /dev/null @@ -1,139 +0,0 @@ -package jpegstructure - -import ( - "bufio" - "bytes" - "image" - "io" - "os" - - "image/jpeg" - - "github.com/dsoprea/go-logging" - "github.com/dsoprea/go-utility/v2/image" -) - -// JpegMediaParser is a `riimage.MediaParser` that knows how to parse JPEG -// images. -type JpegMediaParser struct { -} - -// NewJpegMediaParser returns a new JpegMediaParser. -func NewJpegMediaParser() *JpegMediaParser { - - // TODO(dustin): Add test - - return new(JpegMediaParser) -} - -// Parse parses a JPEG uses an `io.ReadSeeker`. Even if it fails, it will return -// the list of segments encountered prior to the failure. -func (jmp *JpegMediaParser) Parse(rs io.ReadSeeker, size int) (ec riimage.MediaContext, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - s := bufio.NewScanner(rs) - - // Since each segment can be any size, our buffer must allowed to grow as - // large as the file. - buffer := []byte{} - s.Buffer(buffer, size) - - js := NewJpegSplitter(nil) - s.Split(js.Split) - - for s.Scan() != false { - } - - // Always return the segments that were parsed, at least until there was an - // error. - ec = js.Segments() - - log.PanicIf(s.Err()) - - return ec, nil -} - -// ParseFile parses a JPEG file. Even if it fails, it will return the list of -// segments encountered prior to the failure. -func (jmp *JpegMediaParser) ParseFile(filepath string) (ec riimage.MediaContext, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - f, err := os.Open(filepath) - log.PanicIf(err) - - defer f.Close() - - stat, err := f.Stat() - log.PanicIf(err) - - size := stat.Size() - - sl, err := jmp.Parse(f, int(size)) - - // Always return the segments that were parsed, at least until there was an - // error. - ec = sl - - log.PanicIf(err) - - return ec, nil -} - -// ParseBytes parses a JPEG byte-slice. Even if it fails, it will return the -// list of segments encountered prior to the failure. -func (jmp *JpegMediaParser) ParseBytes(data []byte) (ec riimage.MediaContext, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - br := bytes.NewReader(data) - - sl, err := jmp.Parse(br, len(data)) - - // Always return the segments that were parsed, at least until there was an - // error. - ec = sl - - log.PanicIf(err) - - return ec, nil -} - -// LooksLikeFormat indicates whether the data looks like a JPEG image. -func (jmp *JpegMediaParser) LooksLikeFormat(data []byte) bool { - if len(data) < 4 { - return false - } - - l := len(data) - if data[0] != 0xff || data[1] != MARKER_SOI || data[l-2] != 0xff || data[l-1] != MARKER_EOI { - return false - } - - return true -} - -// GetImage returns an image.Image-compatible struct. -func (jmp *JpegMediaParser) GetImage(r io.Reader) (img image.Image, err error) { - img, err = jpeg.Decode(r) - log.PanicIf(err) - - return img, nil -} - -var ( - // Enforce interface conformance. - _ riimage.MediaParser = new(JpegMediaParser) -) |