diff options
| author | Carl Hetherington <cth@carlh.net> | 2012-08-30 22:49:58 +0100 |
|---|---|---|
| committer | Carl Hetherington <cth@carlh.net> | 2012-08-30 22:49:58 +0100 |
| commit | 233a81ed87d512c2af9bb8ca3d9e78be86372054 (patch) | |
| tree | e5916be38f70bdf696a8c61769ee23e548c38a06 /src/picture_frame.cc | |
| parent | a1824e65aea9bfec655ea19ef9cbc71b9d3ec9d1 (diff) | |
Untested code to optionally reduce resolution on extracting image frames.
Diffstat (limited to 'src/picture_frame.cc')
| -rw-r--r-- | src/picture_frame.cc | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/src/picture_frame.cc b/src/picture_frame.cc index 87502e5e..06788da5 100644 --- a/src/picture_frame.cc +++ b/src/picture_frame.cc @@ -54,14 +54,19 @@ MonoPictureFrame::~MonoPictureFrame () delete _buffer; } -/** @return An ARGB representation of this frame. This is ARGB in the +/** @param reduce a factor by which to reduce the resolution + * of the image, expressed as a power of two (pass 0 for no + * reduction). + * + * @return An ARGB representation of this frame. This is ARGB in the * Cairo sense, so that each pixel takes up 4 bytes; the first byte * is blue, second green, third red and fourth alpha (always 255). + * */ shared_ptr<ARGBFrame> -MonoPictureFrame::argb_frame () const +MonoPictureFrame::argb_frame (int reduce) const { - opj_image_t* xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->RoData()), _buffer->Size()); + opj_image_t* xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->RoData()), _buffer->Size(), reduce); assert (xyz_frame->numcomps == 3); shared_ptr<ARGBFrame> f = xyz_to_rgb (xyz_frame); opj_image_destroy (xyz_frame); @@ -92,23 +97,28 @@ StereoPictureFrame::~StereoPictureFrame () delete _buffer; } -/** @return An ARGB representation of one of the eyes (left or right) +/** @param reduce a factor by which to reduce the resolution + * of the image, expressed as a power of two (pass 0 for no + * reduction). + * + * @param eye Eye to return (EYE_LEFT or EYE_RIGHT). + * + * @return An ARGB representation of one of the eyes (left or right) * of this frame. This is ARGB in the Cairo sense, so that each * pixel takes up 4 bytes; the first byte is blue, second green, * third red and fourth alpha (always 255). * - * @param eye Eye to return (EYE_LEFT or EYE_RIGHT). */ shared_ptr<ARGBFrame> -StereoPictureFrame::argb_frame (Eye eye) const +StereoPictureFrame::argb_frame (Eye eye, int reduce) const { opj_image_t* xyz_frame = 0; switch (eye) { case LEFT: - xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Left.RoData()), _buffer->Left.Size()); + xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Left.RoData()), _buffer->Left.Size(), reduce); break; case RIGHT: - xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Right.RoData()), _buffer->Right.Size()); + xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Right.RoData()), _buffer->Right.Size(), reduce); break; } |