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mpv/sub/img_convert.h

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sub: allow rendering OSD in ASS image format directly, simplify Before this commit, the OSD was drawn using libass, but the resulting bitmaps were converted to the internal mplayer OSD format. We want to get rid of the old OSD format, because it's monochrome, and can't even be rendered directly using modern video output methods (like with OpenGL/Direct3D/VDPAU). Change it so that VOs can get the ASS images directly, without additional conversions. (This also has the consequence that the OSD can render colors now.) Currently, this is vo_gl3 only. The other VOs still use the old method. Also, the old OSD format is still used for all VOs with DVD subtitles (spudec). Rewrite sub.c. Remove all the awkward flags and bounding boxes and change detection things. It turns out that much of that isn't needed. Move code related to converting subtitle images to img_convert.c. (It has to be noted that all of these conversions were already done before in some places, and that the new code actually makes less use of them.)
2012-09-28 19:38:52 +00:00
#ifndef MPLAYER_SUB_IMG_CONVERT_H
#define MPLAYER_SUB_IMG_CONVERT_H
#include <stdbool.h>
struct osd_conv_cache;
struct sub_bitmaps;
img_convert: add sub_bitmap bounding box functions mp_sub_bitmaps_bb is just sub_bitmaps_bb renamed/moved.
2012-12-28 14:46:23 +00:00
struct mp_rect;
sub: allow rendering OSD in ASS image format directly, simplify Before this commit, the OSD was drawn using libass, but the resulting bitmaps were converted to the internal mplayer OSD format. We want to get rid of the old OSD format, because it's monochrome, and can't even be rendered directly using modern video output methods (like with OpenGL/Direct3D/VDPAU). Change it so that VOs can get the ASS images directly, without additional conversions. (This also has the consequence that the OSD can render colors now.) Currently, this is vo_gl3 only. The other VOs still use the old method. Also, the old OSD format is still used for all VOs with DVD subtitles (spudec). Rewrite sub.c. Remove all the awkward flags and bounding boxes and change detection things. It turns out that much of that isn't needed. Move code related to converting subtitle images to img_convert.c. (It has to be noted that all of these conversions were already done before in some places, and that the new code actually makes less use of them.)
2012-09-28 19:38:52 +00:00
struct osd_conv_cache *osd_conv_cache_new(void);
// These functions convert from one OSD format to another. On success, they copy
// the converted image data into c, and change imgs to point to the data.
sub: never decode subs to old OSD format Instead, sd_lavc.c and spudec.c (the two image sub decoders) always output indexed/paletted images. For this purpose, add SUBBITMAP_INDEXED, and convert the subs to RGBA in img_convert.c instead. If a VO is used that supports the old OSD format only, the indexed bitmaps are converted to the old OSD format by abusing spudec.c in a similar way sd_lavc.c used to do. The main reason why spudec.c is used is because the images must not only be converted to the old format, but also properly scaled, cropped, and aligned (the asm code in libvo/osd.c requires this alignment). Remove support for the old format (packed variant) from the OpenGL VOs. (The packed formats were how the actual OSD format was handled in some GPU-driven VOs for a while.) Remove all conversions from old to new formats. Now all subtitle decoders and OSD renderers produce the new formats only. Add an evil hack to convert the new format (scaled+indexed bitmaps) to the old format. It creates a new spudec instance to convert images to grayscale and to scale them. This is temporary for VOs which don't support new OSD formats yet (vo_xv, vo_x11, vo_lavc).
2012-10-04 15:16:47 +00:00
bool osd_conv_idx_to_rgba(struct osd_conv_cache *c, struct sub_bitmaps *imgs);
sub: support straight alpha additionally to premultiplied alpha This is for VAAPI support. VAAPI does not support premultiplied alpha for OSD. (Normally, we prefer premultiplied, because it has better behavior on scaling.) I'm not sure whether blending in the ASS->RGBA part is correct and I didn't test it extensively.
2013-08-09 20:59:36 +00:00
bool osd_conv_idx_to_rgba_str(struct osd_conv_cache *c, struct sub_bitmaps *imgs);
sub: add ASS to RGBA conversion This makes implementing new VOs easier, because they don't have to support the ASS format.
2012-12-11 15:24:24 +00:00
bool osd_conv_ass_to_rgba(struct osd_conv_cache *c, struct sub_bitmaps *imgs);
sub: support straight alpha additionally to premultiplied alpha This is for VAAPI support. VAAPI does not support premultiplied alpha for OSD. (Normally, we prefer premultiplied, because it has better behavior on scaling.) I'm not sure whether blending in the ASS->RGBA part is correct and I didn't test it extensively.
2013-08-09 20:59:36 +00:00
bool osd_conv_ass_to_rgba_str(struct osd_conv_cache *c, struct sub_bitmaps *imgs);
sub: add --sub-gray option to display image subs in grayscale MPlayer/mplayer2 still show DVD subtitles in gray. Depending on who you ask, this can be considered a bug or a feature. Include rendering in gray as explicit feature, so the user can decide what is better. This affects all indexed sub bitmaps entering the OSD rendering path. Currently, this means all image subs are affected by this option, but nothing else.
2012-11-25 22:32:35 +00:00
// Sub postprocessing
sub: reimplement -spugauss as --sub-gauss Apparently the -spugauss option was popular. The code originally implementing this is gone (scaler stuff in spudec.c). Reimplement it using libswscale to scale and blur image subtitles if the --sub-gauss option is set. The code does some rather lazy padding to allow the blur to spread pixels past the original image bounding box. (This problem exists with normal bilinear scaling too, but is barely noticable.) Technically, this doesn't just blur subtitles, but anything RGBA (or indexed) that enters the OSD rendering path. But only image subtitles produce these OSD formats currently, so no explicit check is done to prevent blurring in other cases.
2012-11-24 23:06:16 +00:00
bool osd_conv_blur_rgba(struct osd_conv_cache *c, struct sub_bitmaps *imgs,
double gblur);
img_convert: add function to scale RGBA OSD images
2013-08-09 22:27:41 +00:00
bool osd_scale_rgba(struct osd_conv_cache *c, struct sub_bitmaps *imgs);
sub: add --sub-gray option to display image subs in grayscale MPlayer/mplayer2 still show DVD subtitles in gray. Depending on who you ask, this can be considered a bug or a feature. Include rendering in gray as explicit feature, so the user can decide what is better. This affects all indexed sub bitmaps entering the OSD rendering path. Currently, this means all image subs are affected by this option, but nothing else.
2012-11-25 22:32:35 +00:00
bool osd_conv_idx_to_gray(struct osd_conv_cache *c, struct sub_bitmaps *imgs);
sub: allow rendering OSD in ASS image format directly, simplify Before this commit, the OSD was drawn using libass, but the resulting bitmaps were converted to the internal mplayer OSD format. We want to get rid of the old OSD format, because it's monochrome, and can't even be rendered directly using modern video output methods (like with OpenGL/Direct3D/VDPAU). Change it so that VOs can get the ASS images directly, without additional conversions. (This also has the consequence that the OSD can render colors now.) Currently, this is vo_gl3 only. The other VOs still use the old method. Also, the old OSD format is still used for all VOs with DVD subtitles (spudec). Rewrite sub.c. Remove all the awkward flags and bounding boxes and change detection things. It turns out that much of that isn't needed. Move code related to converting subtitle images to img_convert.c. (It has to be noted that all of these conversions were already done before in some places, and that the new code actually makes less use of them.)
2012-09-28 19:38:52 +00:00
img_convert: add sub_bitmap bounding box functions mp_sub_bitmaps_bb is just sub_bitmaps_bb renamed/moved.
2012-12-28 14:46:23 +00:00
bool mp_sub_bitmaps_bb(struct sub_bitmaps *imgs, struct mp_rect *out_bb);
// Intentionally limit the maximum number of bounding rects to something low.
// This prevents the algorithm from degrading to O(N^2).
// Most subtitles yield a very low number of bounding rects (<5).
#define MP_SUB_BB_LIST_MAX 15
int mp_get_sub_bb_list(struct sub_bitmaps *sbs, struct mp_rect *out_rc_list,
int rc_list_count);
sub: allow rendering OSD in ASS image format directly, simplify Before this commit, the OSD was drawn using libass, but the resulting bitmaps were converted to the internal mplayer OSD format. We want to get rid of the old OSD format, because it's monochrome, and can't even be rendered directly using modern video output methods (like with OpenGL/Direct3D/VDPAU). Change it so that VOs can get the ASS images directly, without additional conversions. (This also has the consequence that the OSD can render colors now.) Currently, this is vo_gl3 only. The other VOs still use the old method. Also, the old OSD format is still used for all VOs with DVD subtitles (spudec). Rewrite sub.c. Remove all the awkward flags and bounding boxes and change detection things. It turns out that much of that isn't needed. Move code related to converting subtitle images to img_convert.c. (It has to be noted that all of these conversions were already done before in some places, and that the new code actually makes less use of them.)
2012-09-28 19:38:52 +00:00
#endif