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allow different backends to specify their own padding requirements #1722

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nick black 2021-07-02 22:09:58 -04:00
parent a749ede622
commit d8c37337d9
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GPG Key ID: 5F43400C21CBFACC
3 changed files with 13 additions and 11 deletions
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1
src/lib/internal.h
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@ -1759,6 +1759,7 @@ typedef struct ncvisual_implementation {
int (*visual_stream)(notcurses* nc, struct ncvisual* ncv, float timescale,
ncstreamcb streamer, const struct ncvisual_options* vopts, void* curry);
char* (*visual_subtitle)(const struct ncvisual* ncv);
int rowalign; // rowstride base, can be 0 for no padding
// do a persistent resize, changing the ncv itself
int (*visual_resize)(struct ncvisual* ncv, int rows, int cols);
void (*visual_destroy)(struct ncvisual* ncv);

22
src/lib/visual.c
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@ -562,16 +562,16 @@ int ncvisual_rotate(ncvisual* ncv, double rads){
return 0;
}
// ffmpeg wants rows to be multiples of IMGALIGN (64)
#define IMGALIGN 64
static inline size_t
pad_for_image(size_t stride){
if(stride % IMGALIGN == 0){
pad_for_image(size_t stride, int cols){
if(visual_implementation.rowalign == 0){
return 4 * cols;
}else if(stride % visual_implementation.rowalign == 0){
return stride;
}
return (stride + IMGALIGN) / IMGALIGN * IMGALIGN;
return (stride + visual_implementation.rowalign) /
visual_implementation.rowalign * visual_implementation.rowalign;
}
#undef IMGALIGN
ncvisual* ncvisual_from_rgba(const void* rgba, int rows, int rowstride, int cols){
if(rowstride % 4){
@ -581,7 +581,7 @@ ncvisual* ncvisual_from_rgba(const void* rgba, int rows, int rowstride, int cols
ncvisual* ncv = ncvisual_create();
if(ncv){
// ffmpeg needs inputs with rows aligned on 192-byte boundaries
ncv->rowstride = pad_for_image(rowstride);
ncv->rowstride = pad_for_image(rowstride, cols);
ncv->pixx = cols;
ncv->pixy = rows;
uint32_t* data = malloc(ncv->rowstride * ncv->pixy);
@ -603,7 +603,7 @@ ncvisual* ncvisual_from_rgb_packed(const void* rgba, int rows, int rowstride,
int cols, int alpha){
ncvisual* ncv = ncvisual_create();
if(ncv){
ncv->rowstride = pad_for_image(cols * 4);
ncv->rowstride = pad_for_image(cols * 4, cols);
ncv->pixx = cols;
ncv->pixy = rows;
uint32_t* data = malloc(ncv->rowstride * ncv->pixy);
@ -640,7 +640,7 @@ ncvisual* ncvisual_from_rgb_loose(const void* rgba, int rows, int rowstride,
}
ncvisual* ncv = ncvisual_create();
if(ncv){
ncv->rowstride = pad_for_image(cols * 4);
ncv->rowstride = pad_for_image(cols * 4, cols);
ncv->pixx = cols;
ncv->pixy = rows;
uint32_t* data = malloc(ncv->rowstride * ncv->pixy);
@ -667,7 +667,7 @@ ncvisual* ncvisual_from_bgra(const void* bgra, int rows, int rowstride, int cols
}
ncvisual* ncv = ncvisual_create();
if(ncv){
ncv->rowstride = pad_for_image(rowstride);
ncv->rowstride = pad_for_image(rowstride, cols);
ncv->pixx = cols;
ncv->pixy = rows;
uint32_t* data = malloc(ncv->rowstride * ncv->pixy);
@ -704,7 +704,7 @@ int ncvisual_resize(ncvisual* n, int rows, int cols){
}
int ncvisual_resize_noninterpolative(ncvisual* n, int rows, int cols){
size_t dstride = pad_for_image(cols * 4);
size_t dstride = pad_for_image(cols * 4, cols);
uint32_t* r = resize_bitmap(n->data, n->pixy, n->pixx, n->rowstride,
rows, cols, dstride);
if(r == NULL){

1
src/media/ffmpeg.c
View File

@ -633,6 +633,7 @@ const ncvisual_implementation local_visual_implementation = {
.visual_subtitle = ffmpeg_subtitle,
.visual_resize = ffmpeg_resize,
.visual_destroy = ffmpeg_destroy,
.rowalign = 64, // ffmpeg wants multiples of IMGALIGN (64)
.canopen_images = true,
.canopen_videos = true,
};