diff options
author | Sergey Sharybin <sergey.vfx@gmail.com> | 2013-03-15 15:59:46 +0400 |
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committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2013-03-15 15:59:46 +0400 |
commit | 6dc4ea34e44ae77125918ab9eda0fcfe7d9f0b3c (patch) | |
tree | 20c04bcd39de1a63b515154789e1a8551e77f082 /source/blender/imbuf/intern/scaling.c | |
parent | 0807c976f45f81bc289aa87e1c8cedd07f8245c1 (diff) |
Multi-threaded frame calculation for movie clip proxies
This commit implements multi-threaded calculation of frames
when building proxies. Both scaling and undistortion steps
are now threaded.
Frames and proxy resolution are still handled one-by-one,
saving files after every single step. So if HDD is not so
fast, this commit could have not so much benefit.
Internal changes:
- Added IMB_scaleImBuf_threaded which scales given image
buffer in multiple threads and uses bilinear filtering.
- libmv's camera intrinsics now have SetThreads() method
which is used to specify how many OpenMP threads to use
for buffer distortion/undistortion.
And yeah, this code is using OpenMP for threading.
- Reshuffled a bit libmv-capi calls and added function
BKE_tracking_distortion_set_threads to specify number
of threads used by intrinscis.
Diffstat (limited to 'source/blender/imbuf/intern/scaling.c')
-rw-r--r-- | source/blender/imbuf/intern/scaling.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/source/blender/imbuf/intern/scaling.c b/source/blender/imbuf/intern/scaling.c index 1050d3f8715..51619e18980 100644 --- a/source/blender/imbuf/intern/scaling.c +++ b/source/blender/imbuf/intern/scaling.c @@ -34,6 +34,7 @@ #include "BLI_utildefines.h" #include "BLI_math_color.h" +#include "BLI_math_interp.h" #include "MEM_guardedalloc.h" #include "imbuf.h" @@ -1604,3 +1605,113 @@ struct ImBuf *IMB_scalefastImBuf(struct ImBuf *ibuf, unsigned int newx, unsigned return(ibuf); } +/* ******** threaded scaling ******** */ + +typedef struct ScaleTreadInitData { + ImBuf *ibuf; + + unsigned int newx; + unsigned int newy; + + unsigned char *byte_buffer; + float *float_buffer; +} ScaleTreadInitData; + +typedef struct ScaleThreadData { + ImBuf *ibuf; + + unsigned int newx; + unsigned int newy; + + int start_line; + int tot_line; + + unsigned char *byte_buffer; + float *float_buffer; +} ScaleThreadData; + +static void scale_thread_init(void *data_v, int start_line, int tot_line, void *init_data_v) +{ + ScaleThreadData *data = (ScaleThreadData *) data_v; + ScaleTreadInitData *init_data = (ScaleTreadInitData *) init_data_v; + + data->ibuf = init_data->ibuf; + + data->newx = init_data->newx; + data->newy = init_data->newy; + + data->start_line = start_line; + data->tot_line = tot_line; + + data->byte_buffer = init_data->byte_buffer; + data->float_buffer = init_data->float_buffer; +} + +static void *do_scale_thread(void *data_v) +{ + ScaleThreadData *data = (ScaleThreadData *) data_v; + ImBuf *ibuf = data->ibuf; + int i; + float factor_x = (float) ibuf->x / data->newx; + float factor_y = (float) ibuf->y / data->newy; + + for (i = 0; i < data->tot_line; i++) { + int y = data->start_line + i; + int x; + + for (x = 0; x < data->newx; x++) { + float u = (float) x * factor_x; + float v = (float) y * factor_y; + int offset = y * data->newx + x; + + if (data->byte_buffer) { + unsigned char *pixel = data->byte_buffer + 4 * offset; + BLI_bilinear_interpolation_char((unsigned char *) ibuf->rect, pixel, ibuf->x, ibuf->y, 4, u, v); + } + + if (data->float_buffer) { + float *pixel = data->float_buffer + ibuf->channels * offset; + BLI_bilinear_interpolation_fl(ibuf->rect_float, pixel, ibuf->x, ibuf->y, ibuf->channels, u, v); + } + } + } + + return NULL; +} + +void IMB_scaleImBuf_threaded(ImBuf *ibuf, unsigned int newx, unsigned int newy) +{ + ScaleTreadInitData init_data = {0}; + + /* prepare initialization data */ + init_data.ibuf = ibuf; + + init_data.newx = newx; + init_data.newy = newy; + + if (ibuf->rect) + init_data.byte_buffer = MEM_mallocN(4 * newx * newy * sizeof(char), "threaded scale byte buffer"); + + if (ibuf->rect_float) + init_data.float_buffer = MEM_mallocN(ibuf->channels * newx * newy * sizeof(float), "threaded scale float buffer"); + + /* actual scaling threads */ + IMB_processor_apply_threaded(newy, sizeof(ScaleThreadData), &init_data, + scale_thread_init, do_scale_thread); + + /* alter image buffer */ + ibuf->x = newx; + ibuf->y = newy; + + if (ibuf->rect) { + imb_freerectImBuf(ibuf); + ibuf->mall |= IB_rect; + ibuf->rect = (unsigned int *) init_data.byte_buffer; + } + + if (ibuf->rect_float) { + imb_freerectfloatImBuf(ibuf); + ibuf->mall |= IB_rectfloat; + ibuf->rect_float = init_data.float_buffer; + } +} |