On Thu, Jan 29, 2015 at 8:14 AM, Maksym Veremeyenko <ve...@m1stereo.tv>
wrote:
> Hi,
>
> provided patch is a second attempt to introduce subj.
>
> thees pathset makes two things:
>
> 1. disable creating alpha channel for frame if it does not exist
>
> 2. implement 8 variants of blending/compositing function:
>
> 0| dest_a == NULL | src_a == NULL | weight == 256 | blit
> 1| dest_a == NULL | src_a == NULL | weight != 256 | blend: with given alpha
> 2| dest_a == NULL | src_a != NULL | weight == 256 | blend: only src alpha
> 3| dest_a == NULL | src_a != NULL | weight != 256 | blend: premultiply src
> alpha
> 4| dest_a != NULL | src_a == NULL | weight == 256 | blit: blit and set dst
> alpha to FF
> 5| dest_a != NULL | src_a == NULL | weight != 256 | blend: with given alpha
> 6| dest_a != NULL | src_a != NULL | weight == 256 | blend: full blend
> without src alpha premutiply
> 7| dest_a != NULL | src_a != NULL | weight != 256 | blend: full (origin
> version)
>
> i found a serious boost of performance after applying that patchset.
>
> please review.
>
>
With the last patch applied, a couple of things in demo/ are segfaulting in
composite_line_yuv_sse2_simple.c:blend_case7(). See demo/mlt_news and
mlt_title_over_gfx.
Also, I want to change the name of mlt_frame_get_alpha_mask_nc() to simply
mlt_frame_get_alpha().
Thanks
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