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https://github.com/mpv-player/mpv
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d8659c9aa0
This splits the monolithic mp_image_swscale() function into a bunch of functions and a context struct. This means it's possible to set arbitrary parameters (e.g. even obscure ones without getting in the way), and you don't have to create the context on every call. This code is preparation for removing duplicated libswscale API usage from other parts of the code.
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
#ifndef MPLAYER_SWS_UTILS_H
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#define MPLAYER_SWS_UTILS_H
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#include <stdbool.h>
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#include <libswscale/swscale.h>
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#include "mp_image.h"
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struct mp_image;
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struct mp_csp_details;
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// libswscale currently requires 16 bytes alignment for row pointers and
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// strides. Otherwise, it will print warnings and use slow codepaths.
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// Guaranteed to be a power of 2 and > 1.
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#define SWS_MIN_BYTE_ALIGN 16
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void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam,
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SwsFilter **dstFilterParam);
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struct SwsContext *sws_getContextFromCmdLine(int srcW, int srcH, int srcFormat,
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int dstW, int dstH,
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int dstFormat);
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bool mp_sws_supported_format(int imgfmt);
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void mp_image_swscale(struct mp_image *dst, struct mp_image *src,
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int my_sws_flags);
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void mp_image_sw_blur_scale(struct mp_image *dst, struct mp_image *src,
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float gblur);
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struct mp_sws_context {
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// User configuration. These can be changed freely, at any time.
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// mp_sws_scale() will handle the changes transparently.
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int flags;
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int brightness, contrast, saturation;
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bool force_reload;
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// These are also implicitly set by mp_sws_scale(), and thus optional.
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// Setting them before that call makes sense when using mp_sws_reinit().
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struct mp_image_params src, dst;
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// Changing these requires setting force_reload=true.
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// By default, they are NULL.
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// Freeing the mp_sws_context will deallocate these if set.
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struct SwsFilter *src_filter, *dst_filter;
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// Cached context (if any)
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struct SwsContext *sws;
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// Contains parameters for which sws is valid
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struct mp_sws_context *cached;
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};
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struct mp_sws_context *mp_sws_alloc(void *talloc_parent);
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int mp_sws_reinit(struct mp_sws_context *ctx);
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void mp_sws_set_from_cmdline(struct mp_sws_context *ctx);
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int mp_sws_scale(struct mp_sws_context *ctx, struct mp_image *dst,
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struct mp_image *src);
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#endif /* MP_SWS_UTILS_H */
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// vim: ts=4 sw=4 et tw=80
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