mirror of
https://github.com/mpv-player/mpv
synced 2024-11-18 21:16:10 +01:00
51e141f7ba
Awful shit. I probably wouldn't accept this code from someone else, just so you know. The idea is that a sws_utils user can automatically use zimg without large code changes. Basically, laziness. Since zimg support is still very new, and I don't want that anything breaks just because zimg was enabled at build time, an option needs to be set to enable it. (I have especially especially obscure stuff in mind, which is all what libswscale is used in mpv.) This _still_ doesn't cause zimg to be used anywhere, because the sws_utils user has to opt-in by setting allow_zimg. This is because some users depend on certain libswscale features.
374 lines
12 KiB
C
374 lines
12 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <libswscale/swscale.h>
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#include <libavcodec/avcodec.h>
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#include <libavutil/bswap.h>
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#include <libavutil/opt.h>
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#include "config.h"
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#include "sws_utils.h"
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#include "common/common.h"
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#include "options/m_config.h"
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#include "options/m_option.h"
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#include "video/mp_image.h"
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#include "video/img_format.h"
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#include "fmt-conversion.h"
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#include "csputils.h"
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#include "common/msg.h"
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#include "osdep/endian.h"
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#if HAVE_ZIMG
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#include "zimg.h"
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#endif
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//global sws_flags from the command line
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struct sws_opts {
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int scaler;
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float lum_gblur;
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float chr_gblur;
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int chr_vshift;
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int chr_hshift;
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float chr_sharpen;
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float lum_sharpen;
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int zimg;
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};
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#define OPT_BASE_STRUCT struct sws_opts
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const struct m_sub_options sws_conf = {
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.opts = (const m_option_t[]) {
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OPT_CHOICE("scaler", scaler, 0,
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({"fast-bilinear", SWS_FAST_BILINEAR},
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{"bilinear", SWS_BILINEAR},
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{"bicubic", SWS_BICUBIC},
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{"x", SWS_X},
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{"point", SWS_POINT},
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{"area", SWS_AREA},
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{"bicublin", SWS_BICUBLIN},
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{"gauss", SWS_GAUSS},
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{"sinc", SWS_SINC},
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{"lanczos", SWS_LANCZOS},
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{"spline", SWS_SPLINE})),
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OPT_FLOATRANGE("lgb", lum_gblur, 0, 0, 100.0),
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OPT_FLOATRANGE("cgb", chr_gblur, 0, 0, 100.0),
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OPT_INT("cvs", chr_vshift, 0),
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OPT_INT("chs", chr_hshift, 0),
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OPT_FLOATRANGE("ls", lum_sharpen, 0, -100.0, 100.0),
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OPT_FLOATRANGE("cs", chr_sharpen, 0, -100.0, 100.0),
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OPT_FLAG("allow-zimg", zimg, 0),
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{0}
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},
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.size = sizeof(struct sws_opts),
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.defaults = &(const struct sws_opts){
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.scaler = SWS_BICUBIC,
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},
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};
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// Highest quality, but also slowest.
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const int mp_sws_hq_flags = SWS_LANCZOS | SWS_FULL_CHR_H_INT |
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SWS_FULL_CHR_H_INP | SWS_ACCURATE_RND |
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SWS_BITEXACT;
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// Fast, lossy.
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const int mp_sws_fast_flags = SWS_BILINEAR;
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// Set ctx parameters to global command line flags.
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void mp_sws_set_from_cmdline(struct mp_sws_context *ctx, struct mpv_global *g)
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{
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struct sws_opts *opts = mp_get_config_group(NULL, g, &sws_conf);
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sws_freeFilter(ctx->src_filter);
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ctx->src_filter = sws_getDefaultFilter(opts->lum_gblur, opts->chr_gblur,
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opts->lum_sharpen, opts->chr_sharpen,
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opts->chr_hshift, opts->chr_vshift, 0);
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ctx->force_reload = true;
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ctx->flags = SWS_PRINT_INFO;
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ctx->flags |= opts->scaler;
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ctx->opts_allow_zimg = opts->zimg;
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talloc_free(opts);
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#if HAVE_ZIMG
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mp_zimg_set_from_cmdline(ctx->zimg, g);
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#endif
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}
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bool mp_sws_supported_format(int imgfmt)
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{
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enum AVPixelFormat av_format = imgfmt2pixfmt(imgfmt);
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return av_format != AV_PIX_FMT_NONE && sws_isSupportedInput(av_format)
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&& sws_isSupportedOutput(av_format);
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}
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static int mp_csp_to_sws_colorspace(enum mp_csp csp)
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{
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// The SWS_CS_* macros are just convenience redefinitions of the
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// AVCOL_SPC_* macros, inside swscale.h.
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return mp_csp_to_avcol_spc(csp);
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}
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static bool cache_valid(struct mp_sws_context *ctx)
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{
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struct mp_sws_context *old = ctx->cached;
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if (ctx->force_reload)
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return false;
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return mp_image_params_equal(&ctx->src, &old->src) &&
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mp_image_params_equal(&ctx->dst, &old->dst) &&
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ctx->flags == old->flags &&
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ctx->brightness == old->brightness &&
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ctx->contrast == old->contrast &&
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ctx->saturation == old->saturation &&
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ctx->allow_zimg == old->allow_zimg;
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}
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static void free_mp_sws(void *p)
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{
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struct mp_sws_context *ctx = p;
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sws_freeContext(ctx->sws);
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sws_freeFilter(ctx->src_filter);
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sws_freeFilter(ctx->dst_filter);
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}
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// You're supposed to set your scaling parameters on the returned context.
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// Free the context with talloc_free().
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struct mp_sws_context *mp_sws_alloc(void *talloc_ctx)
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{
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struct mp_sws_context *ctx = talloc_ptrtype(talloc_ctx, ctx);
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*ctx = (struct mp_sws_context) {
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.log = mp_null_log,
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.flags = SWS_BILINEAR,
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.contrast = 1 << 16, // 1.0 in 16.16 fixed point
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.saturation = 1 << 16,
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.force_reload = true,
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.params = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT},
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.cached = talloc_zero(ctx, struct mp_sws_context),
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.opts_allow_zimg = true,
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};
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talloc_set_destructor(ctx, free_mp_sws);
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#if HAVE_ZIMG
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ctx->zimg = mp_zimg_alloc();
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talloc_steal(ctx, ctx->zimg);
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#endif
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return ctx;
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}
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// Reinitialize (if needed) - return error code.
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// Optional, but possibly useful to avoid having to handle mp_sws_scale errors.
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int mp_sws_reinit(struct mp_sws_context *ctx)
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{
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struct mp_image_params *src = &ctx->src;
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struct mp_image_params *dst = &ctx->dst;
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// Neutralize unsupported or ignored parameters.
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src->p_w = dst->p_w = 0;
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src->p_h = dst->p_h = 0;
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if (cache_valid(ctx))
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return 0;
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sws_freeContext(ctx->sws);
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ctx->sws = NULL;
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ctx->zimg_ok = false;
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#if HAVE_ZIMG
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if (ctx->allow_zimg && ctx->opts_allow_zimg) {
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ctx->zimg->log = ctx->log;
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ctx->zimg->src = *src;
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ctx->zimg->dst = *dst;
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if (mp_zimg_config(ctx->zimg)) {
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ctx->zimg_ok = true;
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MP_VERBOSE(ctx, "using zimg\n");
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goto success;
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}
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MP_VERBOSE(ctx, "falling back to swscale\n");
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}
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#endif
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ctx->sws = sws_alloc_context();
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if (!ctx->sws)
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return -1;
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mp_image_params_guess_csp(src); // sanitize colorspace/colorlevels
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mp_image_params_guess_csp(dst);
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struct mp_imgfmt_desc src_fmt = mp_imgfmt_get_desc(src->imgfmt);
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struct mp_imgfmt_desc dst_fmt = mp_imgfmt_get_desc(dst->imgfmt);
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if (!src_fmt.id || !dst_fmt.id)
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return -1;
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enum AVPixelFormat s_fmt = imgfmt2pixfmt(src->imgfmt);
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if (s_fmt == AV_PIX_FMT_NONE || sws_isSupportedInput(s_fmt) < 1) {
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MP_ERR(ctx, "Input image format %s not supported by libswscale.\n",
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mp_imgfmt_to_name(src->imgfmt));
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return -1;
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}
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enum AVPixelFormat d_fmt = imgfmt2pixfmt(dst->imgfmt);
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if (d_fmt == AV_PIX_FMT_NONE || sws_isSupportedOutput(d_fmt) < 1) {
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MP_ERR(ctx, "Output image format %s not supported by libswscale.\n",
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mp_imgfmt_to_name(dst->imgfmt));
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return -1;
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}
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int s_csp = mp_csp_to_sws_colorspace(src->color.space);
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int s_range = src->color.levels == MP_CSP_LEVELS_PC;
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int d_csp = mp_csp_to_sws_colorspace(dst->color.space);
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int d_range = dst->color.levels == MP_CSP_LEVELS_PC;
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// Work around libswscale bug #1852 (fixed in ffmpeg commit 8edf9b1fa):
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// setting range flags for RGB gives random bogus results.
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// Newer libswscale always ignores range flags for RGB.
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s_range = s_range && (src_fmt.flags & MP_IMGFLAG_YUV);
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d_range = d_range && (dst_fmt.flags & MP_IMGFLAG_YUV);
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av_opt_set_int(ctx->sws, "sws_flags", ctx->flags, 0);
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av_opt_set_int(ctx->sws, "srcw", src->w, 0);
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av_opt_set_int(ctx->sws, "srch", src->h, 0);
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av_opt_set_int(ctx->sws, "src_format", s_fmt, 0);
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av_opt_set_int(ctx->sws, "dstw", dst->w, 0);
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av_opt_set_int(ctx->sws, "dsth", dst->h, 0);
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av_opt_set_int(ctx->sws, "dst_format", d_fmt, 0);
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av_opt_set_double(ctx->sws, "param0", ctx->params[0], 0);
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av_opt_set_double(ctx->sws, "param1", ctx->params[1], 0);
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#if LIBAVCODEC_VERSION_MICRO >= 100
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int cr_src = mp_chroma_location_to_av(src->chroma_location);
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int cr_dst = mp_chroma_location_to_av(dst->chroma_location);
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int cr_xpos, cr_ypos;
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if (avcodec_enum_to_chroma_pos(&cr_xpos, &cr_ypos, cr_src) >= 0) {
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av_opt_set_int(ctx->sws, "src_h_chr_pos", cr_xpos, 0);
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av_opt_set_int(ctx->sws, "src_v_chr_pos", cr_ypos, 0);
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}
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if (avcodec_enum_to_chroma_pos(&cr_xpos, &cr_ypos, cr_dst) >= 0) {
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av_opt_set_int(ctx->sws, "dst_h_chr_pos", cr_xpos, 0);
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av_opt_set_int(ctx->sws, "dst_v_chr_pos", cr_ypos, 0);
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}
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#endif
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// This can fail even with normal operation, e.g. if a conversion path
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// simply does not support these settings.
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int r =
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sws_setColorspaceDetails(ctx->sws, sws_getCoefficients(s_csp), s_range,
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sws_getCoefficients(d_csp), d_range,
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ctx->brightness, ctx->contrast, ctx->saturation);
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ctx->supports_csp = r >= 0;
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if (sws_init_context(ctx->sws, ctx->src_filter, ctx->dst_filter) < 0)
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return -1;
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success:
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ctx->force_reload = false;
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*ctx->cached = *ctx;
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return 1;
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}
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// Scale from src to dst - if src/dst have different parameters from previous
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// calls, the context is reinitialized. Return error code. (It can fail if
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// reinitialization was necessary, and swscale returned an error.)
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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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{
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ctx->src = src->params;
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ctx->dst = dst->params;
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int r = mp_sws_reinit(ctx);
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if (r < 0) {
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MP_ERR(ctx, "libswscale initialization failed.\n");
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return r;
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}
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#if HAVE_ZIMG
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if (ctx->zimg_ok)
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return mp_zimg_convert(ctx->zimg, dst, src) ? 0 : -1;
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#endif
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sws_scale(ctx->sws, (const uint8_t *const *) src->planes, src->stride,
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0, src->h, dst->planes, dst->stride);
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return 0;
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}
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int mp_image_swscale(struct mp_image *dst, struct mp_image *src,
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int my_sws_flags)
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{
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struct mp_sws_context *ctx = mp_sws_alloc(NULL);
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ctx->flags = my_sws_flags;
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int res = mp_sws_scale(ctx, dst, src);
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talloc_free(ctx);
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return res;
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}
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int mp_image_sw_blur_scale(struct mp_image *dst, struct mp_image *src,
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float gblur)
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{
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struct mp_sws_context *ctx = mp_sws_alloc(NULL);
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ctx->flags = mp_sws_hq_flags;
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ctx->src_filter = sws_getDefaultFilter(gblur, gblur, 0, 0, 0, 0, 0);
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ctx->force_reload = true;
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int res = mp_sws_scale(ctx, dst, src);
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talloc_free(ctx);
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return res;
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}
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static const int endian_swaps[][2] = {
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#if BYTE_ORDER == LITTLE_ENDIAN
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#if defined(AV_PIX_FMT_YA16) && defined(AV_PIX_FMT_RGBA64)
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{AV_PIX_FMT_YA16BE, AV_PIX_FMT_YA16LE},
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{AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_RGBA64LE},
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{AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE},
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{AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGB48LE},
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#endif
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#endif
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{AV_PIX_FMT_NONE, AV_PIX_FMT_NONE}
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};
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// Swap _some_ non-native endian formats to native. We do this specifically
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// for pixel formats used by PNG, to avoid going through libswscale, which
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// might reduce the effective bit depth in some cases.
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struct mp_image *mp_img_swap_to_native(struct mp_image *img)
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{
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int to = AV_PIX_FMT_NONE;
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for (int n = 0; endian_swaps[n][0] != AV_PIX_FMT_NONE; n++) {
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if (endian_swaps[n][0] == img->fmt.avformat)
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to = endian_swaps[n][1];
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}
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if (to == AV_PIX_FMT_NONE || !mp_image_make_writeable(img))
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return img;
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int elems = img->fmt.bytes[0] / 2 * img->w;
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for (int y = 0; y < img->h; y++) {
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uint16_t *p = (uint16_t *)(img->planes[0] + y * img->stride[0]);
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for (int i = 0; i < elems; i++)
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p[i] = av_be2ne16(p[i]);
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}
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mp_image_setfmt(img, pixfmt2imgfmt(to));
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return img;
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}
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// vim: ts=4 sw=4 et tw=80
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