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https://github.com/mpv-player/mpv
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ca67928d7a
mp_sws_set_from_cmdline() has the only purpose to respect the --sws- command line options. Instead of forcing callers to get the option struct containing these, let callers pass mpv_global, and get it from the option core code directly. This avoids minor annoyances later on.
331 lines
11 KiB
C
331 lines
11 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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//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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};
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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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{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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talloc_free(opts);
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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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}
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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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};
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talloc_set_destructor(ctx, free_mp_sws);
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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 = 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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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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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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