/* * Copyright (c) 2007 Bobby Bingham * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * scale video filter */ #include #include #include "avfilter.h" #include "formats.h" #include "internal.h" #include "video.h" #include "libavutil/avstring.h" #include "libavutil/eval.h" #include "libavutil/internal.h" #include "libavutil/mathematics.h" #include "libavutil/opt.h" #include "libavutil/parseutils.h" #include "libavutil/pixdesc.h" #include "libavutil/imgutils.h" #include "libavutil/avassert.h" #include "libswscale/swscale.h" static const char *const var_names[] = { "in_w", "iw", "in_h", "ih", "out_w", "ow", "out_h", "oh", "a", "sar", "dar", "hsub", "vsub", "ohsub", "ovsub", NULL }; enum var_name { VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH, VAR_A, VAR_SAR, VAR_DAR, VAR_HSUB, VAR_VSUB, VAR_OHSUB, VAR_OVSUB, VARS_NB }; typedef struct ScaleContext { const AVClass *class; struct SwsContext *sws; ///< software scaler context struct SwsContext *isws[2]; ///< software scaler context for interlaced material AVDictionary *opts; /** * New dimensions. Special values are: * 0 = original width/height * -1 = keep original aspect * -N = try to keep aspect but make sure it is divisible by N */ int w, h; char *size_str; unsigned int flags; ///sws flags double param[2]; // sws params int hsub, vsub; ///< chroma subsampling int slice_y; ///< top of current output slice int input_is_pal; ///< set to 1 if the input format is paletted int output_is_pal; ///< set to 1 if the output format is paletted int interlaced; char *w_expr; ///< width expression string char *h_expr; ///< height expression string char *flags_str; char *in_color_matrix; char *out_color_matrix; int in_range; int out_range; int out_h_chr_pos; int out_v_chr_pos; int in_h_chr_pos; int in_v_chr_pos; int force_original_aspect_ratio; int nb_slices; } ScaleContext; AVFilter ff_vf_scale2ref; static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts) { ScaleContext *scale = ctx->priv; int ret; if (scale->size_str && (scale->w_expr || scale->h_expr)) { av_log(ctx, AV_LOG_ERROR, "Size and width/height expressions cannot be set at the same time.\n"); return AVERROR(EINVAL); } if (scale->w_expr && !scale->h_expr) FFSWAP(char *, scale->w_expr, scale->size_str); if (scale->size_str) { char buf[32]; if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) { av_log(ctx, AV_LOG_ERROR, "Invalid size '%s'\n", scale->size_str); return ret; } snprintf(buf, sizeof(buf)-1, "%d", scale->w); av_opt_set(scale, "w", buf, 0); snprintf(buf, sizeof(buf)-1, "%d", scale->h); av_opt_set(scale, "h", buf, 0); } if (!scale->w_expr) av_opt_set(scale, "w", "iw", 0); if (!scale->h_expr) av_opt_set(scale, "h", "ih", 0); av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n", scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced); scale->flags = 0; if (scale->flags_str) { const AVClass *class = sws_get_class(); const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0, AV_OPT_SEARCH_FAKE_OBJ); int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags); if (ret < 0) return ret; } scale->opts = *opts; *opts = NULL; return 0; } static av_cold void uninit(AVFilterContext *ctx) { ScaleContext *scale = ctx->priv; sws_freeContext(scale->sws); sws_freeContext(scale->isws[0]); sws_freeContext(scale->isws[1]); scale->sws = NULL; av_dict_free(&scale->opts); } static int query_formats(AVFilterContext *ctx) { AVFilterFormats *formats; enum AVPixelFormat pix_fmt; int ret; if (ctx->inputs[0]) { const AVPixFmtDescriptor *desc = NULL; formats = NULL; while ((desc = av_pix_fmt_desc_next(desc))) { pix_fmt = av_pix_fmt_desc_get_id(desc); if ((sws_isSupportedInput(pix_fmt) || sws_isSupportedEndiannessConversion(pix_fmt)) && (ret = ff_add_format(&formats, pix_fmt)) < 0) { return ret; } } if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->out_formats)) < 0) return ret; } if (ctx->outputs[0]) { const AVPixFmtDescriptor *desc = NULL; formats = NULL; while ((desc = av_pix_fmt_desc_next(desc))) { pix_fmt = av_pix_fmt_desc_get_id(desc); if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 || sws_isSupportedEndiannessConversion(pix_fmt)) && (ret = ff_add_format(&formats, pix_fmt)) < 0) { return ret; } } if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->in_formats)) < 0) return ret; } return 0; } static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace) { if (!s) s = "bt601"; if (s && strstr(s, "bt709")) { colorspace = AVCOL_SPC_BT709; } else if (s && strstr(s, "fcc")) { colorspace = AVCOL_SPC_FCC; } else if (s && strstr(s, "smpte240m")) { colorspace = AVCOL_SPC_SMPTE240M; } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) { colorspace = AVCOL_SPC_BT470BG; } if (colorspace < 1 || colorspace > 7) { colorspace = AVCOL_SPC_BT470BG; } return sws_getCoefficients(colorspace); } static int config_props(AVFilterLink *outlink) { AVFilterContext *ctx = outlink->src; AVFilterLink *inlink0 = outlink->src->inputs[0]; AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ? outlink->src->inputs[1] : outlink->src->inputs[0]; enum AVPixelFormat outfmt = outlink->format; ScaleContext *scale = ctx->priv; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format); int64_t w, h; double var_values[VARS_NB], res; char *expr; int ret; int factor_w, factor_h; var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w; var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h; var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN; var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN; var_values[VAR_A] = (double) inlink->w / inlink->h; var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1; var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR]; var_values[VAR_HSUB] = 1 << desc->log2_chroma_w; var_values[VAR_VSUB] = 1 << desc->log2_chroma_h; var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w; var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h; /* evaluate width and height */ av_expr_parse_and_eval(&res, (expr = scale->w_expr), var_names, var_values, NULL, NULL, NULL, NULL, NULL, 0, ctx); scale->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res; if ((ret = av_expr_parse_and_eval(&res, (expr = scale->h_expr), var_names, var_values, NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) goto fail; scale->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res; /* evaluate again the width, as it may depend on the output height */ if ((ret = av_expr_parse_and_eval(&res, (expr = scale->w_expr), var_names, var_values, NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) goto fail; scale->w = res; w = scale->w; h = scale->h; /* Check if it is requested that the result has to be divisible by a some * factor (w or h = -n with n being the factor). */ factor_w = 1; factor_h = 1; if (w < -1) { factor_w = -w; } if (h < -1) { factor_h = -h; } if (w < 0 && h < 0) scale->w = scale->h = 0; if (!(w = scale->w)) w = inlink->w; if (!(h = scale->h)) h = inlink->h; /* Make sure that the result is divisible by the factor we determined * earlier. If no factor was set, it is nothing will happen as the default * factor is 1 */ if (w < 0) w = av_rescale(h, inlink->w, inlink->h * factor_w) * factor_w; if (h < 0) h = av_rescale(w, inlink->h, inlink->w * factor_h) * factor_h; /* Note that force_original_aspect_ratio may overwrite the previous set * dimensions so that it is not divisible by the set factors anymore. */ if (scale->force_original_aspect_ratio) { int tmp_w = av_rescale(h, inlink->w, inlink->h); int tmp_h = av_rescale(w, inlink->h, inlink->w); if (scale->force_original_aspect_ratio == 1) { w = FFMIN(tmp_w, w); h = FFMIN(tmp_h, h); } else { w = FFMAX(tmp_w, w); h = FFMAX(tmp_h, h); } } if (w > INT_MAX || h > INT_MAX || (h * inlink->w) > INT_MAX || (w * inlink->h) > INT_MAX) av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n"); outlink->w = w; outlink->h = h; /* TODO: make algorithm configurable */ scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL; if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8; scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL || av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PSEUDOPAL; if (scale->sws) sws_freeContext(scale->sws); if (scale->isws[0]) sws_freeContext(scale->isws[0]); if (scale->isws[1]) sws_freeContext(scale->isws[1]); scale->isws[0] = scale->isws[1] = scale->sws = NULL; if (inlink0->w == outlink->w && inlink0->h == outlink->h && !scale->out_color_matrix && scale->in_range == scale->out_range && inlink0->format == outlink->format) ; else { struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]}; int i; for (i = 0; i < 3; i++) { struct SwsContext **s = swscs[i]; *s = sws_alloc_context(); if (!*s) return AVERROR(ENOMEM); av_opt_set_int(*s, "srcw", inlink0 ->w, 0); av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0); av_opt_set_int(*s, "src_format", inlink0->format, 0); av_opt_set_int(*s, "dstw", outlink->w, 0); av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0); av_opt_set_int(*s, "dst_format", outfmt, 0); av_opt_set_int(*s, "sws_flags", scale->flags, 0); av_opt_set_int(*s, "param0", scale->param[0], 0); av_opt_set_int(*s, "param1", scale->param[1], 0); if (scale->in_range != AVCOL_RANGE_UNSPECIFIED) av_opt_set_int(*s, "src_range", scale->in_range == AVCOL_RANGE_JPEG, 0); if (scale->out_range != AVCOL_RANGE_UNSPECIFIED) av_opt_set_int(*s, "dst_range", scale->out_range == AVCOL_RANGE_JPEG, 0); if (scale->opts) { AVDictionaryEntry *e = NULL; while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) { if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0) return ret; } } /* Override YUV420P default settings to have the correct (MPEG-2) chroma positions * MPEG-2 chroma positions are used by convention * XXX: support other 4:2:0 pixel formats */ if (inlink0->format == AV_PIX_FMT_YUV420P && scale->in_v_chr_pos == -513) { scale->in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192; } if (outlink->format == AV_PIX_FMT_YUV420P && scale->out_v_chr_pos == -513) { scale->out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192; } av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0); av_opt_set_int(*s, "src_v_chr_pos", scale->in_v_chr_pos, 0); av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0); av_opt_set_int(*s, "dst_v_chr_pos", scale->out_v_chr_pos, 0); if ((ret = sws_init_context(*s, NULL, NULL)) < 0) return ret; if (!scale->interlaced) break; } } if (inlink->sample_aspect_ratio.num){ outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio); } else outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:0x%0x\n", inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format), inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den, outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format), outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den, scale->flags); return 0; fail: av_log(NULL, AV_LOG_ERROR, "Error when evaluating the expression '%s'.\n" "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n", expr, scale->w_expr, scale->h_expr); return ret; } static int config_props_ref(AVFilterLink *outlink) { AVFilterLink *inlink = outlink->src->inputs[1]; outlink->w = inlink->w; outlink->h = inlink->h; outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; outlink->time_base = inlink->time_base; return 0; } static int request_frame(AVFilterLink *outlink) { return ff_request_frame(outlink->src->inputs[0]); } static int request_frame_ref(AVFilterLink *outlink) { return ff_request_frame(outlink->src->inputs[1]); } static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field) { ScaleContext *scale = link->dst->priv; const uint8_t *in[4]; uint8_t *out[4]; int in_stride[4],out_stride[4]; int i; for(i=0; i<4; i++){ int vsub= ((i+1)&2) ? scale->vsub : 0; in_stride[i] = cur_pic->linesize[i] * mul; out_stride[i] = out_buf->linesize[i] * mul; in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i]; out[i] = out_buf->data[i] + field * out_buf->linesize[i]; } if(scale->input_is_pal) in[1] = cur_pic->data[1]; if(scale->output_is_pal) out[1] = out_buf->data[1]; return sws_scale(sws, in, in_stride, y/mul, h, out,out_stride); } static int filter_frame(AVFilterLink *link, AVFrame *in) { ScaleContext *scale = link->dst->priv; AVFilterLink *outlink = link->dst->outputs[0]; AVFrame *out; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); char buf[32]; int in_range; if (av_frame_get_colorspace(in) == AVCOL_SPC_YCGCO) av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n"); if( in->width != link->w || in->height != link->h || in->format != link->format) { int ret; snprintf(buf, sizeof(buf)-1, "%d", outlink->w); av_opt_set(scale, "w", buf, 0); snprintf(buf, sizeof(buf)-1, "%d", outlink->h); av_opt_set(scale, "h", buf, 0); link->dst->inputs[0]->format = in->format; link->dst->inputs[0]->w = in->width; link->dst->inputs[0]->h = in->height; if ((ret = config_props(outlink)) < 0) return ret; } if (!scale->sws) return ff_filter_frame(outlink, in); scale->hsub = desc->log2_chroma_w; scale->vsub = desc->log2_chroma_h; out = ff_get_video_buffer(outlink, outlink->w, outlink->h); if (!out) { av_frame_free(&in); return AVERROR(ENOMEM); } av_frame_copy_props(out, in); out->width = outlink->w; out->height = outlink->h; if(scale->output_is_pal) avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format); in_range = av_frame_get_color_range(in); if ( scale->in_color_matrix || scale->out_color_matrix || scale-> in_range != AVCOL_RANGE_UNSPECIFIED || in_range != AVCOL_RANGE_UNSPECIFIED || scale->out_range != AVCOL_RANGE_UNSPECIFIED) { int in_full, out_full, brightness, contrast, saturation; const int *inv_table, *table; sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full, (int **)&table, &out_full, &brightness, &contrast, &saturation); if (scale->in_color_matrix) inv_table = parse_yuv_type(scale->in_color_matrix, av_frame_get_colorspace(in)); if (scale->out_color_matrix) table = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED); else if (scale->in_color_matrix) table = inv_table; if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED) in_full = (scale-> in_range == AVCOL_RANGE_JPEG); else if (in_range != AVCOL_RANGE_UNSPECIFIED) in_full = (in_range == AVCOL_RANGE_JPEG); if (scale->out_range != AVCOL_RANGE_UNSPECIFIED) out_full = (scale->out_range == AVCOL_RANGE_JPEG); sws_setColorspaceDetails(scale->sws, inv_table, in_full, table, out_full, brightness, contrast, saturation); if (scale->isws[0]) sws_setColorspaceDetails(scale->isws[0], inv_table, in_full, table, out_full, brightness, contrast, saturation); if (scale->isws[1]) sws_setColorspaceDetails(scale->isws[1], inv_table, in_full, table, out_full, brightness, contrast, saturation); } av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den, (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w, (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h, INT_MAX); if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){ scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0); scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1); }else if (scale->nb_slices) { int i, slice_h, slice_start, slice_end = 0; const int nb_slices = FFMIN(scale->nb_slices, link->h); for (i = 0; i < nb_slices; i++) { slice_start = slice_end; slice_end = (link->h * (i+1)) / nb_slices; slice_h = slice_end - slice_start; scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0); } }else{ scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0); } av_frame_free(&in); return ff_filter_frame(outlink, out); } static int filter_frame_ref(AVFilterLink *link, AVFrame *in) { AVFilterLink *outlink = link->dst->outputs[1]; return ff_filter_frame(outlink, in); } static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags) { ScaleContext *scale = ctx->priv; int ret; if ( !strcmp(cmd, "width") || !strcmp(cmd, "w") || !strcmp(cmd, "height") || !strcmp(cmd, "h")) { int old_w = scale->w; int old_h = scale->h; AVFilterLink *outlink = ctx->outputs[0]; av_opt_set(scale, cmd, args, 0); if ((ret = config_props(outlink)) < 0) { scale->w = old_w; scale->h = old_h; } } else ret = AVERROR(ENOSYS); return ret; } static const AVClass *child_class_next(const AVClass *prev) { return prev ? NULL : sws_get_class(); } #define OFFSET(x) offsetof(ScaleContext, x) #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM static const AVOption scale_options[] = { { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS }, { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS }, { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS }, { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS }, { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS }, { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS }, { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" }, { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" }, { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" }, { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" }, { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" }, { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, { "in_v_chr_pos", "input vertical chroma position in luma grid/256" , OFFSET(in_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS }, { "in_h_chr_pos", "input horizontal chroma position in luma grid/256", OFFSET(in_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS }, { "out_v_chr_pos", "output vertical chroma position in luma grid/256" , OFFSET(out_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS }, { "out_h_chr_pos", "output horizontal chroma position in luma grid/256", OFFSET(out_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS }, { "force_original_aspect_ratio", "decrease or increase w/h if necessary to keep the original AR", OFFSET(force_original_aspect_ratio), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 2, FLAGS, "force_oar" }, { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" }, { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" }, { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" }, { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS }, { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS }, { "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, { NULL } }; static const AVClass scale_class = { .class_name = "scale", .item_name = av_default_item_name, .option = scale_options, .version = LIBAVUTIL_VERSION_INT, .category = AV_CLASS_CATEGORY_FILTER, .child_class_next = child_class_next, }; static const AVFilterPad avfilter_vf_scale_inputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .filter_frame = filter_frame, }, { NULL } }; static const AVFilterPad avfilter_vf_scale_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_props, }, { NULL } }; AVFilter ff_vf_scale = { .name = "scale", .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."), .init_dict = init_dict, .uninit = uninit, .query_formats = query_formats, .priv_size = sizeof(ScaleContext), .priv_class = &scale_class, .inputs = avfilter_vf_scale_inputs, .outputs = avfilter_vf_scale_outputs, .process_command = process_command, }; static const AVClass scale2ref_class = { .class_name = "scale2ref", .item_name = av_default_item_name, .option = scale_options, .version = LIBAVUTIL_VERSION_INT, .category = AV_CLASS_CATEGORY_FILTER, .child_class_next = child_class_next, }; static const AVFilterPad avfilter_vf_scale2ref_inputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .filter_frame = filter_frame, }, { .name = "ref", .type = AVMEDIA_TYPE_VIDEO, .filter_frame = filter_frame_ref, }, { NULL } }; static const AVFilterPad avfilter_vf_scale2ref_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_props, .request_frame= request_frame, }, { .name = "ref", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_props_ref, .request_frame= request_frame_ref, }, { NULL } }; AVFilter ff_vf_scale2ref = { .name = "scale2ref", .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."), .init_dict = init_dict, .uninit = uninit, .query_formats = query_formats, .priv_size = sizeof(ScaleContext), .priv_class = &scale2ref_class, .inputs = avfilter_vf_scale2ref_inputs, .outputs = avfilter_vf_scale2ref_outputs, .process_command = process_command, };