From 3c940173c0ada2d76c83da80aae816f720f3cb3a Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 7 May 2010 11:47:13 +0000 Subject: [PATCH] Add pad filter. Originally committed as revision 23046 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/vf_pad.c | 326 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 328 insertions(+) create mode 100644 libavfilter/vf_pad.c diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 82accb4e4a..2ddf217631 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -19,6 +19,7 @@ OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o OBJS-$(CONFIG_FORMAT_FILTER) += vf_format.o OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o OBJS-$(CONFIG_NULL_FILTER) += vf_null.o +OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o OBJS-$(CONFIG_PIXELASPECT_FILTER) += vf_aspect.o OBJS-$(CONFIG_SCALE_FILTER) += vf_scale.o OBJS-$(CONFIG_SLICIFY_FILTER) += vf_slicify.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 8f89adcb75..e85485c41d 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -39,6 +39,7 @@ void avfilter_register_all(void) REGISTER_FILTER (FORMAT, format, vf); REGISTER_FILTER (NOFORMAT, noformat, vf); REGISTER_FILTER (NULL, null, vf); + REGISTER_FILTER (PAD, pad, vf); REGISTER_FILTER (PIXELASPECT, pixelaspect, vf); REGISTER_FILTER (SCALE, scale, vf); REGISTER_FILTER (SLICIFY, slicify, vf); diff --git a/libavfilter/vf_pad.c b/libavfilter/vf_pad.c new file mode 100644 index 0000000000..fbe6606e36 --- /dev/null +++ b/libavfilter/vf_pad.c @@ -0,0 +1,326 @@ +/* + * copyright (c) 2008 vmrsss + * copyright (c) 2009 Stefano Sabatini + * + * 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 libavfilter/vf_pad.c + * video padding filter + */ + +#include "avfilter.h" +#include "parseutils.h" +#include "libavutil/pixdesc.h" +#include "libavcodec/colorspace.h" + +typedef struct { + int w, h; ///< output dimensions, a value of 0 will result in the input size + int x, y; ///< offsets of the input area with respect to the padded area + int in_w, in_h; ///< width and height for the padded input video, which has to be aligned to the chroma values in order to avoid chroma issues + + uint8_t color[4]; ///< color expressed either in YUVA or RGBA colorspace for the padding area + uint8_t *line[4]; + int line_step[4]; + int hsub, vsub; ///< chroma subsampling values +} PadContext; + +static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) +{ + PadContext *pad = ctx->priv; + char color_string[128] = "black"; + + if (args) + sscanf(args, "%d:%d:%d:%d:%s", &pad->w, &pad->h, &pad->x, &pad->y, color_string); + + if (av_parse_color(pad->color, color_string, ctx) < 0) + return -1; + + /* sanity check params */ + if (pad->w < 0 || pad->h < 0) { + av_log(ctx, AV_LOG_ERROR, "Negative size values are not acceptable.\n"); + return -1; + } + + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + PadContext *pad = ctx->priv; + int i; + + for (i = 0; i < 4; i++) { + av_freep(&pad->line[i]); + pad->line_step[i] = 0; + } +} + +static int query_formats(AVFilterContext *ctx) +{ + static const enum PixelFormat pix_fmts[] = { + PIX_FMT_ARGB, PIX_FMT_RGBA, + PIX_FMT_ABGR, PIX_FMT_BGRA, + PIX_FMT_RGB24, PIX_FMT_BGR24, + + PIX_FMT_YUV444P, PIX_FMT_YUV422P, + PIX_FMT_YUV420P, PIX_FMT_YUV411P, + PIX_FMT_YUV410P, PIX_FMT_YUV440P, + PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, + PIX_FMT_YUVJ420P, PIX_FMT_YUVJ440P, + PIX_FMT_YUVA420P, + + PIX_FMT_NONE + }; + + avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts)); + return 0; +} + +enum { RED = 0, GREEN, BLUE, ALPHA }; + +static int config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + PadContext *pad = ctx->priv; + const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format]; + uint8_t rgba_color[4]; + uint8_t rgba_map[4]; + int i, is_packed_rgb = 1; + + switch (inlink->format) { + case PIX_FMT_ARGB: + rgba_map[ALPHA] = 0; rgba_map[RED] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE] = 3; + break; + case PIX_FMT_ABGR: + rgba_map[ALPHA] = 0; rgba_map[BLUE] = 1; rgba_map[GREEN] = 2; rgba_map[RED] = 3; + break; + case PIX_FMT_RGBA: + case PIX_FMT_RGB24: + rgba_map[RED] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE] = 2; rgba_map[ALPHA] = 3; + break; + case PIX_FMT_BGRA: + case PIX_FMT_BGR24: + rgba_map[BLUE] = 0; rgba_map[GREEN] = 1; rgba_map[RED] = 2; rgba_map[ALPHA] = 3; + break; + default: + is_packed_rgb = 0; + } + + pad->hsub = pix_desc->log2_chroma_w; + pad->vsub = pix_desc->log2_chroma_h; + + if (!pad->w) + pad->w = inlink->w; + if (!pad->h) + pad->h = inlink->h; + + pad->w &= ~((1 << pad->hsub) - 1); + pad->h &= ~((1 << pad->vsub) - 1); + pad->x &= ~((1 << pad->hsub) - 1); + pad->y &= ~((1 << pad->vsub) - 1); + + pad->in_w = inlink->w & ~((1 << pad->hsub) - 1); + pad->in_h = inlink->h & ~((1 << pad->vsub) - 1); + + memcpy(rgba_color, pad->color, sizeof(rgba_color)); + if (is_packed_rgb) { + pad->line_step[0] = (av_get_bits_per_pixel(&av_pix_fmt_descriptors[inlink->format]))>>3; + for (i = 0; i < 4; i++) + pad->color[rgba_map[i]] = rgba_color[i]; + + pad->line[0] = av_malloc(pad->w * pad->line_step[0]); + for (i = 0; i < pad->w; i++) + memcpy(pad->line[0] + i * pad->line_step[0], pad->color, pad->line_step[0]); + } else { + int plane; + + pad->color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]); + pad->color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0); + pad->color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0); + pad->color[3] = rgba_color[3]; + + for (plane = 0; plane < 4; plane++) { + int line_size; + int hsub = (plane == 1 || plane == 2) ? pad->hsub : 0; + + pad->line_step[plane] = 1; + line_size = (pad->w >> hsub) * pad->line_step[plane]; + pad->line[plane] = av_malloc(line_size); + memset(pad->line[plane], pad->color[plane], line_size); + } + } + + av_log(ctx, AV_LOG_INFO, "w:%d h:%d x:%d y:%d color:0x%02X%02X%02X%02X[%s]\n", + pad->w, pad->h, pad->x, pad->y, + pad->color[0], pad->color[1], pad->color[2], pad->color[3], + is_packed_rgb ? "rgba" : "yuva"); + + if (pad->x < 0 || pad->y < 0 || + pad->w <= 0 || pad->h <= 0 || + (unsigned)pad->x + (unsigned)inlink->w > pad->w || + (unsigned)pad->y + (unsigned)inlink->h > pad->h) { + av_log(ctx, AV_LOG_ERROR, + "Input area %d:%d:%d:%d not within the padded area 0:0:%d:%d or zero-sized\n", + pad->x, pad->y, pad->x + inlink->w, pad->y + inlink->h, pad->w, pad->h); + return -1; + } + + return 0; +} + +static int config_output(AVFilterLink *outlink) +{ + PadContext *pad = outlink->src->priv; + + outlink->w = pad->w; + outlink->h = pad->h; + return 0; +} + +static AVFilterPicRef *get_video_buffer(AVFilterLink *inlink, int perms, int w, int h) +{ + PadContext *pad = inlink->dst->priv; + + AVFilterPicRef *picref = avfilter_get_video_buffer(inlink->dst->outputs[0], perms, + w + (pad->w - pad->in_w), + h + (pad->h - pad->in_h)); + + for (int plane = 0; plane < 4 && picref->data[plane]; plane++) { + int hsub = (plane == 1 || plane == 2) ? pad->hsub : 0; + int vsub = (plane == 1 || plane == 2) ? pad->vsub : 0; + + picref->data[plane] += (pad->x >> hsub) * pad->line_step[plane] + + (pad->y >> vsub) * picref->linesize[plane]; + } + + return picref; +} + +static void start_frame(AVFilterLink *inlink, AVFilterPicRef *inpicref) +{ + PadContext *pad = inlink->dst->priv; + AVFilterPicRef *outpicref = avfilter_ref_pic(inpicref, ~0); + inlink->dst->outputs[0]->outpic = outpicref; + + for (int plane = 0; plane < 4 && outpicref->data[plane]; plane++) { + int hsub = (plane == 1 || plane == 2) ? pad->hsub : 0; + int vsub = (plane == 1 || plane == 2) ? pad->vsub : 0; + + outpicref->data[plane] -= (pad->x >> hsub) * pad->line_step[plane] + + (pad->y >> vsub) * outpicref->linesize[plane]; + } + + avfilter_start_frame(inlink->dst->outputs[0], outpicref); +} + +static void end_frame(AVFilterLink *link) +{ + avfilter_end_frame(link->dst->outputs[0]); + avfilter_unref_pic(link->cur_pic); +} + +static void draw_rectangle(AVFilterPicRef *outpic, uint8_t *line[4], int line_step[4], + int hsub, int vsub, int x, int y, int w, int h) +{ + int i, plane; + uint8_t *p; + + for (plane = 0; plane < 4 && outpic->data[plane]; plane++) { + int hsub1 = plane == 1 || plane == 2 ? hsub : 0; + int vsub1 = plane == 1 || plane == 2 ? vsub : 0; + + p = outpic->data[plane] + (y >> vsub1) * outpic->linesize[plane]; + for (i = 0; i < (h >> vsub1); i++) { + memcpy(p + (x >> hsub1) * line_step[plane], line[plane], (w >> hsub1) * line_step[plane]); + p += outpic->linesize[plane]; + } + } +} + +static void draw_send_bar_slice(AVFilterLink *link, int y, int h, int slice_dir, int before_slice) +{ + PadContext *pad = link->dst->priv; + int bar_y, bar_h = 0; + + if (slice_dir * before_slice == 1 && y == pad->y) { + /* top bar */ + bar_y = 0; + bar_h = pad->y; + } else if (slice_dir * before_slice == -1 && (y + h) == (pad->y + pad->in_h)) { + /* bottom bar */ + bar_y = pad->y + pad->in_h; + bar_h = pad->h - pad->in_h - pad->y; + } + + if (bar_h) { + draw_rectangle(link->dst->outputs[0]->outpic, + pad->line, pad->line_step, pad->hsub, pad->vsub, + 0, bar_y, pad->w, bar_h); + avfilter_draw_slice(link->dst->outputs[0], bar_y, bar_h, slice_dir); + } +} + +static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir) +{ + PadContext *pad = link->dst->priv; + AVFilterPicRef *outpic = link->dst->outputs[0]->outpic; + + y += pad->y; + + y &= ~((1 << pad->vsub) - 1); + h &= ~((1 << pad->vsub) - 1); + + if (!h) + return; + draw_send_bar_slice(link, y, h, slice_dir, 1); + + /* left border */ + draw_rectangle(outpic, pad->line, pad->line_step, pad->hsub, pad->vsub, + 0, y, pad->x, h); + /* right border */ + draw_rectangle(outpic, pad->line, pad->line_step, pad->hsub, pad->vsub, + pad->x + pad->in_w, y, pad->w - pad->x - pad->in_w, h); + avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir); + + draw_send_bar_slice(link, y, h, slice_dir, -1); +} + +AVFilter avfilter_vf_pad = { + .name = "pad", + .description = "Add pads to the input image.", + + .priv_size = sizeof(PadContext), + .init = init, + .uninit = uninit, + .query_formats = query_formats, + + .inputs = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input, + .get_video_buffer = get_video_buffer, + .start_frame = start_frame, + .draw_slice = draw_slice, + .end_frame = end_frame, }, + { .name = NULL}}, + + .outputs = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, }, + { .name = NULL}}, +};