diff options
Diffstat (limited to 'libavfilter/vf_extractplanes.c')
| -rw-r--r-- | libavfilter/vf_extractplanes.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/libavfilter/vf_extractplanes.c b/libavfilter/vf_extractplanes.c new file mode 100644 index 0000000..fadd2dd --- /dev/null +++ b/libavfilter/vf_extractplanes.c @@ -0,0 +1,335 @@ +/* + * Copyright (c) 2013 Paul B Mahol + * + * 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 + */ + +#include "libavutil/avstring.h" +#include "libavutil/imgutils.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "avfilter.h" +#include "drawutils.h" +#include "internal.h" + +#define PLANE_R 0x01 +#define PLANE_G 0x02 +#define PLANE_B 0x04 +#define PLANE_A 0x08 +#define PLANE_Y 0x10 +#define PLANE_U 0x20 +#define PLANE_V 0x40 + +typedef struct { + const AVClass *class; + int requested_planes; + int map[4]; + int linesize[4]; + int is_packed_rgb; + int depth; + int step; +} ExtractPlanesContext; + +#define OFFSET(x) offsetof(ExtractPlanesContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM +static const AVOption extractplanes_options[] = { + { "planes", "set planes", OFFSET(requested_planes), AV_OPT_TYPE_FLAGS, {.i64=1}, 1, 0xff, FLAGS, "flags"}, + { "y", "set luma plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_Y}, 0, 0, FLAGS, "flags"}, + { "u", "set u plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_U}, 0, 0, FLAGS, "flags"}, + { "v", "set v plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_V}, 0, 0, FLAGS, "flags"}, + { "r", "set red plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_R}, 0, 0, FLAGS, "flags"}, + { "g", "set green plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_G}, 0, 0, FLAGS, "flags"}, + { "b", "set blue plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_B}, 0, 0, FLAGS, "flags"}, + { "a", "set alpha plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_A}, 0, 0, FLAGS, "flags"}, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(extractplanes); + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat in_pixfmts[] = { + AV_PIX_FMT_YUV410P, + AV_PIX_FMT_YUV411P, + AV_PIX_FMT_YUV440P, + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, + AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P, + AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, + AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, + AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, + AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUVA420P16LE, + AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUVA420P16BE, + AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUVA422P16LE, + AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUVA422P16BE, + AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUVA444P16LE, + AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUVA444P16BE, + AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, + AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE, + AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, + AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, + AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, + AV_PIX_FMT_RGB48LE, AV_PIX_FMT_BGR48LE, + AV_PIX_FMT_RGB48BE, AV_PIX_FMT_BGR48BE, + AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_BGRA64LE, + AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_BGRA64BE, + AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, + AV_PIX_FMT_GBRP16LE, AV_PIX_FMT_GBRP16BE, + AV_PIX_FMT_GBRAP16LE, AV_PIX_FMT_GBRAP16BE, + AV_PIX_FMT_NONE, + }; + static const enum AVPixelFormat out8_pixfmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE }; + static const enum AVPixelFormat out16le_pixfmts[] = { AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_NONE }; + static const enum AVPixelFormat out16be_pixfmts[] = { AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE }; + const enum AVPixelFormat *out_pixfmts; + const AVPixFmtDescriptor *desc; + AVFilterFormats *avff; + int i, depth = 0, be = 0; + + if (!ctx->inputs[0]->in_formats || + !ctx->inputs[0]->in_formats->nb_formats) { + return AVERROR(EAGAIN); + } + + if (!ctx->inputs[0]->out_formats) + ff_formats_ref(ff_make_format_list(in_pixfmts), &ctx->inputs[0]->out_formats); + + avff = ctx->inputs[0]->in_formats; + desc = av_pix_fmt_desc_get(avff->formats[0]); + depth = desc->comp[0].depth_minus1; + be = desc->flags & AV_PIX_FMT_FLAG_BE; + for (i = 1; i < avff->nb_formats; i++) { + desc = av_pix_fmt_desc_get(avff->formats[i]); + if (depth != desc->comp[0].depth_minus1 || + be != (desc->flags & AV_PIX_FMT_FLAG_BE)) { + return AVERROR(EAGAIN); + } + } + + if (depth == 7) + out_pixfmts = out8_pixfmts; + else if (be) + out_pixfmts = out16be_pixfmts; + else + out_pixfmts = out16le_pixfmts; + + for (i = 0; i < ctx->nb_outputs; i++) + ff_formats_ref(ff_make_format_list(out_pixfmts), &ctx->outputs[i]->in_formats); + return 0; +} + +static int config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + ExtractPlanesContext *e = ctx->priv; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + int plane_avail, ret, i; + uint8_t rgba_map[4]; + + plane_avail = ((desc->flags & AV_PIX_FMT_FLAG_RGB) ? PLANE_R|PLANE_G|PLANE_B : + PLANE_Y | + ((desc->nb_components > 2) ? PLANE_U|PLANE_V : 0)) | + ((desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? PLANE_A : 0); + if (e->requested_planes & ~plane_avail) { + av_log(ctx, AV_LOG_ERROR, "Requested planes not available.\n"); + return AVERROR(EINVAL); + } + if ((ret = av_image_fill_linesizes(e->linesize, inlink->format, inlink->w)) < 0) + return ret; + + e->depth = (desc->comp[0].depth_minus1 + 1) >> 3; + e->step = av_get_padded_bits_per_pixel(desc) >> 3; + e->is_packed_rgb = !(desc->flags & AV_PIX_FMT_FLAG_PLANAR); + if (desc->flags & AV_PIX_FMT_FLAG_RGB) { + ff_fill_rgba_map(rgba_map, inlink->format); + for (i = 0; i < 4; i++) + e->map[i] = rgba_map[e->map[i]]; + } + + return 0; +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + AVFilterLink *inlink = ctx->inputs[0]; + ExtractPlanesContext *e = ctx->priv; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + const int output = outlink->srcpad - ctx->output_pads; + + if (e->map[output] == 1 || e->map[output] == 2) { + outlink->h = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); + outlink->w = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); + } + + return 0; +} + +static void extract_from_packed(uint8_t *dst, int dst_linesize, + const uint8_t *src, int src_linesize, + int width, int height, + int depth, int step, int comp) +{ + int x, y; + + for (y = 0; y < height; y++) { + switch (depth) { + case 1: + for (x = 0; x < width; x++) + dst[x] = src[x * step + comp]; + break; + case 2: + for (x = 0; x < width; x++) { + dst[x * 2 ] = src[x * step + comp * 2 ]; + dst[x * 2 + 1] = src[x * step + comp * 2 + 1]; + } + break; + } + dst += dst_linesize; + src += src_linesize; + } +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *frame) +{ + AVFilterContext *ctx = inlink->dst; + ExtractPlanesContext *e = ctx->priv; + int i, eof = 0, ret = 0; + + for (i = 0; i < ctx->nb_outputs; i++) { + AVFilterLink *outlink = ctx->outputs[i]; + const int idx = e->map[i]; + AVFrame *out; + + if (outlink->closed) + continue; + + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) { + ret = AVERROR(ENOMEM); + break; + } + av_frame_copy_props(out, frame); + + if (e->is_packed_rgb) { + extract_from_packed(out->data[0], out->linesize[0], + frame->data[0], frame->linesize[0], + outlink->w, outlink->h, + e->depth, + e->step, idx); + } else { + av_image_copy_plane(out->data[0], out->linesize[0], + frame->data[idx], frame->linesize[idx], + e->linesize[idx], outlink->h); + } + + ret = ff_filter_frame(outlink, out); + if (ret == AVERROR_EOF) + eof++; + else if (ret < 0) + break; + } + av_frame_free(&frame); + + if (eof == ctx->nb_outputs) + ret = AVERROR_EOF; + else if (ret == AVERROR_EOF) + ret = 0; + return ret; +} + +static av_cold int init(AVFilterContext *ctx) +{ + ExtractPlanesContext *e = ctx->priv; + int planes = (e->requested_planes & 0xf) | (e->requested_planes >> 4); + int i; + + for (i = 0; i < 4; i++) { + char *name; + AVFilterPad pad = { 0 }; + + if (!(planes & (1 << i))) + continue; + + name = av_asprintf("out%d", ctx->nb_outputs); + if (!name) + return AVERROR(ENOMEM); + e->map[ctx->nb_outputs] = i; + pad.name = name; + pad.type = AVMEDIA_TYPE_VIDEO; + pad.config_props = config_output; + + ff_insert_outpad(ctx, ctx->nb_outputs, &pad); + } + + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + int i; + + for (i = 0; i < ctx->nb_outputs; i++) + av_freep(&ctx->output_pads[i].name); +} + +static const AVFilterPad extractplanes_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .config_props = config_input, + }, + { NULL } +}; + +AVFilter ff_vf_extractplanes = { + .name = "extractplanes", + .description = NULL_IF_CONFIG_SMALL("Extract planes as grayscale frames."), + .priv_size = sizeof(ExtractPlanesContext), + .priv_class = &extractplanes_class, + .init = init, + .uninit = uninit, + .query_formats = query_formats, + .inputs = extractplanes_inputs, + .outputs = NULL, + .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, +}; + +#if CONFIG_ALPHAEXTRACT_FILTER + +static av_cold int init_alphaextract(AVFilterContext *ctx) +{ + ExtractPlanesContext *e = ctx->priv; + + e->requested_planes = PLANE_A; + + return init(ctx); +} + +AVFilter ff_vf_alphaextract = { + .name = "alphaextract", + .description = NULL_IF_CONFIG_SMALL("Extract an alpha channel as a " + "grayscale image component."), + .priv_size = sizeof(ExtractPlanesContext), + .init = init_alphaextract, + .uninit = uninit, + .query_formats = query_formats, + .inputs = extractplanes_inputs, + .outputs = NULL, + .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, +}; +#endif /* CONFIG_ALPHAEXTRACT_FILTER */ |
