/* * Copyright (c) 2010 Stefano Sabatini * Copyright (c) 2008 Vitor Sessak * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * transposition filter * Based on MPlayer libmpcodecs/vf_rotate.c. */ #include "libavutil/intreadwrite.h" #include "libavutil/pixdesc.h" #include "libavutil/imgutils.h" #include "avfilter.h" #include "formats.h" #include "internal.h" #include "video.h" typedef struct { int hsub, vsub; int pixsteps[4]; /* 0 Rotate by 90 degrees counterclockwise and vflip. */ /* 1 Rotate by 90 degrees clockwise. */ /* 2 Rotate by 90 degrees counterclockwise. */ /* 3 Rotate by 90 degrees clockwise and vflip. */ int dir; } TransContext; static av_cold int init(AVFilterContext *ctx, const char *args) { TransContext *trans = ctx->priv; trans->dir = 0; if (args) sscanf(args, "%d", &trans->dir); if (trans->dir < 0 || trans->dir > 3) { av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n", trans->dir); return AVERROR(EINVAL); } return 0; } static int query_formats(AVFilterContext *ctx) { enum PixelFormat pix_fmts[] = { PIX_FMT_ARGB, PIX_FMT_RGBA, PIX_FMT_ABGR, PIX_FMT_BGRA, PIX_FMT_RGB24, PIX_FMT_BGR24, PIX_FMT_RGB565BE, PIX_FMT_RGB565LE, PIX_FMT_RGB555BE, PIX_FMT_RGB555LE, PIX_FMT_BGR565BE, PIX_FMT_BGR565LE, PIX_FMT_BGR555BE, PIX_FMT_BGR555LE, PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE, PIX_FMT_YUV420P16LE, PIX_FMT_YUV420P16BE, PIX_FMT_YUV422P16LE, PIX_FMT_YUV422P16BE, PIX_FMT_YUV444P16LE, PIX_FMT_YUV444P16BE, PIX_FMT_NV12, PIX_FMT_NV21, PIX_FMT_RGB8, PIX_FMT_BGR8, PIX_FMT_RGB4_BYTE, PIX_FMT_BGR4_BYTE, PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P, PIX_FMT_YUVJ420P, PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, PIX_FMT_YUV440P, PIX_FMT_YUVJ440P, PIX_FMT_YUVA420P, PIX_FMT_GRAY8, PIX_FMT_NONE }; ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); return 0; } static int config_props_output(AVFilterLink *outlink) { AVFilterContext *ctx = outlink->src; TransContext *trans = ctx->priv; AVFilterLink *inlink = ctx->inputs[0]; const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[outlink->format]; trans->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w; trans->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h; av_image_fill_max_pixsteps(trans->pixsteps, NULL, pixdesc); outlink->w = inlink->h; outlink->h = inlink->w; if (inlink->sample_aspect_ratio.num){ outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio); } else outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n", inlink->w, inlink->h, trans->dir, outlink->w, outlink->h, trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise", trans->dir == 0 || trans->dir == 3); return 0; } static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref) { AVFilterLink *outlink = inlink->dst->outputs[0]; outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h); if (!outlink->out_buf) return AVERROR(ENOMEM); outlink->out_buf->pts = picref->pts; if (picref->video->pixel_aspect.num == 0) { outlink->out_buf->video->pixel_aspect = picref->video->pixel_aspect; } else { outlink->out_buf->video->pixel_aspect.num = picref->video->pixel_aspect.den; outlink->out_buf->video->pixel_aspect.den = picref->video->pixel_aspect.num; } return ff_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0)); } static int end_frame(AVFilterLink *inlink) { TransContext *trans = inlink->dst->priv; AVFilterBufferRef *inpic = inlink->cur_buf; AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf; AVFilterLink *outlink = inlink->dst->outputs[0]; int plane, ret; for (plane = 0; outpic->data[plane]; plane++) { int hsub = plane == 1 || plane == 2 ? trans->hsub : 0; int vsub = plane == 1 || plane == 2 ? trans->vsub : 0; int pixstep = trans->pixsteps[plane]; int inh = inpic->video->h>>vsub; int outw = outpic->video->w>>hsub; int outh = outpic->video->h>>vsub; uint8_t *out, *in; int outlinesize, inlinesize; int x, y; out = outpic->data[plane]; outlinesize = outpic->linesize[plane]; in = inpic ->data[plane]; inlinesize = inpic ->linesize[plane]; if (trans->dir&1) { in += inpic->linesize[plane] * (inh-1); inlinesize *= -1; } if (trans->dir&2) { out += outpic->linesize[plane] * (outh-1); outlinesize *= -1; } for (y = 0; y < outh; y++) { switch (pixstep) { case 1: for (x = 0; x < outw; x++) out[x] = in[x*inlinesize + y]; break; case 2: for (x = 0; x < outw; x++) *((uint16_t *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + y*2)); break; case 3: for (x = 0; x < outw; x++) { int32_t v = AV_RB24(in + x*inlinesize + y*3); AV_WB24(out + 3*x, v); } break; case 4: for (x = 0; x < outw; x++) *((uint32_t *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4)); break; } out += outlinesize; } } if ((ret = ff_draw_slice(outlink, 0, outpic->video->h, 1)) < 0 || (ret = ff_end_frame(outlink)) < 0) return ret; return 0; } AVFilter avfilter_vf_transpose = { .name = "transpose", .description = NULL_IF_CONFIG_SMALL("Transpose input video."), .init = init, .priv_size = sizeof(TransContext), .query_formats = query_formats, .inputs = (const AVFilterPad[]) {{ .name = "default", .type = AVMEDIA_TYPE_VIDEO, .start_frame = start_frame, .end_frame = end_frame, .min_perms = AV_PERM_READ, }, { .name = NULL}}, .outputs = (const AVFilterPad[]) {{ .name = "default", .config_props = config_props_output, .type = AVMEDIA_TYPE_VIDEO, }, { .name = NULL}}, };