yading@11: /*
yading@11:  * Copyright (c) 2010 Stefano Sabatini
yading@11:  * Copyright (c) 2008 Vitor Sessak
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: /**
yading@11:  * @file
yading@11:  * transposition filter
yading@11:  * Based on MPlayer libmpcodecs/vf_rotate.c.
yading@11:  */
yading@11: 
yading@11: #include <stdio.h>
yading@11: 
yading@11: #include "libavutil/intreadwrite.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "libavutil/pixdesc.h"
yading@11: #include "libavutil/imgutils.h"
yading@11: #include "libavutil/internal.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "avfilter.h"
yading@11: #include "formats.h"
yading@11: #include "internal.h"
yading@11: #include "video.h"
yading@11: 
yading@11: typedef enum {
yading@11:     TRANSPOSE_PT_TYPE_NONE,
yading@11:     TRANSPOSE_PT_TYPE_LANDSCAPE,
yading@11:     TRANSPOSE_PT_TYPE_PORTRAIT,
yading@11: } PassthroughType;
yading@11: 
yading@11: enum TransposeDir {
yading@11:     TRANSPOSE_CCLOCK_FLIP,
yading@11:     TRANSPOSE_CLOCK,
yading@11:     TRANSPOSE_CCLOCK,
yading@11:     TRANSPOSE_CLOCK_FLIP,
yading@11: };
yading@11: 
yading@11: typedef struct {
yading@11:     const AVClass *class;
yading@11:     int hsub, vsub;
yading@11:     int pixsteps[4];
yading@11: 
yading@11:     PassthroughType passthrough; ///< landscape passthrough mode enabled
yading@11:     enum TransposeDir dir;
yading@11: } TransContext;
yading@11: 
yading@11: static int query_formats(AVFilterContext *ctx)
yading@11: {
yading@11:     AVFilterFormats *pix_fmts = NULL;
yading@11:     int fmt;
yading@11: 
yading@11:     for (fmt = 0; fmt < AV_PIX_FMT_NB; fmt++) {
yading@11:         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
yading@11:         if (!(desc->flags & PIX_FMT_PAL ||
yading@11:               desc->flags & PIX_FMT_HWACCEL ||
yading@11:               desc->flags & PIX_FMT_BITSTREAM ||
yading@11:               desc->log2_chroma_w != desc->log2_chroma_h))
yading@11:             ff_add_format(&pix_fmts, fmt);
yading@11:     }
yading@11: 
yading@11: 
yading@11:     ff_set_common_formats(ctx, pix_fmts);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int config_props_output(AVFilterLink *outlink)
yading@11: {
yading@11:     AVFilterContext *ctx = outlink->src;
yading@11:     TransContext *trans = ctx->priv;
yading@11:     AVFilterLink *inlink = ctx->inputs[0];
yading@11:     const AVPixFmtDescriptor *desc_out = av_pix_fmt_desc_get(outlink->format);
yading@11:     const AVPixFmtDescriptor *desc_in  = av_pix_fmt_desc_get(inlink->format);
yading@11: 
yading@11:     if (trans->dir&4) {
yading@11:         av_log(ctx, AV_LOG_WARNING,
yading@11:                "dir values greater than 3 are deprecated, use the passthrough option instead\n");
yading@11:         trans->dir &= 3;
yading@11:         trans->passthrough = TRANSPOSE_PT_TYPE_LANDSCAPE;
yading@11:     }
yading@11: 
yading@11:     if ((inlink->w >= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_LANDSCAPE) ||
yading@11:         (inlink->w <= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_PORTRAIT)) {
yading@11:         av_log(ctx, AV_LOG_VERBOSE,
yading@11:                "w:%d h:%d -> w:%d h:%d (passthrough mode)\n",
yading@11:                inlink->w, inlink->h, inlink->w, inlink->h);
yading@11:         return 0;
yading@11:     } else {
yading@11:         trans->passthrough = TRANSPOSE_PT_TYPE_NONE;
yading@11:     }
yading@11: 
yading@11:     trans->hsub = desc_in->log2_chroma_w;
yading@11:     trans->vsub = desc_in->log2_chroma_h;
yading@11: 
yading@11:     av_image_fill_max_pixsteps(trans->pixsteps, NULL, desc_out);
yading@11: 
yading@11:     outlink->w = inlink->h;
yading@11:     outlink->h = inlink->w;
yading@11: 
yading@11:     if (inlink->sample_aspect_ratio.num){
yading@11:         outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio);
yading@11:     } else
yading@11:         outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
yading@11: 
yading@11:     av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
yading@11:            inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
yading@11:            trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
yading@11:            trans->dir == 0 || trans->dir == 3);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
yading@11: {
yading@11:     TransContext *trans = inlink->dst->priv;
yading@11: 
yading@11:     return trans->passthrough ?
yading@11:         ff_null_get_video_buffer   (inlink, w, h) :
yading@11:         ff_default_get_video_buffer(inlink, w, h);
yading@11: }
yading@11: 
yading@11: static int filter_frame(AVFilterLink *inlink, AVFrame *in)
yading@11: {
yading@11:     TransContext *trans = inlink->dst->priv;
yading@11:     AVFilterLink *outlink = inlink->dst->outputs[0];
yading@11:     AVFrame *out;
yading@11:     int plane;
yading@11: 
yading@11:     if (trans->passthrough)
yading@11:         return ff_filter_frame(outlink, in);
yading@11: 
yading@11:     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
yading@11:     if (!out) {
yading@11:         av_frame_free(&in);
yading@11:         return AVERROR(ENOMEM);
yading@11:     }
yading@11: 
yading@11:     out->pts = in->pts;
yading@11: 
yading@11:     if (in->sample_aspect_ratio.num == 0) {
yading@11:         out->sample_aspect_ratio = in->sample_aspect_ratio;
yading@11:     } else {
yading@11:         out->sample_aspect_ratio.num = in->sample_aspect_ratio.den;
yading@11:         out->sample_aspect_ratio.den = in->sample_aspect_ratio.num;
yading@11:     }
yading@11: 
yading@11:     for (plane = 0; out->data[plane]; plane++) {
yading@11:         int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
yading@11:         int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
yading@11:         int pixstep = trans->pixsteps[plane];
yading@11:         int inh  = in->height  >> vsub;
yading@11:         int outw = out->width  >> hsub;
yading@11:         int outh = out->height >> vsub;
yading@11:         uint8_t *dst, *src;
yading@11:         int dstlinesize, srclinesize;
yading@11:         int x, y;
yading@11: 
yading@11:         dst = out->data[plane];
yading@11:         dstlinesize = out->linesize[plane];
yading@11:         src = in->data[plane];
yading@11:         srclinesize = in->linesize[plane];
yading@11: 
yading@11:         if (trans->dir&1) {
yading@11:             src +=  in->linesize[plane] * (inh-1);
yading@11:             srclinesize *= -1;
yading@11:         }
yading@11: 
yading@11:         if (trans->dir&2) {
yading@11:             dst += out->linesize[plane] * (outh-1);
yading@11:             dstlinesize *= -1;
yading@11:         }
yading@11: 
yading@11:         for (y = 0; y < outh; y++) {
yading@11:             switch (pixstep) {
yading@11:             case 1:
yading@11:                 for (x = 0; x < outw; x++)
yading@11:                     dst[x] = src[x*srclinesize + y];
yading@11:                 break;
yading@11:             case 2:
yading@11:                 for (x = 0; x < outw; x++)
yading@11:                     *((uint16_t *)(dst + 2*x)) = *((uint16_t *)(src + x*srclinesize + y*2));
yading@11:                 break;
yading@11:             case 3:
yading@11:                 for (x = 0; x < outw; x++) {
yading@11:                     int32_t v = AV_RB24(src + x*srclinesize + y*3);
yading@11:                     AV_WB24(dst + 3*x, v);
yading@11:                 }
yading@11:                 break;
yading@11:             case 4:
yading@11:                 for (x = 0; x < outw; x++)
yading@11:                     *((uint32_t *)(dst + 4*x)) = *((uint32_t *)(src + x*srclinesize + y*4));
yading@11:                 break;
yading@11:             case 6:
yading@11:                 for (x = 0; x < outw; x++) {
yading@11:                     int64_t v = AV_RB48(src + x*srclinesize + y*6);
yading@11:                     AV_WB48(dst + 6*x, v);
yading@11:                 }
yading@11:                 break;
yading@11:             case 8:
yading@11:                 for (x = 0; x < outw; x++)
yading@11:                     *((uint64_t *)(dst + 8*x)) = *((uint64_t *)(src + x*srclinesize + y*8));
yading@11:                 break;
yading@11:             }
yading@11:             dst += dstlinesize;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     av_frame_free(&in);
yading@11:     return ff_filter_frame(outlink, out);
yading@11: }
yading@11: 
yading@11: #define OFFSET(x) offsetof(TransContext, x)
yading@11: #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
yading@11: 
yading@11: static const AVOption transpose_options[] = {
yading@11:     { "dir", "Transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP },
yading@11:         TRANSPOSE_CCLOCK_FLIP, TRANSPOSE_CLOCK_FLIP, FLAGS, "dir" },
yading@11:         { "cclock_flip", "counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" },
yading@11:         { "clock",       "clockwise",                            0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK       }, .unit = "dir" },
yading@11:         { "cclock",      "counter-clockwise",                    0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK      }, .unit = "dir" },
yading@11:         { "clock_flip",  "clockwise with vertical flip",         0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP  }, .unit = "dir" },
yading@11: 
yading@11:     { "passthrough", "do not apply transposition if the input matches the specified geometry",
yading@11:       OFFSET(passthrough), AV_OPT_TYPE_INT, {.i64=TRANSPOSE_PT_TYPE_NONE},  0, INT_MAX, FLAGS, "passthrough" },
yading@11:     { "none",      "always apply transposition",   0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_NONE},      INT_MIN, INT_MAX, FLAGS, "passthrough" },
yading@11:     { "portrait",  "preserve portrait geometry",   0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_PORTRAIT},  INT_MIN, INT_MAX, FLAGS, "passthrough" },
yading@11:     { "landscape", "preserve landscape geometry",  0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_LANDSCAPE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
yading@11: 
yading@11:     { NULL },
yading@11: };
yading@11: 
yading@11: AVFILTER_DEFINE_CLASS(transpose);
yading@11: 
yading@11: static const AVFilterPad avfilter_vf_transpose_inputs[] = {
yading@11:     {
yading@11:         .name        = "default",
yading@11:         .type        = AVMEDIA_TYPE_VIDEO,
yading@11:         .get_video_buffer= get_video_buffer,
yading@11:         .filter_frame = filter_frame,
yading@11:     },
yading@11:     { NULL }
yading@11: };
yading@11: 
yading@11: static const AVFilterPad avfilter_vf_transpose_outputs[] = {
yading@11:     {
yading@11:         .name         = "default",
yading@11:         .config_props = config_props_output,
yading@11:         .type         = AVMEDIA_TYPE_VIDEO,
yading@11:     },
yading@11:     { NULL }
yading@11: };
yading@11: 
yading@11: AVFilter avfilter_vf_transpose = {
yading@11:     .name      = "transpose",
yading@11:     .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
yading@11: 
yading@11:     .priv_size = sizeof(TransContext),
yading@11:     .priv_class = &transpose_class,
yading@11: 
yading@11:     .query_formats = query_formats,
yading@11: 
yading@11:     .inputs    = avfilter_vf_transpose_inputs,
yading@11:     .outputs   = avfilter_vf_transpose_outputs,
yading@11: };