| /* |
| * Copyright (c) 2007 Benoit Fouet |
| * Copyright (c) 2010 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 |
| * horizontal flip filter |
| */ |
| |
| #include <string.h> |
| |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/internal.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/imgutils.h" |
| |
| typedef struct { |
| int max_step[4]; ///< max pixel step for each plane, expressed as a number of bytes |
| int hsub, vsub; ///< chroma subsampling |
| } FlipContext; |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGB48LE, |
| AV_PIX_FMT_BGR48BE, AV_PIX_FMT_BGR48LE, |
| AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA, |
| AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, |
| AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, |
| AV_PIX_FMT_RGB565BE, AV_PIX_FMT_RGB565LE, |
| AV_PIX_FMT_RGB555BE, AV_PIX_FMT_RGB555LE, |
| AV_PIX_FMT_RGB444BE, AV_PIX_FMT_RGB444LE, |
| AV_PIX_FMT_BGR565BE, AV_PIX_FMT_BGR565LE, |
| AV_PIX_FMT_BGR555BE, AV_PIX_FMT_BGR555LE, |
| AV_PIX_FMT_BGR444BE, AV_PIX_FMT_BGR444LE, |
| AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE, |
| AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUV420P16BE, |
| AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUV422P16BE, |
| AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUV444P16BE, |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, |
| AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, |
| AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, |
| AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_YUVA420P, |
| AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8, |
| AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE, |
| AV_PIX_FMT_PAL8, AV_PIX_FMT_GRAY8, |
| AV_PIX_FMT_NONE |
| }; |
| |
| ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| return 0; |
| } |
| |
| static int config_props(AVFilterLink *inlink) |
| { |
| FlipContext *flip = inlink->dst->priv; |
| const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format); |
| |
| av_image_fill_max_pixsteps(flip->max_step, NULL, pix_desc); |
| flip->hsub = pix_desc->log2_chroma_w; |
| flip->vsub = pix_desc->log2_chroma_h; |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| FlipContext *flip = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFilterBufferRef *out; |
| uint8_t *inrow, *outrow; |
| int i, j, plane, step, hsub, vsub; |
| |
| out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h); |
| if (!out) { |
| avfilter_unref_bufferp(&in); |
| return AVERROR(ENOMEM); |
| } |
| avfilter_copy_buffer_ref_props(out, in); |
| |
| /* copy palette if required */ |
| if (av_pix_fmt_desc_get(inlink->format)->flags & PIX_FMT_PAL) |
| memcpy(out->data[1], in->data[1], AVPALETTE_SIZE); |
| |
| for (plane = 0; plane < 4 && in->data[plane]; plane++) { |
| step = flip->max_step[plane]; |
| hsub = (plane == 1 || plane == 2) ? flip->hsub : 0; |
| vsub = (plane == 1 || plane == 2) ? flip->vsub : 0; |
| |
| outrow = out->data[plane]; |
| inrow = in ->data[plane] + ((inlink->w >> hsub) - 1) * step; |
| for (i = 0; i < in->video->h >> vsub; i++) { |
| switch (step) { |
| case 1: |
| for (j = 0; j < (inlink->w >> hsub); j++) |
| outrow[j] = inrow[-j]; |
| break; |
| |
| case 2: |
| { |
| uint16_t *outrow16 = (uint16_t *)outrow; |
| uint16_t * inrow16 = (uint16_t *) inrow; |
| for (j = 0; j < (inlink->w >> hsub); j++) |
| outrow16[j] = inrow16[-j]; |
| } |
| break; |
| |
| case 3: |
| { |
| uint8_t *in = inrow; |
| uint8_t *out = outrow; |
| for (j = 0; j < (inlink->w >> hsub); j++, out += 3, in -= 3) { |
| int32_t v = AV_RB24(in); |
| AV_WB24(out, v); |
| } |
| } |
| break; |
| |
| case 4: |
| { |
| uint32_t *outrow32 = (uint32_t *)outrow; |
| uint32_t * inrow32 = (uint32_t *) inrow; |
| for (j = 0; j < (inlink->w >> hsub); j++) |
| outrow32[j] = inrow32[-j]; |
| } |
| break; |
| |
| default: |
| for (j = 0; j < (inlink->w >> hsub); j++) |
| memcpy(outrow + j*step, inrow - j*step, step); |
| } |
| |
| inrow += in ->linesize[plane]; |
| outrow += out->linesize[plane]; |
| } |
| } |
| |
| avfilter_unref_bufferp(&in); |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static const AVFilterPad avfilter_vf_hflip_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| .config_props = config_props, |
| .min_perms = AV_PERM_READ, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_hflip_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter avfilter_vf_hflip = { |
| .name = "hflip", |
| .description = NULL_IF_CONFIG_SMALL("Horizontally flip the input video."), |
| .priv_size = sizeof(FlipContext), |
| .query_formats = query_formats, |
| |
| .inputs = avfilter_vf_hflip_inputs, |
| .outputs = avfilter_vf_hflip_outputs, |
| }; |