| /* |
| * Copyright (C) 2006-2010 Michael Niedermayer <michaelni@gmx.at> |
| * 2010 James Darnley <james.darnley@gmail.com> |
| * |
| * FFmpeg is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU 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/cpu.h" |
| #include "libavutil/common.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "yadif.h" |
| |
| #undef NDEBUG |
| #include <assert.h> |
| |
| typedef struct { |
| /** |
| * 0: send 1 frame for each frame |
| * 1: send 1 frame for each field |
| * 2: like 0 but skips spatial interlacing check |
| * 3: like 1 but skips spatial interlacing check |
| */ |
| int mode; |
| |
| /** |
| * 0: bottom field first |
| * 1: top field first |
| * -1: auto-detection |
| */ |
| int parity; |
| |
| int frame_pending; |
| |
| AVFilterBufferRef *cur; |
| AVFilterBufferRef *next; |
| AVFilterBufferRef *prev; |
| AVFilterBufferRef *out; |
| void (*filter_line)(uint8_t *dst, |
| uint8_t *prev, uint8_t *cur, uint8_t *next, |
| int w, int prefs, int mrefs, int parity, int mode); |
| |
| const AVPixFmtDescriptor *csp; |
| } YADIFContext; |
| |
| #define CHECK(j)\ |
| { int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\ |
| + FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\ |
| + FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\ |
| if (score < spatial_score) {\ |
| spatial_score= score;\ |
| spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\ |
| |
| #define FILTER \ |
| for (x = 0; x < w; x++) { \ |
| int c = cur[mrefs]; \ |
| int d = (prev2[0] + next2[0])>>1; \ |
| int e = cur[prefs]; \ |
| int temporal_diff0 = FFABS(prev2[0] - next2[0]); \ |
| int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \ |
| int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \ |
| int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2); \ |
| int spatial_pred = (c+e)>>1; \ |
| int spatial_score = FFABS(cur[mrefs-1] - cur[prefs-1]) + FFABS(c-e) \ |
| + FFABS(cur[mrefs+1] - cur[prefs+1]) - 1; \ |
| \ |
| CHECK(-1) CHECK(-2) }} }} \ |
| CHECK( 1) CHECK( 2) }} }} \ |
| \ |
| if (mode < 2) { \ |
| int b = (prev2[2*mrefs] + next2[2*mrefs])>>1; \ |
| int f = (prev2[2*prefs] + next2[2*prefs])>>1; \ |
| int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e)); \ |
| int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e)); \ |
| \ |
| diff = FFMAX3(diff, min, -max); \ |
| } \ |
| \ |
| if (spatial_pred > d + diff) \ |
| spatial_pred = d + diff; \ |
| else if (spatial_pred < d - diff) \ |
| spatial_pred = d - diff; \ |
| \ |
| dst[0] = spatial_pred; \ |
| \ |
| dst++; \ |
| cur++; \ |
| prev++; \ |
| next++; \ |
| prev2++; \ |
| next2++; \ |
| } |
| |
| static void filter_line_c(uint8_t *dst, |
| uint8_t *prev, uint8_t *cur, uint8_t *next, |
| int w, int prefs, int mrefs, int parity, int mode) |
| { |
| int x; |
| uint8_t *prev2 = parity ? prev : cur ; |
| uint8_t *next2 = parity ? cur : next; |
| |
| FILTER |
| } |
| |
| static void filter_line_c_16bit(uint16_t *dst, |
| uint16_t *prev, uint16_t *cur, uint16_t *next, |
| int w, int prefs, int mrefs, int parity, int mode) |
| { |
| int x; |
| uint16_t *prev2 = parity ? prev : cur ; |
| uint16_t *next2 = parity ? cur : next; |
| mrefs /= 2; |
| prefs /= 2; |
| |
| FILTER |
| } |
| |
| static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic, |
| int parity, int tff) |
| { |
| YADIFContext *yadif = ctx->priv; |
| int y, i; |
| |
| for (i = 0; i < yadif->csp->nb_components; i++) { |
| int w = dstpic->video->w; |
| int h = dstpic->video->h; |
| int refs = yadif->cur->linesize[i]; |
| int df = (yadif->csp->comp[i].depth_minus1+1) / 8; |
| |
| if (i) { |
| /* Why is this not part of the per-plane description thing? */ |
| w >>= yadif->csp->log2_chroma_w; |
| h >>= yadif->csp->log2_chroma_h; |
| } |
| |
| for (y = 0; y < h; y++) { |
| if ((y ^ parity) & 1) { |
| uint8_t *prev = &yadif->prev->data[i][y*refs]; |
| uint8_t *cur = &yadif->cur ->data[i][y*refs]; |
| uint8_t *next = &yadif->next->data[i][y*refs]; |
| uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]]; |
| int mode = y==1 || y+2==h ? 2 : yadif->mode; |
| yadif->filter_line(dst, prev, cur, next, w, y+1<h ? refs : -refs, y ? -refs : refs, parity ^ tff, mode); |
| } else { |
| memcpy(&dstpic->data[i][y*dstpic->linesize[i]], |
| &yadif->cur->data[i][y*refs], w*df); |
| } |
| } |
| } |
| #if HAVE_MMX |
| __asm__ volatile("emms \n\t" : : : "memory"); |
| #endif |
| } |
| |
| static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h) |
| { |
| AVFilterBufferRef *picref; |
| int width = FFALIGN(w, 32); |
| int height= FFALIGN(h+2, 32); |
| int i; |
| |
| picref = avfilter_default_get_video_buffer(link, perms, width, height); |
| |
| picref->video->w = w; |
| picref->video->h = h; |
| |
| for (i = 0; i < 3; i++) |
| picref->data[i] += picref->linesize[i]; |
| |
| return picref; |
| } |
| |
| static void return_frame(AVFilterContext *ctx, int is_second) |
| { |
| YADIFContext *yadif = ctx->priv; |
| AVFilterLink *link= ctx->outputs[0]; |
| int tff; |
| |
| if (yadif->parity == -1) { |
| tff = yadif->cur->video->interlaced ? |
| yadif->cur->video->top_field_first : 1; |
| } else { |
| tff = yadif->parity^1; |
| } |
| |
| if (is_second) |
| yadif->out = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE | |
| AV_PERM_REUSE, link->w, link->h); |
| |
| if (!yadif->csp) |
| yadif->csp = &av_pix_fmt_descriptors[link->format]; |
| if (yadif->csp->comp[0].depth_minus1 == 15) |
| yadif->filter_line = filter_line_c_16bit; |
| |
| filter(ctx, yadif->out, tff ^ !is_second, tff); |
| |
| if (is_second) { |
| if (yadif->next->pts != AV_NOPTS_VALUE && |
| yadif->cur->pts != AV_NOPTS_VALUE) { |
| yadif->out->pts = |
| (yadif->next->pts&yadif->cur->pts) + |
| ((yadif->next->pts^yadif->cur->pts)>>1); |
| } else { |
| yadif->out->pts = AV_NOPTS_VALUE; |
| } |
| avfilter_start_frame(ctx->outputs[0], yadif->out); |
| } |
| avfilter_draw_slice(ctx->outputs[0], 0, link->h, 1); |
| avfilter_end_frame(ctx->outputs[0]); |
| |
| yadif->frame_pending = (yadif->mode&1) && !is_second; |
| } |
| |
| static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref) |
| { |
| AVFilterContext *ctx = link->dst; |
| YADIFContext *yadif = ctx->priv; |
| |
| if (yadif->frame_pending) |
| return_frame(ctx, 1); |
| |
| if (yadif->prev) |
| avfilter_unref_buffer(yadif->prev); |
| yadif->prev = yadif->cur; |
| yadif->cur = yadif->next; |
| yadif->next = picref; |
| |
| if (!yadif->cur) |
| return; |
| |
| if (!yadif->prev) |
| yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ); |
| |
| yadif->out = avfilter_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE | |
| AV_PERM_REUSE, link->w, link->h); |
| |
| avfilter_copy_buffer_ref_props(yadif->out, yadif->cur); |
| yadif->out->video->interlaced = 0; |
| avfilter_start_frame(ctx->outputs[0], yadif->out); |
| } |
| |
| static void end_frame(AVFilterLink *link) |
| { |
| AVFilterContext *ctx = link->dst; |
| YADIFContext *yadif = ctx->priv; |
| |
| if (!yadif->out) |
| return; |
| |
| return_frame(ctx, 0); |
| } |
| |
| static int request_frame(AVFilterLink *link) |
| { |
| AVFilterContext *ctx = link->src; |
| YADIFContext *yadif = ctx->priv; |
| |
| if (yadif->frame_pending) { |
| return_frame(ctx, 1); |
| return 0; |
| } |
| |
| do { |
| int ret; |
| |
| if ((ret = avfilter_request_frame(link->src->inputs[0]))) |
| return ret; |
| } while (!yadif->cur); |
| |
| return 0; |
| } |
| |
| static int poll_frame(AVFilterLink *link) |
| { |
| YADIFContext *yadif = link->src->priv; |
| int ret, val; |
| |
| if (yadif->frame_pending) |
| return 1; |
| |
| val = avfilter_poll_frame(link->src->inputs[0]); |
| |
| if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape |
| if ((ret = avfilter_request_frame(link->src->inputs[0])) < 0) |
| return ret; |
| val = avfilter_poll_frame(link->src->inputs[0]); |
| } |
| assert(yadif->next || !val); |
| |
| return val * ((yadif->mode&1)+1); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| YADIFContext *yadif = ctx->priv; |
| |
| if (yadif->prev) avfilter_unref_buffer(yadif->prev); |
| if (yadif->cur ) avfilter_unref_buffer(yadif->cur ); |
| if (yadif->next) avfilter_unref_buffer(yadif->next); |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum PixelFormat pix_fmts[] = { |
| PIX_FMT_YUV420P, |
| PIX_FMT_YUV422P, |
| PIX_FMT_YUV444P, |
| PIX_FMT_YUV410P, |
| PIX_FMT_YUV411P, |
| PIX_FMT_GRAY8, |
| PIX_FMT_YUVJ420P, |
| PIX_FMT_YUVJ422P, |
| PIX_FMT_YUVJ444P, |
| AV_NE( PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE ), |
| PIX_FMT_YUV440P, |
| PIX_FMT_YUVJ440P, |
| AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ), |
| AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ), |
| AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ), |
| PIX_FMT_NONE |
| }; |
| |
| avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts)); |
| |
| return 0; |
| } |
| |
| static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| YADIFContext *yadif = ctx->priv; |
| av_unused int cpu_flags = av_get_cpu_flags(); |
| |
| yadif->mode = 0; |
| yadif->parity = -1; |
| yadif->csp = NULL; |
| |
| if (args) sscanf(args, "%d:%d", &yadif->mode, &yadif->parity); |
| |
| yadif->filter_line = filter_line_c; |
| if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3) |
| yadif->filter_line = ff_yadif_filter_line_ssse3; |
| else if (HAVE_SSE && cpu_flags & AV_CPU_FLAG_SSE2) |
| yadif->filter_line = ff_yadif_filter_line_sse2; |
| else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) |
| yadif->filter_line = ff_yadif_filter_line_mmx; |
| |
| av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d\n", yadif->mode, yadif->parity); |
| |
| return 0; |
| } |
| |
| static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { } |
| |
| AVFilter avfilter_vf_yadif = { |
| .name = "yadif", |
| .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image"), |
| |
| .priv_size = sizeof(YADIFContext), |
| .init = init, |
| .uninit = uninit, |
| .query_formats = query_formats, |
| |
| .inputs = (AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .start_frame = start_frame, |
| .get_video_buffer = get_video_buffer, |
| .draw_slice = null_draw_slice, |
| .end_frame = end_frame, }, |
| { .name = NULL}}, |
| |
| .outputs = (AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .poll_frame = poll_frame, |
| .request_frame = request_frame, }, |
| { .name = NULL}}, |
| }; |