/* * Misc image conversion routines * Copyright (c) 2001, 2002, 2003 Fabrice Bellard * * 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 * misc image conversion routines */ /* TODO: * - write 'ffimg' program to test all the image related stuff * - move all api to slice based system * - integrate deinterlacing, postprocessing and scaling in the conversion process */ #include "avcodec.h" #include "dsputil.h" #include "internal.h" #include "imgconvert.h" #include "libavutil/colorspace.h" #include "libavutil/pixdesc.h" #include "libavutil/imgutils.h" #if HAVE_MMX && HAVE_YASM #include "x86/dsputil_mmx.h" #endif #define FF_COLOR_RGB 0 /**< RGB color space */ #define FF_COLOR_GRAY 1 /**< gray color space */ #define FF_COLOR_YUV 2 /**< YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */ #define FF_COLOR_YUV_JPEG 3 /**< YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */ #if HAVE_MMX && HAVE_YASM #define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx #define deinterlace_line ff_deinterlace_line_mmx #else #define deinterlace_line_inplace deinterlace_line_inplace_c #define deinterlace_line deinterlace_line_c #endif typedef struct PixFmtInfo { uint8_t color_type; /**< color type (see FF_COLOR_xxx constants) */ uint8_t is_alpha : 1; /**< true if alpha can be specified */ uint8_t padded_size; /**< padded size in bits if different from the non-padded size */ } PixFmtInfo; /* this table gives more information about formats */ static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = { /* YUV formats */ [PIX_FMT_YUV420P] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV422P] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV444P] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUYV422] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_UYVY422] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV410P] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV411P] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV440P] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV420P16LE] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV422P16LE] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV444P16LE] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV420P16BE] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV422P16BE] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_YUV444P16BE] = { .color_type = FF_COLOR_YUV, }, /* YUV formats with alpha plane */ [PIX_FMT_YUVA420P] = { .color_type = FF_COLOR_YUV, }, /* JPEG YUV */ [PIX_FMT_YUVJ420P] = { .color_type = FF_COLOR_YUV_JPEG, }, [PIX_FMT_YUVJ422P] = { .color_type = FF_COLOR_YUV_JPEG, }, [PIX_FMT_YUVJ444P] = { .color_type = FF_COLOR_YUV_JPEG, }, [PIX_FMT_YUVJ440P] = { .color_type = FF_COLOR_YUV_JPEG, }, /* RGB formats */ [PIX_FMT_RGB24] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_BGR24] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_ARGB] = { .is_alpha = 1, .color_type = FF_COLOR_RGB, }, [PIX_FMT_RGB48BE] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_RGB48LE] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_RGB565BE] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_RGB565LE] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_RGB555BE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_RGB555LE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_RGB444BE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_RGB444LE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, /* gray / mono formats */ [PIX_FMT_GRAY16BE] = { .color_type = FF_COLOR_GRAY, }, [PIX_FMT_GRAY16LE] = { .color_type = FF_COLOR_GRAY, }, [PIX_FMT_GRAY8] = { .color_type = FF_COLOR_GRAY, }, [PIX_FMT_MONOWHITE] = { .color_type = FF_COLOR_GRAY, }, [PIX_FMT_MONOBLACK] = { .color_type = FF_COLOR_GRAY, }, /* paletted formats */ [PIX_FMT_PAL8] = { .is_alpha = 1, .color_type = FF_COLOR_RGB, }, [PIX_FMT_UYYVYY411] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_ABGR] = { .is_alpha = 1, .color_type = FF_COLOR_RGB, }, [PIX_FMT_BGR565BE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_BGR565LE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_BGR555BE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_BGR555LE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_BGR444BE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_BGR444LE] = { .color_type = FF_COLOR_RGB, .padded_size = 16, }, [PIX_FMT_RGB8] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_RGB4] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_RGB4_BYTE] = { .color_type = FF_COLOR_RGB, .padded_size = 8, }, [PIX_FMT_BGR8] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_BGR4] = { .color_type = FF_COLOR_RGB, }, [PIX_FMT_BGR4_BYTE] = { .color_type = FF_COLOR_RGB, .padded_size = 8, }, [PIX_FMT_NV12] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_NV21] = { .color_type = FF_COLOR_YUV, }, [PIX_FMT_BGRA] = { .is_alpha = 1, .color_type = FF_COLOR_RGB, }, [PIX_FMT_RGBA] = { .is_alpha = 1, .color_type = FF_COLOR_RGB, }, }; void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift) { *h_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w; *v_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h; } #if FF_API_GET_PIX_FMT_NAME const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt) { return av_get_pix_fmt_name(pix_fmt); } #endif int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt) { return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL; } int avpicture_fill(AVPicture *picture, uint8_t *ptr, enum PixelFormat pix_fmt, int width, int height) { int ret; if ((ret = av_image_check_size(width, height, 0, NULL)) < 0) return ret; if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0) return ret; return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize); } int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height, unsigned char *dest, int dest_size) { int i, j, nb_planes = 0, linesizes[4]; const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt]; int size = avpicture_get_size(pix_fmt, width, height); if (size > dest_size || size < 0) return AVERROR(EINVAL); for (i = 0; i < desc->nb_components; i++) nb_planes = FFMAX(desc->comp[i].plane, nb_planes); nb_planes++; av_image_fill_linesizes(linesizes, pix_fmt, width); for (i = 0; i < nb_planes; i++) { int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; const unsigned char *s = src->data[i]; h = (height + (1 << shift) - 1) >> shift; for (j = 0; j < h; j++) { memcpy(dest, s, linesizes[i]); dest += linesizes[i]; s += src->linesize[i]; } } if (desc->flags & PIX_FMT_PAL) memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4); return size; } int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height) { AVPicture dummy_pict; if(av_image_check_size(width, height, 0, NULL)) return -1; switch (pix_fmt) { case PIX_FMT_RGB8: case PIX_FMT_BGR8: case PIX_FMT_RGB4_BYTE: case PIX_FMT_BGR4_BYTE: case PIX_FMT_GRAY8: // do not include palette for these pseudo-paletted formats return width * height; } return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height); } static int get_pix_fmt_depth(int *min, int *max, enum PixelFormat pix_fmt) { const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt]; int i; if (!desc->nb_components) { *min = *max = 0; return AVERROR(EINVAL); } *min = INT_MAX, *max = -INT_MAX; for (i = 0; i < desc->nb_components; i++) { *min = FFMIN(desc->comp[i].depth_minus1+1, *min); *max = FFMAX(desc->comp[i].depth_minus1+1, *max); } return 0; } int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt, int has_alpha) { if (dst_pix_fmt>=PIX_FMT_NB || dst_pix_fmt<=PIX_FMT_NONE) return ~0; const PixFmtInfo *pf, *ps; const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt]; const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt]; int src_min_depth, src_max_depth, dst_min_depth, dst_max_depth; int ret, loss; ps = &pix_fmt_info[src_pix_fmt]; /* compute loss */ loss = 0; if ((ret = get_pix_fmt_depth(&src_min_depth, &src_max_depth, src_pix_fmt)) < 0) return ret; if ((ret = get_pix_fmt_depth(&dst_min_depth, &dst_max_depth, dst_pix_fmt)) < 0) return ret; if (dst_min_depth < src_min_depth || dst_max_depth < src_max_depth) loss |= FF_LOSS_DEPTH; if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w || dst_desc->log2_chroma_h > src_desc->log2_chroma_h) loss |= FF_LOSS_RESOLUTION; pf = &pix_fmt_info[dst_pix_fmt]; switch(pf->color_type) { case FF_COLOR_RGB: if (ps->color_type != FF_COLOR_RGB && ps->color_type != FF_COLOR_GRAY) loss |= FF_LOSS_COLORSPACE; break; case FF_COLOR_GRAY: if (ps->color_type != FF_COLOR_GRAY) loss |= FF_LOSS_COLORSPACE; break; case FF_COLOR_YUV: if (ps->color_type != FF_COLOR_YUV) loss |= FF_LOSS_COLORSPACE; break; case FF_COLOR_YUV_JPEG: if (ps->color_type != FF_COLOR_YUV_JPEG && ps->color_type != FF_COLOR_YUV && ps->color_type != FF_COLOR_GRAY) loss |= FF_LOSS_COLORSPACE; break; default: /* fail safe test */ if (ps->color_type != pf->color_type) loss |= FF_LOSS_COLORSPACE; break; } if (pf->color_type == FF_COLOR_GRAY && ps->color_type != FF_COLOR_GRAY) loss |= FF_LOSS_CHROMA; if (!pf->is_alpha && (ps->is_alpha && has_alpha)) loss |= FF_LOSS_ALPHA; if (dst_pix_fmt == PIX_FMT_PAL8 && (src_pix_fmt != PIX_FMT_PAL8 && ps->color_type != FF_COLOR_GRAY)) loss |= FF_LOSS_COLORQUANT; return loss; } static int avg_bits_per_pixel(enum PixelFormat pix_fmt) { const PixFmtInfo *info = &pix_fmt_info[pix_fmt]; const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt]; return info->padded_size ? info->padded_size : av_get_bits_per_pixel(desc); } enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt, int has_alpha, int *loss_ptr) { enum PixelFormat dst_pix_fmt; int i; if (loss_ptr) /* all losses count (for backward compatibility) */ *loss_ptr = 0; dst_pix_fmt = PIX_FMT_NONE; /* so first iteration doesn't have to be treated special */ for(i = 0; i< FFMIN(PIX_FMT_NB, 64); i++){ if (pix_fmt_mask & (1ULL << i)) dst_pix_fmt = avcodec_find_best_pix_fmt2(dst_pix_fmt, i, src_pix_fmt, has_alpha, loss_ptr); } return dst_pix_fmt; } enum PixelFormat avcodec_find_best_pix_fmt2(enum PixelFormat dst_pix_fmt1, enum PixelFormat dst_pix_fmt2, enum PixelFormat src_pix_fmt, int has_alpha, int *loss_ptr) { enum PixelFormat dst_pix_fmt; int loss1, loss2, loss_order1, loss_order2, i, loss_mask; static const int loss_mask_order[] = { ~0, /* no loss first */ ~FF_LOSS_ALPHA, ~FF_LOSS_RESOLUTION, ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION), ~FF_LOSS_COLORQUANT, ~FF_LOSS_DEPTH, ~(FF_LOSS_RESOLUTION | FF_LOSS_DEPTH | FF_LOSS_COLORSPACE | FF_LOSS_ALPHA | FF_LOSS_COLORQUANT | FF_LOSS_CHROMA), 0x80000, //non zero entry that combines all loss variants including future additions 0, }; loss_mask= loss_ptr?~*loss_ptr:~0; /* use loss mask if provided */ dst_pix_fmt = PIX_FMT_NONE; loss1 = avcodec_get_pix_fmt_loss(dst_pix_fmt1, src_pix_fmt, has_alpha) & loss_mask; loss2 = avcodec_get_pix_fmt_loss(dst_pix_fmt2, src_pix_fmt, has_alpha) & loss_mask; /* try with successive loss */ for(i = 0;loss_mask_order[i] != 0 && dst_pix_fmt == PIX_FMT_NONE;i++) { loss_order1 = loss1 & loss_mask_order[i]; loss_order2 = loss2 & loss_mask_order[i]; if (loss_order1 == 0 && loss_order2 == 0){ /* use format with smallest depth */ dst_pix_fmt = avg_bits_per_pixel(dst_pix_fmt2) < avg_bits_per_pixel(dst_pix_fmt1) ? dst_pix_fmt2 : dst_pix_fmt1; } else if (loss_order1 == 0 || loss_order2 == 0) { /* use format with no loss */ dst_pix_fmt = loss_order2 ? dst_pix_fmt1 : dst_pix_fmt2; } } if (loss_ptr) *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha); return dst_pix_fmt; } void av_picture_copy(AVPicture *dst, const AVPicture *src, enum PixelFormat pix_fmt, int width, int height) { av_image_copy(dst->data, dst->linesize, src->data, src->linesize, pix_fmt, width, height); } /* 2x2 -> 1x1 */ void ff_shrink22(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height) { int w; const uint8_t *s1, *s2; uint8_t *d; for(;height > 0; height--) { s1 = src; s2 = s1 + src_wrap; d = dst; for(w = width;w >= 4; w-=4) { d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2; d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2; d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2; d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2; s1 += 8; s2 += 8; d += 4; } for(;w > 0; w--) { d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2; s1 += 2; s2 += 2; d++; } src += 2 * src_wrap; dst += dst_wrap; } } /* 4x4 -> 1x1 */ void ff_shrink44(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height) { int w; const uint8_t *s1, *s2, *s3, *s4; uint8_t *d; for(;height > 0; height--) { s1 = src; s2 = s1 + src_wrap; s3 = s2 + src_wrap; s4 = s3 + src_wrap; d = dst; for(w = width;w > 0; w--) { d[0] = (s1[0] + s1[1] + s1[2] + s1[3] + s2[0] + s2[1] + s2[2] + s2[3] + s3[0] + s3[1] + s3[2] + s3[3] + s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4; s1 += 4; s2 += 4; s3 += 4; s4 += 4; d++; } src += 4 * src_wrap; dst += dst_wrap; } } /* 8x8 -> 1x1 */ void ff_shrink88(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height) { int w, i; for(;height > 0; height--) { for(w = width;w > 0; w--) { int tmp=0; for(i=0; i<8; i++){ tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7]; src += src_wrap; } *(dst++) = (tmp + 32)>>6; src += 8 - 8*src_wrap; } src += 8*src_wrap - 8*width; dst += dst_wrap - width; } } int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height) { int ret; if ((ret = av_image_alloc(picture->data, picture->linesize, width, height, pix_fmt, 1)) < 0) { memset(picture, 0, sizeof(AVPicture)); return ret; } return 0; } void avpicture_free(AVPicture *picture) { av_free(picture->data[0]); } /* return true if yuv planar */ static inline int is_yuv_planar(enum PixelFormat fmt) { const PixFmtInfo *info = &pix_fmt_info[fmt]; const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[fmt]; int i; int planes[4] = { 0 }; if (info->color_type != FF_COLOR_YUV && info->color_type != FF_COLOR_YUV_JPEG) return 0; /* set the used planes */ for (i = 0; i < desc->nb_components; i++) planes[desc->comp[i].plane] = 1; /* if there is an unused plane, the format is not planar */ for (i = 0; i < desc->nb_components; i++) if (!planes[i]) return 0; return 1; } int av_picture_crop(AVPicture *dst, const AVPicture *src, enum PixelFormat pix_fmt, int top_band, int left_band) { int y_shift; int x_shift; if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB) return -1; y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h; x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w; if (is_yuv_planar(pix_fmt)) { dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band; dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift); dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift); } else{ if(top_band % (1<data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band; } dst->linesize[0] = src->linesize[0]; dst->linesize[1] = src->linesize[1]; dst->linesize[2] = src->linesize[2]; return 0; } int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, int *color) { uint8_t *optr; int y_shift; int x_shift; int yheight; int i, y; if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(pix_fmt)) return -1; for (i = 0; i < 3; i++) { x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0; y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0; if (padtop || padleft) { memset(dst->data[i], color[i], dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift)); } if (padleft || padright) { optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + (dst->linesize[i] - (padright >> x_shift)); yheight = (height - 1 - (padtop + padbottom)) >> y_shift; for (y = 0; y < yheight; y++) { memset(optr, color[i], (padleft + padright) >> x_shift); optr += dst->linesize[i]; } } if (src) { /* first line */ uint8_t *iptr = src->data[i]; optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift); memcpy(optr, iptr, (width - padleft - padright) >> x_shift); iptr += src->linesize[i]; optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + (dst->linesize[i] - (padright >> x_shift)); yheight = (height - 1 - (padtop + padbottom)) >> y_shift; for (y = 0; y < yheight; y++) { memset(optr, color[i], (padleft + padright) >> x_shift); memcpy(optr + ((padleft + padright) >> x_shift), iptr, (width - padleft - padright) >> x_shift); iptr += src->linesize[i]; optr += dst->linesize[i]; } } if (padbottom || padright) { optr = dst->data[i] + dst->linesize[i] * ((height - padbottom) >> y_shift) - (padright >> x_shift); memset(optr, color[i],dst->linesize[i] * (padbottom >> y_shift) + (padright >> x_shift)); } } return 0; } /* NOTE: we scan all the pixels to have an exact information */ static int get_alpha_info_pal8(const AVPicture *src, int width, int height) { const unsigned char *p; int src_wrap, ret, x, y; unsigned int a; uint32_t *palette = (uint32_t *)src->data[1]; p = src->data[0]; src_wrap = src->linesize[0] - width; ret = 0; for(y=0;y> 24; if (a == 0x00) { ret |= FF_ALPHA_TRANSP; } else if (a != 0xff) { ret |= FF_ALPHA_SEMI_TRANSP; } p++; } p += src_wrap; } return ret; } int img_get_alpha_info(const AVPicture *src, enum PixelFormat pix_fmt, int width, int height) { const PixFmtInfo *pf = &pix_fmt_info[pix_fmt]; int ret; /* no alpha can be represented in format */ if (!pf->is_alpha) return 0; switch(pix_fmt) { case PIX_FMT_PAL8: ret = get_alpha_info_pal8(src, width, height); break; default: /* we do not know, so everything is indicated */ ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP; break; } return ret; } #if !(HAVE_MMX && HAVE_YASM) /* filter parameters: [-1 4 2 4 -1] // 8 */ static void deinterlace_line_c(uint8_t *dst, const uint8_t *lum_m4, const uint8_t *lum_m3, const uint8_t *lum_m2, const uint8_t *lum_m1, const uint8_t *lum, int size) { uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; int sum; for(;size > 0;size--) { sum = -lum_m4[0]; sum += lum_m3[0] << 2; sum += lum_m2[0] << 1; sum += lum_m1[0] << 2; sum += -lum[0]; dst[0] = cm[(sum + 4) >> 3]; lum_m4++; lum_m3++; lum_m2++; lum_m1++; lum++; dst++; } } static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum, int size) { uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; int sum; for(;size > 0;size--) { sum = -lum_m4[0]; sum += lum_m3[0] << 2; sum += lum_m2[0] << 1; lum_m4[0]=lum_m2[0]; sum += lum_m1[0] << 2; sum += -lum[0]; lum_m2[0] = cm[(sum + 4) >> 3]; lum_m4++; lum_m3++; lum_m2++; lum_m1++; lum++; } } #endif /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The top field is copied as is, but the bottom field is deinterlaced against the top field. */ static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap, const uint8_t *src1, int src_wrap, int width, int height) { const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2; int y; src_m2 = src1; src_m1 = src1; src_0=&src_m1[src_wrap]; src_p1=&src_0[src_wrap]; src_p2=&src_p1[src_wrap]; for(y=0;y<(height-2);y+=2) { memcpy(dst,src_m1,width); dst += dst_wrap; deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width); src_m2 = src_0; src_m1 = src_p1; src_0 = src_p2; src_p1 += 2*src_wrap; src_p2 += 2*src_wrap; dst += dst_wrap; } memcpy(dst,src_m1,width); dst += dst_wrap; /* do last line */ deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width); } static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap, int width, int height) { uint8_t *src_m1, *src_0, *src_p1, *src_p2; int y; uint8_t *buf; buf = (uint8_t*)av_malloc(width); src_m1 = src1; memcpy(buf,src_m1,width); src_0=&src_m1[src_wrap]; src_p1=&src_0[src_wrap]; src_p2=&src_p1[src_wrap]; for(y=0;y<(height-2);y+=2) { deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width); src_m1 = src_p1; src_0 = src_p2; src_p1 += 2*src_wrap; src_p2 += 2*src_wrap; } /* do last line */ deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width); av_free(buf); } int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, enum PixelFormat pix_fmt, int width, int height) { int i; if (pix_fmt != PIX_FMT_YUV420P && pix_fmt != PIX_FMT_YUVJ420P && pix_fmt != PIX_FMT_YUV422P && pix_fmt != PIX_FMT_YUVJ422P && pix_fmt != PIX_FMT_YUV444P && pix_fmt != PIX_FMT_YUV411P && pix_fmt != PIX_FMT_GRAY8) return -1; if ((width & 3) != 0 || (height & 3) != 0) return -1; for(i=0;i<3;i++) { if (i == 1) { switch(pix_fmt) { case PIX_FMT_YUVJ420P: case PIX_FMT_YUV420P: width >>= 1; height >>= 1; break; case PIX_FMT_YUV422P: case PIX_FMT_YUVJ422P: width >>= 1; break; case PIX_FMT_YUV411P: width >>= 2; break; default: break; } if (pix_fmt == PIX_FMT_GRAY8) { break; } } if (src == dst) { deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i], width, height); } else { deinterlace_bottom_field(dst->data[i],dst->linesize[i], src->data[i], src->linesize[i], width, height); } } emms_c(); return 0; }