/* * 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 */ #include "avcodec.h" #include "internal.h" #include "mathops.h" #include "libavutil/avassert.h" #include "libavutil/colorspace.h" #include "libavutil/common.h" #include "libavutil/pixdesc.h" #include "libavutil/internal.h" #include "libavutil/imgutils.h" #if FF_API_GETCHROMA void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); av_assert0(desc); *h_shift = desc->log2_chroma_w; *v_shift = desc->log2_chroma_h; } #endif int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, int has_alpha) { return av_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha); } enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr) { return av_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr); } enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr) { return avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr); } enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr){ int i; enum AVPixelFormat best = AV_PIX_FMT_NONE; int loss; for (i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++) { loss = loss_ptr ? *loss_ptr : 0; best = avcodec_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, &loss); } if (loss_ptr) *loss_ptr = loss; return best; } #if FF_API_AVPICTURE FF_DISABLE_DEPRECATION_WARNINGS /* return true if yuv planar */ static inline int is_yuv_planar(const AVPixFmtDescriptor *desc) { int i; int planes[4] = { 0 }; if ( desc->flags & AV_PIX_FMT_FLAG_RGB || !(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) 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 AVPixelFormat pix_fmt, int top_band, int left_band) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); int y_shift; int x_shift; int max_step[4]; if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB) return -1; y_shift = desc->log2_chroma_h; x_shift = desc->log2_chroma_w; av_image_fill_max_pixsteps(max_step, NULL, desc); if (is_yuv_planar(desc)) { 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<<y_shift) || left_band % (1<<x_shift)) return -1; dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + (left_band * max_step[0]); } 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 AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, int *color) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); uint8_t *optr; int y_shift; int x_shift; int yheight; int i, y; int max_step[4]; if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB) return -1; if (!is_yuv_planar(desc)) { if (src) return -1; //TODO: Not yet implemented av_image_fill_max_pixsteps(max_step, NULL, desc); if (padtop || padleft) { memset(dst->data[0], color[0], dst->linesize[0] * padtop + (padleft * max_step[0])); } if (padleft || padright) { optr = dst->data[0] + dst->linesize[0] * padtop + (dst->linesize[0] - (padright * max_step[0])); yheight = height - 1 - (padtop + padbottom); for (y = 0; y < yheight; y++) { memset(optr, color[0], (padleft + padright) * max_step[0]); optr += dst->linesize[0]; } } if (padbottom || padright) { optr = dst->data[0] + dst->linesize[0] * (height - padbottom) - (padright * max_step[0]); memset(optr, color[0], dst->linesize[0] * padbottom + (padright * max_step[0])); } return 0; } for (i = 0; i < 3; i++) { x_shift = i ? desc->log2_chroma_w : 0; y_shift = i ? desc->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; } FF_ENABLE_DEPRECATION_WARNINGS #endif /* FF_API_AVPICTURE */