| /* |
| * 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 "imgconvert.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/imgutils.h" |
| |
| 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; |
| } |
| |
| 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); |
| } |
| |
| #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI |
| enum AVPixelFormat avcodec_find_best_pix_fmt2(const enum AVPixelFormat *pix_fmt_list, |
| enum AVPixelFormat src_pix_fmt, |
| int has_alpha, int *loss_ptr){ |
| return avcodec_find_best_pix_fmt_of_list(pix_fmt_list, src_pix_fmt, has_alpha, loss_ptr); |
| } |
| #else |
| 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); |
| } |
| #endif |
| |
| 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; |
| |
| for(i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++) |
| best = avcodec_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, loss_ptr); |
| |
| return best; |
| } |
| |
| /* 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; |
| } |
| } |
| |
| /* 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; |
| |
| if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB) |
| return -1; |
| |
| y_shift = desc->log2_chroma_h; |
| x_shift = desc->log2_chroma_w; |
| |
| 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; |
| if(left_band) //FIXME add support for this too |
| return -1; |
| dst->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 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; |
| |
| if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB || |
| !is_yuv_planar(desc)) return -1; |
| |
| 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; |
| } |
| |
| #if FF_API_DEINTERLACE |
| |
| #if HAVE_MMX_EXTERNAL |
| #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 |
| |
| /* 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) |
| { |
| const uint8_t *cm = ff_crop_tab + 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) |
| { |
| const uint8_t *cm = ff_crop_tab + 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 /* !HAVE_MMX_EXTERNAL */ |
| |
| /* 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 = 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 AVPixelFormat pix_fmt, int width, int height) |
| { |
| int i; |
| |
| if (pix_fmt != AV_PIX_FMT_YUV420P && |
| pix_fmt != AV_PIX_FMT_YUVJ420P && |
| pix_fmt != AV_PIX_FMT_YUV422P && |
| pix_fmt != AV_PIX_FMT_YUVJ422P && |
| pix_fmt != AV_PIX_FMT_YUV444P && |
| pix_fmt != AV_PIX_FMT_YUV411P && |
| pix_fmt != AV_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 AV_PIX_FMT_YUVJ420P: |
| case AV_PIX_FMT_YUV420P: |
| width >>= 1; |
| height >>= 1; |
| break; |
| case AV_PIX_FMT_YUV422P: |
| case AV_PIX_FMT_YUVJ422P: |
| width >>= 1; |
| break; |
| case AV_PIX_FMT_YUV411P: |
| width >>= 2; |
| break; |
| default: |
| break; |
| } |
| if (pix_fmt == AV_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; |
| } |
| |
| #endif /* FF_API_DEINTERLACE */ |
| |
| #ifdef TEST |
| |
| int main(void){ |
| int i; |
| int err=0; |
| int skip = 0; |
| |
| for (i=0; i<AV_PIX_FMT_NB*2; i++) { |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i); |
| if(!desc || !desc->name) { |
| skip ++; |
| continue; |
| } |
| if (skip) { |
| av_log(NULL, AV_LOG_INFO, "%3d unused pixel format values\n", skip); |
| skip = 0; |
| } |
| av_log(NULL, AV_LOG_INFO, "pix fmt %s yuv_plan:%d avg_bpp:%d\n", desc->name, is_yuv_planar(desc), av_get_padded_bits_per_pixel(desc)); |
| if ((!(desc->flags & AV_PIX_FMT_FLAG_ALPHA)) != (desc->nb_components != 2 && desc->nb_components != 4)) { |
| av_log(NULL, AV_LOG_ERROR, "Alpha flag mismatch\n"); |
| err = 1; |
| } |
| } |
| return err; |
| } |
| |
| #endif |
