/* * Misc image convertion routines * Copyright (c) 2001, 2002, 2003 Fabrice Bellard. * * This library 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 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /** * @file imgconvert.c * Misc image convertion 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 */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "avcodec.h" #include #include "dsputil.h" #include #ifdef HAVE_MMX #include "mmx.h" #endif #define xglue(x, y) x ## y #define glue(x, y) xglue(x, y) #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 */ #define FF_PIXEL_PLANAR 0 /* each channel has one component in AVPicture */ #define FF_PIXEL_PACKED 1 /* only one components containing all the channels */ #define FF_PIXEL_PALETTE 2 /* one components containing indexes for a palette */ typedef struct PixFmtInfo { const char *name; uint8_t nb_channels; /* number of channels (including alpha) */ uint8_t color_type; /* color type (see FF_COLOR_xxx constants) */ uint8_t pixel_type; /* pixel storage type (see FF_PIXEL_xxx constants) */ uint8_t is_alpha:1; /* true if alpha can be specified */ uint8_t x_chroma_shift; /* X chroma subsampling factor is 2 ^ shift */ uint8_t y_chroma_shift; /* Y chroma subsampling factor is 2 ^ shift */ uint8_t depth; /* bit depth of the color components */ } PixFmtInfo; /* this table gives more information about formats */ static PixFmtInfo pix_fmt_info[PIX_FMT_NB] = { /* YUV formats */ /* [PIX_FMT_YUV420P] = */ { /* .name = */ "yuv420p", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_YUV, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 1, /* .y_chroma_shift = */ 1, /* .depth = */ 8, }, /* [PIX_FMT_YUV422] = */ { /* .name = */ "yuv422", /* .nb_channels = */ 1, /* .color_type = */ FF_COLOR_YUV, /* .pixel_type = */ FF_PIXEL_PACKED, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 1, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_RGB24] = */ { /* .name = */ "rgb24", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_RGB, /* .pixel_type = */ FF_PIXEL_PACKED, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_BGR24] = */ { /* .name = */ "bgr24", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_RGB, /* .pixel_type = */ FF_PIXEL_PACKED, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_YUV422P] = */ { /* .name = */ "yuv422p", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_YUV, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 1, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_YUV444P] = */ { /* .name = */ "yuv444p", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_YUV, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_RGBA32] = */ { /* .name = */ "rgba32", /* .nb_channels = */ 4, /* .color_type = */ FF_COLOR_RGB, /* .pixel_type = */ FF_PIXEL_PACKED, /* .is_alpha = */ 1, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_YUV410P] = */ { /* .name = */ "yuv410p", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_YUV, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 2, /* .y_chroma_shift = */ 2, /* .depth = */ 8, }, /* [PIX_FMT_YUV411P] = */ { /* .name = */ "yuv411p", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_YUV, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 2, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_RGB565] = */ { /* .name = */ "rgb565", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_RGB, /* .pixel_type = */ FF_PIXEL_PACKED, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 5, }, /* [PIX_FMT_RGB555] = */ { /* .name = */ "rgb555", /* .nb_channels = */ 4, /* .color_type = */ FF_COLOR_RGB, /* .pixel_type = */ FF_PIXEL_PACKED, /* .is_alpha = */ 1, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 5, }, /* [PIX_FMT_GRAY8] = */ { /* .name = */ "gray", /* .nb_channels = */ 1, /* .color_type = */ FF_COLOR_GRAY, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_MONOWHITE] = */ { /* .name = */ "monow", /* .nb_channels = */ 1, /* .color_type = */ FF_COLOR_GRAY, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 1, }, /* [PIX_FMT_MONOBLACK] = */ { /* .name = */ "monob", /* .nb_channels = */ 1, /* .color_type = */ FF_COLOR_GRAY, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 1, }, /* [PIX_FMT_PAL8] = */ { /* .name = */ "pal8", /* .nb_channels = */ 4, /* .color_type = */ FF_COLOR_RGB, /* .pixel_type = */ FF_PIXEL_PALETTE, /* .is_alpha = */ 1, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* JPEG YUV */ /* [PIX_FMT_YUVJ420P] = */ { /* .name = */ "yuvj420p", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_YUV_JPEG, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 1, /* .y_chroma_shift = */ 1, /* .depth = */ 8, }, /* [PIX_FMT_YUVJ422P] = */ { /* .name = */ "yuvj422p", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_YUV_JPEG, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 1, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, /* [PIX_FMT_YUVJ444P] = */ { /* .name = */ "yuvj444p", /* .nb_channels = */ 3, /* .color_type = */ FF_COLOR_YUV_JPEG, /* .pixel_type = */ FF_PIXEL_PLANAR, /* .is_alpha = */ 0, /* .x_chroma_shift = */ 0, /* .y_chroma_shift = */ 0, /* .depth = */ 8, }, }; void avcodec_get_chroma_sub_sample (int pix_fmt, int *h_shift, int *v_shift) { *h_shift = pix_fmt_info[pix_fmt].x_chroma_shift; *v_shift = pix_fmt_info[pix_fmt].y_chroma_shift; } const char * avcodec_get_pix_fmt_name (int pix_fmt) { if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB) return "???"; else return pix_fmt_info[pix_fmt].name; } enum PixelFormat avcodec_get_pix_fmt (const char *name) { int i; for (i = 0; i < PIX_FMT_NB; i++) if (!strcmp (pix_fmt_info[i].name, name)) break; return i; } /* Picture field are filled with 'ptr' addresses. Also return size */ int avpicture_fill (AVPicture * picture, uint8_t * ptr, int pix_fmt, int width, int height) { int size, w2, h2, size2; PixFmtInfo *pinfo; pinfo = &pix_fmt_info[pix_fmt]; size = width * height; switch (pix_fmt) { case PIX_FMT_YUV420P: case PIX_FMT_YUV422P: case PIX_FMT_YUV444P: case PIX_FMT_YUV410P: case PIX_FMT_YUV411P: case PIX_FMT_YUVJ420P: case PIX_FMT_YUVJ422P: case PIX_FMT_YUVJ444P: w2 = (width + (1 << pinfo->x_chroma_shift) - 1) >> pinfo->x_chroma_shift; h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift; size2 = w2 * h2; picture->data[0] = ptr; picture->data[1] = picture->data[0] + size; picture->data[2] = picture->data[1] + size2; picture->linesize[0] = width; picture->linesize[1] = w2; picture->linesize[2] = w2; return size + 2 * size2; case PIX_FMT_RGB24: case PIX_FMT_BGR24: picture->data[0] = ptr; picture->data[1] = NULL; picture->data[2] = NULL; picture->linesize[0] = width * 3; return size * 3; case PIX_FMT_RGBA32: picture->data[0] = ptr; picture->data[1] = NULL; picture->data[2] = NULL; picture->linesize[0] = width * 4; return size * 4; case PIX_FMT_RGB555: case PIX_FMT_RGB565: case PIX_FMT_YUV422: picture->data[0] = ptr; picture->data[1] = NULL; picture->data[2] = NULL; picture->linesize[0] = width * 2; return size * 2; case PIX_FMT_GRAY8: picture->data[0] = ptr; picture->data[1] = NULL; picture->data[2] = NULL; picture->linesize[0] = width; return size; case PIX_FMT_MONOWHITE: case PIX_FMT_MONOBLACK: picture->data[0] = ptr; picture->data[1] = NULL; picture->data[2] = NULL; picture->linesize[0] = (width + 7) >> 3; return picture->linesize[0] * height; case PIX_FMT_PAL8: size2 = (size + 3) & ~3; picture->data[0] = ptr; picture->data[1] = ptr + size2; /* palette is stored here as 256 32 bit words */ picture->data[2] = NULL; picture->linesize[0] = width; picture->linesize[1] = 4; return size2 + 256 * 4; default: picture->data[0] = NULL; picture->data[1] = NULL; picture->data[2] = NULL; picture->data[3] = NULL; return -1; } } int avpicture_layout (const AVPicture * src, int pix_fmt, int width, int height, unsigned char *dest, int dest_size) { PixFmtInfo *pf = &pix_fmt_info[pix_fmt]; int i, j, w, h, data_planes; const unsigned char *s; int size = avpicture_get_size (pix_fmt, width, height); if (size > dest_size) return -1; if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) { if (pix_fmt == PIX_FMT_YUV422 || pix_fmt == PIX_FMT_RGB565 || pix_fmt == PIX_FMT_RGB555) w = width * 2; else if (pix_fmt == PIX_FMT_PAL8) w = width; else w = width * (pf->depth * pf->nb_channels / 8); data_planes = 1; h = height; } else { data_planes = pf->nb_channels; w = width; h = height; } for (i = 0; i < data_planes; i++) { if (i == 1) { w = width >> pf->x_chroma_shift; h = height >> pf->y_chroma_shift; } s = src->data[i]; for (j = 0; j < h; j++) { memcpy (dest, s, w); dest += w; s += src->linesize[i]; } } if (pf->pixel_type == FF_PIXEL_PALETTE) memcpy ((unsigned char *) (((size_t) dest + 3) & ~3), src->data[1], 256 * 4); return size; } int avpicture_get_size (int pix_fmt, int width, int height) { AVPicture dummy_pict; return avpicture_fill (&dummy_pict, NULL, pix_fmt, width, height); } /** * compute the loss when converting from a pixel format to another */ int avcodec_get_pix_fmt_loss (int dst_pix_fmt, int src_pix_fmt, int has_alpha) { const PixFmtInfo *pf, *ps; int loss; ps = &pix_fmt_info[src_pix_fmt]; pf = &pix_fmt_info[dst_pix_fmt]; /* compute loss */ loss = 0; pf = &pix_fmt_info[dst_pix_fmt]; if (pf->depth < ps->depth || (dst_pix_fmt == PIX_FMT_RGB555 && src_pix_fmt == PIX_FMT_RGB565)) loss |= FF_LOSS_DEPTH; if (pf->x_chroma_shift > ps->x_chroma_shift || pf->y_chroma_shift > ps->y_chroma_shift) loss |= FF_LOSS_RESOLUTION; 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 (pf->pixel_type == FF_PIXEL_PALETTE && (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY)) loss |= FF_LOSS_COLORQUANT; return loss; } static int avg_bits_per_pixel (int pix_fmt) { int bits; const PixFmtInfo *pf; pf = &pix_fmt_info[pix_fmt]; switch (pf->pixel_type) { case FF_PIXEL_PACKED: switch (pix_fmt) { case PIX_FMT_YUV422: case PIX_FMT_RGB565: case PIX_FMT_RGB555: bits = 16; break; default: bits = pf->depth * pf->nb_channels; break; } break; case FF_PIXEL_PLANAR: if (pf->x_chroma_shift == 0 && pf->y_chroma_shift == 0) { bits = pf->depth * pf->nb_channels; } else { bits = pf->depth + ((2 * pf->depth) >> (pf->x_chroma_shift + pf->y_chroma_shift)); } break; case FF_PIXEL_PALETTE: bits = 8; break; default: bits = -1; break; } return bits; } static int avcodec_find_best_pix_fmt1 (int pix_fmt_mask, int src_pix_fmt, int has_alpha, int loss_mask) { int dist, i, loss, min_dist, dst_pix_fmt; /* find exact color match with smallest size */ dst_pix_fmt = -1; min_dist = 0x7fffffff; for (i = 0; i < PIX_FMT_NB; i++) { if (pix_fmt_mask & (1 << i)) { loss = avcodec_get_pix_fmt_loss (i, src_pix_fmt, has_alpha) & loss_mask; if (loss == 0) { dist = avg_bits_per_pixel (i); if (dist < min_dist) { min_dist = dist; dst_pix_fmt = i; } } } } return dst_pix_fmt; } /** * find best pixel format to convert to. Return -1 if none found */ int avcodec_find_best_pix_fmt (int pix_fmt_mask, int src_pix_fmt, int has_alpha, int *loss_ptr) { int dst_pix_fmt, loss_mask, i; 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, 0, }; /* try with successive loss */ i = 0; for (;;) { loss_mask = loss_mask_order[i++]; dst_pix_fmt = avcodec_find_best_pix_fmt1 (pix_fmt_mask, src_pix_fmt, has_alpha, loss_mask); if (dst_pix_fmt >= 0) goto found; if (loss_mask == 0) break; } return -1; found: if (loss_ptr) *loss_ptr = avcodec_get_pix_fmt_loss (dst_pix_fmt, src_pix_fmt, has_alpha); return dst_pix_fmt; } static void img_copy_plane (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { for (; height > 0; height--) { memcpy (dst, src, width); dst += dst_wrap; src += src_wrap; } } /** * Copy image 'src' to 'dst'. */ void img_copy (AVPicture * dst, const AVPicture * src, int pix_fmt, int width, int height) { int bwidth, bits, i; PixFmtInfo *pf = &pix_fmt_info[pix_fmt]; pf = &pix_fmt_info[pix_fmt]; switch (pf->pixel_type) { case FF_PIXEL_PACKED: switch (pix_fmt) { case PIX_FMT_YUV422: case PIX_FMT_RGB565: case PIX_FMT_RGB555: bits = 16; break; default: bits = pf->depth * pf->nb_channels; break; } bwidth = (width * bits + 7) >> 3; img_copy_plane (dst->data[0], dst->linesize[0], src->data[0], src->linesize[0], bwidth, height); break; case FF_PIXEL_PLANAR: for (i = 0; i < pf->nb_channels; i++) { int w, h; w = width; h = height; if (i == 1 || i == 2) { w >>= pf->x_chroma_shift; h >>= pf->y_chroma_shift; } bwidth = (w * pf->depth + 7) >> 3; img_copy_plane (dst->data[i], dst->linesize[i], src->data[i], src->linesize[i], bwidth, h); } break; case FF_PIXEL_PALETTE: img_copy_plane (dst->data[0], dst->linesize[0], src->data[0], src->linesize[0], width, height); /* copy the palette */ img_copy_plane (dst->data[1], dst->linesize[1], src->data[1], src->linesize[1], 4, 256); break; } } /* XXX: totally non optimized */ static void yuv422_to_yuv420p (AVPicture * dst, const AVPicture * src, int width, int height) { const uint8_t *p, *p1; uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1; int w; p1 = src->data[0]; lum1 = dst->data[0]; cb1 = dst->data[1]; cr1 = dst->data[2]; for (; height >= 1; height -= 2) { p = p1; lum = lum1; cb = cb1; cr = cr1; for (w = width; w >= 2; w -= 2) { lum[0] = p[0]; cb[0] = p[1]; lum[1] = p[2]; cr[0] = p[3]; p += 4; lum += 2; cb++; cr++; } if (w) { lum[0] = p[0]; cb[0] = p[1]; cr[0] = p[3]; cb++; cr++; } p1 += src->linesize[0]; lum1 += dst->linesize[0]; if (height > 1) { p = p1; lum = lum1; for (w = width; w >= 2; w -= 2) { lum[0] = p[0]; lum[1] = p[2]; p += 4; lum += 2; } if (w) { lum[0] = p[0]; } p1 += src->linesize[0]; lum1 += dst->linesize[0]; } cb1 += dst->linesize[1]; cr1 += dst->linesize[2]; } } static void yuv422_to_yuv422p (AVPicture * dst, const AVPicture * src, int width, int height) { const uint8_t *p, *p1; uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1; int w; p1 = src->data[0]; lum1 = dst->data[0]; cb1 = dst->data[1]; cr1 = dst->data[2]; for (; height > 0; height--) { p = p1; lum = lum1; cb = cb1; cr = cr1; for (w = width; w >= 2; w -= 2) { lum[0] = p[0]; cb[0] = p[1]; lum[1] = p[2]; cr[0] = p[3]; p += 4; lum += 2; cb++; cr++; } p1 += src->linesize[0]; lum1 += dst->linesize[0]; cb1 += dst->linesize[1]; cr1 += dst->linesize[2]; } } static void yuv422p_to_yuv422 (AVPicture * dst, const AVPicture * src, int width, int height) { uint8_t *p, *p1; const uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1; int w; p1 = dst->data[0]; lum1 = src->data[0]; cb1 = src->data[1]; cr1 = src->data[2]; for (; height > 0; height--) { p = p1; lum = lum1; cb = cb1; cr = cr1; for (w = width; w >= 2; w -= 2) { p[0] = lum[0]; p[1] = cb[0]; p[2] = lum[1]; p[3] = cr[0]; p += 4; lum += 2; cb++; cr++; } p1 += dst->linesize[0]; lum1 += src->linesize[0]; cb1 += src->linesize[1]; cr1 += src->linesize[2]; } } #define SCALEBITS 10 #define ONE_HALF (1 << (SCALEBITS - 1)) #define FIX(x) ((int) ((x) * (1<> SCALEBITS];\ g = cm[(y + g_add) >> SCALEBITS];\ b = cm[(y + b_add) >> SCALEBITS];\ } #define YUV_TO_RGB1(cb1, cr1)\ {\ cb = (cb1) - 128;\ cr = (cr1) - 128;\ r_add = FIX(1.40200) * cr + ONE_HALF;\ g_add = - FIX(0.34414) * cb - FIX(0.71414) * cr + ONE_HALF;\ b_add = FIX(1.77200) * cb + ONE_HALF;\ } #define YUV_TO_RGB2(r, g, b, y1)\ {\ y = (y1) << SCALEBITS;\ r = cm[(y + r_add) >> SCALEBITS];\ g = cm[(y + g_add) >> SCALEBITS];\ b = cm[(y + b_add) >> SCALEBITS];\ } #define Y_CCIR_TO_JPEG(y)\ cm[((y) * FIX(255.0/219.0) + (ONE_HALF - 16 * FIX(255.0/219.0))) >> SCALEBITS] #define Y_JPEG_TO_CCIR(y)\ (((y) * FIX(219.0/255.0) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS) #define C_CCIR_TO_JPEG(y)\ cm[(((y) - 128) * FIX(127.0/112.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS] /* NOTE: the clamp is really necessary! */ static inline int C_JPEG_TO_CCIR (int y) { y = (((y - 128) * FIX (112.0 / 127.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS); if (y < 16) y = 16; return y; } #define RGB_TO_Y(r, g, b) \ ((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \ FIX(0.11400) * (b) + ONE_HALF) >> SCALEBITS) #define RGB_TO_U(r1, g1, b1, shift)\ (((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + \ FIX(0.50000) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128) #define RGB_TO_V(r1, g1, b1, shift)\ (((FIX(0.50000) * r1 - FIX(0.41869) * g1 - \ FIX(0.08131) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128) #define RGB_TO_Y_CCIR(r, g, b) \ ((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \ FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS) #define RGB_TO_U_CCIR(r1, g1, b1, shift)\ (((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 + \ FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128) #define RGB_TO_V_CCIR(r1, g1, b1, shift)\ (((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 - \ FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128) static uint8_t y_ccir_to_jpeg[256]; static uint8_t y_jpeg_to_ccir[256]; static uint8_t c_ccir_to_jpeg[256]; static uint8_t c_jpeg_to_ccir[256]; /* init various conversion tables */ static void img_convert_init (void) { int i; uint8_t *cm = cropTbl + MAX_NEG_CROP; for (i = 0; i < 256; i++) { y_ccir_to_jpeg[i] = Y_CCIR_TO_JPEG (i); y_jpeg_to_ccir[i] = Y_JPEG_TO_CCIR (i); c_ccir_to_jpeg[i] = C_CCIR_TO_JPEG (i); c_jpeg_to_ccir[i] = C_JPEG_TO_CCIR (i); } } /* apply to each pixel the given table */ static void img_apply_table (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height, const uint8_t * table1) { int n; const uint8_t *s; uint8_t *d; const uint8_t *table; table = table1; for (; height > 0; height--) { s = src; d = dst; n = width; while (n >= 4) { d[0] = table[s[0]]; d[1] = table[s[1]]; d[2] = table[s[2]]; d[3] = table[s[3]]; d += 4; s += 4; n -= 4; } while (n > 0) { d[0] = table[s[0]]; d++; s++; n--; } dst += dst_wrap; src += src_wrap; } } /* XXX: use generic filter ? */ /* XXX: in most cases, the sampling position is incorrect */ /* 4x1 -> 1x1 */ static void shrink41 (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { int w; const uint8_t *s; uint8_t *d; for (; height > 0; height--) { s = src; d = dst; for (w = width; w > 0; w--) { d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2; s += 4; d++; } src += src_wrap; dst += dst_wrap; } } /* 2x1 -> 1x1 */ static void shrink21 (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { int w; const uint8_t *s; uint8_t *d; for (; height > 0; height--) { s = src; d = dst; for (w = width; w > 0; w--) { d[0] = (s[0] + s[1]) >> 1; s += 2; d++; } src += src_wrap; dst += dst_wrap; } } /* 1x2 -> 1x1 */ static void shrink12 (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { int w; uint8_t *d; const uint8_t *s1, *s2; for (; height > 0; height--) { s1 = src; s2 = s1 + src_wrap; d = dst; for (w = width; w >= 4; w -= 4) { d[0] = (s1[0] + s2[0]) >> 1; d[1] = (s1[1] + s2[1]) >> 1; d[2] = (s1[2] + s2[2]) >> 1; d[3] = (s1[3] + s2[3]) >> 1; s1 += 4; s2 += 4; d += 4; } for (; w > 0; w--) { d[0] = (s1[0] + s2[0]) >> 1; s1++; s2++; d++; } src += 2 * src_wrap; dst += dst_wrap; } } /* 2x2 -> 1x1 */ static void 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 */ static void 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; } } static void grow21_line (uint8_t * dst, const uint8_t * src, int width) { int w; const uint8_t *s1; uint8_t *d; s1 = src; d = dst; for (w = width; w >= 4; w -= 4) { d[1] = d[0] = s1[0]; d[3] = d[2] = s1[1]; s1 += 2; d += 4; } for (; w >= 2; w -= 2) { d[1] = d[0] = s1[0]; s1++; d += 2; } /* only needed if width is not a multiple of two */ /* XXX: veryfy that */ if (w) { d[0] = s1[0]; } } static void grow41_line (uint8_t * dst, const uint8_t * src, int width) { int w, v; const uint8_t *s1; uint8_t *d; s1 = src; d = dst; for (w = width; w >= 4; w -= 4) { v = s1[0]; d[0] = v; d[1] = v; d[2] = v; d[3] = v; s1++; d += 4; } } /* 1x1 -> 2x1 */ static void grow21 (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { for (; height > 0; height--) { grow21_line (dst, src, width); src += src_wrap; dst += dst_wrap; } } /* 1x1 -> 2x2 */ static void grow22 (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { for (; height > 0; height--) { grow21_line (dst, src, width); if (height % 2) src += src_wrap; dst += dst_wrap; } } /* 1x1 -> 4x1 */ static void grow41 (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { for (; height > 0; height--) { grow41_line (dst, src, width); src += src_wrap; dst += dst_wrap; } } /* 1x1 -> 4x4 */ static void grow44 (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { for (; height > 0; height--) { grow41_line (dst, src, width); if ((height & 3) == 1) src += src_wrap; dst += dst_wrap; } } /* 1x2 -> 2x1 */ static void conv411 (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height) { int w, c; const uint8_t *s1, *s2; uint8_t *d; width >>= 1; for (; height > 0; height--) { s1 = src; s2 = src + src_wrap; d = dst; for (w = width; w > 0; w--) { c = (s1[0] + s2[0]) >> 1; d[0] = c; d[1] = c; s1++; s2++; d += 2; } src += src_wrap * 2; dst += dst_wrap; } } /* XXX: add jpeg quantize code */ #define TRANSP_INDEX (6*6*6) /* this is maybe slow, but allows for extensions */ static inline unsigned char gif_clut_index (uint8_t r, uint8_t g, uint8_t b) { return ((((r) / 47) % 6) * 6 * 6 + (((g) / 47) % 6) * 6 + (((b) / 47) % 6)); } static void build_rgb_palette (uint8_t * palette, int has_alpha) { uint32_t *pal; static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff }; int i, r, g, b; pal = (uint32_t *) palette; i = 0; for (r = 0; r < 6; r++) { for (g = 0; g < 6; g++) { for (b = 0; b < 6; b++) { pal[i++] = (0xffU << 24) | (pal_value[r] << 16) | (pal_value[g] << 8) | pal_value[b]; } } } if (has_alpha) pal[i++] = 0; while (i < 256) pal[i++] = 0xff000000; } /* copy bit n to bits 0 ... n - 1 */ static inline unsigned int bitcopy_n (unsigned int a, int n) { int mask; mask = (1 << n) - 1; return (a & (0xff & ~mask)) | ((-((a >> n) & 1)) & mask); } /* rgb555 handling */ #define RGB_NAME rgb555 #define RGB_IN(r, g, b, s)\ {\ unsigned int v = ((const uint16_t *)(s))[0];\ r = bitcopy_n(v >> (10 - 3), 3);\ g = bitcopy_n(v >> (5 - 3), 3);\ b = bitcopy_n(v << 3, 3);\ } #define RGBA_IN(r, g, b, a, s)\ {\ unsigned int v = ((const uint16_t *)(s))[0];\ r = bitcopy_n(v >> (10 - 3), 3);\ g = bitcopy_n(v >> (5 - 3), 3);\ b = bitcopy_n(v << 3, 3);\ a = (-(v >> 15)) & 0xff;\ } #define RGBA_OUT(d, r, g, b, a)\ {\ ((uint16_t *)(d))[0] = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3) | \ ((a << 8) & 0x8000);\ } #define BPP 2 #include "imgconvert_template.h" /* rgb565 handling */ #define RGB_NAME rgb565 #define RGB_IN(r, g, b, s)\ {\ unsigned int v = ((const uint16_t *)(s))[0];\ r = bitcopy_n(v >> (11 - 3), 3);\ g = bitcopy_n(v >> (5 - 2), 2);\ b = bitcopy_n(v << 3, 3);\ } #define RGB_OUT(d, r, g, b)\ {\ ((uint16_t *)(d))[0] = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);\ } #define BPP 2 #include "imgconvert_template.h" /* bgr24 handling */ #define RGB_NAME bgr24 #define RGB_IN(r, g, b, s)\ {\ b = (s)[0];\ g = (s)[1];\ r = (s)[2];\ } #define RGB_OUT(d, r, g, b)\ {\ (d)[0] = b;\ (d)[1] = g;\ (d)[2] = r;\ } #define BPP 3 #include "imgconvert_template.h" #undef RGB_IN #undef RGB_OUT #undef BPP /* rgb24 handling */ #define RGB_NAME rgb24 #define FMT_RGB24 #define RGB_IN(r, g, b, s)\ {\ r = (s)[0];\ g = (s)[1];\ b = (s)[2];\ } #define RGB_OUT(d, r, g, b)\ {\ (d)[0] = r;\ (d)[1] = g;\ (d)[2] = b;\ } #define BPP 3 #include "imgconvert_template.h" /* rgba32 handling */ #define RGB_NAME rgba32 #define FMT_RGBA32 #define RGB_IN(r, g, b, s)\ {\ unsigned int v = ((const uint32_t *)(s))[0];\ r = (v >> 16) & 0xff;\ g = (v >> 8) & 0xff;\ b = v & 0xff;\ } #define RGBA_IN(r, g, b, a, s)\ {\ unsigned int v = ((const uint32_t *)(s))[0];\ a = (v >> 24) & 0xff;\ r = (v >> 16) & 0xff;\ g = (v >> 8) & 0xff;\ b = v & 0xff;\ } #define RGBA_OUT(d, r, g, b, a)\ {\ ((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;\ } #define BPP 4 #include "imgconvert_template.h" static void mono_to_gray (AVPicture * dst, const AVPicture * src, int width, int height, int xor_mask) { const unsigned char *p; unsigned char *q; int v, dst_wrap, src_wrap; int y, w; p = src->data[0]; src_wrap = src->linesize[0] - ((width + 7) >> 3); q = dst->data[0]; dst_wrap = dst->linesize[0] - width; for (y = 0; y < height; y++) { w = width; while (w >= 8) { v = *p++ ^ xor_mask; q[0] = -(v >> 7); q[1] = -((v >> 6) & 1); q[2] = -((v >> 5) & 1); q[3] = -((v >> 4) & 1); q[4] = -((v >> 3) & 1); q[5] = -((v >> 2) & 1); q[6] = -((v >> 1) & 1); q[7] = -((v >> 0) & 1); w -= 8; q += 8; } if (w > 0) { v = *p++ ^ xor_mask; do { q[0] = -((v >> 7) & 1); q++; v <<= 1; } while (--w); } p += src_wrap; q += dst_wrap; } } static void monowhite_to_gray (AVPicture * dst, const AVPicture * src, int width, int height) { mono_to_gray (dst, src, width, height, 0xff); } static void monoblack_to_gray (AVPicture * dst, const AVPicture * src, int width, int height) { mono_to_gray (dst, src, width, height, 0x00); } static void gray_to_mono (AVPicture * dst, const AVPicture * src, int width, int height, int xor_mask) { int n; const uint8_t *s; uint8_t *d; int j, b, v, n1, src_wrap, dst_wrap, y; s = src->data[0]; src_wrap = src->linesize[0] - width; d = dst->data[0]; dst_wrap = dst->linesize[0] - ((width + 7) >> 3); for (y = 0; y < height; y++) { n = width; while (n >= 8) { v = 0; for (j = 0; j < 8; j++) { b = s[0]; s++; v = (v << 1) | (b >> 7); } d[0] = v ^ xor_mask; d++; n -= 8; } if (n > 0) { n1 = n; v = 0; while (n > 0) { b = s[0]; s++; v = (v << 1) | (b >> 7); n--; } d[0] = (v << (8 - (n1 & 7))) ^ xor_mask; d++; } s += src_wrap; d += dst_wrap; } } static void gray_to_monowhite (AVPicture * dst, const AVPicture * src, int width, int height) { gray_to_mono (dst, src, width, height, 0xff); } static void gray_to_monoblack (AVPicture * dst, const AVPicture * src, int width, int height) { gray_to_mono (dst, src, width, height, 0x00); } typedef void (*convert_func) (AVPicture * dst, const AVPicture * src, int width, int height); typedef struct ConvertEntry { int from; int to; convert_func convert; } ConvertEntry; /* Add each new convertion function in this table. In order to be able to convert from any format to any format, the following constraints must be satisfied: - all FF_COLOR_RGB formats must convert to and from PIX_FMT_RGB24 - all FF_COLOR_GRAY formats must convert to and from PIX_FMT_GRAY8 - all FF_COLOR_RGB formats with alpha must convert to and from PIX_FMT_RGBA32 - PIX_FMT_YUV444P and PIX_FMT_YUVJ444P must convert to and from PIX_FMT_RGB24. - PIX_FMT_422 must convert to and from PIX_FMT_422P. The other conversion functions are just optimisations for common cases. */ static ConvertEntry convert_table[] = { {PIX_FMT_YUV420P, PIX_FMT_RGB24, yuv420p_to_rgb24}, {PIX_FMT_YUV420P, PIX_FMT_BGR24, yuv420p_to_bgr24}, {PIX_FMT_YUV420P, PIX_FMT_RGBA32, yuv420p_to_rgba32}, {PIX_FMT_YUV420P, PIX_FMT_RGB565, yuv420p_to_rgb565}, {PIX_FMT_YUV420P, PIX_FMT_RGB555, yuv420p_to_rgb555}, {PIX_FMT_YUV422P, PIX_FMT_YUV422, yuv422p_to_yuv422}, {PIX_FMT_YUV444P, PIX_FMT_RGB24, yuv444p_to_rgb24}, {PIX_FMT_YUV422, PIX_FMT_YUV420P, yuv422_to_yuv420p}, {PIX_FMT_YUV422, PIX_FMT_YUV422P, yuv422_to_yuv422p}, {PIX_FMT_YUVJ420P, PIX_FMT_RGB555, yuvj420p_to_rgb555}, {PIX_FMT_YUVJ420P, PIX_FMT_RGB565, yuvj420p_to_rgb565}, {PIX_FMT_YUVJ420P, PIX_FMT_BGR24, yuvj420p_to_bgr24}, {PIX_FMT_YUVJ420P, PIX_FMT_RGB24, yuvj420p_to_rgb24}, {PIX_FMT_YUVJ420P, PIX_FMT_RGBA32, yuvj420p_to_rgba32}, {PIX_FMT_YUVJ444P, PIX_FMT_RGB24, yuvj444p_to_rgb24}, {PIX_FMT_RGB24, PIX_FMT_YUV420P, rgb24_to_yuv420p}, {PIX_FMT_RGB24, PIX_FMT_RGB565, rgb24_to_rgb565}, {PIX_FMT_RGB24, PIX_FMT_RGB555, rgb24_to_rgb555}, {PIX_FMT_RGB24, PIX_FMT_RGBA32, rgb24_to_rgba32}, {PIX_FMT_RGB24, PIX_FMT_BGR24, rgb24_to_bgr24}, {PIX_FMT_RGB24, PIX_FMT_GRAY8, rgb24_to_gray}, {PIX_FMT_RGB24, PIX_FMT_PAL8, rgb24_to_pal8}, {PIX_FMT_RGB24, PIX_FMT_YUV444P, rgb24_to_yuv444p}, {PIX_FMT_RGB24, PIX_FMT_YUVJ420P, rgb24_to_yuvj420p}, {PIX_FMT_RGB24, PIX_FMT_YUVJ444P, rgb24_to_yuvj444p}, {PIX_FMT_RGBA32, PIX_FMT_RGB24, rgba32_to_rgb24}, {PIX_FMT_RGBA32, PIX_FMT_RGB555, rgba32_to_rgb555}, {PIX_FMT_RGBA32, PIX_FMT_PAL8, rgba32_to_pal8}, {PIX_FMT_RGBA32, PIX_FMT_YUV420P, rgba32_to_yuv420p}, {PIX_FMT_RGBA32, PIX_FMT_GRAY8, rgba32_to_gray}, {PIX_FMT_BGR24, PIX_FMT_RGB24, bgr24_to_rgb24}, {PIX_FMT_BGR24, PIX_FMT_YUV420P, bgr24_to_yuv420p}, {PIX_FMT_BGR24, PIX_FMT_GRAY8, bgr24_to_gray}, {PIX_FMT_RGB555, PIX_FMT_RGB24, rgb555_to_rgb24}, {PIX_FMT_RGB555, PIX_FMT_RGBA32, rgb555_to_rgba32}, {PIX_FMT_RGB555, PIX_FMT_YUV420P, rgb555_to_yuv420p}, {PIX_FMT_RGB555, PIX_FMT_GRAY8, rgb555_to_gray}, {PIX_FMT_RGB565, PIX_FMT_RGB24, rgb565_to_rgb24}, {PIX_FMT_RGB565, PIX_FMT_YUV420P, rgb565_to_yuv420p}, {PIX_FMT_RGB565, PIX_FMT_GRAY8, rgb565_to_gray}, {PIX_FMT_GRAY8, PIX_FMT_RGB555, gray_to_rgb555}, {PIX_FMT_GRAY8, PIX_FMT_RGB565, gray_to_rgb565}, {PIX_FMT_GRAY8, PIX_FMT_RGB24, gray_to_rgb24}, {PIX_FMT_GRAY8, PIX_FMT_BGR24, gray_to_bgr24}, {PIX_FMT_GRAY8, PIX_FMT_RGBA32, gray_to_rgba32}, {PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, gray_to_monowhite}, {PIX_FMT_GRAY8, PIX_FMT_MONOBLACK, gray_to_monoblack}, {PIX_FMT_MONOWHITE, PIX_FMT_GRAY8, monowhite_to_gray}, {PIX_FMT_MONOBLACK, PIX_FMT_GRAY8, monoblack_to_gray}, {PIX_FMT_PAL8, PIX_FMT_RGB555, pal8_to_rgb555}, {PIX_FMT_PAL8, PIX_FMT_RGB565, pal8_to_rgb565}, {PIX_FMT_PAL8, PIX_FMT_BGR24, pal8_to_bgr24}, {PIX_FMT_PAL8, PIX_FMT_RGB24, pal8_to_rgb24}, {PIX_FMT_PAL8, PIX_FMT_RGBA32, pal8_to_rgba32}, }; static convert_func convert_table_lookup (int src_pix_fmt, int dst_pix_fmt) { int i; for (i = 0; i < sizeof (convert_table) / sizeof (convert_table[0]); i++) { if (convert_table[i].from == src_pix_fmt && convert_table[i].to == dst_pix_fmt) { return convert_table[i].convert; } } return NULL; } int avpicture_alloc (AVPicture * picture, int pix_fmt, int width, int height) { unsigned int size; void *ptr; size = avpicture_get_size (pix_fmt, width, height); ptr = av_malloc (size); if (!ptr) goto fail; avpicture_fill (picture, ptr, pix_fmt, width, height); return 0; fail: memset (picture, 0, sizeof (AVPicture)); return -1; } void avpicture_free (AVPicture * picture) { av_free (picture->data[0]); } /* return true if yuv planar */ static inline int is_yuv_planar (PixFmtInfo * ps) { return (ps->color_type == FF_COLOR_YUV || ps->color_type == FF_COLOR_YUV_JPEG) && ps->pixel_type == FF_PIXEL_PLANAR; } /* XXX: always use linesize. Return -1 if not supported */ int img_convert (AVPicture * dst, int dst_pix_fmt, const AVPicture * src, int src_pix_fmt, int src_width, int src_height) { static int inited; int i, ret, dst_width, dst_height, int_pix_fmt; PixFmtInfo *src_pix, *dst_pix; convert_func convert; AVPicture tmp1, *tmp = &tmp1; if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB || dst_pix_fmt < 0 || dst_pix_fmt >= PIX_FMT_NB) return -1; if (src_width <= 0 || src_height <= 0) return 0; if (!inited) { inited = 1; img_convert_init (); } dst_width = src_width; dst_height = src_height; dst_pix = &pix_fmt_info[dst_pix_fmt]; src_pix = &pix_fmt_info[src_pix_fmt]; if (src_pix_fmt == dst_pix_fmt) { /* no conversion needed: just copy */ img_copy (dst, src, dst_pix_fmt, dst_width, dst_height); return 0; } convert = convert_table_lookup (src_pix_fmt, dst_pix_fmt); if (convert) { /* specific convertion routine */ convert (dst, src, dst_width, dst_height); return 0; } /* gray to YUV */ if (is_yuv_planar (dst_pix) && src_pix_fmt == PIX_FMT_GRAY8) { int w, h, y; uint8_t *d; if (dst_pix->color_type == FF_COLOR_YUV_JPEG) { img_copy_plane (dst->data[0], dst->linesize[0], src->data[0], src->linesize[0], dst_width, dst_height); } else { img_apply_table (dst->data[0], dst->linesize[0], src->data[0], src->linesize[0], dst_width, dst_height, y_jpeg_to_ccir); } /* fill U and V with 128 */ w = dst_width; h = dst_height; w >>= dst_pix->x_chroma_shift; h >>= dst_pix->y_chroma_shift; for (i = 1; i <= 2; i++) { d = dst->data[i]; for (y = 0; y < h; y++) { memset (d, 128, w); d += dst->linesize[i]; } } return 0; } /* YUV to gray */ if (is_yuv_planar (src_pix) && dst_pix_fmt == PIX_FMT_GRAY8) { if (src_pix->color_type == FF_COLOR_YUV_JPEG) { img_copy_plane (dst->data[0], dst->linesize[0], src->data[0], src->linesize[0], dst_width, dst_height); } else { img_apply_table (dst->data[0], dst->linesize[0], src->data[0], src->linesize[0], dst_width, dst_height, y_ccir_to_jpeg); } return 0; } /* YUV to YUV planar */ if (is_yuv_planar (dst_pix) && is_yuv_planar (src_pix)) { int x_shift, y_shift, w, h, xy_shift; void (*resize_func) (uint8_t * dst, int dst_wrap, const uint8_t * src, int src_wrap, int width, int height); /* compute chroma size of the smallest dimensions */ w = dst_width; h = dst_height; if (dst_pix->x_chroma_shift >= src_pix->x_chroma_shift) w >>= dst_pix->x_chroma_shift; else w >>= src_pix->x_chroma_shift; if (dst_pix->y_chroma_shift >= src_pix->y_chroma_shift) h >>= dst_pix->y_chroma_shift; else h >>= src_pix->y_chroma_shift; x_shift = (dst_pix->x_chroma_shift - src_pix->x_chroma_shift); y_shift = (dst_pix->y_chroma_shift - src_pix->y_chroma_shift); xy_shift = ((x_shift & 0xf) << 4) | (y_shift & 0xf); /* there must be filters for conversion at least from and to YUV444 format */ switch (xy_shift) { case 0x00: resize_func = img_copy_plane; break; case 0x10: resize_func = shrink21; break; case 0x20: resize_func = shrink41; break; case 0x01: resize_func = shrink12; break; case 0x11: resize_func = shrink22; break; case 0x22: resize_func = shrink44; break; case 0xf0: resize_func = grow21; break; case 0xe0: resize_func = grow41; break; case 0xff: resize_func = grow22; break; case 0xee: resize_func = grow44; break; case 0xf1: resize_func = conv411; break; default: /* currently not handled */ goto no_chroma_filter; } img_copy_plane (dst->data[0], dst->linesize[0], src->data[0], src->linesize[0], dst_width, dst_height); for (i = 1; i <= 2; i++) resize_func (dst->data[i], dst->linesize[i], src->data[i], src->linesize[i], dst_width >> dst_pix->x_chroma_shift, dst_height >> dst_pix->y_chroma_shift); /* if yuv color space conversion is needed, we do it here on the destination image */ if (dst_pix->color_type != src_pix->color_type) { const uint8_t *y_table, *c_table; if (dst_pix->color_type == FF_COLOR_YUV) { y_table = y_jpeg_to_ccir; c_table = c_jpeg_to_ccir; } else { y_table = y_ccir_to_jpeg; c_table = c_ccir_to_jpeg; } img_apply_table (dst->data[0], dst->linesize[0], dst->data[0], dst->linesize[0], dst_width, dst_height, y_table); for (i = 1; i <= 2; i++) img_apply_table (dst->data[i], dst->linesize[i], dst->data[i], dst->linesize[i], dst_width >> dst_pix->x_chroma_shift, dst_height >> dst_pix->y_chroma_shift, c_table); } return 0; } no_chroma_filter: /* try to use an intermediate format */ if (src_pix_fmt == PIX_FMT_YUV422 || dst_pix_fmt == PIX_FMT_YUV422) { /* specific case: convert to YUV422P first */ int_pix_fmt = PIX_FMT_YUV422P; } else if ((src_pix->color_type == FF_COLOR_GRAY && src_pix_fmt != PIX_FMT_GRAY8) || (dst_pix->color_type == FF_COLOR_GRAY && dst_pix_fmt != PIX_FMT_GRAY8)) { /* gray8 is the normalized format */ int_pix_fmt = PIX_FMT_GRAY8; } else if ((is_yuv_planar (src_pix) && src_pix_fmt != PIX_FMT_YUV444P && src_pix_fmt != PIX_FMT_YUVJ444P)) { /* yuv444 is the normalized format */ if (src_pix->color_type == FF_COLOR_YUV_JPEG) int_pix_fmt = PIX_FMT_YUVJ444P; else int_pix_fmt = PIX_FMT_YUV444P; } else if ((is_yuv_planar (dst_pix) && dst_pix_fmt != PIX_FMT_YUV444P && dst_pix_fmt != PIX_FMT_YUVJ444P)) { /* yuv444 is the normalized format */ if (dst_pix->color_type == FF_COLOR_YUV_JPEG) int_pix_fmt = PIX_FMT_YUVJ444P; else int_pix_fmt = PIX_FMT_YUV444P; } else { /* the two formats are rgb or gray8 or yuv[j]444p */ if (src_pix->is_alpha && dst_pix->is_alpha) int_pix_fmt = PIX_FMT_RGBA32; else int_pix_fmt = PIX_FMT_RGB24; } if (avpicture_alloc (tmp, int_pix_fmt, dst_width, dst_height) < 0) return -1; ret = -1; if (img_convert (tmp, int_pix_fmt, src, src_pix_fmt, src_width, src_height) < 0) goto fail1; if (img_convert (dst, dst_pix_fmt, tmp, int_pix_fmt, dst_width, dst_height) < 0) goto fail1; ret = 0; fail1: avpicture_free (tmp); return ret; } /* 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 < height; y++) { for (x = 0; x < width; x++) { a = palette[p[0]] >> 24; if (a == 0x00) { ret |= FF_ALPHA_TRANSP; } else if (a != 0xff) { ret |= FF_ALPHA_SEMI_TRANSP; } p++; } p += src_wrap; } return ret; } /** * Tell if an image really has transparent alpha values. * @return ored mask of FF_ALPHA_xxx constants */ int img_get_alpha_info (const AVPicture * src, int pix_fmt, int width, int height) { PixFmtInfo *pf = &pix_fmt_info[pix_fmt]; int ret; pf = &pix_fmt_info[pix_fmt]; /* no alpha can be represented in format */ if (!pf->is_alpha) return 0; switch (pix_fmt) { case PIX_FMT_RGBA32: ret = get_alpha_info_rgba32 (src, width, height); break; case PIX_FMT_RGB555: ret = get_alpha_info_rgb555 (src, width, height); break; 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; } #ifdef HAVE_MMX #define DEINT_INPLACE_LINE_LUM \ movd_m2r(lum_m4[0],mm0);\ movd_m2r(lum_m3[0],mm1);\ movd_m2r(lum_m2[0],mm2);\ movd_m2r(lum_m1[0],mm3);\ movd_m2r(lum[0],mm4);\ punpcklbw_r2r(mm7,mm0);\ movd_r2m(mm2,lum_m4[0]);\ punpcklbw_r2r(mm7,mm1);\ punpcklbw_r2r(mm7,mm2);\ punpcklbw_r2r(mm7,mm3);\ punpcklbw_r2r(mm7,mm4);\ paddw_r2r(mm3,mm1);\ psllw_i2r(1,mm2);\ paddw_r2r(mm4,mm0);\ psllw_i2r(2,mm1);\ paddw_r2r(mm6,mm2);\ paddw_r2r(mm2,mm1);\ psubusw_r2r(mm0,mm1);\ psrlw_i2r(3,mm1);\ packuswb_r2r(mm7,mm1);\ movd_r2m(mm1,lum_m2[0]); #define DEINT_LINE_LUM \ movd_m2r(lum_m4[0],mm0);\ movd_m2r(lum_m3[0],mm1);\ movd_m2r(lum_m2[0],mm2);\ movd_m2r(lum_m1[0],mm3);\ movd_m2r(lum[0],mm4);\ punpcklbw_r2r(mm7,mm0);\ punpcklbw_r2r(mm7,mm1);\ punpcklbw_r2r(mm7,mm2);\ punpcklbw_r2r(mm7,mm3);\ punpcklbw_r2r(mm7,mm4);\ paddw_r2r(mm3,mm1);\ psllw_i2r(1,mm2);\ paddw_r2r(mm4,mm0);\ psllw_i2r(2,mm1);\ paddw_r2r(mm6,mm2);\ paddw_r2r(mm2,mm1);\ psubusw_r2r(mm0,mm1);\ psrlw_i2r(3,mm1);\ packuswb_r2r(mm7,mm1);\ movd_r2m(mm1,dst[0]); #endif /* filter parameters: [-1 4 2 4 -1] // 8 */ static void deinterlace_line (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) { #ifndef HAVE_MMX uint8_t *cm = 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++; } #else { mmx_t rounder; rounder.uw[0] = 4; rounder.uw[1] = 4; rounder.uw[2] = 4; rounder.uw[3] = 4; pxor_r2r (mm7, mm7); movq_m2r (rounder, mm6); } for (; size > 3; size -= 4) { DEINT_LINE_LUM lum_m4 += 4; lum_m3 += 4; lum_m2 += 4; lum_m1 += 4; lum += 4; dst += 4; } #endif } static void deinterlace_line_inplace (uint8_t * lum_m4, uint8_t * lum_m3, uint8_t * lum_m2, uint8_t * lum_m1, uint8_t * lum, int size) { #ifndef HAVE_MMX uint8_t *cm = 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++; } #else { mmx_t rounder; rounder.uw[0] = 4; rounder.uw[1] = 4; rounder.uw[2] = 4; rounder.uw[3] = 4; pxor_r2r (mm7, mm7); movq_m2r (rounder, mm6); } for (; size > 3; size -= 4) { DEINT_INPLACE_LINE_LUM lum_m4 += 4; lum_m3 += 4; lum_m2 += 4; lum_m1 += 4; lum += 4; } #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); } /* deinterlace - if not supported return -1 */ int avpicture_deinterlace (AVPicture * dst, const AVPicture * src, int pix_fmt, int width, int height) { int i; if (pix_fmt != PIX_FMT_YUV420P && pix_fmt != PIX_FMT_YUV422P && pix_fmt != PIX_FMT_YUV444P && pix_fmt != PIX_FMT_YUV411P) 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_YUV420P: width >>= 1; height >>= 1; break; case PIX_FMT_YUV422P: width >>= 1; break; case PIX_FMT_YUV411P: width >>= 2; break; default: 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); } } #ifdef HAVE_MMX emms (); #endif return 0; } #undef FIX