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FFmpeg/libavcodec/imgconvert.c

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  1. /*

  2.  * Misc image convertion routines

  3.  * Copyright (c) 2001, 2002, 2003 Fabrice Bellard.

  4.  *

  5.  * This library is free software; you can redistribute it and/or

  6.  * modify it under the terms of the GNU Lesser General Public

  7.  * License as published by the Free Software Foundation; either

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

  11.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  12.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  13.  * Lesser General Public License for more details.

  14.  *

  15.  * You should have received a copy of the GNU Lesser General Public

  16.  * License along with this library; if not, write to the Free Software

  17.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  18.  */

  19. 

  20. /**

  21.  * @file imgconvert.c

  22.  * Misc image convertion routines.

  23.  */

  24. 

  25. /* TODO:

  26.  * - write 'ffimg' program to test all the image related stuff

  27.  * - move all api to slice based system

  28.  * - integrate deinterlacing, postprocessing and scaling in the conversion process

  29.  */

  30. 

  31. #include "avcodec.h"

  32. #include "dsputil.h"

  33. 

  34. #ifdef USE_FASTMEMCPY

  35. #include "fastmemcpy.h"

  36. #endif

  37. 

  38. #ifdef HAVE_MMX

  39. #include "i386/mmx.h"

  40. #endif

  41. 

  42. #define xglue(x, y) x ## y

  43. #define glue(x, y) xglue(x, y)

  44. 

  45. #define FF_COLOR_RGB      0 /* RGB color space */

  46. #define FF_COLOR_GRAY     1 /* gray color space */

  47. #define FF_COLOR_YUV      2 /* YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */

  48. #define FF_COLOR_YUV_JPEG 3 /* YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */

  49. 

  50. #define FF_PIXEL_PLANAR   0 /* each channel has one component in AVPicture */

  51. #define FF_PIXEL_PACKED   1 /* only one components containing all the channels */

  52. #define FF_PIXEL_PALETTE  2  /* one components containing indexes for a palette */

  53. 

  54. typedef struct PixFmtInfo {

  55.     const char *name;

  56.     uint8_t nb_channels;     /* number of channels (including alpha) */

  57.     uint8_t color_type;      /* color type (see FF_COLOR_xxx constants) */

  58.     uint8_t pixel_type;      /* pixel storage type (see FF_PIXEL_xxx constants) */

  59.     uint8_t is_alpha : 1;    /* true if alpha can be specified */

  60.     uint8_t x_chroma_shift;  /* X chroma subsampling factor is 2 ^ shift */

  61.     uint8_t y_chroma_shift;  /* Y chroma subsampling factor is 2 ^ shift */

  62.     uint8_t depth;           /* bit depth of the color components */

  63. } PixFmtInfo;

  64. 

  65. /* this table gives more information about formats */

  66. static PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {

  67.     /* YUV formats */

  68.     [PIX_FMT_YUV420P] = {

  69.         .name = "yuv420p",

  70.         .nb_channels = 3,

  71.         .color_type = FF_COLOR_YUV,

  72.         .pixel_type = FF_PIXEL_PLANAR,

  73.         .depth = 8,

  74.         .x_chroma_shift = 1, .y_chroma_shift = 1, 

  75.     },

  76.     [PIX_FMT_YUV422P] = {

  77.         .name = "yuv422p",

  78.         .nb_channels = 3,

  79.         .color_type = FF_COLOR_YUV,

  80.         .pixel_type = FF_PIXEL_PLANAR,

  81.         .depth = 8,

  82.         .x_chroma_shift = 1, .y_chroma_shift = 0, 

  83.     },

  84.     [PIX_FMT_YUV444P] = {

  85.         .name = "yuv444p",

  86.         .nb_channels = 3,

  87.         .color_type = FF_COLOR_YUV,

  88.         .pixel_type = FF_PIXEL_PLANAR,

  89.         .depth = 8,

  90.         .x_chroma_shift = 0, .y_chroma_shift = 0, 

  91.     },

  92.     [PIX_FMT_YUV422] = {

  93.         .name = "yuv422",

  94.         .nb_channels = 1,

  95.         .color_type = FF_COLOR_YUV,

  96.         .pixel_type = FF_PIXEL_PACKED,

  97.         .depth = 8,

  98.         .x_chroma_shift = 1, .y_chroma_shift = 0,

  99.     },

  100.     [PIX_FMT_YUV410P] = {

  101.         .name = "yuv410p",

  102.         .nb_channels = 3,

  103.         .color_type = FF_COLOR_YUV,

  104.         .pixel_type = FF_PIXEL_PLANAR,

  105.         .depth = 8,

  106.         .x_chroma_shift = 2, .y_chroma_shift = 2,

  107.     },

  108.     [PIX_FMT_YUV411P] = {

  109.         .name = "yuv411p",

  110.         .nb_channels = 3,

  111.         .color_type = FF_COLOR_YUV,

  112.         .pixel_type = FF_PIXEL_PLANAR,

  113.         .depth = 8,

  114.         .x_chroma_shift = 2, .y_chroma_shift = 0,

  115.     },

  116. 

  117.     /* JPEG YUV */

  118.     [PIX_FMT_YUVJ420P] = {

  119.         .name = "yuvj420p",

  120.         .nb_channels = 3,

  121.         .color_type = FF_COLOR_YUV_JPEG,

  122.         .pixel_type = FF_PIXEL_PLANAR,

  123.         .depth = 8,

  124.         .x_chroma_shift = 1, .y_chroma_shift = 1, 

  125.     },

  126.     [PIX_FMT_YUVJ422P] = {

  127.         .name = "yuvj422p",

  128.         .nb_channels = 3,

  129.         .color_type = FF_COLOR_YUV_JPEG,

  130.         .pixel_type = FF_PIXEL_PLANAR,

  131.         .depth = 8,

  132.         .x_chroma_shift = 1, .y_chroma_shift = 0, 

  133.     },

  134.     [PIX_FMT_YUVJ444P] = {

  135.         .name = "yuvj444p",

  136.         .nb_channels = 3,

  137.         .color_type = FF_COLOR_YUV_JPEG,

  138.         .pixel_type = FF_PIXEL_PLANAR,

  139.         .depth = 8,

  140.         .x_chroma_shift = 0, .y_chroma_shift = 0, 

  141.     },

  142. 

  143.     /* RGB formats */

  144.     [PIX_FMT_RGB24] = {

  145.         .name = "rgb24",

  146.         .nb_channels = 3,

  147.         .color_type = FF_COLOR_RGB,

  148.         .pixel_type = FF_PIXEL_PACKED,

  149.         .depth = 8,

  150.     },

  151.     [PIX_FMT_BGR24] = {

  152.         .name = "bgr24",

  153.         .nb_channels = 3,

  154.         .color_type = FF_COLOR_RGB,

  155.         .pixel_type = FF_PIXEL_PACKED,

  156.         .depth = 8,

  157.     },

  158.     [PIX_FMT_RGBA32] = {

  159.         .name = "rgba32",

  160.         .nb_channels = 4, .is_alpha = 1,

  161.         .color_type = FF_COLOR_RGB,

  162.         .pixel_type = FF_PIXEL_PACKED,

  163.         .depth = 8,

  164.     },

  165.     [PIX_FMT_RGB565] = {

  166.         .name = "rgb565",

  167.         .nb_channels = 3,

  168.         .color_type = FF_COLOR_RGB,

  169.         .pixel_type = FF_PIXEL_PACKED,

  170.         .depth = 5,

  171.     },

  172.     [PIX_FMT_RGB555] = {

  173.         .name = "rgb555",

  174.         .nb_channels = 4, .is_alpha = 1,

  175.         .color_type = FF_COLOR_RGB,

  176.         .pixel_type = FF_PIXEL_PACKED,

  177.         .depth = 5,

  178.     },

  179. 

  180.     /* gray / mono formats */

  181.     [PIX_FMT_GRAY8] = {

  182.         .name = "gray",

  183.         .nb_channels = 1,

  184.         .color_type = FF_COLOR_GRAY,

  185.         .pixel_type = FF_PIXEL_PLANAR,

  186.         .depth = 8,

  187.     },

  188.     [PIX_FMT_MONOWHITE] = {

  189.         .name = "monow",

  190.         .nb_channels = 1,

  191.         .color_type = FF_COLOR_GRAY,

  192.         .pixel_type = FF_PIXEL_PLANAR,

  193.         .depth = 1,

  194.     },

  195.     [PIX_FMT_MONOBLACK] = {

  196.         .name = "monob",

  197.         .nb_channels = 1,

  198.         .color_type = FF_COLOR_GRAY,

  199.         .pixel_type = FF_PIXEL_PLANAR,

  200.         .depth = 1,

  201.     },

  202. 

  203.     /* paletted formats */

  204.     [PIX_FMT_PAL8] = {

  205.         .name = "pal8",

  206.         .nb_channels = 4, .is_alpha = 1,

  207.         .color_type = FF_COLOR_RGB,

  208.         .pixel_type = FF_PIXEL_PALETTE,

  209.         .depth = 8,

  210.     },

  211. };

  212. 

  213. void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift)

  214. {

  215.     *h_shift = pix_fmt_info[pix_fmt].x_chroma_shift;

  216.     *v_shift = pix_fmt_info[pix_fmt].y_chroma_shift;

  217. }

  218. 

  219. const char *avcodec_get_pix_fmt_name(int pix_fmt)

  220. {

  221.     if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)

  222.         return "???";

  223.     else

  224.         return pix_fmt_info[pix_fmt].name;

  225. }

  226. 

  227. enum PixelFormat avcodec_get_pix_fmt(const char* name)

  228. {

  229.     int i; 

  230.     

  231.     for (i=0; i < PIX_FMT_NB; i++)

  232.          if (!strcmp(pix_fmt_info[i].name, name))

  233. 	     break;

  234.     return i;

  235. }

  236. 

  237. /* Picture field are filled with 'ptr' addresses. Also return size */

  238. int avpicture_fill(AVPicture *picture, uint8_t *ptr,

  239.                    int pix_fmt, int width, int height)

  240. {

  241.     int size, w2, h2, size2;

  242.     PixFmtInfo *pinfo;

  243.     

  244.     pinfo = &pix_fmt_info[pix_fmt];

  245.     size = width * height;

  246.     switch(pix_fmt) {

  247.     case PIX_FMT_YUV420P:

  248.     case PIX_FMT_YUV422P:

  249.     case PIX_FMT_YUV444P:

  250.     case PIX_FMT_YUV410P:

  251.     case PIX_FMT_YUV411P:

  252.     case PIX_FMT_YUVJ420P:

  253.     case PIX_FMT_YUVJ422P:

  254.     case PIX_FMT_YUVJ444P:

  255.         w2 = (width + (1 << pinfo->x_chroma_shift) - 1) >> pinfo->x_chroma_shift;

  256.         h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;

  257.         size2 = w2 * h2;

  258.         picture->data[0] = ptr;

  259.         picture->data[1] = picture->data[0] + size;

  260.         picture->data[2] = picture->data[1] + size2;

  261.         picture->linesize[0] = width;

  262.         picture->linesize[1] = w2;

  263.         picture->linesize[2] = w2;

  264.         return size + 2 * size2;

  265.     case PIX_FMT_RGB24:

  266.     case PIX_FMT_BGR24:

  267.         picture->data[0] = ptr;

  268.         picture->data[1] = NULL;

  269.         picture->data[2] = NULL;

  270.         picture->linesize[0] = width * 3;

  271.         return size * 3;

  272.     case PIX_FMT_RGBA32:

  273.         picture->data[0] = ptr;

  274.         picture->data[1] = NULL;

  275.         picture->data[2] = NULL;

  276.         picture->linesize[0] = width * 4;

  277.         return size * 4;

  278.     case PIX_FMT_RGB555:

  279.     case PIX_FMT_RGB565:

  280.     case PIX_FMT_YUV422:

  281.         picture->data[0] = ptr;

  282.         picture->data[1] = NULL;

  283.         picture->data[2] = NULL;

  284.         picture->linesize[0] = width * 2;

  285.         return size * 2;

  286.     case PIX_FMT_GRAY8:

  287.         picture->data[0] = ptr;

  288.         picture->data[1] = NULL;

  289.         picture->data[2] = NULL;

  290.         picture->linesize[0] = width;

  291.         return size;

  292.     case PIX_FMT_MONOWHITE:

  293.     case PIX_FMT_MONOBLACK:

  294.         picture->data[0] = ptr;

  295.         picture->data[1] = NULL;

  296.         picture->data[2] = NULL;

  297.         picture->linesize[0] = (width + 7) >> 3;

  298.         return picture->linesize[0] * height;

  299.     case PIX_FMT_PAL8:

  300.         size2 = (size + 3) & ~3;

  301.         picture->data[0] = ptr;

  302.         picture->data[1] = ptr + size2; /* palette is stored here as 256 32 bit words */

  303.         picture->data[2] = NULL;

  304.         picture->linesize[0] = width;

  305.         picture->linesize[1] = 4;

  306.         return size2 + 256 * 4;

  307.     default:

  308.         picture->data[0] = NULL;

  309.         picture->data[1] = NULL;

  310.         picture->data[2] = NULL;

  311.         picture->data[3] = NULL;

  312.         return -1;

  313.     }

  314. }

  315. 

  316. int avpicture_layout(AVPicture* src, int pix_fmt, int width, int height,

  317.                      unsigned char *dest, int dest_size)

  318. {

  319.     PixFmtInfo* pf = &pix_fmt_info[pix_fmt];

  320.     int i, j, w, h, data_planes;

  321.     unsigned char* s; 

  322.     int size = avpicture_get_size(pix_fmt, width, height);

  323. 

  324.     if (size > dest_size)

  325.         return -1;

  326. 

  327.     if (pf->pixel_type == FF_PIXEL_PACKED) {

  328.         if (pix_fmt == PIX_FMT_YUV422 || pix_fmt == PIX_FMT_RGB565 ||

  329. 	    pix_fmt == PIX_FMT_RGB555)

  330. 	  w = width * 2;

  331. 	else

  332. 	  w = width * (pf->depth * pf->nb_channels / 8);

  333. 	data_planes = 1;

  334. 	h = height;

  335.     } else {

  336.         data_planes = pf->nb_channels;

  337. 	w = width;

  338. 	h = height;

  339.     }

  340.     

  341.     for (i=0; i<data_planes; i++) {

  342.          if (i == 1) {

  343. 	     w = width >> pf->x_chroma_shift;

  344. 	     h = height >> pf->y_chroma_shift;

  345. 	 }

  346.          s = src->data[i];

  347. 	 for(j=0; j<h; j++) {

  348. 	     memcpy(dest, s, w);

  349. 	     dest += w;

  350. 	     s += src->linesize[i];

  351. 	 }

  352.     }

  353. 

  354.     return size;

  355. }

  356. 

  357. int avpicture_get_size(int pix_fmt, int width, int height)

  358. {

  359.     AVPicture dummy_pict;

  360.     return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);

  361. }

  362. 

  363. /**

  364.  * compute the loss when converting from a pixel format to another 

  365.  */

  366. int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,

  367.                              int has_alpha)

  368. {

  369.     const PixFmtInfo *pf, *ps;

  370.     int loss;

  371. 

  372.     ps = &pix_fmt_info[src_pix_fmt];

  373.     pf = &pix_fmt_info[dst_pix_fmt];

  374. 

  375.     /* compute loss */

  376.     loss = 0;

  377.     pf = &pix_fmt_info[dst_pix_fmt];

  378.     if (pf->depth < ps->depth ||

  379.         (dst_pix_fmt == PIX_FMT_RGB555 && src_pix_fmt == PIX_FMT_RGB565))

  380.         loss |= FF_LOSS_DEPTH;

  381.     if (pf->x_chroma_shift > ps->x_chroma_shift ||

  382.         pf->y_chroma_shift > ps->y_chroma_shift)

  383.         loss |= FF_LOSS_RESOLUTION;

  384.     switch(pf->color_type) {

  385.     case FF_COLOR_RGB:

  386.         if (ps->color_type != FF_COLOR_RGB &&

  387.             ps->color_type != FF_COLOR_GRAY)

  388.             loss |= FF_LOSS_COLORSPACE;

  389.         break;

  390.     case FF_COLOR_GRAY:

  391.         if (ps->color_type != FF_COLOR_GRAY)

  392.             loss |= FF_LOSS_COLORSPACE;

  393.         break;

  394.     case FF_COLOR_YUV:

  395.         if (ps->color_type != FF_COLOR_YUV)

  396.             loss |= FF_LOSS_COLORSPACE;

  397.         break;

  398.     case FF_COLOR_YUV_JPEG:

  399.         if (ps->color_type != FF_COLOR_YUV_JPEG &&

  400.             ps->color_type != FF_COLOR_YUV && 

  401.             ps->color_type != FF_COLOR_GRAY)

  402.             loss |= FF_LOSS_COLORSPACE;

  403.         break;

  404.     default:

  405.         /* fail safe test */

  406.         if (ps->color_type != pf->color_type)

  407.             loss |= FF_LOSS_COLORSPACE;

  408.         break;

  409.     }

  410.     if (pf->color_type == FF_COLOR_GRAY &&

  411.         ps->color_type != FF_COLOR_GRAY)

  412.         loss |= FF_LOSS_CHROMA;

  413.     if (!pf->is_alpha && (ps->is_alpha && has_alpha))

  414.         loss |= FF_LOSS_ALPHA;

  415.     if (pf->pixel_type == FF_PIXEL_PALETTE && 

  416.         (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))

  417.         loss |= FF_LOSS_COLORQUANT;

  418.     return loss;

  419. }

  420. 

  421. static int avg_bits_per_pixel(int pix_fmt)

  422. {

  423.     int bits;

  424.     const PixFmtInfo *pf;

  425. 

  426.     pf = &pix_fmt_info[pix_fmt];

  427.     switch(pf->pixel_type) {

  428.     case FF_PIXEL_PACKED:

  429.         switch(pix_fmt) {

  430.         case PIX_FMT_YUV422:

  431.         case PIX_FMT_RGB565:

  432.         case PIX_FMT_RGB555:

  433.             bits = 16;

  434.             break;

  435.         default:

  436.             bits = pf->depth * pf->nb_channels;

  437.             break;

  438.         }

  439.         break;

  440.     case FF_PIXEL_PLANAR:

  441.         if (pf->x_chroma_shift == 0 && pf->y_chroma_shift == 0) {

  442.             bits = pf->depth * pf->nb_channels;

  443.         } else {

  444.             bits = pf->depth + ((2 * pf->depth) >> 

  445.                                 (pf->x_chroma_shift + pf->y_chroma_shift));

  446.         }

  447.         break;

  448.     case FF_PIXEL_PALETTE:

  449.         bits = 8;

  450.         break;

  451.     default:

  452.         bits = -1;

  453.         break;

  454.     }

  455.     return bits;

  456. }

  457. 

  458. static int avcodec_find_best_pix_fmt1(int pix_fmt_mask, 

  459.                                       int src_pix_fmt,

  460.                                       int has_alpha,

  461.                                       int loss_mask)

  462. {

  463.     int dist, i, loss, min_dist, dst_pix_fmt;

  464. 

  465.     /* find exact color match with smallest size */

  466.     dst_pix_fmt = -1;

  467.     min_dist = 0x7fffffff;

  468.     for(i = 0;i < PIX_FMT_NB; i++) {

  469.         if (pix_fmt_mask & (1 << i)) {

  470.             loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask;

  471.             if (loss == 0) {

  472.                 dist = avg_bits_per_pixel(i);

  473.                 if (dist < min_dist) {

  474.                     min_dist = dist;

  475.                     dst_pix_fmt = i;

  476.                 }

  477.             }

  478.         }

  479.     }

  480.     return dst_pix_fmt;

  481. }

  482. 

  483. /** 

  484.  * find best pixel format to convert to. Return -1 if none found 

  485.  */

  486. int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,

  487.                               int has_alpha, int *loss_ptr)

  488. {

  489.     int dst_pix_fmt, loss_mask, i;

  490.     static const int loss_mask_order[] = {

  491.         ~0, /* no loss first */

  492.         ~FF_LOSS_ALPHA,

  493.         ~FF_LOSS_RESOLUTION,

  494.         ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),

  495.         ~FF_LOSS_COLORQUANT,

  496.         ~FF_LOSS_DEPTH,

  497.         0,

  498.     };

  499. 

  500.     /* try with successive loss */

  501.     i = 0;

  502.     for(;;) {

  503.         loss_mask = loss_mask_order[i++];

  504.         dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt, 

  505.                                                  has_alpha, loss_mask);

  506.         if (dst_pix_fmt >= 0)

  507.             goto found;

  508.         if (loss_mask == 0)

  509.             break;

  510.     }

  511.     return -1;

  512.  found:

  513.     if (loss_ptr)

  514.         *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);

  515.     return dst_pix_fmt;

  516. }

  517. 

  518. static void img_copy_plane(uint8_t *dst, int dst_wrap, 

  519.                            const uint8_t *src, int src_wrap,

  520.                            int width, int height)

  521. {

  522.     for(;height > 0; height--) {

  523.         memcpy(dst, src, width);

  524.         dst += dst_wrap;

  525.         src += src_wrap;

  526.     }

  527. }

  528. 

  529. /**

  530.  * Copy image 'src' to 'dst'.

  531.  */

  532. void img_copy(AVPicture *dst, AVPicture *src,

  533.               int pix_fmt, int width, int height)

  534. {

  535.     int bwidth, bits, i;

  536.     PixFmtInfo *pf = &pix_fmt_info[pix_fmt];

  537.     

  538.     pf = &pix_fmt_info[pix_fmt];

  539.     switch(pf->pixel_type) {

  540.     case FF_PIXEL_PACKED:

  541.         switch(pix_fmt) {

  542.         case PIX_FMT_YUV422:

  543.         case PIX_FMT_RGB565:

  544.         case PIX_FMT_RGB555:

  545.             bits = 16;

  546.             break;

  547.         default:

  548.             bits = pf->depth * pf->nb_channels;

  549.             break;

  550.         }

  551.         bwidth = (width * bits + 7) >> 3;

  552.         img_copy_plane(dst->data[0], dst->linesize[0],

  553.                        src->data[0], src->linesize[0],

  554.                        bwidth, height);

  555.         break;

  556.     case FF_PIXEL_PLANAR:

  557.         for(i = 0; i < pf->nb_channels; i++) {

  558.             int w, h;

  559.             w = width;

  560.             h = height;

  561.             if (i == 1 || i == 2) {

  562.                 w >>= pf->x_chroma_shift;

  563.                 h >>= pf->y_chroma_shift;

  564.             }

  565.             bwidth = (w * pf->depth + 7) >> 3;

  566.             img_copy_plane(dst->data[i], dst->linesize[i],

  567.                            src->data[i], src->linesize[i],

  568.                            bwidth, h);

  569.         }

  570.         break;

  571.     case FF_PIXEL_PALETTE:

  572.         img_copy_plane(dst->data[0], dst->linesize[0],

  573.                        src->data[0], src->linesize[0],

  574.                        width, height);

  575.         /* copy the palette */

  576.         img_copy_plane(dst->data[1], dst->linesize[1],

  577.                        src->data[1], src->linesize[1],

  578.                        4, 256);

  579.         break;

  580.     }

  581. }

  582. 

  583. /* XXX: totally non optimized */

  584. 

  585. static void yuv422_to_yuv420p(AVPicture *dst, AVPicture *src,

  586.                               int width, int height)

  587. {

  588.     const uint8_t *p, *p1;

  589.     uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1;

  590.     int x;

  591.  

  592.     p1 = src->data[0];

  593.     lum1 = dst->data[0];

  594.     cb1 = dst->data[1];

  595.     cr1 = dst->data[2];

  596. 

  597.     for(;height >= 2; height -= 2) {

  598.         p = p1;

  599.         lum = lum1;

  600.         cb = cb1;

  601.         cr = cr1;

  602.         for(x=0;x<width;x+=2) {

  603.             lum[0] = p[0];

  604.             cb[0] = p[1];

  605.             lum[1] = p[2];

  606.             cr[0] = p[3];

  607.             p += 4;

  608.             lum += 2;

  609.             cb++;

  610.             cr++;

  611.         }

  612.         p1 += src->linesize[0];

  613.         lum1 += dst->linesize[0];

  614.         p = p1;

  615.         lum = lum1;

  616.         for(x=0;x<width;x+=2) {

  617.             lum[0] = p[0];

  618.             lum[1] = p[2];

  619.             p += 4;

  620.             lum += 2;

  621.         }

  622.         p1 += src->linesize[0];

  623.         lum1 += dst->linesize[0];

  624.         cb1 += dst->linesize[1];

  625.         cr1 += dst->linesize[2];

  626.     }

  627. }

  628. 

  629. static void yuv422_to_yuv422p(AVPicture *dst, AVPicture *src,

  630.                               int width, int height)

  631. {

  632.     const uint8_t *p, *p1;

  633.     uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1;

  634.     int w;

  635. 

  636.     p1 = src->data[0];

  637.     lum1 = dst->data[0];

  638.     cb1 = dst->data[1];

  639.     cr1 = dst->data[2];

  640.     for(;height > 0; height--) {

  641.         p = p1;

  642.         lum = lum1;

  643.         cb = cb1;

  644.         cr = cr1;

  645.         for(w = width; w >= 2; w -= 2) {

  646.             lum[0] = p[0];

  647.             cb[0] = p[1];

  648.             lum[1] = p[2];

  649.             cr[0] = p[3];

  650.             p += 4;

  651.             lum += 2;

  652.             cb++;

  653.             cr++;

  654.         }

  655.         p1 += src->linesize[0];

  656.         lum1 += dst->linesize[0];

  657.         cb1 += dst->linesize[1];

  658.         cr1 += dst->linesize[2];

  659.     }

  660. }

  661. 

  662. static void yuv422p_to_yuv422(AVPicture *dst, AVPicture *src,

  663.                               int width, int height)

  664. {

  665.     uint8_t *p, *p1;

  666.     const uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1;

  667.     int w;

  668. 

  669.     p1 = dst->data[0];

  670.     lum1 = src->data[0];

  671.     cb1 = src->data[1];

  672.     cr1 = src->data[2];

  673.     for(;height > 0; height--) {

  674.         p = p1;

  675.         lum = lum1;

  676.         cb = cb1;

  677.         cr = cr1;

  678.         for(w = width; w >= 2; w -= 2) {

  679.             p[0] = lum[0];

  680.             p[1] = cb[0];

  681.             p[2] = lum[1];

  682.             p[3] = cr[0];

  683.             p += 4;

  684.             lum += 2;

  685.             cb++;

  686.             cr++;

  687.         }

  688.         p1 += dst->linesize[0];

  689.         lum1 += src->linesize[0];

  690.         cb1 += src->linesize[1];

  691.         cr1 += src->linesize[2];

  692.     }

  693. }

  694. 

  695. #define SCALEBITS 10

  696. #define ONE_HALF  (1 << (SCALEBITS - 1))

  697. #define FIX(x)	  ((int) ((x) * (1<<SCALEBITS) + 0.5))

  698. 

  699. #define YUV_TO_RGB1_CCIR(cb1, cr1)\

  700. {\

  701.     cb = (cb1) - 128;\

  702.     cr = (cr1) - 128;\

  703.     r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\

  704.     g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \

  705.             ONE_HALF;\

  706.     b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\

  707. }

  708. 

  709. #define YUV_TO_RGB2_CCIR(r, g, b, y1)\

  710. {\

  711.     y = ((y1) - 16) * FIX(255.0/219.0);\

  712.     r = cm[(y + r_add) >> SCALEBITS];\

  713.     g = cm[(y + g_add) >> SCALEBITS];\

  714.     b = cm[(y + b_add) >> SCALEBITS];\

  715. }

  716. 

  717. #define YUV_TO_RGB1(cb1, cr1)\

  718. {\

  719.     cb = (cb1) - 128;\

  720.     cr = (cr1) - 128;\

  721.     r_add = FIX(1.40200) * cr + ONE_HALF;\

  722.     g_add = - FIX(0.34414) * cb - FIX(0.71414) * cr + ONE_HALF;\

  723.     b_add = FIX(1.77200) * cb + ONE_HALF;\

  724. }

  725. 

  726. #define YUV_TO_RGB2(r, g, b, y1)\

  727. {\

  728.     y = (y1) << SCALEBITS;\

  729.     r = cm[(y + r_add) >> SCALEBITS];\

  730.     g = cm[(y + g_add) >> SCALEBITS];\

  731.     b = cm[(y + b_add) >> SCALEBITS];\

  732. }

  733. 

  734. #define Y_CCIR_TO_JPEG(y)\

  735.  cm[((y) * FIX(255.0/219.0) + (ONE_HALF - 16 * FIX(255.0/219.0))) >> SCALEBITS]

  736. 

  737. #define Y_JPEG_TO_CCIR(y)\

  738.  (((y) * FIX(219.0/255.0) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)

  739. 

  740. #define C_CCIR_TO_JPEG(y)\

  741.  cm[(((y) - 128) * FIX(127.0/112.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS]

  742. 

  743. /* NOTE: the clamp is really necessary! */

  744. #define C_JPEG_TO_CCIR(y)\

  745. ({\

  746.     int __y;\

  747.     __y = ((((y) - 128) * FIX(112.0/127.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS);\

  748.     if (__y < 16)\

  749.          __y = 16;\

  750.     __y;\

  751. })

  752. 

  753. #define RGB_TO_Y(r, g, b) \

  754. ((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \

  755.   FIX(0.11400) * (b) + ONE_HALF) >> SCALEBITS)

  756. 

  757. #define RGB_TO_U(r1, g1, b1, shift)\

  758. (((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +         \

  759.      FIX(0.50000) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  760. 

  761. #define RGB_TO_V(r1, g1, b1, shift)\

  762. (((FIX(0.50000) * r1 - FIX(0.41869) * g1 -           \

  763.    FIX(0.08131) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  764. 

  765. #define RGB_TO_Y_CCIR(r, g, b) \

  766. ((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \

  767.   FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)

  768. 

  769. #define RGB_TO_U_CCIR(r1, g1, b1, shift)\

  770. (((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 +         \

  771.      FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  772. 

  773. #define RGB_TO_V_CCIR(r1, g1, b1, shift)\

  774. (((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 -           \

  775.    FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  776. 

  777. static uint8_t y_ccir_to_jpeg[256];

  778. static uint8_t y_jpeg_to_ccir[256];

  779. static uint8_t c_ccir_to_jpeg[256];

  780. static uint8_t c_jpeg_to_ccir[256];

  781. 

  782. /* init various conversion tables */

  783. static void img_convert_init(void)

  784. {

  785.     int i;

  786.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  787. 

  788.     for(i = 0;i < 256; i++) {

  789.         y_ccir_to_jpeg[i] = Y_CCIR_TO_JPEG(i);

  790.         y_jpeg_to_ccir[i] = Y_JPEG_TO_CCIR(i);

  791.         c_ccir_to_jpeg[i] = C_CCIR_TO_JPEG(i);

  792.         c_jpeg_to_ccir[i] = C_JPEG_TO_CCIR(i);

  793.     }

  794. }

  795. 

  796. /* apply to each pixel the given table */

  797. static void img_apply_table(uint8_t *dst, int dst_wrap, 

  798.                             const uint8_t *src, int src_wrap,

  799.                             int width, int height, const uint8_t *table1)

  800. {

  801.     int n;

  802.     const uint8_t *s;

  803.     uint8_t *d;

  804.     const uint8_t *table;

  805. 

  806.     table = table1;

  807.     for(;height > 0; height--) {

  808.         s = src;

  809.         d = dst;

  810.         n = width;

  811.         while (n >= 4) {

  812.             d[0] = table[s[0]];

  813.             d[1] = table[s[1]];

  814.             d[2] = table[s[2]];

  815.             d[3] = table[s[3]];

  816.             d += 4;

  817.             s += 4;

  818.             n -= 4;

  819.         }

  820.         while (n > 0) {

  821.             d[0] = table[s[0]];

  822.             d++;

  823.             s++;

  824.             n--;

  825.         }

  826.         dst += dst_wrap;

  827.         src += src_wrap;

  828.     }

  829. }

  830. 

  831. /* XXX: use generic filter ? */

  832. /* XXX: in most cases, the sampling position is incorrect */

  833. 

  834. /* 4x1 -> 1x1 */

  835. static void shrink41(uint8_t *dst, int dst_wrap, 

  836.                      const uint8_t *src, int src_wrap,

  837.                      int width, int height)

  838. {

  839.     int w;

  840.     const uint8_t *s;

  841.     uint8_t *d;

  842. 

  843.     for(;height > 0; height--) {

  844.         s = src;

  845.         d = dst;

  846.         for(w = width;w > 0; w--) {

  847.             d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2;

  848.             s += 4;

  849.             d++;

  850.         }

  851.         src += src_wrap;

  852.         dst += dst_wrap;

  853.     }

  854. }

  855. 

  856. /* 2x1 -> 1x1 */

  857. static void shrink21(uint8_t *dst, int dst_wrap, 

  858.                      const uint8_t *src, int src_wrap,

  859.                      int width, int height)

  860. {

  861.     int w;

  862.     const uint8_t *s;

  863.     uint8_t *d;

  864. 

  865.     for(;height > 0; height--) {

  866.         s = src;

  867.         d = dst;

  868.         for(w = width;w > 0; w--) {

  869.             d[0] = (s[0] + s[1]) >> 1;

  870.             s += 2;

  871.             d++;

  872.         }

  873.         src += src_wrap;

  874.         dst += dst_wrap;

  875.     }

  876. }

  877. 

  878. /* 1x2 -> 1x1 */

  879. static void shrink12(uint8_t *dst, int dst_wrap, 

  880.                      const uint8_t *src, int src_wrap,

  881.                      int width, int height)

  882. {

  883.     int w;

  884.     uint8_t *d;

  885.     const uint8_t *s1, *s2;

  886. 

  887.     for(;height > 0; height--) {

  888.         s1 = src;

  889.         s2 = s1 + src_wrap;

  890.         d = dst;

  891.         for(w = width;w >= 4; w-=4) {

  892.             d[0] = (s1[0] + s2[0]) >> 1;

  893.             d[1] = (s1[1] + s2[1]) >> 1;

  894.             d[2] = (s1[2] + s2[2]) >> 1;

  895.             d[3] = (s1[3] + s2[3]) >> 1;

  896.             s1 += 4;

  897.             s2 += 4;

  898.             d += 4;

  899.         }

  900.         for(;w > 0; w--) {

  901.             d[0] = (s1[0] + s2[0]) >> 1;

  902.             s1++;

  903.             s2++;

  904.             d++;

  905.         }

  906.         src += 2 * src_wrap;

  907.         dst += dst_wrap;

  908.     }

  909. }

  910. 

  911. /* 2x2 -> 1x1 */

  912. static void shrink22(uint8_t *dst, int dst_wrap, 

  913.                      const uint8_t *src, int src_wrap,

  914.                      int width, int height)

  915. {

  916.     int w;

  917.     const uint8_t *s1, *s2;

  918.     uint8_t *d;

  919. 

  920.     for(;height > 0; height--) {

  921.         s1 = src;

  922.         s2 = s1 + src_wrap;

  923.         d = dst;

  924.         for(w = width;w >= 4; w-=4) {

  925.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  926.             d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;

  927.             d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;

  928.             d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;

  929.             s1 += 8;

  930.             s2 += 8;

  931.             d += 4;

  932.         }

  933.         for(;w > 0; w--) {

  934.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  935.             s1 += 2;

  936.             s2 += 2;

  937.             d++;

  938.         }

  939.         src += 2 * src_wrap;

  940.         dst += dst_wrap;

  941.     }

  942. }

  943. 

  944. /* 4x4 -> 1x1 */

  945. static void shrink44(uint8_t *dst, int dst_wrap, 

  946.                      const uint8_t *src, int src_wrap,

  947.                      int width, int height)

  948. {

  949.     int w;

  950.     const uint8_t *s1, *s2, *s3, *s4;

  951.     uint8_t *d;

  952. 

  953.     for(;height > 0; height--) {

  954.         s1 = src;

  955.         s2 = s1 + src_wrap;

  956.         s3 = s2 + src_wrap;

  957.         s4 = s3 + src_wrap;

  958.         d = dst;

  959.         for(w = width;w > 0; w--) {

  960.             d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +

  961.                     s2[0] + s2[1] + s2[2] + s2[3] +

  962.                     s3[0] + s3[1] + s3[2] + s3[3] +

  963.                     s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;

  964.             s1 += 4;

  965.             s2 += 4;

  966.             s3 += 4;

  967.             s4 += 4;

  968.             d++;

  969.         }

  970.         src += 4 * src_wrap;

  971.         dst += dst_wrap;

  972.     }

  973. }

  974. 

  975. static void grow21_line(uint8_t *dst, const uint8_t *src,

  976.                         int width)

  977. {

  978.     int w;

  979.     const uint8_t *s1;

  980.     uint8_t *d;

  981. 

  982.     s1 = src;

  983.     d = dst;

  984.     for(w = width;w >= 4; w-=4) {

  985.         d[1] = d[0] = s1[0];

  986.         d[3] = d[2] = s1[1];

  987.         s1 += 2;

  988.         d += 4;

  989.     }

  990.     for(;w >= 2; w -= 2) {

  991.         d[1] = d[0] = s1[0];

  992.         s1 ++;

  993.         d += 2;

  994.     }

  995.     /* only needed if width is not a multiple of two */

  996.     /* XXX: veryfy that */

  997.     if (w) {

  998.         d[0] = s1[0];

  999.     }

  1000. }

  1001. 

  1002. static void grow41_line(uint8_t *dst, const uint8_t *src,

  1003.                         int width)

  1004. {

  1005.     int w, v;

  1006.     const uint8_t *s1;

  1007.     uint8_t *d;

  1008. 

  1009.     s1 = src;

  1010.     d = dst;

  1011.     for(w = width;w >= 4; w-=4) {

  1012.         v = s1[0];

  1013.         d[0] = v;

  1014.         d[1] = v;

  1015.         d[2] = v;

  1016.         d[3] = v;

  1017.         s1 ++;

  1018.         d += 4;

  1019.     }

  1020. }

  1021. 

  1022. /* 1x1 -> 2x1 */

  1023. static void grow21(uint8_t *dst, int dst_wrap,

  1024.                    const uint8_t *src, int src_wrap,

  1025.                    int width, int height)

  1026. {

  1027.     for(;height > 0; height--) {

  1028.         grow21_line(dst, src, width);

  1029.         src += src_wrap;

  1030.         dst += dst_wrap;

  1031.     }

  1032. }

  1033. 

  1034. /* 1x1 -> 2x2 */

  1035. static void grow22(uint8_t *dst, int dst_wrap,

  1036.                    const uint8_t *src, int src_wrap,

  1037.                    int width, int height)

  1038. {

  1039.     for(;height > 0; height--) {

  1040.         grow21_line(dst, src, width);

  1041.         if (height%2)

  1042.             src += src_wrap;

  1043.         dst += dst_wrap;

  1044.     }

  1045. }

  1046. 

  1047. /* 1x1 -> 4x1 */

  1048. static void grow41(uint8_t *dst, int dst_wrap,

  1049.                    const uint8_t *src, int src_wrap,

  1050.                    int width, int height)

  1051. {

  1052.     for(;height > 0; height--) {

  1053.         grow41_line(dst, src, width);

  1054.         src += src_wrap;

  1055.         dst += dst_wrap;

  1056.     }

  1057. }

  1058. 

  1059. /* 1x1 -> 4x4 */

  1060. static void grow44(uint8_t *dst, int dst_wrap,

  1061.                    const uint8_t *src, int src_wrap,

  1062.                    int width, int height)

  1063. {

  1064.     for(;height > 0; height--) {

  1065.         grow41_line(dst, src, width);

  1066.         if ((height & 3) == 1)

  1067.             src += src_wrap;

  1068.         dst += dst_wrap;

  1069.     }

  1070. }

  1071. 

  1072. /* 1x2 -> 2x1 */

  1073. static void conv411(uint8_t *dst, int dst_wrap, 

  1074.                     const uint8_t *src, int src_wrap,

  1075.                     int width, int height)

  1076. {

  1077.     int w, c;

  1078.     const uint8_t *s1, *s2;

  1079.     uint8_t *d;

  1080. 

  1081.     width>>=1;

  1082. 

  1083.     for(;height > 0; height--) {

  1084.         s1 = src;

  1085.         s2 = src + src_wrap;

  1086.         d = dst;

  1087.         for(w = width;w > 0; w--) {

  1088.             c = (s1[0] + s2[0]) >> 1;

  1089.             d[0] = c;

  1090.             d[1] = c;

  1091.             s1++;

  1092.             s2++;

  1093.             d += 2;

  1094.         }

  1095.         src += src_wrap * 2;

  1096.         dst += dst_wrap;

  1097.     }

  1098. }

  1099. 

  1100. /* XXX: add jpeg quantize code */

  1101. 

  1102. #define TRANSP_INDEX (6*6*6)

  1103. 

  1104. /* this is maybe slow, but allows for extensions */

  1105. static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)

  1106. {

  1107.     return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));

  1108. }

  1109. 

  1110. static void build_rgb_palette(uint8_t *palette, int has_alpha)

  1111. {

  1112.     uint32_t *pal;

  1113.     static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };

  1114.     int i, r, g, b;

  1115. 

  1116.     pal = (uint32_t *)palette;

  1117.     i = 0;

  1118.     for(r = 0; r < 6; r++) {

  1119.         for(g = 0; g < 6; g++) {

  1120.             for(b = 0; b < 6; b++) {

  1121.                 pal[i++] = (0xff << 24) | (pal_value[r] << 16) | 

  1122.                     (pal_value[g] << 8) | pal_value[b];

  1123.             }

  1124.         }

  1125.     }

  1126.     if (has_alpha)

  1127.         pal[i++] = 0;

  1128.     while (i < 256)

  1129.         pal[i++] = 0xff000000;

  1130. }

  1131. 

  1132. /* copy bit n to bits 0 ... n - 1 */

  1133. static inline unsigned int bitcopy_n(unsigned int a, int n)

  1134. {

  1135.     int mask;

  1136.     mask = (1 << n) - 1;

  1137.     return (a & (0xff & ~mask)) | ((-((a >> n) & 1)) & mask);

  1138. }

  1139. 

  1140. /* rgb555 handling */

  1141. 

  1142. #define RGB_NAME rgb555

  1143. 

  1144. #define RGB_IN(r, g, b, s)\

  1145. {\

  1146.     unsigned int v = ((const uint16_t *)(s))[0];\

  1147.     r = bitcopy_n(v >> (10 - 3), 3);\

  1148.     g = bitcopy_n(v >> (5 - 3), 3);\

  1149.     b = bitcopy_n(v << 3, 3);\

  1150. }

  1151. 

  1152. #define RGBA_IN(r, g, b, a, s)\

  1153. {\

  1154.     unsigned int v = ((const uint16_t *)(s))[0];\

  1155.     r = bitcopy_n(v >> (10 - 3), 3);\

  1156.     g = bitcopy_n(v >> (5 - 3), 3);\

  1157.     b = bitcopy_n(v << 3, 3);\

  1158.     a = (-(v >> 15)) & 0xff;\

  1159. }

  1160. 

  1161. #define RGBA_OUT(d, r, g, b, a)\

  1162. {\

  1163.     ((uint16_t *)(d))[0] = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3) | \

  1164.                            ((a << 8) & 0x8000);\

  1165. }

  1166. 

  1167. #define BPP 2

  1168. 

  1169. #include "imgconvert_template.h"

  1170. 

  1171. /* rgb565 handling */

  1172. 

  1173. #define RGB_NAME rgb565

  1174. 

  1175. #define RGB_IN(r, g, b, s)\

  1176. {\

  1177.     unsigned int v = ((const uint16_t *)(s))[0];\

  1178.     r = bitcopy_n(v >> (11 - 3), 3);\

  1179.     g = bitcopy_n(v >> (5 - 2), 2);\

  1180.     b = bitcopy_n(v << 3, 3);\

  1181. }

  1182. 

  1183. #define RGB_OUT(d, r, g, b)\

  1184. {\

  1185.     ((uint16_t *)(d))[0] = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);\

  1186. }

  1187. 

  1188. #define BPP 2

  1189. 

  1190. #include "imgconvert_template.h"

  1191. 

  1192. /* bgr24 handling */

  1193. 

  1194. #define RGB_NAME bgr24

  1195. 

  1196. #define RGB_IN(r, g, b, s)\

  1197. {\

  1198.     b = (s)[0];\

  1199.     g = (s)[1];\

  1200.     r = (s)[2];\

  1201. }

  1202. 

  1203. #define RGB_OUT(d, r, g, b)\

  1204. {\

  1205.     (d)[0] = b;\

  1206.     (d)[1] = g;\

  1207.     (d)[2] = r;\

  1208. }

  1209. 

  1210. #define BPP 3

  1211. 

  1212. #include "imgconvert_template.h"

  1213. 

  1214. #undef RGB_IN

  1215. #undef RGB_OUT

  1216. #undef BPP

  1217. 

  1218. /* rgb24 handling */

  1219. 

  1220. #define RGB_NAME rgb24

  1221. #define FMT_RGB24

  1222. 

  1223. #define RGB_IN(r, g, b, s)\

  1224. {\

  1225.     r = (s)[0];\

  1226.     g = (s)[1];\

  1227.     b = (s)[2];\

  1228. }

  1229. 

  1230. #define RGB_OUT(d, r, g, b)\

  1231. {\

  1232.     (d)[0] = r;\

  1233.     (d)[1] = g;\

  1234.     (d)[2] = b;\

  1235. }

  1236. 

  1237. #define BPP 3

  1238. 

  1239. #include "imgconvert_template.h"

  1240. 

  1241. /* rgba32 handling */

  1242. 

  1243. #define RGB_NAME rgba32

  1244. #define FMT_RGBA32

  1245. 

  1246. #define RGB_IN(r, g, b, s)\

  1247. {\

  1248.     unsigned int v = ((const uint32_t *)(s))[0];\

  1249.     r = (v >> 16) & 0xff;\

  1250.     g = (v >> 8) & 0xff;\

  1251.     b = v & 0xff;\

  1252. }

  1253. 

  1254. #define RGBA_IN(r, g, b, a, s)\

  1255. {\

  1256.     unsigned int v = ((const uint32_t *)(s))[0];\

  1257.     a = (v >> 24) & 0xff;\

  1258.     r = (v >> 16) & 0xff;\

  1259.     g = (v >> 8) & 0xff;\

  1260.     b = v & 0xff;\

  1261. }

  1262. 

  1263. #define RGBA_OUT(d, r, g, b, a)\

  1264. {\

  1265.     ((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;\

  1266. }

  1267. 

  1268. #define BPP 4

  1269. 

  1270. #include "imgconvert_template.h"

  1271. 

  1272. static void mono_to_gray(AVPicture *dst, AVPicture *src,

  1273.                          int width, int height, int xor_mask)

  1274. {

  1275.     const unsigned char *p;

  1276.     unsigned char *q;

  1277.     int v, dst_wrap, src_wrap;

  1278.     int y, w;

  1279. 

  1280.     p = src->data[0];

  1281.     src_wrap = src->linesize[0] - ((width + 7) >> 3);

  1282. 

  1283.     q = dst->data[0];

  1284.     dst_wrap = dst->linesize[0] - width;

  1285.     for(y=0;y<height;y++) {

  1286.         w = width; 

  1287.         while (w >= 8) {

  1288.             v = *p++ ^ xor_mask;

  1289.             q[0] = -(v >> 7);

  1290.             q[1] = -((v >> 6) & 1);

  1291.             q[2] = -((v >> 5) & 1);

  1292.             q[3] = -((v >> 4) & 1);

  1293.             q[4] = -((v >> 3) & 1);

  1294.             q[5] = -((v >> 2) & 1);

  1295.             q[6] = -((v >> 1) & 1);

  1296.             q[7] = -((v >> 0) & 1);

  1297.             w -= 8;

  1298.             q += 8;

  1299.         }

  1300.         if (w > 0) {

  1301.             v = *p++ ^ xor_mask;

  1302.             do {

  1303.                 q[0] = -((v >> 7) & 1);

  1304.                 q++;

  1305.                 v <<= 1;

  1306.             } while (--w);

  1307.         }

  1308.         p += src_wrap;

  1309.         q += dst_wrap;

  1310.     }

  1311. }

  1312. 

  1313. static void monowhite_to_gray(AVPicture *dst, AVPicture *src,

  1314.                                int width, int height)

  1315. {

  1316.     mono_to_gray(dst, src, width, height, 0xff);

  1317. }

  1318. 

  1319. static void monoblack_to_gray(AVPicture *dst, AVPicture *src,

  1320.                                int width, int height)

  1321. {

  1322.     mono_to_gray(dst, src, width, height, 0x00);

  1323. }

  1324. 

  1325. static void gray_to_mono(AVPicture *dst, AVPicture *src,

  1326.                          int width, int height, int xor_mask)

  1327. {

  1328.     int n;

  1329.     const uint8_t *s;

  1330.     uint8_t *d;

  1331.     int j, b, v, n1, src_wrap, dst_wrap, y;

  1332. 

  1333.     s = src->data[0];

  1334.     src_wrap = src->linesize[0] - width;

  1335. 

  1336.     d = dst->data[0];

  1337.     dst_wrap = dst->linesize[0] - ((width + 7) >> 3);

  1338. 

  1339.     for(y=0;y<height;y++) {

  1340.         n = width;

  1341.         while (n >= 8) {

  1342.             v = 0;

  1343.             for(j=0;j<8;j++) {

  1344.                 b = s[0];

  1345.                 s++;

  1346.                 v = (v << 1) | (b >> 7);

  1347.             }

  1348.             d[0] = v ^ xor_mask;

  1349.             d++;

  1350.             n -= 8;

  1351.         }

  1352.         if (n > 0) {

  1353.             n1 = n;

  1354.             v = 0;

  1355.             while (n > 0) {

  1356.                 b = s[0];

  1357.                 s++;

  1358.                 v = (v << 1) | (b >> 7);

  1359.                 n--;

  1360.             }

  1361.             d[0] = (v << (8 - (n1 & 7))) ^ xor_mask;

  1362.             d++;

  1363.         }

  1364.         s += src_wrap;

  1365.         d += dst_wrap;

  1366.     }

  1367. }

  1368. 

  1369. static void gray_to_monowhite(AVPicture *dst, AVPicture *src,

  1370.                               int width, int height)

  1371. {

  1372.     gray_to_mono(dst, src, width, height, 0xff);

  1373. }

  1374. 

  1375. static void gray_to_monoblack(AVPicture *dst, AVPicture *src,

  1376.                               int width, int height)

  1377. {

  1378.     gray_to_mono(dst, src, width, height, 0x00);

  1379. }

  1380. 

  1381. typedef struct ConvertEntry {

  1382.     void (*convert)(AVPicture *dst, AVPicture *src, int width, int height);

  1383. } ConvertEntry;

  1384. 

  1385. /* Add each new convertion function in this table. In order to be able

  1386.    to convert from any format to any format, the following constraints

  1387.    must be satisfied:

  1388. 

  1389.    - all FF_COLOR_RGB formats must convert to and from PIX_FMT_RGB24 

  1390. 

  1391.    - all FF_COLOR_GRAY formats must convert to and from PIX_FMT_GRAY8

  1392. 

  1393.    - all FF_COLOR_RGB formats with alpha must convert to and from PIX_FMT_RGBA32

  1394. 

  1395.    - PIX_FMT_YUV444P and PIX_FMT_YUVJ444P must convert to and from

  1396.      PIX_FMT_RGB24.

  1397. 

  1398.    - PIX_FMT_422 must convert to and from PIX_FMT_422P.

  1399. 

  1400.    The other conversion functions are just optimisations for common cases.

  1401. */

  1402. static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {

  1403.     [PIX_FMT_YUV420P] = {

  1404.         [PIX_FMT_RGB555] = { 

  1405.             .convert = yuv420p_to_rgb555

  1406.         },

  1407.         [PIX_FMT_RGB565] = { 

  1408.             .convert = yuv420p_to_rgb565

  1409.         },

  1410.         [PIX_FMT_BGR24] = { 

  1411.             .convert = yuv420p_to_bgr24

  1412.         },

  1413.         [PIX_FMT_RGB24] = { 

  1414.             .convert = yuv420p_to_rgb24

  1415.         },

  1416.         [PIX_FMT_RGBA32] = { 

  1417.             .convert = yuv420p_to_rgba32

  1418.         },

  1419.     },

  1420.     [PIX_FMT_YUV422P] = { 

  1421.         [PIX_FMT_YUV422] = { 

  1422.             .convert = yuv422p_to_yuv422,

  1423.         },

  1424.     },

  1425.     [PIX_FMT_YUV444P] = { 

  1426.         [PIX_FMT_RGB24] = { 

  1427.             .convert = yuv444p_to_rgb24

  1428.         },

  1429.     },

  1430.     [PIX_FMT_YUVJ420P] = {

  1431.         [PIX_FMT_RGB555] = { 

  1432.             .convert = yuvj420p_to_rgb555

  1433.         },

  1434.         [PIX_FMT_RGB565] = { 

  1435.             .convert = yuvj420p_to_rgb565

  1436.         },

  1437.         [PIX_FMT_BGR24] = { 

  1438.             .convert = yuvj420p_to_bgr24

  1439.         },

  1440.         [PIX_FMT_RGB24] = { 

  1441.             .convert = yuvj420p_to_rgb24

  1442.         },

  1443.         [PIX_FMT_RGBA32] = { 

  1444.             .convert = yuvj420p_to_rgba32

  1445.         },

  1446.     },

  1447.     [PIX_FMT_YUVJ444P] = { 

  1448.         [PIX_FMT_RGB24] = { 

  1449.             .convert = yuvj444p_to_rgb24

  1450.         },

  1451.     },

  1452.     [PIX_FMT_YUV422] = { 

  1453.         [PIX_FMT_YUV420P] = { 

  1454.             .convert = yuv422_to_yuv420p,

  1455.         },

  1456.         [PIX_FMT_YUV422P] = { 

  1457.             .convert = yuv422_to_yuv422p,

  1458.         },

  1459.     },

  1460. 

  1461.     [PIX_FMT_RGB24] = {

  1462.         [PIX_FMT_YUV420P] = { 

  1463.             .convert = rgb24_to_yuv420p

  1464.         },

  1465.         [PIX_FMT_RGB565] = { 

  1466.             .convert = rgb24_to_rgb565

  1467.         },

  1468.         [PIX_FMT_RGB555] = { 

  1469.             .convert = rgb24_to_rgb555

  1470.         },

  1471.         [PIX_FMT_RGBA32] = { 

  1472.             .convert = rgb24_to_rgba32

  1473.         },

  1474.         [PIX_FMT_BGR24] = { 

  1475.             .convert = rgb24_to_bgr24

  1476.         },

  1477.         [PIX_FMT_GRAY8] = { 

  1478.             .convert = rgb24_to_gray

  1479.         },

  1480.         [PIX_FMT_PAL8] = {

  1481.             .convert = rgb24_to_pal8

  1482.         },

  1483.         [PIX_FMT_YUV444P] = { 

  1484.             .convert = rgb24_to_yuv444p

  1485.         },

  1486.         [PIX_FMT_YUVJ420P] = { 

  1487.             .convert = rgb24_to_yuvj420p

  1488.         },

  1489.         [PIX_FMT_YUVJ444P] = { 

  1490.             .convert = rgb24_to_yuvj444p

  1491.         },

  1492.     },

  1493.     [PIX_FMT_RGBA32] = {

  1494.         [PIX_FMT_RGB24] = { 

  1495.             .convert = rgba32_to_rgb24

  1496.         },

  1497.         [PIX_FMT_RGB555] = { 

  1498.             .convert = rgba32_to_rgb555

  1499.         },

  1500.         [PIX_FMT_PAL8] = { 

  1501.             .convert = rgba32_to_pal8

  1502.         },

  1503.         [PIX_FMT_YUV420P] = { 

  1504.             .convert = rgba32_to_yuv420p

  1505.         },

  1506.         [PIX_FMT_GRAY8] = { 

  1507.             .convert = rgba32_to_gray

  1508.         },

  1509.     },

  1510.     [PIX_FMT_BGR24] = {

  1511.         [PIX_FMT_RGB24] = { 

  1512.             .convert = bgr24_to_rgb24

  1513.         },

  1514.         [PIX_FMT_YUV420P] = { 

  1515.             .convert = bgr24_to_yuv420p

  1516.         },

  1517.         [PIX_FMT_GRAY8] = { 

  1518.             .convert = bgr24_to_gray

  1519.         },

  1520.     },

  1521.     [PIX_FMT_RGB555] = {

  1522.         [PIX_FMT_RGB24] = { 

  1523.             .convert = rgb555_to_rgb24

  1524.         },

  1525.         [PIX_FMT_RGBA32] = { 

  1526.             .convert = rgb555_to_rgba32

  1527.         },

  1528.         [PIX_FMT_YUV420P] = { 

  1529.             .convert = rgb555_to_yuv420p

  1530.         },

  1531.         [PIX_FMT_GRAY8] = { 

  1532.             .convert = rgb555_to_gray

  1533.         },

  1534.     },

  1535.     [PIX_FMT_RGB565] = {

  1536.         [PIX_FMT_RGB24] = { 

  1537.             .convert = rgb565_to_rgb24

  1538.         },

  1539.         [PIX_FMT_YUV420P] = { 

  1540.             .convert = rgb565_to_yuv420p

  1541.         },

  1542.         [PIX_FMT_GRAY8] = { 

  1543.             .convert = rgb565_to_gray

  1544.         },

  1545.     },

  1546.     [PIX_FMT_GRAY8] = {

  1547.         [PIX_FMT_RGB555] = { 

  1548.             .convert = gray_to_rgb555

  1549.         },

  1550.         [PIX_FMT_RGB565] = { 

  1551.             .convert = gray_to_rgb565

  1552.         },

  1553.         [PIX_FMT_RGB24] = { 

  1554.             .convert = gray_to_rgb24

  1555.         },

  1556.         [PIX_FMT_BGR24] = { 

  1557.             .convert = gray_to_bgr24

  1558.         },

  1559.         [PIX_FMT_RGBA32] = { 

  1560.             .convert = gray_to_rgba32

  1561.         },

  1562.         [PIX_FMT_MONOWHITE] = { 

  1563.             .convert = gray_to_monowhite

  1564.         },

  1565.         [PIX_FMT_MONOBLACK] = { 

  1566.             .convert = gray_to_monoblack

  1567.         },

  1568.     },

  1569.     [PIX_FMT_MONOWHITE] = {

  1570.         [PIX_FMT_GRAY8] = { 

  1571.             .convert = monowhite_to_gray

  1572.         },

  1573.     },

  1574.     [PIX_FMT_MONOBLACK] = {

  1575.         [PIX_FMT_GRAY8] = { 

  1576.             .convert = monoblack_to_gray

  1577.         },

  1578.     },

  1579.     [PIX_FMT_PAL8] = {

  1580.         [PIX_FMT_RGB555] = { 

  1581.             .convert = pal8_to_rgb555

  1582.         },

  1583.         [PIX_FMT_RGB565] = { 

  1584.             .convert = pal8_to_rgb565

  1585.         },

  1586.         [PIX_FMT_BGR24] = { 

  1587.             .convert = pal8_to_bgr24

  1588.         },

  1589.         [PIX_FMT_RGB24] = { 

  1590.             .convert = pal8_to_rgb24

  1591.         },

  1592.         [PIX_FMT_RGBA32] = { 

  1593.             .convert = pal8_to_rgba32

  1594.         },

  1595.     },

  1596. };

  1597. 

  1598. static int avpicture_alloc(AVPicture *picture,

  1599.                            int pix_fmt, int width, int height)

  1600. {

  1601.     unsigned int size;

  1602.     void *ptr;

  1603. 

  1604.     size = avpicture_get_size(pix_fmt, width, height);

  1605.     if (size < 0)

  1606.         goto fail;

  1607.     ptr = av_malloc(size);

  1608.     if (!ptr)

  1609.         goto fail;

  1610.     avpicture_fill(picture, ptr, pix_fmt, width, height);

  1611.     return 0;

  1612.  fail:

  1613.     memset(picture, 0, sizeof(AVPicture));

  1614.     return -1;

  1615. }

  1616. 

  1617. static void avpicture_free(AVPicture *picture)

  1618. {

  1619.     av_free(picture->data[0]);

  1620. }

  1621. 

  1622. /* return true if yuv planar */

  1623. static inline int is_yuv_planar(PixFmtInfo *ps)

  1624. {

  1625.     return (ps->color_type == FF_COLOR_YUV ||

  1626.             ps->color_type == FF_COLOR_YUV_JPEG) && 

  1627.         ps->pixel_type == FF_PIXEL_PLANAR;

  1628. }

  1629. 

  1630. /* XXX: always use linesize. Return -1 if not supported */

  1631. int img_convert(AVPicture *dst, int dst_pix_fmt,

  1632.                 AVPicture *src, int src_pix_fmt, 

  1633.                 int src_width, int src_height)

  1634. {

  1635.     static int inited;

  1636.     int i, ret, dst_width, dst_height, int_pix_fmt;

  1637.     PixFmtInfo *src_pix, *dst_pix;

  1638.     ConvertEntry *ce;

  1639.     AVPicture tmp1, *tmp = &tmp1;

  1640. 

  1641.     if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB ||

  1642.         dst_pix_fmt < 0 || dst_pix_fmt >= PIX_FMT_NB)

  1643.         return -1;

  1644.     if (src_width <= 0 || src_height <= 0)

  1645.         return 0;

  1646. 

  1647.     if (!inited) {

  1648.         inited = 1;

  1649.         img_convert_init();

  1650.     }

  1651. 

  1652.     dst_width = src_width;

  1653.     dst_height = src_height;

  1654. 

  1655.     dst_pix = &pix_fmt_info[dst_pix_fmt];

  1656.     src_pix = &pix_fmt_info[src_pix_fmt];

  1657.     if (src_pix_fmt == dst_pix_fmt) {

  1658.         /* no conversion needed: just copy */

  1659.         img_copy(dst, src, dst_pix_fmt, dst_width, dst_height);

  1660.         return 0;

  1661.     }

  1662. 

  1663.     ce = &convert_table[src_pix_fmt][dst_pix_fmt];

  1664.     if (ce->convert) {

  1665.         /* specific convertion routine */

  1666.         ce->convert(dst, src, dst_width, dst_height);

  1667.         return 0;

  1668.     }

  1669. 

  1670.     /* gray to YUV */

  1671.     if (is_yuv_planar(dst_pix) &&

  1672.         src_pix_fmt == PIX_FMT_GRAY8) {

  1673.         int w, h, y;

  1674.         uint8_t *d;

  1675. 

  1676.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG) {

  1677.             img_copy_plane(dst->data[0], dst->linesize[0],

  1678.                      src->data[0], src->linesize[0],

  1679.                      dst_width, dst_height);

  1680.         } else {

  1681.             img_apply_table(dst->data[0], dst->linesize[0],

  1682.                             src->data[0], src->linesize[0],

  1683.                             dst_width, dst_height,

  1684.                             y_jpeg_to_ccir);

  1685.         }

  1686.         /* fill U and V with 128 */

  1687.         w = dst_width;

  1688.         h = dst_height;

  1689.         w >>= dst_pix->x_chroma_shift;

  1690.         h >>= dst_pix->y_chroma_shift;

  1691.         for(i = 1; i <= 2; i++) {

  1692.             d = dst->data[i];

  1693.             for(y = 0; y< h; y++) {

  1694.                 memset(d, 128, w);

  1695.                 d += dst->linesize[i];

  1696.             }

  1697.         }

  1698.         return 0;

  1699.     }

  1700. 

  1701.     /* YUV to gray */

  1702.     if (is_yuv_planar(src_pix) && 

  1703.         dst_pix_fmt == PIX_FMT_GRAY8) {

  1704.         if (src_pix->color_type == FF_COLOR_YUV_JPEG) {

  1705.             img_copy_plane(dst->data[0], dst->linesize[0],

  1706.                      src->data[0], src->linesize[0],

  1707.                      dst_width, dst_height);

  1708.         } else {

  1709.             img_apply_table(dst->data[0], dst->linesize[0],

  1710.                             src->data[0], src->linesize[0],

  1711.                             dst_width, dst_height,

  1712.                             y_ccir_to_jpeg);

  1713.         }

  1714.         return 0;

  1715.     }

  1716. 

  1717.     /* YUV to YUV planar */

  1718.     if (is_yuv_planar(dst_pix) && is_yuv_planar(src_pix)) {

  1719.         int x_shift, y_shift, w, h, xy_shift;

  1720.         void (*resize_func)(uint8_t *dst, int dst_wrap, 

  1721.                             const uint8_t *src, int src_wrap,

  1722.                             int width, int height);

  1723. 

  1724.         /* compute chroma size of the smallest dimensions */

  1725.         w = dst_width;

  1726.         h = dst_height;

  1727.         if (dst_pix->x_chroma_shift >= src_pix->x_chroma_shift)

  1728.             w >>= dst_pix->x_chroma_shift;

  1729.         else

  1730.             w >>= src_pix->x_chroma_shift;

  1731.         if (dst_pix->y_chroma_shift >= src_pix->y_chroma_shift)

  1732.             h >>= dst_pix->y_chroma_shift;

  1733.         else

  1734.             h >>= src_pix->y_chroma_shift;

  1735. 

  1736.         x_shift = (dst_pix->x_chroma_shift - src_pix->x_chroma_shift);

  1737.         y_shift = (dst_pix->y_chroma_shift - src_pix->y_chroma_shift);

  1738.         xy_shift = ((x_shift & 0xf) << 4) | (y_shift & 0xf);

  1739.         /* there must be filters for conversion at least from and to

  1740.            YUV444 format */

  1741.         switch(xy_shift) {

  1742.         case 0x00:

  1743.             resize_func = img_copy_plane;

  1744.             break;

  1745.         case 0x10:

  1746.             resize_func = shrink21;

  1747.             break;

  1748.         case 0x20:

  1749.             resize_func = shrink41;

  1750.             break;

  1751.         case 0x01:

  1752.             resize_func = shrink12;

  1753.             break;

  1754.         case 0x11:

  1755.             resize_func = shrink22;

  1756.             break;

  1757.         case 0x22:

  1758.             resize_func = shrink44;

  1759.             break;

  1760.         case 0xf0:

  1761.             resize_func = grow21;

  1762.             break;

  1763.         case 0xe0:

  1764.             resize_func = grow41;

  1765.             break;

  1766.         case 0xff:

  1767.             resize_func = grow22;

  1768.             break;

  1769.         case 0xee:

  1770.             resize_func = grow44;

  1771.             break;

  1772.         case 0xf1:

  1773.             resize_func = conv411;

  1774.             break;

  1775.         default:

  1776.             /* currently not handled */

  1777.             goto no_chroma_filter;

  1778.         }

  1779. 

  1780.         img_copy_plane(dst->data[0], dst->linesize[0],

  1781.                        src->data[0], src->linesize[0],

  1782.                        dst_width, dst_height);

  1783. 

  1784.         for(i = 1;i <= 2; i++)

  1785.             resize_func(dst->data[i], dst->linesize[i],

  1786.                         src->data[i], src->linesize[i],

  1787.                         dst_width>>dst_pix->x_chroma_shift, dst_height>>dst_pix->y_chroma_shift);

  1788.         /* if yuv color space conversion is needed, we do it here on

  1789.            the destination image */

  1790.         if (dst_pix->color_type != src_pix->color_type) {

  1791.             const uint8_t *y_table, *c_table;

  1792.             if (dst_pix->color_type == FF_COLOR_YUV) {

  1793.                 y_table = y_jpeg_to_ccir;

  1794.                 c_table = c_jpeg_to_ccir;

  1795.             } else {

  1796.                 y_table = y_ccir_to_jpeg;

  1797.                 c_table = c_ccir_to_jpeg;

  1798.             }

  1799.             img_apply_table(dst->data[0], dst->linesize[0],

  1800.                             dst->data[0], dst->linesize[0],

  1801.                             dst_width, dst_height,

  1802.                             y_table);

  1803. 

  1804.             for(i = 1;i <= 2; i++)

  1805.                 img_apply_table(dst->data[i], dst->linesize[i],

  1806.                                 dst->data[i], dst->linesize[i],

  1807.                                 dst_width>>dst_pix->x_chroma_shift, 

  1808.                                 dst_height>>dst_pix->y_chroma_shift,

  1809.                                 c_table);

  1810.         }

  1811.         return 0;

  1812.     }

  1813.  no_chroma_filter:

  1814. 

  1815.     /* try to use an intermediate format */

  1816.     if (src_pix_fmt == PIX_FMT_YUV422 ||

  1817.         dst_pix_fmt == PIX_FMT_YUV422) {

  1818.         /* specific case: convert to YUV422P first */

  1819.         int_pix_fmt = PIX_FMT_YUV422P;

  1820.     } else if ((src_pix->color_type == FF_COLOR_GRAY &&

  1821.                 src_pix_fmt != PIX_FMT_GRAY8) || 

  1822.                (dst_pix->color_type == FF_COLOR_GRAY &&

  1823.                 dst_pix_fmt != PIX_FMT_GRAY8)) {

  1824.         /* gray8 is the normalized format */

  1825.         int_pix_fmt = PIX_FMT_GRAY8;

  1826.     } else if ((is_yuv_planar(src_pix) && 

  1827.                 src_pix_fmt != PIX_FMT_YUV444P &&

  1828.                 src_pix_fmt != PIX_FMT_YUVJ444P)) {

  1829.         /* yuv444 is the normalized format */

  1830.         if (src_pix->color_type == FF_COLOR_YUV_JPEG)

  1831.             int_pix_fmt = PIX_FMT_YUVJ444P;

  1832.         else

  1833.             int_pix_fmt = PIX_FMT_YUV444P;

  1834.     } else if ((is_yuv_planar(dst_pix) && 

  1835.                 dst_pix_fmt != PIX_FMT_YUV444P &&

  1836.                 dst_pix_fmt != PIX_FMT_YUVJ444P)) {

  1837.         /* yuv444 is the normalized format */

  1838.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG)

  1839.             int_pix_fmt = PIX_FMT_YUVJ444P;

  1840.         else

  1841.             int_pix_fmt = PIX_FMT_YUV444P;

  1842.     } else {

  1843.         /* the two formats are rgb or gray8 or yuv[j]444p */

  1844.         if (src_pix->is_alpha && dst_pix->is_alpha)

  1845.             int_pix_fmt = PIX_FMT_RGBA32;

  1846.         else

  1847.             int_pix_fmt = PIX_FMT_RGB24;

  1848.     }

  1849.     if (avpicture_alloc(tmp, int_pix_fmt, dst_width, dst_height) < 0)

  1850.         return -1;

  1851.     ret = -1;

  1852.     if (img_convert(tmp, int_pix_fmt,

  1853.                     src, src_pix_fmt, src_width, src_height) < 0)

  1854.         goto fail1;

  1855.     if (img_convert(dst, dst_pix_fmt,

  1856.                     tmp, int_pix_fmt, dst_width, dst_height) < 0)

  1857.         goto fail1;

  1858.     ret = 0;

  1859.  fail1:

  1860.     avpicture_free(tmp);

  1861.     return ret;

  1862. }

  1863. 

  1864. /* NOTE: we scan all the pixels to have an exact information */

  1865. static int get_alpha_info_pal8(AVPicture *src, int width, int height)

  1866. {

  1867.     const unsigned char *p;

  1868.     int src_wrap, ret, x, y;

  1869.     unsigned int a;

  1870.     uint32_t *palette = (uint32_t *)src->data[1];

  1871.     

  1872.     p = src->data[0];

  1873.     src_wrap = src->linesize[0] - width;

  1874.     ret = 0;

  1875.     for(y=0;y<height;y++) {

  1876.         for(x=0;x<width;x++) {

  1877.             a = palette[p[0]] >> 24;

  1878.             if (a == 0x00) {

  1879.                 ret |= FF_ALPHA_TRANSP;

  1880.             } else if (a != 0xff) {

  1881.                 ret |= FF_ALPHA_SEMI_TRANSP;

  1882.             }

  1883.             p++;

  1884.         }

  1885.         p += src_wrap;

  1886.     }

  1887.     return ret;

  1888. }

  1889. 

  1890. /**

  1891.  * Tell if an image really has transparent alpha values.

  1892.  * @return ored mask of FF_ALPHA_xxx constants

  1893.  */

  1894. int img_get_alpha_info(AVPicture *src, int pix_fmt, int width, int height)

  1895. {

  1896.     PixFmtInfo *pf = &pix_fmt_info[pix_fmt];

  1897.     int ret;

  1898. 

  1899.     pf = &pix_fmt_info[pix_fmt];

  1900.     /* no alpha can be represented in format */

  1901.     if (!pf->is_alpha)

  1902.         return 0;

  1903.     switch(pix_fmt) {

  1904.     case PIX_FMT_RGBA32:

  1905.         ret = get_alpha_info_rgba32(src, width, height);

  1906.         break;

  1907.     case PIX_FMT_RGB555:

  1908.         ret = get_alpha_info_rgb555(src, width, height);

  1909.         break;

  1910.     case PIX_FMT_PAL8:

  1911.         ret = get_alpha_info_pal8(src, width, height);

  1912.         break;

  1913.     default:

  1914.         /* we do not know, so everything is indicated */

  1915.         ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;

  1916.         break;

  1917.     }

  1918.     return ret;

  1919. }

  1920. 

  1921. #ifdef HAVE_MMX

  1922. #define DEINT_INPLACE_LINE_LUM \

  1923.                     movd_m2r(lum_m4[0],mm0);\

  1924.                     movd_m2r(lum_m3[0],mm1);\

  1925.                     movd_m2r(lum_m2[0],mm2);\

  1926.                     movd_m2r(lum_m1[0],mm3);\

  1927.                     movd_m2r(lum[0],mm4);\

  1928.                     punpcklbw_r2r(mm7,mm0);\

  1929.                     movd_r2m(mm2,lum_m4[0]);\

  1930.                     punpcklbw_r2r(mm7,mm1);\

  1931.                     punpcklbw_r2r(mm7,mm2);\

  1932.                     punpcklbw_r2r(mm7,mm3);\

  1933.                     punpcklbw_r2r(mm7,mm4);\

  1934.                     paddw_r2r(mm3,mm1);\

  1935.                     psllw_i2r(1,mm2);\

  1936.                     paddw_r2r(mm4,mm0);\

  1937.                     psllw_i2r(2,mm1);\

  1938.                     paddw_r2r(mm6,mm2);\

  1939.                     paddw_r2r(mm2,mm1);\

  1940.                     psubusw_r2r(mm0,mm1);\

  1941.                     psrlw_i2r(3,mm1);\

  1942.                     packuswb_r2r(mm7,mm1);\

  1943.                     movd_r2m(mm1,lum_m2[0]);

  1944. 

  1945. #define DEINT_LINE_LUM \

  1946.                     movd_m2r(lum_m4[0],mm0);\

  1947.                     movd_m2r(lum_m3[0],mm1);\

  1948.                     movd_m2r(lum_m2[0],mm2);\

  1949.                     movd_m2r(lum_m1[0],mm3);\

  1950.                     movd_m2r(lum[0],mm4);\

  1951.                     punpcklbw_r2r(mm7,mm0);\

  1952.                     punpcklbw_r2r(mm7,mm1);\

  1953.                     punpcklbw_r2r(mm7,mm2);\

  1954.                     punpcklbw_r2r(mm7,mm3);\

  1955.                     punpcklbw_r2r(mm7,mm4);\

  1956.                     paddw_r2r(mm3,mm1);\

  1957.                     psllw_i2r(1,mm2);\

  1958.                     paddw_r2r(mm4,mm0);\

  1959.                     psllw_i2r(2,mm1);\

  1960.                     paddw_r2r(mm6,mm2);\

  1961.                     paddw_r2r(mm2,mm1);\

  1962.                     psubusw_r2r(mm0,mm1);\

  1963.                     psrlw_i2r(3,mm1);\

  1964.                     packuswb_r2r(mm7,mm1);\

  1965.                     movd_r2m(mm1,dst[0]);

  1966. #endif

  1967. 

  1968. /* filter parameters: [-1 4 2 4 -1] // 8 */

  1969. static void deinterlace_line(uint8_t *dst, uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,

  1970.                                 int size)

  1971. {

  1972. #ifndef HAVE_MMX

  1973.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  1974.     int sum;

  1975. 

  1976.     for(;size > 0;size--) {

  1977.         sum = -lum_m4[0];

  1978.         sum += lum_m3[0] << 2;

  1979.         sum += lum_m2[0] << 1;

  1980.         sum += lum_m1[0] << 2;

  1981.         sum += -lum[0];

  1982.         dst[0] = cm[(sum + 4) >> 3];

  1983.         lum_m4++;

  1984.         lum_m3++;

  1985.         lum_m2++;

  1986.         lum_m1++;

  1987.         lum++;

  1988.         dst++;

  1989.     }

  1990. #else

  1991. 

  1992.     {

  1993.         mmx_t rounder;

  1994.         rounder.uw[0]=4;

  1995.         rounder.uw[1]=4;

  1996.         rounder.uw[2]=4;

  1997.         rounder.uw[3]=4;

  1998.         pxor_r2r(mm7,mm7);

  1999.         movq_m2r(rounder,mm6);

  2000.     }

  2001.     for (;size > 3; size-=4) {

  2002.         DEINT_LINE_LUM

  2003.         lum_m4+=4;

  2004.         lum_m3+=4;

  2005.         lum_m2+=4;

  2006.         lum_m1+=4;

  2007.         lum+=4;

  2008.         dst+=4;

  2009.     }

  2010. #endif

  2011. }

  2012. static void deinterlace_line_inplace(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,

  2013.                              int size)

  2014. {

  2015. #ifndef HAVE_MMX

  2016.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2017.     int sum;

  2018. 

  2019.     for(;size > 0;size--) {

  2020.         sum = -lum_m4[0];

  2021.         sum += lum_m3[0] << 2;

  2022.         sum += lum_m2[0] << 1;

  2023.         lum_m4[0]=lum_m2[0];

  2024.         sum += lum_m1[0] << 2;

  2025.         sum += -lum[0];

  2026.         lum_m2[0] = cm[(sum + 4) >> 3];

  2027.         lum_m4++;

  2028.         lum_m3++;

  2029.         lum_m2++;

  2030.         lum_m1++;

  2031.         lum++;

  2032.     }

  2033. #else

  2034. 

  2035.     {

  2036.         mmx_t rounder;

  2037.         rounder.uw[0]=4;

  2038.         rounder.uw[1]=4;

  2039.         rounder.uw[2]=4;

  2040.         rounder.uw[3]=4;

  2041.         pxor_r2r(mm7,mm7);

  2042.         movq_m2r(rounder,mm6);

  2043.     }

  2044.     for (;size > 3; size-=4) {

  2045.         DEINT_INPLACE_LINE_LUM

  2046.         lum_m4+=4;

  2047.         lum_m3+=4;

  2048.         lum_m2+=4;

  2049.         lum_m1+=4;

  2050.         lum+=4;

  2051.     }

  2052. #endif

  2053. }

  2054. 

  2055. /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The

  2056.    top field is copied as is, but the bottom field is deinterlaced

  2057.    against the top field. */

  2058. static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,

  2059.                                     uint8_t *src1, int src_wrap,

  2060.                                     int width, int height)

  2061. {

  2062.     uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;

  2063.     int y;

  2064. 

  2065.     src_m2 = src1;

  2066.     src_m1 = src1;

  2067.     src_0=&src_m1[src_wrap];

  2068.     src_p1=&src_0[src_wrap];

  2069.     src_p2=&src_p1[src_wrap];

  2070.     for(y=0;y<(height-2);y+=2) {

  2071.         memcpy(dst,src_m1,width);

  2072.         dst += dst_wrap;

  2073.         deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);

  2074.         src_m2 = src_0;

  2075.         src_m1 = src_p1;

  2076.         src_0 = src_p2;

  2077.         src_p1 += 2*src_wrap;

  2078.         src_p2 += 2*src_wrap;

  2079.         dst += dst_wrap;

  2080.     }

  2081.     memcpy(dst,src_m1,width);

  2082.     dst += dst_wrap;

  2083.     /* do last line */

  2084.     deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);

  2085. }

  2086. 

  2087. static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,

  2088.                                      int width, int height)

  2089. {

  2090.     uint8_t *src_m1, *src_0, *src_p1, *src_p2;

  2091.     int y;

  2092.     uint8_t *buf;

  2093.     buf = (uint8_t*)av_malloc(width);

  2094. 

  2095.     src_m1 = src1;

  2096.     memcpy(buf,src_m1,width);

  2097.     src_0=&src_m1[src_wrap];

  2098.     src_p1=&src_0[src_wrap];

  2099.     src_p2=&src_p1[src_wrap];

  2100.     for(y=0;y<(height-2);y+=2) {

  2101.         deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);

  2102.         src_m1 = src_p1;

  2103.         src_0 = src_p2;

  2104.         src_p1 += 2*src_wrap;

  2105.         src_p2 += 2*src_wrap;

  2106.     }

  2107.     /* do last line */

  2108.     deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);

  2109.     av_free(buf);

  2110. }

  2111. 

  2112. 

  2113. /* deinterlace - if not supported return -1 */

  2114. int avpicture_deinterlace(AVPicture *dst, AVPicture *src,

  2115.                           int pix_fmt, int width, int height)

  2116. {

  2117.     int i;

  2118. 

  2119.     if (pix_fmt != PIX_FMT_YUV420P &&

  2120.         pix_fmt != PIX_FMT_YUV422P &&

  2121.         pix_fmt != PIX_FMT_YUV444P)

  2122.         return -1;

  2123.     if ((width & 3) != 0 || (height & 3) != 0)

  2124.         return -1;

  2125. 

  2126.     for(i=0;i<3;i++) {

  2127.         if (i == 1) {

  2128.             switch(pix_fmt) {

  2129.             case PIX_FMT_YUV420P:

  2130.                 width >>= 1;

  2131.                 height >>= 1;

  2132.                 break;

  2133.             case PIX_FMT_YUV422P:

  2134.                 width >>= 1;

  2135.                 break;

  2136.             default:

  2137.                 break;

  2138.             }

  2139.         }

  2140.         if (src == dst) {

  2141.             deinterlace_bottom_field_inplace(src->data[i], src->linesize[i],

  2142.                                  width, height);

  2143.         } else {

  2144.             deinterlace_bottom_field(dst->data[i],dst->linesize[i],

  2145.                                         src->data[i], src->linesize[i],

  2146.                                         width, height);

  2147.         }

  2148.     }

  2149. #ifdef HAVE_MMX

  2150.     emms();

  2151. #endif

  2152.     return 0;

  2153. }

  2154. 

  2155. #undef FIX