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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_UYVY422] = {

  101.         .name = "uyvy422",

  102.         .nb_channels = 1,

  103.         .color_type = FF_COLOR_YUV,

  104.         .pixel_type = FF_PIXEL_PACKED,

  105.         .depth = 8,

  106.         .x_chroma_shift = 1, .y_chroma_shift = 0,

  107.     },

  108.     [PIX_FMT_YUV410P] = {

  109.         .name = "yuv410p",

  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 = 2,

  115.     },

  116.     [PIX_FMT_YUV411P] = {

  117.         .name = "yuv411p",

  118.         .nb_channels = 3,

  119.         .color_type = FF_COLOR_YUV,

  120.         .pixel_type = FF_PIXEL_PLANAR,

  121.         .depth = 8,

  122.         .x_chroma_shift = 2, .y_chroma_shift = 0,

  123.     },

  124. 

  125.     /* JPEG YUV */

  126.     [PIX_FMT_YUVJ420P] = {

  127.         .name = "yuvj420p",

  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 = 1, 

  133.     },

  134.     [PIX_FMT_YUVJ422P] = {

  135.         .name = "yuvj422p",

  136.         .nb_channels = 3,

  137.         .color_type = FF_COLOR_YUV_JPEG,

  138.         .pixel_type = FF_PIXEL_PLANAR,

  139.         .depth = 8,

  140.         .x_chroma_shift = 1, .y_chroma_shift = 0, 

  141.     },

  142.     [PIX_FMT_YUVJ444P] = {

  143.         .name = "yuvj444p",

  144.         .nb_channels = 3,

  145.         .color_type = FF_COLOR_YUV_JPEG,

  146.         .pixel_type = FF_PIXEL_PLANAR,

  147.         .depth = 8,

  148.         .x_chroma_shift = 0, .y_chroma_shift = 0, 

  149.     },

  150. 

  151.     /* RGB formats */

  152.     [PIX_FMT_RGB24] = {

  153.         .name = "rgb24",

  154.         .nb_channels = 3,

  155.         .color_type = FF_COLOR_RGB,

  156.         .pixel_type = FF_PIXEL_PACKED,

  157.         .depth = 8,

  158.         .x_chroma_shift = 0, .y_chroma_shift = 0,

  159.     },

  160.     [PIX_FMT_BGR24] = {

  161.         .name = "bgr24",

  162.         .nb_channels = 3,

  163.         .color_type = FF_COLOR_RGB,

  164.         .pixel_type = FF_PIXEL_PACKED,

  165.         .depth = 8,

  166.         .x_chroma_shift = 0, .y_chroma_shift = 0,

  167.     },

  168.     [PIX_FMT_RGBA32] = {

  169.         .name = "rgba32",

  170.         .nb_channels = 4, .is_alpha = 1,

  171.         .color_type = FF_COLOR_RGB,

  172.         .pixel_type = FF_PIXEL_PACKED,

  173.         .depth = 8,

  174.         .x_chroma_shift = 0, .y_chroma_shift = 0,

  175.     },

  176.     [PIX_FMT_RGB565] = {

  177.         .name = "rgb565",

  178.         .nb_channels = 3,

  179.         .color_type = FF_COLOR_RGB,

  180.         .pixel_type = FF_PIXEL_PACKED,

  181.         .depth = 5,

  182.         .x_chroma_shift = 0, .y_chroma_shift = 0,

  183.     },

  184.     [PIX_FMT_RGB555] = {

  185.         .name = "rgb555",

  186.         .nb_channels = 4, .is_alpha = 1,

  187.         .color_type = FF_COLOR_RGB,

  188.         .pixel_type = FF_PIXEL_PACKED,

  189.         .depth = 5,

  190.         .x_chroma_shift = 0, .y_chroma_shift = 0,

  191.     },

  192. 

  193.     /* gray / mono formats */

  194.     [PIX_FMT_GRAY8] = {

  195.         .name = "gray",

  196.         .nb_channels = 1,

  197.         .color_type = FF_COLOR_GRAY,

  198.         .pixel_type = FF_PIXEL_PLANAR,

  199.         .depth = 8,

  200.     },

  201.     [PIX_FMT_MONOWHITE] = {

  202.         .name = "monow",

  203.         .nb_channels = 1,

  204.         .color_type = FF_COLOR_GRAY,

  205.         .pixel_type = FF_PIXEL_PLANAR,

  206.         .depth = 1,

  207.     },

  208.     [PIX_FMT_MONOBLACK] = {

  209.         .name = "monob",

  210.         .nb_channels = 1,

  211.         .color_type = FF_COLOR_GRAY,

  212.         .pixel_type = FF_PIXEL_PLANAR,

  213.         .depth = 1,

  214.     },

  215. 

  216.     /* paletted formats */

  217.     [PIX_FMT_PAL8] = {

  218.         .name = "pal8",

  219.         .nb_channels = 4, .is_alpha = 1,

  220.         .color_type = FF_COLOR_RGB,

  221.         .pixel_type = FF_PIXEL_PALETTE,

  222.         .depth = 8,

  223.     },

  224. };

  225. 

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

  227. {

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

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

  230. }

  231. 

  232. const char *avcodec_get_pix_fmt_name(int pix_fmt)

  233. {

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

  235.         return "???";

  236.     else

  237.         return pix_fmt_info[pix_fmt].name;

  238. }

  239. 

  240. enum PixelFormat avcodec_get_pix_fmt(const char* name)

  241. {

  242.     int i; 

  243.     

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

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

  246. 	     break;

  247.     return i;

  248. }

  249. 

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

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

  252. 		   int pix_fmt, int width, int height)

  253. {

  254.     int size, w2, h2, size2;

  255.     PixFmtInfo *pinfo;

  256.     

  257.     pinfo = &pix_fmt_info[pix_fmt];

  258.     size = width * height;

  259.     switch(pix_fmt) {

  260.     case PIX_FMT_YUV420P:

  261.     case PIX_FMT_YUV422P:

  262.     case PIX_FMT_YUV444P:

  263.     case PIX_FMT_YUV410P:

  264.     case PIX_FMT_YUV411P:

  265.     case PIX_FMT_YUVJ420P:

  266.     case PIX_FMT_YUVJ422P:

  267.     case PIX_FMT_YUVJ444P:

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

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

  270.         size2 = w2 * h2;

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

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

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

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

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

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

  277.         return size + 2 * size2;

  278.     case PIX_FMT_RGB24:

  279.     case PIX_FMT_BGR24:

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

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

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

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

  284.         return size * 3;

  285.     case PIX_FMT_RGBA32:

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

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

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

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

  290.         return size * 4;

  291.     case PIX_FMT_RGB555:

  292.     case PIX_FMT_RGB565:

  293.     case PIX_FMT_YUV422:

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

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

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

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

  298.         return size * 2;

  299.     case PIX_FMT_UYVY422:

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

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

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

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

  304.         return size * 2;

  305.     case PIX_FMT_GRAY8:

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

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

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

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

  310.         return size;

  311.     case PIX_FMT_MONOWHITE:

  312.     case PIX_FMT_MONOBLACK:

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

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

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

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

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

  318.     case PIX_FMT_PAL8:

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

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

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

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

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

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

  325.         return size2 + 256 * 4;

  326.     default:

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

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

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

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

  331.         return -1;

  332.     }

  333. }

  334. 

  335. int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,

  336.                      unsigned char *dest, int dest_size)

  337. {

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

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

  340.     const unsigned char* s; 

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

  342. 

  343.     if (size > dest_size)

  344.         return -1;

  345. 

  346.     if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) {

  347.         if (pix_fmt == PIX_FMT_YUV422 || 

  348.             pix_fmt == PIX_FMT_UYVY422 || 

  349.             pix_fmt == PIX_FMT_RGB565 ||

  350.             pix_fmt == PIX_FMT_RGB555)

  351.             w = width * 2;

  352. 	else if (pix_fmt == PIX_FMT_PAL8)

  353. 	  w = width;

  354. 	else

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

  356. 	  

  357. 	data_planes = 1;

  358. 	h = height;

  359.     } else {

  360.         data_planes = pf->nb_channels;

  361. 	w = width;

  362. 	h = height;

  363.     }

  364.     

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

  366.          if (i == 1) {

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

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

  369. 	 }

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

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

  372. 	     memcpy(dest, s, w);

  373. 	     dest += w;

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

  375. 	 }

  376.     }

  377.     

  378.     if (pf->pixel_type == FF_PIXEL_PALETTE)

  379. 	memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);

  380.     

  381.     return size;

  382. }

  383. 

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

  385. {

  386.     AVPicture dummy_pict;

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

  388. }

  389. 

  390. /**

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

  392.  */

  393. int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,

  394.                              int has_alpha)

  395. {

  396.     const PixFmtInfo *pf, *ps;

  397.     int loss;

  398. 

  399.     ps = &pix_fmt_info[src_pix_fmt];

  400.     pf = &pix_fmt_info[dst_pix_fmt];

  401. 

  402.     /* compute loss */

  403.     loss = 0;

  404.     pf = &pix_fmt_info[dst_pix_fmt];

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

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

  407.         loss |= FF_LOSS_DEPTH;

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

  409.         pf->y_chroma_shift > ps->y_chroma_shift)

  410.         loss |= FF_LOSS_RESOLUTION;

  411.     switch(pf->color_type) {

  412.     case FF_COLOR_RGB:

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

  414.             ps->color_type != FF_COLOR_GRAY)

  415.             loss |= FF_LOSS_COLORSPACE;

  416.         break;

  417.     case FF_COLOR_GRAY:

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

  419.             loss |= FF_LOSS_COLORSPACE;

  420.         break;

  421.     case FF_COLOR_YUV:

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

  423.             loss |= FF_LOSS_COLORSPACE;

  424.         break;

  425.     case FF_COLOR_YUV_JPEG:

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

  427.             ps->color_type != FF_COLOR_YUV && 

  428.             ps->color_type != FF_COLOR_GRAY)

  429.             loss |= FF_LOSS_COLORSPACE;

  430.         break;

  431.     default:

  432.         /* fail safe test */

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

  434.             loss |= FF_LOSS_COLORSPACE;

  435.         break;

  436.     }

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

  438.         ps->color_type != FF_COLOR_GRAY)

  439.         loss |= FF_LOSS_CHROMA;

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

  441.         loss |= FF_LOSS_ALPHA;

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

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

  444.         loss |= FF_LOSS_COLORQUANT;

  445.     return loss;

  446. }

  447. 

  448. static int avg_bits_per_pixel(int pix_fmt)

  449. {

  450.     int bits;

  451.     const PixFmtInfo *pf;

  452. 

  453.     pf = &pix_fmt_info[pix_fmt];

  454.     switch(pf->pixel_type) {

  455.     case FF_PIXEL_PACKED:

  456.         switch(pix_fmt) {

  457.         case PIX_FMT_YUV422:

  458.         case PIX_FMT_UYVY422:

  459.         case PIX_FMT_RGB565:

  460.         case PIX_FMT_RGB555:

  461.             bits = 16;

  462.             break;

  463.         default:

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

  465.             break;

  466.         }

  467.         break;

  468.     case FF_PIXEL_PLANAR:

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

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

  471.         } else {

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

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

  474.         }

  475.         break;

  476.     case FF_PIXEL_PALETTE:

  477.         bits = 8;

  478.         break;

  479.     default:

  480.         bits = -1;

  481.         break;

  482.     }

  483.     return bits;

  484. }

  485. 

  486. static int avcodec_find_best_pix_fmt1(int pix_fmt_mask, 

  487.                                       int src_pix_fmt,

  488.                                       int has_alpha,

  489.                                       int loss_mask)

  490. {

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

  492. 

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

  494.     dst_pix_fmt = -1;

  495.     min_dist = 0x7fffffff;

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

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

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

  499.             if (loss == 0) {

  500.                 dist = avg_bits_per_pixel(i);

  501.                 if (dist < min_dist) {

  502.                     min_dist = dist;

  503.                     dst_pix_fmt = i;

  504.                 }

  505.             }

  506.         }

  507.     }

  508.     return dst_pix_fmt;

  509. }

  510. 

  511. /** 

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

  513.  */

  514. int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,

  515.                               int has_alpha, int *loss_ptr)

  516. {

  517.     int dst_pix_fmt, loss_mask, i;

  518.     static const int loss_mask_order[] = {

  519.         ~0, /* no loss first */

  520.         ~FF_LOSS_ALPHA,

  521.         ~FF_LOSS_RESOLUTION,

  522.         ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),

  523.         ~FF_LOSS_COLORQUANT,

  524.         ~FF_LOSS_DEPTH,

  525.         0,

  526.     };

  527. 

  528.     /* try with successive loss */

  529.     i = 0;

  530.     for(;;) {

  531.         loss_mask = loss_mask_order[i++];

  532.         dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt, 

  533.                                                  has_alpha, loss_mask);

  534.         if (dst_pix_fmt >= 0)

  535.             goto found;

  536.         if (loss_mask == 0)

  537.             break;

  538.     }

  539.     return -1;

  540.  found:

  541.     if (loss_ptr)

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

  543.     return dst_pix_fmt;

  544. }

  545. 

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

  547.                            const uint8_t *src, int src_wrap,

  548.                            int width, int height)

  549. {

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

  551.         memcpy(dst, src, width);

  552.         dst += dst_wrap;

  553.         src += src_wrap;

  554.     }

  555. }

  556. 

  557. /**

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

  559.  */

  560. void img_copy(AVPicture *dst, const AVPicture *src,

  561.               int pix_fmt, int width, int height)

  562. {

  563.     int bwidth, bits, i;

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

  565.     

  566.     pf = &pix_fmt_info[pix_fmt];

  567.     switch(pf->pixel_type) {

  568.     case FF_PIXEL_PACKED:

  569.         switch(pix_fmt) {

  570.         case PIX_FMT_YUV422:

  571.         case PIX_FMT_UYVY422:

  572.         case PIX_FMT_RGB565:

  573.         case PIX_FMT_RGB555:

  574.             bits = 16;

  575.             break;

  576.         default:

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

  578.             break;

  579.         }

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

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

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

  583.                        bwidth, height);

  584.         break;

  585.     case FF_PIXEL_PLANAR:

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

  587.             int w, h;

  588.             w = width;

  589.             h = height;

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

  591.                 w >>= pf->x_chroma_shift;

  592.                 h >>= pf->y_chroma_shift;

  593.             }

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

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

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

  597.                            bwidth, h);

  598.         }

  599.         break;

  600.     case FF_PIXEL_PALETTE:

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

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

  603.                        width, height);

  604.         /* copy the palette */

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

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

  607.                        4, 256);

  608.         break;

  609.     }

  610. }

  611. 

  612. /* XXX: totally non optimized */

  613. 

  614. static void yuv422_to_yuv420p(AVPicture *dst, const AVPicture *src,

  615.                               int width, int height)

  616. {

  617.     const uint8_t *p, *p1;

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

  619.     int w;

  620.  

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

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

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

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

  625. 

  626.     for(;height >= 1; height -= 2) {

  627.         p = p1;

  628.         lum = lum1;

  629.         cb = cb1;

  630.         cr = cr1;

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

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

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

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

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

  636.             p += 4;

  637.             lum += 2;

  638.             cb++;

  639.             cr++;

  640.         }

  641.         if (w) {

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

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

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

  645.             cb++;

  646.             cr++;

  647.         }

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

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

  650.         if (height>1) {

  651.             p = p1;

  652.             lum = lum1;

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

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

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

  656.                 p += 4;

  657.                 lum += 2;

  658.             }

  659.             if (w) {

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

  661.             }

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

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

  664.         }

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

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

  667.     }

  668. }

  669. 

  670. static void uyvy422_to_yuv420p(AVPicture *dst, const AVPicture *src,

  671.                               int width, int height)

  672. {

  673.     const uint8_t *p, *p1;

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

  675.     int w;

  676.  

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

  678.     

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

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

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

  682. 

  683.     for(;height >= 1; height -= 2) {

  684.         p = p1;

  685.         lum = lum1;

  686.         cb = cb1;

  687.         cr = cr1;

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

  689.             lum[0] = p[1];

  690.             cb[0] = p[0];

  691.             lum[1] = p[3];

  692.             cr[0] = p[2];

  693.             p += 4;

  694.             lum += 2;

  695.             cb++;

  696.             cr++;

  697.         }

  698.         if (w) {

  699.             lum[0] = p[1];

  700.             cb[0] = p[0];

  701.             cr[0] = p[2];

  702.             cb++;

  703.             cr++;

  704.         }

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

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

  707.         if (height>1) {

  708.             p = p1;

  709.             lum = lum1;

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

  711.                 lum[0] = p[1];

  712.                 lum[1] = p[3];

  713.                 p += 4;

  714.                 lum += 2;

  715.             }

  716.             if (w) {

  717.                 lum[0] = p[1];

  718.             }

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

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

  721.         }

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

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

  724.     }

  725. }

  726. 

  727. 

  728. static void uyvy422_to_yuv422p(AVPicture *dst, const AVPicture *src,

  729.                               int width, int height)

  730. {

  731.     const uint8_t *p, *p1;

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

  733.     int w;

  734. 

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

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

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

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

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

  740.         p = p1;

  741.         lum = lum1;

  742.         cb = cb1;

  743.         cr = cr1;

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

  745.             lum[0] = p[1];

  746.             cb[0] = p[0];

  747.             lum[1] = p[3];

  748.             cr[0] = p[2];

  749.             p += 4;

  750.             lum += 2;

  751.             cb++;

  752.             cr++;

  753.         }

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

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

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

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

  758.     }

  759. }

  760. 

  761. 

  762. static void yuv422_to_yuv422p(AVPicture *dst, const AVPicture *src,

  763.                               int width, int height)

  764. {

  765.     const uint8_t *p, *p1;

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

  767.     int w;

  768. 

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

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

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

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

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

  774.         p = p1;

  775.         lum = lum1;

  776.         cb = cb1;

  777.         cr = cr1;

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

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

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

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

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

  783.             p += 4;

  784.             lum += 2;

  785.             cb++;

  786.             cr++;

  787.         }

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

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

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

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

  792.     }

  793. }

  794. 

  795. static void yuv422p_to_yuv422(AVPicture *dst, const AVPicture *src,

  796.                               int width, int height)

  797. {

  798.     uint8_t *p, *p1;

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

  800.     int w;

  801. 

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

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

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

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

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

  807.         p = p1;

  808.         lum = lum1;

  809.         cb = cb1;

  810.         cr = cr1;

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

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

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

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

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

  816.             p += 4;

  817.             lum += 2;

  818.             cb++;

  819.             cr++;

  820.         }

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

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

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

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

  825.     }

  826. }

  827. 

  828. static void yuv422p_to_uyvy422(AVPicture *dst, const AVPicture *src,

  829.                               int width, int height)

  830. {

  831.     uint8_t *p, *p1;

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

  833.     int w;

  834. 

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

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

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

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

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

  840.         p = p1;

  841.         lum = lum1;

  842.         cb = cb1;

  843.         cr = cr1;

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

  845.             p[1] = lum[0];

  846.             p[0] = cb[0];

  847.             p[3] = lum[1];

  848.             p[2] = cr[0];

  849.             p += 4;

  850.             lum += 2;

  851.             cb++;

  852.             cr++;

  853.         }

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

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

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

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

  858.     }

  859. }

  860. 

  861. 

  862. 

  863. #define SCALEBITS 10

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

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

  866. 

  867. #define YUV_TO_RGB1_CCIR(cb1, cr1)\

  868. {\

  869.     cb = (cb1) - 128;\

  870.     cr = (cr1) - 128;\

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

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

  873.             ONE_HALF;\

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

  875. }

  876. 

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

  878. {\

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

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

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

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

  883. }

  884. 

  885. #define YUV_TO_RGB1(cb1, cr1)\

  886. {\

  887.     cb = (cb1) - 128;\

  888.     cr = (cr1) - 128;\

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

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

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

  892. }

  893. 

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

  895. {\

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

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

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

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

  900. }

  901. 

  902. #define Y_CCIR_TO_JPEG(y)\

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

  904. 

  905. #define Y_JPEG_TO_CCIR(y)\

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

  907. 

  908. #define C_CCIR_TO_JPEG(y)\

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

  910. 

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

  912. static inline int C_JPEG_TO_CCIR(int y) {

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

  914.     if (y < 16)

  915. 	y = 16;

  916.     return y;

  917. }

  918. 

  919. 

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

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

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

  923. 

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

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

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

  927. 

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

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

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

  931. 

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

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

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

  935. 

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

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

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

  939. 

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

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

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

  943. 

  944. static uint8_t y_ccir_to_jpeg[256];

  945. static uint8_t y_jpeg_to_ccir[256];

  946. static uint8_t c_ccir_to_jpeg[256];

  947. static uint8_t c_jpeg_to_ccir[256];

  948. 

  949. /* init various conversion tables */

  950. static void img_convert_init(void)

  951. {

  952.     int i;

  953.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  954. 

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

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

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

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

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

  960.     }

  961. }

  962. 

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

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

  965.                             const uint8_t *src, int src_wrap,

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

  967. {

  968.     int n;

  969.     const uint8_t *s;

  970.     uint8_t *d;

  971.     const uint8_t *table;

  972. 

  973.     table = table1;

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

  975.         s = src;

  976.         d = dst;

  977.         n = width;

  978.         while (n >= 4) {

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

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

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

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

  983.             d += 4;

  984.             s += 4;

  985.             n -= 4;

  986.         }

  987.         while (n > 0) {

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

  989.             d++;

  990.             s++;

  991.             n--;

  992.         }

  993.         dst += dst_wrap;

  994.         src += src_wrap;

  995.     }

  996. }

  997. 

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

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

  1000. 

  1001. /* 4x1 -> 1x1 */

  1002. static void shrink41(uint8_t *dst, int dst_wrap, 

  1003.                      const uint8_t *src, int src_wrap,

  1004.                      int width, int height)

  1005. {

  1006.     int w;

  1007.     const uint8_t *s;

  1008.     uint8_t *d;

  1009. 

  1010.     for(;height > 0; height--) {

  1011.         s = src;

  1012.         d = dst;

  1013.         for(w = width;w > 0; w--) {

  1014.             d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2;

  1015.             s += 4;

  1016.             d++;

  1017.         }

  1018.         src += src_wrap;

  1019.         dst += dst_wrap;

  1020.     }

  1021. }

  1022. 

  1023. /* 2x1 -> 1x1 */

  1024. static void shrink21(uint8_t *dst, int dst_wrap, 

  1025.                      const uint8_t *src, int src_wrap,

  1026.                      int width, int height)

  1027. {

  1028.     int w;

  1029.     const uint8_t *s;

  1030.     uint8_t *d;

  1031. 

  1032.     for(;height > 0; height--) {

  1033.         s = src;

  1034.         d = dst;

  1035.         for(w = width;w > 0; w--) {

  1036.             d[0] = (s[0] + s[1]) >> 1;

  1037.             s += 2;

  1038.             d++;

  1039.         }

  1040.         src += src_wrap;

  1041.         dst += dst_wrap;

  1042.     }

  1043. }

  1044. 

  1045. /* 1x2 -> 1x1 */

  1046. static void shrink12(uint8_t *dst, int dst_wrap, 

  1047.                      const uint8_t *src, int src_wrap,

  1048.                      int width, int height)

  1049. {

  1050.     int w;

  1051.     uint8_t *d;

  1052.     const uint8_t *s1, *s2;

  1053. 

  1054.     for(;height > 0; height--) {

  1055.         s1 = src;

  1056.         s2 = s1 + src_wrap;

  1057.         d = dst;

  1058.         for(w = width;w >= 4; w-=4) {

  1059.             d[0] = (s1[0] + s2[0]) >> 1;

  1060.             d[1] = (s1[1] + s2[1]) >> 1;

  1061.             d[2] = (s1[2] + s2[2]) >> 1;

  1062.             d[3] = (s1[3] + s2[3]) >> 1;

  1063.             s1 += 4;

  1064.             s2 += 4;

  1065.             d += 4;

  1066.         }

  1067.         for(;w > 0; w--) {

  1068.             d[0] = (s1[0] + s2[0]) >> 1;

  1069.             s1++;

  1070.             s2++;

  1071.             d++;

  1072.         }

  1073.         src += 2 * src_wrap;

  1074.         dst += dst_wrap;

  1075.     }

  1076. }

  1077. 

  1078. /* 2x2 -> 1x1 */

  1079. static void shrink22(uint8_t *dst, int dst_wrap, 

  1080.                      const uint8_t *src, int src_wrap,

  1081.                      int width, int height)

  1082. {

  1083.     int w;

  1084.     const uint8_t *s1, *s2;

  1085.     uint8_t *d;

  1086. 

  1087.     for(;height > 0; height--) {

  1088.         s1 = src;

  1089.         s2 = s1 + src_wrap;

  1090.         d = dst;

  1091.         for(w = width;w >= 4; w-=4) {

  1092.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  1093.             d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;

  1094.             d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;

  1095.             d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;

  1096.             s1 += 8;

  1097.             s2 += 8;

  1098.             d += 4;

  1099.         }

  1100.         for(;w > 0; w--) {

  1101.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  1102.             s1 += 2;

  1103.             s2 += 2;

  1104.             d++;

  1105.         }

  1106.         src += 2 * src_wrap;

  1107.         dst += dst_wrap;

  1108.     }

  1109. }

  1110. 

  1111. /* 4x4 -> 1x1 */

  1112. static void shrink44(uint8_t *dst, int dst_wrap, 

  1113.                      const uint8_t *src, int src_wrap,

  1114.                      int width, int height)

  1115. {

  1116.     int w;

  1117.     const uint8_t *s1, *s2, *s3, *s4;

  1118.     uint8_t *d;

  1119. 

  1120.     for(;height > 0; height--) {

  1121.         s1 = src;

  1122.         s2 = s1 + src_wrap;

  1123.         s3 = s2 + src_wrap;

  1124.         s4 = s3 + src_wrap;

  1125.         d = dst;

  1126.         for(w = width;w > 0; w--) {

  1127.             d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +

  1128.                     s2[0] + s2[1] + s2[2] + s2[3] +

  1129.                     s3[0] + s3[1] + s3[2] + s3[3] +

  1130.                     s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;

  1131.             s1 += 4;

  1132.             s2 += 4;

  1133.             s3 += 4;

  1134.             s4 += 4;

  1135.             d++;

  1136.         }

  1137.         src += 4 * src_wrap;

  1138.         dst += dst_wrap;

  1139.     }

  1140. }

  1141. 

  1142. static void grow21_line(uint8_t *dst, const uint8_t *src,

  1143.                         int width)

  1144. {

  1145.     int w;

  1146.     const uint8_t *s1;

  1147.     uint8_t *d;

  1148. 

  1149.     s1 = src;

  1150.     d = dst;

  1151.     for(w = width;w >= 4; w-=4) {

  1152.         d[1] = d[0] = s1[0];

  1153.         d[3] = d[2] = s1[1];

  1154.         s1 += 2;

  1155.         d += 4;

  1156.     }

  1157.     for(;w >= 2; w -= 2) {

  1158.         d[1] = d[0] = s1[0];

  1159.         s1 ++;

  1160.         d += 2;

  1161.     }

  1162.     /* only needed if width is not a multiple of two */

  1163.     /* XXX: veryfy that */

  1164.     if (w) {

  1165.         d[0] = s1[0];

  1166.     }

  1167. }

  1168. 

  1169. static void grow41_line(uint8_t *dst, const uint8_t *src,

  1170.                         int width)

  1171. {

  1172.     int w, v;

  1173.     const uint8_t *s1;

  1174.     uint8_t *d;

  1175. 

  1176.     s1 = src;

  1177.     d = dst;

  1178.     for(w = width;w >= 4; w-=4) {

  1179.         v = s1[0];

  1180.         d[0] = v;

  1181.         d[1] = v;

  1182.         d[2] = v;

  1183.         d[3] = v;

  1184.         s1 ++;

  1185.         d += 4;

  1186.     }

  1187. }

  1188. 

  1189. /* 1x1 -> 2x1 */

  1190. static void grow21(uint8_t *dst, int dst_wrap,

  1191.                    const uint8_t *src, int src_wrap,

  1192.                    int width, int height)

  1193. {

  1194.     for(;height > 0; height--) {

  1195.         grow21_line(dst, src, width);

  1196.         src += src_wrap;

  1197.         dst += dst_wrap;

  1198.     }

  1199. }

  1200. 

  1201. /* 1x1 -> 2x2 */

  1202. static void grow22(uint8_t *dst, int dst_wrap,

  1203.                    const uint8_t *src, int src_wrap,

  1204.                    int width, int height)

  1205. {

  1206.     for(;height > 0; height--) {

  1207.         grow21_line(dst, src, width);

  1208.         if (height%2)

  1209.             src += src_wrap;

  1210.         dst += dst_wrap;

  1211.     }

  1212. }

  1213. 

  1214. /* 1x1 -> 4x1 */

  1215. static void grow41(uint8_t *dst, int dst_wrap,

  1216.                    const uint8_t *src, int src_wrap,

  1217.                    int width, int height)

  1218. {

  1219.     for(;height > 0; height--) {

  1220.         grow41_line(dst, src, width);

  1221.         src += src_wrap;

  1222.         dst += dst_wrap;

  1223.     }

  1224. }

  1225. 

  1226. /* 1x1 -> 4x4 */

  1227. static void grow44(uint8_t *dst, int dst_wrap,

  1228.                    const uint8_t *src, int src_wrap,

  1229.                    int width, int height)

  1230. {

  1231.     for(;height > 0; height--) {

  1232.         grow41_line(dst, src, width);

  1233.         if ((height & 3) == 1)

  1234.             src += src_wrap;

  1235.         dst += dst_wrap;

  1236.     }

  1237. }

  1238. 

  1239. /* 1x2 -> 2x1 */

  1240. static void conv411(uint8_t *dst, int dst_wrap, 

  1241.                     const uint8_t *src, int src_wrap,

  1242.                     int width, int height)

  1243. {

  1244.     int w, c;

  1245.     const uint8_t *s1, *s2;

  1246.     uint8_t *d;

  1247. 

  1248.     width>>=1;

  1249. 

  1250.     for(;height > 0; height--) {

  1251.         s1 = src;

  1252.         s2 = src + src_wrap;

  1253.         d = dst;

  1254.         for(w = width;w > 0; w--) {

  1255.             c = (s1[0] + s2[0]) >> 1;

  1256.             d[0] = c;

  1257.             d[1] = c;

  1258.             s1++;

  1259.             s2++;

  1260.             d += 2;

  1261.         }

  1262.         src += src_wrap * 2;

  1263.         dst += dst_wrap;

  1264.     }

  1265. }

  1266. 

  1267. /* XXX: add jpeg quantize code */

  1268. 

  1269. #define TRANSP_INDEX (6*6*6)

  1270. 

  1271. /* this is maybe slow, but allows for extensions */

  1272. static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)

  1273. {

  1274.     return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));

  1275. }

  1276. 

  1277. static void build_rgb_palette(uint8_t *palette, int has_alpha)

  1278. {

  1279.     uint32_t *pal;

  1280.     static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };

  1281.     int i, r, g, b;

  1282. 

  1283.     pal = (uint32_t *)palette;

  1284.     i = 0;

  1285.     for(r = 0; r < 6; r++) {

  1286.         for(g = 0; g < 6; g++) {

  1287.             for(b = 0; b < 6; b++) {

  1288.                 pal[i++] = (0xff << 24) | (pal_value[r] << 16) | 

  1289.                     (pal_value[g] << 8) | pal_value[b];

  1290.             }

  1291.         }

  1292.     }

  1293.     if (has_alpha)

  1294.         pal[i++] = 0;

  1295.     while (i < 256)

  1296.         pal[i++] = 0xff000000;

  1297. }

  1298. 

  1299. /* copy bit n to bits 0 ... n - 1 */

  1300. static inline unsigned int bitcopy_n(unsigned int a, int n)

  1301. {

  1302.     int mask;

  1303.     mask = (1 << n) - 1;

  1304.     return (a & (0xff & ~mask)) | ((-((a >> n) & 1)) & mask);

  1305. }

  1306. 

  1307. /* rgb555 handling */

  1308. 

  1309. #define RGB_NAME rgb555

  1310. 

  1311. #define RGB_IN(r, g, b, s)\

  1312. {\

  1313.     unsigned int v = ((const uint16_t *)(s))[0];\

  1314.     r = bitcopy_n(v >> (10 - 3), 3);\

  1315.     g = bitcopy_n(v >> (5 - 3), 3);\

  1316.     b = bitcopy_n(v << 3, 3);\

  1317. }

  1318. 

  1319. #define RGBA_IN(r, g, b, a, s)\

  1320. {\

  1321.     unsigned int v = ((const uint16_t *)(s))[0];\

  1322.     r = bitcopy_n(v >> (10 - 3), 3);\

  1323.     g = bitcopy_n(v >> (5 - 3), 3);\

  1324.     b = bitcopy_n(v << 3, 3);\

  1325.     a = (-(v >> 15)) & 0xff;\

  1326. }

  1327. 

  1328. #define RGBA_OUT(d, r, g, b, a)\

  1329. {\

  1330.     ((uint16_t *)(d))[0] = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3) | \

  1331.                            ((a << 8) & 0x8000);\

  1332. }

  1333. 

  1334. #define BPP 2

  1335. 

  1336. #include "imgconvert_template.h"

  1337. 

  1338. /* rgb565 handling */

  1339. 

  1340. #define RGB_NAME rgb565

  1341. 

  1342. #define RGB_IN(r, g, b, s)\

  1343. {\

  1344.     unsigned int v = ((const uint16_t *)(s))[0];\

  1345.     r = bitcopy_n(v >> (11 - 3), 3);\

  1346.     g = bitcopy_n(v >> (5 - 2), 2);\

  1347.     b = bitcopy_n(v << 3, 3);\

  1348. }

  1349. 

  1350. #define RGB_OUT(d, r, g, b)\

  1351. {\

  1352.     ((uint16_t *)(d))[0] = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);\

  1353. }

  1354. 

  1355. #define BPP 2

  1356. 

  1357. #include "imgconvert_template.h"

  1358. 

  1359. /* bgr24 handling */

  1360. 

  1361. #define RGB_NAME bgr24

  1362. 

  1363. #define RGB_IN(r, g, b, s)\

  1364. {\

  1365.     b = (s)[0];\

  1366.     g = (s)[1];\

  1367.     r = (s)[2];\

  1368. }

  1369. 

  1370. #define RGB_OUT(d, r, g, b)\

  1371. {\

  1372.     (d)[0] = b;\

  1373.     (d)[1] = g;\

  1374.     (d)[2] = r;\

  1375. }

  1376. 

  1377. #define BPP 3

  1378. 

  1379. #include "imgconvert_template.h"

  1380. 

  1381. #undef RGB_IN

  1382. #undef RGB_OUT

  1383. #undef BPP

  1384. 

  1385. /* rgb24 handling */

  1386. 

  1387. #define RGB_NAME rgb24

  1388. #define FMT_RGB24

  1389. 

  1390. #define RGB_IN(r, g, b, s)\

  1391. {\

  1392.     r = (s)[0];\

  1393.     g = (s)[1];\

  1394.     b = (s)[2];\

  1395. }

  1396. 

  1397. #define RGB_OUT(d, r, g, b)\

  1398. {\

  1399.     (d)[0] = r;\

  1400.     (d)[1] = g;\

  1401.     (d)[2] = b;\

  1402. }

  1403. 

  1404. #define BPP 3

  1405. 

  1406. #include "imgconvert_template.h"

  1407. 

  1408. /* rgba32 handling */

  1409. 

  1410. #define RGB_NAME rgba32

  1411. #define FMT_RGBA32

  1412. 

  1413. #define RGB_IN(r, g, b, s)\

  1414. {\

  1415.     unsigned int v = ((const uint32_t *)(s))[0];\

  1416.     r = (v >> 16) & 0xff;\

  1417.     g = (v >> 8) & 0xff;\

  1418.     b = v & 0xff;\

  1419. }

  1420. 

  1421. #define RGBA_IN(r, g, b, a, s)\

  1422. {\

  1423.     unsigned int v = ((const uint32_t *)(s))[0];\

  1424.     a = (v >> 24) & 0xff;\

  1425.     r = (v >> 16) & 0xff;\

  1426.     g = (v >> 8) & 0xff;\

  1427.     b = v & 0xff;\

  1428. }

  1429. 

  1430. #define RGBA_OUT(d, r, g, b, a)\

  1431. {\

  1432.     ((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;\

  1433. }

  1434. 

  1435. #define BPP 4

  1436. 

  1437. #include "imgconvert_template.h"

  1438. 

  1439. static void mono_to_gray(AVPicture *dst, const AVPicture *src,

  1440.                          int width, int height, int xor_mask)

  1441. {

  1442.     const unsigned char *p;

  1443.     unsigned char *q;

  1444.     int v, dst_wrap, src_wrap;

  1445.     int y, w;

  1446. 

  1447.     p = src->data[0];

  1448.     src_wrap = src->linesize[0] - ((width + 7) >> 3);

  1449. 

  1450.     q = dst->data[0];

  1451.     dst_wrap = dst->linesize[0] - width;

  1452.     for(y=0;y<height;y++) {

  1453.         w = width; 

  1454.         while (w >= 8) {

  1455.             v = *p++ ^ xor_mask;

  1456.             q[0] = -(v >> 7);

  1457.             q[1] = -((v >> 6) & 1);

  1458.             q[2] = -((v >> 5) & 1);

  1459.             q[3] = -((v >> 4) & 1);

  1460.             q[4] = -((v >> 3) & 1);

  1461.             q[5] = -((v >> 2) & 1);

  1462.             q[6] = -((v >> 1) & 1);

  1463.             q[7] = -((v >> 0) & 1);

  1464.             w -= 8;

  1465.             q += 8;

  1466.         }

  1467.         if (w > 0) {

  1468.             v = *p++ ^ xor_mask;

  1469.             do {

  1470.                 q[0] = -((v >> 7) & 1);

  1471.                 q++;

  1472.                 v <<= 1;

  1473.             } while (--w);

  1474.         }

  1475.         p += src_wrap;

  1476.         q += dst_wrap;

  1477.     }

  1478. }

  1479. 

  1480. static void monowhite_to_gray(AVPicture *dst, const AVPicture *src,

  1481.                                int width, int height)

  1482. {

  1483.     mono_to_gray(dst, src, width, height, 0xff);

  1484. }

  1485. 

  1486. static void monoblack_to_gray(AVPicture *dst, const AVPicture *src,

  1487.                                int width, int height)

  1488. {

  1489.     mono_to_gray(dst, src, width, height, 0x00);

  1490. }

  1491. 

  1492. static void gray_to_mono(AVPicture *dst, const AVPicture *src,

  1493.                          int width, int height, int xor_mask)

  1494. {

  1495.     int n;

  1496.     const uint8_t *s;

  1497.     uint8_t *d;

  1498.     int j, b, v, n1, src_wrap, dst_wrap, y;

  1499. 

  1500.     s = src->data[0];

  1501.     src_wrap = src->linesize[0] - width;

  1502. 

  1503.     d = dst->data[0];

  1504.     dst_wrap = dst->linesize[0] - ((width + 7) >> 3);

  1505. 

  1506.     for(y=0;y<height;y++) {

  1507.         n = width;

  1508.         while (n >= 8) {

  1509.             v = 0;

  1510.             for(j=0;j<8;j++) {

  1511.                 b = s[0];

  1512.                 s++;

  1513.                 v = (v << 1) | (b >> 7);

  1514.             }

  1515.             d[0] = v ^ xor_mask;

  1516.             d++;

  1517.             n -= 8;

  1518.         }

  1519.         if (n > 0) {

  1520.             n1 = n;

  1521.             v = 0;

  1522.             while (n > 0) {

  1523.                 b = s[0];

  1524.                 s++;

  1525.                 v = (v << 1) | (b >> 7);

  1526.                 n--;

  1527.             }

  1528.             d[0] = (v << (8 - (n1 & 7))) ^ xor_mask;

  1529.             d++;

  1530.         }

  1531.         s += src_wrap;

  1532.         d += dst_wrap;

  1533.     }

  1534. }

  1535. 

  1536. static void gray_to_monowhite(AVPicture *dst, const AVPicture *src,

  1537.                               int width, int height)

  1538. {

  1539.     gray_to_mono(dst, src, width, height, 0xff);

  1540. }

  1541. 

  1542. static void gray_to_monoblack(AVPicture *dst, const AVPicture *src,

  1543.                               int width, int height)

  1544. {

  1545.     gray_to_mono(dst, src, width, height, 0x00);

  1546. }

  1547. 

  1548. typedef struct ConvertEntry {

  1549.     void (*convert)(AVPicture *dst,

  1550. 		    const AVPicture *src, int width, int height);

  1551. } ConvertEntry;

  1552. 

  1553. /* Add each new convertion function in this table. In order to be able

  1554.    to convert from any format to any format, the following constraints

  1555.    must be satisfied:

  1556. 

  1557.    - all FF_COLOR_RGB formats must convert to and from PIX_FMT_RGB24 

  1558. 

  1559.    - all FF_COLOR_GRAY formats must convert to and from PIX_FMT_GRAY8

  1560. 

  1561.    - all FF_COLOR_RGB formats with alpha must convert to and from PIX_FMT_RGBA32

  1562. 

  1563.    - PIX_FMT_YUV444P and PIX_FMT_YUVJ444P must convert to and from

  1564.      PIX_FMT_RGB24.

  1565. 

  1566.    - PIX_FMT_422 must convert to and from PIX_FMT_422P.

  1567. 

  1568.    The other conversion functions are just optimisations for common cases.

  1569. */

  1570. static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {

  1571.     [PIX_FMT_YUV420P] = {

  1572.         [PIX_FMT_RGB555] = { 

  1573.             .convert = yuv420p_to_rgb555

  1574.         },

  1575.         [PIX_FMT_RGB565] = { 

  1576.             .convert = yuv420p_to_rgb565

  1577.         },

  1578.         [PIX_FMT_BGR24] = { 

  1579.             .convert = yuv420p_to_bgr24

  1580.         },

  1581.         [PIX_FMT_RGB24] = { 

  1582.             .convert = yuv420p_to_rgb24

  1583.         },

  1584.         [PIX_FMT_RGBA32] = { 

  1585.             .convert = yuv420p_to_rgba32

  1586.         },

  1587.     },

  1588.     [PIX_FMT_YUV422P] = { 

  1589.         [PIX_FMT_YUV422] = { 

  1590.             .convert = yuv422p_to_yuv422,

  1591.         },

  1592.         [PIX_FMT_UYVY422] = { 

  1593.             .convert = yuv422p_to_uyvy422,

  1594.         },

  1595.     },

  1596.     [PIX_FMT_YUV444P] = { 

  1597.         [PIX_FMT_RGB24] = { 

  1598.             .convert = yuv444p_to_rgb24

  1599.         },

  1600.     },

  1601.     [PIX_FMT_YUVJ420P] = {

  1602.         [PIX_FMT_RGB555] = { 

  1603.             .convert = yuvj420p_to_rgb555

  1604.         },

  1605.         [PIX_FMT_RGB565] = { 

  1606.             .convert = yuvj420p_to_rgb565

  1607.         },

  1608.         [PIX_FMT_BGR24] = { 

  1609.             .convert = yuvj420p_to_bgr24

  1610.         },

  1611.         [PIX_FMT_RGB24] = { 

  1612.             .convert = yuvj420p_to_rgb24

  1613.         },

  1614.         [PIX_FMT_RGBA32] = { 

  1615.             .convert = yuvj420p_to_rgba32

  1616.         },

  1617.     },

  1618.     [PIX_FMT_YUVJ444P] = { 

  1619.         [PIX_FMT_RGB24] = { 

  1620.             .convert = yuvj444p_to_rgb24

  1621.         },

  1622.     },

  1623.     [PIX_FMT_YUV422] = { 

  1624.         [PIX_FMT_YUV420P] = { 

  1625.             .convert = yuv422_to_yuv420p,

  1626.         },

  1627.         [PIX_FMT_YUV422P] = { 

  1628.             .convert = yuv422_to_yuv422p,

  1629.         },

  1630.     },

  1631.     [PIX_FMT_UYVY422] = { 

  1632.         [PIX_FMT_YUV420P] = { 

  1633.             .convert = uyvy422_to_yuv420p,

  1634.         },

  1635.         [PIX_FMT_YUV422P] = { 

  1636.             .convert = uyvy422_to_yuv422p,

  1637.         },

  1638.     },

  1639.     [PIX_FMT_RGB24] = {

  1640.         [PIX_FMT_YUV420P] = { 

  1641.             .convert = rgb24_to_yuv420p

  1642.         },

  1643.         [PIX_FMT_RGB565] = { 

  1644.             .convert = rgb24_to_rgb565

  1645.         },

  1646.         [PIX_FMT_RGB555] = { 

  1647.             .convert = rgb24_to_rgb555

  1648.         },

  1649.         [PIX_FMT_RGBA32] = { 

  1650.             .convert = rgb24_to_rgba32

  1651.         },

  1652.         [PIX_FMT_BGR24] = { 

  1653.             .convert = rgb24_to_bgr24

  1654.         },

  1655.         [PIX_FMT_GRAY8] = { 

  1656.             .convert = rgb24_to_gray

  1657.         },

  1658.         [PIX_FMT_PAL8] = {

  1659.             .convert = rgb24_to_pal8

  1660.         },

  1661.         [PIX_FMT_YUV444P] = { 

  1662.             .convert = rgb24_to_yuv444p

  1663.         },

  1664.         [PIX_FMT_YUVJ420P] = { 

  1665.             .convert = rgb24_to_yuvj420p

  1666.         },

  1667.         [PIX_FMT_YUVJ444P] = { 

  1668.             .convert = rgb24_to_yuvj444p

  1669.         },

  1670.     },

  1671.     [PIX_FMT_RGBA32] = {

  1672.         [PIX_FMT_RGB24] = { 

  1673.             .convert = rgba32_to_rgb24

  1674.         },

  1675.         [PIX_FMT_RGB555] = { 

  1676.             .convert = rgba32_to_rgb555

  1677.         },

  1678.         [PIX_FMT_PAL8] = { 

  1679.             .convert = rgba32_to_pal8

  1680.         },

  1681.         [PIX_FMT_YUV420P] = { 

  1682.             .convert = rgba32_to_yuv420p

  1683.         },

  1684.         [PIX_FMT_GRAY8] = { 

  1685.             .convert = rgba32_to_gray

  1686.         },

  1687.     },

  1688.     [PIX_FMT_BGR24] = {

  1689.         [PIX_FMT_RGB24] = { 

  1690.             .convert = bgr24_to_rgb24

  1691.         },

  1692.         [PIX_FMT_YUV420P] = { 

  1693.             .convert = bgr24_to_yuv420p

  1694.         },

  1695.         [PIX_FMT_GRAY8] = { 

  1696.             .convert = bgr24_to_gray

  1697.         },

  1698.     },

  1699.     [PIX_FMT_RGB555] = {

  1700.         [PIX_FMT_RGB24] = { 

  1701.             .convert = rgb555_to_rgb24

  1702.         },

  1703.         [PIX_FMT_RGBA32] = { 

  1704.             .convert = rgb555_to_rgba32

  1705.         },

  1706.         [PIX_FMT_YUV420P] = { 

  1707.             .convert = rgb555_to_yuv420p

  1708.         },

  1709.         [PIX_FMT_GRAY8] = { 

  1710.             .convert = rgb555_to_gray

  1711.         },

  1712.     },

  1713.     [PIX_FMT_RGB565] = {

  1714.         [PIX_FMT_RGB24] = { 

  1715.             .convert = rgb565_to_rgb24

  1716.         },

  1717.         [PIX_FMT_YUV420P] = { 

  1718.             .convert = rgb565_to_yuv420p

  1719.         },

  1720.         [PIX_FMT_GRAY8] = { 

  1721.             .convert = rgb565_to_gray

  1722.         },

  1723.     },

  1724.     [PIX_FMT_GRAY8] = {

  1725.         [PIX_FMT_RGB555] = { 

  1726.             .convert = gray_to_rgb555

  1727.         },

  1728.         [PIX_FMT_RGB565] = { 

  1729.             .convert = gray_to_rgb565

  1730.         },

  1731.         [PIX_FMT_RGB24] = { 

  1732.             .convert = gray_to_rgb24

  1733.         },

  1734.         [PIX_FMT_BGR24] = { 

  1735.             .convert = gray_to_bgr24

  1736.         },

  1737.         [PIX_FMT_RGBA32] = { 

  1738.             .convert = gray_to_rgba32

  1739.         },

  1740.         [PIX_FMT_MONOWHITE] = { 

  1741.             .convert = gray_to_monowhite

  1742.         },

  1743.         [PIX_FMT_MONOBLACK] = { 

  1744.             .convert = gray_to_monoblack

  1745.         },

  1746.     },

  1747.     [PIX_FMT_MONOWHITE] = {

  1748.         [PIX_FMT_GRAY8] = { 

  1749.             .convert = monowhite_to_gray

  1750.         },

  1751.     },

  1752.     [PIX_FMT_MONOBLACK] = {

  1753.         [PIX_FMT_GRAY8] = { 

  1754.             .convert = monoblack_to_gray

  1755.         },

  1756.     },

  1757.     [PIX_FMT_PAL8] = {

  1758.         [PIX_FMT_RGB555] = { 

  1759.             .convert = pal8_to_rgb555

  1760.         },

  1761.         [PIX_FMT_RGB565] = { 

  1762.             .convert = pal8_to_rgb565

  1763.         },

  1764.         [PIX_FMT_BGR24] = { 

  1765.             .convert = pal8_to_bgr24

  1766.         },

  1767.         [PIX_FMT_RGB24] = { 

  1768.             .convert = pal8_to_rgb24

  1769.         },

  1770.         [PIX_FMT_RGBA32] = { 

  1771.             .convert = pal8_to_rgba32

  1772.         },

  1773.     },

  1774. };

  1775. 

  1776. int avpicture_alloc(AVPicture *picture,

  1777.                            int pix_fmt, int width, int height)

  1778. {

  1779.     unsigned int size;

  1780.     void *ptr;

  1781. 

  1782.     size = avpicture_get_size(pix_fmt, width, height);

  1783.     ptr = av_malloc(size);

  1784.     if (!ptr)

  1785.         goto fail;

  1786.     avpicture_fill(picture, ptr, pix_fmt, width, height);

  1787.     return 0;

  1788.  fail:

  1789.     memset(picture, 0, sizeof(AVPicture));

  1790.     return -1;

  1791. }

  1792. 

  1793. void avpicture_free(AVPicture *picture)

  1794. {

  1795.     av_free(picture->data[0]);

  1796. }

  1797. 

  1798. /* return true if yuv planar */

  1799. static inline int is_yuv_planar(PixFmtInfo *ps)

  1800. {

  1801.     return (ps->color_type == FF_COLOR_YUV ||

  1802.             ps->color_type == FF_COLOR_YUV_JPEG) && 

  1803.         ps->pixel_type == FF_PIXEL_PLANAR;

  1804. }

  1805. 

  1806. /* XXX: always use linesize. Return -1 if not supported */

  1807. int img_convert(AVPicture *dst, int dst_pix_fmt,

  1808.                 const AVPicture *src, int src_pix_fmt, 

  1809.                 int src_width, int src_height)

  1810. {

  1811.     static int inited;

  1812.     int i, ret, dst_width, dst_height, int_pix_fmt;

  1813.     PixFmtInfo *src_pix, *dst_pix;

  1814.     ConvertEntry *ce;

  1815.     AVPicture tmp1, *tmp = &tmp1;

  1816. 

  1817.     if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB ||

  1818.         dst_pix_fmt < 0 || dst_pix_fmt >= PIX_FMT_NB)

  1819.         return -1;

  1820.     if (src_width <= 0 || src_height <= 0)

  1821.         return 0;

  1822. 

  1823.     if (!inited) {

  1824.         inited = 1;

  1825.         img_convert_init();

  1826.     }

  1827. 

  1828.     dst_width = src_width;

  1829.     dst_height = src_height;

  1830. 

  1831.     dst_pix = &pix_fmt_info[dst_pix_fmt];

  1832.     src_pix = &pix_fmt_info[src_pix_fmt];

  1833.     if (src_pix_fmt == dst_pix_fmt) {

  1834.         /* no conversion needed: just copy */

  1835.         img_copy(dst, src, dst_pix_fmt, dst_width, dst_height);

  1836.         return 0;

  1837.     }

  1838. 

  1839.     ce = &convert_table[src_pix_fmt][dst_pix_fmt];

  1840.     if (ce->convert) {

  1841.         /* specific conversion routine */

  1842.         ce->convert(dst, src, dst_width, dst_height);

  1843.         return 0;

  1844.     }

  1845. 

  1846.     /* gray to YUV */

  1847.     if (is_yuv_planar(dst_pix) &&

  1848.         src_pix_fmt == PIX_FMT_GRAY8) {

  1849.         int w, h, y;

  1850.         uint8_t *d;

  1851. 

  1852.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG) {

  1853.             img_copy_plane(dst->data[0], dst->linesize[0],

  1854.                      src->data[0], src->linesize[0],

  1855.                      dst_width, dst_height);

  1856.         } else {

  1857.             img_apply_table(dst->data[0], dst->linesize[0],

  1858.                             src->data[0], src->linesize[0],

  1859.                             dst_width, dst_height,

  1860.                             y_jpeg_to_ccir);

  1861.         }

  1862.         /* fill U and V with 128 */

  1863.         w = dst_width;

  1864.         h = dst_height;

  1865.         w >>= dst_pix->x_chroma_shift;

  1866.         h >>= dst_pix->y_chroma_shift;

  1867.         for(i = 1; i <= 2; i++) {

  1868.             d = dst->data[i];

  1869.             for(y = 0; y< h; y++) {

  1870.                 memset(d, 128, w);

  1871.                 d += dst->linesize[i];

  1872.             }

  1873.         }

  1874.         return 0;

  1875.     }

  1876. 

  1877.     /* YUV to gray */

  1878.     if (is_yuv_planar(src_pix) && 

  1879.         dst_pix_fmt == PIX_FMT_GRAY8) {

  1880.         if (src_pix->color_type == FF_COLOR_YUV_JPEG) {

  1881.             img_copy_plane(dst->data[0], dst->linesize[0],

  1882.                      src->data[0], src->linesize[0],

  1883.                      dst_width, dst_height);

  1884.         } else {

  1885.             img_apply_table(dst->data[0], dst->linesize[0],

  1886.                             src->data[0], src->linesize[0],

  1887.                             dst_width, dst_height,

  1888.                             y_ccir_to_jpeg);

  1889.         }

  1890.         return 0;

  1891.     }

  1892. 

  1893.     /* YUV to YUV planar */

  1894.     if (is_yuv_planar(dst_pix) && is_yuv_planar(src_pix)) {

  1895.         int x_shift, y_shift, w, h, xy_shift;

  1896.         void (*resize_func)(uint8_t *dst, int dst_wrap, 

  1897.                             const uint8_t *src, int src_wrap,

  1898.                             int width, int height);

  1899. 

  1900.         /* compute chroma size of the smallest dimensions */

  1901.         w = dst_width;

  1902.         h = dst_height;

  1903.         if (dst_pix->x_chroma_shift >= src_pix->x_chroma_shift)

  1904.             w >>= dst_pix->x_chroma_shift;

  1905.         else

  1906.             w >>= src_pix->x_chroma_shift;

  1907.         if (dst_pix->y_chroma_shift >= src_pix->y_chroma_shift)

  1908.             h >>= dst_pix->y_chroma_shift;

  1909.         else

  1910.             h >>= src_pix->y_chroma_shift;

  1911. 

  1912.         x_shift = (dst_pix->x_chroma_shift - src_pix->x_chroma_shift);

  1913.         y_shift = (dst_pix->y_chroma_shift - src_pix->y_chroma_shift);

  1914.         xy_shift = ((x_shift & 0xf) << 4) | (y_shift & 0xf);

  1915.         /* there must be filters for conversion at least from and to

  1916.            YUV444 format */

  1917.         switch(xy_shift) {

  1918.         case 0x00:

  1919.             resize_func = img_copy_plane;

  1920.             break;

  1921.         case 0x10:

  1922.             resize_func = shrink21;

  1923.             break;

  1924.         case 0x20:

  1925.             resize_func = shrink41;

  1926.             break;

  1927.         case 0x01:

  1928.             resize_func = shrink12;

  1929.             break;

  1930.         case 0x11:

  1931.             resize_func = shrink22;

  1932.             break;

  1933.         case 0x22:

  1934.             resize_func = shrink44;

  1935.             break;

  1936.         case 0xf0:

  1937.             resize_func = grow21;

  1938.             break;

  1939.         case 0xe0:

  1940.             resize_func = grow41;

  1941.             break;

  1942.         case 0xff:

  1943.             resize_func = grow22;

  1944.             break;

  1945.         case 0xee:

  1946.             resize_func = grow44;

  1947.             break;

  1948.         case 0xf1:

  1949.             resize_func = conv411;

  1950.             break;

  1951.         default:

  1952.             /* currently not handled */

  1953.             goto no_chroma_filter;

  1954.         }

  1955. 

  1956.         img_copy_plane(dst->data[0], dst->linesize[0],

  1957.                        src->data[0], src->linesize[0],

  1958.                        dst_width, dst_height);

  1959. 

  1960.         for(i = 1;i <= 2; i++)

  1961.             resize_func(dst->data[i], dst->linesize[i],

  1962.                         src->data[i], src->linesize[i],

  1963.                         dst_width>>dst_pix->x_chroma_shift, dst_height>>dst_pix->y_chroma_shift);

  1964.         /* if yuv color space conversion is needed, we do it here on

  1965.            the destination image */

  1966.         if (dst_pix->color_type != src_pix->color_type) {

  1967.             const uint8_t *y_table, *c_table;

  1968.             if (dst_pix->color_type == FF_COLOR_YUV) {

  1969.                 y_table = y_jpeg_to_ccir;

  1970.                 c_table = c_jpeg_to_ccir;

  1971.             } else {

  1972.                 y_table = y_ccir_to_jpeg;

  1973.                 c_table = c_ccir_to_jpeg;

  1974.             }

  1975.             img_apply_table(dst->data[0], dst->linesize[0],

  1976.                             dst->data[0], dst->linesize[0],

  1977.                             dst_width, dst_height,

  1978.                             y_table);

  1979. 

  1980.             for(i = 1;i <= 2; i++)

  1981.                 img_apply_table(dst->data[i], dst->linesize[i],

  1982.                                 dst->data[i], dst->linesize[i],

  1983.                                 dst_width>>dst_pix->x_chroma_shift, 

  1984.                                 dst_height>>dst_pix->y_chroma_shift,

  1985.                                 c_table);

  1986.         }

  1987.         return 0;

  1988.     }

  1989.  no_chroma_filter:

  1990. 

  1991.     /* try to use an intermediate format */

  1992.     if (src_pix_fmt == PIX_FMT_YUV422 ||

  1993.         dst_pix_fmt == PIX_FMT_YUV422) {

  1994.         /* specific case: convert to YUV422P first */

  1995.         int_pix_fmt = PIX_FMT_YUV422P;

  1996.     } else if (src_pix_fmt == PIX_FMT_UYVY422 ||

  1997.         dst_pix_fmt == PIX_FMT_UYVY422) {

  1998.         /* specific case: convert to YUV422P first */

  1999.         int_pix_fmt = PIX_FMT_YUV422P;

  2000.     } else if ((src_pix->color_type == FF_COLOR_GRAY &&

  2001.                 src_pix_fmt != PIX_FMT_GRAY8) || 

  2002.                (dst_pix->color_type == FF_COLOR_GRAY &&

  2003.                 dst_pix_fmt != PIX_FMT_GRAY8)) {

  2004.         /* gray8 is the normalized format */

  2005.         int_pix_fmt = PIX_FMT_GRAY8;

  2006.     } else if ((is_yuv_planar(src_pix) && 

  2007.                 src_pix_fmt != PIX_FMT_YUV444P &&

  2008.                 src_pix_fmt != PIX_FMT_YUVJ444P)) {

  2009.         /* yuv444 is the normalized format */

  2010.         if (src_pix->color_type == FF_COLOR_YUV_JPEG)

  2011.             int_pix_fmt = PIX_FMT_YUVJ444P;

  2012.         else

  2013.             int_pix_fmt = PIX_FMT_YUV444P;

  2014.     } else if ((is_yuv_planar(dst_pix) && 

  2015.                 dst_pix_fmt != PIX_FMT_YUV444P &&

  2016.                 dst_pix_fmt != PIX_FMT_YUVJ444P)) {

  2017.         /* yuv444 is the normalized format */

  2018.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG)

  2019.             int_pix_fmt = PIX_FMT_YUVJ444P;

  2020.         else

  2021.             int_pix_fmt = PIX_FMT_YUV444P;

  2022.     } else {

  2023.         /* the two formats are rgb or gray8 or yuv[j]444p */

  2024.         if (src_pix->is_alpha && dst_pix->is_alpha)

  2025.             int_pix_fmt = PIX_FMT_RGBA32;

  2026.         else

  2027.             int_pix_fmt = PIX_FMT_RGB24;

  2028.     }

  2029.     if (avpicture_alloc(tmp, int_pix_fmt, dst_width, dst_height) < 0)

  2030.         return -1;

  2031.     ret = -1;

  2032.     if (img_convert(tmp, int_pix_fmt,

  2033.                     src, src_pix_fmt, src_width, src_height) < 0)

  2034.         goto fail1;

  2035.     if (img_convert(dst, dst_pix_fmt,

  2036.                     tmp, int_pix_fmt, dst_width, dst_height) < 0)

  2037.         goto fail1;

  2038.     ret = 0;

  2039.  fail1:

  2040.     avpicture_free(tmp);

  2041.     return ret;

  2042. }

  2043. 

  2044. /* NOTE: we scan all the pixels to have an exact information */

  2045. static int get_alpha_info_pal8(const AVPicture *src, int width, int height)

  2046. {

  2047.     const unsigned char *p;

  2048.     int src_wrap, ret, x, y;

  2049.     unsigned int a;

  2050.     uint32_t *palette = (uint32_t *)src->data[1];

  2051.     

  2052.     p = src->data[0];

  2053.     src_wrap = src->linesize[0] - width;

  2054.     ret = 0;

  2055.     for(y=0;y<height;y++) {

  2056.         for(x=0;x<width;x++) {

  2057.             a = palette[p[0]] >> 24;

  2058.             if (a == 0x00) {

  2059.                 ret |= FF_ALPHA_TRANSP;

  2060.             } else if (a != 0xff) {

  2061.                 ret |= FF_ALPHA_SEMI_TRANSP;

  2062.             }

  2063.             p++;

  2064.         }

  2065.         p += src_wrap;

  2066.     }

  2067.     return ret;

  2068. }

  2069. 

  2070. /**

  2071.  * Tell if an image really has transparent alpha values.

  2072.  * @return ored mask of FF_ALPHA_xxx constants

  2073.  */

  2074. int img_get_alpha_info(const AVPicture *src,

  2075. 		       int pix_fmt, int width, int height)

  2076. {

  2077.     PixFmtInfo *pf = &pix_fmt_info[pix_fmt];

  2078.     int ret;

  2079. 

  2080.     pf = &pix_fmt_info[pix_fmt];

  2081.     /* no alpha can be represented in format */

  2082.     if (!pf->is_alpha)

  2083.         return 0;

  2084.     switch(pix_fmt) {

  2085.     case PIX_FMT_RGBA32:

  2086.         ret = get_alpha_info_rgba32(src, width, height);

  2087.         break;

  2088.     case PIX_FMT_RGB555:

  2089.         ret = get_alpha_info_rgb555(src, width, height);

  2090.         break;

  2091.     case PIX_FMT_PAL8:

  2092.         ret = get_alpha_info_pal8(src, width, height);

  2093.         break;

  2094.     default:

  2095.         /* we do not know, so everything is indicated */

  2096.         ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;

  2097.         break;

  2098.     }

  2099.     return ret;

  2100. }

  2101. 

  2102. #ifdef HAVE_MMX

  2103. #define DEINT_INPLACE_LINE_LUM \

  2104.                     movd_m2r(lum_m4[0],mm0);\

  2105.                     movd_m2r(lum_m3[0],mm1);\

  2106.                     movd_m2r(lum_m2[0],mm2);\

  2107.                     movd_m2r(lum_m1[0],mm3);\

  2108.                     movd_m2r(lum[0],mm4);\

  2109.                     punpcklbw_r2r(mm7,mm0);\

  2110.                     movd_r2m(mm2,lum_m4[0]);\

  2111.                     punpcklbw_r2r(mm7,mm1);\

  2112.                     punpcklbw_r2r(mm7,mm2);\

  2113.                     punpcklbw_r2r(mm7,mm3);\

  2114.                     punpcklbw_r2r(mm7,mm4);\

  2115.                     paddw_r2r(mm3,mm1);\

  2116.                     psllw_i2r(1,mm2);\

  2117.                     paddw_r2r(mm4,mm0);\

  2118.                     psllw_i2r(2,mm1);\

  2119.                     paddw_r2r(mm6,mm2);\

  2120.                     paddw_r2r(mm2,mm1);\

  2121.                     psubusw_r2r(mm0,mm1);\

  2122.                     psrlw_i2r(3,mm1);\

  2123.                     packuswb_r2r(mm7,mm1);\

  2124.                     movd_r2m(mm1,lum_m2[0]);

  2125. 

  2126. #define DEINT_LINE_LUM \

  2127.                     movd_m2r(lum_m4[0],mm0);\

  2128.                     movd_m2r(lum_m3[0],mm1);\

  2129.                     movd_m2r(lum_m2[0],mm2);\

  2130.                     movd_m2r(lum_m1[0],mm3);\

  2131.                     movd_m2r(lum[0],mm4);\

  2132.                     punpcklbw_r2r(mm7,mm0);\

  2133.                     punpcklbw_r2r(mm7,mm1);\

  2134.                     punpcklbw_r2r(mm7,mm2);\

  2135.                     punpcklbw_r2r(mm7,mm3);\

  2136.                     punpcklbw_r2r(mm7,mm4);\

  2137.                     paddw_r2r(mm3,mm1);\

  2138.                     psllw_i2r(1,mm2);\

  2139.                     paddw_r2r(mm4,mm0);\

  2140.                     psllw_i2r(2,mm1);\

  2141.                     paddw_r2r(mm6,mm2);\

  2142.                     paddw_r2r(mm2,mm1);\

  2143.                     psubusw_r2r(mm0,mm1);\

  2144.                     psrlw_i2r(3,mm1);\

  2145.                     packuswb_r2r(mm7,mm1);\

  2146.                     movd_r2m(mm1,dst[0]);

  2147. #endif

  2148. 

  2149. /* filter parameters: [-1 4 2 4 -1] // 8 */

  2150. static void deinterlace_line(uint8_t *dst, 

  2151. 			     const uint8_t *lum_m4, const uint8_t *lum_m3, 

  2152. 			     const uint8_t *lum_m2, const uint8_t *lum_m1, 

  2153. 			     const uint8_t *lum,

  2154. 			     int size)

  2155. {

  2156. #ifndef HAVE_MMX

  2157.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2158.     int sum;

  2159. 

  2160.     for(;size > 0;size--) {

  2161.         sum = -lum_m4[0];

  2162.         sum += lum_m3[0] << 2;

  2163.         sum += lum_m2[0] << 1;

  2164.         sum += lum_m1[0] << 2;

  2165.         sum += -lum[0];

  2166.         dst[0] = cm[(sum + 4) >> 3];

  2167.         lum_m4++;

  2168.         lum_m3++;

  2169.         lum_m2++;

  2170.         lum_m1++;

  2171.         lum++;

  2172.         dst++;

  2173.     }

  2174. #else

  2175. 

  2176.     {

  2177.         mmx_t rounder;

  2178.         rounder.uw[0]=4;

  2179.         rounder.uw[1]=4;

  2180.         rounder.uw[2]=4;

  2181.         rounder.uw[3]=4;

  2182.         pxor_r2r(mm7,mm7);

  2183.         movq_m2r(rounder,mm6);

  2184.     }

  2185.     for (;size > 3; size-=4) {

  2186.         DEINT_LINE_LUM

  2187.         lum_m4+=4;

  2188.         lum_m3+=4;

  2189.         lum_m2+=4;

  2190.         lum_m1+=4;

  2191.         lum+=4;

  2192.         dst+=4;

  2193.     }

  2194. #endif

  2195. }

  2196. static void deinterlace_line_inplace(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,

  2197.                              int size)

  2198. {

  2199. #ifndef HAVE_MMX

  2200.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2201.     int sum;

  2202. 

  2203.     for(;size > 0;size--) {

  2204.         sum = -lum_m4[0];

  2205.         sum += lum_m3[0] << 2;

  2206.         sum += lum_m2[0] << 1;

  2207.         lum_m4[0]=lum_m2[0];

  2208.         sum += lum_m1[0] << 2;

  2209.         sum += -lum[0];

  2210.         lum_m2[0] = cm[(sum + 4) >> 3];

  2211.         lum_m4++;

  2212.         lum_m3++;

  2213.         lum_m2++;

  2214.         lum_m1++;

  2215.         lum++;

  2216.     }

  2217. #else

  2218. 

  2219.     {

  2220.         mmx_t rounder;

  2221.         rounder.uw[0]=4;

  2222.         rounder.uw[1]=4;

  2223.         rounder.uw[2]=4;

  2224.         rounder.uw[3]=4;

  2225.         pxor_r2r(mm7,mm7);

  2226.         movq_m2r(rounder,mm6);

  2227.     }

  2228.     for (;size > 3; size-=4) {

  2229.         DEINT_INPLACE_LINE_LUM

  2230.         lum_m4+=4;

  2231.         lum_m3+=4;

  2232.         lum_m2+=4;

  2233.         lum_m1+=4;

  2234.         lum+=4;

  2235.     }

  2236. #endif

  2237. }

  2238. 

  2239. /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The

  2240.    top field is copied as is, but the bottom field is deinterlaced

  2241.    against the top field. */

  2242. static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,

  2243.                                     const uint8_t *src1, int src_wrap,

  2244.                                     int width, int height)

  2245. {

  2246.     const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;

  2247.     int y;

  2248. 

  2249.     src_m2 = src1;

  2250.     src_m1 = src1;

  2251.     src_0=&src_m1[src_wrap];

  2252.     src_p1=&src_0[src_wrap];

  2253.     src_p2=&src_p1[src_wrap];

  2254.     for(y=0;y<(height-2);y+=2) {

  2255.         memcpy(dst,src_m1,width);

  2256.         dst += dst_wrap;

  2257.         deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);

  2258.         src_m2 = src_0;

  2259.         src_m1 = src_p1;

  2260.         src_0 = src_p2;

  2261.         src_p1 += 2*src_wrap;

  2262.         src_p2 += 2*src_wrap;

  2263.         dst += dst_wrap;

  2264.     }

  2265.     memcpy(dst,src_m1,width);

  2266.     dst += dst_wrap;

  2267.     /* do last line */

  2268.     deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);

  2269. }

  2270. 

  2271. static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,

  2272. 					     int width, int height)

  2273. {

  2274.     uint8_t *src_m1, *src_0, *src_p1, *src_p2;

  2275.     int y;

  2276.     uint8_t *buf;

  2277.     buf = (uint8_t*)av_malloc(width);

  2278. 

  2279.     src_m1 = src1;

  2280.     memcpy(buf,src_m1,width);

  2281.     src_0=&src_m1[src_wrap];

  2282.     src_p1=&src_0[src_wrap];

  2283.     src_p2=&src_p1[src_wrap];

  2284.     for(y=0;y<(height-2);y+=2) {

  2285.         deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);

  2286.         src_m1 = src_p1;

  2287.         src_0 = src_p2;

  2288.         src_p1 += 2*src_wrap;

  2289.         src_p2 += 2*src_wrap;

  2290.     }

  2291.     /* do last line */

  2292.     deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);

  2293.     av_free(buf);

  2294. }

  2295. 

  2296. 

  2297. /* deinterlace - if not supported return -1 */

  2298. int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,

  2299.                           int pix_fmt, int width, int height)

  2300. {

  2301.     int i;

  2302. 

  2303.     if (pix_fmt != PIX_FMT_YUV420P &&

  2304.         pix_fmt != PIX_FMT_YUV422P &&

  2305.         pix_fmt != PIX_FMT_YUV444P &&

  2306. 	pix_fmt != PIX_FMT_YUV411P)

  2307.         return -1;

  2308.     if ((width & 3) != 0 || (height & 3) != 0)

  2309.         return -1;

  2310. 

  2311.     for(i=0;i<3;i++) {

  2312.         if (i == 1) {

  2313.             switch(pix_fmt) {

  2314.             case PIX_FMT_YUV420P:

  2315.                 width >>= 1;

  2316.                 height >>= 1;

  2317.                 break;

  2318.             case PIX_FMT_YUV422P:

  2319.                 width >>= 1;

  2320.                 break;

  2321.             case PIX_FMT_YUV411P:

  2322.                 width >>= 2;

  2323.                 break;

  2324.             default:

  2325.                 break;

  2326.             }

  2327.         }

  2328.         if (src == dst) {

  2329.             deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],

  2330.                                  width, height);

  2331.         } else {

  2332.             deinterlace_bottom_field(dst->data[i],dst->linesize[i],

  2333.                                         src->data[i], src->linesize[i],

  2334.                                         width, height);

  2335.         }

  2336.     }

  2337. #ifdef HAVE_MMX

  2338.     emms();

  2339. #endif

  2340.     return 0;

  2341. }

  2342. 

  2343. #undef FIX