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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.     [PIX_FMT_XVMC_MPEG2_MC] = {

  225.         .name = "xvmcmc",

  226.     },

  227.     [PIX_FMT_XVMC_MPEG2_IDCT] = {

  228.         .name = "xvmcidct",

  229.     },

  230. };

  231. 

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

  233. {

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

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

  236. }

  237. 

  238. const char *avcodec_get_pix_fmt_name(int pix_fmt)

  239. {

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

  241.         return "???";

  242.     else

  243.         return pix_fmt_info[pix_fmt].name;

  244. }

  245. 

  246. enum PixelFormat avcodec_get_pix_fmt(const char* name)

  247. {

  248.     int i; 

  249.     

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

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

  252. 	     break;

  253.     return i;

  254. }

  255. 

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

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

  258. 		   int pix_fmt, int width, int height)

  259. {

  260.     int size, w2, h2, size2;

  261.     PixFmtInfo *pinfo;

  262.     

  263.     pinfo = &pix_fmt_info[pix_fmt];

  264.     size = width * height;

  265.     switch(pix_fmt) {

  266.     case PIX_FMT_YUV420P:

  267.     case PIX_FMT_YUV422P:

  268.     case PIX_FMT_YUV444P:

  269.     case PIX_FMT_YUV410P:

  270.     case PIX_FMT_YUV411P:

  271.     case PIX_FMT_YUVJ420P:

  272.     case PIX_FMT_YUVJ422P:

  273.     case PIX_FMT_YUVJ444P:

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

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

  276.         size2 = w2 * h2;

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

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

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

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

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

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

  283.         return size + 2 * size2;

  284.     case PIX_FMT_RGB24:

  285.     case PIX_FMT_BGR24:

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

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

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

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

  290.         return size * 3;

  291.     case PIX_FMT_RGBA32:

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

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

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

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

  296.         return size * 4;

  297.     case PIX_FMT_RGB555:

  298.     case PIX_FMT_RGB565:

  299.     case PIX_FMT_YUV422:

  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_UYVY422:

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

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

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

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

  310.         return size * 2;

  311.     case PIX_FMT_GRAY8:

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

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

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

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

  316.         return size;

  317.     case PIX_FMT_MONOWHITE:

  318.     case PIX_FMT_MONOBLACK:

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

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

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

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

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

  324.     case PIX_FMT_PAL8:

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

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

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

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

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

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

  331.         return size2 + 256 * 4;

  332.     default:

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

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

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

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

  337.         return -1;

  338.     }

  339. }

  340. 

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

  342.                      unsigned char *dest, int dest_size)

  343. {

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

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

  346.     const unsigned char* s; 

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

  348. 

  349.     if (size > dest_size)

  350.         return -1;

  351. 

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

  353.         if (pix_fmt == PIX_FMT_YUV422 || 

  354.             pix_fmt == PIX_FMT_UYVY422 || 

  355.             pix_fmt == PIX_FMT_RGB565 ||

  356.             pix_fmt == PIX_FMT_RGB555)

  357.             w = width * 2;

  358. 	else if (pix_fmt == PIX_FMT_PAL8)

  359. 	  w = width;

  360. 	else

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

  362. 	  

  363. 	data_planes = 1;

  364. 	h = height;

  365.     } else {

  366.         data_planes = pf->nb_channels;

  367. 	w = width;

  368. 	h = height;

  369.     }

  370.     

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

  372.          if (i == 1) {

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

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

  375. 	 }

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

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

  378. 	     memcpy(dest, s, w);

  379. 	     dest += w;

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

  381. 	 }

  382.     }

  383.     

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

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

  386.     

  387.     return size;

  388. }

  389. 

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

  391. {

  392.     AVPicture dummy_pict;

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

  394. }

  395. 

  396. /**

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

  398.  */

  399. int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,

  400.                              int has_alpha)

  401. {

  402.     const PixFmtInfo *pf, *ps;

  403.     int loss;

  404. 

  405.     ps = &pix_fmt_info[src_pix_fmt];

  406.     pf = &pix_fmt_info[dst_pix_fmt];

  407. 

  408.     /* compute loss */

  409.     loss = 0;

  410.     pf = &pix_fmt_info[dst_pix_fmt];

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

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

  413.         loss |= FF_LOSS_DEPTH;

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

  415.         pf->y_chroma_shift > ps->y_chroma_shift)

  416.         loss |= FF_LOSS_RESOLUTION;

  417.     switch(pf->color_type) {

  418.     case FF_COLOR_RGB:

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

  420.             ps->color_type != FF_COLOR_GRAY)

  421.             loss |= FF_LOSS_COLORSPACE;

  422.         break;

  423.     case FF_COLOR_GRAY:

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

  425.             loss |= FF_LOSS_COLORSPACE;

  426.         break;

  427.     case FF_COLOR_YUV:

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

  429.             loss |= FF_LOSS_COLORSPACE;

  430.         break;

  431.     case FF_COLOR_YUV_JPEG:

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

  433.             ps->color_type != FF_COLOR_YUV && 

  434.             ps->color_type != FF_COLOR_GRAY)

  435.             loss |= FF_LOSS_COLORSPACE;

  436.         break;

  437.     default:

  438.         /* fail safe test */

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

  440.             loss |= FF_LOSS_COLORSPACE;

  441.         break;

  442.     }

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

  444.         ps->color_type != FF_COLOR_GRAY)

  445.         loss |= FF_LOSS_CHROMA;

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

  447.         loss |= FF_LOSS_ALPHA;

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

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

  450.         loss |= FF_LOSS_COLORQUANT;

  451.     return loss;

  452. }

  453. 

  454. static int avg_bits_per_pixel(int pix_fmt)

  455. {

  456.     int bits;

  457.     const PixFmtInfo *pf;

  458. 

  459.     pf = &pix_fmt_info[pix_fmt];

  460.     switch(pf->pixel_type) {

  461.     case FF_PIXEL_PACKED:

  462.         switch(pix_fmt) {

  463.         case PIX_FMT_YUV422:

  464.         case PIX_FMT_UYVY422:

  465.         case PIX_FMT_RGB565:

  466.         case PIX_FMT_RGB555:

  467.             bits = 16;

  468.             break;

  469.         default:

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

  471.             break;

  472.         }

  473.         break;

  474.     case FF_PIXEL_PLANAR:

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

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

  477.         } else {

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

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

  480.         }

  481.         break;

  482.     case FF_PIXEL_PALETTE:

  483.         bits = 8;

  484.         break;

  485.     default:

  486.         bits = -1;

  487.         break;

  488.     }

  489.     return bits;

  490. }

  491. 

  492. static int avcodec_find_best_pix_fmt1(int pix_fmt_mask, 

  493.                                       int src_pix_fmt,

  494.                                       int has_alpha,

  495.                                       int loss_mask)

  496. {

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

  498. 

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

  500.     dst_pix_fmt = -1;

  501.     min_dist = 0x7fffffff;

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

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

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

  505.             if (loss == 0) {

  506.                 dist = avg_bits_per_pixel(i);

  507.                 if (dist < min_dist) {

  508.                     min_dist = dist;

  509.                     dst_pix_fmt = i;

  510.                 }

  511.             }

  512.         }

  513.     }

  514.     return dst_pix_fmt;

  515. }

  516. 

  517. /** 

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

  519.  */

  520. int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,

  521.                               int has_alpha, int *loss_ptr)

  522. {

  523.     int dst_pix_fmt, loss_mask, i;

  524.     static const int loss_mask_order[] = {

  525.         ~0, /* no loss first */

  526.         ~FF_LOSS_ALPHA,

  527.         ~FF_LOSS_RESOLUTION,

  528.         ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),

  529.         ~FF_LOSS_COLORQUANT,

  530.         ~FF_LOSS_DEPTH,

  531.         0,

  532.     };

  533. 

  534.     /* try with successive loss */

  535.     i = 0;

  536.     for(;;) {

  537.         loss_mask = loss_mask_order[i++];

  538.         dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt, 

  539.                                                  has_alpha, loss_mask);

  540.         if (dst_pix_fmt >= 0)

  541.             goto found;

  542.         if (loss_mask == 0)

  543.             break;

  544.     }

  545.     return -1;

  546.  found:

  547.     if (loss_ptr)

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

  549.     return dst_pix_fmt;

  550. }

  551. 

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

  553.                            const uint8_t *src, int src_wrap,

  554.                            int width, int height)

  555. {

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

  557.         memcpy(dst, src, width);

  558.         dst += dst_wrap;

  559.         src += src_wrap;

  560.     }

  561. }

  562. 

  563. /**

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

  565.  */

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

  567.               int pix_fmt, int width, int height)

  568. {

  569.     int bwidth, bits, i;

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

  571.     

  572.     pf = &pix_fmt_info[pix_fmt];

  573.     switch(pf->pixel_type) {

  574.     case FF_PIXEL_PACKED:

  575.         switch(pix_fmt) {

  576.         case PIX_FMT_YUV422:

  577.         case PIX_FMT_UYVY422:

  578.         case PIX_FMT_RGB565:

  579.         case PIX_FMT_RGB555:

  580.             bits = 16;

  581.             break;

  582.         default:

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

  584.             break;

  585.         }

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

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

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

  589.                        bwidth, height);

  590.         break;

  591.     case FF_PIXEL_PLANAR:

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

  593.             int w, h;

  594.             w = width;

  595.             h = height;

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

  597.                 w >>= pf->x_chroma_shift;

  598.                 h >>= pf->y_chroma_shift;

  599.             }

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

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

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

  603.                            bwidth, h);

  604.         }

  605.         break;

  606.     case FF_PIXEL_PALETTE:

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

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

  609.                        width, height);

  610.         /* copy the palette */

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

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

  613.                        4, 256);

  614.         break;

  615.     }

  616. }

  617. 

  618. /* XXX: totally non optimized */

  619. 

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

  621.                               int width, int height)

  622. {

  623.     const uint8_t *p, *p1;

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

  625.     int w;

  626.  

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

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

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

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

  631. 

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

  633.         p = p1;

  634.         lum = lum1;

  635.         cb = cb1;

  636.         cr = cr1;

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

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

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

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

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

  642.             p += 4;

  643.             lum += 2;

  644.             cb++;

  645.             cr++;

  646.         }

  647.         if (w) {

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

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

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

  651.             cb++;

  652.             cr++;

  653.         }

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

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

  656.         if (height>1) {

  657.             p = p1;

  658.             lum = lum1;

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

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

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

  662.                 p += 4;

  663.                 lum += 2;

  664.             }

  665.             if (w) {

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

  667.             }

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

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

  670.         }

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

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

  673.     }

  674. }

  675. 

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

  677.                               int width, int height)

  678. {

  679.     const uint8_t *p, *p1;

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

  681.     int w;

  682.  

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

  684.     

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

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

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

  688. 

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

  690.         p = p1;

  691.         lum = lum1;

  692.         cb = cb1;

  693.         cr = cr1;

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

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

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

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

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

  699.             p += 4;

  700.             lum += 2;

  701.             cb++;

  702.             cr++;

  703.         }

  704.         if (w) {

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

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

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

  708.             cb++;

  709.             cr++;

  710.         }

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

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

  713.         if (height>1) {

  714.             p = p1;

  715.             lum = lum1;

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

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

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

  719.                 p += 4;

  720.                 lum += 2;

  721.             }

  722.             if (w) {

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

  724.             }

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

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

  727.         }

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

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

  730.     }

  731. }

  732. 

  733. 

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

  735.                               int width, int height)

  736. {

  737.     const uint8_t *p, *p1;

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

  739.     int w;

  740. 

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

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

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

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

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

  746.         p = p1;

  747.         lum = lum1;

  748.         cb = cb1;

  749.         cr = cr1;

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

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

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

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

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

  755.             p += 4;

  756.             lum += 2;

  757.             cb++;

  758.             cr++;

  759.         }

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

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

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

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

  764.     }

  765. }

  766. 

  767. 

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

  769.                               int width, int height)

  770. {

  771.     const uint8_t *p, *p1;

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

  773.     int w;

  774. 

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

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

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

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

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

  780.         p = p1;

  781.         lum = lum1;

  782.         cb = cb1;

  783.         cr = cr1;

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

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

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

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

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

  789.             p += 4;

  790.             lum += 2;

  791.             cb++;

  792.             cr++;

  793.         }

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

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

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

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

  798.     }

  799. }

  800. 

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

  802.                               int width, int height)

  803. {

  804.     uint8_t *p, *p1;

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

  806.     int w;

  807. 

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

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

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

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

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

  813.         p = p1;

  814.         lum = lum1;

  815.         cb = cb1;

  816.         cr = cr1;

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

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

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

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

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

  822.             p += 4;

  823.             lum += 2;

  824.             cb++;

  825.             cr++;

  826.         }

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

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

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

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

  831.     }

  832. }

  833. 

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

  835.                               int width, int height)

  836. {

  837.     uint8_t *p, *p1;

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

  839.     int w;

  840. 

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

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

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

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

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

  846.         p = p1;

  847.         lum = lum1;

  848.         cb = cb1;

  849.         cr = cr1;

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

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

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

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

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

  855.             p += 4;

  856.             lum += 2;

  857.             cb++;

  858.             cr++;

  859.         }

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

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

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

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

  864.     }

  865. }

  866. 

  867. 

  868. 

  869. #define SCALEBITS 10

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

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

  872. 

  873. #define YUV_TO_RGB1_CCIR(cb1, cr1)\

  874. {\

  875.     cb = (cb1) - 128;\

  876.     cr = (cr1) - 128;\

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

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

  879.             ONE_HALF;\

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

  881. }

  882. 

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

  884. {\

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

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

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

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

  889. }

  890. 

  891. #define YUV_TO_RGB1(cb1, cr1)\

  892. {\

  893.     cb = (cb1) - 128;\

  894.     cr = (cr1) - 128;\

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

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

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

  898. }

  899. 

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

  901. {\

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

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

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

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

  906. }

  907. 

  908. #define Y_CCIR_TO_JPEG(y)\

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

  910. 

  911. #define Y_JPEG_TO_CCIR(y)\

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

  913. 

  914. #define C_CCIR_TO_JPEG(y)\

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

  916. 

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

  918. static inline int C_JPEG_TO_CCIR(int y) {

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

  920.     if (y < 16)

  921. 	y = 16;

  922.     return y;

  923. }

  924. 

  925. 

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

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

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

  929. 

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

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

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

  933. 

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

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

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

  937. 

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

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

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

  941. 

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

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

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

  945. 

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

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

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

  949. 

  950. static uint8_t y_ccir_to_jpeg[256];

  951. static uint8_t y_jpeg_to_ccir[256];

  952. static uint8_t c_ccir_to_jpeg[256];

  953. static uint8_t c_jpeg_to_ccir[256];

  954. 

  955. /* init various conversion tables */

  956. static void img_convert_init(void)

  957. {

  958.     int i;

  959.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  960. 

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

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

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

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

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

  966.     }

  967. }

  968. 

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

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

  971.                             const uint8_t *src, int src_wrap,

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

  973. {

  974.     int n;

  975.     const uint8_t *s;

  976.     uint8_t *d;

  977.     const uint8_t *table;

  978. 

  979.     table = table1;

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

  981.         s = src;

  982.         d = dst;

  983.         n = width;

  984.         while (n >= 4) {

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

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

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

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

  989.             d += 4;

  990.             s += 4;

  991.             n -= 4;

  992.         }

  993.         while (n > 0) {

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

  995.             d++;

  996.             s++;

  997.             n--;

  998.         }

  999.         dst += dst_wrap;

  1000.         src += src_wrap;

  1001.     }

  1002. }

  1003. 

  1004. /* XXX: use generic filter ? */

  1005. /* XXX: in most cases, the sampling position is incorrect */

  1006. 

  1007. /* 4x1 -> 1x1 */

  1008. static void shrink41(uint8_t *dst, int dst_wrap, 

  1009.                      const uint8_t *src, int src_wrap,

  1010.                      int width, int height)

  1011. {

  1012.     int w;

  1013.     const uint8_t *s;

  1014.     uint8_t *d;

  1015. 

  1016.     for(;height > 0; height--) {

  1017.         s = src;

  1018.         d = dst;

  1019.         for(w = width;w > 0; w--) {

  1020.             d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2;

  1021.             s += 4;

  1022.             d++;

  1023.         }

  1024.         src += src_wrap;

  1025.         dst += dst_wrap;

  1026.     }

  1027. }

  1028. 

  1029. /* 2x1 -> 1x1 */

  1030. static void shrink21(uint8_t *dst, int dst_wrap, 

  1031.                      const uint8_t *src, int src_wrap,

  1032.                      int width, int height)

  1033. {

  1034.     int w;

  1035.     const uint8_t *s;

  1036.     uint8_t *d;

  1037. 

  1038.     for(;height > 0; height--) {

  1039.         s = src;

  1040.         d = dst;

  1041.         for(w = width;w > 0; w--) {

  1042.             d[0] = (s[0] + s[1]) >> 1;

  1043.             s += 2;

  1044.             d++;

  1045.         }

  1046.         src += src_wrap;

  1047.         dst += dst_wrap;

  1048.     }

  1049. }

  1050. 

  1051. /* 1x2 -> 1x1 */

  1052. static void shrink12(uint8_t *dst, int dst_wrap, 

  1053.                      const uint8_t *src, int src_wrap,

  1054.                      int width, int height)

  1055. {

  1056.     int w;

  1057.     uint8_t *d;

  1058.     const uint8_t *s1, *s2;

  1059. 

  1060.     for(;height > 0; height--) {

  1061.         s1 = src;

  1062.         s2 = s1 + src_wrap;

  1063.         d = dst;

  1064.         for(w = width;w >= 4; w-=4) {

  1065.             d[0] = (s1[0] + s2[0]) >> 1;

  1066.             d[1] = (s1[1] + s2[1]) >> 1;

  1067.             d[2] = (s1[2] + s2[2]) >> 1;

  1068.             d[3] = (s1[3] + s2[3]) >> 1;

  1069.             s1 += 4;

  1070.             s2 += 4;

  1071.             d += 4;

  1072.         }

  1073.         for(;w > 0; w--) {

  1074.             d[0] = (s1[0] + s2[0]) >> 1;

  1075.             s1++;

  1076.             s2++;

  1077.             d++;

  1078.         }

  1079.         src += 2 * src_wrap;

  1080.         dst += dst_wrap;

  1081.     }

  1082. }

  1083. 

  1084. /* 2x2 -> 1x1 */

  1085. static void shrink22(uint8_t *dst, int dst_wrap, 

  1086.                      const uint8_t *src, int src_wrap,

  1087.                      int width, int height)

  1088. {

  1089.     int w;

  1090.     const uint8_t *s1, *s2;

  1091.     uint8_t *d;

  1092. 

  1093.     for(;height > 0; height--) {

  1094.         s1 = src;

  1095.         s2 = s1 + src_wrap;

  1096.         d = dst;

  1097.         for(w = width;w >= 4; w-=4) {

  1098.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  1099.             d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;

  1100.             d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;

  1101.             d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;

  1102.             s1 += 8;

  1103.             s2 += 8;

  1104.             d += 4;

  1105.         }

  1106.         for(;w > 0; w--) {

  1107.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  1108.             s1 += 2;

  1109.             s2 += 2;

  1110.             d++;

  1111.         }

  1112.         src += 2 * src_wrap;

  1113.         dst += dst_wrap;

  1114.     }

  1115. }

  1116. 

  1117. /* 4x4 -> 1x1 */

  1118. static void shrink44(uint8_t *dst, int dst_wrap, 

  1119.                      const uint8_t *src, int src_wrap,

  1120.                      int width, int height)

  1121. {

  1122.     int w;

  1123.     const uint8_t *s1, *s2, *s3, *s4;

  1124.     uint8_t *d;

  1125. 

  1126.     for(;height > 0; height--) {

  1127.         s1 = src;

  1128.         s2 = s1 + src_wrap;

  1129.         s3 = s2 + src_wrap;

  1130.         s4 = s3 + src_wrap;

  1131.         d = dst;

  1132.         for(w = width;w > 0; w--) {

  1133.             d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +

  1134.                     s2[0] + s2[1] + s2[2] + s2[3] +

  1135.                     s3[0] + s3[1] + s3[2] + s3[3] +

  1136.                     s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;

  1137.             s1 += 4;

  1138.             s2 += 4;

  1139.             s3 += 4;

  1140.             s4 += 4;

  1141.             d++;

  1142.         }

  1143.         src += 4 * src_wrap;

  1144.         dst += dst_wrap;

  1145.     }

  1146. }

  1147. 

  1148. static void grow21_line(uint8_t *dst, const uint8_t *src,

  1149.                         int width)

  1150. {

  1151.     int w;

  1152.     const uint8_t *s1;

  1153.     uint8_t *d;

  1154. 

  1155.     s1 = src;

  1156.     d = dst;

  1157.     for(w = width;w >= 4; w-=4) {

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

  1159.         d[3] = d[2] = s1[1];

  1160.         s1 += 2;

  1161.         d += 4;

  1162.     }

  1163.     for(;w >= 2; w -= 2) {

  1164.         d[1] = d[0] = s1[0];

  1165.         s1 ++;

  1166.         d += 2;

  1167.     }

  1168.     /* only needed if width is not a multiple of two */

  1169.     /* XXX: veryfy that */

  1170.     if (w) {

  1171.         d[0] = s1[0];

  1172.     }

  1173. }

  1174. 

  1175. static void grow41_line(uint8_t *dst, const uint8_t *src,

  1176.                         int width)

  1177. {

  1178.     int w, v;

  1179.     const uint8_t *s1;

  1180.     uint8_t *d;

  1181. 

  1182.     s1 = src;

  1183.     d = dst;

  1184.     for(w = width;w >= 4; w-=4) {

  1185.         v = s1[0];

  1186.         d[0] = v;

  1187.         d[1] = v;

  1188.         d[2] = v;

  1189.         d[3] = v;

  1190.         s1 ++;

  1191.         d += 4;

  1192.     }

  1193. }

  1194. 

  1195. /* 1x1 -> 2x1 */

  1196. static void grow21(uint8_t *dst, int dst_wrap,

  1197.                    const uint8_t *src, int src_wrap,

  1198.                    int width, int height)

  1199. {

  1200.     for(;height > 0; height--) {

  1201.         grow21_line(dst, src, width);

  1202.         src += src_wrap;

  1203.         dst += dst_wrap;

  1204.     }

  1205. }

  1206. 

  1207. /* 1x1 -> 2x2 */

  1208. static void grow22(uint8_t *dst, int dst_wrap,

  1209.                    const uint8_t *src, int src_wrap,

  1210.                    int width, int height)

  1211. {

  1212.     for(;height > 0; height--) {

  1213.         grow21_line(dst, src, width);

  1214.         if (height%2)

  1215.             src += src_wrap;

  1216.         dst += dst_wrap;

  1217.     }

  1218. }

  1219. 

  1220. /* 1x1 -> 4x1 */

  1221. static void grow41(uint8_t *dst, int dst_wrap,

  1222.                    const uint8_t *src, int src_wrap,

  1223.                    int width, int height)

  1224. {

  1225.     for(;height > 0; height--) {

  1226.         grow41_line(dst, src, width);

  1227.         src += src_wrap;

  1228.         dst += dst_wrap;

  1229.     }

  1230. }

  1231. 

  1232. /* 1x1 -> 4x4 */

  1233. static void grow44(uint8_t *dst, int dst_wrap,

  1234.                    const uint8_t *src, int src_wrap,

  1235.                    int width, int height)

  1236. {

  1237.     for(;height > 0; height--) {

  1238.         grow41_line(dst, src, width);

  1239.         if ((height & 3) == 1)

  1240.             src += src_wrap;

  1241.         dst += dst_wrap;

  1242.     }

  1243. }

  1244. 

  1245. /* 1x2 -> 2x1 */

  1246. static void conv411(uint8_t *dst, int dst_wrap, 

  1247.                     const uint8_t *src, int src_wrap,

  1248.                     int width, int height)

  1249. {

  1250.     int w, c;

  1251.     const uint8_t *s1, *s2;

  1252.     uint8_t *d;

  1253. 

  1254.     width>>=1;

  1255. 

  1256.     for(;height > 0; height--) {

  1257.         s1 = src;

  1258.         s2 = src + src_wrap;

  1259.         d = dst;

  1260.         for(w = width;w > 0; w--) {

  1261.             c = (s1[0] + s2[0]) >> 1;

  1262.             d[0] = c;

  1263.             d[1] = c;

  1264.             s1++;

  1265.             s2++;

  1266.             d += 2;

  1267.         }

  1268.         src += src_wrap * 2;

  1269.         dst += dst_wrap;

  1270.     }

  1271. }

  1272. 

  1273. /* XXX: add jpeg quantize code */

  1274. 

  1275. #define TRANSP_INDEX (6*6*6)

  1276. 

  1277. /* this is maybe slow, but allows for extensions */

  1278. static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)

  1279. {

  1280.     return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));

  1281. }

  1282. 

  1283. static void build_rgb_palette(uint8_t *palette, int has_alpha)

  1284. {

  1285.     uint32_t *pal;

  1286.     static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };

  1287.     int i, r, g, b;

  1288. 

  1289.     pal = (uint32_t *)palette;

  1290.     i = 0;

  1291.     for(r = 0; r < 6; r++) {

  1292.         for(g = 0; g < 6; g++) {

  1293.             for(b = 0; b < 6; b++) {

  1294.                 pal[i++] = (0xff << 24) | (pal_value[r] << 16) | 

  1295.                     (pal_value[g] << 8) | pal_value[b];

  1296.             }

  1297.         }

  1298.     }

  1299.     if (has_alpha)

  1300.         pal[i++] = 0;

  1301.     while (i < 256)

  1302.         pal[i++] = 0xff000000;

  1303. }

  1304. 

  1305. /* copy bit n to bits 0 ... n - 1 */

  1306. static inline unsigned int bitcopy_n(unsigned int a, int n)

  1307. {

  1308.     int mask;

  1309.     mask = (1 << n) - 1;

  1310.     return (a & (0xff & ~mask)) | ((-((a >> n) & 1)) & mask);

  1311. }

  1312. 

  1313. /* rgb555 handling */

  1314. 

  1315. #define RGB_NAME rgb555

  1316. 

  1317. #define RGB_IN(r, g, b, s)\

  1318. {\

  1319.     unsigned int v = ((const uint16_t *)(s))[0];\

  1320.     r = bitcopy_n(v >> (10 - 3), 3);\

  1321.     g = bitcopy_n(v >> (5 - 3), 3);\

  1322.     b = bitcopy_n(v << 3, 3);\

  1323. }

  1324. 

  1325. #define RGBA_IN(r, g, b, a, s)\

  1326. {\

  1327.     unsigned int v = ((const uint16_t *)(s))[0];\

  1328.     r = bitcopy_n(v >> (10 - 3), 3);\

  1329.     g = bitcopy_n(v >> (5 - 3), 3);\

  1330.     b = bitcopy_n(v << 3, 3);\

  1331.     a = (-(v >> 15)) & 0xff;\

  1332. }

  1333. 

  1334. #define RGBA_OUT(d, r, g, b, a)\

  1335. {\

  1336.     ((uint16_t *)(d))[0] = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3) | \

  1337.                            ((a << 8) & 0x8000);\

  1338. }

  1339. 

  1340. #define BPP 2

  1341. 

  1342. #include "imgconvert_template.h"

  1343. 

  1344. /* rgb565 handling */

  1345. 

  1346. #define RGB_NAME rgb565

  1347. 

  1348. #define RGB_IN(r, g, b, s)\

  1349. {\

  1350.     unsigned int v = ((const uint16_t *)(s))[0];\

  1351.     r = bitcopy_n(v >> (11 - 3), 3);\

  1352.     g = bitcopy_n(v >> (5 - 2), 2);\

  1353.     b = bitcopy_n(v << 3, 3);\

  1354. }

  1355. 

  1356. #define RGB_OUT(d, r, g, b)\

  1357. {\

  1358.     ((uint16_t *)(d))[0] = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);\

  1359. }

  1360. 

  1361. #define BPP 2

  1362. 

  1363. #include "imgconvert_template.h"

  1364. 

  1365. /* bgr24 handling */

  1366. 

  1367. #define RGB_NAME bgr24

  1368. 

  1369. #define RGB_IN(r, g, b, s)\

  1370. {\

  1371.     b = (s)[0];\

  1372.     g = (s)[1];\

  1373.     r = (s)[2];\

  1374. }

  1375. 

  1376. #define RGB_OUT(d, r, g, b)\

  1377. {\

  1378.     (d)[0] = b;\

  1379.     (d)[1] = g;\

  1380.     (d)[2] = r;\

  1381. }

  1382. 

  1383. #define BPP 3

  1384. 

  1385. #include "imgconvert_template.h"

  1386. 

  1387. #undef RGB_IN

  1388. #undef RGB_OUT

  1389. #undef BPP

  1390. 

  1391. /* rgb24 handling */

  1392. 

  1393. #define RGB_NAME rgb24

  1394. #define FMT_RGB24

  1395. 

  1396. #define RGB_IN(r, g, b, s)\

  1397. {\

  1398.     r = (s)[0];\

  1399.     g = (s)[1];\

  1400.     b = (s)[2];\

  1401. }

  1402. 

  1403. #define RGB_OUT(d, r, g, b)\

  1404. {\

  1405.     (d)[0] = r;\

  1406.     (d)[1] = g;\

  1407.     (d)[2] = b;\

  1408. }

  1409. 

  1410. #define BPP 3

  1411. 

  1412. #include "imgconvert_template.h"

  1413. 

  1414. /* rgba32 handling */

  1415. 

  1416. #define RGB_NAME rgba32

  1417. #define FMT_RGBA32

  1418. 

  1419. #define RGB_IN(r, g, b, s)\

  1420. {\

  1421.     unsigned int v = ((const uint32_t *)(s))[0];\

  1422.     r = (v >> 16) & 0xff;\

  1423.     g = (v >> 8) & 0xff;\

  1424.     b = v & 0xff;\

  1425. }

  1426. 

  1427. #define RGBA_IN(r, g, b, a, s)\

  1428. {\

  1429.     unsigned int v = ((const uint32_t *)(s))[0];\

  1430.     a = (v >> 24) & 0xff;\

  1431.     r = (v >> 16) & 0xff;\

  1432.     g = (v >> 8) & 0xff;\

  1433.     b = v & 0xff;\

  1434. }

  1435. 

  1436. #define RGBA_OUT(d, r, g, b, a)\

  1437. {\

  1438.     ((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;\

  1439. }

  1440. 

  1441. #define BPP 4

  1442. 

  1443. #include "imgconvert_template.h"

  1444. 

  1445. static void mono_to_gray(AVPicture *dst, const AVPicture *src,

  1446.                          int width, int height, int xor_mask)

  1447. {

  1448.     const unsigned char *p;

  1449.     unsigned char *q;

  1450.     int v, dst_wrap, src_wrap;

  1451.     int y, w;

  1452. 

  1453.     p = src->data[0];

  1454.     src_wrap = src->linesize[0] - ((width + 7) >> 3);

  1455. 

  1456.     q = dst->data[0];

  1457.     dst_wrap = dst->linesize[0] - width;

  1458.     for(y=0;y<height;y++) {

  1459.         w = width; 

  1460.         while (w >= 8) {

  1461.             v = *p++ ^ xor_mask;

  1462.             q[0] = -(v >> 7);

  1463.             q[1] = -((v >> 6) & 1);

  1464.             q[2] = -((v >> 5) & 1);

  1465.             q[3] = -((v >> 4) & 1);

  1466.             q[4] = -((v >> 3) & 1);

  1467.             q[5] = -((v >> 2) & 1);

  1468.             q[6] = -((v >> 1) & 1);

  1469.             q[7] = -((v >> 0) & 1);

  1470.             w -= 8;

  1471.             q += 8;

  1472.         }

  1473.         if (w > 0) {

  1474.             v = *p++ ^ xor_mask;

  1475.             do {

  1476.                 q[0] = -((v >> 7) & 1);

  1477.                 q++;

  1478.                 v <<= 1;

  1479.             } while (--w);

  1480.         }

  1481.         p += src_wrap;

  1482.         q += dst_wrap;

  1483.     }

  1484. }

  1485. 

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

  1487.                                int width, int height)

  1488. {

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

  1490. }

  1491. 

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

  1493.                                int width, int height)

  1494. {

  1495.     mono_to_gray(dst, src, width, height, 0x00);

  1496. }

  1497. 

  1498. static void gray_to_mono(AVPicture *dst, const AVPicture *src,

  1499.                          int width, int height, int xor_mask)

  1500. {

  1501.     int n;

  1502.     const uint8_t *s;

  1503.     uint8_t *d;

  1504.     int j, b, v, n1, src_wrap, dst_wrap, y;

  1505. 

  1506.     s = src->data[0];

  1507.     src_wrap = src->linesize[0] - width;

  1508. 

  1509.     d = dst->data[0];

  1510.     dst_wrap = dst->linesize[0] - ((width + 7) >> 3);

  1511. 

  1512.     for(y=0;y<height;y++) {

  1513.         n = width;

  1514.         while (n >= 8) {

  1515.             v = 0;

  1516.             for(j=0;j<8;j++) {

  1517.                 b = s[0];

  1518.                 s++;

  1519.                 v = (v << 1) | (b >> 7);

  1520.             }

  1521.             d[0] = v ^ xor_mask;

  1522.             d++;

  1523.             n -= 8;

  1524.         }

  1525.         if (n > 0) {

  1526.             n1 = n;

  1527.             v = 0;

  1528.             while (n > 0) {

  1529.                 b = s[0];

  1530.                 s++;

  1531.                 v = (v << 1) | (b >> 7);

  1532.                 n--;

  1533.             }

  1534.             d[0] = (v << (8 - (n1 & 7))) ^ xor_mask;

  1535.             d++;

  1536.         }

  1537.         s += src_wrap;

  1538.         d += dst_wrap;

  1539.     }

  1540. }

  1541. 

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

  1543.                               int width, int height)

  1544. {

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

  1546. }

  1547. 

  1548. static void gray_to_monoblack(AVPicture *dst, const AVPicture *src,

  1549.                               int width, int height)

  1550. {

  1551.     gray_to_mono(dst, src, width, height, 0x00);

  1552. }

  1553. 

  1554. typedef struct ConvertEntry {

  1555.     void (*convert)(AVPicture *dst,

  1556. 		    const AVPicture *src, int width, int height);

  1557. } ConvertEntry;

  1558. 

  1559. /* Add each new convertion function in this table. In order to be able

  1560.    to convert from any format to any format, the following constraints

  1561.    must be satisfied:

  1562. 

  1563.    - all FF_COLOR_RGB formats must convert to and from PIX_FMT_RGB24 

  1564. 

  1565.    - all FF_COLOR_GRAY formats must convert to and from PIX_FMT_GRAY8

  1566. 

  1567.    - all FF_COLOR_RGB formats with alpha must convert to and from PIX_FMT_RGBA32

  1568. 

  1569.    - PIX_FMT_YUV444P and PIX_FMT_YUVJ444P must convert to and from

  1570.      PIX_FMT_RGB24.

  1571. 

  1572.    - PIX_FMT_422 must convert to and from PIX_FMT_422P.

  1573. 

  1574.    The other conversion functions are just optimisations for common cases.

  1575. */

  1576. static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {

  1577.     [PIX_FMT_YUV420P] = {

  1578.         [PIX_FMT_RGB555] = { 

  1579.             .convert = yuv420p_to_rgb555

  1580.         },

  1581.         [PIX_FMT_RGB565] = { 

  1582.             .convert = yuv420p_to_rgb565

  1583.         },

  1584.         [PIX_FMT_BGR24] = { 

  1585.             .convert = yuv420p_to_bgr24

  1586.         },

  1587.         [PIX_FMT_RGB24] = { 

  1588.             .convert = yuv420p_to_rgb24

  1589.         },

  1590.         [PIX_FMT_RGBA32] = { 

  1591.             .convert = yuv420p_to_rgba32

  1592.         },

  1593.     },

  1594.     [PIX_FMT_YUV422P] = { 

  1595.         [PIX_FMT_YUV422] = { 

  1596.             .convert = yuv422p_to_yuv422,

  1597.         },

  1598.         [PIX_FMT_UYVY422] = { 

  1599.             .convert = yuv422p_to_uyvy422,

  1600.         },

  1601.     },

  1602.     [PIX_FMT_YUV444P] = { 

  1603.         [PIX_FMT_RGB24] = { 

  1604.             .convert = yuv444p_to_rgb24

  1605.         },

  1606.     },

  1607.     [PIX_FMT_YUVJ420P] = {

  1608.         [PIX_FMT_RGB555] = { 

  1609.             .convert = yuvj420p_to_rgb555

  1610.         },

  1611.         [PIX_FMT_RGB565] = { 

  1612.             .convert = yuvj420p_to_rgb565

  1613.         },

  1614.         [PIX_FMT_BGR24] = { 

  1615.             .convert = yuvj420p_to_bgr24

  1616.         },

  1617.         [PIX_FMT_RGB24] = { 

  1618.             .convert = yuvj420p_to_rgb24

  1619.         },

  1620.         [PIX_FMT_RGBA32] = { 

  1621.             .convert = yuvj420p_to_rgba32

  1622.         },

  1623.     },

  1624.     [PIX_FMT_YUVJ444P] = { 

  1625.         [PIX_FMT_RGB24] = { 

  1626.             .convert = yuvj444p_to_rgb24

  1627.         },

  1628.     },

  1629.     [PIX_FMT_YUV422] = { 

  1630.         [PIX_FMT_YUV420P] = { 

  1631.             .convert = yuv422_to_yuv420p,

  1632.         },

  1633.         [PIX_FMT_YUV422P] = { 

  1634.             .convert = yuv422_to_yuv422p,

  1635.         },

  1636.     },

  1637.     [PIX_FMT_UYVY422] = { 

  1638.         [PIX_FMT_YUV420P] = { 

  1639.             .convert = uyvy422_to_yuv420p,

  1640.         },

  1641.         [PIX_FMT_YUV422P] = { 

  1642.             .convert = uyvy422_to_yuv422p,

  1643.         },

  1644.     },

  1645.     [PIX_FMT_RGB24] = {

  1646.         [PIX_FMT_YUV420P] = { 

  1647.             .convert = rgb24_to_yuv420p

  1648.         },

  1649.         [PIX_FMT_RGB565] = { 

  1650.             .convert = rgb24_to_rgb565

  1651.         },

  1652.         [PIX_FMT_RGB555] = { 

  1653.             .convert = rgb24_to_rgb555

  1654.         },

  1655.         [PIX_FMT_RGBA32] = { 

  1656.             .convert = rgb24_to_rgba32

  1657.         },

  1658.         [PIX_FMT_BGR24] = { 

  1659.             .convert = rgb24_to_bgr24

  1660.         },

  1661.         [PIX_FMT_GRAY8] = { 

  1662.             .convert = rgb24_to_gray

  1663.         },

  1664.         [PIX_FMT_PAL8] = {

  1665.             .convert = rgb24_to_pal8

  1666.         },

  1667.         [PIX_FMT_YUV444P] = { 

  1668.             .convert = rgb24_to_yuv444p

  1669.         },

  1670.         [PIX_FMT_YUVJ420P] = { 

  1671.             .convert = rgb24_to_yuvj420p

  1672.         },

  1673.         [PIX_FMT_YUVJ444P] = { 

  1674.             .convert = rgb24_to_yuvj444p

  1675.         },

  1676.     },

  1677.     [PIX_FMT_RGBA32] = {

  1678.         [PIX_FMT_RGB24] = { 

  1679.             .convert = rgba32_to_rgb24

  1680.         },

  1681.         [PIX_FMT_RGB555] = { 

  1682.             .convert = rgba32_to_rgb555

  1683.         },

  1684.         [PIX_FMT_PAL8] = { 

  1685.             .convert = rgba32_to_pal8

  1686.         },

  1687.         [PIX_FMT_YUV420P] = { 

  1688.             .convert = rgba32_to_yuv420p

  1689.         },

  1690.         [PIX_FMT_GRAY8] = { 

  1691.             .convert = rgba32_to_gray

  1692.         },

  1693.     },

  1694.     [PIX_FMT_BGR24] = {

  1695.         [PIX_FMT_RGB24] = { 

  1696.             .convert = bgr24_to_rgb24

  1697.         },

  1698.         [PIX_FMT_YUV420P] = { 

  1699.             .convert = bgr24_to_yuv420p

  1700.         },

  1701.         [PIX_FMT_GRAY8] = { 

  1702.             .convert = bgr24_to_gray

  1703.         },

  1704.     },

  1705.     [PIX_FMT_RGB555] = {

  1706.         [PIX_FMT_RGB24] = { 

  1707.             .convert = rgb555_to_rgb24

  1708.         },

  1709.         [PIX_FMT_RGBA32] = { 

  1710.             .convert = rgb555_to_rgba32

  1711.         },

  1712.         [PIX_FMT_YUV420P] = { 

  1713.             .convert = rgb555_to_yuv420p

  1714.         },

  1715.         [PIX_FMT_GRAY8] = { 

  1716.             .convert = rgb555_to_gray

  1717.         },

  1718.     },

  1719.     [PIX_FMT_RGB565] = {

  1720.         [PIX_FMT_RGB24] = { 

  1721.             .convert = rgb565_to_rgb24

  1722.         },

  1723.         [PIX_FMT_YUV420P] = { 

  1724.             .convert = rgb565_to_yuv420p

  1725.         },

  1726.         [PIX_FMT_GRAY8] = { 

  1727.             .convert = rgb565_to_gray

  1728.         },

  1729.     },

  1730.     [PIX_FMT_GRAY8] = {

  1731.         [PIX_FMT_RGB555] = { 

  1732.             .convert = gray_to_rgb555

  1733.         },

  1734.         [PIX_FMT_RGB565] = { 

  1735.             .convert = gray_to_rgb565

  1736.         },

  1737.         [PIX_FMT_RGB24] = { 

  1738.             .convert = gray_to_rgb24

  1739.         },

  1740.         [PIX_FMT_BGR24] = { 

  1741.             .convert = gray_to_bgr24

  1742.         },

  1743.         [PIX_FMT_RGBA32] = { 

  1744.             .convert = gray_to_rgba32

  1745.         },

  1746.         [PIX_FMT_MONOWHITE] = { 

  1747.             .convert = gray_to_monowhite

  1748.         },

  1749.         [PIX_FMT_MONOBLACK] = { 

  1750.             .convert = gray_to_monoblack

  1751.         },

  1752.     },

  1753.     [PIX_FMT_MONOWHITE] = {

  1754.         [PIX_FMT_GRAY8] = { 

  1755.             .convert = monowhite_to_gray

  1756.         },

  1757.     },

  1758.     [PIX_FMT_MONOBLACK] = {

  1759.         [PIX_FMT_GRAY8] = { 

  1760.             .convert = monoblack_to_gray

  1761.         },

  1762.     },

  1763.     [PIX_FMT_PAL8] = {

  1764.         [PIX_FMT_RGB555] = { 

  1765.             .convert = pal8_to_rgb555

  1766.         },

  1767.         [PIX_FMT_RGB565] = { 

  1768.             .convert = pal8_to_rgb565

  1769.         },

  1770.         [PIX_FMT_BGR24] = { 

  1771.             .convert = pal8_to_bgr24

  1772.         },

  1773.         [PIX_FMT_RGB24] = { 

  1774.             .convert = pal8_to_rgb24

  1775.         },

  1776.         [PIX_FMT_RGBA32] = { 

  1777.             .convert = pal8_to_rgba32

  1778.         },

  1779.     },

  1780. };

  1781. 

  1782. int avpicture_alloc(AVPicture *picture,

  1783.                            int pix_fmt, int width, int height)

  1784. {

  1785.     unsigned int size;

  1786.     void *ptr;

  1787. 

  1788.     size = avpicture_get_size(pix_fmt, width, height);

  1789.     ptr = av_malloc(size);

  1790.     if (!ptr)

  1791.         goto fail;

  1792.     avpicture_fill(picture, ptr, pix_fmt, width, height);

  1793.     return 0;

  1794.  fail:

  1795.     memset(picture, 0, sizeof(AVPicture));

  1796.     return -1;

  1797. }

  1798. 

  1799. void avpicture_free(AVPicture *picture)

  1800. {

  1801.     av_free(picture->data[0]);

  1802. }

  1803. 

  1804. /* return true if yuv planar */

  1805. static inline int is_yuv_planar(PixFmtInfo *ps)

  1806. {

  1807.     return (ps->color_type == FF_COLOR_YUV ||

  1808.             ps->color_type == FF_COLOR_YUV_JPEG) && 

  1809.         ps->pixel_type == FF_PIXEL_PLANAR;

  1810. }

  1811. 

  1812. /* XXX: always use linesize. Return -1 if not supported */

  1813. int img_convert(AVPicture *dst, int dst_pix_fmt,

  1814.                 const AVPicture *src, int src_pix_fmt, 

  1815.                 int src_width, int src_height)

  1816. {

  1817.     static int inited;

  1818.     int i, ret, dst_width, dst_height, int_pix_fmt;

  1819.     PixFmtInfo *src_pix, *dst_pix;

  1820.     ConvertEntry *ce;

  1821.     AVPicture tmp1, *tmp = &tmp1;

  1822. 

  1823.     if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB ||

  1824.         dst_pix_fmt < 0 || dst_pix_fmt >= PIX_FMT_NB)

  1825.         return -1;

  1826.     if (src_width <= 0 || src_height <= 0)

  1827.         return 0;

  1828. 

  1829.     if (!inited) {

  1830.         inited = 1;

  1831.         img_convert_init();

  1832.     }

  1833. 

  1834.     dst_width = src_width;

  1835.     dst_height = src_height;

  1836. 

  1837.     dst_pix = &pix_fmt_info[dst_pix_fmt];

  1838.     src_pix = &pix_fmt_info[src_pix_fmt];

  1839.     if (src_pix_fmt == dst_pix_fmt) {

  1840.         /* no conversion needed: just copy */

  1841.         img_copy(dst, src, dst_pix_fmt, dst_width, dst_height);

  1842.         return 0;

  1843.     }

  1844. 

  1845.     ce = &convert_table[src_pix_fmt][dst_pix_fmt];

  1846.     if (ce->convert) {

  1847.         /* specific conversion routine */

  1848.         ce->convert(dst, src, dst_width, dst_height);

  1849.         return 0;

  1850.     }

  1851. 

  1852.     /* gray to YUV */

  1853.     if (is_yuv_planar(dst_pix) &&

  1854.         src_pix_fmt == PIX_FMT_GRAY8) {

  1855.         int w, h, y;

  1856.         uint8_t *d;

  1857. 

  1858.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG) {

  1859.             img_copy_plane(dst->data[0], dst->linesize[0],

  1860.                      src->data[0], src->linesize[0],

  1861.                      dst_width, dst_height);

  1862.         } else {

  1863.             img_apply_table(dst->data[0], dst->linesize[0],

  1864.                             src->data[0], src->linesize[0],

  1865.                             dst_width, dst_height,

  1866.                             y_jpeg_to_ccir);

  1867.         }

  1868.         /* fill U and V with 128 */

  1869.         w = dst_width;

  1870.         h = dst_height;

  1871.         w >>= dst_pix->x_chroma_shift;

  1872.         h >>= dst_pix->y_chroma_shift;

  1873.         for(i = 1; i <= 2; i++) {

  1874.             d = dst->data[i];

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

  1876.                 memset(d, 128, w);

  1877.                 d += dst->linesize[i];

  1878.             }

  1879.         }

  1880.         return 0;

  1881.     }

  1882. 

  1883.     /* YUV to gray */

  1884.     if (is_yuv_planar(src_pix) && 

  1885.         dst_pix_fmt == PIX_FMT_GRAY8) {

  1886.         if (src_pix->color_type == FF_COLOR_YUV_JPEG) {

  1887.             img_copy_plane(dst->data[0], dst->linesize[0],

  1888.                      src->data[0], src->linesize[0],

  1889.                      dst_width, dst_height);

  1890.         } else {

  1891.             img_apply_table(dst->data[0], dst->linesize[0],

  1892.                             src->data[0], src->linesize[0],

  1893.                             dst_width, dst_height,

  1894.                             y_ccir_to_jpeg);

  1895.         }

  1896.         return 0;

  1897.     }

  1898. 

  1899.     /* YUV to YUV planar */

  1900.     if (is_yuv_planar(dst_pix) && is_yuv_planar(src_pix)) {

  1901.         int x_shift, y_shift, w, h, xy_shift;

  1902.         void (*resize_func)(uint8_t *dst, int dst_wrap, 

  1903.                             const uint8_t *src, int src_wrap,

  1904.                             int width, int height);

  1905. 

  1906.         /* compute chroma size of the smallest dimensions */

  1907.         w = dst_width;

  1908.         h = dst_height;

  1909.         if (dst_pix->x_chroma_shift >= src_pix->x_chroma_shift)

  1910.             w >>= dst_pix->x_chroma_shift;

  1911.         else

  1912.             w >>= src_pix->x_chroma_shift;

  1913.         if (dst_pix->y_chroma_shift >= src_pix->y_chroma_shift)

  1914.             h >>= dst_pix->y_chroma_shift;

  1915.         else

  1916.             h >>= src_pix->y_chroma_shift;

  1917. 

  1918.         x_shift = (dst_pix->x_chroma_shift - src_pix->x_chroma_shift);

  1919.         y_shift = (dst_pix->y_chroma_shift - src_pix->y_chroma_shift);

  1920.         xy_shift = ((x_shift & 0xf) << 4) | (y_shift & 0xf);

  1921.         /* there must be filters for conversion at least from and to

  1922.            YUV444 format */

  1923.         switch(xy_shift) {

  1924.         case 0x00:

  1925.             resize_func = img_copy_plane;

  1926.             break;

  1927.         case 0x10:

  1928.             resize_func = shrink21;

  1929.             break;

  1930.         case 0x20:

  1931.             resize_func = shrink41;

  1932.             break;

  1933.         case 0x01:

  1934.             resize_func = shrink12;

  1935.             break;

  1936.         case 0x11:

  1937.             resize_func = shrink22;

  1938.             break;

  1939.         case 0x22:

  1940.             resize_func = shrink44;

  1941.             break;

  1942.         case 0xf0:

  1943.             resize_func = grow21;

  1944.             break;

  1945.         case 0xe0:

  1946.             resize_func = grow41;

  1947.             break;

  1948.         case 0xff:

  1949.             resize_func = grow22;

  1950.             break;

  1951.         case 0xee:

  1952.             resize_func = grow44;

  1953.             break;

  1954.         case 0xf1:

  1955.             resize_func = conv411;

  1956.             break;

  1957.         default:

  1958.             /* currently not handled */

  1959.             goto no_chroma_filter;

  1960.         }

  1961. 

  1962.         img_copy_plane(dst->data[0], dst->linesize[0],

  1963.                        src->data[0], src->linesize[0],

  1964.                        dst_width, dst_height);

  1965. 

  1966.         for(i = 1;i <= 2; i++)

  1967.             resize_func(dst->data[i], dst->linesize[i],

  1968.                         src->data[i], src->linesize[i],

  1969.                         dst_width>>dst_pix->x_chroma_shift, dst_height>>dst_pix->y_chroma_shift);

  1970.         /* if yuv color space conversion is needed, we do it here on

  1971.            the destination image */

  1972.         if (dst_pix->color_type != src_pix->color_type) {

  1973.             const uint8_t *y_table, *c_table;

  1974.             if (dst_pix->color_type == FF_COLOR_YUV) {

  1975.                 y_table = y_jpeg_to_ccir;

  1976.                 c_table = c_jpeg_to_ccir;

  1977.             } else {

  1978.                 y_table = y_ccir_to_jpeg;

  1979.                 c_table = c_ccir_to_jpeg;

  1980.             }

  1981.             img_apply_table(dst->data[0], dst->linesize[0],

  1982.                             dst->data[0], dst->linesize[0],

  1983.                             dst_width, dst_height,

  1984.                             y_table);

  1985. 

  1986.             for(i = 1;i <= 2; i++)

  1987.                 img_apply_table(dst->data[i], dst->linesize[i],

  1988.                                 dst->data[i], dst->linesize[i],

  1989.                                 dst_width>>dst_pix->x_chroma_shift, 

  1990.                                 dst_height>>dst_pix->y_chroma_shift,

  1991.                                 c_table);

  1992.         }

  1993.         return 0;

  1994.     }

  1995.  no_chroma_filter:

  1996. 

  1997.     /* try to use an intermediate format */

  1998.     if (src_pix_fmt == PIX_FMT_YUV422 ||

  1999.         dst_pix_fmt == PIX_FMT_YUV422) {

  2000.         /* specific case: convert to YUV422P first */

  2001.         int_pix_fmt = PIX_FMT_YUV422P;

  2002.     } else if (src_pix_fmt == PIX_FMT_UYVY422 ||

  2003.         dst_pix_fmt == PIX_FMT_UYVY422) {

  2004.         /* specific case: convert to YUV422P first */

  2005.         int_pix_fmt = PIX_FMT_YUV422P;

  2006.     } else if ((src_pix->color_type == FF_COLOR_GRAY &&

  2007.                 src_pix_fmt != PIX_FMT_GRAY8) || 

  2008.                (dst_pix->color_type == FF_COLOR_GRAY &&

  2009.                 dst_pix_fmt != PIX_FMT_GRAY8)) {

  2010.         /* gray8 is the normalized format */

  2011.         int_pix_fmt = PIX_FMT_GRAY8;

  2012.     } else if ((is_yuv_planar(src_pix) && 

  2013.                 src_pix_fmt != PIX_FMT_YUV444P &&

  2014.                 src_pix_fmt != PIX_FMT_YUVJ444P)) {

  2015.         /* yuv444 is the normalized format */

  2016.         if (src_pix->color_type == FF_COLOR_YUV_JPEG)

  2017.             int_pix_fmt = PIX_FMT_YUVJ444P;

  2018.         else

  2019.             int_pix_fmt = PIX_FMT_YUV444P;

  2020.     } else if ((is_yuv_planar(dst_pix) && 

  2021.                 dst_pix_fmt != PIX_FMT_YUV444P &&

  2022.                 dst_pix_fmt != PIX_FMT_YUVJ444P)) {

  2023.         /* yuv444 is the normalized format */

  2024.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG)

  2025.             int_pix_fmt = PIX_FMT_YUVJ444P;

  2026.         else

  2027.             int_pix_fmt = PIX_FMT_YUV444P;

  2028.     } else {

  2029.         /* the two formats are rgb or gray8 or yuv[j]444p */

  2030.         if (src_pix->is_alpha && dst_pix->is_alpha)

  2031.             int_pix_fmt = PIX_FMT_RGBA32;

  2032.         else

  2033.             int_pix_fmt = PIX_FMT_RGB24;

  2034.     }

  2035.     if (avpicture_alloc(tmp, int_pix_fmt, dst_width, dst_height) < 0)

  2036.         return -1;

  2037.     ret = -1;

  2038.     if (img_convert(tmp, int_pix_fmt,

  2039.                     src, src_pix_fmt, src_width, src_height) < 0)

  2040.         goto fail1;

  2041.     if (img_convert(dst, dst_pix_fmt,

  2042.                     tmp, int_pix_fmt, dst_width, dst_height) < 0)

  2043.         goto fail1;

  2044.     ret = 0;

  2045.  fail1:

  2046.     avpicture_free(tmp);

  2047.     return ret;

  2048. }

  2049. 

  2050. /* NOTE: we scan all the pixels to have an exact information */

  2051. static int get_alpha_info_pal8(const AVPicture *src, int width, int height)

  2052. {

  2053.     const unsigned char *p;

  2054.     int src_wrap, ret, x, y;

  2055.     unsigned int a;

  2056.     uint32_t *palette = (uint32_t *)src->data[1];

  2057.     

  2058.     p = src->data[0];

  2059.     src_wrap = src->linesize[0] - width;

  2060.     ret = 0;

  2061.     for(y=0;y<height;y++) {

  2062.         for(x=0;x<width;x++) {

  2063.             a = palette[p[0]] >> 24;

  2064.             if (a == 0x00) {

  2065.                 ret |= FF_ALPHA_TRANSP;

  2066.             } else if (a != 0xff) {

  2067.                 ret |= FF_ALPHA_SEMI_TRANSP;

  2068.             }

  2069.             p++;

  2070.         }

  2071.         p += src_wrap;

  2072.     }

  2073.     return ret;

  2074. }

  2075. 

  2076. /**

  2077.  * Tell if an image really has transparent alpha values.

  2078.  * @return ored mask of FF_ALPHA_xxx constants

  2079.  */

  2080. int img_get_alpha_info(const AVPicture *src,

  2081. 		       int pix_fmt, int width, int height)

  2082. {

  2083.     PixFmtInfo *pf = &pix_fmt_info[pix_fmt];

  2084.     int ret;

  2085. 

  2086.     pf = &pix_fmt_info[pix_fmt];

  2087.     /* no alpha can be represented in format */

  2088.     if (!pf->is_alpha)

  2089.         return 0;

  2090.     switch(pix_fmt) {

  2091.     case PIX_FMT_RGBA32:

  2092.         ret = get_alpha_info_rgba32(src, width, height);

  2093.         break;

  2094.     case PIX_FMT_RGB555:

  2095.         ret = get_alpha_info_rgb555(src, width, height);

  2096.         break;

  2097.     case PIX_FMT_PAL8:

  2098.         ret = get_alpha_info_pal8(src, width, height);

  2099.         break;

  2100.     default:

  2101.         /* we do not know, so everything is indicated */

  2102.         ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;

  2103.         break;

  2104.     }

  2105.     return ret;

  2106. }

  2107. 

  2108. #ifdef HAVE_MMX

  2109. #define DEINT_INPLACE_LINE_LUM \

  2110.                     movd_m2r(lum_m4[0],mm0);\

  2111.                     movd_m2r(lum_m3[0],mm1);\

  2112.                     movd_m2r(lum_m2[0],mm2);\

  2113.                     movd_m2r(lum_m1[0],mm3);\

  2114.                     movd_m2r(lum[0],mm4);\

  2115.                     punpcklbw_r2r(mm7,mm0);\

  2116.                     movd_r2m(mm2,lum_m4[0]);\

  2117.                     punpcklbw_r2r(mm7,mm1);\

  2118.                     punpcklbw_r2r(mm7,mm2);\

  2119.                     punpcklbw_r2r(mm7,mm3);\

  2120.                     punpcklbw_r2r(mm7,mm4);\

  2121.                     paddw_r2r(mm3,mm1);\

  2122.                     psllw_i2r(1,mm2);\

  2123.                     paddw_r2r(mm4,mm0);\

  2124.                     psllw_i2r(2,mm1);\

  2125.                     paddw_r2r(mm6,mm2);\

  2126.                     paddw_r2r(mm2,mm1);\

  2127.                     psubusw_r2r(mm0,mm1);\

  2128.                     psrlw_i2r(3,mm1);\

  2129.                     packuswb_r2r(mm7,mm1);\

  2130.                     movd_r2m(mm1,lum_m2[0]);

  2131. 

  2132. #define DEINT_LINE_LUM \

  2133.                     movd_m2r(lum_m4[0],mm0);\

  2134.                     movd_m2r(lum_m3[0],mm1);\

  2135.                     movd_m2r(lum_m2[0],mm2);\

  2136.                     movd_m2r(lum_m1[0],mm3);\

  2137.                     movd_m2r(lum[0],mm4);\

  2138.                     punpcklbw_r2r(mm7,mm0);\

  2139.                     punpcklbw_r2r(mm7,mm1);\

  2140.                     punpcklbw_r2r(mm7,mm2);\

  2141.                     punpcklbw_r2r(mm7,mm3);\

  2142.                     punpcklbw_r2r(mm7,mm4);\

  2143.                     paddw_r2r(mm3,mm1);\

  2144.                     psllw_i2r(1,mm2);\

  2145.                     paddw_r2r(mm4,mm0);\

  2146.                     psllw_i2r(2,mm1);\

  2147.                     paddw_r2r(mm6,mm2);\

  2148.                     paddw_r2r(mm2,mm1);\

  2149.                     psubusw_r2r(mm0,mm1);\

  2150.                     psrlw_i2r(3,mm1);\

  2151.                     packuswb_r2r(mm7,mm1);\

  2152.                     movd_r2m(mm1,dst[0]);

  2153. #endif

  2154. 

  2155. /* filter parameters: [-1 4 2 4 -1] // 8 */

  2156. static void deinterlace_line(uint8_t *dst, 

  2157. 			     const uint8_t *lum_m4, const uint8_t *lum_m3, 

  2158. 			     const uint8_t *lum_m2, const uint8_t *lum_m1, 

  2159. 			     const uint8_t *lum,

  2160. 			     int size)

  2161. {

  2162. #ifndef HAVE_MMX

  2163.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2164.     int sum;

  2165. 

  2166.     for(;size > 0;size--) {

  2167.         sum = -lum_m4[0];

  2168.         sum += lum_m3[0] << 2;

  2169.         sum += lum_m2[0] << 1;

  2170.         sum += lum_m1[0] << 2;

  2171.         sum += -lum[0];

  2172.         dst[0] = cm[(sum + 4) >> 3];

  2173.         lum_m4++;

  2174.         lum_m3++;

  2175.         lum_m2++;

  2176.         lum_m1++;

  2177.         lum++;

  2178.         dst++;

  2179.     }

  2180. #else

  2181. 

  2182.     {

  2183.         mmx_t rounder;

  2184.         rounder.uw[0]=4;

  2185.         rounder.uw[1]=4;

  2186.         rounder.uw[2]=4;

  2187.         rounder.uw[3]=4;

  2188.         pxor_r2r(mm7,mm7);

  2189.         movq_m2r(rounder,mm6);

  2190.     }

  2191.     for (;size > 3; size-=4) {

  2192.         DEINT_LINE_LUM

  2193.         lum_m4+=4;

  2194.         lum_m3+=4;

  2195.         lum_m2+=4;

  2196.         lum_m1+=4;

  2197.         lum+=4;

  2198.         dst+=4;

  2199.     }

  2200. #endif

  2201. }

  2202. static void deinterlace_line_inplace(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,

  2203.                              int size)

  2204. {

  2205. #ifndef HAVE_MMX

  2206.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2207.     int sum;

  2208. 

  2209.     for(;size > 0;size--) {

  2210.         sum = -lum_m4[0];

  2211.         sum += lum_m3[0] << 2;

  2212.         sum += lum_m2[0] << 1;

  2213.         lum_m4[0]=lum_m2[0];

  2214.         sum += lum_m1[0] << 2;

  2215.         sum += -lum[0];

  2216.         lum_m2[0] = cm[(sum + 4) >> 3];

  2217.         lum_m4++;

  2218.         lum_m3++;

  2219.         lum_m2++;

  2220.         lum_m1++;

  2221.         lum++;

  2222.     }

  2223. #else

  2224. 

  2225.     {

  2226.         mmx_t rounder;

  2227.         rounder.uw[0]=4;

  2228.         rounder.uw[1]=4;

  2229.         rounder.uw[2]=4;

  2230.         rounder.uw[3]=4;

  2231.         pxor_r2r(mm7,mm7);

  2232.         movq_m2r(rounder,mm6);

  2233.     }

  2234.     for (;size > 3; size-=4) {

  2235.         DEINT_INPLACE_LINE_LUM

  2236.         lum_m4+=4;

  2237.         lum_m3+=4;

  2238.         lum_m2+=4;

  2239.         lum_m1+=4;

  2240.         lum+=4;

  2241.     }

  2242. #endif

  2243. }

  2244. 

  2245. /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The

  2246.    top field is copied as is, but the bottom field is deinterlaced

  2247.    against the top field. */

  2248. static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,

  2249.                                     const uint8_t *src1, int src_wrap,

  2250.                                     int width, int height)

  2251. {

  2252.     const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;

  2253.     int y;

  2254. 

  2255.     src_m2 = src1;

  2256.     src_m1 = src1;

  2257.     src_0=&src_m1[src_wrap];

  2258.     src_p1=&src_0[src_wrap];

  2259.     src_p2=&src_p1[src_wrap];

  2260.     for(y=0;y<(height-2);y+=2) {

  2261.         memcpy(dst,src_m1,width);

  2262.         dst += dst_wrap;

  2263.         deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);

  2264.         src_m2 = src_0;

  2265.         src_m1 = src_p1;

  2266.         src_0 = src_p2;

  2267.         src_p1 += 2*src_wrap;

  2268.         src_p2 += 2*src_wrap;

  2269.         dst += dst_wrap;

  2270.     }

  2271.     memcpy(dst,src_m1,width);

  2272.     dst += dst_wrap;

  2273.     /* do last line */

  2274.     deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);

  2275. }

  2276. 

  2277. static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,

  2278. 					     int width, int height)

  2279. {

  2280.     uint8_t *src_m1, *src_0, *src_p1, *src_p2;

  2281.     int y;

  2282.     uint8_t *buf;

  2283.     buf = (uint8_t*)av_malloc(width);

  2284. 

  2285.     src_m1 = src1;

  2286.     memcpy(buf,src_m1,width);

  2287.     src_0=&src_m1[src_wrap];

  2288.     src_p1=&src_0[src_wrap];

  2289.     src_p2=&src_p1[src_wrap];

  2290.     for(y=0;y<(height-2);y+=2) {

  2291.         deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);

  2292.         src_m1 = src_p1;

  2293.         src_0 = src_p2;

  2294.         src_p1 += 2*src_wrap;

  2295.         src_p2 += 2*src_wrap;

  2296.     }

  2297.     /* do last line */

  2298.     deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);

  2299.     av_free(buf);

  2300. }

  2301. 

  2302. 

  2303. /* deinterlace - if not supported return -1 */

  2304. int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,

  2305.                           int pix_fmt, int width, int height)

  2306. {

  2307.     int i;

  2308. 

  2309.     if (pix_fmt != PIX_FMT_YUV420P &&

  2310.         pix_fmt != PIX_FMT_YUV422P &&

  2311.         pix_fmt != PIX_FMT_YUV444P &&

  2312. 	pix_fmt != PIX_FMT_YUV411P)

  2313.         return -1;

  2314.     if ((width & 3) != 0 || (height & 3) != 0)

  2315.         return -1;

  2316. 

  2317.     for(i=0;i<3;i++) {

  2318.         if (i == 1) {

  2319.             switch(pix_fmt) {

  2320.             case PIX_FMT_YUV420P:

  2321.                 width >>= 1;

  2322.                 height >>= 1;

  2323.                 break;

  2324.             case PIX_FMT_YUV422P:

  2325.                 width >>= 1;

  2326.                 break;

  2327.             case PIX_FMT_YUV411P:

  2328.                 width >>= 2;

  2329.                 break;

  2330.             default:

  2331.                 break;

  2332.             }

  2333.         }

  2334.         if (src == dst) {

  2335.             deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],

  2336.                                  width, height);

  2337.         } else {

  2338.             deinterlace_bottom_field(dst->data[i],dst->linesize[i],

  2339.                                         src->data[i], src->linesize[i],

  2340.                                         width, height);

  2341.         }

  2342.     }

  2343. #ifdef HAVE_MMX

  2344.     emms();

  2345. #endif

  2346.     return 0;

  2347. }

  2348. 

  2349. #undef FIX