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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.     [PIX_FMT_UYVY411] = {

  231.         .name = "uyvy411",

  232.         .nb_channels = 1,

  233.         .color_type = FF_COLOR_YUV,

  234.         .pixel_type = FF_PIXEL_PACKED,

  235.         .depth = 8,

  236.         .x_chroma_shift = 2, .y_chroma_shift = 0,

  237.     },

  238. };

  239. 

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

  241. {

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

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

  244. }

  245. 

  246. const char *avcodec_get_pix_fmt_name(int pix_fmt)

  247. {

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

  249.         return "???";

  250.     else

  251.         return pix_fmt_info[pix_fmt].name;

  252. }

  253. 

  254. enum PixelFormat avcodec_get_pix_fmt(const char* name)

  255. {

  256.     int i; 

  257.     

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

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

  260. 	     break;

  261.     return i;

  262. }

  263. 

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

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

  266. 		   int pix_fmt, int width, int height)

  267. {

  268.     int size, w2, h2, size2;

  269.     PixFmtInfo *pinfo;

  270.     

  271.     if(avcodec_check_dimensions(NULL, width, height))

  272.         goto fail;

  273. 

  274.     pinfo = &pix_fmt_info[pix_fmt];

  275.     size = width * height;

  276.     switch(pix_fmt) {

  277.     case PIX_FMT_YUV420P:

  278.     case PIX_FMT_YUV422P:

  279.     case PIX_FMT_YUV444P:

  280.     case PIX_FMT_YUV410P:

  281.     case PIX_FMT_YUV411P:

  282.     case PIX_FMT_YUVJ420P:

  283.     case PIX_FMT_YUVJ422P:

  284.     case PIX_FMT_YUVJ444P:

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

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

  287.         size2 = w2 * h2;

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

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

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

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

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

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

  294.         return size + 2 * size2;

  295.     case PIX_FMT_RGB24:

  296.     case PIX_FMT_BGR24:

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

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

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

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

  301.         return size * 3;

  302.     case PIX_FMT_RGBA32:

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

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

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

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

  307.         return size * 4;

  308.     case PIX_FMT_RGB555:

  309.     case PIX_FMT_RGB565:

  310.     case PIX_FMT_YUV422:

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

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

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

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

  315.         return size * 2;

  316.     case PIX_FMT_UYVY422:

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

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

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

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

  321.         return size * 2;

  322.     case PIX_FMT_UYVY411:

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

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

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

  326.         picture->linesize[0] = width + width/2;

  327.         return size + size/2;

  328.     case PIX_FMT_GRAY8:

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

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

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

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

  333.         return size;

  334.     case PIX_FMT_MONOWHITE:

  335.     case PIX_FMT_MONOBLACK:

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

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

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

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

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

  341.     case PIX_FMT_PAL8:

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

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

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

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

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

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

  348.         return size2 + 256 * 4;

  349.     default:

  350. fail:

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

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

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

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

  355.         return -1;

  356.     }

  357. }

  358. 

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

  360.                      unsigned char *dest, int dest_size)

  361. {

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

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

  364.     const unsigned char* s; 

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

  366. 

  367.     if (size > dest_size || size < 0)

  368.         return -1;

  369. 

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

  371.         if (pix_fmt == PIX_FMT_YUV422 || 

  372.             pix_fmt == PIX_FMT_UYVY422 || 

  373.             pix_fmt == PIX_FMT_RGB565 ||

  374.             pix_fmt == PIX_FMT_RGB555)

  375.             w = width * 2;

  376. 	else if (pix_fmt == PIX_FMT_UYVY411)

  377. 	  w = width + width/2;

  378. 	else if (pix_fmt == PIX_FMT_PAL8)

  379. 	  w = width;

  380. 	else

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

  382. 	  

  383. 	data_planes = 1;

  384. 	h = height;

  385.     } else {

  386.         data_planes = pf->nb_channels;

  387. 	w = (width*pf->depth + 7)/8;

  388. 	h = height;

  389.     }

  390.     

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

  392.          if (i == 1) {

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

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

  395. 	 }

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

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

  398. 	     memcpy(dest, s, w);

  399. 	     dest += w;

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

  401. 	 }

  402.     }

  403.     

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

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

  406.     

  407.     return size;

  408. }

  409. 

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

  411. {

  412.     AVPicture dummy_pict;

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

  414. }

  415. 

  416. /**

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

  418.  */

  419. int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,

  420.                              int has_alpha)

  421. {

  422.     const PixFmtInfo *pf, *ps;

  423.     int loss;

  424. 

  425.     ps = &pix_fmt_info[src_pix_fmt];

  426.     pf = &pix_fmt_info[dst_pix_fmt];

  427. 

  428.     /* compute loss */

  429.     loss = 0;

  430.     pf = &pix_fmt_info[dst_pix_fmt];

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

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

  433.         loss |= FF_LOSS_DEPTH;

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

  435.         pf->y_chroma_shift > ps->y_chroma_shift)

  436.         loss |= FF_LOSS_RESOLUTION;

  437.     switch(pf->color_type) {

  438.     case FF_COLOR_RGB:

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

  440.             ps->color_type != FF_COLOR_GRAY)

  441.             loss |= FF_LOSS_COLORSPACE;

  442.         break;

  443.     case FF_COLOR_GRAY:

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

  445.             loss |= FF_LOSS_COLORSPACE;

  446.         break;

  447.     case FF_COLOR_YUV:

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

  449.             loss |= FF_LOSS_COLORSPACE;

  450.         break;

  451.     case FF_COLOR_YUV_JPEG:

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

  453.             ps->color_type != FF_COLOR_YUV && 

  454.             ps->color_type != FF_COLOR_GRAY)

  455.             loss |= FF_LOSS_COLORSPACE;

  456.         break;

  457.     default:

  458.         /* fail safe test */

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

  460.             loss |= FF_LOSS_COLORSPACE;

  461.         break;

  462.     }

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

  464.         ps->color_type != FF_COLOR_GRAY)

  465.         loss |= FF_LOSS_CHROMA;

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

  467.         loss |= FF_LOSS_ALPHA;

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

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

  470.         loss |= FF_LOSS_COLORQUANT;

  471.     return loss;

  472. }

  473. 

  474. static int avg_bits_per_pixel(int pix_fmt)

  475. {

  476.     int bits;

  477.     const PixFmtInfo *pf;

  478. 

  479.     pf = &pix_fmt_info[pix_fmt];

  480.     switch(pf->pixel_type) {

  481.     case FF_PIXEL_PACKED:

  482.         switch(pix_fmt) {

  483.         case PIX_FMT_YUV422:

  484.         case PIX_FMT_UYVY422:

  485.         case PIX_FMT_RGB565:

  486.         case PIX_FMT_RGB555:

  487.             bits = 16;

  488.             break;

  489. 	case PIX_FMT_UYVY411:

  490. 	    bits = 12;

  491. 	    break;

  492.         default:

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

  494.             break;

  495.         }

  496.         break;

  497.     case FF_PIXEL_PLANAR:

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

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

  500.         } else {

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

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

  503.         }

  504.         break;

  505.     case FF_PIXEL_PALETTE:

  506.         bits = 8;

  507.         break;

  508.     default:

  509.         bits = -1;

  510.         break;

  511.     }

  512.     return bits;

  513. }

  514. 

  515. static int avcodec_find_best_pix_fmt1(int pix_fmt_mask, 

  516.                                       int src_pix_fmt,

  517.                                       int has_alpha,

  518.                                       int loss_mask)

  519. {

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

  521. 

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

  523.     dst_pix_fmt = -1;

  524.     min_dist = 0x7fffffff;

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

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

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

  528.             if (loss == 0) {

  529.                 dist = avg_bits_per_pixel(i);

  530.                 if (dist < min_dist) {

  531.                     min_dist = dist;

  532.                     dst_pix_fmt = i;

  533.                 }

  534.             }

  535.         }

  536.     }

  537.     return dst_pix_fmt;

  538. }

  539. 

  540. /** 

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

  542.  */

  543. int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,

  544.                               int has_alpha, int *loss_ptr)

  545. {

  546.     int dst_pix_fmt, loss_mask, i;

  547.     static const int loss_mask_order[] = {

  548.         ~0, /* no loss first */

  549.         ~FF_LOSS_ALPHA,

  550.         ~FF_LOSS_RESOLUTION,

  551.         ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),

  552.         ~FF_LOSS_COLORQUANT,

  553.         ~FF_LOSS_DEPTH,

  554.         0,

  555.     };

  556. 

  557.     /* try with successive loss */

  558.     i = 0;

  559.     for(;;) {

  560.         loss_mask = loss_mask_order[i++];

  561.         dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt, 

  562.                                                  has_alpha, loss_mask);

  563.         if (dst_pix_fmt >= 0)

  564.             goto found;

  565.         if (loss_mask == 0)

  566.             break;

  567.     }

  568.     return -1;

  569.  found:

  570.     if (loss_ptr)

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

  572.     return dst_pix_fmt;

  573. }

  574. 

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

  576.                            const uint8_t *src, int src_wrap,

  577.                            int width, int height)

  578. {

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

  580.         memcpy(dst, src, width);

  581.         dst += dst_wrap;

  582.         src += src_wrap;

  583.     }

  584. }

  585. 

  586. /**

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

  588.  */

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

  590.               int pix_fmt, int width, int height)

  591. {

  592.     int bwidth, bits, i;

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

  594.     

  595.     pf = &pix_fmt_info[pix_fmt];

  596.     switch(pf->pixel_type) {

  597.     case FF_PIXEL_PACKED:

  598.         switch(pix_fmt) {

  599.         case PIX_FMT_YUV422:

  600.         case PIX_FMT_UYVY422:

  601.         case PIX_FMT_RGB565:

  602.         case PIX_FMT_RGB555:

  603.             bits = 16;

  604.             break;

  605. 	case PIX_FMT_UYVY411:

  606. 	    bits = 12;

  607. 	    break;

  608.         default:

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

  610.             break;

  611.         }

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

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

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

  615.                        bwidth, height);

  616.         break;

  617.     case FF_PIXEL_PLANAR:

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

  619.             int w, h;

  620.             w = width;

  621.             h = height;

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

  623.                 w >>= pf->x_chroma_shift;

  624.                 h >>= pf->y_chroma_shift;

  625.             }

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

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

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

  629.                            bwidth, h);

  630.         }

  631.         break;

  632.     case FF_PIXEL_PALETTE:

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

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

  635.                        width, height);

  636.         /* copy the palette */

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

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

  639.                        4, 256);

  640.         break;

  641.     }

  642. }

  643. 

  644. /* XXX: totally non optimized */

  645. 

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

  647.                               int width, int height)

  648. {

  649.     const uint8_t *p, *p1;

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

  651.     int w;

  652.  

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

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

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

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

  657. 

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

  659.         p = p1;

  660.         lum = lum1;

  661.         cb = cb1;

  662.         cr = cr1;

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

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

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

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

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

  668.             p += 4;

  669.             lum += 2;

  670.             cb++;

  671.             cr++;

  672.         }

  673.         if (w) {

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

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

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

  677.             cb++;

  678.             cr++;

  679.         }

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

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

  682.         if (height>1) {

  683.             p = p1;

  684.             lum = lum1;

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

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

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

  688.                 p += 4;

  689.                 lum += 2;

  690.             }

  691.             if (w) {

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

  693.             }

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

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

  696.         }

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

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

  699.     }

  700. }

  701. 

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

  703.                               int width, int height)

  704. {

  705.     const uint8_t *p, *p1;

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

  707.     int w;

  708.  

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

  710.     

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

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

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

  714. 

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

  716.         p = p1;

  717.         lum = lum1;

  718.         cb = cb1;

  719.         cr = cr1;

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

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

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

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

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

  725.             p += 4;

  726.             lum += 2;

  727.             cb++;

  728.             cr++;

  729.         }

  730.         if (w) {

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

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

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

  734.             cb++;

  735.             cr++;

  736.         }

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

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

  739.         if (height>1) {

  740.             p = p1;

  741.             lum = lum1;

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

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

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

  745.                 p += 4;

  746.                 lum += 2;

  747.             }

  748.             if (w) {

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

  750.             }

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

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

  753.         }

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

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

  756.     }

  757. }

  758. 

  759. 

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

  761.                               int width, int height)

  762. {

  763.     const uint8_t *p, *p1;

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

  765.     int w;

  766. 

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

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

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

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

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

  772.         p = p1;

  773.         lum = lum1;

  774.         cb = cb1;

  775.         cr = cr1;

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

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

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

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

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

  781.             p += 4;

  782.             lum += 2;

  783.             cb++;

  784.             cr++;

  785.         }

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

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

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

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

  790.     }

  791. }

  792. 

  793. 

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

  795.                               int width, int height)

  796. {

  797.     const uint8_t *p, *p1;

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

  799.     int w;

  800. 

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

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

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

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

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

  806.         p = p1;

  807.         lum = lum1;

  808.         cb = cb1;

  809.         cr = cr1;

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

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

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

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

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

  815.             p += 4;

  816.             lum += 2;

  817.             cb++;

  818.             cr++;

  819.         }

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

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

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

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

  824.     }

  825. }

  826. 

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

  828.                               int width, int height)

  829. {

  830.     uint8_t *p, *p1;

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

  832.     int w;

  833. 

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

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

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

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

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

  839.         p = p1;

  840.         lum = lum1;

  841.         cb = cb1;

  842.         cr = cr1;

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

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

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

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

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

  848.             p += 4;

  849.             lum += 2;

  850.             cb++;

  851.             cr++;

  852.         }

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

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

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

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

  857.     }

  858. }

  859. 

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

  861.                               int width, int height)

  862. {

  863.     uint8_t *p, *p1;

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

  865.     int w;

  866. 

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

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

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

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

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

  872.         p = p1;

  873.         lum = lum1;

  874.         cb = cb1;

  875.         cr = cr1;

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

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

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

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

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

  881.             p += 4;

  882.             lum += 2;

  883.             cb++;

  884.             cr++;

  885.         }

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

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

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

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

  890.     }

  891. }

  892. 

  893. static void uyvy411_to_yuv411p(AVPicture *dst, const AVPicture *src,

  894.                               int width, int height)

  895. {

  896.     const uint8_t *p, *p1;

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

  898.     int w;

  899. 

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

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

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

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

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

  905.         p = p1;

  906.         lum = lum1;

  907.         cb = cb1;

  908.         cr = cr1;

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

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

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

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

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

  914. 	    lum[2] = p[4];

  915. 	    lum[3] = p[5];

  916.             p += 6;

  917.             lum += 4;

  918.             cb++;

  919.             cr++;

  920.         }

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

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

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

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

  925.     }

  926. }

  927. 

  928. 

  929. static void yuv420p_to_yuv422(AVPicture *dst, const AVPicture *src,

  930.                               int width, int height)

  931. {

  932.     int w, h;

  933.     uint8_t *line1, *line2, *linesrc = dst->data[0];

  934.     uint8_t *lum1, *lum2, *lumsrc = src->data[0];

  935.     uint8_t *cb1, *cb2 = src->data[1];

  936.     uint8_t *cr1, *cr2 = src->data[2];

  937.     

  938.     for(h = height / 2; h--;) {

  939.         line1 = linesrc;

  940.         line2 = linesrc + dst->linesize[0];

  941.         

  942.         lum1 = lumsrc;

  943.         lum2 = lumsrc + src->linesize[0];

  944.         

  945.         cb1 = cb2;

  946.         cr1 = cr2;

  947.         

  948.         for(w = width / 2; w--;) {

  949.                 *line1++ = *lum1++; *line2++ = *lum2++;                     

  950.                 *line1++ =          *line2++ = *cb1++;                      

  951.                 *line1++ = *lum1++; *line2++ = *lum2++;                     

  952.                 *line1++ =          *line2++ = *cr1++;

  953.         }

  954.         

  955.         linesrc += dst->linesize[0] * 2;

  956.         lumsrc += src->linesize[0] * 2;

  957.         cb2 += src->linesize[1];

  958.         cr2 += src->linesize[2];

  959.     }

  960. }

  961. 

  962. static void yuv420p_to_uyvy422(AVPicture *dst, const AVPicture *src,

  963.                               int width, int height)

  964. {

  965.     int w, h;

  966.     uint8_t *line1, *line2, *linesrc = dst->data[0];

  967.     uint8_t *lum1, *lum2, *lumsrc = src->data[0];

  968.     uint8_t *cb1, *cb2 = src->data[1];

  969.     uint8_t *cr1, *cr2 = src->data[2];

  970.     

  971.     for(h = height / 2; h--;) {

  972.         line1 = linesrc;

  973.         line2 = linesrc + dst->linesize[0];

  974.         

  975.         lum1 = lumsrc;

  976.         lum2 = lumsrc + src->linesize[0];

  977.         

  978.         cb1 = cb2;

  979.         cr1 = cr2;

  980.         

  981.         for(w = width / 2; w--;) {

  982.                 *line1++ =          *line2++ = *cb1++;                      

  983.                 *line1++ = *lum1++; *line2++ = *lum2++;                     

  984.                 *line1++ =          *line2++ = *cr1++;

  985.                 *line1++ = *lum1++; *line2++ = *lum2++;                     

  986.         }

  987.         

  988.         linesrc += dst->linesize[0] * 2;

  989.         lumsrc += src->linesize[0] * 2;

  990.         cb2 += src->linesize[1];

  991.         cr2 += src->linesize[2];

  992.     }

  993. }

  994. 

  995. #define SCALEBITS 10

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

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

  998. 

  999. #define YUV_TO_RGB1_CCIR(cb1, cr1)\

  1000. {\

  1001.     cb = (cb1) - 128;\

  1002.     cr = (cr1) - 128;\

  1003.     r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\

  1004.     g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \

  1005.             ONE_HALF;\

  1006.     b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\

  1007. }

  1008. 

  1009. #define YUV_TO_RGB2_CCIR(r, g, b, y1)\

  1010. {\

  1011.     y = ((y1) - 16) * FIX(255.0/219.0);\

  1012.     r = cm[(y + r_add) >> SCALEBITS];\

  1013.     g = cm[(y + g_add) >> SCALEBITS];\

  1014.     b = cm[(y + b_add) >> SCALEBITS];\

  1015. }

  1016. 

  1017. #define YUV_TO_RGB1(cb1, cr1)\

  1018. {\

  1019.     cb = (cb1) - 128;\

  1020.     cr = (cr1) - 128;\

  1021.     r_add = FIX(1.40200) * cr + ONE_HALF;\

  1022.     g_add = - FIX(0.34414) * cb - FIX(0.71414) * cr + ONE_HALF;\

  1023.     b_add = FIX(1.77200) * cb + ONE_HALF;\

  1024. }

  1025. 

  1026. #define YUV_TO_RGB2(r, g, b, y1)\

  1027. {\

  1028.     y = (y1) << SCALEBITS;\

  1029.     r = cm[(y + r_add) >> SCALEBITS];\

  1030.     g = cm[(y + g_add) >> SCALEBITS];\

  1031.     b = cm[(y + b_add) >> SCALEBITS];\

  1032. }

  1033. 

  1034. #define Y_CCIR_TO_JPEG(y)\

  1035.  cm[((y) * FIX(255.0/219.0) + (ONE_HALF - 16 * FIX(255.0/219.0))) >> SCALEBITS]

  1036. 

  1037. #define Y_JPEG_TO_CCIR(y)\

  1038.  (((y) * FIX(219.0/255.0) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)

  1039. 

  1040. #define C_CCIR_TO_JPEG(y)\

  1041.  cm[(((y) - 128) * FIX(127.0/112.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS]

  1042. 

  1043. /* NOTE: the clamp is really necessary! */

  1044. static inline int C_JPEG_TO_CCIR(int y) {

  1045.     y = (((y - 128) * FIX(112.0/127.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS);

  1046.     if (y < 16)

  1047. 	y = 16;

  1048.     return y;

  1049. }

  1050. 

  1051. 

  1052. #define RGB_TO_Y(r, g, b) \

  1053. ((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \

  1054.   FIX(0.11400) * (b) + ONE_HALF) >> SCALEBITS)

  1055. 

  1056. #define RGB_TO_U(r1, g1, b1, shift)\

  1057. (((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +         \

  1058.      FIX(0.50000) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  1059. 

  1060. #define RGB_TO_V(r1, g1, b1, shift)\

  1061. (((FIX(0.50000) * r1 - FIX(0.41869) * g1 -           \

  1062.    FIX(0.08131) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  1063. 

  1064. #define RGB_TO_Y_CCIR(r, g, b) \

  1065. ((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \

  1066.   FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)

  1067. 

  1068. #define RGB_TO_U_CCIR(r1, g1, b1, shift)\

  1069. (((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 +         \

  1070.      FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  1071. 

  1072. #define RGB_TO_V_CCIR(r1, g1, b1, shift)\

  1073. (((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 -           \

  1074.    FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  1075. 

  1076. static uint8_t y_ccir_to_jpeg[256];

  1077. static uint8_t y_jpeg_to_ccir[256];

  1078. static uint8_t c_ccir_to_jpeg[256];

  1079. static uint8_t c_jpeg_to_ccir[256];

  1080. 

  1081. /* init various conversion tables */

  1082. static void img_convert_init(void)

  1083. {

  1084.     int i;

  1085.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  1086. 

  1087.     for(i = 0;i < 256; i++) {

  1088.         y_ccir_to_jpeg[i] = Y_CCIR_TO_JPEG(i);

  1089.         y_jpeg_to_ccir[i] = Y_JPEG_TO_CCIR(i);

  1090.         c_ccir_to_jpeg[i] = C_CCIR_TO_JPEG(i);

  1091.         c_jpeg_to_ccir[i] = C_JPEG_TO_CCIR(i);

  1092.     }

  1093. }

  1094. 

  1095. /* apply to each pixel the given table */

  1096. static void img_apply_table(uint8_t *dst, int dst_wrap, 

  1097.                             const uint8_t *src, int src_wrap,

  1098.                             int width, int height, const uint8_t *table1)

  1099. {

  1100.     int n;

  1101.     const uint8_t *s;

  1102.     uint8_t *d;

  1103.     const uint8_t *table;

  1104. 

  1105.     table = table1;

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

  1107.         s = src;

  1108.         d = dst;

  1109.         n = width;

  1110.         while (n >= 4) {

  1111.             d[0] = table[s[0]];

  1112.             d[1] = table[s[1]];

  1113.             d[2] = table[s[2]];

  1114.             d[3] = table[s[3]];

  1115.             d += 4;

  1116.             s += 4;

  1117.             n -= 4;

  1118.         }

  1119.         while (n > 0) {

  1120.             d[0] = table[s[0]];

  1121.             d++;

  1122.             s++;

  1123.             n--;

  1124.         }

  1125.         dst += dst_wrap;

  1126.         src += src_wrap;

  1127.     }

  1128. }

  1129. 

  1130. /* XXX: use generic filter ? */

  1131. /* XXX: in most cases, the sampling position is incorrect */

  1132. 

  1133. /* 4x1 -> 1x1 */

  1134. static void shrink41(uint8_t *dst, int dst_wrap, 

  1135.                      const uint8_t *src, int src_wrap,

  1136.                      int width, int height)

  1137. {

  1138.     int w;

  1139.     const uint8_t *s;

  1140.     uint8_t *d;

  1141. 

  1142.     for(;height > 0; height--) {

  1143.         s = src;

  1144.         d = dst;

  1145.         for(w = width;w > 0; w--) {

  1146.             d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2;

  1147.             s += 4;

  1148.             d++;

  1149.         }

  1150.         src += src_wrap;

  1151.         dst += dst_wrap;

  1152.     }

  1153. }

  1154. 

  1155. /* 2x1 -> 1x1 */

  1156. static void shrink21(uint8_t *dst, int dst_wrap, 

  1157.                      const uint8_t *src, int src_wrap,

  1158.                      int width, int height)

  1159. {

  1160.     int w;

  1161.     const uint8_t *s;

  1162.     uint8_t *d;

  1163. 

  1164.     for(;height > 0; height--) {

  1165.         s = src;

  1166.         d = dst;

  1167.         for(w = width;w > 0; w--) {

  1168.             d[0] = (s[0] + s[1]) >> 1;

  1169.             s += 2;

  1170.             d++;

  1171.         }

  1172.         src += src_wrap;

  1173.         dst += dst_wrap;

  1174.     }

  1175. }

  1176. 

  1177. /* 1x2 -> 1x1 */

  1178. static void shrink12(uint8_t *dst, int dst_wrap, 

  1179.                      const uint8_t *src, int src_wrap,

  1180.                      int width, int height)

  1181. {

  1182.     int w;

  1183.     uint8_t *d;

  1184.     const uint8_t *s1, *s2;

  1185. 

  1186.     for(;height > 0; height--) {

  1187.         s1 = src;

  1188.         s2 = s1 + src_wrap;

  1189.         d = dst;

  1190.         for(w = width;w >= 4; w-=4) {

  1191.             d[0] = (s1[0] + s2[0]) >> 1;

  1192.             d[1] = (s1[1] + s2[1]) >> 1;

  1193.             d[2] = (s1[2] + s2[2]) >> 1;

  1194.             d[3] = (s1[3] + s2[3]) >> 1;

  1195.             s1 += 4;

  1196.             s2 += 4;

  1197.             d += 4;

  1198.         }

  1199.         for(;w > 0; w--) {

  1200.             d[0] = (s1[0] + s2[0]) >> 1;

  1201.             s1++;

  1202.             s2++;

  1203.             d++;

  1204.         }

  1205.         src += 2 * src_wrap;

  1206.         dst += dst_wrap;

  1207.     }

  1208. }

  1209. 

  1210. /* 2x2 -> 1x1 */

  1211. static void shrink22(uint8_t *dst, int dst_wrap, 

  1212.                      const uint8_t *src, int src_wrap,

  1213.                      int width, int height)

  1214. {

  1215.     int w;

  1216.     const uint8_t *s1, *s2;

  1217.     uint8_t *d;

  1218. 

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

  1220.         s1 = src;

  1221.         s2 = s1 + src_wrap;

  1222.         d = dst;

  1223.         for(w = width;w >= 4; w-=4) {

  1224.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  1225.             d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;

  1226.             d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;

  1227.             d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;

  1228.             s1 += 8;

  1229.             s2 += 8;

  1230.             d += 4;

  1231.         }

  1232.         for(;w > 0; w--) {

  1233.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  1234.             s1 += 2;

  1235.             s2 += 2;

  1236.             d++;

  1237.         }

  1238.         src += 2 * src_wrap;

  1239.         dst += dst_wrap;

  1240.     }

  1241. }

  1242. 

  1243. /* 4x4 -> 1x1 */

  1244. static void shrink44(uint8_t *dst, int dst_wrap, 

  1245.                      const uint8_t *src, int src_wrap,

  1246.                      int width, int height)

  1247. {

  1248.     int w;

  1249.     const uint8_t *s1, *s2, *s3, *s4;

  1250.     uint8_t *d;

  1251. 

  1252.     for(;height > 0; height--) {

  1253.         s1 = src;

  1254.         s2 = s1 + src_wrap;

  1255.         s3 = s2 + src_wrap;

  1256.         s4 = s3 + src_wrap;

  1257.         d = dst;

  1258.         for(w = width;w > 0; w--) {

  1259.             d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +

  1260.                     s2[0] + s2[1] + s2[2] + s2[3] +

  1261.                     s3[0] + s3[1] + s3[2] + s3[3] +

  1262.                     s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;

  1263.             s1 += 4;

  1264.             s2 += 4;

  1265.             s3 += 4;

  1266.             s4 += 4;

  1267.             d++;

  1268.         }

  1269.         src += 4 * src_wrap;

  1270.         dst += dst_wrap;

  1271.     }

  1272. }

  1273. 

  1274. static void grow21_line(uint8_t *dst, const uint8_t *src,

  1275.                         int width)

  1276. {

  1277.     int w;

  1278.     const uint8_t *s1;

  1279.     uint8_t *d;

  1280. 

  1281.     s1 = src;

  1282.     d = dst;

  1283.     for(w = width;w >= 4; w-=4) {

  1284.         d[1] = d[0] = s1[0];

  1285.         d[3] = d[2] = s1[1];

  1286.         s1 += 2;

  1287.         d += 4;

  1288.     }

  1289.     for(;w >= 2; w -= 2) {

  1290.         d[1] = d[0] = s1[0];

  1291.         s1 ++;

  1292.         d += 2;

  1293.     }

  1294.     /* only needed if width is not a multiple of two */

  1295.     /* XXX: veryfy that */

  1296.     if (w) {

  1297.         d[0] = s1[0];

  1298.     }

  1299. }

  1300. 

  1301. static void grow41_line(uint8_t *dst, const uint8_t *src,

  1302.                         int width)

  1303. {

  1304.     int w, v;

  1305.     const uint8_t *s1;

  1306.     uint8_t *d;

  1307. 

  1308.     s1 = src;

  1309.     d = dst;

  1310.     for(w = width;w >= 4; w-=4) {

  1311.         v = s1[0];

  1312.         d[0] = v;

  1313.         d[1] = v;

  1314.         d[2] = v;

  1315.         d[3] = v;

  1316.         s1 ++;

  1317.         d += 4;

  1318.     }

  1319. }

  1320. 

  1321. /* 1x1 -> 2x1 */

  1322. static void grow21(uint8_t *dst, int dst_wrap,

  1323.                    const uint8_t *src, int src_wrap,

  1324.                    int width, int height)

  1325. {

  1326.     for(;height > 0; height--) {

  1327.         grow21_line(dst, src, width);

  1328.         src += src_wrap;

  1329.         dst += dst_wrap;

  1330.     }

  1331. }

  1332. 

  1333. /* 1x1 -> 2x2 */

  1334. static void grow22(uint8_t *dst, int dst_wrap,

  1335.                    const uint8_t *src, int src_wrap,

  1336.                    int width, int height)

  1337. {

  1338.     for(;height > 0; height--) {

  1339.         grow21_line(dst, src, width);

  1340.         if (height%2)

  1341.             src += src_wrap;

  1342.         dst += dst_wrap;

  1343.     }

  1344. }

  1345. 

  1346. /* 1x1 -> 4x1 */

  1347. static void grow41(uint8_t *dst, int dst_wrap,

  1348.                    const uint8_t *src, int src_wrap,

  1349.                    int width, int height)

  1350. {

  1351.     for(;height > 0; height--) {

  1352.         grow41_line(dst, src, width);

  1353.         src += src_wrap;

  1354.         dst += dst_wrap;

  1355.     }

  1356. }

  1357. 

  1358. /* 1x1 -> 4x4 */

  1359. static void grow44(uint8_t *dst, int dst_wrap,

  1360.                    const uint8_t *src, int src_wrap,

  1361.                    int width, int height)

  1362. {

  1363.     for(;height > 0; height--) {

  1364.         grow41_line(dst, src, width);

  1365.         if ((height & 3) == 1)

  1366.             src += src_wrap;

  1367.         dst += dst_wrap;

  1368.     }

  1369. }

  1370. 

  1371. /* 1x2 -> 2x1 */

  1372. static void conv411(uint8_t *dst, int dst_wrap, 

  1373.                     const uint8_t *src, int src_wrap,

  1374.                     int width, int height)

  1375. {

  1376.     int w, c;

  1377.     const uint8_t *s1, *s2;

  1378.     uint8_t *d;

  1379. 

  1380.     width>>=1;

  1381. 

  1382.     for(;height > 0; height--) {

  1383.         s1 = src;

  1384.         s2 = src + src_wrap;

  1385.         d = dst;

  1386.         for(w = width;w > 0; w--) {

  1387.             c = (s1[0] + s2[0]) >> 1;

  1388.             d[0] = c;

  1389.             d[1] = c;

  1390.             s1++;

  1391.             s2++;

  1392.             d += 2;

  1393.         }

  1394.         src += src_wrap * 2;

  1395.         dst += dst_wrap;

  1396.     }

  1397. }

  1398. 

  1399. /* XXX: add jpeg quantize code */

  1400. 

  1401. #define TRANSP_INDEX (6*6*6)

  1402. 

  1403. /* this is maybe slow, but allows for extensions */

  1404. static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)

  1405. {

  1406.     return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));

  1407. }

  1408. 

  1409. static void build_rgb_palette(uint8_t *palette, int has_alpha)

  1410. {

  1411.     uint32_t *pal;

  1412.     static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };

  1413.     int i, r, g, b;

  1414. 

  1415.     pal = (uint32_t *)palette;

  1416.     i = 0;

  1417.     for(r = 0; r < 6; r++) {

  1418.         for(g = 0; g < 6; g++) {

  1419.             for(b = 0; b < 6; b++) {

  1420.                 pal[i++] = (0xff << 24) | (pal_value[r] << 16) | 

  1421.                     (pal_value[g] << 8) | pal_value[b];

  1422.             }

  1423.         }

  1424.     }

  1425.     if (has_alpha)

  1426.         pal[i++] = 0;

  1427.     while (i < 256)

  1428.         pal[i++] = 0xff000000;

  1429. }

  1430. 

  1431. /* copy bit n to bits 0 ... n - 1 */

  1432. static inline unsigned int bitcopy_n(unsigned int a, int n)

  1433. {

  1434.     int mask;

  1435.     mask = (1 << n) - 1;

  1436.     return (a & (0xff & ~mask)) | ((-((a >> n) & 1)) & mask);

  1437. }

  1438. 

  1439. /* rgb555 handling */

  1440. 

  1441. #define RGB_NAME rgb555

  1442. 

  1443. #define RGB_IN(r, g, b, s)\

  1444. {\

  1445.     unsigned int v = ((const uint16_t *)(s))[0];\

  1446.     r = bitcopy_n(v >> (10 - 3), 3);\

  1447.     g = bitcopy_n(v >> (5 - 3), 3);\

  1448.     b = bitcopy_n(v << 3, 3);\

  1449. }

  1450. 

  1451. #define RGBA_IN(r, g, b, a, s)\

  1452. {\

  1453.     unsigned int v = ((const uint16_t *)(s))[0];\

  1454.     r = bitcopy_n(v >> (10 - 3), 3);\

  1455.     g = bitcopy_n(v >> (5 - 3), 3);\

  1456.     b = bitcopy_n(v << 3, 3);\

  1457.     a = (-(v >> 15)) & 0xff;\

  1458. }

  1459. 

  1460. #define RGBA_OUT(d, r, g, b, a)\

  1461. {\

  1462.     ((uint16_t *)(d))[0] = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3) | \

  1463.                            ((a << 8) & 0x8000);\

  1464. }

  1465. 

  1466. #define BPP 2

  1467. 

  1468. #include "imgconvert_template.h"

  1469. 

  1470. /* rgb565 handling */

  1471. 

  1472. #define RGB_NAME rgb565

  1473. 

  1474. #define RGB_IN(r, g, b, s)\

  1475. {\

  1476.     unsigned int v = ((const uint16_t *)(s))[0];\

  1477.     r = bitcopy_n(v >> (11 - 3), 3);\

  1478.     g = bitcopy_n(v >> (5 - 2), 2);\

  1479.     b = bitcopy_n(v << 3, 3);\

  1480. }

  1481. 

  1482. #define RGB_OUT(d, r, g, b)\

  1483. {\

  1484.     ((uint16_t *)(d))[0] = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);\

  1485. }

  1486. 

  1487. #define BPP 2

  1488. 

  1489. #include "imgconvert_template.h"

  1490. 

  1491. /* bgr24 handling */

  1492. 

  1493. #define RGB_NAME bgr24

  1494. 

  1495. #define RGB_IN(r, g, b, s)\

  1496. {\

  1497.     b = (s)[0];\

  1498.     g = (s)[1];\

  1499.     r = (s)[2];\

  1500. }

  1501. 

  1502. #define RGB_OUT(d, r, g, b)\

  1503. {\

  1504.     (d)[0] = b;\

  1505.     (d)[1] = g;\

  1506.     (d)[2] = r;\

  1507. }

  1508. 

  1509. #define BPP 3

  1510. 

  1511. #include "imgconvert_template.h"

  1512. 

  1513. #undef RGB_IN

  1514. #undef RGB_OUT

  1515. #undef BPP

  1516. 

  1517. /* rgb24 handling */

  1518. 

  1519. #define RGB_NAME rgb24

  1520. #define FMT_RGB24

  1521. 

  1522. #define RGB_IN(r, g, b, s)\

  1523. {\

  1524.     r = (s)[0];\

  1525.     g = (s)[1];\

  1526.     b = (s)[2];\

  1527. }

  1528. 

  1529. #define RGB_OUT(d, r, g, b)\

  1530. {\

  1531.     (d)[0] = r;\

  1532.     (d)[1] = g;\

  1533.     (d)[2] = b;\

  1534. }

  1535. 

  1536. #define BPP 3

  1537. 

  1538. #include "imgconvert_template.h"

  1539. 

  1540. /* rgba32 handling */

  1541. 

  1542. #define RGB_NAME rgba32

  1543. #define FMT_RGBA32

  1544. 

  1545. #define RGB_IN(r, g, b, s)\

  1546. {\

  1547.     unsigned int v = ((const uint32_t *)(s))[0];\

  1548.     r = (v >> 16) & 0xff;\

  1549.     g = (v >> 8) & 0xff;\

  1550.     b = v & 0xff;\

  1551. }

  1552. 

  1553. #define RGBA_IN(r, g, b, a, s)\

  1554. {\

  1555.     unsigned int v = ((const uint32_t *)(s))[0];\

  1556.     a = (v >> 24) & 0xff;\

  1557.     r = (v >> 16) & 0xff;\

  1558.     g = (v >> 8) & 0xff;\

  1559.     b = v & 0xff;\

  1560. }

  1561. 

  1562. #define RGBA_OUT(d, r, g, b, a)\

  1563. {\

  1564.     ((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;\

  1565. }

  1566. 

  1567. #define BPP 4

  1568. 

  1569. #include "imgconvert_template.h"

  1570. 

  1571. static void mono_to_gray(AVPicture *dst, const AVPicture *src,

  1572.                          int width, int height, int xor_mask)

  1573. {

  1574.     const unsigned char *p;

  1575.     unsigned char *q;

  1576.     int v, dst_wrap, src_wrap;

  1577.     int y, w;

  1578. 

  1579.     p = src->data[0];

  1580.     src_wrap = src->linesize[0] - ((width + 7) >> 3);

  1581. 

  1582.     q = dst->data[0];

  1583.     dst_wrap = dst->linesize[0] - width;

  1584.     for(y=0;y<height;y++) {

  1585.         w = width; 

  1586.         while (w >= 8) {

  1587.             v = *p++ ^ xor_mask;

  1588.             q[0] = -(v >> 7);

  1589.             q[1] = -((v >> 6) & 1);

  1590.             q[2] = -((v >> 5) & 1);

  1591.             q[3] = -((v >> 4) & 1);

  1592.             q[4] = -((v >> 3) & 1);

  1593.             q[5] = -((v >> 2) & 1);

  1594.             q[6] = -((v >> 1) & 1);

  1595.             q[7] = -((v >> 0) & 1);

  1596.             w -= 8;

  1597.             q += 8;

  1598.         }

  1599.         if (w > 0) {

  1600.             v = *p++ ^ xor_mask;

  1601.             do {

  1602.                 q[0] = -((v >> 7) & 1);

  1603.                 q++;

  1604.                 v <<= 1;

  1605.             } while (--w);

  1606.         }

  1607.         p += src_wrap;

  1608.         q += dst_wrap;

  1609.     }

  1610. }

  1611. 

  1612. static void monowhite_to_gray(AVPicture *dst, const AVPicture *src,

  1613.                                int width, int height)

  1614. {

  1615.     mono_to_gray(dst, src, width, height, 0xff);

  1616. }

  1617. 

  1618. static void monoblack_to_gray(AVPicture *dst, const AVPicture *src,

  1619.                                int width, int height)

  1620. {

  1621.     mono_to_gray(dst, src, width, height, 0x00);

  1622. }

  1623. 

  1624. static void gray_to_mono(AVPicture *dst, const AVPicture *src,

  1625.                          int width, int height, int xor_mask)

  1626. {

  1627.     int n;

  1628.     const uint8_t *s;

  1629.     uint8_t *d;

  1630.     int j, b, v, n1, src_wrap, dst_wrap, y;

  1631. 

  1632.     s = src->data[0];

  1633.     src_wrap = src->linesize[0] - width;

  1634. 

  1635.     d = dst->data[0];

  1636.     dst_wrap = dst->linesize[0] - ((width + 7) >> 3);

  1637. 

  1638.     for(y=0;y<height;y++) {

  1639.         n = width;

  1640.         while (n >= 8) {

  1641.             v = 0;

  1642.             for(j=0;j<8;j++) {

  1643.                 b = s[0];

  1644.                 s++;

  1645.                 v = (v << 1) | (b >> 7);

  1646.             }

  1647.             d[0] = v ^ xor_mask;

  1648.             d++;

  1649.             n -= 8;

  1650.         }

  1651.         if (n > 0) {

  1652.             n1 = n;

  1653.             v = 0;

  1654.             while (n > 0) {

  1655.                 b = s[0];

  1656.                 s++;

  1657.                 v = (v << 1) | (b >> 7);

  1658.                 n--;

  1659.             }

  1660.             d[0] = (v << (8 - (n1 & 7))) ^ xor_mask;

  1661.             d++;

  1662.         }

  1663.         s += src_wrap;

  1664.         d += dst_wrap;

  1665.     }

  1666. }

  1667. 

  1668. static void gray_to_monowhite(AVPicture *dst, const AVPicture *src,

  1669.                               int width, int height)

  1670. {

  1671.     gray_to_mono(dst, src, width, height, 0xff);

  1672. }

  1673. 

  1674. static void gray_to_monoblack(AVPicture *dst, const AVPicture *src,

  1675.                               int width, int height)

  1676. {

  1677.     gray_to_mono(dst, src, width, height, 0x00);

  1678. }

  1679. 

  1680. typedef struct ConvertEntry {

  1681.     void (*convert)(AVPicture *dst,

  1682. 		    const AVPicture *src, int width, int height);

  1683. } ConvertEntry;

  1684. 

  1685. /* Add each new convertion function in this table. In order to be able

  1686.    to convert from any format to any format, the following constraints

  1687.    must be satisfied:

  1688. 

  1689.    - all FF_COLOR_RGB formats must convert to and from PIX_FMT_RGB24 

  1690. 

  1691.    - all FF_COLOR_GRAY formats must convert to and from PIX_FMT_GRAY8

  1692. 

  1693.    - all FF_COLOR_RGB formats with alpha must convert to and from PIX_FMT_RGBA32

  1694. 

  1695.    - PIX_FMT_YUV444P and PIX_FMT_YUVJ444P must convert to and from

  1696.      PIX_FMT_RGB24.

  1697. 

  1698.    - PIX_FMT_422 must convert to and from PIX_FMT_422P.

  1699. 

  1700.    The other conversion functions are just optimisations for common cases.

  1701. */

  1702. static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {

  1703.     [PIX_FMT_YUV420P] = {

  1704.         [PIX_FMT_YUV422] = {

  1705.             .convert = yuv420p_to_yuv422,

  1706.         },

  1707.         [PIX_FMT_RGB555] = { 

  1708.             .convert = yuv420p_to_rgb555

  1709.         },

  1710.         [PIX_FMT_RGB565] = { 

  1711.             .convert = yuv420p_to_rgb565

  1712.         },

  1713.         [PIX_FMT_BGR24] = { 

  1714.             .convert = yuv420p_to_bgr24

  1715.         },

  1716.         [PIX_FMT_RGB24] = { 

  1717.             .convert = yuv420p_to_rgb24

  1718.         },

  1719.         [PIX_FMT_RGBA32] = { 

  1720.             .convert = yuv420p_to_rgba32

  1721.         },

  1722. 	[PIX_FMT_UYVY422] = { 

  1723.             .convert = yuv420p_to_uyvy422,

  1724.         },

  1725.     },

  1726.     [PIX_FMT_YUV422P] = { 

  1727.         [PIX_FMT_YUV422] = { 

  1728.             .convert = yuv422p_to_yuv422,

  1729.         },

  1730.         [PIX_FMT_UYVY422] = { 

  1731.             .convert = yuv422p_to_uyvy422,

  1732.         },

  1733.     },

  1734.     [PIX_FMT_YUV444P] = { 

  1735.         [PIX_FMT_RGB24] = { 

  1736.             .convert = yuv444p_to_rgb24

  1737.         },

  1738.     },

  1739.     [PIX_FMT_YUVJ420P] = {

  1740.         [PIX_FMT_RGB555] = { 

  1741.             .convert = yuvj420p_to_rgb555

  1742.         },

  1743.         [PIX_FMT_RGB565] = { 

  1744.             .convert = yuvj420p_to_rgb565

  1745.         },

  1746.         [PIX_FMT_BGR24] = { 

  1747.             .convert = yuvj420p_to_bgr24

  1748.         },

  1749.         [PIX_FMT_RGB24] = { 

  1750.             .convert = yuvj420p_to_rgb24

  1751.         },

  1752.         [PIX_FMT_RGBA32] = { 

  1753.             .convert = yuvj420p_to_rgba32

  1754.         },

  1755.     },

  1756.     [PIX_FMT_YUVJ444P] = { 

  1757.         [PIX_FMT_RGB24] = { 

  1758.             .convert = yuvj444p_to_rgb24

  1759.         },

  1760.     },

  1761.     [PIX_FMT_YUV422] = { 

  1762.         [PIX_FMT_YUV420P] = { 

  1763.             .convert = yuv422_to_yuv420p,

  1764.         },

  1765.         [PIX_FMT_YUV422P] = { 

  1766.             .convert = yuv422_to_yuv422p,

  1767.         },

  1768.     },

  1769.     [PIX_FMT_UYVY422] = { 

  1770.         [PIX_FMT_YUV420P] = { 

  1771.             .convert = uyvy422_to_yuv420p,

  1772.         },

  1773.         [PIX_FMT_YUV422P] = { 

  1774.             .convert = uyvy422_to_yuv422p,

  1775.         },

  1776.     },

  1777.     [PIX_FMT_RGB24] = {

  1778.         [PIX_FMT_YUV420P] = { 

  1779.             .convert = rgb24_to_yuv420p

  1780.         },

  1781.         [PIX_FMT_RGB565] = { 

  1782.             .convert = rgb24_to_rgb565

  1783.         },

  1784.         [PIX_FMT_RGB555] = { 

  1785.             .convert = rgb24_to_rgb555

  1786.         },

  1787.         [PIX_FMT_RGBA32] = { 

  1788.             .convert = rgb24_to_rgba32

  1789.         },

  1790.         [PIX_FMT_BGR24] = { 

  1791.             .convert = rgb24_to_bgr24

  1792.         },

  1793.         [PIX_FMT_GRAY8] = { 

  1794.             .convert = rgb24_to_gray

  1795.         },

  1796.         [PIX_FMT_PAL8] = {

  1797.             .convert = rgb24_to_pal8

  1798.         },

  1799.         [PIX_FMT_YUV444P] = { 

  1800.             .convert = rgb24_to_yuv444p

  1801.         },

  1802.         [PIX_FMT_YUVJ420P] = { 

  1803.             .convert = rgb24_to_yuvj420p

  1804.         },

  1805.         [PIX_FMT_YUVJ444P] = { 

  1806.             .convert = rgb24_to_yuvj444p

  1807.         },

  1808.     },

  1809.     [PIX_FMT_RGBA32] = {

  1810.         [PIX_FMT_RGB24] = { 

  1811.             .convert = rgba32_to_rgb24

  1812.         },

  1813.         [PIX_FMT_RGB555] = { 

  1814.             .convert = rgba32_to_rgb555

  1815.         },

  1816.         [PIX_FMT_PAL8] = { 

  1817.             .convert = rgba32_to_pal8

  1818.         },

  1819.         [PIX_FMT_YUV420P] = { 

  1820.             .convert = rgba32_to_yuv420p

  1821.         },

  1822.         [PIX_FMT_GRAY8] = { 

  1823.             .convert = rgba32_to_gray

  1824.         },

  1825.     },

  1826.     [PIX_FMT_BGR24] = {

  1827.         [PIX_FMT_RGB24] = { 

  1828.             .convert = bgr24_to_rgb24

  1829.         },

  1830.         [PIX_FMT_YUV420P] = { 

  1831.             .convert = bgr24_to_yuv420p

  1832.         },

  1833.         [PIX_FMT_GRAY8] = { 

  1834.             .convert = bgr24_to_gray

  1835.         },

  1836.     },

  1837.     [PIX_FMT_RGB555] = {

  1838.         [PIX_FMT_RGB24] = { 

  1839.             .convert = rgb555_to_rgb24

  1840.         },

  1841.         [PIX_FMT_RGBA32] = { 

  1842.             .convert = rgb555_to_rgba32

  1843.         },

  1844.         [PIX_FMT_YUV420P] = { 

  1845.             .convert = rgb555_to_yuv420p

  1846.         },

  1847.         [PIX_FMT_GRAY8] = { 

  1848.             .convert = rgb555_to_gray

  1849.         },

  1850.     },

  1851.     [PIX_FMT_RGB565] = {

  1852.         [PIX_FMT_RGB24] = { 

  1853.             .convert = rgb565_to_rgb24

  1854.         },

  1855.         [PIX_FMT_YUV420P] = { 

  1856.             .convert = rgb565_to_yuv420p

  1857.         },

  1858.         [PIX_FMT_GRAY8] = { 

  1859.             .convert = rgb565_to_gray

  1860.         },

  1861.     },

  1862.     [PIX_FMT_GRAY8] = {

  1863.         [PIX_FMT_RGB555] = { 

  1864.             .convert = gray_to_rgb555

  1865.         },

  1866.         [PIX_FMT_RGB565] = { 

  1867.             .convert = gray_to_rgb565

  1868.         },

  1869.         [PIX_FMT_RGB24] = { 

  1870.             .convert = gray_to_rgb24

  1871.         },

  1872.         [PIX_FMT_BGR24] = { 

  1873.             .convert = gray_to_bgr24

  1874.         },

  1875.         [PIX_FMT_RGBA32] = { 

  1876.             .convert = gray_to_rgba32

  1877.         },

  1878.         [PIX_FMT_MONOWHITE] = { 

  1879.             .convert = gray_to_monowhite

  1880.         },

  1881.         [PIX_FMT_MONOBLACK] = { 

  1882.             .convert = gray_to_monoblack

  1883.         },

  1884.     },

  1885.     [PIX_FMT_MONOWHITE] = {

  1886.         [PIX_FMT_GRAY8] = { 

  1887.             .convert = monowhite_to_gray

  1888.         },

  1889.     },

  1890.     [PIX_FMT_MONOBLACK] = {

  1891.         [PIX_FMT_GRAY8] = { 

  1892.             .convert = monoblack_to_gray

  1893.         },

  1894.     },

  1895.     [PIX_FMT_PAL8] = {

  1896.         [PIX_FMT_RGB555] = { 

  1897.             .convert = pal8_to_rgb555

  1898.         },

  1899.         [PIX_FMT_RGB565] = { 

  1900.             .convert = pal8_to_rgb565

  1901.         },

  1902.         [PIX_FMT_BGR24] = { 

  1903.             .convert = pal8_to_bgr24

  1904.         },

  1905.         [PIX_FMT_RGB24] = { 

  1906.             .convert = pal8_to_rgb24

  1907.         },

  1908.         [PIX_FMT_RGBA32] = { 

  1909.             .convert = pal8_to_rgba32

  1910.         },

  1911.     },

  1912.     [PIX_FMT_UYVY411] = { 

  1913.         [PIX_FMT_YUV411P] = { 

  1914.             .convert = uyvy411_to_yuv411p,

  1915.         },

  1916.     },

  1917. 

  1918. };

  1919. 

  1920. int avpicture_alloc(AVPicture *picture,

  1921.                            int pix_fmt, int width, int height)

  1922. {

  1923.     unsigned int size;

  1924.     void *ptr;

  1925. 

  1926.     size = avpicture_get_size(pix_fmt, width, height);

  1927.     if(size<0)

  1928.         goto fail;

  1929.     ptr = av_malloc(size);

  1930.     if (!ptr)

  1931.         goto fail;

  1932.     avpicture_fill(picture, ptr, pix_fmt, width, height);

  1933.     return 0;

  1934.  fail:

  1935.     memset(picture, 0, sizeof(AVPicture));

  1936.     return -1;

  1937. }

  1938. 

  1939. void avpicture_free(AVPicture *picture)

  1940. {

  1941.     av_free(picture->data[0]);

  1942. }

  1943. 

  1944. /* return true if yuv planar */

  1945. static inline int is_yuv_planar(PixFmtInfo *ps)

  1946. {

  1947.     return (ps->color_type == FF_COLOR_YUV ||

  1948.             ps->color_type == FF_COLOR_YUV_JPEG) && 

  1949.         ps->pixel_type == FF_PIXEL_PLANAR;

  1950. }

  1951. 

  1952. /* XXX: always use linesize. Return -1 if not supported */

  1953. int img_convert(AVPicture *dst, int dst_pix_fmt,

  1954.                 const AVPicture *src, int src_pix_fmt, 

  1955.                 int src_width, int src_height)

  1956. {

  1957.     static int inited;

  1958.     int i, ret, dst_width, dst_height, int_pix_fmt;

  1959.     PixFmtInfo *src_pix, *dst_pix;

  1960.     ConvertEntry *ce;

  1961.     AVPicture tmp1, *tmp = &tmp1;

  1962. 

  1963.     if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB ||

  1964.         dst_pix_fmt < 0 || dst_pix_fmt >= PIX_FMT_NB)

  1965.         return -1;

  1966.     if (src_width <= 0 || src_height <= 0)

  1967.         return 0;

  1968. 

  1969.     if (!inited) {

  1970.         inited = 1;

  1971.         img_convert_init();

  1972.     }

  1973. 

  1974.     dst_width = src_width;

  1975.     dst_height = src_height;

  1976. 

  1977.     dst_pix = &pix_fmt_info[dst_pix_fmt];

  1978.     src_pix = &pix_fmt_info[src_pix_fmt];

  1979.     if (src_pix_fmt == dst_pix_fmt) {

  1980.         /* no conversion needed: just copy */

  1981.         img_copy(dst, src, dst_pix_fmt, dst_width, dst_height);

  1982.         return 0;

  1983.     }

  1984. 

  1985.     ce = &convert_table[src_pix_fmt][dst_pix_fmt];

  1986.     if (ce->convert) {

  1987.         /* specific conversion routine */

  1988.         ce->convert(dst, src, dst_width, dst_height);

  1989.         return 0;

  1990.     }

  1991. 

  1992.     /* gray to YUV */

  1993.     if (is_yuv_planar(dst_pix) &&

  1994.         src_pix_fmt == PIX_FMT_GRAY8) {

  1995.         int w, h, y;

  1996.         uint8_t *d;

  1997. 

  1998.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG) {

  1999.             img_copy_plane(dst->data[0], dst->linesize[0],

  2000.                      src->data[0], src->linesize[0],

  2001.                      dst_width, dst_height);

  2002.         } else {

  2003.             img_apply_table(dst->data[0], dst->linesize[0],

  2004.                             src->data[0], src->linesize[0],

  2005.                             dst_width, dst_height,

  2006.                             y_jpeg_to_ccir);

  2007.         }

  2008.         /* fill U and V with 128 */

  2009.         w = dst_width;

  2010.         h = dst_height;

  2011.         w >>= dst_pix->x_chroma_shift;

  2012.         h >>= dst_pix->y_chroma_shift;

  2013.         for(i = 1; i <= 2; i++) {

  2014.             d = dst->data[i];

  2015.             for(y = 0; y< h; y++) {

  2016.                 memset(d, 128, w);

  2017.                 d += dst->linesize[i];

  2018.             }

  2019.         }

  2020.         return 0;

  2021.     }

  2022. 

  2023.     /* YUV to gray */

  2024.     if (is_yuv_planar(src_pix) && 

  2025.         dst_pix_fmt == PIX_FMT_GRAY8) {

  2026.         if (src_pix->color_type == FF_COLOR_YUV_JPEG) {

  2027.             img_copy_plane(dst->data[0], dst->linesize[0],

  2028.                      src->data[0], src->linesize[0],

  2029.                      dst_width, dst_height);

  2030.         } else {

  2031.             img_apply_table(dst->data[0], dst->linesize[0],

  2032.                             src->data[0], src->linesize[0],

  2033.                             dst_width, dst_height,

  2034.                             y_ccir_to_jpeg);

  2035.         }

  2036.         return 0;

  2037.     }

  2038. 

  2039.     /* YUV to YUV planar */

  2040.     if (is_yuv_planar(dst_pix) && is_yuv_planar(src_pix)) {

  2041.         int x_shift, y_shift, w, h, xy_shift;

  2042.         void (*resize_func)(uint8_t *dst, int dst_wrap, 

  2043.                             const uint8_t *src, int src_wrap,

  2044.                             int width, int height);

  2045. 

  2046.         /* compute chroma size of the smallest dimensions */

  2047.         w = dst_width;

  2048.         h = dst_height;

  2049.         if (dst_pix->x_chroma_shift >= src_pix->x_chroma_shift)

  2050.             w >>= dst_pix->x_chroma_shift;

  2051.         else

  2052.             w >>= src_pix->x_chroma_shift;

  2053.         if (dst_pix->y_chroma_shift >= src_pix->y_chroma_shift)

  2054.             h >>= dst_pix->y_chroma_shift;

  2055.         else

  2056.             h >>= src_pix->y_chroma_shift;

  2057. 

  2058.         x_shift = (dst_pix->x_chroma_shift - src_pix->x_chroma_shift);

  2059.         y_shift = (dst_pix->y_chroma_shift - src_pix->y_chroma_shift);

  2060.         xy_shift = ((x_shift & 0xf) << 4) | (y_shift & 0xf);

  2061.         /* there must be filters for conversion at least from and to

  2062.            YUV444 format */

  2063.         switch(xy_shift) {

  2064.         case 0x00:

  2065.             resize_func = img_copy_plane;

  2066.             break;

  2067.         case 0x10:

  2068.             resize_func = shrink21;

  2069.             break;

  2070.         case 0x20:

  2071.             resize_func = shrink41;

  2072.             break;

  2073.         case 0x01:

  2074.             resize_func = shrink12;

  2075.             break;

  2076.         case 0x11:

  2077.             resize_func = shrink22;

  2078.             break;

  2079.         case 0x22:

  2080.             resize_func = shrink44;

  2081.             break;

  2082.         case 0xf0:

  2083.             resize_func = grow21;

  2084.             break;

  2085.         case 0xe0:

  2086.             resize_func = grow41;

  2087.             break;

  2088.         case 0xff:

  2089.             resize_func = grow22;

  2090.             break;

  2091.         case 0xee:

  2092.             resize_func = grow44;

  2093.             break;

  2094.         case 0xf1:

  2095.             resize_func = conv411;

  2096.             break;

  2097.         default:

  2098.             /* currently not handled */

  2099.             goto no_chroma_filter;

  2100.         }

  2101. 

  2102.         img_copy_plane(dst->data[0], dst->linesize[0],

  2103.                        src->data[0], src->linesize[0],

  2104.                        dst_width, dst_height);

  2105. 

  2106.         for(i = 1;i <= 2; i++)

  2107.             resize_func(dst->data[i], dst->linesize[i],

  2108.                         src->data[i], src->linesize[i],

  2109.                         dst_width>>dst_pix->x_chroma_shift, dst_height>>dst_pix->y_chroma_shift);

  2110.         /* if yuv color space conversion is needed, we do it here on

  2111.            the destination image */

  2112.         if (dst_pix->color_type != src_pix->color_type) {

  2113.             const uint8_t *y_table, *c_table;

  2114.             if (dst_pix->color_type == FF_COLOR_YUV) {

  2115.                 y_table = y_jpeg_to_ccir;

  2116.                 c_table = c_jpeg_to_ccir;

  2117.             } else {

  2118.                 y_table = y_ccir_to_jpeg;

  2119.                 c_table = c_ccir_to_jpeg;

  2120.             }

  2121.             img_apply_table(dst->data[0], dst->linesize[0],

  2122.                             dst->data[0], dst->linesize[0],

  2123.                             dst_width, dst_height,

  2124.                             y_table);

  2125. 

  2126.             for(i = 1;i <= 2; i++)

  2127.                 img_apply_table(dst->data[i], dst->linesize[i],

  2128.                                 dst->data[i], dst->linesize[i],

  2129.                                 dst_width>>dst_pix->x_chroma_shift, 

  2130.                                 dst_height>>dst_pix->y_chroma_shift,

  2131.                                 c_table);

  2132.         }

  2133.         return 0;

  2134.     }

  2135.  no_chroma_filter:

  2136. 

  2137.     /* try to use an intermediate format */

  2138.     if (src_pix_fmt == PIX_FMT_YUV422 ||

  2139.         dst_pix_fmt == PIX_FMT_YUV422) {

  2140.         /* specific case: convert to YUV422P first */

  2141.         int_pix_fmt = PIX_FMT_YUV422P;

  2142.     } else if (src_pix_fmt == PIX_FMT_UYVY422 ||

  2143.         dst_pix_fmt == PIX_FMT_UYVY422) {

  2144.         /* specific case: convert to YUV422P first */

  2145.         int_pix_fmt = PIX_FMT_YUV422P;

  2146.     } else if (src_pix_fmt == PIX_FMT_UYVY411 ||

  2147.         dst_pix_fmt == PIX_FMT_UYVY411) {

  2148.         /* specific case: convert to YUV411P first */

  2149.         int_pix_fmt = PIX_FMT_YUV411P;

  2150.     } else if ((src_pix->color_type == FF_COLOR_GRAY &&

  2151.                 src_pix_fmt != PIX_FMT_GRAY8) || 

  2152.                (dst_pix->color_type == FF_COLOR_GRAY &&

  2153.                 dst_pix_fmt != PIX_FMT_GRAY8)) {

  2154.         /* gray8 is the normalized format */

  2155.         int_pix_fmt = PIX_FMT_GRAY8;

  2156.     } else if ((is_yuv_planar(src_pix) && 

  2157.                 src_pix_fmt != PIX_FMT_YUV444P &&

  2158.                 src_pix_fmt != PIX_FMT_YUVJ444P)) {

  2159.         /* yuv444 is the normalized format */

  2160.         if (src_pix->color_type == FF_COLOR_YUV_JPEG)

  2161.             int_pix_fmt = PIX_FMT_YUVJ444P;

  2162.         else

  2163.             int_pix_fmt = PIX_FMT_YUV444P;

  2164.     } else if ((is_yuv_planar(dst_pix) && 

  2165.                 dst_pix_fmt != PIX_FMT_YUV444P &&

  2166.                 dst_pix_fmt != PIX_FMT_YUVJ444P)) {

  2167.         /* yuv444 is the normalized format */

  2168.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG)

  2169.             int_pix_fmt = PIX_FMT_YUVJ444P;

  2170.         else

  2171.             int_pix_fmt = PIX_FMT_YUV444P;

  2172.     } else {

  2173.         /* the two formats are rgb or gray8 or yuv[j]444p */

  2174.         if (src_pix->is_alpha && dst_pix->is_alpha)

  2175.             int_pix_fmt = PIX_FMT_RGBA32;

  2176.         else

  2177.             int_pix_fmt = PIX_FMT_RGB24;

  2178.     }

  2179.     if (avpicture_alloc(tmp, int_pix_fmt, dst_width, dst_height) < 0)

  2180.         return -1;

  2181.     ret = -1;

  2182.     if (img_convert(tmp, int_pix_fmt,

  2183.                     src, src_pix_fmt, src_width, src_height) < 0)

  2184.         goto fail1;

  2185.     if (img_convert(dst, dst_pix_fmt,

  2186.                     tmp, int_pix_fmt, dst_width, dst_height) < 0)

  2187.         goto fail1;

  2188.     ret = 0;

  2189.  fail1:

  2190.     avpicture_free(tmp);

  2191.     return ret;

  2192. }

  2193. 

  2194. /* NOTE: we scan all the pixels to have an exact information */

  2195. static int get_alpha_info_pal8(const AVPicture *src, int width, int height)

  2196. {

  2197.     const unsigned char *p;

  2198.     int src_wrap, ret, x, y;

  2199.     unsigned int a;

  2200.     uint32_t *palette = (uint32_t *)src->data[1];

  2201.     

  2202.     p = src->data[0];

  2203.     src_wrap = src->linesize[0] - width;

  2204.     ret = 0;

  2205.     for(y=0;y<height;y++) {

  2206.         for(x=0;x<width;x++) {

  2207.             a = palette[p[0]] >> 24;

  2208.             if (a == 0x00) {

  2209.                 ret |= FF_ALPHA_TRANSP;

  2210.             } else if (a != 0xff) {

  2211.                 ret |= FF_ALPHA_SEMI_TRANSP;

  2212.             }

  2213.             p++;

  2214.         }

  2215.         p += src_wrap;

  2216.     }

  2217.     return ret;

  2218. }

  2219. 

  2220. /**

  2221.  * Tell if an image really has transparent alpha values.

  2222.  * @return ored mask of FF_ALPHA_xxx constants

  2223.  */

  2224. int img_get_alpha_info(const AVPicture *src,

  2225. 		       int pix_fmt, int width, int height)

  2226. {

  2227.     PixFmtInfo *pf = &pix_fmt_info[pix_fmt];

  2228.     int ret;

  2229. 

  2230.     pf = &pix_fmt_info[pix_fmt];

  2231.     /* no alpha can be represented in format */

  2232.     if (!pf->is_alpha)

  2233.         return 0;

  2234.     switch(pix_fmt) {

  2235.     case PIX_FMT_RGBA32:

  2236.         ret = get_alpha_info_rgba32(src, width, height);

  2237.         break;

  2238.     case PIX_FMT_RGB555:

  2239.         ret = get_alpha_info_rgb555(src, width, height);

  2240.         break;

  2241.     case PIX_FMT_PAL8:

  2242.         ret = get_alpha_info_pal8(src, width, height);

  2243.         break;

  2244.     default:

  2245.         /* we do not know, so everything is indicated */

  2246.         ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;

  2247.         break;

  2248.     }

  2249.     return ret;

  2250. }

  2251. 

  2252. #ifdef HAVE_MMX

  2253. #define DEINT_INPLACE_LINE_LUM \

  2254.                     movd_m2r(lum_m4[0],mm0);\

  2255.                     movd_m2r(lum_m3[0],mm1);\

  2256.                     movd_m2r(lum_m2[0],mm2);\

  2257.                     movd_m2r(lum_m1[0],mm3);\

  2258.                     movd_m2r(lum[0],mm4);\

  2259.                     punpcklbw_r2r(mm7,mm0);\

  2260.                     movd_r2m(mm2,lum_m4[0]);\

  2261.                     punpcklbw_r2r(mm7,mm1);\

  2262.                     punpcklbw_r2r(mm7,mm2);\

  2263.                     punpcklbw_r2r(mm7,mm3);\

  2264.                     punpcklbw_r2r(mm7,mm4);\

  2265.                     paddw_r2r(mm3,mm1);\

  2266.                     psllw_i2r(1,mm2);\

  2267.                     paddw_r2r(mm4,mm0);\

  2268.                     psllw_i2r(2,mm1);\

  2269.                     paddw_r2r(mm6,mm2);\

  2270.                     paddw_r2r(mm2,mm1);\

  2271.                     psubusw_r2r(mm0,mm1);\

  2272.                     psrlw_i2r(3,mm1);\

  2273.                     packuswb_r2r(mm7,mm1);\

  2274.                     movd_r2m(mm1,lum_m2[0]);

  2275. 

  2276. #define DEINT_LINE_LUM \

  2277.                     movd_m2r(lum_m4[0],mm0);\

  2278.                     movd_m2r(lum_m3[0],mm1);\

  2279.                     movd_m2r(lum_m2[0],mm2);\

  2280.                     movd_m2r(lum_m1[0],mm3);\

  2281.                     movd_m2r(lum[0],mm4);\

  2282.                     punpcklbw_r2r(mm7,mm0);\

  2283.                     punpcklbw_r2r(mm7,mm1);\

  2284.                     punpcklbw_r2r(mm7,mm2);\

  2285.                     punpcklbw_r2r(mm7,mm3);\

  2286.                     punpcklbw_r2r(mm7,mm4);\

  2287.                     paddw_r2r(mm3,mm1);\

  2288.                     psllw_i2r(1,mm2);\

  2289.                     paddw_r2r(mm4,mm0);\

  2290.                     psllw_i2r(2,mm1);\

  2291.                     paddw_r2r(mm6,mm2);\

  2292.                     paddw_r2r(mm2,mm1);\

  2293.                     psubusw_r2r(mm0,mm1);\

  2294.                     psrlw_i2r(3,mm1);\

  2295.                     packuswb_r2r(mm7,mm1);\

  2296.                     movd_r2m(mm1,dst[0]);

  2297. #endif

  2298. 

  2299. /* filter parameters: [-1 4 2 4 -1] // 8 */

  2300. static void deinterlace_line(uint8_t *dst, 

  2301. 			     const uint8_t *lum_m4, const uint8_t *lum_m3, 

  2302. 			     const uint8_t *lum_m2, const uint8_t *lum_m1, 

  2303. 			     const uint8_t *lum,

  2304. 			     int size)

  2305. {

  2306. #ifndef HAVE_MMX

  2307.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2308.     int sum;

  2309. 

  2310.     for(;size > 0;size--) {

  2311.         sum = -lum_m4[0];

  2312.         sum += lum_m3[0] << 2;

  2313.         sum += lum_m2[0] << 1;

  2314.         sum += lum_m1[0] << 2;

  2315.         sum += -lum[0];

  2316.         dst[0] = cm[(sum + 4) >> 3];

  2317.         lum_m4++;

  2318.         lum_m3++;

  2319.         lum_m2++;

  2320.         lum_m1++;

  2321.         lum++;

  2322.         dst++;

  2323.     }

  2324. #else

  2325. 

  2326.     {

  2327.         mmx_t rounder;

  2328.         rounder.uw[0]=4;

  2329.         rounder.uw[1]=4;

  2330.         rounder.uw[2]=4;

  2331.         rounder.uw[3]=4;

  2332.         pxor_r2r(mm7,mm7);

  2333.         movq_m2r(rounder,mm6);

  2334.     }

  2335.     for (;size > 3; size-=4) {

  2336.         DEINT_LINE_LUM

  2337.         lum_m4+=4;

  2338.         lum_m3+=4;

  2339.         lum_m2+=4;

  2340.         lum_m1+=4;

  2341.         lum+=4;

  2342.         dst+=4;

  2343.     }

  2344. #endif

  2345. }

  2346. static void deinterlace_line_inplace(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,

  2347.                              int size)

  2348. {

  2349. #ifndef HAVE_MMX

  2350.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2351.     int sum;

  2352. 

  2353.     for(;size > 0;size--) {

  2354.         sum = -lum_m4[0];

  2355.         sum += lum_m3[0] << 2;

  2356.         sum += lum_m2[0] << 1;

  2357.         lum_m4[0]=lum_m2[0];

  2358.         sum += lum_m1[0] << 2;

  2359.         sum += -lum[0];

  2360.         lum_m2[0] = cm[(sum + 4) >> 3];

  2361.         lum_m4++;

  2362.         lum_m3++;

  2363.         lum_m2++;

  2364.         lum_m1++;

  2365.         lum++;

  2366.     }

  2367. #else

  2368. 

  2369.     {

  2370.         mmx_t rounder;

  2371.         rounder.uw[0]=4;

  2372.         rounder.uw[1]=4;

  2373.         rounder.uw[2]=4;

  2374.         rounder.uw[3]=4;

  2375.         pxor_r2r(mm7,mm7);

  2376.         movq_m2r(rounder,mm6);

  2377.     }

  2378.     for (;size > 3; size-=4) {

  2379.         DEINT_INPLACE_LINE_LUM

  2380.         lum_m4+=4;

  2381.         lum_m3+=4;

  2382.         lum_m2+=4;

  2383.         lum_m1+=4;

  2384.         lum+=4;

  2385.     }

  2386. #endif

  2387. }

  2388. 

  2389. /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The

  2390.    top field is copied as is, but the bottom field is deinterlaced

  2391.    against the top field. */

  2392. static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,

  2393.                                     const uint8_t *src1, int src_wrap,

  2394.                                     int width, int height)

  2395. {

  2396.     const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;

  2397.     int y;

  2398. 

  2399.     src_m2 = src1;

  2400.     src_m1 = src1;

  2401.     src_0=&src_m1[src_wrap];

  2402.     src_p1=&src_0[src_wrap];

  2403.     src_p2=&src_p1[src_wrap];

  2404.     for(y=0;y<(height-2);y+=2) {

  2405.         memcpy(dst,src_m1,width);

  2406.         dst += dst_wrap;

  2407.         deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);

  2408.         src_m2 = src_0;

  2409.         src_m1 = src_p1;

  2410.         src_0 = src_p2;

  2411.         src_p1 += 2*src_wrap;

  2412.         src_p2 += 2*src_wrap;

  2413.         dst += dst_wrap;

  2414.     }

  2415.     memcpy(dst,src_m1,width);

  2416.     dst += dst_wrap;

  2417.     /* do last line */

  2418.     deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);

  2419. }

  2420. 

  2421. static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,

  2422. 					     int width, int height)

  2423. {

  2424.     uint8_t *src_m1, *src_0, *src_p1, *src_p2;

  2425.     int y;

  2426.     uint8_t *buf;

  2427.     buf = (uint8_t*)av_malloc(width);

  2428. 

  2429.     src_m1 = src1;

  2430.     memcpy(buf,src_m1,width);

  2431.     src_0=&src_m1[src_wrap];

  2432.     src_p1=&src_0[src_wrap];

  2433.     src_p2=&src_p1[src_wrap];

  2434.     for(y=0;y<(height-2);y+=2) {

  2435.         deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);

  2436.         src_m1 = src_p1;

  2437.         src_0 = src_p2;

  2438.         src_p1 += 2*src_wrap;

  2439.         src_p2 += 2*src_wrap;

  2440.     }

  2441.     /* do last line */

  2442.     deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);

  2443.     av_free(buf);

  2444. }

  2445. 

  2446. 

  2447. /* deinterlace - if not supported return -1 */

  2448. int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,

  2449.                           int pix_fmt, int width, int height)

  2450. {

  2451.     int i;

  2452. 

  2453.     if (pix_fmt != PIX_FMT_YUV420P &&

  2454.         pix_fmt != PIX_FMT_YUV422P &&

  2455.         pix_fmt != PIX_FMT_YUV444P &&

  2456. 	pix_fmt != PIX_FMT_YUV411P)

  2457.         return -1;

  2458.     if ((width & 3) != 0 || (height & 3) != 0)

  2459.         return -1;

  2460. 

  2461.     for(i=0;i<3;i++) {

  2462.         if (i == 1) {

  2463.             switch(pix_fmt) {

  2464.             case PIX_FMT_YUV420P:

  2465.                 width >>= 1;

  2466.                 height >>= 1;

  2467.                 break;

  2468.             case PIX_FMT_YUV422P:

  2469.                 width >>= 1;

  2470.                 break;

  2471.             case PIX_FMT_YUV411P:

  2472.                 width >>= 2;

  2473.                 break;

  2474.             default:

  2475.                 break;

  2476.             }

  2477.         }

  2478.         if (src == dst) {

  2479.             deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],

  2480.                                  width, height);

  2481.         } else {

  2482.             deinterlace_bottom_field(dst->data[i],dst->linesize[i],

  2483.                                         src->data[i], src->linesize[i],

  2484.                                         width, height);

  2485.         }

  2486.     }

  2487. #ifdef HAVE_MMX

  2488.     emms();

  2489. #endif

  2490.     return 0;

  2491. }

  2492. 

  2493. #undef FIX