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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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.     if((!dst) || (!src))

  580.         return;

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

  582.         memcpy(dst, src, width);

  583.         dst += dst_wrap;

  584.         src += src_wrap;

  585.     }

  586. }

  587. 

  588. /**

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

  590.  */

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

  592.               int pix_fmt, int width, int height)

  593. {

  594.     int bwidth, bits, i;

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

  596. 

  597.     pf = &pix_fmt_info[pix_fmt];

  598.     switch(pf->pixel_type) {

  599.     case FF_PIXEL_PACKED:

  600.         switch(pix_fmt) {

  601.         case PIX_FMT_YUV422:

  602.         case PIX_FMT_UYVY422:

  603.         case PIX_FMT_RGB565:

  604.         case PIX_FMT_RGB555:

  605.             bits = 16;

  606.             break;

  607.         case PIX_FMT_UYVY411:

  608.             bits = 12;

  609.             break;

  610.         default:

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

  612.             break;

  613.         }

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

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

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

  617.                        bwidth, height);

  618.         break;

  619.     case FF_PIXEL_PLANAR:

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

  621.             int w, h;

  622.             w = width;

  623.             h = height;

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

  625.                 w >>= pf->x_chroma_shift;

  626.                 h >>= pf->y_chroma_shift;

  627.             }

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

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

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

  631.                            bwidth, h);

  632.         }

  633.         break;

  634.     case FF_PIXEL_PALETTE:

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

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

  637.                        width, height);

  638.         /* copy the palette */

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

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

  641.                        4, 256);

  642.         break;

  643.     }

  644. }

  645. 

  646. /* XXX: totally non optimized */

  647. 

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

  649.                               int width, int height)

  650. {

  651.     const uint8_t *p, *p1;

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

  653.     int w;

  654. 

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

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

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

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

  659. 

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

  661.         p = p1;

  662.         lum = lum1;

  663.         cb = cb1;

  664.         cr = cr1;

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

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

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

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

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

  670.             p += 4;

  671.             lum += 2;

  672.             cb++;

  673.             cr++;

  674.         }

  675.         if (w) {

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

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

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

  679.             cb++;

  680.             cr++;

  681.         }

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

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

  684.         if (height>1) {

  685.             p = p1;

  686.             lum = lum1;

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

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

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

  690.                 p += 4;

  691.                 lum += 2;

  692.             }

  693.             if (w) {

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

  695.             }

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

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

  698.         }

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

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

  701.     }

  702. }

  703. 

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

  705.                               int width, int height)

  706. {

  707.     const uint8_t *p, *p1;

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

  709.     int w;

  710. 

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

  712. 

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

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

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

  716. 

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

  718.         p = p1;

  719.         lum = lum1;

  720.         cb = cb1;

  721.         cr = cr1;

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

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

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

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

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

  727.             p += 4;

  728.             lum += 2;

  729.             cb++;

  730.             cr++;

  731.         }

  732.         if (w) {

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

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

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

  736.             cb++;

  737.             cr++;

  738.         }

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

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

  741.         if (height>1) {

  742.             p = p1;

  743.             lum = lum1;

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

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

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

  747.                 p += 4;

  748.                 lum += 2;

  749.             }

  750.             if (w) {

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

  752.             }

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

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

  755.         }

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

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

  758.     }

  759. }

  760. 

  761. 

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

  763.                               int width, int height)

  764. {

  765.     const uint8_t *p, *p1;

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

  767.     int w;

  768. 

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

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

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

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

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

  774.         p = p1;

  775.         lum = lum1;

  776.         cb = cb1;

  777.         cr = cr1;

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

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

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

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

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

  783.             p += 4;

  784.             lum += 2;

  785.             cb++;

  786.             cr++;

  787.         }

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

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

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

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

  792.     }

  793. }

  794. 

  795. 

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

  797.                               int width, int height)

  798. {

  799.     const uint8_t *p, *p1;

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

  801.     int w;

  802. 

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

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

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

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

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

  808.         p = p1;

  809.         lum = lum1;

  810.         cb = cb1;

  811.         cr = cr1;

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

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

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

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

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

  817.             p += 4;

  818.             lum += 2;

  819.             cb++;

  820.             cr++;

  821.         }

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

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

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

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

  826.     }

  827. }

  828. 

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

  830.                               int width, int height)

  831. {

  832.     uint8_t *p, *p1;

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

  834.     int w;

  835. 

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

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

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

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

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

  841.         p = p1;

  842.         lum = lum1;

  843.         cb = cb1;

  844.         cr = cr1;

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

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

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

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

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

  850.             p += 4;

  851.             lum += 2;

  852.             cb++;

  853.             cr++;

  854.         }

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

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

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

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

  859.     }

  860. }

  861. 

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

  863.                               int width, int height)

  864. {

  865.     uint8_t *p, *p1;

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

  867.     int w;

  868. 

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

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

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

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

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

  874.         p = p1;

  875.         lum = lum1;

  876.         cb = cb1;

  877.         cr = cr1;

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

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

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

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

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

  883.             p += 4;

  884.             lum += 2;

  885.             cb++;

  886.             cr++;

  887.         }

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

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

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

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

  892.     }

  893. }

  894. 

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

  896.                               int width, int height)

  897. {

  898.     const uint8_t *p, *p1;

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

  900.     int w;

  901. 

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

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

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

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

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

  907.         p = p1;

  908.         lum = lum1;

  909.         cb = cb1;

  910.         cr = cr1;

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

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

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

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

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

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

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

  918.             p += 6;

  919.             lum += 4;

  920.             cb++;

  921.             cr++;

  922.         }

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

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

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

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

  927.     }

  928. }

  929. 

  930. 

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

  932.                               int width, int height)

  933. {

  934.     int w, h;

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

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

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

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

  939. 

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

  941.         line1 = linesrc;

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

  943. 

  944.         lum1 = lumsrc;

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

  946. 

  947.         cb1 = cb2;

  948.         cr1 = cr2;

  949. 

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

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

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

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

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

  955.         }

  956. 

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

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

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

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

  961.     }

  962. }

  963. 

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

  965.                               int width, int height)

  966. {

  967.     int w, h;

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

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

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

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

  972. 

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

  974.         line1 = linesrc;

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

  976. 

  977.         lum1 = lumsrc;

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

  979. 

  980.         cb1 = cb2;

  981.         cr1 = cr2;

  982. 

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

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

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

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

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

  988.         }

  989. 

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

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

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

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

  994.     }

  995. }

  996. 

  997. #define SCALEBITS 10

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

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

  1000. 

  1001. #define YUV_TO_RGB1_CCIR(cb1, cr1)\

  1002. {\

  1003.     cb = (cb1) - 128;\

  1004.     cr = (cr1) - 128;\

  1005.     r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\

  1006.     g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \

  1007.             ONE_HALF;\

  1008.     b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\

  1009. }

  1010. 

  1011. #define YUV_TO_RGB2_CCIR(r, g, b, y1)\

  1012. {\

  1013.     y = ((y1) - 16) * FIX(255.0/219.0);\

  1014.     r = cm[(y + r_add) >> SCALEBITS];\

  1015.     g = cm[(y + g_add) >> SCALEBITS];\

  1016.     b = cm[(y + b_add) >> SCALEBITS];\

  1017. }

  1018. 

  1019. #define YUV_TO_RGB1(cb1, cr1)\

  1020. {\

  1021.     cb = (cb1) - 128;\

  1022.     cr = (cr1) - 128;\

  1023.     r_add = FIX(1.40200) * cr + ONE_HALF;\

  1024.     g_add = - FIX(0.34414) * cb - FIX(0.71414) * cr + ONE_HALF;\

  1025.     b_add = FIX(1.77200) * cb + ONE_HALF;\

  1026. }

  1027. 

  1028. #define YUV_TO_RGB2(r, g, b, y1)\

  1029. {\

  1030.     y = (y1) << SCALEBITS;\

  1031.     r = cm[(y + r_add) >> SCALEBITS];\

  1032.     g = cm[(y + g_add) >> SCALEBITS];\

  1033.     b = cm[(y + b_add) >> SCALEBITS];\

  1034. }

  1035. 

  1036. #define Y_CCIR_TO_JPEG(y)\

  1037.  cm[((y) * FIX(255.0/219.0) + (ONE_HALF - 16 * FIX(255.0/219.0))) >> SCALEBITS]

  1038. 

  1039. #define Y_JPEG_TO_CCIR(y)\

  1040.  (((y) * FIX(219.0/255.0) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)

  1041. 

  1042. #define C_CCIR_TO_JPEG(y)\

  1043.  cm[(((y) - 128) * FIX(127.0/112.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS]

  1044. 

  1045. /* NOTE: the clamp is really necessary! */

  1046. static inline int C_JPEG_TO_CCIR(int y) {

  1047.     y = (((y - 128) * FIX(112.0/127.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS);

  1048.     if (y < 16)

  1049.         y = 16;

  1050.     return y;

  1051. }

  1052. 

  1053. 

  1054. #define RGB_TO_Y(r, g, b) \

  1055. ((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \

  1056.   FIX(0.11400) * (b) + ONE_HALF) >> SCALEBITS)

  1057. 

  1058. #define RGB_TO_U(r1, g1, b1, shift)\

  1059. (((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +         \

  1060.      FIX(0.50000) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  1061. 

  1062. #define RGB_TO_V(r1, g1, b1, shift)\

  1063. (((FIX(0.50000) * r1 - FIX(0.41869) * g1 -           \

  1064.    FIX(0.08131) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  1065. 

  1066. #define RGB_TO_Y_CCIR(r, g, b) \

  1067. ((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \

  1068.   FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)

  1069. 

  1070. #define RGB_TO_U_CCIR(r1, g1, b1, shift)\

  1071. (((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 +         \

  1072.      FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  1073. 

  1074. #define RGB_TO_V_CCIR(r1, g1, b1, shift)\

  1075. (((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 -           \

  1076.    FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

  1077. 

  1078. static uint8_t y_ccir_to_jpeg[256];

  1079. static uint8_t y_jpeg_to_ccir[256];

  1080. static uint8_t c_ccir_to_jpeg[256];

  1081. static uint8_t c_jpeg_to_ccir[256];

  1082. 

  1083. /* init various conversion tables */

  1084. static void img_convert_init(void)

  1085. {

  1086.     int i;

  1087.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  1088. 

  1089.     for(i = 0;i < 256; i++) {

  1090.         y_ccir_to_jpeg[i] = Y_CCIR_TO_JPEG(i);

  1091.         y_jpeg_to_ccir[i] = Y_JPEG_TO_CCIR(i);

  1092.         c_ccir_to_jpeg[i] = C_CCIR_TO_JPEG(i);

  1093.         c_jpeg_to_ccir[i] = C_JPEG_TO_CCIR(i);

  1094.     }

  1095. }

  1096. 

  1097. /* apply to each pixel the given table */

  1098. static void img_apply_table(uint8_t *dst, int dst_wrap,

  1099.                             const uint8_t *src, int src_wrap,

  1100.                             int width, int height, const uint8_t *table1)

  1101. {

  1102.     int n;

  1103.     const uint8_t *s;

  1104.     uint8_t *d;

  1105.     const uint8_t *table;

  1106. 

  1107.     table = table1;

  1108.     for(;height > 0; height--) {

  1109.         s = src;

  1110.         d = dst;

  1111.         n = width;

  1112.         while (n >= 4) {

  1113.             d[0] = table[s[0]];

  1114.             d[1] = table[s[1]];

  1115.             d[2] = table[s[2]];

  1116.             d[3] = table[s[3]];

  1117.             d += 4;

  1118.             s += 4;

  1119.             n -= 4;

  1120.         }

  1121.         while (n > 0) {

  1122.             d[0] = table[s[0]];

  1123.             d++;

  1124.             s++;

  1125.             n--;

  1126.         }

  1127.         dst += dst_wrap;

  1128.         src += src_wrap;

  1129.     }

  1130. }

  1131. 

  1132. /* XXX: use generic filter ? */

  1133. /* XXX: in most cases, the sampling position is incorrect */

  1134. 

  1135. /* 4x1 -> 1x1 */

  1136. static void shrink41(uint8_t *dst, int dst_wrap,

  1137.                      const uint8_t *src, int src_wrap,

  1138.                      int width, int height)

  1139. {

  1140.     int w;

  1141.     const uint8_t *s;

  1142.     uint8_t *d;

  1143. 

  1144.     for(;height > 0; height--) {

  1145.         s = src;

  1146.         d = dst;

  1147.         for(w = width;w > 0; w--) {

  1148.             d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2;

  1149.             s += 4;

  1150.             d++;

  1151.         }

  1152.         src += src_wrap;

  1153.         dst += dst_wrap;

  1154.     }

  1155. }

  1156. 

  1157. /* 2x1 -> 1x1 */

  1158. static void shrink21(uint8_t *dst, int dst_wrap,

  1159.                      const uint8_t *src, int src_wrap,

  1160.                      int width, int height)

  1161. {

  1162.     int w;

  1163.     const uint8_t *s;

  1164.     uint8_t *d;

  1165. 

  1166.     for(;height > 0; height--) {

  1167.         s = src;

  1168.         d = dst;

  1169.         for(w = width;w > 0; w--) {

  1170.             d[0] = (s[0] + s[1]) >> 1;

  1171.             s += 2;

  1172.             d++;

  1173.         }

  1174.         src += src_wrap;

  1175.         dst += dst_wrap;

  1176.     }

  1177. }

  1178. 

  1179. /* 1x2 -> 1x1 */

  1180. static void shrink12(uint8_t *dst, int dst_wrap,

  1181.                      const uint8_t *src, int src_wrap,

  1182.                      int width, int height)

  1183. {

  1184.     int w;

  1185.     uint8_t *d;

  1186.     const uint8_t *s1, *s2;

  1187. 

  1188.     for(;height > 0; height--) {

  1189.         s1 = src;

  1190.         s2 = s1 + src_wrap;

  1191.         d = dst;

  1192.         for(w = width;w >= 4; w-=4) {

  1193.             d[0] = (s1[0] + s2[0]) >> 1;

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

  1195.             d[2] = (s1[2] + s2[2]) >> 1;

  1196.             d[3] = (s1[3] + s2[3]) >> 1;

  1197.             s1 += 4;

  1198.             s2 += 4;

  1199.             d += 4;

  1200.         }

  1201.         for(;w > 0; w--) {

  1202.             d[0] = (s1[0] + s2[0]) >> 1;

  1203.             s1++;

  1204.             s2++;

  1205.             d++;

  1206.         }

  1207.         src += 2 * src_wrap;

  1208.         dst += dst_wrap;

  1209.     }

  1210. }

  1211. 

  1212. /* 2x2 -> 1x1 */

  1213. static void shrink22(uint8_t *dst, int dst_wrap,

  1214.                      const uint8_t *src, int src_wrap,

  1215.                      int width, int height)

  1216. {

  1217.     int w;

  1218.     const uint8_t *s1, *s2;

  1219.     uint8_t *d;

  1220. 

  1221.     for(;height > 0; height--) {

  1222.         s1 = src;

  1223.         s2 = s1 + src_wrap;

  1224.         d = dst;

  1225.         for(w = width;w >= 4; w-=4) {

  1226.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  1227.             d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;

  1228.             d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;

  1229.             d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;

  1230.             s1 += 8;

  1231.             s2 += 8;

  1232.             d += 4;

  1233.         }

  1234.         for(;w > 0; w--) {

  1235.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;

  1236.             s1 += 2;

  1237.             s2 += 2;

  1238.             d++;

  1239.         }

  1240.         src += 2 * src_wrap;

  1241.         dst += dst_wrap;

  1242.     }

  1243. }

  1244. 

  1245. /* 4x4 -> 1x1 */

  1246. static void shrink44(uint8_t *dst, int dst_wrap,

  1247.                      const uint8_t *src, int src_wrap,

  1248.                      int width, int height)

  1249. {

  1250.     int w;

  1251.     const uint8_t *s1, *s2, *s3, *s4;

  1252.     uint8_t *d;

  1253. 

  1254.     for(;height > 0; height--) {

  1255.         s1 = src;

  1256.         s2 = s1 + src_wrap;

  1257.         s3 = s2 + src_wrap;

  1258.         s4 = s3 + src_wrap;

  1259.         d = dst;

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

  1261.             d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +

  1262.                     s2[0] + s2[1] + s2[2] + s2[3] +

  1263.                     s3[0] + s3[1] + s3[2] + s3[3] +

  1264.                     s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;

  1265.             s1 += 4;

  1266.             s2 += 4;

  1267.             s3 += 4;

  1268.             s4 += 4;

  1269.             d++;

  1270.         }

  1271.         src += 4 * src_wrap;

  1272.         dst += dst_wrap;

  1273.     }

  1274. }

  1275. 

  1276. static void grow21_line(uint8_t *dst, const uint8_t *src,

  1277.                         int width)

  1278. {

  1279.     int w;

  1280.     const uint8_t *s1;

  1281.     uint8_t *d;

  1282. 

  1283.     s1 = src;

  1284.     d = dst;

  1285.     for(w = width;w >= 4; w-=4) {

  1286.         d[1] = d[0] = s1[0];

  1287.         d[3] = d[2] = s1[1];

  1288.         s1 += 2;

  1289.         d += 4;

  1290.     }

  1291.     for(;w >= 2; w -= 2) {

  1292.         d[1] = d[0] = s1[0];

  1293.         s1 ++;

  1294.         d += 2;

  1295.     }

  1296.     /* only needed if width is not a multiple of two */

  1297.     /* XXX: veryfy that */

  1298.     if (w) {

  1299.         d[0] = s1[0];

  1300.     }

  1301. }

  1302. 

  1303. static void grow41_line(uint8_t *dst, const uint8_t *src,

  1304.                         int width)

  1305. {

  1306.     int w, v;

  1307.     const uint8_t *s1;

  1308.     uint8_t *d;

  1309. 

  1310.     s1 = src;

  1311.     d = dst;

  1312.     for(w = width;w >= 4; w-=4) {

  1313.         v = s1[0];

  1314.         d[0] = v;

  1315.         d[1] = v;

  1316.         d[2] = v;

  1317.         d[3] = v;

  1318.         s1 ++;

  1319.         d += 4;

  1320.     }

  1321. }

  1322. 

  1323. /* 1x1 -> 2x1 */

  1324. static void grow21(uint8_t *dst, int dst_wrap,

  1325.                    const uint8_t *src, int src_wrap,

  1326.                    int width, int height)

  1327. {

  1328.     for(;height > 0; height--) {

  1329.         grow21_line(dst, src, width);

  1330.         src += src_wrap;

  1331.         dst += dst_wrap;

  1332.     }

  1333. }

  1334. 

  1335. /* 1x1 -> 2x2 */

  1336. static void grow22(uint8_t *dst, int dst_wrap,

  1337.                    const uint8_t *src, int src_wrap,

  1338.                    int width, int height)

  1339. {

  1340.     for(;height > 0; height--) {

  1341.         grow21_line(dst, src, width);

  1342.         if (height%2)

  1343.             src += src_wrap;

  1344.         dst += dst_wrap;

  1345.     }

  1346. }

  1347. 

  1348. /* 1x1 -> 4x1 */

  1349. static void grow41(uint8_t *dst, int dst_wrap,

  1350.                    const uint8_t *src, int src_wrap,

  1351.                    int width, int height)

  1352. {

  1353.     for(;height > 0; height--) {

  1354.         grow41_line(dst, src, width);

  1355.         src += src_wrap;

  1356.         dst += dst_wrap;

  1357.     }

  1358. }

  1359. 

  1360. /* 1x1 -> 4x4 */

  1361. static void grow44(uint8_t *dst, int dst_wrap,

  1362.                    const uint8_t *src, int src_wrap,

  1363.                    int width, int height)

  1364. {

  1365.     for(;height > 0; height--) {

  1366.         grow41_line(dst, src, width);

  1367.         if ((height & 3) == 1)

  1368.             src += src_wrap;

  1369.         dst += dst_wrap;

  1370.     }

  1371. }

  1372. 

  1373. /* 1x2 -> 2x1 */

  1374. static void conv411(uint8_t *dst, int dst_wrap,

  1375.                     const uint8_t *src, int src_wrap,

  1376.                     int width, int height)

  1377. {

  1378.     int w, c;

  1379.     const uint8_t *s1, *s2;

  1380.     uint8_t *d;

  1381. 

  1382.     width>>=1;

  1383. 

  1384.     for(;height > 0; height--) {

  1385.         s1 = src;

  1386.         s2 = src + src_wrap;

  1387.         d = dst;

  1388.         for(w = width;w > 0; w--) {

  1389.             c = (s1[0] + s2[0]) >> 1;

  1390.             d[0] = c;

  1391.             d[1] = c;

  1392.             s1++;

  1393.             s2++;

  1394.             d += 2;

  1395.         }

  1396.         src += src_wrap * 2;

  1397.         dst += dst_wrap;

  1398.     }

  1399. }

  1400. 

  1401. /* XXX: add jpeg quantize code */

  1402. 

  1403. #define TRANSP_INDEX (6*6*6)

  1404. 

  1405. /* this is maybe slow, but allows for extensions */

  1406. static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)

  1407. {

  1408.     return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));

  1409. }

  1410. 

  1411. static void build_rgb_palette(uint8_t *palette, int has_alpha)

  1412. {

  1413.     uint32_t *pal;

  1414.     static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };

  1415.     int i, r, g, b;

  1416. 

  1417.     pal = (uint32_t *)palette;

  1418.     i = 0;

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

  1420.         for(g = 0; g < 6; g++) {

  1421.             for(b = 0; b < 6; b++) {

  1422.                 pal[i++] = (0xff << 24) | (pal_value[r] << 16) |

  1423.                     (pal_value[g] << 8) | pal_value[b];

  1424.             }

  1425.         }

  1426.     }

  1427.     if (has_alpha)

  1428.         pal[i++] = 0;

  1429.     while (i < 256)

  1430.         pal[i++] = 0xff000000;

  1431. }

  1432. 

  1433. /* copy bit n to bits 0 ... n - 1 */

  1434. static inline unsigned int bitcopy_n(unsigned int a, int n)

  1435. {

  1436.     int mask;

  1437.     mask = (1 << n) - 1;

  1438.     return (a & (0xff & ~mask)) | ((-((a >> n) & 1)) & mask);

  1439. }

  1440. 

  1441. /* rgb555 handling */

  1442. 

  1443. #define RGB_NAME rgb555

  1444. 

  1445. #define RGB_IN(r, g, b, s)\

  1446. {\

  1447.     unsigned int v = ((const uint16_t *)(s))[0];\

  1448.     r = bitcopy_n(v >> (10 - 3), 3);\

  1449.     g = bitcopy_n(v >> (5 - 3), 3);\

  1450.     b = bitcopy_n(v << 3, 3);\

  1451. }

  1452. 

  1453. #define RGBA_IN(r, g, b, a, s)\

  1454. {\

  1455.     unsigned int v = ((const uint16_t *)(s))[0];\

  1456.     r = bitcopy_n(v >> (10 - 3), 3);\

  1457.     g = bitcopy_n(v >> (5 - 3), 3);\

  1458.     b = bitcopy_n(v << 3, 3);\

  1459.     a = (-(v >> 15)) & 0xff;\

  1460. }

  1461. 

  1462. #define RGBA_OUT(d, r, g, b, a)\

  1463. {\

  1464.     ((uint16_t *)(d))[0] = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3) | \

  1465.                            ((a << 8) & 0x8000);\

  1466. }

  1467. 

  1468. #define BPP 2

  1469. 

  1470. #include "imgconvert_template.h"

  1471. 

  1472. /* rgb565 handling */

  1473. 

  1474. #define RGB_NAME rgb565

  1475. 

  1476. #define RGB_IN(r, g, b, s)\

  1477. {\

  1478.     unsigned int v = ((const uint16_t *)(s))[0];\

  1479.     r = bitcopy_n(v >> (11 - 3), 3);\

  1480.     g = bitcopy_n(v >> (5 - 2), 2);\

  1481.     b = bitcopy_n(v << 3, 3);\

  1482. }

  1483. 

  1484. #define RGB_OUT(d, r, g, b)\

  1485. {\

  1486.     ((uint16_t *)(d))[0] = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);\

  1487. }

  1488. 

  1489. #define BPP 2

  1490. 

  1491. #include "imgconvert_template.h"

  1492. 

  1493. /* bgr24 handling */

  1494. 

  1495. #define RGB_NAME bgr24

  1496. 

  1497. #define RGB_IN(r, g, b, s)\

  1498. {\

  1499.     b = (s)[0];\

  1500.     g = (s)[1];\

  1501.     r = (s)[2];\

  1502. }

  1503. 

  1504. #define RGB_OUT(d, r, g, b)\

  1505. {\

  1506.     (d)[0] = b;\

  1507.     (d)[1] = g;\

  1508.     (d)[2] = r;\

  1509. }

  1510. 

  1511. #define BPP 3

  1512. 

  1513. #include "imgconvert_template.h"

  1514. 

  1515. #undef RGB_IN

  1516. #undef RGB_OUT

  1517. #undef BPP

  1518. 

  1519. /* rgb24 handling */

  1520. 

  1521. #define RGB_NAME rgb24

  1522. #define FMT_RGB24

  1523. 

  1524. #define RGB_IN(r, g, b, s)\

  1525. {\

  1526.     r = (s)[0];\

  1527.     g = (s)[1];\

  1528.     b = (s)[2];\

  1529. }

  1530. 

  1531. #define RGB_OUT(d, r, g, b)\

  1532. {\

  1533.     (d)[0] = r;\

  1534.     (d)[1] = g;\

  1535.     (d)[2] = b;\

  1536. }

  1537. 

  1538. #define BPP 3

  1539. 

  1540. #include "imgconvert_template.h"

  1541. 

  1542. /* rgba32 handling */

  1543. 

  1544. #define RGB_NAME rgba32

  1545. #define FMT_RGBA32

  1546. 

  1547. #define RGB_IN(r, g, b, s)\

  1548. {\

  1549.     unsigned int v = ((const uint32_t *)(s))[0];\

  1550.     r = (v >> 16) & 0xff;\

  1551.     g = (v >> 8) & 0xff;\

  1552.     b = v & 0xff;\

  1553. }

  1554. 

  1555. #define RGBA_IN(r, g, b, a, s)\

  1556. {\

  1557.     unsigned int v = ((const uint32_t *)(s))[0];\

  1558.     a = (v >> 24) & 0xff;\

  1559.     r = (v >> 16) & 0xff;\

  1560.     g = (v >> 8) & 0xff;\

  1561.     b = v & 0xff;\

  1562. }

  1563. 

  1564. #define RGBA_OUT(d, r, g, b, a)\

  1565. {\

  1566.     ((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;\

  1567. }

  1568. 

  1569. #define BPP 4

  1570. 

  1571. #include "imgconvert_template.h"

  1572. 

  1573. static void mono_to_gray(AVPicture *dst, const AVPicture *src,

  1574.                          int width, int height, int xor_mask)

  1575. {

  1576.     const unsigned char *p;

  1577.     unsigned char *q;

  1578.     int v, dst_wrap, src_wrap;

  1579.     int y, w;

  1580. 

  1581.     p = src->data[0];

  1582.     src_wrap = src->linesize[0] - ((width + 7) >> 3);

  1583. 

  1584.     q = dst->data[0];

  1585.     dst_wrap = dst->linesize[0] - width;

  1586.     for(y=0;y<height;y++) {

  1587.         w = width;

  1588.         while (w >= 8) {

  1589.             v = *p++ ^ xor_mask;

  1590.             q[0] = -(v >> 7);

  1591.             q[1] = -((v >> 6) & 1);

  1592.             q[2] = -((v >> 5) & 1);

  1593.             q[3] = -((v >> 4) & 1);

  1594.             q[4] = -((v >> 3) & 1);

  1595.             q[5] = -((v >> 2) & 1);

  1596.             q[6] = -((v >> 1) & 1);

  1597.             q[7] = -((v >> 0) & 1);

  1598.             w -= 8;

  1599.             q += 8;

  1600.         }

  1601.         if (w > 0) {

  1602.             v = *p++ ^ xor_mask;

  1603.             do {

  1604.                 q[0] = -((v >> 7) & 1);

  1605.                 q++;

  1606.                 v <<= 1;

  1607.             } while (--w);

  1608.         }

  1609.         p += src_wrap;

  1610.         q += dst_wrap;

  1611.     }

  1612. }

  1613. 

  1614. static void monowhite_to_gray(AVPicture *dst, const AVPicture *src,

  1615.                                int width, int height)

  1616. {

  1617.     mono_to_gray(dst, src, width, height, 0xff);

  1618. }

  1619. 

  1620. static void monoblack_to_gray(AVPicture *dst, const AVPicture *src,

  1621.                                int width, int height)

  1622. {

  1623.     mono_to_gray(dst, src, width, height, 0x00);

  1624. }

  1625. 

  1626. static void gray_to_mono(AVPicture *dst, const AVPicture *src,

  1627.                          int width, int height, int xor_mask)

  1628. {

  1629.     int n;

  1630.     const uint8_t *s;

  1631.     uint8_t *d;

  1632.     int j, b, v, n1, src_wrap, dst_wrap, y;

  1633. 

  1634.     s = src->data[0];

  1635.     src_wrap = src->linesize[0] - width;

  1636. 

  1637.     d = dst->data[0];

  1638.     dst_wrap = dst->linesize[0] - ((width + 7) >> 3);

  1639. 

  1640.     for(y=0;y<height;y++) {

  1641.         n = width;

  1642.         while (n >= 8) {

  1643.             v = 0;

  1644.             for(j=0;j<8;j++) {

  1645.                 b = s[0];

  1646.                 s++;

  1647.                 v = (v << 1) | (b >> 7);

  1648.             }

  1649.             d[0] = v ^ xor_mask;

  1650.             d++;

  1651.             n -= 8;

  1652.         }

  1653.         if (n > 0) {

  1654.             n1 = n;

  1655.             v = 0;

  1656.             while (n > 0) {

  1657.                 b = s[0];

  1658.                 s++;

  1659.                 v = (v << 1) | (b >> 7);

  1660.                 n--;

  1661.             }

  1662.             d[0] = (v << (8 - (n1 & 7))) ^ xor_mask;

  1663.             d++;

  1664.         }

  1665.         s += src_wrap;

  1666.         d += dst_wrap;

  1667.     }

  1668. }

  1669. 

  1670. static void gray_to_monowhite(AVPicture *dst, const AVPicture *src,

  1671.                               int width, int height)

  1672. {

  1673.     gray_to_mono(dst, src, width, height, 0xff);

  1674. }

  1675. 

  1676. static void gray_to_monoblack(AVPicture *dst, const AVPicture *src,

  1677.                               int width, int height)

  1678. {

  1679.     gray_to_mono(dst, src, width, height, 0x00);

  1680. }

  1681. 

  1682. typedef struct ConvertEntry {

  1683.     void (*convert)(AVPicture *dst,

  1684.                     const AVPicture *src, int width, int height);

  1685. } ConvertEntry;

  1686. 

  1687. /* Add each new convertion function in this table. In order to be able

  1688.    to convert from any format to any format, the following constraints

  1689.    must be satisfied:

  1690. 

  1691.    - all FF_COLOR_RGB formats must convert to and from PIX_FMT_RGB24

  1692. 

  1693.    - all FF_COLOR_GRAY formats must convert to and from PIX_FMT_GRAY8

  1694. 

  1695.    - all FF_COLOR_RGB formats with alpha must convert to and from PIX_FMT_RGBA32

  1696. 

  1697.    - PIX_FMT_YUV444P and PIX_FMT_YUVJ444P must convert to and from

  1698.      PIX_FMT_RGB24.

  1699. 

  1700.    - PIX_FMT_422 must convert to and from PIX_FMT_422P.

  1701. 

  1702.    The other conversion functions are just optimisations for common cases.

  1703. */

  1704. static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {

  1705.     [PIX_FMT_YUV420P] = {

  1706.         [PIX_FMT_YUV422] = {

  1707.             .convert = yuv420p_to_yuv422,

  1708.         },

  1709.         [PIX_FMT_RGB555] = {

  1710.             .convert = yuv420p_to_rgb555

  1711.         },

  1712.         [PIX_FMT_RGB565] = {

  1713.             .convert = yuv420p_to_rgb565

  1714.         },

  1715.         [PIX_FMT_BGR24] = {

  1716.             .convert = yuv420p_to_bgr24

  1717.         },

  1718.         [PIX_FMT_RGB24] = {

  1719.             .convert = yuv420p_to_rgb24

  1720.         },

  1721.         [PIX_FMT_RGBA32] = {

  1722.             .convert = yuv420p_to_rgba32

  1723.         },

  1724.         [PIX_FMT_UYVY422] = {

  1725.             .convert = yuv420p_to_uyvy422,

  1726.         },

  1727.     },

  1728.     [PIX_FMT_YUV422P] = {

  1729.         [PIX_FMT_YUV422] = {

  1730.             .convert = yuv422p_to_yuv422,

  1731.         },

  1732.         [PIX_FMT_UYVY422] = {

  1733.             .convert = yuv422p_to_uyvy422,

  1734.         },

  1735.     },

  1736.     [PIX_FMT_YUV444P] = {

  1737.         [PIX_FMT_RGB24] = {

  1738.             .convert = yuv444p_to_rgb24

  1739.         },

  1740.     },

  1741.     [PIX_FMT_YUVJ420P] = {

  1742.         [PIX_FMT_RGB555] = {

  1743.             .convert = yuvj420p_to_rgb555

  1744.         },

  1745.         [PIX_FMT_RGB565] = {

  1746.             .convert = yuvj420p_to_rgb565

  1747.         },

  1748.         [PIX_FMT_BGR24] = {

  1749.             .convert = yuvj420p_to_bgr24

  1750.         },

  1751.         [PIX_FMT_RGB24] = {

  1752.             .convert = yuvj420p_to_rgb24

  1753.         },

  1754.         [PIX_FMT_RGBA32] = {

  1755.             .convert = yuvj420p_to_rgba32

  1756.         },

  1757.     },

  1758.     [PIX_FMT_YUVJ444P] = {

  1759.         [PIX_FMT_RGB24] = {

  1760.             .convert = yuvj444p_to_rgb24

  1761.         },

  1762.     },

  1763.     [PIX_FMT_YUV422] = {

  1764.         [PIX_FMT_YUV420P] = {

  1765.             .convert = yuv422_to_yuv420p,

  1766.         },

  1767.         [PIX_FMT_YUV422P] = {

  1768.             .convert = yuv422_to_yuv422p,

  1769.         },

  1770.     },

  1771.     [PIX_FMT_UYVY422] = {

  1772.         [PIX_FMT_YUV420P] = {

  1773.             .convert = uyvy422_to_yuv420p,

  1774.         },

  1775.         [PIX_FMT_YUV422P] = {

  1776.             .convert = uyvy422_to_yuv422p,

  1777.         },

  1778.     },

  1779.     [PIX_FMT_RGB24] = {

  1780.         [PIX_FMT_YUV420P] = {

  1781.             .convert = rgb24_to_yuv420p

  1782.         },

  1783.         [PIX_FMT_RGB565] = {

  1784.             .convert = rgb24_to_rgb565

  1785.         },

  1786.         [PIX_FMT_RGB555] = {

  1787.             .convert = rgb24_to_rgb555

  1788.         },

  1789.         [PIX_FMT_RGBA32] = {

  1790.             .convert = rgb24_to_rgba32

  1791.         },

  1792.         [PIX_FMT_BGR24] = {

  1793.             .convert = rgb24_to_bgr24

  1794.         },

  1795.         [PIX_FMT_GRAY8] = {

  1796.             .convert = rgb24_to_gray

  1797.         },

  1798.         [PIX_FMT_PAL8] = {

  1799.             .convert = rgb24_to_pal8

  1800.         },

  1801.         [PIX_FMT_YUV444P] = {

  1802.             .convert = rgb24_to_yuv444p

  1803.         },

  1804.         [PIX_FMT_YUVJ420P] = {

  1805.             .convert = rgb24_to_yuvj420p

  1806.         },

  1807.         [PIX_FMT_YUVJ444P] = {

  1808.             .convert = rgb24_to_yuvj444p

  1809.         },

  1810.     },

  1811.     [PIX_FMT_RGBA32] = {

  1812.         [PIX_FMT_RGB24] = {

  1813.             .convert = rgba32_to_rgb24

  1814.         },

  1815.         [PIX_FMT_RGB555] = {

  1816.             .convert = rgba32_to_rgb555

  1817.         },

  1818.         [PIX_FMT_PAL8] = {

  1819.             .convert = rgba32_to_pal8

  1820.         },

  1821.         [PIX_FMT_YUV420P] = {

  1822.             .convert = rgba32_to_yuv420p

  1823.         },

  1824.         [PIX_FMT_GRAY8] = {

  1825.             .convert = rgba32_to_gray

  1826.         },

  1827.     },

  1828.     [PIX_FMT_BGR24] = {

  1829.         [PIX_FMT_RGB24] = {

  1830.             .convert = bgr24_to_rgb24

  1831.         },

  1832.         [PIX_FMT_YUV420P] = {

  1833.             .convert = bgr24_to_yuv420p

  1834.         },

  1835.         [PIX_FMT_GRAY8] = {

  1836.             .convert = bgr24_to_gray

  1837.         },

  1838.     },

  1839.     [PIX_FMT_RGB555] = {

  1840.         [PIX_FMT_RGB24] = {

  1841.             .convert = rgb555_to_rgb24

  1842.         },

  1843.         [PIX_FMT_RGBA32] = {

  1844.             .convert = rgb555_to_rgba32

  1845.         },

  1846.         [PIX_FMT_YUV420P] = {

  1847.             .convert = rgb555_to_yuv420p

  1848.         },

  1849.         [PIX_FMT_GRAY8] = {

  1850.             .convert = rgb555_to_gray

  1851.         },

  1852.     },

  1853.     [PIX_FMT_RGB565] = {

  1854.         [PIX_FMT_RGB24] = {

  1855.             .convert = rgb565_to_rgb24

  1856.         },

  1857.         [PIX_FMT_YUV420P] = {

  1858.             .convert = rgb565_to_yuv420p

  1859.         },

  1860.         [PIX_FMT_GRAY8] = {

  1861.             .convert = rgb565_to_gray

  1862.         },

  1863.     },

  1864.     [PIX_FMT_GRAY8] = {

  1865.         [PIX_FMT_RGB555] = {

  1866.             .convert = gray_to_rgb555

  1867.         },

  1868.         [PIX_FMT_RGB565] = {

  1869.             .convert = gray_to_rgb565

  1870.         },

  1871.         [PIX_FMT_RGB24] = {

  1872.             .convert = gray_to_rgb24

  1873.         },

  1874.         [PIX_FMT_BGR24] = {

  1875.             .convert = gray_to_bgr24

  1876.         },

  1877.         [PIX_FMT_RGBA32] = {

  1878.             .convert = gray_to_rgba32

  1879.         },

  1880.         [PIX_FMT_MONOWHITE] = {

  1881.             .convert = gray_to_monowhite

  1882.         },

  1883.         [PIX_FMT_MONOBLACK] = {

  1884.             .convert = gray_to_monoblack

  1885.         },

  1886.     },

  1887.     [PIX_FMT_MONOWHITE] = {

  1888.         [PIX_FMT_GRAY8] = {

  1889.             .convert = monowhite_to_gray

  1890.         },

  1891.     },

  1892.     [PIX_FMT_MONOBLACK] = {

  1893.         [PIX_FMT_GRAY8] = {

  1894.             .convert = monoblack_to_gray

  1895.         },

  1896.     },

  1897.     [PIX_FMT_PAL8] = {

  1898.         [PIX_FMT_RGB555] = {

  1899.             .convert = pal8_to_rgb555

  1900.         },

  1901.         [PIX_FMT_RGB565] = {

  1902.             .convert = pal8_to_rgb565

  1903.         },

  1904.         [PIX_FMT_BGR24] = {

  1905.             .convert = pal8_to_bgr24

  1906.         },

  1907.         [PIX_FMT_RGB24] = {

  1908.             .convert = pal8_to_rgb24

  1909.         },

  1910.         [PIX_FMT_RGBA32] = {

  1911.             .convert = pal8_to_rgba32

  1912.         },

  1913.     },

  1914.     [PIX_FMT_UYVY411] = {

  1915.         [PIX_FMT_YUV411P] = {

  1916.             .convert = uyvy411_to_yuv411p,

  1917.         },

  1918.     },

  1919. 

  1920. };

  1921. 

  1922. int avpicture_alloc(AVPicture *picture,

  1923.                            int pix_fmt, int width, int height)

  1924. {

  1925.     unsigned int size;

  1926.     void *ptr;

  1927. 

  1928.     size = avpicture_get_size(pix_fmt, width, height);

  1929.     if(size<0)

  1930.         goto fail;

  1931.     ptr = av_malloc(size);

  1932.     if (!ptr)

  1933.         goto fail;

  1934.     avpicture_fill(picture, ptr, pix_fmt, width, height);

  1935.     return 0;

  1936.  fail:

  1937.     memset(picture, 0, sizeof(AVPicture));

  1938.     return -1;

  1939. }

  1940. 

  1941. void avpicture_free(AVPicture *picture)

  1942. {

  1943.     av_free(picture->data[0]);

  1944. }

  1945. 

  1946. /* return true if yuv planar */

  1947. static inline int is_yuv_planar(PixFmtInfo *ps)

  1948. {

  1949.     return (ps->color_type == FF_COLOR_YUV ||

  1950.             ps->color_type == FF_COLOR_YUV_JPEG) &&

  1951.         ps->pixel_type == FF_PIXEL_PLANAR;

  1952. }

  1953. 

  1954. /**

  1955.  * Crop image top and left side

  1956.  */

  1957. int img_crop(AVPicture *dst, const AVPicture *src,

  1958.               int pix_fmt, int top_band, int left_band)

  1959. {

  1960.     int y_shift;

  1961.     int x_shift;

  1962. 

  1963.     if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))

  1964.         return -1;

  1965. 

  1966.     y_shift = pix_fmt_info[pix_fmt].y_chroma_shift;

  1967.     x_shift = pix_fmt_info[pix_fmt].x_chroma_shift;

  1968. 

  1969.     dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;

  1970.     dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);

  1971.     dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);

  1972. 

  1973.     dst->linesize[0] = src->linesize[0];

  1974.     dst->linesize[1] = src->linesize[1];

  1975.     dst->linesize[2] = src->linesize[2];

  1976.     return 0;

  1977. }

  1978. 

  1979. /* XXX: always use linesize. Return -1 if not supported */

  1980. int img_convert(AVPicture *dst, int dst_pix_fmt,

  1981.                 const AVPicture *src, int src_pix_fmt,

  1982.                 int src_width, int src_height)

  1983. {

  1984.     static int inited;

  1985.     int i, ret, dst_width, dst_height, int_pix_fmt;

  1986.     PixFmtInfo *src_pix, *dst_pix;

  1987.     ConvertEntry *ce;

  1988.     AVPicture tmp1, *tmp = &tmp1;

  1989. 

  1990.     if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB ||

  1991.         dst_pix_fmt < 0 || dst_pix_fmt >= PIX_FMT_NB)

  1992.         return -1;

  1993.     if (src_width <= 0 || src_height <= 0)

  1994.         return 0;

  1995. 

  1996.     if (!inited) {

  1997.         inited = 1;

  1998.         img_convert_init();

  1999.     }

  2000. 

  2001.     dst_width = src_width;

  2002.     dst_height = src_height;

  2003. 

  2004.     dst_pix = &pix_fmt_info[dst_pix_fmt];

  2005.     src_pix = &pix_fmt_info[src_pix_fmt];

  2006.     if (src_pix_fmt == dst_pix_fmt) {

  2007.         /* no conversion needed: just copy */

  2008.         img_copy(dst, src, dst_pix_fmt, dst_width, dst_height);

  2009.         return 0;

  2010.     }

  2011. 

  2012.     ce = &convert_table[src_pix_fmt][dst_pix_fmt];

  2013.     if (ce->convert) {

  2014.         /* specific conversion routine */

  2015.         ce->convert(dst, src, dst_width, dst_height);

  2016.         return 0;

  2017.     }

  2018. 

  2019.     /* gray to YUV */

  2020.     if (is_yuv_planar(dst_pix) &&

  2021.         src_pix_fmt == PIX_FMT_GRAY8) {

  2022.         int w, h, y;

  2023.         uint8_t *d;

  2024. 

  2025.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG) {

  2026.             img_copy_plane(dst->data[0], dst->linesize[0],

  2027.                      src->data[0], src->linesize[0],

  2028.                      dst_width, dst_height);

  2029.         } else {

  2030.             img_apply_table(dst->data[0], dst->linesize[0],

  2031.                             src->data[0], src->linesize[0],

  2032.                             dst_width, dst_height,

  2033.                             y_jpeg_to_ccir);

  2034.         }

  2035.         /* fill U and V with 128 */

  2036.         w = dst_width;

  2037.         h = dst_height;

  2038.         w >>= dst_pix->x_chroma_shift;

  2039.         h >>= dst_pix->y_chroma_shift;

  2040.         for(i = 1; i <= 2; i++) {

  2041.             d = dst->data[i];

  2042.             for(y = 0; y< h; y++) {

  2043.                 memset(d, 128, w);

  2044.                 d += dst->linesize[i];

  2045.             }

  2046.         }

  2047.         return 0;

  2048.     }

  2049. 

  2050.     /* YUV to gray */

  2051.     if (is_yuv_planar(src_pix) &&

  2052.         dst_pix_fmt == PIX_FMT_GRAY8) {

  2053.         if (src_pix->color_type == FF_COLOR_YUV_JPEG) {

  2054.             img_copy_plane(dst->data[0], dst->linesize[0],

  2055.                      src->data[0], src->linesize[0],

  2056.                      dst_width, dst_height);

  2057.         } else {

  2058.             img_apply_table(dst->data[0], dst->linesize[0],

  2059.                             src->data[0], src->linesize[0],

  2060.                             dst_width, dst_height,

  2061.                             y_ccir_to_jpeg);

  2062.         }

  2063.         return 0;

  2064.     }

  2065. 

  2066.     /* YUV to YUV planar */

  2067.     if (is_yuv_planar(dst_pix) && is_yuv_planar(src_pix)) {

  2068.         int x_shift, y_shift, w, h, xy_shift;

  2069.         void (*resize_func)(uint8_t *dst, int dst_wrap,

  2070.                             const uint8_t *src, int src_wrap,

  2071.                             int width, int height);

  2072. 

  2073.         /* compute chroma size of the smallest dimensions */

  2074.         w = dst_width;

  2075.         h = dst_height;

  2076.         if (dst_pix->x_chroma_shift >= src_pix->x_chroma_shift)

  2077.             w >>= dst_pix->x_chroma_shift;

  2078.         else

  2079.             w >>= src_pix->x_chroma_shift;

  2080.         if (dst_pix->y_chroma_shift >= src_pix->y_chroma_shift)

  2081.             h >>= dst_pix->y_chroma_shift;

  2082.         else

  2083.             h >>= src_pix->y_chroma_shift;

  2084. 

  2085.         x_shift = (dst_pix->x_chroma_shift - src_pix->x_chroma_shift);

  2086.         y_shift = (dst_pix->y_chroma_shift - src_pix->y_chroma_shift);

  2087.         xy_shift = ((x_shift & 0xf) << 4) | (y_shift & 0xf);

  2088.         /* there must be filters for conversion at least from and to

  2089.            YUV444 format */

  2090.         switch(xy_shift) {

  2091.         case 0x00:

  2092.             resize_func = img_copy_plane;

  2093.             break;

  2094.         case 0x10:

  2095.             resize_func = shrink21;

  2096.             break;

  2097.         case 0x20:

  2098.             resize_func = shrink41;

  2099.             break;

  2100.         case 0x01:

  2101.             resize_func = shrink12;

  2102.             break;

  2103.         case 0x11:

  2104.             resize_func = shrink22;

  2105.             break;

  2106.         case 0x22:

  2107.             resize_func = shrink44;

  2108.             break;

  2109.         case 0xf0:

  2110.             resize_func = grow21;

  2111.             break;

  2112.         case 0xe0:

  2113.             resize_func = grow41;

  2114.             break;

  2115.         case 0xff:

  2116.             resize_func = grow22;

  2117.             break;

  2118.         case 0xee:

  2119.             resize_func = grow44;

  2120.             break;

  2121.         case 0xf1:

  2122.             resize_func = conv411;

  2123.             break;

  2124.         default:

  2125.             /* currently not handled */

  2126.             goto no_chroma_filter;

  2127.         }

  2128. 

  2129.         img_copy_plane(dst->data[0], dst->linesize[0],

  2130.                        src->data[0], src->linesize[0],

  2131.                        dst_width, dst_height);

  2132. 

  2133.         for(i = 1;i <= 2; i++)

  2134.             resize_func(dst->data[i], dst->linesize[i],

  2135.                         src->data[i], src->linesize[i],

  2136.                         dst_width>>dst_pix->x_chroma_shift, dst_height>>dst_pix->y_chroma_shift);

  2137.         /* if yuv color space conversion is needed, we do it here on

  2138.            the destination image */

  2139.         if (dst_pix->color_type != src_pix->color_type) {

  2140.             const uint8_t *y_table, *c_table;

  2141.             if (dst_pix->color_type == FF_COLOR_YUV) {

  2142.                 y_table = y_jpeg_to_ccir;

  2143.                 c_table = c_jpeg_to_ccir;

  2144.             } else {

  2145.                 y_table = y_ccir_to_jpeg;

  2146.                 c_table = c_ccir_to_jpeg;

  2147.             }

  2148.             img_apply_table(dst->data[0], dst->linesize[0],

  2149.                             dst->data[0], dst->linesize[0],

  2150.                             dst_width, dst_height,

  2151.                             y_table);

  2152. 

  2153.             for(i = 1;i <= 2; i++)

  2154.                 img_apply_table(dst->data[i], dst->linesize[i],

  2155.                                 dst->data[i], dst->linesize[i],

  2156.                                 dst_width>>dst_pix->x_chroma_shift,

  2157.                                 dst_height>>dst_pix->y_chroma_shift,

  2158.                                 c_table);

  2159.         }

  2160.         return 0;

  2161.     }

  2162.  no_chroma_filter:

  2163. 

  2164.     /* try to use an intermediate format */

  2165.     if (src_pix_fmt == PIX_FMT_YUV422 ||

  2166.         dst_pix_fmt == PIX_FMT_YUV422) {

  2167.         /* specific case: convert to YUV422P first */

  2168.         int_pix_fmt = PIX_FMT_YUV422P;

  2169.     } else if (src_pix_fmt == PIX_FMT_UYVY422 ||

  2170.         dst_pix_fmt == PIX_FMT_UYVY422) {

  2171.         /* specific case: convert to YUV422P first */

  2172.         int_pix_fmt = PIX_FMT_YUV422P;

  2173.     } else if (src_pix_fmt == PIX_FMT_UYVY411 ||

  2174.         dst_pix_fmt == PIX_FMT_UYVY411) {

  2175.         /* specific case: convert to YUV411P first */

  2176.         int_pix_fmt = PIX_FMT_YUV411P;

  2177.     } else if ((src_pix->color_type == FF_COLOR_GRAY &&

  2178.                 src_pix_fmt != PIX_FMT_GRAY8) ||

  2179.                (dst_pix->color_type == FF_COLOR_GRAY &&

  2180.                 dst_pix_fmt != PIX_FMT_GRAY8)) {

  2181.         /* gray8 is the normalized format */

  2182.         int_pix_fmt = PIX_FMT_GRAY8;

  2183.     } else if ((is_yuv_planar(src_pix) &&

  2184.                 src_pix_fmt != PIX_FMT_YUV444P &&

  2185.                 src_pix_fmt != PIX_FMT_YUVJ444P)) {

  2186.         /* yuv444 is the normalized format */

  2187.         if (src_pix->color_type == FF_COLOR_YUV_JPEG)

  2188.             int_pix_fmt = PIX_FMT_YUVJ444P;

  2189.         else

  2190.             int_pix_fmt = PIX_FMT_YUV444P;

  2191.     } else if ((is_yuv_planar(dst_pix) &&

  2192.                 dst_pix_fmt != PIX_FMT_YUV444P &&

  2193.                 dst_pix_fmt != PIX_FMT_YUVJ444P)) {

  2194.         /* yuv444 is the normalized format */

  2195.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG)

  2196.             int_pix_fmt = PIX_FMT_YUVJ444P;

  2197.         else

  2198.             int_pix_fmt = PIX_FMT_YUV444P;

  2199.     } else {

  2200.         /* the two formats are rgb or gray8 or yuv[j]444p */

  2201.         if (src_pix->is_alpha && dst_pix->is_alpha)

  2202.             int_pix_fmt = PIX_FMT_RGBA32;

  2203.         else

  2204.             int_pix_fmt = PIX_FMT_RGB24;

  2205.     }

  2206.     if (avpicture_alloc(tmp, int_pix_fmt, dst_width, dst_height) < 0)

  2207.         return -1;

  2208.     ret = -1;

  2209.     if (img_convert(tmp, int_pix_fmt,

  2210.                     src, src_pix_fmt, src_width, src_height) < 0)

  2211.         goto fail1;

  2212.     if (img_convert(dst, dst_pix_fmt,

  2213.                     tmp, int_pix_fmt, dst_width, dst_height) < 0)

  2214.         goto fail1;

  2215.     ret = 0;

  2216.  fail1:

  2217.     avpicture_free(tmp);

  2218.     return ret;

  2219. }

  2220. 

  2221. /* NOTE: we scan all the pixels to have an exact information */

  2222. static int get_alpha_info_pal8(const AVPicture *src, int width, int height)

  2223. {

  2224.     const unsigned char *p;

  2225.     int src_wrap, ret, x, y;

  2226.     unsigned int a;

  2227.     uint32_t *palette = (uint32_t *)src->data[1];

  2228. 

  2229.     p = src->data[0];

  2230.     src_wrap = src->linesize[0] - width;

  2231.     ret = 0;

  2232.     for(y=0;y<height;y++) {

  2233.         for(x=0;x<width;x++) {

  2234.             a = palette[p[0]] >> 24;

  2235.             if (a == 0x00) {

  2236.                 ret |= FF_ALPHA_TRANSP;

  2237.             } else if (a != 0xff) {

  2238.                 ret |= FF_ALPHA_SEMI_TRANSP;

  2239.             }

  2240.             p++;

  2241.         }

  2242.         p += src_wrap;

  2243.     }

  2244.     return ret;

  2245. }

  2246. 

  2247. /**

  2248.  * Tell if an image really has transparent alpha values.

  2249.  * @return ored mask of FF_ALPHA_xxx constants

  2250.  */

  2251. int img_get_alpha_info(const AVPicture *src,

  2252.                        int pix_fmt, int width, int height)

  2253. {

  2254.     PixFmtInfo *pf = &pix_fmt_info[pix_fmt];

  2255.     int ret;

  2256. 

  2257.     pf = &pix_fmt_info[pix_fmt];

  2258.     /* no alpha can be represented in format */

  2259.     if (!pf->is_alpha)

  2260.         return 0;

  2261.     switch(pix_fmt) {

  2262.     case PIX_FMT_RGBA32:

  2263.         ret = get_alpha_info_rgba32(src, width, height);

  2264.         break;

  2265.     case PIX_FMT_RGB555:

  2266.         ret = get_alpha_info_rgb555(src, width, height);

  2267.         break;

  2268.     case PIX_FMT_PAL8:

  2269.         ret = get_alpha_info_pal8(src, width, height);

  2270.         break;

  2271.     default:

  2272.         /* we do not know, so everything is indicated */

  2273.         ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;

  2274.         break;

  2275.     }

  2276.     return ret;

  2277. }

  2278. 

  2279. #ifdef HAVE_MMX

  2280. #define DEINT_INPLACE_LINE_LUM \

  2281.                     movd_m2r(lum_m4[0],mm0);\

  2282.                     movd_m2r(lum_m3[0],mm1);\

  2283.                     movd_m2r(lum_m2[0],mm2);\

  2284.                     movd_m2r(lum_m1[0],mm3);\

  2285.                     movd_m2r(lum[0],mm4);\

  2286.                     punpcklbw_r2r(mm7,mm0);\

  2287.                     movd_r2m(mm2,lum_m4[0]);\

  2288.                     punpcklbw_r2r(mm7,mm1);\

  2289.                     punpcklbw_r2r(mm7,mm2);\

  2290.                     punpcklbw_r2r(mm7,mm3);\

  2291.                     punpcklbw_r2r(mm7,mm4);\

  2292.                     paddw_r2r(mm3,mm1);\

  2293.                     psllw_i2r(1,mm2);\

  2294.                     paddw_r2r(mm4,mm0);\

  2295.                     psllw_i2r(2,mm1);\

  2296.                     paddw_r2r(mm6,mm2);\

  2297.                     paddw_r2r(mm2,mm1);\

  2298.                     psubusw_r2r(mm0,mm1);\

  2299.                     psrlw_i2r(3,mm1);\

  2300.                     packuswb_r2r(mm7,mm1);\

  2301.                     movd_r2m(mm1,lum_m2[0]);

  2302. 

  2303. #define DEINT_LINE_LUM \

  2304.                     movd_m2r(lum_m4[0],mm0);\

  2305.                     movd_m2r(lum_m3[0],mm1);\

  2306.                     movd_m2r(lum_m2[0],mm2);\

  2307.                     movd_m2r(lum_m1[0],mm3);\

  2308.                     movd_m2r(lum[0],mm4);\

  2309.                     punpcklbw_r2r(mm7,mm0);\

  2310.                     punpcklbw_r2r(mm7,mm1);\

  2311.                     punpcklbw_r2r(mm7,mm2);\

  2312.                     punpcklbw_r2r(mm7,mm3);\

  2313.                     punpcklbw_r2r(mm7,mm4);\

  2314.                     paddw_r2r(mm3,mm1);\

  2315.                     psllw_i2r(1,mm2);\

  2316.                     paddw_r2r(mm4,mm0);\

  2317.                     psllw_i2r(2,mm1);\

  2318.                     paddw_r2r(mm6,mm2);\

  2319.                     paddw_r2r(mm2,mm1);\

  2320.                     psubusw_r2r(mm0,mm1);\

  2321.                     psrlw_i2r(3,mm1);\

  2322.                     packuswb_r2r(mm7,mm1);\

  2323.                     movd_r2m(mm1,dst[0]);

  2324. #endif

  2325. 

  2326. /* filter parameters: [-1 4 2 4 -1] // 8 */

  2327. static void deinterlace_line(uint8_t *dst,

  2328.                              const uint8_t *lum_m4, const uint8_t *lum_m3,

  2329.                              const uint8_t *lum_m2, const uint8_t *lum_m1,

  2330.                              const uint8_t *lum,

  2331.                              int size)

  2332. {

  2333. #ifndef HAVE_MMX

  2334.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2335.     int sum;

  2336. 

  2337.     for(;size > 0;size--) {

  2338.         sum = -lum_m4[0];

  2339.         sum += lum_m3[0] << 2;

  2340.         sum += lum_m2[0] << 1;

  2341.         sum += lum_m1[0] << 2;

  2342.         sum += -lum[0];

  2343.         dst[0] = cm[(sum + 4) >> 3];

  2344.         lum_m4++;

  2345.         lum_m3++;

  2346.         lum_m2++;

  2347.         lum_m1++;

  2348.         lum++;

  2349.         dst++;

  2350.     }

  2351. #else

  2352. 

  2353.     {

  2354.         mmx_t rounder;

  2355.         rounder.uw[0]=4;

  2356.         rounder.uw[1]=4;

  2357.         rounder.uw[2]=4;

  2358.         rounder.uw[3]=4;

  2359.         pxor_r2r(mm7,mm7);

  2360.         movq_m2r(rounder,mm6);

  2361.     }

  2362.     for (;size > 3; size-=4) {

  2363.         DEINT_LINE_LUM

  2364.         lum_m4+=4;

  2365.         lum_m3+=4;

  2366.         lum_m2+=4;

  2367.         lum_m1+=4;

  2368.         lum+=4;

  2369.         dst+=4;

  2370.     }

  2371. #endif

  2372. }

  2373. static void deinterlace_line_inplace(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,

  2374.                              int size)

  2375. {

  2376. #ifndef HAVE_MMX

  2377.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2378.     int sum;

  2379. 

  2380.     for(;size > 0;size--) {

  2381.         sum = -lum_m4[0];

  2382.         sum += lum_m3[0] << 2;

  2383.         sum += lum_m2[0] << 1;

  2384.         lum_m4[0]=lum_m2[0];

  2385.         sum += lum_m1[0] << 2;

  2386.         sum += -lum[0];

  2387.         lum_m2[0] = cm[(sum + 4) >> 3];

  2388.         lum_m4++;

  2389.         lum_m3++;

  2390.         lum_m2++;

  2391.         lum_m1++;

  2392.         lum++;

  2393.     }

  2394. #else

  2395. 

  2396.     {

  2397.         mmx_t rounder;

  2398.         rounder.uw[0]=4;

  2399.         rounder.uw[1]=4;

  2400.         rounder.uw[2]=4;

  2401.         rounder.uw[3]=4;

  2402.         pxor_r2r(mm7,mm7);

  2403.         movq_m2r(rounder,mm6);

  2404.     }

  2405.     for (;size > 3; size-=4) {

  2406.         DEINT_INPLACE_LINE_LUM

  2407.         lum_m4+=4;

  2408.         lum_m3+=4;

  2409.         lum_m2+=4;

  2410.         lum_m1+=4;

  2411.         lum+=4;

  2412.     }

  2413. #endif

  2414. }

  2415. 

  2416. /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The

  2417.    top field is copied as is, but the bottom field is deinterlaced

  2418.    against the top field. */

  2419. static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,

  2420.                                     const uint8_t *src1, int src_wrap,

  2421.                                     int width, int height)

  2422. {

  2423.     const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;

  2424.     int y;

  2425. 

  2426.     src_m2 = src1;

  2427.     src_m1 = src1;

  2428.     src_0=&src_m1[src_wrap];

  2429.     src_p1=&src_0[src_wrap];

  2430.     src_p2=&src_p1[src_wrap];

  2431.     for(y=0;y<(height-2);y+=2) {

  2432.         memcpy(dst,src_m1,width);

  2433.         dst += dst_wrap;

  2434.         deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);

  2435.         src_m2 = src_0;

  2436.         src_m1 = src_p1;

  2437.         src_0 = src_p2;

  2438.         src_p1 += 2*src_wrap;

  2439.         src_p2 += 2*src_wrap;

  2440.         dst += dst_wrap;

  2441.     }

  2442.     memcpy(dst,src_m1,width);

  2443.     dst += dst_wrap;

  2444.     /* do last line */

  2445.     deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);

  2446. }

  2447. 

  2448. static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,

  2449.                                              int width, int height)

  2450. {

  2451.     uint8_t *src_m1, *src_0, *src_p1, *src_p2;

  2452.     int y;

  2453.     uint8_t *buf;

  2454.     buf = (uint8_t*)av_malloc(width);

  2455. 

  2456.     src_m1 = src1;

  2457.     memcpy(buf,src_m1,width);

  2458.     src_0=&src_m1[src_wrap];

  2459.     src_p1=&src_0[src_wrap];

  2460.     src_p2=&src_p1[src_wrap];

  2461.     for(y=0;y<(height-2);y+=2) {

  2462.         deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);

  2463.         src_m1 = src_p1;

  2464.         src_0 = src_p2;

  2465.         src_p1 += 2*src_wrap;

  2466.         src_p2 += 2*src_wrap;

  2467.     }

  2468.     /* do last line */

  2469.     deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);

  2470.     av_free(buf);

  2471. }

  2472. 

  2473. 

  2474. /* deinterlace - if not supported return -1 */

  2475. int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,

  2476.                           int pix_fmt, int width, int height)

  2477. {

  2478.     int i;

  2479. 

  2480.     if (pix_fmt != PIX_FMT_YUV420P &&

  2481.         pix_fmt != PIX_FMT_YUV422P &&

  2482.         pix_fmt != PIX_FMT_YUV444P &&

  2483.         pix_fmt != PIX_FMT_YUV411P)

  2484.         return -1;

  2485.     if ((width & 3) != 0 || (height & 3) != 0)

  2486.         return -1;

  2487. 

  2488.     for(i=0;i<3;i++) {

  2489.         if (i == 1) {

  2490.             switch(pix_fmt) {

  2491.             case PIX_FMT_YUV420P:

  2492.                 width >>= 1;

  2493.                 height >>= 1;

  2494.                 break;

  2495.             case PIX_FMT_YUV422P:

  2496.                 width >>= 1;

  2497.                 break;

  2498.             case PIX_FMT_YUV411P:

  2499.                 width >>= 2;

  2500.                 break;

  2501.             default:

  2502.                 break;

  2503.             }

  2504.         }

  2505.         if (src == dst) {

  2506.             deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],

  2507.                                  width, height);

  2508.         } else {

  2509.             deinterlace_bottom_field(dst->data[i],dst->linesize[i],

  2510.                                         src->data[i], src->linesize[i],

  2511.                                         width, height);

  2512.         }

  2513.     }

  2514. #ifdef HAVE_MMX

  2515.     emms();

  2516. #endif

  2517.     return 0;

  2518. }

  2519. 

  2520. #undef FIX