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FFmpeg/libavcodec/imgconvert.c

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  1. /*

  2.  * Misc image convertion routines

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

  4.  *

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

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

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

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

  9.  *

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

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

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

  13.  * Lesser General Public License for more details.

  14.  *

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

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

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

  18.  */

  19. 

  20. /**

  21.  * @file imgconvert.c

  22.  * Misc image convertion routines.

  23.  */

  24. 

  25. /* TODO:

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

  27.  * - move all api to slice based system

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

  29.  */

  30. 

  31. #include "avcodec.h"

  32. #include "dsputil.h"

  33. 

  34. #ifdef USE_FASTMEMCPY

  35. #include "fastmemcpy.h"

  36. #endif

  37. 

  38. #ifdef HAVE_MMX

  39. #include "i386/mmx.h"

  40. #endif

  41. 

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

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

  44. 

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

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

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

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

  49. 

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

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

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

  53. 

  54. typedef struct PixFmtInfo {

  55.     const char *name;

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

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

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

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

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

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

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

  63. } PixFmtInfo;

  64. 

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

  66. static PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {

  67.     /* YUV formats */

  68.     [PIX_FMT_YUV420P] = {

  69.         .name = "yuv420p",

  70.         .nb_channels = 3,

  71.         .color_type = FF_COLOR_YUV,

  72.         .pixel_type = FF_PIXEL_PLANAR,

  73.         .depth = 8,

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

  75.     },

  76.     [PIX_FMT_YUV422P] = {

  77.         .name = "yuv422p",

  78.         .nb_channels = 3,

  79.         .color_type = FF_COLOR_YUV,

  80.         .pixel_type = FF_PIXEL_PLANAR,

  81.         .depth = 8,

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

  83.     },

  84.     [PIX_FMT_YUV444P] = {

  85.         .name = "yuv444p",

  86.         .nb_channels = 3,

  87.         .color_type = FF_COLOR_YUV,

  88.         .pixel_type = FF_PIXEL_PLANAR,

  89.         .depth = 8,

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

  91.     },

  92.     [PIX_FMT_YUV422] = {

  93.         .name = "yuv422",

  94.         .nb_channels = 1,

  95.         .color_type = FF_COLOR_YUV,

  96.         .pixel_type = FF_PIXEL_PACKED,

  97.         .depth = 8,

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

  99.     },

  100.     [PIX_FMT_YUV410P] = {

  101.         .name = "yuv410p",

  102.         .nb_channels = 3,

  103.         .color_type = FF_COLOR_YUV,

  104.         .pixel_type = FF_PIXEL_PLANAR,

  105.         .depth = 8,

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

  107.     },

  108.     [PIX_FMT_YUV411P] = {

  109.         .name = "yuv411p",

  110.         .nb_channels = 3,

  111.         .color_type = FF_COLOR_YUV,

  112.         .pixel_type = FF_PIXEL_PLANAR,

  113.         .depth = 8,

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

  115.     },

  116. 

  117.     /* JPEG YUV */

  118.     [PIX_FMT_YUVJ420P] = {

  119.         .name = "yuvj420p",

  120.         .nb_channels = 3,

  121.         .color_type = FF_COLOR_YUV_JPEG,

  122.         .pixel_type = FF_PIXEL_PLANAR,

  123.         .depth = 8,

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

  125.     },

  126.     [PIX_FMT_YUVJ422P] = {

  127.         .name = "yuvj422p",

  128.         .nb_channels = 3,

  129.         .color_type = FF_COLOR_YUV_JPEG,

  130.         .pixel_type = FF_PIXEL_PLANAR,

  131.         .depth = 8,

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

  133.     },

  134.     [PIX_FMT_YUVJ444P] = {

  135.         .name = "yuvj444p",

  136.         .nb_channels = 3,

  137.         .color_type = FF_COLOR_YUV_JPEG,

  138.         .pixel_type = FF_PIXEL_PLANAR,

  139.         .depth = 8,

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

  141.     },

  142. 

  143.     /* RGB formats */

  144.     [PIX_FMT_RGB24] = {

  145.         .name = "rgb24",

  146.         .nb_channels = 3,

  147.         .color_type = FF_COLOR_RGB,

  148.         .pixel_type = FF_PIXEL_PACKED,

  149.         .depth = 8,

  150.     },

  151.     [PIX_FMT_BGR24] = {

  152.         .name = "bgr24",

  153.         .nb_channels = 3,

  154.         .color_type = FF_COLOR_RGB,

  155.         .pixel_type = FF_PIXEL_PACKED,

  156.         .depth = 8,

  157.     },

  158.     [PIX_FMT_RGBA32] = {

  159.         .name = "rgba32",

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

  161.         .color_type = FF_COLOR_RGB,

  162.         .pixel_type = FF_PIXEL_PACKED,

  163.         .depth = 8,

  164.     },

  165.     [PIX_FMT_RGB565] = {

  166.         .name = "rgb565",

  167.         .nb_channels = 3,

  168.         .color_type = FF_COLOR_RGB,

  169.         .pixel_type = FF_PIXEL_PACKED,

  170.         .depth = 5,

  171.     },

  172.     [PIX_FMT_RGB555] = {

  173.         .name = "rgb555",

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

  175.         .color_type = FF_COLOR_RGB,

  176.         .pixel_type = FF_PIXEL_PACKED,

  177.         .depth = 5,

  178.     },

  179. 

  180.     /* gray / mono formats */

  181.     [PIX_FMT_GRAY8] = {

  182.         .name = "gray",

  183.         .nb_channels = 1,

  184.         .color_type = FF_COLOR_GRAY,

  185.         .pixel_type = FF_PIXEL_PLANAR,

  186.         .depth = 8,

  187.     },

  188.     [PIX_FMT_MONOWHITE] = {

  189.         .name = "monow",

  190.         .nb_channels = 1,

  191.         .color_type = FF_COLOR_GRAY,

  192.         .pixel_type = FF_PIXEL_PLANAR,

  193.         .depth = 1,

  194.     },

  195.     [PIX_FMT_MONOBLACK] = {

  196.         .name = "monob",

  197.         .nb_channels = 1,

  198.         .color_type = FF_COLOR_GRAY,

  199.         .pixel_type = FF_PIXEL_PLANAR,

  200.         .depth = 1,

  201.     },

  202. 

  203.     /* paletted formats */

  204.     [PIX_FMT_PAL8] = {

  205.         .name = "pal8",

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

  207.         .color_type = FF_COLOR_RGB,

  208.         .pixel_type = FF_PIXEL_PALETTE,

  209.         .depth = 8,

  210.     },

  211. };

  212. 

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

  214. {

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

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

  217. }

  218. 

  219. const char *avcodec_get_pix_fmt_name(int pix_fmt)

  220. {

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

  222.         return "???";

  223.     else

  224.         return pix_fmt_info[pix_fmt].name;

  225. }

  226. 

  227. enum PixelFormat avcodec_get_pix_fmt(const char* name)

  228. {

  229.     int i; 

  230.     

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

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

  233. 	     break;

  234.     return i;

  235. }

  236. 

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

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

  239.                    int pix_fmt, int width, int height)

  240. {

  241.     int size, w2, h2, size2;

  242.     PixFmtInfo *pinfo;

  243.     

  244.     pinfo = &pix_fmt_info[pix_fmt];

  245.     size = width * height;

  246.     switch(pix_fmt) {

  247.     case PIX_FMT_YUV420P:

  248.     case PIX_FMT_YUV422P:

  249.     case PIX_FMT_YUV444P:

  250.     case PIX_FMT_YUV410P:

  251.     case PIX_FMT_YUV411P:

  252.     case PIX_FMT_YUVJ420P:

  253.     case PIX_FMT_YUVJ422P:

  254.     case PIX_FMT_YUVJ444P:

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

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

  257.         size2 = w2 * h2;

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

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

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

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

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

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

  264.         return size + 2 * size2;

  265.     case PIX_FMT_RGB24:

  266.     case PIX_FMT_BGR24:

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

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

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

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

  271.         return size * 3;

  272.     case PIX_FMT_RGBA32:

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

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

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

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

  277.         return size * 4;

  278.     case PIX_FMT_RGB555:

  279.     case PIX_FMT_RGB565:

  280.     case PIX_FMT_YUV422:

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

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

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

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

  285.         return size * 2;

  286.     case PIX_FMT_GRAY8:

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

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

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

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

  291.         return size;

  292.     case PIX_FMT_MONOWHITE:

  293.     case PIX_FMT_MONOBLACK:

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

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

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

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

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

  299.     case PIX_FMT_PAL8:

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

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

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

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

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

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

  306.         return size2 + 256 * 4;

  307.     default:

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

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

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

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

  312.         return -1;

  313.     }

  314. }

  315. 

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

  317.                      unsigned char *dest, int dest_size)

  318. {

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

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

  321.     unsigned char* s; 

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

  323. 

  324.     if (size > dest_size)

  325.         return -1;

  326. 

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

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

  329. 	    pix_fmt == PIX_FMT_RGB555)

  330. 	  w = width * 2;

  331. 	else if (pix_fmt == PIX_FMT_PAL8)

  332. 	  w = width;

  333. 	else

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

  335. 	  

  336. 	data_planes = 1;

  337. 	h = height;

  338.     } else {

  339.         data_planes = pf->nb_channels;

  340. 	w = width;

  341. 	h = height;

  342.     }

  343.     

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

  345.          if (i == 1) {

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

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

  348. 	 }

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

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

  351. 	     memcpy(dest, s, w);

  352. 	     dest += w;

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

  354. 	 }

  355.     }

  356.     

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

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

  359.     

  360.     return size;

  361. }

  362. 

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

  364. {

  365.     AVPicture dummy_pict;

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

  367. }

  368. 

  369. /**

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

  371.  */

  372. int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,

  373.                              int has_alpha)

  374. {

  375.     const PixFmtInfo *pf, *ps;

  376.     int loss;

  377. 

  378.     ps = &pix_fmt_info[src_pix_fmt];

  379.     pf = &pix_fmt_info[dst_pix_fmt];

  380. 

  381.     /* compute loss */

  382.     loss = 0;

  383.     pf = &pix_fmt_info[dst_pix_fmt];

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

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

  386.         loss |= FF_LOSS_DEPTH;

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

  388.         pf->y_chroma_shift > ps->y_chroma_shift)

  389.         loss |= FF_LOSS_RESOLUTION;

  390.     switch(pf->color_type) {

  391.     case FF_COLOR_RGB:

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

  393.             ps->color_type != FF_COLOR_GRAY)

  394.             loss |= FF_LOSS_COLORSPACE;

  395.         break;

  396.     case FF_COLOR_GRAY:

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

  398.             loss |= FF_LOSS_COLORSPACE;

  399.         break;

  400.     case FF_COLOR_YUV:

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

  402.             loss |= FF_LOSS_COLORSPACE;

  403.         break;

  404.     case FF_COLOR_YUV_JPEG:

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

  406.             ps->color_type != FF_COLOR_YUV && 

  407.             ps->color_type != FF_COLOR_GRAY)

  408.             loss |= FF_LOSS_COLORSPACE;

  409.         break;

  410.     default:

  411.         /* fail safe test */

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

  413.             loss |= FF_LOSS_COLORSPACE;

  414.         break;

  415.     }

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

  417.         ps->color_type != FF_COLOR_GRAY)

  418.         loss |= FF_LOSS_CHROMA;

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

  420.         loss |= FF_LOSS_ALPHA;

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

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

  423.         loss |= FF_LOSS_COLORQUANT;

  424.     return loss;

  425. }

  426. 

  427. static int avg_bits_per_pixel(int pix_fmt)

  428. {

  429.     int bits;

  430.     const PixFmtInfo *pf;

  431. 

  432.     pf = &pix_fmt_info[pix_fmt];

  433.     switch(pf->pixel_type) {

  434.     case FF_PIXEL_PACKED:

  435.         switch(pix_fmt) {

  436.         case PIX_FMT_YUV422:

  437.         case PIX_FMT_RGB565:

  438.         case PIX_FMT_RGB555:

  439.             bits = 16;

  440.             break;

  441.         default:

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

  443.             break;

  444.         }

  445.         break;

  446.     case FF_PIXEL_PLANAR:

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

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

  449.         } else {

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

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

  452.         }

  453.         break;

  454.     case FF_PIXEL_PALETTE:

  455.         bits = 8;

  456.         break;

  457.     default:

  458.         bits = -1;

  459.         break;

  460.     }

  461.     return bits;

  462. }

  463. 

  464. static int avcodec_find_best_pix_fmt1(int pix_fmt_mask, 

  465.                                       int src_pix_fmt,

  466.                                       int has_alpha,

  467.                                       int loss_mask)

  468. {

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

  470. 

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

  472.     dst_pix_fmt = -1;

  473.     min_dist = 0x7fffffff;

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

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

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

  477.             if (loss == 0) {

  478.                 dist = avg_bits_per_pixel(i);

  479.                 if (dist < min_dist) {

  480.                     min_dist = dist;

  481.                     dst_pix_fmt = i;

  482.                 }

  483.             }

  484.         }

  485.     }

  486.     return dst_pix_fmt;

  487. }

  488. 

  489. /** 

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

  491.  */

  492. int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,

  493.                               int has_alpha, int *loss_ptr)

  494. {

  495.     int dst_pix_fmt, loss_mask, i;

  496.     static const int loss_mask_order[] = {

  497.         ~0, /* no loss first */

  498.         ~FF_LOSS_ALPHA,

  499.         ~FF_LOSS_RESOLUTION,

  500.         ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),

  501.         ~FF_LOSS_COLORQUANT,

  502.         ~FF_LOSS_DEPTH,

  503.         0,

  504.     };

  505. 

  506.     /* try with successive loss */

  507.     i = 0;

  508.     for(;;) {

  509.         loss_mask = loss_mask_order[i++];

  510.         dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt, 

  511.                                                  has_alpha, loss_mask);

  512.         if (dst_pix_fmt >= 0)

  513.             goto found;

  514.         if (loss_mask == 0)

  515.             break;

  516.     }

  517.     return -1;

  518.  found:

  519.     if (loss_ptr)

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

  521.     return dst_pix_fmt;

  522. }

  523. 

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

  525.                            const uint8_t *src, int src_wrap,

  526.                            int width, int height)

  527. {

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

  529.         memcpy(dst, src, width);

  530.         dst += dst_wrap;

  531.         src += src_wrap;

  532.     }

  533. }

  534. 

  535. /**

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

  537.  */

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

  539.               int pix_fmt, int width, int height)

  540. {

  541.     int bwidth, bits, i;

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

  543.     

  544.     pf = &pix_fmt_info[pix_fmt];

  545.     switch(pf->pixel_type) {

  546.     case FF_PIXEL_PACKED:

  547.         switch(pix_fmt) {

  548.         case PIX_FMT_YUV422:

  549.         case PIX_FMT_RGB565:

  550.         case PIX_FMT_RGB555:

  551.             bits = 16;

  552.             break;

  553.         default:

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

  555.             break;

  556.         }

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

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

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

  560.                        bwidth, height);

  561.         break;

  562.     case FF_PIXEL_PLANAR:

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

  564.             int w, h;

  565.             w = width;

  566.             h = height;

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

  568.                 w >>= pf->x_chroma_shift;

  569.                 h >>= pf->y_chroma_shift;

  570.             }

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

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

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

  574.                            bwidth, h);

  575.         }

  576.         break;

  577.     case FF_PIXEL_PALETTE:

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

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

  580.                        width, height);

  581.         /* copy the palette */

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

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

  584.                        4, 256);

  585.         break;

  586.     }

  587. }

  588. 

  589. /* XXX: totally non optimized */

  590. 

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

  592.                               int width, int height)

  593. {

  594.     const uint8_t *p, *p1;

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

  596.     int x;

  597.  

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

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

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

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

  602. 

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

  604.         p = p1;

  605.         lum = lum1;

  606.         cb = cb1;

  607.         cr = cr1;

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

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

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

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

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

  613.             p += 4;

  614.             lum += 2;

  615.             cb++;

  616.             cr++;

  617.         }

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

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

  620.         p = p1;

  621.         lum = lum1;

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

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

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

  625.             p += 4;

  626.             lum += 2;

  627.         }

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

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

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

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

  632.     }

  633. }

  634. 

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

  636.                               int width, int height)

  637. {

  638.     const uint8_t *p, *p1;

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

  640.     int w;

  641. 

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

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

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

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

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

  647.         p = p1;

  648.         lum = lum1;

  649.         cb = cb1;

  650.         cr = cr1;

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

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

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

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

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

  656.             p += 4;

  657.             lum += 2;

  658.             cb++;

  659.             cr++;

  660.         }

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

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

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

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

  665.     }

  666. }

  667. 

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

  669.                               int width, int height)

  670. {

  671.     uint8_t *p, *p1;

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

  673.     int w;

  674. 

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

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

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

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

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

  680.         p = p1;

  681.         lum = lum1;

  682.         cb = cb1;

  683.         cr = cr1;

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

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

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

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

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

  689.             p += 4;

  690.             lum += 2;

  691.             cb++;

  692.             cr++;

  693.         }

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

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

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

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

  698.     }

  699. }

  700. 

  701. #define SCALEBITS 10

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

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

  704. 

  705. #define YUV_TO_RGB1_CCIR(cb1, cr1)\

  706. {\

  707.     cb = (cb1) - 128;\

  708.     cr = (cr1) - 128;\

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

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

  711.             ONE_HALF;\

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

  713. }

  714. 

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

  716. {\

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

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

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

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

  721. }

  722. 

  723. #define YUV_TO_RGB1(cb1, cr1)\

  724. {\

  725.     cb = (cb1) - 128;\

  726.     cr = (cr1) - 128;\

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

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

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

  730. }

  731. 

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

  733. {\

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

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

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

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

  738. }

  739. 

  740. #define Y_CCIR_TO_JPEG(y)\

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

  742. 

  743. #define Y_JPEG_TO_CCIR(y)\

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

  745. 

  746. #define C_CCIR_TO_JPEG(y)\

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

  748. 

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

  750. #define C_JPEG_TO_CCIR(y)\

  751. ({\

  752.     int __y;\

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

  754.     if (__y < 16)\

  755.          __y = 16;\

  756.     __y;\

  757. })

  758. 

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

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

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

  762. 

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

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

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

  766. 

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

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

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

  770. 

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

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

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

  774. 

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

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

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

  778. 

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

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

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

  782. 

  783. static uint8_t y_ccir_to_jpeg[256];

  784. static uint8_t y_jpeg_to_ccir[256];

  785. static uint8_t c_ccir_to_jpeg[256];

  786. static uint8_t c_jpeg_to_ccir[256];

  787. 

  788. /* init various conversion tables */

  789. static void img_convert_init(void)

  790. {

  791.     int i;

  792.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  793. 

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

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

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

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

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

  799.     }

  800. }

  801. 

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

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

  804.                             const uint8_t *src, int src_wrap,

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

  806. {

  807.     int n;

  808.     const uint8_t *s;

  809.     uint8_t *d;

  810.     const uint8_t *table;

  811. 

  812.     table = table1;

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

  814.         s = src;

  815.         d = dst;

  816.         n = width;

  817.         while (n >= 4) {

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

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

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

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

  822.             d += 4;

  823.             s += 4;

  824.             n -= 4;

  825.         }

  826.         while (n > 0) {

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

  828.             d++;

  829.             s++;

  830.             n--;

  831.         }

  832.         dst += dst_wrap;

  833.         src += src_wrap;

  834.     }

  835. }

  836. 

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

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

  839. 

  840. /* 4x1 -> 1x1 */

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

  842.                      const uint8_t *src, int src_wrap,

  843.                      int width, int height)

  844. {

  845.     int w;

  846.     const uint8_t *s;

  847.     uint8_t *d;

  848. 

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

  850.         s = src;

  851.         d = dst;

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

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

  854.             s += 4;

  855.             d++;

  856.         }

  857.         src += src_wrap;

  858.         dst += dst_wrap;

  859.     }

  860. }

  861. 

  862. /* 2x1 -> 1x1 */

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

  864.                      const uint8_t *src, int src_wrap,

  865.                      int width, int height)

  866. {

  867.     int w;

  868.     const uint8_t *s;

  869.     uint8_t *d;

  870. 

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

  872.         s = src;

  873.         d = dst;

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

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

  876.             s += 2;

  877.             d++;

  878.         }

  879.         src += src_wrap;

  880.         dst += dst_wrap;

  881.     }

  882. }

  883. 

  884. /* 1x2 -> 1x1 */

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

  886.                      const uint8_t *src, int src_wrap,

  887.                      int width, int height)

  888. {

  889.     int w;

  890.     uint8_t *d;

  891.     const uint8_t *s1, *s2;

  892. 

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

  894.         s1 = src;

  895.         s2 = s1 + src_wrap;

  896.         d = dst;

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

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

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

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

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

  902.             s1 += 4;

  903.             s2 += 4;

  904.             d += 4;

  905.         }

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

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

  908.             s1++;

  909.             s2++;

  910.             d++;

  911.         }

  912.         src += 2 * src_wrap;

  913.         dst += dst_wrap;

  914.     }

  915. }

  916. 

  917. /* 2x2 -> 1x1 */

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

  919.                      const uint8_t *src, int src_wrap,

  920.                      int width, int height)

  921. {

  922.     int w;

  923.     const uint8_t *s1, *s2;

  924.     uint8_t *d;

  925. 

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

  927.         s1 = src;

  928.         s2 = s1 + src_wrap;

  929.         d = dst;

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

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

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

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

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

  935.             s1 += 8;

  936.             s2 += 8;

  937.             d += 4;

  938.         }

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

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

  941.             s1 += 2;

  942.             s2 += 2;

  943.             d++;

  944.         }

  945.         src += 2 * src_wrap;

  946.         dst += dst_wrap;

  947.     }

  948. }

  949. 

  950. /* 4x4 -> 1x1 */

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

  952.                      const uint8_t *src, int src_wrap,

  953.                      int width, int height)

  954. {

  955.     int w;

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

  957.     uint8_t *d;

  958. 

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

  960.         s1 = src;

  961.         s2 = s1 + src_wrap;

  962.         s3 = s2 + src_wrap;

  963.         s4 = s3 + src_wrap;

  964.         d = dst;

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

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

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

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

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

  970.             s1 += 4;

  971.             s2 += 4;

  972.             s3 += 4;

  973.             s4 += 4;

  974.             d++;

  975.         }

  976.         src += 4 * src_wrap;

  977.         dst += dst_wrap;

  978.     }

  979. }

  980. 

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

  982.                         int width)

  983. {

  984.     int w;

  985.     const uint8_t *s1;

  986.     uint8_t *d;

  987. 

  988.     s1 = src;

  989.     d = dst;

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

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

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

  993.         s1 += 2;

  994.         d += 4;

  995.     }

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

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

  998.         s1 ++;

  999.         d += 2;

  1000.     }

  1001.     /* only needed if width is not a multiple of two */

  1002.     /* XXX: veryfy that */

  1003.     if (w) {

  1004.         d[0] = s1[0];

  1005.     }

  1006. }

  1007. 

  1008. static void grow41_line(uint8_t *dst, const uint8_t *src,

  1009.                         int width)

  1010. {

  1011.     int w, v;

  1012.     const uint8_t *s1;

  1013.     uint8_t *d;

  1014. 

  1015.     s1 = src;

  1016.     d = dst;

  1017.     for(w = width;w >= 4; w-=4) {

  1018.         v = s1[0];

  1019.         d[0] = v;

  1020.         d[1] = v;

  1021.         d[2] = v;

  1022.         d[3] = v;

  1023.         s1 ++;

  1024.         d += 4;

  1025.     }

  1026. }

  1027. 

  1028. /* 1x1 -> 2x1 */

  1029. static void grow21(uint8_t *dst, int dst_wrap,

  1030.                    const uint8_t *src, int src_wrap,

  1031.                    int width, int height)

  1032. {

  1033.     for(;height > 0; height--) {

  1034.         grow21_line(dst, src, width);

  1035.         src += src_wrap;

  1036.         dst += dst_wrap;

  1037.     }

  1038. }

  1039. 

  1040. /* 1x1 -> 2x2 */

  1041. static void grow22(uint8_t *dst, int dst_wrap,

  1042.                    const uint8_t *src, int src_wrap,

  1043.                    int width, int height)

  1044. {

  1045.     for(;height > 0; height--) {

  1046.         grow21_line(dst, src, width);

  1047.         if (height%2)

  1048.             src += src_wrap;

  1049.         dst += dst_wrap;

  1050.     }

  1051. }

  1052. 

  1053. /* 1x1 -> 4x1 */

  1054. static void grow41(uint8_t *dst, int dst_wrap,

  1055.                    const uint8_t *src, int src_wrap,

  1056.                    int width, int height)

  1057. {

  1058.     for(;height > 0; height--) {

  1059.         grow41_line(dst, src, width);

  1060.         src += src_wrap;

  1061.         dst += dst_wrap;

  1062.     }

  1063. }

  1064. 

  1065. /* 1x1 -> 4x4 */

  1066. static void grow44(uint8_t *dst, int dst_wrap,

  1067.                    const uint8_t *src, int src_wrap,

  1068.                    int width, int height)

  1069. {

  1070.     for(;height > 0; height--) {

  1071.         grow41_line(dst, src, width);

  1072.         if ((height & 3) == 1)

  1073.             src += src_wrap;

  1074.         dst += dst_wrap;

  1075.     }

  1076. }

  1077. 

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

  1079. static void conv411(uint8_t *dst, int dst_wrap, 

  1080.                     const uint8_t *src, int src_wrap,

  1081.                     int width, int height)

  1082. {

  1083.     int w, c;

  1084.     const uint8_t *s1, *s2;

  1085.     uint8_t *d;

  1086. 

  1087.     width>>=1;

  1088. 

  1089.     for(;height > 0; height--) {

  1090.         s1 = src;

  1091.         s2 = src + src_wrap;

  1092.         d = dst;

  1093.         for(w = width;w > 0; w--) {

  1094.             c = (s1[0] + s2[0]) >> 1;

  1095.             d[0] = c;

  1096.             d[1] = c;

  1097.             s1++;

  1098.             s2++;

  1099.             d += 2;

  1100.         }

  1101.         src += src_wrap * 2;

  1102.         dst += dst_wrap;

  1103.     }

  1104. }

  1105. 

  1106. /* XXX: add jpeg quantize code */

  1107. 

  1108. #define TRANSP_INDEX (6*6*6)

  1109. 

  1110. /* this is maybe slow, but allows for extensions */

  1111. static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)

  1112. {

  1113.     return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));

  1114. }

  1115. 

  1116. static void build_rgb_palette(uint8_t *palette, int has_alpha)

  1117. {

  1118.     uint32_t *pal;

  1119.     static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };

  1120.     int i, r, g, b;

  1121. 

  1122.     pal = (uint32_t *)palette;

  1123.     i = 0;

  1124.     for(r = 0; r < 6; r++) {

  1125.         for(g = 0; g < 6; g++) {

  1126.             for(b = 0; b < 6; b++) {

  1127.                 pal[i++] = (0xff << 24) | (pal_value[r] << 16) | 

  1128.                     (pal_value[g] << 8) | pal_value[b];

  1129.             }

  1130.         }

  1131.     }

  1132.     if (has_alpha)

  1133.         pal[i++] = 0;

  1134.     while (i < 256)

  1135.         pal[i++] = 0xff000000;

  1136. }

  1137. 

  1138. /* copy bit n to bits 0 ... n - 1 */

  1139. static inline unsigned int bitcopy_n(unsigned int a, int n)

  1140. {

  1141.     int mask;

  1142.     mask = (1 << n) - 1;

  1143.     return (a & (0xff & ~mask)) | ((-((a >> n) & 1)) & mask);

  1144. }

  1145. 

  1146. /* rgb555 handling */

  1147. 

  1148. #define RGB_NAME rgb555

  1149. 

  1150. #define RGB_IN(r, g, b, s)\

  1151. {\

  1152.     unsigned int v = ((const uint16_t *)(s))[0];\

  1153.     r = bitcopy_n(v >> (10 - 3), 3);\

  1154.     g = bitcopy_n(v >> (5 - 3), 3);\

  1155.     b = bitcopy_n(v << 3, 3);\

  1156. }

  1157. 

  1158. #define RGBA_IN(r, g, b, a, s)\

  1159. {\

  1160.     unsigned int v = ((const uint16_t *)(s))[0];\

  1161.     r = bitcopy_n(v >> (10 - 3), 3);\

  1162.     g = bitcopy_n(v >> (5 - 3), 3);\

  1163.     b = bitcopy_n(v << 3, 3);\

  1164.     a = (-(v >> 15)) & 0xff;\

  1165. }

  1166. 

  1167. #define RGBA_OUT(d, r, g, b, a)\

  1168. {\

  1169.     ((uint16_t *)(d))[0] = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3) | \

  1170.                            ((a << 8) & 0x8000);\

  1171. }

  1172. 

  1173. #define BPP 2

  1174. 

  1175. #include "imgconvert_template.h"

  1176. 

  1177. /* rgb565 handling */

  1178. 

  1179. #define RGB_NAME rgb565

  1180. 

  1181. #define RGB_IN(r, g, b, s)\

  1182. {\

  1183.     unsigned int v = ((const uint16_t *)(s))[0];\

  1184.     r = bitcopy_n(v >> (11 - 3), 3);\

  1185.     g = bitcopy_n(v >> (5 - 2), 2);\

  1186.     b = bitcopy_n(v << 3, 3);\

  1187. }

  1188. 

  1189. #define RGB_OUT(d, r, g, b)\

  1190. {\

  1191.     ((uint16_t *)(d))[0] = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);\

  1192. }

  1193. 

  1194. #define BPP 2

  1195. 

  1196. #include "imgconvert_template.h"

  1197. 

  1198. /* bgr24 handling */

  1199. 

  1200. #define RGB_NAME bgr24

  1201. 

  1202. #define RGB_IN(r, g, b, s)\

  1203. {\

  1204.     b = (s)[0];\

  1205.     g = (s)[1];\

  1206.     r = (s)[2];\

  1207. }

  1208. 

  1209. #define RGB_OUT(d, r, g, b)\

  1210. {\

  1211.     (d)[0] = b;\

  1212.     (d)[1] = g;\

  1213.     (d)[2] = r;\

  1214. }

  1215. 

  1216. #define BPP 3

  1217. 

  1218. #include "imgconvert_template.h"

  1219. 

  1220. #undef RGB_IN

  1221. #undef RGB_OUT

  1222. #undef BPP

  1223. 

  1224. /* rgb24 handling */

  1225. 

  1226. #define RGB_NAME rgb24

  1227. #define FMT_RGB24

  1228. 

  1229. #define RGB_IN(r, g, b, s)\

  1230. {\

  1231.     r = (s)[0];\

  1232.     g = (s)[1];\

  1233.     b = (s)[2];\

  1234. }

  1235. 

  1236. #define RGB_OUT(d, r, g, b)\

  1237. {\

  1238.     (d)[0] = r;\

  1239.     (d)[1] = g;\

  1240.     (d)[2] = b;\

  1241. }

  1242. 

  1243. #define BPP 3

  1244. 

  1245. #include "imgconvert_template.h"

  1246. 

  1247. /* rgba32 handling */

  1248. 

  1249. #define RGB_NAME rgba32

  1250. #define FMT_RGBA32

  1251. 

  1252. #define RGB_IN(r, g, b, s)\

  1253. {\

  1254.     unsigned int v = ((const uint32_t *)(s))[0];\

  1255.     r = (v >> 16) & 0xff;\

  1256.     g = (v >> 8) & 0xff;\

  1257.     b = v & 0xff;\

  1258. }

  1259. 

  1260. #define RGBA_IN(r, g, b, a, s)\

  1261. {\

  1262.     unsigned int v = ((const uint32_t *)(s))[0];\

  1263.     a = (v >> 24) & 0xff;\

  1264.     r = (v >> 16) & 0xff;\

  1265.     g = (v >> 8) & 0xff;\

  1266.     b = v & 0xff;\

  1267. }

  1268. 

  1269. #define RGBA_OUT(d, r, g, b, a)\

  1270. {\

  1271.     ((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;\

  1272. }

  1273. 

  1274. #define BPP 4

  1275. 

  1276. #include "imgconvert_template.h"

  1277. 

  1278. static void mono_to_gray(AVPicture *dst, AVPicture *src,

  1279.                          int width, int height, int xor_mask)

  1280. {

  1281.     const unsigned char *p;

  1282.     unsigned char *q;

  1283.     int v, dst_wrap, src_wrap;

  1284.     int y, w;

  1285. 

  1286.     p = src->data[0];

  1287.     src_wrap = src->linesize[0] - ((width + 7) >> 3);

  1288. 

  1289.     q = dst->data[0];

  1290.     dst_wrap = dst->linesize[0] - width;

  1291.     for(y=0;y<height;y++) {

  1292.         w = width; 

  1293.         while (w >= 8) {

  1294.             v = *p++ ^ xor_mask;

  1295.             q[0] = -(v >> 7);

  1296.             q[1] = -((v >> 6) & 1);

  1297.             q[2] = -((v >> 5) & 1);

  1298.             q[3] = -((v >> 4) & 1);

  1299.             q[4] = -((v >> 3) & 1);

  1300.             q[5] = -((v >> 2) & 1);

  1301.             q[6] = -((v >> 1) & 1);

  1302.             q[7] = -((v >> 0) & 1);

  1303.             w -= 8;

  1304.             q += 8;

  1305.         }

  1306.         if (w > 0) {

  1307.             v = *p++ ^ xor_mask;

  1308.             do {

  1309.                 q[0] = -((v >> 7) & 1);

  1310.                 q++;

  1311.                 v <<= 1;

  1312.             } while (--w);

  1313.         }

  1314.         p += src_wrap;

  1315.         q += dst_wrap;

  1316.     }

  1317. }

  1318. 

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

  1320.                                int width, int height)

  1321. {

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

  1323. }

  1324. 

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

  1326.                                int width, int height)

  1327. {

  1328.     mono_to_gray(dst, src, width, height, 0x00);

  1329. }

  1330. 

  1331. static void gray_to_mono(AVPicture *dst, AVPicture *src,

  1332.                          int width, int height, int xor_mask)

  1333. {

  1334.     int n;

  1335.     const uint8_t *s;

  1336.     uint8_t *d;

  1337.     int j, b, v, n1, src_wrap, dst_wrap, y;

  1338. 

  1339.     s = src->data[0];

  1340.     src_wrap = src->linesize[0] - width;

  1341. 

  1342.     d = dst->data[0];

  1343.     dst_wrap = dst->linesize[0] - ((width + 7) >> 3);

  1344. 

  1345.     for(y=0;y<height;y++) {

  1346.         n = width;

  1347.         while (n >= 8) {

  1348.             v = 0;

  1349.             for(j=0;j<8;j++) {

  1350.                 b = s[0];

  1351.                 s++;

  1352.                 v = (v << 1) | (b >> 7);

  1353.             }

  1354.             d[0] = v ^ xor_mask;

  1355.             d++;

  1356.             n -= 8;

  1357.         }

  1358.         if (n > 0) {

  1359.             n1 = n;

  1360.             v = 0;

  1361.             while (n > 0) {

  1362.                 b = s[0];

  1363.                 s++;

  1364.                 v = (v << 1) | (b >> 7);

  1365.                 n--;

  1366.             }

  1367.             d[0] = (v << (8 - (n1 & 7))) ^ xor_mask;

  1368.             d++;

  1369.         }

  1370.         s += src_wrap;

  1371.         d += dst_wrap;

  1372.     }

  1373. }

  1374. 

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

  1376.                               int width, int height)

  1377. {

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

  1379. }

  1380. 

  1381. static void gray_to_monoblack(AVPicture *dst, AVPicture *src,

  1382.                               int width, int height)

  1383. {

  1384.     gray_to_mono(dst, src, width, height, 0x00);

  1385. }

  1386. 

  1387. typedef struct ConvertEntry {

  1388.     void (*convert)(AVPicture *dst, AVPicture *src, int width, int height);

  1389. } ConvertEntry;

  1390. 

  1391. /* Add each new convertion function in this table. In order to be able

  1392.    to convert from any format to any format, the following constraints

  1393.    must be satisfied:

  1394. 

  1395.    - all FF_COLOR_RGB formats must convert to and from PIX_FMT_RGB24 

  1396. 

  1397.    - all FF_COLOR_GRAY formats must convert to and from PIX_FMT_GRAY8

  1398. 

  1399.    - all FF_COLOR_RGB formats with alpha must convert to and from PIX_FMT_RGBA32

  1400. 

  1401.    - PIX_FMT_YUV444P and PIX_FMT_YUVJ444P must convert to and from

  1402.      PIX_FMT_RGB24.

  1403. 

  1404.    - PIX_FMT_422 must convert to and from PIX_FMT_422P.

  1405. 

  1406.    The other conversion functions are just optimisations for common cases.

  1407. */

  1408. static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {

  1409.     [PIX_FMT_YUV420P] = {

  1410.         [PIX_FMT_RGB555] = { 

  1411.             .convert = yuv420p_to_rgb555

  1412.         },

  1413.         [PIX_FMT_RGB565] = { 

  1414.             .convert = yuv420p_to_rgb565

  1415.         },

  1416.         [PIX_FMT_BGR24] = { 

  1417.             .convert = yuv420p_to_bgr24

  1418.         },

  1419.         [PIX_FMT_RGB24] = { 

  1420.             .convert = yuv420p_to_rgb24

  1421.         },

  1422.         [PIX_FMT_RGBA32] = { 

  1423.             .convert = yuv420p_to_rgba32

  1424.         },

  1425.     },

  1426.     [PIX_FMT_YUV422P] = { 

  1427.         [PIX_FMT_YUV422] = { 

  1428.             .convert = yuv422p_to_yuv422,

  1429.         },

  1430.     },

  1431.     [PIX_FMT_YUV444P] = { 

  1432.         [PIX_FMT_RGB24] = { 

  1433.             .convert = yuv444p_to_rgb24

  1434.         },

  1435.     },

  1436.     [PIX_FMT_YUVJ420P] = {

  1437.         [PIX_FMT_RGB555] = { 

  1438.             .convert = yuvj420p_to_rgb555

  1439.         },

  1440.         [PIX_FMT_RGB565] = { 

  1441.             .convert = yuvj420p_to_rgb565

  1442.         },

  1443.         [PIX_FMT_BGR24] = { 

  1444.             .convert = yuvj420p_to_bgr24

  1445.         },

  1446.         [PIX_FMT_RGB24] = { 

  1447.             .convert = yuvj420p_to_rgb24

  1448.         },

  1449.         [PIX_FMT_RGBA32] = { 

  1450.             .convert = yuvj420p_to_rgba32

  1451.         },

  1452.     },

  1453.     [PIX_FMT_YUVJ444P] = { 

  1454.         [PIX_FMT_RGB24] = { 

  1455.             .convert = yuvj444p_to_rgb24

  1456.         },

  1457.     },

  1458.     [PIX_FMT_YUV422] = { 

  1459.         [PIX_FMT_YUV420P] = { 

  1460.             .convert = yuv422_to_yuv420p,

  1461.         },

  1462.         [PIX_FMT_YUV422P] = { 

  1463.             .convert = yuv422_to_yuv422p,

  1464.         },

  1465.     },

  1466. 

  1467.     [PIX_FMT_RGB24] = {

  1468.         [PIX_FMT_YUV420P] = { 

  1469.             .convert = rgb24_to_yuv420p

  1470.         },

  1471.         [PIX_FMT_RGB565] = { 

  1472.             .convert = rgb24_to_rgb565

  1473.         },

  1474.         [PIX_FMT_RGB555] = { 

  1475.             .convert = rgb24_to_rgb555

  1476.         },

  1477.         [PIX_FMT_RGBA32] = { 

  1478.             .convert = rgb24_to_rgba32

  1479.         },

  1480.         [PIX_FMT_BGR24] = { 

  1481.             .convert = rgb24_to_bgr24

  1482.         },

  1483.         [PIX_FMT_GRAY8] = { 

  1484.             .convert = rgb24_to_gray

  1485.         },

  1486.         [PIX_FMT_PAL8] = {

  1487.             .convert = rgb24_to_pal8

  1488.         },

  1489.         [PIX_FMT_YUV444P] = { 

  1490.             .convert = rgb24_to_yuv444p

  1491.         },

  1492.         [PIX_FMT_YUVJ420P] = { 

  1493.             .convert = rgb24_to_yuvj420p

  1494.         },

  1495.         [PIX_FMT_YUVJ444P] = { 

  1496.             .convert = rgb24_to_yuvj444p

  1497.         },

  1498.     },

  1499.     [PIX_FMT_RGBA32] = {

  1500.         [PIX_FMT_RGB24] = { 

  1501.             .convert = rgba32_to_rgb24

  1502.         },

  1503.         [PIX_FMT_RGB555] = { 

  1504.             .convert = rgba32_to_rgb555

  1505.         },

  1506.         [PIX_FMT_PAL8] = { 

  1507.             .convert = rgba32_to_pal8

  1508.         },

  1509.         [PIX_FMT_YUV420P] = { 

  1510.             .convert = rgba32_to_yuv420p

  1511.         },

  1512.         [PIX_FMT_GRAY8] = { 

  1513.             .convert = rgba32_to_gray

  1514.         },

  1515.     },

  1516.     [PIX_FMT_BGR24] = {

  1517.         [PIX_FMT_RGB24] = { 

  1518.             .convert = bgr24_to_rgb24

  1519.         },

  1520.         [PIX_FMT_YUV420P] = { 

  1521.             .convert = bgr24_to_yuv420p

  1522.         },

  1523.         [PIX_FMT_GRAY8] = { 

  1524.             .convert = bgr24_to_gray

  1525.         },

  1526.     },

  1527.     [PIX_FMT_RGB555] = {

  1528.         [PIX_FMT_RGB24] = { 

  1529.             .convert = rgb555_to_rgb24

  1530.         },

  1531.         [PIX_FMT_RGBA32] = { 

  1532.             .convert = rgb555_to_rgba32

  1533.         },

  1534.         [PIX_FMT_YUV420P] = { 

  1535.             .convert = rgb555_to_yuv420p

  1536.         },

  1537.         [PIX_FMT_GRAY8] = { 

  1538.             .convert = rgb555_to_gray

  1539.         },

  1540.     },

  1541.     [PIX_FMT_RGB565] = {

  1542.         [PIX_FMT_RGB24] = { 

  1543.             .convert = rgb565_to_rgb24

  1544.         },

  1545.         [PIX_FMT_YUV420P] = { 

  1546.             .convert = rgb565_to_yuv420p

  1547.         },

  1548.         [PIX_FMT_GRAY8] = { 

  1549.             .convert = rgb565_to_gray

  1550.         },

  1551.     },

  1552.     [PIX_FMT_GRAY8] = {

  1553.         [PIX_FMT_RGB555] = { 

  1554.             .convert = gray_to_rgb555

  1555.         },

  1556.         [PIX_FMT_RGB565] = { 

  1557.             .convert = gray_to_rgb565

  1558.         },

  1559.         [PIX_FMT_RGB24] = { 

  1560.             .convert = gray_to_rgb24

  1561.         },

  1562.         [PIX_FMT_BGR24] = { 

  1563.             .convert = gray_to_bgr24

  1564.         },

  1565.         [PIX_FMT_RGBA32] = { 

  1566.             .convert = gray_to_rgba32

  1567.         },

  1568.         [PIX_FMT_MONOWHITE] = { 

  1569.             .convert = gray_to_monowhite

  1570.         },

  1571.         [PIX_FMT_MONOBLACK] = { 

  1572.             .convert = gray_to_monoblack

  1573.         },

  1574.     },

  1575.     [PIX_FMT_MONOWHITE] = {

  1576.         [PIX_FMT_GRAY8] = { 

  1577.             .convert = monowhite_to_gray

  1578.         },

  1579.     },

  1580.     [PIX_FMT_MONOBLACK] = {

  1581.         [PIX_FMT_GRAY8] = { 

  1582.             .convert = monoblack_to_gray

  1583.         },

  1584.     },

  1585.     [PIX_FMT_PAL8] = {

  1586.         [PIX_FMT_RGB555] = { 

  1587.             .convert = pal8_to_rgb555

  1588.         },

  1589.         [PIX_FMT_RGB565] = { 

  1590.             .convert = pal8_to_rgb565

  1591.         },

  1592.         [PIX_FMT_BGR24] = { 

  1593.             .convert = pal8_to_bgr24

  1594.         },

  1595.         [PIX_FMT_RGB24] = { 

  1596.             .convert = pal8_to_rgb24

  1597.         },

  1598.         [PIX_FMT_RGBA32] = { 

  1599.             .convert = pal8_to_rgba32

  1600.         },

  1601.     },

  1602. };

  1603. 

  1604. static int avpicture_alloc(AVPicture *picture,

  1605.                            int pix_fmt, int width, int height)

  1606. {

  1607.     unsigned int size;

  1608.     void *ptr;

  1609. 

  1610.     size = avpicture_get_size(pix_fmt, width, height);

  1611.     if (size < 0)

  1612.         goto fail;

  1613.     ptr = av_malloc(size);

  1614.     if (!ptr)

  1615.         goto fail;

  1616.     avpicture_fill(picture, ptr, pix_fmt, width, height);

  1617.     return 0;

  1618.  fail:

  1619.     memset(picture, 0, sizeof(AVPicture));

  1620.     return -1;

  1621. }

  1622. 

  1623. static void avpicture_free(AVPicture *picture)

  1624. {

  1625.     av_free(picture->data[0]);

  1626. }

  1627. 

  1628. /* return true if yuv planar */

  1629. static inline int is_yuv_planar(PixFmtInfo *ps)

  1630. {

  1631.     return (ps->color_type == FF_COLOR_YUV ||

  1632.             ps->color_type == FF_COLOR_YUV_JPEG) && 

  1633.         ps->pixel_type == FF_PIXEL_PLANAR;

  1634. }

  1635. 

  1636. /* XXX: always use linesize. Return -1 if not supported */

  1637. int img_convert(AVPicture *dst, int dst_pix_fmt,

  1638.                 AVPicture *src, int src_pix_fmt, 

  1639.                 int src_width, int src_height)

  1640. {

  1641.     static int inited;

  1642.     int i, ret, dst_width, dst_height, int_pix_fmt;

  1643.     PixFmtInfo *src_pix, *dst_pix;

  1644.     ConvertEntry *ce;

  1645.     AVPicture tmp1, *tmp = &tmp1;

  1646. 

  1647.     if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB ||

  1648.         dst_pix_fmt < 0 || dst_pix_fmt >= PIX_FMT_NB)

  1649.         return -1;

  1650.     if (src_width <= 0 || src_height <= 0)

  1651.         return 0;

  1652. 

  1653.     if (!inited) {

  1654.         inited = 1;

  1655.         img_convert_init();

  1656.     }

  1657. 

  1658.     dst_width = src_width;

  1659.     dst_height = src_height;

  1660. 

  1661.     dst_pix = &pix_fmt_info[dst_pix_fmt];

  1662.     src_pix = &pix_fmt_info[src_pix_fmt];

  1663.     if (src_pix_fmt == dst_pix_fmt) {

  1664.         /* no conversion needed: just copy */

  1665.         img_copy(dst, src, dst_pix_fmt, dst_width, dst_height);

  1666.         return 0;

  1667.     }

  1668. 

  1669.     ce = &convert_table[src_pix_fmt][dst_pix_fmt];

  1670.     if (ce->convert) {

  1671.         /* specific convertion routine */

  1672.         ce->convert(dst, src, dst_width, dst_height);

  1673.         return 0;

  1674.     }

  1675. 

  1676.     /* gray to YUV */

  1677.     if (is_yuv_planar(dst_pix) &&

  1678.         src_pix_fmt == PIX_FMT_GRAY8) {

  1679.         int w, h, y;

  1680.         uint8_t *d;

  1681. 

  1682.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG) {

  1683.             img_copy_plane(dst->data[0], dst->linesize[0],

  1684.                      src->data[0], src->linesize[0],

  1685.                      dst_width, dst_height);

  1686.         } else {

  1687.             img_apply_table(dst->data[0], dst->linesize[0],

  1688.                             src->data[0], src->linesize[0],

  1689.                             dst_width, dst_height,

  1690.                             y_jpeg_to_ccir);

  1691.         }

  1692.         /* fill U and V with 128 */

  1693.         w = dst_width;

  1694.         h = dst_height;

  1695.         w >>= dst_pix->x_chroma_shift;

  1696.         h >>= dst_pix->y_chroma_shift;

  1697.         for(i = 1; i <= 2; i++) {

  1698.             d = dst->data[i];

  1699.             for(y = 0; y< h; y++) {

  1700.                 memset(d, 128, w);

  1701.                 d += dst->linesize[i];

  1702.             }

  1703.         }

  1704.         return 0;

  1705.     }

  1706. 

  1707.     /* YUV to gray */

  1708.     if (is_yuv_planar(src_pix) && 

  1709.         dst_pix_fmt == PIX_FMT_GRAY8) {

  1710.         if (src_pix->color_type == FF_COLOR_YUV_JPEG) {

  1711.             img_copy_plane(dst->data[0], dst->linesize[0],

  1712.                      src->data[0], src->linesize[0],

  1713.                      dst_width, dst_height);

  1714.         } else {

  1715.             img_apply_table(dst->data[0], dst->linesize[0],

  1716.                             src->data[0], src->linesize[0],

  1717.                             dst_width, dst_height,

  1718.                             y_ccir_to_jpeg);

  1719.         }

  1720.         return 0;

  1721.     }

  1722. 

  1723.     /* YUV to YUV planar */

  1724.     if (is_yuv_planar(dst_pix) && is_yuv_planar(src_pix)) {

  1725.         int x_shift, y_shift, w, h, xy_shift;

  1726.         void (*resize_func)(uint8_t *dst, int dst_wrap, 

  1727.                             const uint8_t *src, int src_wrap,

  1728.                             int width, int height);

  1729. 

  1730.         /* compute chroma size of the smallest dimensions */

  1731.         w = dst_width;

  1732.         h = dst_height;

  1733.         if (dst_pix->x_chroma_shift >= src_pix->x_chroma_shift)

  1734.             w >>= dst_pix->x_chroma_shift;

  1735.         else

  1736.             w >>= src_pix->x_chroma_shift;

  1737.         if (dst_pix->y_chroma_shift >= src_pix->y_chroma_shift)

  1738.             h >>= dst_pix->y_chroma_shift;

  1739.         else

  1740.             h >>= src_pix->y_chroma_shift;

  1741. 

  1742.         x_shift = (dst_pix->x_chroma_shift - src_pix->x_chroma_shift);

  1743.         y_shift = (dst_pix->y_chroma_shift - src_pix->y_chroma_shift);

  1744.         xy_shift = ((x_shift & 0xf) << 4) | (y_shift & 0xf);

  1745.         /* there must be filters for conversion at least from and to

  1746.            YUV444 format */

  1747.         switch(xy_shift) {

  1748.         case 0x00:

  1749.             resize_func = img_copy_plane;

  1750.             break;

  1751.         case 0x10:

  1752.             resize_func = shrink21;

  1753.             break;

  1754.         case 0x20:

  1755.             resize_func = shrink41;

  1756.             break;

  1757.         case 0x01:

  1758.             resize_func = shrink12;

  1759.             break;

  1760.         case 0x11:

  1761.             resize_func = shrink22;

  1762.             break;

  1763.         case 0x22:

  1764.             resize_func = shrink44;

  1765.             break;

  1766.         case 0xf0:

  1767.             resize_func = grow21;

  1768.             break;

  1769.         case 0xe0:

  1770.             resize_func = grow41;

  1771.             break;

  1772.         case 0xff:

  1773.             resize_func = grow22;

  1774.             break;

  1775.         case 0xee:

  1776.             resize_func = grow44;

  1777.             break;

  1778.         case 0xf1:

  1779.             resize_func = conv411;

  1780.             break;

  1781.         default:

  1782.             /* currently not handled */

  1783.             goto no_chroma_filter;

  1784.         }

  1785. 

  1786.         img_copy_plane(dst->data[0], dst->linesize[0],

  1787.                        src->data[0], src->linesize[0],

  1788.                        dst_width, dst_height);

  1789. 

  1790.         for(i = 1;i <= 2; i++)

  1791.             resize_func(dst->data[i], dst->linesize[i],

  1792.                         src->data[i], src->linesize[i],

  1793.                         dst_width>>dst_pix->x_chroma_shift, dst_height>>dst_pix->y_chroma_shift);

  1794.         /* if yuv color space conversion is needed, we do it here on

  1795.            the destination image */

  1796.         if (dst_pix->color_type != src_pix->color_type) {

  1797.             const uint8_t *y_table, *c_table;

  1798.             if (dst_pix->color_type == FF_COLOR_YUV) {

  1799.                 y_table = y_jpeg_to_ccir;

  1800.                 c_table = c_jpeg_to_ccir;

  1801.             } else {

  1802.                 y_table = y_ccir_to_jpeg;

  1803.                 c_table = c_ccir_to_jpeg;

  1804.             }

  1805.             img_apply_table(dst->data[0], dst->linesize[0],

  1806.                             dst->data[0], dst->linesize[0],

  1807.                             dst_width, dst_height,

  1808.                             y_table);

  1809. 

  1810.             for(i = 1;i <= 2; i++)

  1811.                 img_apply_table(dst->data[i], dst->linesize[i],

  1812.                                 dst->data[i], dst->linesize[i],

  1813.                                 dst_width>>dst_pix->x_chroma_shift, 

  1814.                                 dst_height>>dst_pix->y_chroma_shift,

  1815.                                 c_table);

  1816.         }

  1817.         return 0;

  1818.     }

  1819.  no_chroma_filter:

  1820. 

  1821.     /* try to use an intermediate format */

  1822.     if (src_pix_fmt == PIX_FMT_YUV422 ||

  1823.         dst_pix_fmt == PIX_FMT_YUV422) {

  1824.         /* specific case: convert to YUV422P first */

  1825.         int_pix_fmt = PIX_FMT_YUV422P;

  1826.     } else if ((src_pix->color_type == FF_COLOR_GRAY &&

  1827.                 src_pix_fmt != PIX_FMT_GRAY8) || 

  1828.                (dst_pix->color_type == FF_COLOR_GRAY &&

  1829.                 dst_pix_fmt != PIX_FMT_GRAY8)) {

  1830.         /* gray8 is the normalized format */

  1831.         int_pix_fmt = PIX_FMT_GRAY8;

  1832.     } else if ((is_yuv_planar(src_pix) && 

  1833.                 src_pix_fmt != PIX_FMT_YUV444P &&

  1834.                 src_pix_fmt != PIX_FMT_YUVJ444P)) {

  1835.         /* yuv444 is the normalized format */

  1836.         if (src_pix->color_type == FF_COLOR_YUV_JPEG)

  1837.             int_pix_fmt = PIX_FMT_YUVJ444P;

  1838.         else

  1839.             int_pix_fmt = PIX_FMT_YUV444P;

  1840.     } else if ((is_yuv_planar(dst_pix) && 

  1841.                 dst_pix_fmt != PIX_FMT_YUV444P &&

  1842.                 dst_pix_fmt != PIX_FMT_YUVJ444P)) {

  1843.         /* yuv444 is the normalized format */

  1844.         if (dst_pix->color_type == FF_COLOR_YUV_JPEG)

  1845.             int_pix_fmt = PIX_FMT_YUVJ444P;

  1846.         else

  1847.             int_pix_fmt = PIX_FMT_YUV444P;

  1848.     } else {

  1849.         /* the two formats are rgb or gray8 or yuv[j]444p */

  1850.         if (src_pix->is_alpha && dst_pix->is_alpha)

  1851.             int_pix_fmt = PIX_FMT_RGBA32;

  1852.         else

  1853.             int_pix_fmt = PIX_FMT_RGB24;

  1854.     }

  1855.     if (avpicture_alloc(tmp, int_pix_fmt, dst_width, dst_height) < 0)

  1856.         return -1;

  1857.     ret = -1;

  1858.     if (img_convert(tmp, int_pix_fmt,

  1859.                     src, src_pix_fmt, src_width, src_height) < 0)

  1860.         goto fail1;

  1861.     if (img_convert(dst, dst_pix_fmt,

  1862.                     tmp, int_pix_fmt, dst_width, dst_height) < 0)

  1863.         goto fail1;

  1864.     ret = 0;

  1865.  fail1:

  1866.     avpicture_free(tmp);

  1867.     return ret;

  1868. }

  1869. 

  1870. /* NOTE: we scan all the pixels to have an exact information */

  1871. static int get_alpha_info_pal8(AVPicture *src, int width, int height)

  1872. {

  1873.     const unsigned char *p;

  1874.     int src_wrap, ret, x, y;

  1875.     unsigned int a;

  1876.     uint32_t *palette = (uint32_t *)src->data[1];

  1877.     

  1878.     p = src->data[0];

  1879.     src_wrap = src->linesize[0] - width;

  1880.     ret = 0;

  1881.     for(y=0;y<height;y++) {

  1882.         for(x=0;x<width;x++) {

  1883.             a = palette[p[0]] >> 24;

  1884.             if (a == 0x00) {

  1885.                 ret |= FF_ALPHA_TRANSP;

  1886.             } else if (a != 0xff) {

  1887.                 ret |= FF_ALPHA_SEMI_TRANSP;

  1888.             }

  1889.             p++;

  1890.         }

  1891.         p += src_wrap;

  1892.     }

  1893.     return ret;

  1894. }

  1895. 

  1896. /**

  1897.  * Tell if an image really has transparent alpha values.

  1898.  * @return ored mask of FF_ALPHA_xxx constants

  1899.  */

  1900. int img_get_alpha_info(AVPicture *src, int pix_fmt, int width, int height)

  1901. {

  1902.     PixFmtInfo *pf = &pix_fmt_info[pix_fmt];

  1903.     int ret;

  1904. 

  1905.     pf = &pix_fmt_info[pix_fmt];

  1906.     /* no alpha can be represented in format */

  1907.     if (!pf->is_alpha)

  1908.         return 0;

  1909.     switch(pix_fmt) {

  1910.     case PIX_FMT_RGBA32:

  1911.         ret = get_alpha_info_rgba32(src, width, height);

  1912.         break;

  1913.     case PIX_FMT_RGB555:

  1914.         ret = get_alpha_info_rgb555(src, width, height);

  1915.         break;

  1916.     case PIX_FMT_PAL8:

  1917.         ret = get_alpha_info_pal8(src, width, height);

  1918.         break;

  1919.     default:

  1920.         /* we do not know, so everything is indicated */

  1921.         ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;

  1922.         break;

  1923.     }

  1924.     return ret;

  1925. }

  1926. 

  1927. #ifdef HAVE_MMX

  1928. #define DEINT_INPLACE_LINE_LUM \

  1929.                     movd_m2r(lum_m4[0],mm0);\

  1930.                     movd_m2r(lum_m3[0],mm1);\

  1931.                     movd_m2r(lum_m2[0],mm2);\

  1932.                     movd_m2r(lum_m1[0],mm3);\

  1933.                     movd_m2r(lum[0],mm4);\

  1934.                     punpcklbw_r2r(mm7,mm0);\

  1935.                     movd_r2m(mm2,lum_m4[0]);\

  1936.                     punpcklbw_r2r(mm7,mm1);\

  1937.                     punpcklbw_r2r(mm7,mm2);\

  1938.                     punpcklbw_r2r(mm7,mm3);\

  1939.                     punpcklbw_r2r(mm7,mm4);\

  1940.                     paddw_r2r(mm3,mm1);\

  1941.                     psllw_i2r(1,mm2);\

  1942.                     paddw_r2r(mm4,mm0);\

  1943.                     psllw_i2r(2,mm1);\

  1944.                     paddw_r2r(mm6,mm2);\

  1945.                     paddw_r2r(mm2,mm1);\

  1946.                     psubusw_r2r(mm0,mm1);\

  1947.                     psrlw_i2r(3,mm1);\

  1948.                     packuswb_r2r(mm7,mm1);\

  1949.                     movd_r2m(mm1,lum_m2[0]);

  1950. 

  1951. #define DEINT_LINE_LUM \

  1952.                     movd_m2r(lum_m4[0],mm0);\

  1953.                     movd_m2r(lum_m3[0],mm1);\

  1954.                     movd_m2r(lum_m2[0],mm2);\

  1955.                     movd_m2r(lum_m1[0],mm3);\

  1956.                     movd_m2r(lum[0],mm4);\

  1957.                     punpcklbw_r2r(mm7,mm0);\

  1958.                     punpcklbw_r2r(mm7,mm1);\

  1959.                     punpcklbw_r2r(mm7,mm2);\

  1960.                     punpcklbw_r2r(mm7,mm3);\

  1961.                     punpcklbw_r2r(mm7,mm4);\

  1962.                     paddw_r2r(mm3,mm1);\

  1963.                     psllw_i2r(1,mm2);\

  1964.                     paddw_r2r(mm4,mm0);\

  1965.                     psllw_i2r(2,mm1);\

  1966.                     paddw_r2r(mm6,mm2);\

  1967.                     paddw_r2r(mm2,mm1);\

  1968.                     psubusw_r2r(mm0,mm1);\

  1969.                     psrlw_i2r(3,mm1);\

  1970.                     packuswb_r2r(mm7,mm1);\

  1971.                     movd_r2m(mm1,dst[0]);

  1972. #endif

  1973. 

  1974. /* filter parameters: [-1 4 2 4 -1] // 8 */

  1975. static void deinterlace_line(uint8_t *dst, uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,

  1976.                                 int size)

  1977. {

  1978. #ifndef HAVE_MMX

  1979.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  1980.     int sum;

  1981. 

  1982.     for(;size > 0;size--) {

  1983.         sum = -lum_m4[0];

  1984.         sum += lum_m3[0] << 2;

  1985.         sum += lum_m2[0] << 1;

  1986.         sum += lum_m1[0] << 2;

  1987.         sum += -lum[0];

  1988.         dst[0] = cm[(sum + 4) >> 3];

  1989.         lum_m4++;

  1990.         lum_m3++;

  1991.         lum_m2++;

  1992.         lum_m1++;

  1993.         lum++;

  1994.         dst++;

  1995.     }

  1996. #else

  1997. 

  1998.     {

  1999.         mmx_t rounder;

  2000.         rounder.uw[0]=4;

  2001.         rounder.uw[1]=4;

  2002.         rounder.uw[2]=4;

  2003.         rounder.uw[3]=4;

  2004.         pxor_r2r(mm7,mm7);

  2005.         movq_m2r(rounder,mm6);

  2006.     }

  2007.     for (;size > 3; size-=4) {

  2008.         DEINT_LINE_LUM

  2009.         lum_m4+=4;

  2010.         lum_m3+=4;

  2011.         lum_m2+=4;

  2012.         lum_m1+=4;

  2013.         lum+=4;

  2014.         dst+=4;

  2015.     }

  2016. #endif

  2017. }

  2018. static void deinterlace_line_inplace(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,

  2019.                              int size)

  2020. {

  2021. #ifndef HAVE_MMX

  2022.     uint8_t *cm = cropTbl + MAX_NEG_CROP;

  2023.     int sum;

  2024. 

  2025.     for(;size > 0;size--) {

  2026.         sum = -lum_m4[0];

  2027.         sum += lum_m3[0] << 2;

  2028.         sum += lum_m2[0] << 1;

  2029.         lum_m4[0]=lum_m2[0];

  2030.         sum += lum_m1[0] << 2;

  2031.         sum += -lum[0];

  2032.         lum_m2[0] = cm[(sum + 4) >> 3];

  2033.         lum_m4++;

  2034.         lum_m3++;

  2035.         lum_m2++;

  2036.         lum_m1++;

  2037.         lum++;

  2038.     }

  2039. #else

  2040. 

  2041.     {

  2042.         mmx_t rounder;

  2043.         rounder.uw[0]=4;

  2044.         rounder.uw[1]=4;

  2045.         rounder.uw[2]=4;

  2046.         rounder.uw[3]=4;

  2047.         pxor_r2r(mm7,mm7);

  2048.         movq_m2r(rounder,mm6);

  2049.     }

  2050.     for (;size > 3; size-=4) {

  2051.         DEINT_INPLACE_LINE_LUM

  2052.         lum_m4+=4;

  2053.         lum_m3+=4;

  2054.         lum_m2+=4;

  2055.         lum_m1+=4;

  2056.         lum+=4;

  2057.     }

  2058. #endif

  2059. }

  2060. 

  2061. /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The

  2062.    top field is copied as is, but the bottom field is deinterlaced

  2063.    against the top field. */

  2064. static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,

  2065.                                     uint8_t *src1, int src_wrap,

  2066.                                     int width, int height)

  2067. {

  2068.     uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;

  2069.     int y;

  2070. 

  2071.     src_m2 = src1;

  2072.     src_m1 = src1;

  2073.     src_0=&src_m1[src_wrap];

  2074.     src_p1=&src_0[src_wrap];

  2075.     src_p2=&src_p1[src_wrap];

  2076.     for(y=0;y<(height-2);y+=2) {

  2077.         memcpy(dst,src_m1,width);

  2078.         dst += dst_wrap;

  2079.         deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);

  2080.         src_m2 = src_0;

  2081.         src_m1 = src_p1;

  2082.         src_0 = src_p2;

  2083.         src_p1 += 2*src_wrap;

  2084.         src_p2 += 2*src_wrap;

  2085.         dst += dst_wrap;

  2086.     }

  2087.     memcpy(dst,src_m1,width);

  2088.     dst += dst_wrap;

  2089.     /* do last line */

  2090.     deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);

  2091. }

  2092. 

  2093. static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,

  2094.                                      int width, int height)

  2095. {

  2096.     uint8_t *src_m1, *src_0, *src_p1, *src_p2;

  2097.     int y;

  2098.     uint8_t *buf;

  2099.     buf = (uint8_t*)av_malloc(width);

  2100. 

  2101.     src_m1 = src1;

  2102.     memcpy(buf,src_m1,width);

  2103.     src_0=&src_m1[src_wrap];

  2104.     src_p1=&src_0[src_wrap];

  2105.     src_p2=&src_p1[src_wrap];

  2106.     for(y=0;y<(height-2);y+=2) {

  2107.         deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);

  2108.         src_m1 = src_p1;

  2109.         src_0 = src_p2;

  2110.         src_p1 += 2*src_wrap;

  2111.         src_p2 += 2*src_wrap;

  2112.     }

  2113.     /* do last line */

  2114.     deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);

  2115.     av_free(buf);

  2116. }

  2117. 

  2118. 

  2119. /* deinterlace - if not supported return -1 */

  2120. int avpicture_deinterlace(AVPicture *dst, AVPicture *src,

  2121.                           int pix_fmt, int width, int height)

  2122. {

  2123.     int i;

  2124. 

  2125.     if (pix_fmt != PIX_FMT_YUV420P &&

  2126.         pix_fmt != PIX_FMT_YUV422P &&

  2127.         pix_fmt != PIX_FMT_YUV444P)

  2128.         return -1;

  2129.     if ((width & 3) != 0 || (height & 3) != 0)

  2130.         return -1;

  2131. 

  2132.     for(i=0;i<3;i++) {

  2133.         if (i == 1) {

  2134.             switch(pix_fmt) {

  2135.             case PIX_FMT_YUV420P:

  2136.                 width >>= 1;

  2137.                 height >>= 1;

  2138.                 break;

  2139.             case PIX_FMT_YUV422P:

  2140.                 width >>= 1;

  2141.                 break;

  2142.             default:

  2143.                 break;

  2144.             }

  2145.         }

  2146.         if (src == dst) {

  2147.             deinterlace_bottom_field_inplace(src->data[i], src->linesize[i],

  2148.                                  width, height);

  2149.         } else {

  2150.             deinterlace_bottom_field(dst->data[i],dst->linesize[i],

  2151.                                         src->data[i], src->linesize[i],

  2152.                                         width, height);

  2153.         }

  2154.     }

  2155. #ifdef HAVE_MMX

  2156.     emms();

  2157. #endif

  2158.     return 0;

  2159. }

  2160. 

  2161. #undef FIX