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FFmpeg/libavcodec/dxtory.c

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  1. /*

  2.  * Dxtory decoder

  3.  *

  4.  * Copyright (c) 2011 Konstantin Shishkov

  5.  *

  6.  * This file is part of Libav.

  7.  *

  8.  * Libav is free software; you can redistribute it and/or

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

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

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * Libav is distributed in the hope that it will be useful,

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

  19.  * License along with Libav; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. #include <inttypes.h>

  24. 

  25. #include "libavutil/common.h"

  26. #include "libavutil/intreadwrite.h"

  27. 

  28. #define BITSTREAM_READER_LE

  29. #include "avcodec.h"

  30. #include "bitstream.h"

  31. #include "bytestream.h"

  32. #include "internal.h"

  33. #include "unary.h"

  34. 

  35. static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,

  36.                                 const uint8_t *src, int src_size,

  37.                                 int id, int bpp)

  38. {

  39.     int h;

  40.     uint8_t *dst;

  41.     int ret;

  42. 

  43.     if (src_size < avctx->width * avctx->height * bpp) {

  44.         av_log(avctx, AV_LOG_ERROR, "packet too small\n");

  45.         return AVERROR_INVALIDDATA;

  46.     }

  47. 

  48.     avctx->pix_fmt = id;

  49.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)

  50.         return ret;

  51. 

  52.     dst = pic->data[0];

  53.     for (h = 0; h < avctx->height; h++) {

  54.         memcpy(dst, src, avctx->width * bpp);

  55.         src += avctx->width * bpp;

  56.         dst += pic->linesize[0];

  57.     }

  58. 

  59.     return 0;

  60. }

  61. 

  62. static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,

  63.                                 const uint8_t *src, int src_size)

  64. {

  65.     int h, w;

  66.     uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;

  67.     int ret;

  68. 

  69.     if (src_size < avctx->width * avctx->height * 18 / 16) {

  70.         av_log(avctx, AV_LOG_ERROR, "packet too small\n");

  71.         return AVERROR_INVALIDDATA;

  72.     }

  73. 

  74.     avctx->pix_fmt = AV_PIX_FMT_YUV410P;

  75.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)

  76.         return ret;

  77. 

  78.     Y1 = pic->data[0];

  79.     Y2 = pic->data[0] + pic->linesize[0];

  80.     Y3 = pic->data[0] + pic->linesize[0] * 2;

  81.     Y4 = pic->data[0] + pic->linesize[0] * 3;

  82.     U  = pic->data[1];

  83.     V  = pic->data[2];

  84.     for (h = 0; h < avctx->height; h += 4) {

  85.         for (w = 0; w < avctx->width; w += 4) {

  86.             AV_COPY32(Y1 + w, src);

  87.             AV_COPY32(Y2 + w, src + 4);

  88.             AV_COPY32(Y3 + w, src + 8);

  89.             AV_COPY32(Y4 + w, src + 12);

  90.             U[w >> 2] = src[16] + 0x80;

  91.             V[w >> 2] = src[17] + 0x80;

  92.             src += 18;

  93.         }

  94.         Y1 += pic->linesize[0] << 2;

  95.         Y2 += pic->linesize[0] << 2;

  96.         Y3 += pic->linesize[0] << 2;

  97.         Y4 += pic->linesize[0] << 2;

  98.         U  += pic->linesize[1];

  99.         V  += pic->linesize[2];

  100.     }

  101. 

  102.     return 0;

  103. }

  104. 

  105. static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,

  106.                                 const uint8_t *src, int src_size)

  107. {

  108.     int h, w;

  109.     uint8_t *Y1, *Y2, *U, *V;

  110.     int ret;

  111. 

  112.     if (src_size < avctx->width * avctx->height * 3 / 2) {

  113.         av_log(avctx, AV_LOG_ERROR, "packet too small\n");

  114.         return AVERROR_INVALIDDATA;

  115.     }

  116. 

  117.     avctx->pix_fmt = AV_PIX_FMT_YUV420P;

  118.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)

  119.         return ret;

  120. 

  121.     Y1 = pic->data[0];

  122.     Y2 = pic->data[0] + pic->linesize[0];

  123.     U  = pic->data[1];

  124.     V  = pic->data[2];

  125.     for (h = 0; h < avctx->height; h += 2) {

  126.         for (w = 0; w < avctx->width; w += 2) {

  127.             AV_COPY16(Y1 + w, src);

  128.             AV_COPY16(Y2 + w, src + 2);

  129.             U[w >> 1] = src[4] + 0x80;

  130.             V[w >> 1] = src[5] + 0x80;

  131.             src += 6;

  132.         }

  133.         Y1 += pic->linesize[0] << 1;

  134.         Y2 += pic->linesize[0] << 1;

  135.         U  += pic->linesize[1];

  136.         V  += pic->linesize[2];

  137.     }

  138. 

  139.     return 0;

  140. }

  141. 

  142. static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,

  143.                                 const uint8_t *src, int src_size)

  144. {

  145.     int h, w;

  146.     uint8_t *Y, *U, *V;

  147.     int ret;

  148. 

  149.     if (src_size < avctx->width * avctx->height * 3) {

  150.         av_log(avctx, AV_LOG_ERROR, "packet too small\n");

  151.         return AVERROR_INVALIDDATA;

  152.     }

  153. 

  154.     avctx->pix_fmt = AV_PIX_FMT_YUV444P;

  155.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)

  156.         return ret;

  157. 

  158.     Y = pic->data[0];

  159.     U = pic->data[1];

  160.     V = pic->data[2];

  161.     for (h = 0; h < avctx->height; h++) {

  162.         for (w = 0; w < avctx->width; w++) {

  163.             Y[w] = *src++;

  164.             U[w] = *src++ ^ 0x80;

  165.             V[w] = *src++ ^ 0x80;

  166.         }

  167.         Y += pic->linesize[0];

  168.         U += pic->linesize[1];

  169.         V += pic->linesize[2];

  170.     }

  171. 

  172.     return 0;

  173. }

  174. 

  175. static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };

  176. static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };

  177. static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };

  178. 

  179. static inline uint8_t decode_sym(BitstreamContext *bc, uint8_t lru[8])

  180. {

  181.     uint8_t c, val;

  182. 

  183.     c = get_unary(bc, 0, 8);

  184.     if (!c) {

  185.         val = bitstream_read(bc, 8);

  186.         memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));

  187.     } else {

  188.         val = lru[c - 1];

  189.         memmove(lru + 1, lru, sizeof(*lru) * (c - 1));

  190.     }

  191.     lru[0] = val;

  192. 

  193.     return val;

  194. }

  195. 

  196. static int check_slice_size(AVCodecContext *avctx,

  197.                             const uint8_t *src, int src_size,

  198.                             int slice_size, int off)

  199. {

  200.     int cur_slice_size;

  201. 

  202.     if (slice_size > src_size - off) {

  203.         av_log(avctx, AV_LOG_ERROR,

  204.                "invalid slice size %d (only %d bytes left)\n",

  205.                slice_size, src_size - off);

  206.         return AVERROR_INVALIDDATA;

  207.     }

  208.     if (slice_size <= 16) {

  209.         av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n",

  210.                slice_size);

  211.         return AVERROR_INVALIDDATA;

  212.     }

  213. 

  214.     cur_slice_size = AV_RL32(src + off);

  215.     if (cur_slice_size != slice_size - 16) {

  216.         av_log(avctx, AV_LOG_ERROR,

  217.                "Slice sizes mismatch: got %d instead of %d\n",

  218.                cur_slice_size, slice_size - 16);

  219.     }

  220. 

  221.     return 0;

  222. }

  223. 

  224. static int load_buffer(AVCodecContext *avctx,

  225.                        const uint8_t *src, int src_size,

  226.                        GetByteContext *gb,

  227.                        int *nslices, int *off)

  228. {

  229.     bytestream2_init(gb, src, src_size);

  230.     *nslices = bytestream2_get_le16(gb);

  231.     *off = FFALIGN(*nslices * 4 + 2, 16);

  232.     if (src_size < *off) {

  233.         av_log(avctx, AV_LOG_ERROR, "no slice data\n");

  234.         return AVERROR_INVALIDDATA;

  235.     }

  236. 

  237.     if (!*nslices) {

  238.         avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,

  239.                               avctx->width, avctx->height);

  240.         return AVERROR_PATCHWELCOME;

  241.     }

  242. 

  243.     return 0;

  244. }

  245. 

  246. static inline uint8_t decode_sym_565(BitstreamContext *bc, uint8_t lru[8],

  247.                                      int bits)

  248. {

  249.     uint8_t c, val;

  250. 

  251.     c = get_unary(bc, 0, bits);

  252.     if (!c) {

  253.         val = bitstream_read(bc, bits);

  254.         memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));

  255.     } else {

  256.         val = lru[c - 1];

  257.         memmove(lru + 1, lru, sizeof(*lru) * (c - 1));

  258.     }

  259.     lru[0] = val;

  260. 

  261.     return val;

  262. }

  263. 

  264. typedef int (*decode_slice_func)(BitstreamContext *bc, AVFrame *frame,

  265.                                  int line, int height, uint8_t lru[3][8]);

  266. 

  267. typedef void (*setup_lru_func)(uint8_t lru[3][8]);

  268. 

  269. static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,

  270.                             const uint8_t *src, int src_size,

  271.                             decode_slice_func decode_slice,

  272.                             setup_lru_func setup_lru,

  273.                             enum AVPixelFormat fmt)

  274. {

  275.     GetByteContext gb;

  276.     BitstreamContext bc;

  277.     int nslices, slice, line = 0;

  278.     uint32_t off, slice_size;

  279.     uint8_t lru[3][8];

  280.     int ret;

  281. 

  282.     ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);

  283.     if (ret < 0)

  284.         return ret;

  285. 

  286.     avctx->pix_fmt = fmt;

  287.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)

  288.         return ret;

  289. 

  290.     for (slice = 0; slice < nslices; slice++) {

  291.         slice_size = bytestream2_get_le32(&gb);

  292. 

  293.         setup_lru(lru);

  294. 

  295.         ret = check_slice_size(avctx, src, src_size, slice_size, off);

  296.         if (ret < 0)

  297.             return ret;

  298. 

  299.         bitstream_init8(&bc, src + off + 16, slice_size - 16);

  300. 

  301.         line += decode_slice(&bc, pic, line, avctx->height - line, lru);

  302. 

  303.         off += slice_size;

  304.     }

  305. 

  306.     if (avctx->height - line) {

  307.         av_log(avctx, AV_LOG_VERBOSE,

  308.                "Not enough slice data available, "

  309.                "cropping the frame by %d pixels\n",

  310.                 avctx->height - line);

  311.         avctx->height = line;

  312.     }

  313. 

  314.     return 0;

  315. }

  316. 

  317. av_always_inline

  318. static int dx2_decode_slice_5x5(BitstreamContext *bc, AVFrame *frame,

  319.                                 int line, int left, uint8_t lru[3][8],

  320.                                 int is_565)

  321. {

  322.     int x, y;

  323.     int r, g, b;

  324.     int width    = frame->width;

  325.     int stride   = frame->linesize[0];

  326.     uint8_t *dst = frame->data[0] + stride * line;

  327. 

  328.     for (y = 0; y < left && bitstream_bits_left(bc) > 16; y++) {

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

  330.             b = decode_sym_565(bc, lru[0], 5);

  331.             g = decode_sym_565(bc, lru[1], is_565 ? 6 : 5);

  332.             r = decode_sym_565(bc, lru[2], 5);

  333.             dst[x * 3 + 0] = (r << 3) | (r >> 2);

  334.             dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);

  335.             dst[x * 3 + 2] = (b << 3) | (b >> 2);

  336.         }

  337. 

  338.         dst += stride;

  339.     }

  340. 

  341.     return y;

  342. }

  343. 

  344. static void setup_lru_555(uint8_t lru[3][8])

  345. {

  346.     memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));

  347.     memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru));

  348.     memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));

  349. }

  350. 

  351. static void setup_lru_565(uint8_t lru[3][8])

  352. {

  353.     memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));

  354.     memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru));

  355.     memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));

  356. }

  357. 

  358. static int dx2_decode_slice_555(BitstreamContext *bc, AVFrame *frame,

  359.                                 int line, int left, uint8_t lru[3][8])

  360. {

  361.     return dx2_decode_slice_5x5(bc, frame, line, left, lru, 0);

  362. }

  363. 

  364. static int dx2_decode_slice_565(BitstreamContext *bc, AVFrame *frame,

  365.                                 int line, int left, uint8_t lru[3][8])

  366. {

  367.     return dx2_decode_slice_5x5(bc, frame, line, left, lru, 1);

  368. }

  369. 

  370. static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,

  371.                                 const uint8_t *src, int src_size, int is_565)

  372. {

  373.     enum AVPixelFormat fmt = AV_PIX_FMT_RGB24;

  374.     if (is_565)

  375.         return dxtory_decode_v2(avctx, pic, src, src_size,

  376.                                 dx2_decode_slice_565,

  377.                                 setup_lru_565,

  378.                                 fmt);

  379.     else

  380.         return dxtory_decode_v2(avctx, pic, src, src_size,

  381.                                 dx2_decode_slice_555,

  382.                                 setup_lru_555,

  383.                                 fmt);

  384. }

  385. 

  386. static int dx2_decode_slice_rgb(BitstreamContext *bc, AVFrame *frame,

  387.                                 int line, int left, uint8_t lru[3][8])

  388. {

  389.     int x, y;

  390.     int width    = frame->width;

  391.     int stride   = frame->linesize[0];

  392.     uint8_t *dst = frame->data[0] + stride * line;

  393. 

  394.     for (y = 0; y < left && bitstream_bits_left(bc) > 16; y++) {

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

  396.             dst[x * 3 + 0] = decode_sym(bc, lru[0]);

  397.             dst[x * 3 + 1] = decode_sym(bc, lru[1]);

  398.             dst[x * 3 + 2] = decode_sym(bc, lru[2]);

  399.         }

  400. 

  401.         dst += stride;

  402.     }

  403. 

  404.     return y;

  405. }

  406. 

  407. static void default_setup_lru(uint8_t lru[3][8])

  408. {

  409.     int i;

  410. 

  411.     for (i = 0; i < 3; i++)

  412.         memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));

  413. }

  414. 

  415. static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,

  416.                                 const uint8_t *src, int src_size)

  417. {

  418.     return dxtory_decode_v2(avctx, pic, src, src_size,

  419.                             dx2_decode_slice_rgb,

  420.                             default_setup_lru,

  421.                             AV_PIX_FMT_BGR24);

  422. }

  423. 

  424. static int dx2_decode_slice_410(BitstreamContext *bc, AVFrame *frame,

  425.                                 int line, int left,

  426.                                 uint8_t lru[3][8])

  427. {

  428.     int x, y, i, j;

  429.     int width   = frame->width;

  430. 

  431.     int ystride = frame->linesize[0];

  432.     int ustride = frame->linesize[1];

  433.     int vstride = frame->linesize[2];

  434. 

  435.     uint8_t *Y  = frame->data[0] + ystride * line;

  436.     uint8_t *U  = frame->data[1] + (ustride >> 2) * line;

  437.     uint8_t *V  = frame->data[2] + (vstride >> 2) * line;

  438. 

  439.     for (y = 0; y < left - 3 && bitstream_bits_left(bc) > 16; y += 4) {

  440.         for (x = 0; x < width; x += 4) {

  441.             for (j = 0; j < 4; j++)

  442.                 for (i = 0; i < 4; i++)

  443.                     Y[x + i + j * ystride] = decode_sym(bc, lru[0]);

  444.             U[x >> 2] = decode_sym(bc, lru[1]) ^ 0x80;

  445.             V[x >> 2] = decode_sym(bc, lru[2]) ^ 0x80;

  446.         }

  447. 

  448.         Y += ystride << 2;

  449.         U += ustride;

  450.         V += vstride;

  451.     }

  452. 

  453.     return y;

  454. }

  455. 

  456. 

  457. static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,

  458.                                 const uint8_t *src, int src_size)

  459. {

  460.     return dxtory_decode_v2(avctx, pic, src, src_size,

  461.                             dx2_decode_slice_410,

  462.                             default_setup_lru,

  463.                             AV_PIX_FMT_YUV410P);

  464. }

  465. 

  466. static int dx2_decode_slice_420(BitstreamContext *bc, AVFrame *frame,

  467.                                 int line, int left,

  468.                                 uint8_t lru[3][8])

  469. {

  470.     int x, y;

  471. 

  472.     int width    = frame->width;

  473. 

  474.     int ystride = frame->linesize[0];

  475.     int ustride = frame->linesize[1];

  476.     int vstride = frame->linesize[2];

  477. 

  478.     uint8_t *Y  = frame->data[0] + ystride * line;

  479.     uint8_t *U  = frame->data[1] + (ustride >> 1) * line;

  480.     uint8_t *V  = frame->data[2] + (vstride >> 1) * line;

  481. 

  482. 

  483.     for (y = 0; y < left - 1 && bitstream_bits_left(bc) > 16; y += 2) {

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

  485.             Y[x + 0 + 0 * ystride] = decode_sym(bc, lru[0]);

  486.             Y[x + 1 + 0 * ystride] = decode_sym(bc, lru[0]);

  487.             Y[x + 0 + 1 * ystride] = decode_sym(bc, lru[0]);

  488.             Y[x + 1 + 1 * ystride] = decode_sym(bc, lru[0]);

  489.             U[x >> 1] = decode_sym(bc, lru[1]) ^ 0x80;

  490.             V[x >> 1] = decode_sym(bc, lru[2]) ^ 0x80;

  491.         }

  492. 

  493.         Y += ystride << 1;

  494.         U += ustride;

  495.         V += vstride;

  496.     }

  497. 

  498.     return y;

  499. }

  500. 

  501. static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,

  502.                                 const uint8_t *src, int src_size)

  503. {

  504.     return dxtory_decode_v2(avctx, pic, src, src_size,

  505.                             dx2_decode_slice_420,

  506.                             default_setup_lru,

  507.                             AV_PIX_FMT_YUV420P);

  508. }

  509. 

  510. static int dx2_decode_slice_444(BitstreamContext *bc, AVFrame *frame,

  511.                                 int line, int left,

  512.                                 uint8_t lru[3][8])

  513. {

  514.     int x, y;

  515. 

  516.     int width   = frame->width;

  517. 

  518.     int ystride = frame->linesize[0];

  519.     int ustride = frame->linesize[1];

  520.     int vstride = frame->linesize[2];

  521. 

  522.     uint8_t *Y  = frame->data[0] + ystride * line;

  523.     uint8_t *U  = frame->data[1] + ustride * line;

  524.     uint8_t *V  = frame->data[2] + vstride * line;

  525. 

  526.     for (y = 0; y < left && bitstream_bits_left(bc) > 16; y++) {

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

  528.             Y[x] = decode_sym(bc, lru[0]);

  529.             U[x] = decode_sym(bc, lru[1]) ^ 0x80;

  530.             V[x] = decode_sym(bc, lru[2]) ^ 0x80;

  531.         }

  532. 

  533.         Y += ystride;

  534.         U += ustride;

  535.         V += vstride;

  536.     }

  537. 

  538.     return y;

  539. }

  540. 

  541. static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,

  542.                                 const uint8_t *src, int src_size)

  543. {

  544.     return dxtory_decode_v2(avctx, pic, src, src_size,

  545.                             dx2_decode_slice_444,

  546.                             default_setup_lru,

  547.                             AV_PIX_FMT_YUV444P);

  548. }

  549. 

  550. static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,

  551.                         AVPacket *avpkt)

  552. {

  553.     AVFrame *pic = data;

  554.     const uint8_t *src = avpkt->data;

  555.     int ret;

  556. 

  557.     if (avpkt->size < 16) {

  558.         av_log(avctx, AV_LOG_ERROR, "packet too small\n");

  559.         return AVERROR_INVALIDDATA;

  560.     }

  561. 

  562.     switch (AV_RB32(src)) {

  563.     case 0x01000001:

  564.         ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,

  565.                                    AV_PIX_FMT_BGR24, 3);

  566.         break;

  567.     case 0x01000009:

  568.         ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);

  569.         break;

  570.     case 0x02000001:

  571.         ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);

  572.         break;

  573.     case 0x02000009:

  574.         ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);

  575.         break;

  576.     case 0x03000001:

  577.         ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);

  578.         break;

  579.     case 0x03000009:

  580.         ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);

  581.         break;

  582.     case 0x04000001:

  583.         ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);

  584.         break;

  585.     case 0x04000009:

  586.         ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);

  587.         break;

  588.     case 0x17000001:

  589.         ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,

  590.                                    AV_PIX_FMT_RGB565LE, 2);

  591.         break;

  592.     case 0x17000009:

  593.         ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);

  594.         break;

  595.     case 0x18000001:

  596.     case 0x19000001:

  597.         ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,

  598.                                    AV_PIX_FMT_RGB555LE, 2);

  599.         break;

  600.     case 0x18000009:

  601.     case 0x19000009:

  602.         ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);

  603.         break;

  604.     default:

  605.         avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src));

  606.         return AVERROR_PATCHWELCOME;

  607.     }

  608. 

  609.     if (ret)

  610.         return ret;

  611. 

  612.     pic->pict_type = AV_PICTURE_TYPE_I;

  613.     pic->key_frame = 1;

  614.     *got_frame = 1;

  615. 

  616.     return avpkt->size;

  617. }

  618. 

  619. AVCodec ff_dxtory_decoder = {

  620.     .name           = "dxtory",

  621.     .long_name      = NULL_IF_CONFIG_SMALL("Dxtory"),

  622.     .type           = AVMEDIA_TYPE_VIDEO,

  623.     .id             = AV_CODEC_ID_DXTORY,

  624.     .decode         = decode_frame,

  625.     .capabilities   = AV_CODEC_CAP_DR1,

  626. };