4 * Copyright (c) 2011 Konstantin Shishkov
6 * This file is part of FFmpeg.
8 * FFmpeg 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.
13 * FFmpeg 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.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "libavutil/common.h"
26 #include "libavutil/intreadwrite.h"
28 #define BITSTREAM_READER_LE
30 #include "bytestream.h"
35 static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
36 const uint8_t *src, int src_size,
43 if (src_size < avctx->width * avctx->height * (int64_t)bpp) {
44 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
45 return AVERROR_INVALIDDATA;
49 if ((ret = ff_get_buffer(avctx, pic, 0)) < 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];
62 static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
63 const uint8_t *src, int src_size)
66 uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
69 if (src_size < FFALIGN(avctx->width, 4) * FFALIGN(avctx->height, 4) * 9LL / 8) {
70 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
71 return AVERROR_INVALIDDATA;
74 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
75 if ((ret = ff_get_buffer(avctx, pic, 0)) < 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;
84 for (h = 0; h < avctx->height; h += 4) {
85 for (w = 0; w < avctx->width; w += 4) {
86 AV_COPY32U(Y1 + w, src);
87 AV_COPY32U(Y2 + w, src + 4);
88 AV_COPY32U(Y3 + w, src + 8);
89 AV_COPY32U(Y4 + w, src + 12);
90 U[w >> 2] = src[16] + 0x80;
91 V[w >> 2] = src[17] + 0x80;
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];
105 static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
106 const uint8_t *src, int src_size)
109 uint8_t *Y1, *Y2, *U, *V;
112 if (src_size < FFALIGN(avctx->width, 2) * FFALIGN(avctx->height, 2) * 3LL / 2) {
113 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
114 return AVERROR_INVALIDDATA;
117 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
118 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
122 Y2 = pic->data[0] + pic->linesize[0];
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;
133 Y1 += pic->linesize[0] << 1;
134 Y2 += pic->linesize[0] << 1;
135 U += pic->linesize[1];
136 V += pic->linesize[2];
142 static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
143 const uint8_t *src, int src_size)
149 if (src_size < avctx->width * avctx->height * 3LL) {
150 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
151 return AVERROR_INVALIDDATA;
154 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
155 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
161 for (h = 0; h < avctx->height; h++) {
162 for (w = 0; w < avctx->width; w++) {
164 U[w] = *src++ ^ 0x80;
165 V[w] = *src++ ^ 0x80;
167 Y += pic->linesize[0];
168 U += pic->linesize[1];
169 V += pic->linesize[2];
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 };
179 static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
183 c = get_unary(gb, 0, 8);
185 val = get_bits(gb, 8);
186 memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
189 memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
196 static int check_slice_size(AVCodecContext *avctx,
197 const uint8_t *src, int src_size,
198 int slice_size, int off)
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;
208 if (slice_size <= 16) {
209 av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n",
211 return AVERROR_INVALIDDATA;
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);
224 static int load_buffer(AVCodecContext *avctx,
225 const uint8_t *src, int src_size,
227 int *nslices, int *off)
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;
238 avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,
239 avctx->width, avctx->height);
240 return AVERROR_PATCHWELCOME;
246 static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
251 c = get_unary(gb, 0, bits);
253 val = get_bits(gb, bits);
254 memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
257 memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
264 typedef int (*decode_slice_func)(GetBitContext *gb, AVFrame *frame,
265 int line, int height, uint8_t lru[3][8]);
267 typedef void (*setup_lru_func)(uint8_t lru[3][8]);
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)
277 int nslices, slice, line = 0;
278 uint32_t off, slice_size;
282 ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
286 avctx->pix_fmt = fmt;
287 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
290 for (slice = 0; slice < nslices; slice++) {
291 slice_size = bytestream2_get_le32(&gb);
295 ret = check_slice_size(avctx, src, src_size, slice_size, off);
299 if ((ret = init_get_bits8(&gb2, src + off + 16, slice_size - 16)) < 0)
302 line += decode_slice(&gb2, pic, line, avctx->height - line, lru);
307 if (avctx->height - line) {
308 av_log(avctx, AV_LOG_VERBOSE,
309 "Not enough slice data available, "
310 "cropping the frame by %d pixels\n",
311 avctx->height - line);
312 avctx->height = line;
319 static int dx2_decode_slice_5x5(GetBitContext *gb, AVFrame *frame,
320 int line, int left, uint8_t lru[3][8],
325 int width = frame->width;
326 int stride = frame->linesize[0];
327 uint8_t *dst = frame->data[0] + stride * line;
329 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
330 for (x = 0; x < width; x++) {
331 b = decode_sym_565(gb, lru[0], 5);
332 g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
333 r = decode_sym_565(gb, lru[2], 5);
334 dst[x * 3 + 0] = (r << 3) | (r >> 2);
335 dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
336 dst[x * 3 + 2] = (b << 3) | (b >> 2);
345 static void setup_lru_555(uint8_t lru[3][8])
347 memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
348 memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru));
349 memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
352 static void setup_lru_565(uint8_t lru[3][8])
354 memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
355 memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru));
356 memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
359 static int dx2_decode_slice_555(GetBitContext *gb, AVFrame *frame,
360 int line, int left, uint8_t lru[3][8])
362 return dx2_decode_slice_5x5(gb, frame, line, left, lru, 0);
365 static int dx2_decode_slice_565(GetBitContext *gb, AVFrame *frame,
366 int line, int left, uint8_t lru[3][8])
368 return dx2_decode_slice_5x5(gb, frame, line, left, lru, 1);
371 static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
372 const uint8_t *src, int src_size, int is_565)
374 enum AVPixelFormat fmt = AV_PIX_FMT_RGB24;
376 return dxtory_decode_v2(avctx, pic, src, src_size,
377 dx2_decode_slice_565,
381 return dxtory_decode_v2(avctx, pic, src, src_size,
382 dx2_decode_slice_555,
387 static int dx2_decode_slice_rgb(GetBitContext *gb, AVFrame *frame,
388 int line, int left, uint8_t lru[3][8])
391 int width = frame->width;
392 int stride = frame->linesize[0];
393 uint8_t *dst = frame->data[0] + stride * line;
395 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
396 for (x = 0; x < width; x++) {
397 dst[x * 3 + 0] = decode_sym(gb, lru[0]);
398 dst[x * 3 + 1] = decode_sym(gb, lru[1]);
399 dst[x * 3 + 2] = decode_sym(gb, lru[2]);
408 static void default_setup_lru(uint8_t lru[3][8])
412 for (i = 0; i < 3; i++)
413 memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
416 static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
417 const uint8_t *src, int src_size)
419 return dxtory_decode_v2(avctx, pic, src, src_size,
420 dx2_decode_slice_rgb,
425 static int dx2_decode_slice_410(GetBitContext *gb, AVFrame *frame,
430 int width = frame->width;
432 int ystride = frame->linesize[0];
433 int ustride = frame->linesize[1];
434 int vstride = frame->linesize[2];
436 uint8_t *Y = frame->data[0] + ystride * line;
437 uint8_t *U = frame->data[1] + (ustride >> 2) * line;
438 uint8_t *V = frame->data[2] + (vstride >> 2) * line;
440 for (y = 0; y < left - 3 && get_bits_left(gb) > 16; y += 4) {
441 for (x = 0; x < width; x += 4) {
442 for (j = 0; j < 4; j++)
443 for (i = 0; i < 4; i++)
444 Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
445 U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
446 V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
458 static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
459 const uint8_t *src, int src_size)
461 return dxtory_decode_v2(avctx, pic, src, src_size,
462 dx2_decode_slice_410,
467 static int dx2_decode_slice_420(GetBitContext *gb, AVFrame *frame,
473 int width = frame->width;
475 int ystride = frame->linesize[0];
476 int ustride = frame->linesize[1];
477 int vstride = frame->linesize[2];
479 uint8_t *Y = frame->data[0] + ystride * line;
480 uint8_t *U = frame->data[1] + (ustride >> 1) * line;
481 uint8_t *V = frame->data[2] + (vstride >> 1) * line;
484 for (y = 0; y < left - 1 && get_bits_left(gb) > 16; y += 2) {
485 for (x = 0; x < width; x += 2) {
486 Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
487 Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
488 Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
489 Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
490 U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
491 V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
502 static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
503 const uint8_t *src, int src_size)
505 return dxtory_decode_v2(avctx, pic, src, src_size,
506 dx2_decode_slice_420,
511 static int dx2_decode_slice_444(GetBitContext *gb, AVFrame *frame,
517 int width = frame->width;
519 int ystride = frame->linesize[0];
520 int ustride = frame->linesize[1];
521 int vstride = frame->linesize[2];
523 uint8_t *Y = frame->data[0] + ystride * line;
524 uint8_t *U = frame->data[1] + ustride * line;
525 uint8_t *V = frame->data[2] + vstride * line;
527 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
528 for (x = 0; x < width; x++) {
529 Y[x] = decode_sym(gb, lru[0]);
530 U[x] = decode_sym(gb, lru[1]) ^ 0x80;
531 V[x] = decode_sym(gb, lru[2]) ^ 0x80;
542 static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
543 const uint8_t *src, int src_size)
545 return dxtory_decode_v2(avctx, pic, src, src_size,
546 dx2_decode_slice_444,
551 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
555 const uint8_t *src = avpkt->data;
558 if (avpkt->size < 16) {
559 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
560 return AVERROR_INVALIDDATA;
563 switch (AV_RB32(src)) {
565 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
566 AV_PIX_FMT_BGR24, 3);
569 ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);
572 ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);
575 ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);
578 ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);
581 ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);
584 ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);
587 ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);
590 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
591 AV_PIX_FMT_RGB565LE, 2);
594 ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);
598 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
599 AV_PIX_FMT_RGB555LE, 2);
603 ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);
606 avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src));
607 return AVERROR_PATCHWELCOME;
613 pic->pict_type = AV_PICTURE_TYPE_I;
620 AVCodec ff_dxtory_decoder = {
622 .long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
623 .type = AVMEDIA_TYPE_VIDEO,
624 .id = AV_CODEC_ID_DXTORY,
625 .decode = decode_frame,
626 .capabilities = AV_CODEC_CAP_DR1,