4 * Copyright (c) 2011 Konstantin Shishkov
6 * This file is part of Libav.
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.
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.
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
25 #define BITSTREAM_READER_LE
27 #include "bytestream.h"
31 #include "libavutil/common.h"
32 #include "libavutil/intreadwrite.h"
34 static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
35 const uint8_t *src, int src_size,
42 if (src_size < avctx->width * avctx->height * bpp) {
43 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
44 return AVERROR_INVALIDDATA;
48 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
52 for (h = 0; h < avctx->height; h++) {
53 memcpy(dst, src, avctx->width * bpp);
54 src += avctx->width * bpp;
55 dst += pic->linesize[0];
61 static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
62 const uint8_t *src, int src_size)
65 uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
68 if (src_size < avctx->width * avctx->height * 18 / 16) {
69 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
70 return AVERROR_INVALIDDATA;
73 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
74 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
78 Y2 = pic->data[0] + pic->linesize[0];
79 Y3 = pic->data[0] + pic->linesize[0] * 2;
80 Y4 = pic->data[0] + pic->linesize[0] * 3;
83 for (h = 0; h < avctx->height; h += 4) {
84 for (w = 0; w < avctx->width; w += 4) {
85 AV_COPY32(Y1 + w, src);
86 AV_COPY32(Y2 + w, src + 4);
87 AV_COPY32(Y3 + w, src + 8);
88 AV_COPY32(Y4 + w, src + 12);
89 U[w >> 2] = src[16] + 0x80;
90 V[w >> 2] = src[17] + 0x80;
93 Y1 += pic->linesize[0] << 2;
94 Y2 += pic->linesize[0] << 2;
95 Y3 += pic->linesize[0] << 2;
96 Y4 += pic->linesize[0] << 2;
97 U += pic->linesize[1];
98 V += pic->linesize[2];
104 static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
105 const uint8_t *src, int src_size)
108 uint8_t *Y1, *Y2, *U, *V;
111 if (src_size < avctx->width * avctx->height * 3 / 2) {
112 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
113 return AVERROR_INVALIDDATA;
116 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
117 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
121 Y2 = pic->data[0] + pic->linesize[0];
124 for (h = 0; h < avctx->height; h += 2) {
125 for (w = 0; w < avctx->width; w += 2) {
126 AV_COPY16(Y1 + w, src);
127 AV_COPY16(Y2 + w, src + 2);
128 U[w >> 1] = src[4] + 0x80;
129 V[w >> 1] = src[5] + 0x80;
132 Y1 += pic->linesize[0] << 1;
133 Y2 += pic->linesize[0] << 1;
134 U += pic->linesize[1];
135 V += pic->linesize[2];
141 static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
142 const uint8_t *src, int src_size)
148 if (src_size < avctx->width * avctx->height * 3) {
149 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
150 return AVERROR_INVALIDDATA;
153 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
154 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
160 for (h = 0; h < avctx->height; h++) {
161 for (w = 0; w < avctx->width; w++) {
163 U[w] = *src++ ^ 0x80;
164 V[w] = *src++ ^ 0x80;
166 Y += pic->linesize[0];
167 U += pic->linesize[1];
168 V += pic->linesize[2];
174 static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
175 static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
176 static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
178 static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
182 c = get_unary(gb, 0, 8);
184 val = get_bits(gb, 8);
185 memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
188 memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
195 static int check_slice_size(AVCodecContext *avctx,
196 const uint8_t *src, int src_size,
197 int slice_size, int off)
201 if (slice_size > src_size - off) {
202 av_log(avctx, AV_LOG_ERROR,
203 "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
204 slice_size, src_size - off);
205 return AVERROR_INVALIDDATA;
207 if (slice_size <= 16) {
208 av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n",
210 return AVERROR_INVALIDDATA;
213 cur_slice_size = AV_RL32(src + off);
214 if (cur_slice_size != slice_size - 16) {
215 av_log(avctx, AV_LOG_ERROR,
216 "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
217 cur_slice_size, slice_size - 16);
223 static int load_buffer(AVCodecContext *avctx,
224 const uint8_t *src, int src_size,
226 int *nslices, int *off)
228 bytestream2_init(gb, src, src_size);
229 *nslices = bytestream2_get_le16(gb);
230 *off = FFALIGN(*nslices * 4 + 2, 16);
231 if (src_size < *off) {
232 av_log(avctx, AV_LOG_ERROR, "no slice data\n");
233 return AVERROR_INVALIDDATA;
237 avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,
238 avctx->width, avctx->height);
239 return AVERROR_PATCHWELCOME;
245 static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
250 c = get_unary(gb, 0, bits);
252 val = get_bits(gb, bits);
253 memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
256 memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
263 typedef int (*decode_slice_func)(GetBitContext *gb, AVFrame *frame,
264 int line, int height, uint8_t lru[3][8]);
266 typedef void (*setup_lru_func)(uint8_t lru[3][8]);
268 static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
269 const uint8_t *src, int src_size,
270 decode_slice_func decode_slice,
271 setup_lru_func setup_lru,
272 enum AVPixelFormat fmt)
276 int nslices, slice, line = 0;
277 uint32_t off, slice_size;
281 ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
285 avctx->pix_fmt = fmt;
286 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
289 for (slice = 0; slice < nslices; slice++) {
290 slice_size = bytestream2_get_le32(&gb);
294 ret = check_slice_size(avctx, src, src_size, slice_size, off);
298 init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
300 line += decode_slice(&gb2, pic, line, avctx->height - line, lru);
305 if (avctx->height - line) {
306 av_log(avctx, AV_LOG_VERBOSE,
307 "Not enough slice data available, "
308 "cropping the frame by %d pixels\n",
309 avctx->height - line);
310 avctx->height = line;
317 static int dx2_decode_slice_5x5(GetBitContext *gb, AVFrame *frame,
318 int line, int left, uint8_t lru[3][8],
323 int width = frame->width;
324 int stride = frame->linesize[0];
325 uint8_t *dst = frame->data[0] + stride * line;
327 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
328 for (x = 0; x < width; x++) {
329 b = decode_sym_565(gb, lru[0], 5);
330 g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
331 r = decode_sym_565(gb, lru[2], 5);
332 dst[x * 3 + 0] = (r << 3) | (r >> 2);
333 dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
334 dst[x * 3 + 2] = (b << 3) | (b >> 2);
343 static void setup_lru_555(uint8_t lru[3][8])
345 memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
346 memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru));
347 memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
350 static void setup_lru_565(uint8_t lru[3][8])
352 memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
353 memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru));
354 memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
357 static int dx2_decode_slice_555(GetBitContext *gb, AVFrame *frame,
358 int line, int left, uint8_t lru[3][8])
360 return dx2_decode_slice_5x5(gb, frame, line, left, lru, 0);
363 static int dx2_decode_slice_565(GetBitContext *gb, AVFrame *frame,
364 int line, int left, uint8_t lru[3][8])
366 return dx2_decode_slice_5x5(gb, frame, line, left, lru, 1);
369 static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
370 const uint8_t *src, int src_size, int is_565)
372 enum AVPixelFormat fmt = AV_PIX_FMT_RGB24;
374 return dxtory_decode_v2(avctx, pic, src, src_size,
375 dx2_decode_slice_565,
379 return dxtory_decode_v2(avctx, pic, src, src_size,
380 dx2_decode_slice_555,
385 static int dx2_decode_slice_rgb(GetBitContext *gb, AVFrame *frame,
386 int line, int left, uint8_t lru[3][8])
389 int width = frame->width;
390 int stride = frame->linesize[0];
391 uint8_t *dst = frame->data[0] + stride * line;
393 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
394 for (x = 0; x < width; x++) {
395 dst[x * 3 + 0] = decode_sym(gb, lru[0]);
396 dst[x * 3 + 1] = decode_sym(gb, lru[1]);
397 dst[x * 3 + 2] = decode_sym(gb, lru[2]);
406 static void default_setup_lru(uint8_t lru[3][8])
410 for (i = 0; i < 3; i++)
411 memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
414 static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
415 const uint8_t *src, int src_size)
417 return dxtory_decode_v2(avctx, pic, src, src_size,
418 dx2_decode_slice_rgb,
423 static int dx2_decode_slice_410(GetBitContext *gb, AVFrame *frame,
428 int width = frame->width;
430 int ystride = frame->linesize[0];
431 int ustride = frame->linesize[1];
432 int vstride = frame->linesize[2];
434 uint8_t *Y = frame->data[0] + ystride * line;
435 uint8_t *U = frame->data[1] + (ustride >> 2) * line;
436 uint8_t *V = frame->data[2] + (vstride >> 2) * line;
438 for (y = 0; y < left - 3 && get_bits_left(gb) > 16; y += 4) {
439 for (x = 0; x < width; x += 4) {
440 for (j = 0; j < 4; j++)
441 for (i = 0; i < 4; i++)
442 Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
443 U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
444 V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
456 static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
457 const uint8_t *src, int src_size)
459 return dxtory_decode_v2(avctx, pic, src, src_size,
460 dx2_decode_slice_410,
465 static int dx2_decode_slice_420(GetBitContext *gb, AVFrame *frame,
471 int width = frame->width;
473 int ystride = frame->linesize[0];
474 int ustride = frame->linesize[1];
475 int vstride = frame->linesize[2];
477 uint8_t *Y = frame->data[0] + ystride * line;
478 uint8_t *U = frame->data[1] + (ustride >> 1) * line;
479 uint8_t *V = frame->data[2] + (vstride >> 1) * line;
482 for (y = 0; y < left - 1 && get_bits_left(gb) > 16; y += 2) {
483 for (x = 0; x < width; x += 2) {
484 Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
485 Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
486 Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
487 Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
488 U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
489 V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
500 static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
501 const uint8_t *src, int src_size)
503 return dxtory_decode_v2(avctx, pic, src, src_size,
504 dx2_decode_slice_420,
509 static int dx2_decode_slice_444(GetBitContext *gb, AVFrame *frame,
515 int width = frame->width;
517 int ystride = frame->linesize[0];
518 int ustride = frame->linesize[1];
519 int vstride = frame->linesize[2];
521 uint8_t *Y = frame->data[0] + ystride * line;
522 uint8_t *U = frame->data[1] + ustride * line;
523 uint8_t *V = frame->data[2] + vstride * line;
525 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
526 for (x = 0; x < width; x++) {
527 Y[x] = decode_sym(gb, lru[0]);
528 U[x] = decode_sym(gb, lru[1]) ^ 0x80;
529 V[x] = decode_sym(gb, lru[2]) ^ 0x80;
540 static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
541 const uint8_t *src, int src_size)
543 return dxtory_decode_v2(avctx, pic, src, src_size,
544 dx2_decode_slice_444,
549 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
553 const uint8_t *src = avpkt->data;
556 if (avpkt->size < 16) {
557 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
558 return AVERROR_INVALIDDATA;
561 switch (AV_RB32(src)) {
563 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
564 AV_PIX_FMT_BGR24, 3);
567 ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);
570 ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);
573 ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);
576 ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);
579 ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);
582 ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);
585 ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);
588 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
589 AV_PIX_FMT_RGB565LE, 2);
592 ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);
596 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
597 AV_PIX_FMT_RGB555LE, 2);
601 ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);
604 avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src));
605 return AVERROR_PATCHWELCOME;
611 pic->pict_type = AV_PICTURE_TYPE_I;
618 AVCodec ff_dxtory_decoder = {
620 .long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
621 .type = AVMEDIA_TYPE_VIDEO,
622 .id = AV_CODEC_ID_DXTORY,
623 .decode = decode_frame,
624 .capabilities = AV_CODEC_CAP_DR1,