4
* Copyright (c) 2011 Konstantin Shishkov
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* This file is part of FFmpeg.
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* FFmpeg is free software; you can redistribute it and/or
9
* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#define BITSTREAM_READER_LE
27
#include "bytestream.h"
31
#include "libavutil/common.h"
32
#include "libavutil/intreadwrite.h"
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static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size,
42
if (src_size < avctx->width * avctx->height * (int64_t)bpp) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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for (h = 0; h < avctx->height; h++) {
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memcpy(dst, src, avctx->width * bpp);
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src += avctx->width * bpp;
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dst += pic->linesize[0];
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static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size)
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uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
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if (src_size < avctx->width * avctx->height * 9L / 8) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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avctx->pix_fmt = AV_PIX_FMT_YUV410P;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
78
Y2 = pic->data[0] + pic->linesize[0];
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Y3 = pic->data[0] + pic->linesize[0] * 2;
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Y4 = pic->data[0] + pic->linesize[0] * 3;
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for (h = 0; h < avctx->height; h += 4) {
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for (w = 0; w < avctx->width; w += 4) {
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AV_COPY32(Y1 + w, src);
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AV_COPY32(Y2 + w, src + 4);
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AV_COPY32(Y3 + w, src + 8);
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AV_COPY32(Y4 + w, src + 12);
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U[w >> 2] = src[16] + 0x80;
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V[w >> 2] = src[17] + 0x80;
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Y1 += pic->linesize[0] << 2;
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Y2 += pic->linesize[0] << 2;
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Y3 += pic->linesize[0] << 2;
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Y4 += pic->linesize[0] << 2;
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U += pic->linesize[1];
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V += pic->linesize[2];
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static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size)
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uint8_t *Y1, *Y2, *U, *V;
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if (src_size < avctx->width * avctx->height * 3L / 2) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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Y2 = pic->data[0] + pic->linesize[0];
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for (h = 0; h < avctx->height; h += 2) {
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for (w = 0; w < avctx->width; w += 2) {
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AV_COPY16(Y1 + w, src);
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AV_COPY16(Y2 + w, src + 2);
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U[w >> 1] = src[4] + 0x80;
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V[w >> 1] = src[5] + 0x80;
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Y1 += pic->linesize[0] << 1;
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Y2 += pic->linesize[0] << 1;
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U += pic->linesize[1];
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V += pic->linesize[2];
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static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size)
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if (src_size < avctx->width * avctx->height * 3L) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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avctx->pix_fmt = AV_PIX_FMT_YUV444P;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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for (h = 0; h < avctx->height; h++) {
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for (w = 0; w < avctx->width; w++) {
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U[w] = *src++ ^ 0x80;
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V[w] = *src++ ^ 0x80;
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Y += pic->linesize[0];
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U += pic->linesize[1];
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V += pic->linesize[2];
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static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
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static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
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static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
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static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
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c = get_unary(gb, 0, 8);
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val = get_bits(gb, 8);
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memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
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memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
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static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
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c = get_unary(gb, 0, bits);
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val = get_bits(gb, bits);
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memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
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memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
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static int dx2_decode_slice_565(GetBitContext *gb, int width, int height,
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uint8_t *dst, int stride, int is_565)
220
memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
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memcpy(lru[1], is_565 ? def_lru_565 : def_lru_555, 8 * sizeof(*def_lru));
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memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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b = decode_sym_565(gb, lru[0], 5);
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g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
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r = decode_sym_565(gb, lru[2], 5);
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dst[x * 3 + 0] = (r << 3) | (r >> 2);
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dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
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dst[x * 3 + 2] = (b << 3) | (b >> 2);
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static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size, int is_565)
245
int nslices, slice, slice_height;
246
uint32_t off, slice_size;
250
bytestream2_init(&gb, src, src_size);
251
nslices = bytestream2_get_le16(&gb);
252
off = FFALIGN(nslices * 4 + 2, 16);
253
if (src_size < off) {
254
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
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return AVERROR_INVALIDDATA;
258
if (!nslices || avctx->height % nslices) {
259
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
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avctx->width, avctx->height);
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return AVERROR_PATCHWELCOME;
264
slice_height = avctx->height / nslices;
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avctx->pix_fmt = AV_PIX_FMT_RGB24;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
270
for (slice = 0; slice < nslices; slice++) {
271
slice_size = bytestream2_get_le32(&gb);
272
if (slice_size > src_size - off) {
273
av_log(avctx, AV_LOG_ERROR,
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"invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
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slice_size, src_size - off);
276
return AVERROR_INVALIDDATA;
278
if (slice_size <= 16) {
279
av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size);
280
return AVERROR_INVALIDDATA;
283
if (AV_RL32(src + off) != slice_size - 16) {
284
av_log(avctx, AV_LOG_ERROR,
285
"Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
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AV_RL32(src + off), slice_size - 16);
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init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
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dx2_decode_slice_565(&gb2, avctx->width, slice_height, dst,
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pic->linesize[0], is_565);
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dst += pic->linesize[0] * slice_height;
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static int dx2_decode_slice_rgb(GetBitContext *gb, int width, int height,
300
uint8_t *dst, int stride)
305
for (i = 0; i < 3; i++)
306
memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
308
for (y = 0; y < height; y++) {
309
for (x = 0; x < width; x++) {
310
dst[x * 3 + 0] = decode_sym(gb, lru[0]);
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dst[x * 3 + 1] = decode_sym(gb, lru[1]);
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dst[x * 3 + 2] = decode_sym(gb, lru[2]);
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static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
322
const uint8_t *src, int src_size)
326
int nslices, slice, slice_height;
327
uint32_t off, slice_size;
331
bytestream2_init(&gb, src, src_size);
332
nslices = bytestream2_get_le16(&gb);
333
off = FFALIGN(nslices * 4 + 2, 16);
334
if (src_size < off) {
335
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
336
return AVERROR_INVALIDDATA;
339
if (!nslices || avctx->height % nslices) {
340
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
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avctx->width, avctx->height);
342
return AVERROR_PATCHWELCOME;
345
slice_height = avctx->height / nslices;
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avctx->pix_fmt = AV_PIX_FMT_BGR24;
347
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
351
for (slice = 0; slice < nslices; slice++) {
352
slice_size = bytestream2_get_le32(&gb);
353
if (slice_size > src_size - off) {
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av_log(avctx, AV_LOG_ERROR,
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"invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
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slice_size, src_size - off);
357
return AVERROR_INVALIDDATA;
359
if (slice_size <= 16) {
360
av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n",
362
return AVERROR_INVALIDDATA;
365
if (AV_RL32(src + off) != slice_size - 16) {
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av_log(avctx, AV_LOG_ERROR,
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"Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
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AV_RL32(src + off), slice_size - 16);
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init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
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dx2_decode_slice_rgb(&gb2, avctx->width, slice_height, dst,
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dst += pic->linesize[0] * slice_height;
381
static int dx2_decode_slice_410(GetBitContext *gb, int width, int height,
382
uint8_t *Y, uint8_t *U, uint8_t *V,
383
int ystride, int ustride, int vstride)
388
for (i = 0; i < 3; i++)
389
memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
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for (y = 0; y < height; y += 4) {
392
for (x = 0; x < width; x += 4) {
393
for (j = 0; j < 4; j++)
394
for (i = 0; i < 4; i++)
395
Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
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U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
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V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
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static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
409
const uint8_t *src, int src_size)
413
int nslices, slice, slice_height, ref_slice_height;
415
uint32_t off, slice_size;
419
bytestream2_init(&gb, src, src_size);
420
nslices = bytestream2_get_le16(&gb);
421
off = FFALIGN(nslices * 4 + 2, 16);
422
if (src_size < off) {
423
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
424
return AVERROR_INVALIDDATA;
427
if (!nslices || avctx->height % nslices) {
428
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
429
avctx->width, avctx->height);
430
return AVERROR_PATCHWELCOME;
433
ref_slice_height = avctx->height / nslices;
434
if ((avctx->width & 3) || (avctx->height & 3)) {
435
avpriv_request_sample(avctx, "Frame dimensions %dx%d",
436
avctx->width, avctx->height);
439
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
440
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
448
next_y = ref_slice_height;
449
for (slice = 0; slice < nslices; slice++) {
450
slice_size = bytestream2_get_le32(&gb);
451
slice_height = (next_y & ~3) - (cur_y & ~3);
452
if (slice_size > src_size - off) {
453
av_log(avctx, AV_LOG_ERROR,
454
"invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
455
slice_size, src_size - off);
456
return AVERROR_INVALIDDATA;
458
if (slice_size <= 16) {
459
av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size);
460
return AVERROR_INVALIDDATA;
463
if (AV_RL32(src + off) != slice_size - 16) {
464
av_log(avctx, AV_LOG_ERROR,
465
"Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
466
AV_RL32(src + off), slice_size - 16);
468
init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
469
dx2_decode_slice_410(&gb2, avctx->width, slice_height, Y, U, V,
470
pic->linesize[0], pic->linesize[1],
473
Y += pic->linesize[0] * slice_height;
474
U += pic->linesize[1] * (slice_height >> 2);
475
V += pic->linesize[2] * (slice_height >> 2);
478
next_y += ref_slice_height;
484
static int dx2_decode_slice_420(GetBitContext *gb, int width, int height,
485
uint8_t *Y, uint8_t *U, uint8_t *V,
486
int ystride, int ustride, int vstride)
491
for (i = 0; i < 3; i++)
492
memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
494
for (y = 0; y < height; y+=2) {
495
for (x = 0; x < width; x += 2) {
496
Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
497
Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
498
Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
499
Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
500
U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
501
V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
512
static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
513
const uint8_t *src, int src_size)
517
int nslices, slice, slice_height, ref_slice_height;
519
uint32_t off, slice_size;
523
bytestream2_init(&gb, src, src_size);
524
nslices = bytestream2_get_le16(&gb);
525
off = FFALIGN(nslices * 4 + 2, 16);
526
if (src_size < off) {
527
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
528
return AVERROR_INVALIDDATA;
531
if (!nslices || avctx->height % nslices) {
532
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
533
avctx->width, avctx->height);
534
return AVERROR_PATCHWELCOME;
537
ref_slice_height = avctx->height / nslices;
538
if ((avctx->width & 1) || (avctx->height & 1)) {
539
avpriv_request_sample(avctx, "Frame dimensions %dx%d",
540
avctx->width, avctx->height);
543
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
544
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
552
next_y = ref_slice_height;
553
for (slice = 0; slice < nslices; slice++) {
554
slice_size = bytestream2_get_le32(&gb);
555
slice_height = (next_y & ~1) - (cur_y & ~1);
556
if (slice_size > src_size - off) {
557
av_log(avctx, AV_LOG_ERROR,
558
"invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
559
slice_size, src_size - off);
560
return AVERROR_INVALIDDATA;
562
if (slice_size <= 16) {
563
av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size);
564
return AVERROR_INVALIDDATA;
567
if (AV_RL32(src + off) != slice_size - 16) {
568
av_log(avctx, AV_LOG_ERROR,
569
"Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
570
AV_RL32(src + off), slice_size - 16);
572
init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
573
dx2_decode_slice_420(&gb2, avctx->width, slice_height, Y, U, V,
574
pic->linesize[0], pic->linesize[1],
577
Y += pic->linesize[0] * slice_height;
578
U += pic->linesize[1] * (slice_height >> 1);
579
V += pic->linesize[2] * (slice_height >> 1);
582
next_y += ref_slice_height;
588
static int dx2_decode_slice_444(GetBitContext *gb, int width, int height,
589
uint8_t *Y, uint8_t *U, uint8_t *V,
590
int ystride, int ustride, int vstride)
595
for (i = 0; i < 3; i++)
596
memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
598
for (y = 0; y < height; y++) {
599
for (x = 0; x < width; x++) {
600
Y[x] = decode_sym(gb, lru[0]);
601
U[x] = decode_sym(gb, lru[1]) ^ 0x80;
602
V[x] = decode_sym(gb, lru[2]) ^ 0x80;
613
static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
614
const uint8_t *src, int src_size)
618
int nslices, slice, slice_height;
619
uint32_t off, slice_size;
623
bytestream2_init(&gb, src, src_size);
624
nslices = bytestream2_get_le16(&gb);
625
off = FFALIGN(nslices * 4 + 2, 16);
626
if (src_size < off) {
627
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
628
return AVERROR_INVALIDDATA;
631
if (!nslices || avctx->height % nslices) {
632
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
633
avctx->width, avctx->height);
634
return AVERROR_PATCHWELCOME;
637
slice_height = avctx->height / nslices;
639
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
640
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
647
for (slice = 0; slice < nslices; slice++) {
648
slice_size = bytestream2_get_le32(&gb);
649
if (slice_size > src_size - off) {
650
av_log(avctx, AV_LOG_ERROR,
651
"invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
652
slice_size, src_size - off);
653
return AVERROR_INVALIDDATA;
655
if (slice_size <= 16) {
656
av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size);
657
return AVERROR_INVALIDDATA;
660
if (AV_RL32(src + off) != slice_size - 16) {
661
av_log(avctx, AV_LOG_ERROR,
662
"Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
663
AV_RL32(src + off), slice_size - 16);
665
init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
666
dx2_decode_slice_444(&gb2, avctx->width, slice_height, Y, U, V,
667
pic->linesize[0], pic->linesize[1],
670
Y += pic->linesize[0] * slice_height;
671
U += pic->linesize[1] * slice_height;
672
V += pic->linesize[2] * slice_height;
679
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
683
const uint8_t *src = avpkt->data;
686
if (avpkt->size < 16) {
687
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
688
return AVERROR_INVALIDDATA;
691
switch (AV_RB32(src)) {
693
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
694
AV_PIX_FMT_BGR24, 3);
697
ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);
700
ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);
703
ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);
706
ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);
709
ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);
712
ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);
715
ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);
718
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
719
AV_PIX_FMT_RGB565LE, 2);
722
ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);
726
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
727
AV_PIX_FMT_RGB555LE, 2);
731
ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);
734
avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src));
735
return AVERROR_PATCHWELCOME;
741
pic->pict_type = AV_PICTURE_TYPE_I;
748
AVCodec ff_dxtory_decoder = {
750
.long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
751
.type = AVMEDIA_TYPE_VIDEO,
752
.id = AV_CODEC_ID_DXTORY,
753
.decode = decode_frame,
754
.capabilities = CODEC_CAP_DR1,