753 lines
23 KiB
C
753 lines
23 KiB
C
/*
|
|
* Dxtory decoder
|
|
*
|
|
* Copyright (c) 2011 Konstantin Shishkov
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#define BITSTREAM_READER_LE
|
|
#include "avcodec.h"
|
|
#include "bytestream.h"
|
|
#include "get_bits.h"
|
|
#include "internal.h"
|
|
#include "unary.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
|
|
static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size,
|
|
int id, int bpp)
|
|
{
|
|
int h;
|
|
uint8_t *dst;
|
|
int ret;
|
|
|
|
if (src_size < avctx->width * avctx->height * bpp) {
|
|
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
avctx->pix_fmt = id;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
dst = pic->data[0];
|
|
for (h = 0; h < avctx->height; h++) {
|
|
memcpy(dst, src, avctx->width * bpp);
|
|
src += avctx->width * bpp;
|
|
dst += pic->linesize[0];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
int h, w;
|
|
uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
|
|
int ret;
|
|
|
|
if (src_size < avctx->width * avctx->height * 18 / 16) {
|
|
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
Y1 = pic->data[0];
|
|
Y2 = pic->data[0] + pic->linesize[0];
|
|
Y3 = pic->data[0] + pic->linesize[0] * 2;
|
|
Y4 = pic->data[0] + pic->linesize[0] * 3;
|
|
U = pic->data[1];
|
|
V = pic->data[2];
|
|
for (h = 0; h < avctx->height; h += 4) {
|
|
for (w = 0; w < avctx->width; w += 4) {
|
|
AV_COPY32(Y1 + w, src);
|
|
AV_COPY32(Y2 + w, src + 4);
|
|
AV_COPY32(Y3 + w, src + 8);
|
|
AV_COPY32(Y4 + w, src + 12);
|
|
U[w >> 2] = src[16] + 0x80;
|
|
V[w >> 2] = src[17] + 0x80;
|
|
src += 18;
|
|
}
|
|
Y1 += pic->linesize[0] << 2;
|
|
Y2 += pic->linesize[0] << 2;
|
|
Y3 += pic->linesize[0] << 2;
|
|
Y4 += pic->linesize[0] << 2;
|
|
U += pic->linesize[1];
|
|
V += pic->linesize[2];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
int h, w;
|
|
uint8_t *Y1, *Y2, *U, *V;
|
|
int ret;
|
|
|
|
if (src_size < avctx->width * avctx->height * 3 / 2) {
|
|
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
Y1 = pic->data[0];
|
|
Y2 = pic->data[0] + pic->linesize[0];
|
|
U = pic->data[1];
|
|
V = pic->data[2];
|
|
for (h = 0; h < avctx->height; h += 2) {
|
|
for (w = 0; w < avctx->width; w += 2) {
|
|
AV_COPY16(Y1 + w, src);
|
|
AV_COPY16(Y2 + w, src + 2);
|
|
U[w >> 1] = src[4] + 0x80;
|
|
V[w >> 1] = src[5] + 0x80;
|
|
src += 6;
|
|
}
|
|
Y1 += pic->linesize[0] << 1;
|
|
Y2 += pic->linesize[0] << 1;
|
|
U += pic->linesize[1];
|
|
V += pic->linesize[2];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
int h, w;
|
|
uint8_t *Y, *U, *V;
|
|
int ret;
|
|
|
|
if (src_size < avctx->width * avctx->height * 3) {
|
|
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
Y = pic->data[0];
|
|
U = pic->data[1];
|
|
V = pic->data[2];
|
|
for (h = 0; h < avctx->height; h++) {
|
|
for (w = 0; w < avctx->width; w++) {
|
|
Y[w] = *src++;
|
|
U[w] = *src++ ^ 0x80;
|
|
V[w] = *src++ ^ 0x80;
|
|
}
|
|
Y += pic->linesize[0];
|
|
U += pic->linesize[1];
|
|
V += pic->linesize[2];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
|
|
const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
|
|
const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
|
|
|
|
static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
|
|
{
|
|
uint8_t c, val;
|
|
|
|
c = get_unary(gb, 0, 8);
|
|
if (!c) {
|
|
val = get_bits(gb, 8);
|
|
memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
|
|
} else {
|
|
val = lru[c - 1];
|
|
memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
|
|
}
|
|
lru[0] = val;
|
|
|
|
return val;
|
|
}
|
|
|
|
static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
|
|
int bits)
|
|
{
|
|
uint8_t c, val;
|
|
|
|
c = get_unary(gb, 0, bits);
|
|
if (!c) {
|
|
val = get_bits(gb, bits);
|
|
memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
|
|
} else {
|
|
val = lru[c - 1];
|
|
memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
|
|
}
|
|
lru[0] = val;
|
|
|
|
return val;
|
|
}
|
|
|
|
static int dx2_decode_slice_565(GetBitContext *gb, int width, int height,
|
|
uint8_t *dst, int stride, int is_565)
|
|
{
|
|
int x, y;
|
|
int r, g, b;
|
|
uint8_t lru[3][8];
|
|
|
|
memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
|
|
memcpy(lru[1], is_565 ? def_lru_565 : def_lru_555, 8 * sizeof(*def_lru));
|
|
memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
|
|
|
|
for (y = 0; y < height; y++) {
|
|
for (x = 0; x < width; x++) {
|
|
b = decode_sym_565(gb, lru[0], 5);
|
|
g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
|
|
r = decode_sym_565(gb, lru[2], 5);
|
|
dst[x * 3 + 0] = (r << 3) | (r >> 2);
|
|
dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
|
|
dst[x * 3 + 2] = (b << 3) | (b >> 2);
|
|
}
|
|
|
|
dst += stride;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size, int is_565)
|
|
{
|
|
GetByteContext gb;
|
|
GetBitContext gb2;
|
|
int nslices, slice, slice_height;
|
|
uint32_t off, slice_size;
|
|
uint8_t *dst;
|
|
int ret;
|
|
|
|
bytestream2_init(&gb, src, src_size);
|
|
nslices = bytestream2_get_le16(&gb);
|
|
off = FFALIGN(nslices * 4 + 2, 16);
|
|
if (src_size < off) {
|
|
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!nslices || avctx->height % nslices) {
|
|
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
|
|
avctx->width, avctx->height);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
slice_height = avctx->height / nslices;
|
|
avctx->pix_fmt = AV_PIX_FMT_RGB24;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
dst = pic->data[0];
|
|
for (slice = 0; slice < nslices; slice++) {
|
|
slice_size = bytestream2_get_le32(&gb);
|
|
if (slice_size > src_size - off) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"invalid slice size %d (only %d bytes left)\n",
|
|
slice_size, src_size - off);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (slice_size <= 16) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n", slice_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (AV_RL32(src + off) != slice_size - 16) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Slice sizes mismatch: got %d instead of %d\n",
|
|
AV_RL32(src + off), slice_size - 16);
|
|
}
|
|
init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
|
|
dx2_decode_slice_565(&gb2, avctx->width, slice_height, dst,
|
|
pic->linesize[0], is_565);
|
|
|
|
dst += pic->linesize[0] * slice_height;
|
|
off += slice_size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dx2_decode_slice_rgb(GetBitContext *gb, int width, int height,
|
|
uint8_t *dst, int stride)
|
|
{
|
|
int x, y, i;
|
|
uint8_t lru[3][8];
|
|
|
|
for (i = 0; i < 3; i++)
|
|
memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
|
|
|
|
for (y = 0; y < height; y++) {
|
|
for (x = 0; x < width; x++) {
|
|
dst[x * 3 + 0] = decode_sym(gb, lru[0]);
|
|
dst[x * 3 + 1] = decode_sym(gb, lru[1]);
|
|
dst[x * 3 + 2] = decode_sym(gb, lru[2]);
|
|
}
|
|
|
|
dst += stride;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
GetByteContext gb;
|
|
GetBitContext gb2;
|
|
int nslices, slice, slice_height;
|
|
uint32_t off, slice_size;
|
|
uint8_t *dst;
|
|
int ret;
|
|
|
|
bytestream2_init(&gb, src, src_size);
|
|
nslices = bytestream2_get_le16(&gb);
|
|
off = FFALIGN(nslices * 4 + 2, 16);
|
|
if (src_size < off) {
|
|
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!nslices || avctx->height % nslices) {
|
|
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
|
|
avctx->width, avctx->height);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
slice_height = avctx->height / nslices;
|
|
avctx->pix_fmt = AV_PIX_FMT_BGR24;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
dst = pic->data[0];
|
|
for (slice = 0; slice < nslices; slice++) {
|
|
slice_size = bytestream2_get_le32(&gb);
|
|
if (slice_size > src_size - off) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"invalid slice size %d (only %d bytes left)\n",
|
|
slice_size, src_size - off);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (slice_size <= 16) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n", slice_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (AV_RL32(src + off) != slice_size - 16) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Slice sizes mismatch: got %d instead of %d\n",
|
|
AV_RL32(src + off), slice_size - 16);
|
|
}
|
|
init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
|
|
dx2_decode_slice_rgb(&gb2, avctx->width, slice_height, dst,
|
|
pic->linesize[0]);
|
|
|
|
dst += pic->linesize[0] * slice_height;
|
|
off += slice_size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dx2_decode_slice_410(GetBitContext *gb, int width, int height,
|
|
uint8_t *Y, uint8_t *U, uint8_t *V,
|
|
int ystride, int ustride, int vstride)
|
|
{
|
|
int x, y, i, j;
|
|
uint8_t lru[3][8];
|
|
|
|
for (i = 0; i < 3; i++)
|
|
memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
|
|
|
|
for (y = 0; y < height; y += 4) {
|
|
for (x = 0; x < width; x += 4) {
|
|
for (j = 0; j < 4; j++)
|
|
for (i = 0; i < 4; i++)
|
|
Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
|
|
U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
|
|
V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
|
|
}
|
|
|
|
Y += ystride << 2;
|
|
U += ustride;
|
|
V += vstride;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
GetByteContext gb;
|
|
GetBitContext gb2;
|
|
int nslices, slice, slice_height, ref_slice_height;
|
|
int cur_y, next_y;
|
|
uint32_t off, slice_size;
|
|
uint8_t *Y, *U, *V;
|
|
int ret;
|
|
|
|
bytestream2_init(&gb, src, src_size);
|
|
nslices = bytestream2_get_le16(&gb);
|
|
off = FFALIGN(nslices * 4 + 2, 16);
|
|
if (src_size < off) {
|
|
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!nslices || avctx->height % nslices) {
|
|
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
|
|
avctx->width, avctx->height);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
ref_slice_height = avctx->height / nslices;
|
|
if ((avctx->width & 3) || (avctx->height & 3)) {
|
|
avpriv_request_sample(avctx, "Frame dimensions %dx%d",
|
|
avctx->width, avctx->height);
|
|
}
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
Y = pic->data[0];
|
|
U = pic->data[1];
|
|
V = pic->data[2];
|
|
|
|
cur_y = 0;
|
|
next_y = ref_slice_height;
|
|
for (slice = 0; slice < nslices; slice++) {
|
|
slice_size = bytestream2_get_le32(&gb);
|
|
slice_height = (next_y & ~3) - (cur_y & ~3);
|
|
if (slice_size > src_size - off) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"invalid slice size %d (only %d bytes left)\n",
|
|
slice_size, src_size - off);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (slice_size <= 16) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n", slice_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (AV_RL32(src + off) != slice_size - 16) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Slice sizes mismatch: got %d instead of %d\n",
|
|
AV_RL32(src + off), slice_size - 16);
|
|
}
|
|
init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
|
|
dx2_decode_slice_410(&gb2, avctx->width, slice_height, Y, U, V,
|
|
pic->linesize[0], pic->linesize[1],
|
|
pic->linesize[2]);
|
|
|
|
Y += pic->linesize[0] * slice_height;
|
|
U += pic->linesize[1] * (slice_height >> 2);
|
|
V += pic->linesize[2] * (slice_height >> 2);
|
|
off += slice_size;
|
|
cur_y = next_y;
|
|
next_y += ref_slice_height;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dx2_decode_slice_420(GetBitContext *gb, int width, int height,
|
|
uint8_t *Y, uint8_t *U, uint8_t *V,
|
|
int ystride, int ustride, int vstride)
|
|
{
|
|
int x, y, i;
|
|
uint8_t lru[3][8];
|
|
|
|
for (i = 0; i < 3; i++)
|
|
memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
|
|
|
|
for (y = 0; y < height; y+=2) {
|
|
for (x = 0; x < width; x += 2) {
|
|
Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
|
|
Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
|
|
Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
|
|
Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
|
|
U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
|
|
V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
|
|
}
|
|
|
|
Y += ystride << 1;
|
|
U += ustride;
|
|
V += vstride;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
GetByteContext gb;
|
|
GetBitContext gb2;
|
|
int nslices, slice, slice_height, ref_slice_height;
|
|
int cur_y, next_y;
|
|
uint32_t off, slice_size;
|
|
uint8_t *Y, *U, *V;
|
|
int ret;
|
|
|
|
bytestream2_init(&gb, src, src_size);
|
|
nslices = bytestream2_get_le16(&gb);
|
|
off = FFALIGN(nslices * 4 + 2, 16);
|
|
if (src_size < off) {
|
|
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!nslices || avctx->height % nslices) {
|
|
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
|
|
avctx->width, avctx->height);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
ref_slice_height = avctx->height / nslices;
|
|
if ((avctx->width & 1) || (avctx->height & 1)) {
|
|
avpriv_request_sample(avctx, "Frame dimensions %dx%d",
|
|
avctx->width, avctx->height);
|
|
}
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
Y = pic->data[0];
|
|
U = pic->data[1];
|
|
V = pic->data[2];
|
|
|
|
cur_y = 0;
|
|
next_y = ref_slice_height;
|
|
for (slice = 0; slice < nslices; slice++) {
|
|
slice_size = bytestream2_get_le32(&gb);
|
|
slice_height = (next_y & ~1) - (cur_y & ~1);
|
|
if (slice_size > src_size - off) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"invalid slice size %d (only %d bytes left)\n",
|
|
slice_size, src_size - off);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (slice_size <= 16) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n", slice_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (AV_RL32(src + off) != slice_size - 16) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Slice sizes mismatch: got %d instead of %d\n",
|
|
AV_RL32(src + off), slice_size - 16);
|
|
}
|
|
init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
|
|
dx2_decode_slice_420(&gb2, avctx->width, slice_height, Y, U, V,
|
|
pic->linesize[0], pic->linesize[1],
|
|
pic->linesize[2]);
|
|
|
|
Y += pic->linesize[0] * slice_height;
|
|
U += pic->linesize[1] * (slice_height >> 1);
|
|
V += pic->linesize[2] * (slice_height >> 1);
|
|
off += slice_size;
|
|
cur_y = next_y;
|
|
next_y += ref_slice_height;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dx2_decode_slice_444(GetBitContext *gb, int width, int height,
|
|
uint8_t *Y, uint8_t *U, uint8_t *V,
|
|
int ystride, int ustride, int vstride)
|
|
{
|
|
int x, y, i;
|
|
uint8_t lru[3][8];
|
|
|
|
for (i = 0; i < 3; i++)
|
|
memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
|
|
|
|
for (y = 0; y < height; y++) {
|
|
for (x = 0; x < width; x++) {
|
|
Y[x] = decode_sym(gb, lru[0]);
|
|
U[x] = decode_sym(gb, lru[1]) ^ 0x80;
|
|
V[x] = decode_sym(gb, lru[2]) ^ 0x80;
|
|
}
|
|
|
|
Y += ystride;
|
|
U += ustride;
|
|
V += vstride;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
GetByteContext gb;
|
|
GetBitContext gb2;
|
|
int nslices, slice, slice_height;
|
|
uint32_t off, slice_size;
|
|
uint8_t *Y, *U, *V;
|
|
int ret;
|
|
|
|
bytestream2_init(&gb, src, src_size);
|
|
nslices = bytestream2_get_le16(&gb);
|
|
off = FFALIGN(nslices * 4 + 2, 16);
|
|
if (src_size < off) {
|
|
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!nslices || avctx->height % nslices) {
|
|
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
|
|
avctx->width, avctx->height);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
slice_height = avctx->height / nslices;
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
|
|
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
Y = pic->data[0];
|
|
U = pic->data[1];
|
|
V = pic->data[2];
|
|
|
|
for (slice = 0; slice < nslices; slice++) {
|
|
slice_size = bytestream2_get_le32(&gb);
|
|
if (slice_size > src_size - off) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"invalid slice size %d (only %d bytes left)\n",
|
|
slice_size, src_size - off);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (slice_size <= 16) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n", slice_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (AV_RL32(src + off) != slice_size - 16) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Slice sizes mismatch: got %d instead of %d\n",
|
|
AV_RL32(src + off), slice_size - 16);
|
|
}
|
|
init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
|
|
dx2_decode_slice_444(&gb2, avctx->width, slice_height, Y, U, V,
|
|
pic->linesize[0], pic->linesize[1],
|
|
pic->linesize[2]);
|
|
|
|
Y += pic->linesize[0] * slice_height;
|
|
U += pic->linesize[1] * slice_height;
|
|
V += pic->linesize[2] * slice_height;
|
|
off += slice_size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
|
|
AVPacket *avpkt)
|
|
{
|
|
AVFrame *pic = data;
|
|
const uint8_t *src = avpkt->data;
|
|
int ret;
|
|
|
|
if (avpkt->size < 16) {
|
|
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
switch (AV_RB32(src)) {
|
|
case 0x01000001:
|
|
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
|
|
AV_PIX_FMT_BGR24, 3);
|
|
break;
|
|
case 0x01000009:
|
|
ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x02000001:
|
|
ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x02000009:
|
|
ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x03000001:
|
|
ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x03000009:
|
|
ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x04000001:
|
|
ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x04000009:
|
|
ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x17000001:
|
|
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
|
|
AV_PIX_FMT_RGB565LE, 2);
|
|
break;
|
|
case 0x17000009:
|
|
ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);
|
|
break;
|
|
case 0x18000001:
|
|
case 0x19000001:
|
|
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
|
|
AV_PIX_FMT_RGB555LE, 2);
|
|
break;
|
|
case 0x18000009:
|
|
case 0x19000009:
|
|
ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);
|
|
break;
|
|
default:
|
|
avpriv_request_sample(avctx, "Frame header %X", AV_RB32(src));
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
pic->pict_type = AV_PICTURE_TYPE_I;
|
|
pic->key_frame = 1;
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
AVCodec ff_dxtory_decoder = {
|
|
.name = "dxtory",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_DXTORY,
|
|
.decode = decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
};
|