| /* | |
| * Dxtory decoder | |
| * | |
| * Copyright (c) 2011 Konstantin Shishkov | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg 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. | |
| * | |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| #include <inttypes.h> | |
| #include "libavutil/common.h" | |
| #include "libavutil/intreadwrite.h" | |
| #define BITSTREAM_READER_LE | |
| #include "avcodec.h" | |
| #include "bytestream.h" | |
| #include "codec_internal.h" | |
| #include "get_bits.h" | |
| #include "unary.h" | |
| #include "thread.h" | |
| static int64_t get_raw_size(enum AVPixelFormat fmt, int width, int height) | |
| { | |
| switch (fmt) { | |
| case AV_PIX_FMT_RGB555LE: | |
| case AV_PIX_FMT_RGB565LE: | |
| return width * height * 2LL; | |
| case AV_PIX_FMT_RGB24: | |
| case AV_PIX_FMT_BGR24: | |
| case AV_PIX_FMT_YUV444P: | |
| return width * height * 3LL; | |
| case AV_PIX_FMT_YUV420P: | |
| return (int64_t)(width * height) + 2 * AV_CEIL_RSHIFT(width, 1) * AV_CEIL_RSHIFT(height, 1); | |
| case AV_PIX_FMT_YUV410P: | |
| return (int64_t)(width * height) + 2 * AV_CEIL_RSHIFT(width, 2) * AV_CEIL_RSHIFT(height, 2); | |
| } | |
| return 0; | |
| } | |
| static void do_vflip(AVCodecContext *avctx, AVFrame *pic, int vflip) | |
| { | |
| if (!vflip) | |
| return; | |
| switch (pic->format) { | |
| case AV_PIX_FMT_YUV444P: | |
| pic->data[1] += (avctx->height - 1) * pic->linesize[1]; | |
| pic->linesize[1] = -pic->linesize[1]; | |
| pic->data[2] += (avctx->height - 1) * pic->linesize[2]; | |
| pic->linesize[2] = -pic->linesize[2]; | |
| case AV_PIX_FMT_RGB555LE: | |
| case AV_PIX_FMT_RGB565LE: | |
| case AV_PIX_FMT_BGR24: | |
| case AV_PIX_FMT_RGB24: | |
| pic->data[0] += (avctx->height - 1) * pic->linesize[0]; | |
| pic->linesize[0] = -pic->linesize[0]; | |
| break; | |
| case AV_PIX_FMT_YUV410P: | |
| pic->data[0] += (avctx->height - 1) * pic->linesize[0]; | |
| pic->linesize[0] = -pic->linesize[0]; | |
| pic->data[1] += (AV_CEIL_RSHIFT(avctx->height, 2) - 1) * pic->linesize[1]; | |
| pic->linesize[1] = -pic->linesize[1]; | |
| pic->data[2] += (AV_CEIL_RSHIFT(avctx->height, 2) - 1) * pic->linesize[2]; | |
| pic->linesize[2] = -pic->linesize[2]; | |
| break; | |
| case AV_PIX_FMT_YUV420P: | |
| pic->data[0] += (avctx->height - 1) * pic->linesize[0]; | |
| pic->linesize[0] = -pic->linesize[0]; | |
| pic->data[1] += (AV_CEIL_RSHIFT(avctx->height, 1) - 1) * pic->linesize[1]; | |
| pic->linesize[1] = -pic->linesize[1]; | |
| pic->data[2] += (AV_CEIL_RSHIFT(avctx->height, 1) - 1) * pic->linesize[2]; | |
| pic->linesize[2] = -pic->linesize[2]; | |
| break; | |
| } | |
| } | |
| static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| int id, int bpp, uint32_t vflipped) | |
| { | |
| int h; | |
| uint8_t *dst; | |
| int ret; | |
| if (src_size < get_raw_size(id, avctx->width, avctx->height)) { | |
| av_log(avctx, AV_LOG_ERROR, "packet too small\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| avctx->pix_fmt = id; | |
| if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) | |
| return ret; | |
| do_vflip(avctx, pic, vflipped); | |
| 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]; | |
| } | |
| do_vflip(avctx, pic, vflipped); | |
| return 0; | |
| } | |
| static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| uint32_t vflipped) | |
| { | |
| int h, w; | |
| uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V; | |
| int height, width, hmargin, vmargin; | |
| int huvborder; | |
| int ret; | |
| if (src_size < get_raw_size(AV_PIX_FMT_YUV410P, avctx->width, avctx->height)) { | |
| av_log(avctx, AV_LOG_ERROR, "packet too small\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| avctx->pix_fmt = AV_PIX_FMT_YUV410P; | |
| if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) | |
| return ret; | |
| do_vflip(avctx, pic, vflipped); | |
| height = avctx->height & ~3; | |
| width = avctx->width & ~3; | |
| hmargin = avctx->width - width; | |
| vmargin = avctx->height - height; | |
| huvborder = AV_CEIL_RSHIFT(avctx->width, 2) - 1; | |
| 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 < height; h += 4) { | |
| for (w = 0; w < width; w += 4) { | |
| AV_COPY32U(Y1 + w, src); | |
| AV_COPY32U(Y2 + w, src + 4); | |
| AV_COPY32U(Y3 + w, src + 8); | |
| AV_COPY32U(Y4 + w, src + 12); | |
| U[w >> 2] = src[16] + 0x80; | |
| V[w >> 2] = src[17] + 0x80; | |
| src += 18; | |
| } | |
| if (hmargin) { | |
| for (w = 0; w < hmargin; w++) { | |
| Y1[width + w] = src[w]; | |
| Y2[width + w] = src[w + hmargin * 1]; | |
| Y3[width + w] = src[w + hmargin * 2]; | |
| Y4[width + w] = src[w + hmargin * 3]; | |
| } | |
| src += 4 * hmargin; | |
| U[huvborder] = src[0] + 0x80; | |
| V[huvborder] = src[1] + 0x80; | |
| src += 2; | |
| } | |
| Y1 += pic->linesize[0] * 4; | |
| Y2 += pic->linesize[0] * 4; | |
| Y3 += pic->linesize[0] * 4; | |
| Y4 += pic->linesize[0] * 4; | |
| U += pic->linesize[1]; | |
| V += pic->linesize[2]; | |
| } | |
| if (vmargin) { | |
| for (w = 0; w < width; w += 4) { | |
| AV_COPY32U(Y1 + w, src); | |
| if (vmargin > 1) | |
| AV_COPY32U(Y2 + w, src + 4); | |
| if (vmargin > 2) | |
| AV_COPY32U(Y3 + w, src + 8); | |
| src += 4 * vmargin; | |
| U[w >> 2] = src[0] + 0x80; | |
| V[w >> 2] = src[1] + 0x80; | |
| src += 2; | |
| } | |
| if (hmargin) { | |
| for (w = 0; w < hmargin; w++) { | |
| AV_COPY32U(Y1 + w, src); | |
| if (vmargin > 1) | |
| AV_COPY32U(Y2 + w, src + 4); | |
| if (vmargin > 2) | |
| AV_COPY32U(Y3 + w, src + 8); | |
| src += 4 * vmargin; | |
| } | |
| U[huvborder] = src[0] + 0x80; | |
| V[huvborder] = src[1] + 0x80; | |
| src += 2; | |
| } | |
| } | |
| do_vflip(avctx, pic, vflipped); | |
| return 0; | |
| } | |
| static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| uint32_t vflipped) | |
| { | |
| int h, w; | |
| uint8_t *Y1, *Y2, *U, *V; | |
| int height, width, hmargin, vmargin; | |
| int huvborder; | |
| int ret; | |
| if (src_size < get_raw_size(AV_PIX_FMT_YUV420P, avctx->width, avctx->height)) { | |
| av_log(avctx, AV_LOG_ERROR, "packet too small\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
| if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) | |
| return ret; | |
| do_vflip(avctx, pic, vflipped); | |
| height = avctx->height & ~1; | |
| width = avctx->width & ~1; | |
| hmargin = avctx->width - width; | |
| vmargin = avctx->height - height; | |
| huvborder = AV_CEIL_RSHIFT(avctx->width, 1) - 1; | |
| Y1 = pic->data[0]; | |
| Y2 = pic->data[0] + pic->linesize[0]; | |
| U = pic->data[1]; | |
| V = pic->data[2]; | |
| for (h = 0; h < height; h += 2) { | |
| for (w = 0; w < 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; | |
| } | |
| if (hmargin) { | |
| Y1[width + 1] = src[0]; | |
| Y2[width + 1] = src[1]; | |
| U[huvborder] = src[2] + 0x80; | |
| V[huvborder] = src[3] + 0x80; | |
| src += 4; | |
| } | |
| Y1 += pic->linesize[0] * 2; | |
| Y2 += pic->linesize[0] * 2; | |
| U += pic->linesize[1]; | |
| V += pic->linesize[2]; | |
| } | |
| if (vmargin) { | |
| for (w = 0; w < width; w += 2) { | |
| AV_COPY16U(Y1 + w, src); | |
| U[w >> 1] = src[0] + 0x80; | |
| V[w >> 1] = src[1] + 0x80; | |
| src += 4; | |
| } | |
| if (hmargin) { | |
| Y1[w] = src[0]; | |
| U[huvborder] = src[1] + 0x80; | |
| V[huvborder] = src[2] + 0x80; | |
| src += 3; | |
| } | |
| } | |
| do_vflip(avctx, pic, vflipped); | |
| return 0; | |
| } | |
| static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| uint32_t vflipped) | |
| { | |
| int h, w; | |
| uint8_t *Y, *U, *V; | |
| int ret; | |
| if (src_size < get_raw_size(AV_PIX_FMT_YUV444P, avctx->width, avctx->height)) { | |
| av_log(avctx, AV_LOG_ERROR, "packet too small\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| avctx->pix_fmt = AV_PIX_FMT_YUV444P; | |
| if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) | |
| return ret; | |
| do_vflip(avctx, pic, vflipped); | |
| 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]; | |
| } | |
| do_vflip(avctx, pic, vflipped); | |
| return 0; | |
| } | |
| static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF }; | |
| static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F }; | |
| static 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 int check_slice_size(AVCodecContext *avctx, | |
| const uint8_t *src, int src_size, | |
| int slice_size, int off) | |
| { | |
| int cur_slice_size; | |
| 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; | |
| } | |
| cur_slice_size = AV_RL32(src + off); | |
| if (cur_slice_size != slice_size - 16) { | |
| av_log(avctx, AV_LOG_ERROR, | |
| "Slice sizes mismatch: got %d instead of %d\n", | |
| cur_slice_size, slice_size - 16); | |
| } | |
| return 0; | |
| } | |
| static int load_buffer(AVCodecContext *avctx, | |
| const uint8_t *src, int src_size, | |
| GetByteContext *gb, | |
| int *nslices, int *off) | |
| { | |
| 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) { | |
| avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices, | |
| avctx->width, avctx->height); | |
| return AVERROR_PATCHWELCOME; | |
| } | |
| return 0; | |
| } | |
| 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; | |
| } | |
| typedef int (*decode_slice_func)(GetBitContext *gb, AVFrame *frame, | |
| int line, int height, uint8_t lru[3][8]); | |
| typedef void (*setup_lru_func)(uint8_t lru[3][8]); | |
| static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| decode_slice_func decode_slice, | |
| setup_lru_func setup_lru, | |
| enum AVPixelFormat fmt, | |
| uint32_t vflipped) | |
| { | |
| GetByteContext gb, gb_check; | |
| GetBitContext gb2; | |
| int nslices, slice, line = 0; | |
| uint32_t off, slice_size; | |
| uint64_t off_check; | |
| uint8_t lru[3][8]; | |
| int ret; | |
| ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off); | |
| if (ret < 0) | |
| return ret; | |
| off_check = off; | |
| gb_check = gb; | |
| for (slice = 0; slice < nslices; slice++) { | |
| slice_size = bytestream2_get_le32(&gb_check); | |
| if (slice_size <= 16 + (avctx->height * avctx->width / (8 * nslices))) | |
| return AVERROR_INVALIDDATA; | |
| off_check += slice_size; | |
| } | |
| if (off_check - avctx->discard_damaged_percentage*off_check/100 > src_size) | |
| return AVERROR_INVALIDDATA; | |
| avctx->pix_fmt = fmt; | |
| if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) | |
| return ret; | |
| do_vflip(avctx, pic, vflipped); | |
| for (slice = 0; slice < nslices; slice++) { | |
| slice_size = bytestream2_get_le32(&gb); | |
| setup_lru(lru); | |
| ret = check_slice_size(avctx, src, src_size, slice_size, off); | |
| if (ret < 0) | |
| return ret; | |
| if ((ret = init_get_bits8(&gb2, src + off + 16, slice_size - 16)) < 0) | |
| return ret; | |
| line += decode_slice(&gb2, pic, line, avctx->height - line, lru); | |
| off += slice_size; | |
| } | |
| if (avctx->height - line) { | |
| avpriv_request_sample(avctx, "Not enough slice data available"); | |
| } | |
| do_vflip(avctx, pic, vflipped); | |
| return 0; | |
| } | |
| av_always_inline | |
| static int dx2_decode_slice_5x5(GetBitContext *gb, AVFrame *frame, | |
| int line, int left, uint8_t lru[3][8], | |
| int is_565) | |
| { | |
| int x, y; | |
| int r, g, b; | |
| int width = frame->width; | |
| int stride = frame->linesize[0]; | |
| uint8_t *dst = frame->data[0] + stride * line; | |
| for (y = 0; y < left && get_bits_left(gb) >= 3 * width; 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 y; | |
| } | |
| static void setup_lru_555(uint8_t lru[3][8]) | |
| { | |
| memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru)); | |
| memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru)); | |
| memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru)); | |
| } | |
| static void setup_lru_565(uint8_t lru[3][8]) | |
| { | |
| memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru)); | |
| memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru)); | |
| memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru)); | |
| } | |
| static int dx2_decode_slice_555(GetBitContext *gb, AVFrame *frame, | |
| int line, int left, uint8_t lru[3][8]) | |
| { | |
| return dx2_decode_slice_5x5(gb, frame, line, left, lru, 0); | |
| } | |
| static int dx2_decode_slice_565(GetBitContext *gb, AVFrame *frame, | |
| int line, int left, uint8_t lru[3][8]) | |
| { | |
| return dx2_decode_slice_5x5(gb, frame, line, left, lru, 1); | |
| } | |
| static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, int is_565, | |
| uint32_t vflipped) | |
| { | |
| enum AVPixelFormat fmt = AV_PIX_FMT_RGB24; | |
| if (is_565) | |
| return dxtory_decode_v2(avctx, pic, src, src_size, | |
| dx2_decode_slice_565, | |
| setup_lru_565, | |
| fmt, vflipped); | |
| else | |
| return dxtory_decode_v2(avctx, pic, src, src_size, | |
| dx2_decode_slice_555, | |
| setup_lru_555, | |
| fmt, vflipped); | |
| } | |
| static int dx2_decode_slice_rgb(GetBitContext *gb, AVFrame *frame, | |
| int line, int left, uint8_t lru[3][8]) | |
| { | |
| int x, y; | |
| int width = frame->width; | |
| int stride = frame->linesize[0]; | |
| uint8_t *dst = frame->data[0] + stride * line; | |
| for (y = 0; y < left && get_bits_left(gb) >= 3 * width; 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 y; | |
| } | |
| static void default_setup_lru(uint8_t lru[3][8]) | |
| { | |
| int i; | |
| for (i = 0; i < 3; i++) | |
| memcpy(lru[i], def_lru, 8 * sizeof(*def_lru)); | |
| } | |
| static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| uint32_t vflipped) | |
| { | |
| return dxtory_decode_v2(avctx, pic, src, src_size, | |
| dx2_decode_slice_rgb, | |
| default_setup_lru, | |
| AV_PIX_FMT_BGR24, vflipped); | |
| } | |
| static int dx2_decode_slice_410(GetBitContext *gb, AVFrame *frame, | |
| int line, int left, | |
| uint8_t lru[3][8]) | |
| { | |
| int x, y, i, j; | |
| int width = frame->width; | |
| int ystride = frame->linesize[0]; | |
| int ustride = frame->linesize[1]; | |
| int vstride = frame->linesize[2]; | |
| uint8_t *Y = frame->data[0] + ystride * line; | |
| uint8_t *U = frame->data[1] + (ustride >> 2) * line; | |
| uint8_t *V = frame->data[2] + (vstride >> 2) * line; | |
| int h, w, hmargin, vmargin; | |
| int huvborder; | |
| h = frame->height & ~3; | |
| w = frame->width & ~3; | |
| hmargin = frame->width - w; | |
| vmargin = frame->height - h; | |
| huvborder = AV_CEIL_RSHIFT(frame->width, 2) - 1; | |
| for (y = 0; y < left - 3 && get_bits_left(gb) >= 18 * w / 4 + hmargin * 4 + (!!hmargin * 2); y += 4) { | |
| for (x = 0; x < w; 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; | |
| } | |
| if (hmargin) { | |
| for (j = 0; j < 4; j++) | |
| for (i = 0; i < hmargin; i++) | |
| Y[x + i + j * ystride] = decode_sym(gb, lru[0]); | |
| U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80; | |
| V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80; | |
| } | |
| Y += ystride * 4; | |
| U += ustride; | |
| V += vstride; | |
| } | |
| if (vmargin && y + vmargin == left) { | |
| for (x = 0; x < width; x += 4) { | |
| for (j = 0; j < vmargin; 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; | |
| } | |
| if (hmargin) { | |
| for (j = 0; j < vmargin; j++) { | |
| for (i = 0; i < hmargin; i++) | |
| Y[x + i + j * ystride] = decode_sym(gb, lru[0]); | |
| } | |
| U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80; | |
| V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80; | |
| } | |
| y += vmargin; | |
| } | |
| return y; | |
| } | |
| static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| uint32_t vflipped) | |
| { | |
| return dxtory_decode_v2(avctx, pic, src, src_size, | |
| dx2_decode_slice_410, | |
| default_setup_lru, | |
| AV_PIX_FMT_YUV410P, vflipped); | |
| } | |
| static int dx2_decode_slice_420(GetBitContext *gb, AVFrame *frame, | |
| int line, int left, | |
| uint8_t lru[3][8]) | |
| { | |
| int x, y; | |
| int width = frame->width; | |
| int ystride = frame->linesize[0]; | |
| int ustride = frame->linesize[1]; | |
| int vstride = frame->linesize[2]; | |
| uint8_t *Y = frame->data[0] + ystride * line; | |
| uint8_t *U = frame->data[1] + (ustride >> 1) * line; | |
| uint8_t *V = frame->data[2] + (vstride >> 1) * line; | |
| int h, w, hmargin, vmargin; | |
| int huvborder; | |
| h = frame->height & ~1; | |
| w = frame->width & ~1; | |
| hmargin = frame->width - w; | |
| vmargin = frame->height - h; | |
| huvborder = AV_CEIL_RSHIFT(frame->width, 1) - 1; | |
| for (y = 0; y < left - 1 && get_bits_left(gb) >= 3 * w + hmargin * 4; y += 2) { | |
| for (x = 0; x < w; 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; | |
| } | |
| if (hmargin) { | |
| Y[x + 0 * ystride] = decode_sym(gb, lru[0]); | |
| Y[x + 1 * ystride] = decode_sym(gb, lru[0]); | |
| U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80; | |
| V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80; | |
| } | |
| Y += ystride * 2; | |
| U += ustride; | |
| V += vstride; | |
| } | |
| if (vmargin) { | |
| for (x = 0; x < width; x += 2) { | |
| Y[x + 0] = decode_sym(gb, lru[0]); | |
| U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80; | |
| V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80; | |
| } | |
| if (hmargin) { | |
| Y[x] = decode_sym(gb, lru[0]); | |
| U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80; | |
| V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80; | |
| } | |
| } | |
| return y; | |
| } | |
| static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| uint32_t vflipped) | |
| { | |
| return dxtory_decode_v2(avctx, pic, src, src_size, | |
| dx2_decode_slice_420, | |
| default_setup_lru, | |
| AV_PIX_FMT_YUV420P, vflipped); | |
| } | |
| static int dx2_decode_slice_444(GetBitContext *gb, AVFrame *frame, | |
| int line, int left, | |
| uint8_t lru[3][8]) | |
| { | |
| int x, y; | |
| int width = frame->width; | |
| int ystride = frame->linesize[0]; | |
| int ustride = frame->linesize[1]; | |
| int vstride = frame->linesize[2]; | |
| uint8_t *Y = frame->data[0] + ystride * line; | |
| uint8_t *U = frame->data[1] + ustride * line; | |
| uint8_t *V = frame->data[2] + vstride * line; | |
| for (y = 0; y < left && get_bits_left(gb) >= 3 * width; 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 y; | |
| } | |
| static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic, | |
| const uint8_t *src, int src_size, | |
| uint32_t vflipped) | |
| { | |
| return dxtory_decode_v2(avctx, pic, src, src_size, | |
| dx2_decode_slice_444, | |
| default_setup_lru, | |
| AV_PIX_FMT_YUV444P, vflipped); | |
| } | |
| static int decode_frame(AVCodecContext *avctx, AVFrame *pic, | |
| int *got_frame, AVPacket *avpkt) | |
| { | |
| const uint8_t *src = avpkt->data; | |
| uint32_t type; | |
| int vflipped, ret; | |
| if (avpkt->size < 16) { | |
| av_log(avctx, AV_LOG_ERROR, "packet too small\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| type = AV_RB32(src); | |
| vflipped = !!(type & 0x20); | |
| switch (type) { | |
| case 0x01000021: | |
| case 0x01000001: | |
| ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16, | |
| AV_PIX_FMT_BGR24, 3, vflipped); | |
| break; | |
| case 0x01000029: | |
| case 0x01000009: | |
| ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16, vflipped); | |
| break; | |
| case 0x02000021: | |
| case 0x02000001: | |
| ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16, vflipped); | |
| break; | |
| case 0x02000029: | |
| case 0x02000009: | |
| ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16, vflipped); | |
| break; | |
| case 0x03000021: | |
| case 0x03000001: | |
| ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16, vflipped); | |
| break; | |
| case 0x03000029: | |
| case 0x03000009: | |
| ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16, vflipped); | |
| break; | |
| case 0x04000021: | |
| case 0x04000001: | |
| ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16, vflipped); | |
| break; | |
| case 0x04000029: | |
| case 0x04000009: | |
| ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16, vflipped); | |
| break; | |
| case 0x17000021: | |
| case 0x17000001: | |
| ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16, | |
| AV_PIX_FMT_RGB565LE, 2, vflipped); | |
| break; | |
| case 0x17000029: | |
| case 0x17000009: | |
| ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1, vflipped); | |
| break; | |
| case 0x18000021: | |
| case 0x19000021: | |
| case 0x18000001: | |
| case 0x19000001: | |
| ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16, | |
| AV_PIX_FMT_RGB555LE, 2, vflipped); | |
| break; | |
| case 0x18000029: | |
| case 0x19000029: | |
| case 0x18000009: | |
| case 0x19000009: | |
| ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0, vflipped); | |
| break; | |
| default: | |
| avpriv_request_sample(avctx, "Frame header %"PRIX32, type); | |
| return AVERROR_PATCHWELCOME; | |
| } | |
| if (ret) | |
| return ret; | |
| pic->pict_type = AV_PICTURE_TYPE_I; | |
| pic->flags |= AV_FRAME_FLAG_KEY; | |
| *got_frame = 1; | |
| return avpkt->size; | |
| } | |
| const FFCodec ff_dxtory_decoder = { | |
| .p.name = "dxtory", | |
| CODEC_LONG_NAME("Dxtory"), | |
| .p.type = AVMEDIA_TYPE_VIDEO, | |
| .p.id = AV_CODEC_ID_DXTORY, | |
| FF_CODEC_DECODE_CB(decode_frame), | |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, | |
| }; |