/* * 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 "get_bits.h" #include "internal.h" #include "unary.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 * (int64_t)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 < FFALIGN(avctx->width, 4) * FFALIGN(avctx->height, 4) * 9LL / 8) { 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_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; } 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 < FFALIGN(avctx->width, 2) * FFALIGN(avctx->height, 2) * 3LL / 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 * 3LL) { 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; } 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) { 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_get_buffer(avctx, pic, 0)) < 0) return ret; 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"); } 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) > 6 * 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) { 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); else return dxtory_decode_v2(avctx, pic, src, src_size, dx2_decode_slice_555, setup_lru_555, fmt); } 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) > 6 * 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) { return dxtory_decode_v2(avctx, pic, src, src_size, dx2_decode_slice_rgb, default_setup_lru, AV_PIX_FMT_BGR24); } 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; for (y = 0; y < left - 3 && get_bits_left(gb) > 9 * width; 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 y; } static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size) { return dxtory_decode_v2(avctx, pic, src, src_size, dx2_decode_slice_410, default_setup_lru, AV_PIX_FMT_YUV410P); } 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; for (y = 0; y < left - 1 && get_bits_left(gb) > 6 * width; 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 y; } static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size) { return dxtory_decode_v2(avctx, pic, src, src_size, dx2_decode_slice_420, default_setup_lru, AV_PIX_FMT_YUV420P); } 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) > 6 * 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) { return dxtory_decode_v2(avctx, pic, src, src_size, dx2_decode_slice_444, default_setup_lru, AV_PIX_FMT_YUV444P); } 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 %"PRIX32, 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 = AV_CODEC_CAP_DR1, };