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Diffstat (limited to 'ffmpeg/libavcodec/dxtory.c')
-rw-r--r--ffmpeg/libavcodec/dxtory.c226
1 files changed, 0 insertions, 226 deletions
diff --git a/ffmpeg/libavcodec/dxtory.c b/ffmpeg/libavcodec/dxtory.c
deleted file mode 100644
index 21282b8..0000000
--- a/ffmpeg/libavcodec/dxtory.c
+++ /dev/null
@@ -1,226 +0,0 @@
-/*
- * 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
- */
-
-#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(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 const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
-
-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 dx2_decode_slice(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(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(ENOSYS);
- }
-
- slice_height = avctx->height / nslices;
- if ((avctx->width & 1) || (slice_height & 1)) {
- avpriv_request_sample(avctx, "slice dimensions %dx%d",
- avctx->width, slice_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];
-
- 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(&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;
- }
-
- 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 0x02000001:
- ret = dxtory_decode_v1(avctx, pic, src + 16, avpkt->size - 16);
- break;
- case 0x02000009:
- ret = dxtory_decode_v2(avctx, pic, src + 16, avpkt->size - 16);
- 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,
-};
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