ffmpeg-2.1.1: move directory

git-svn-id: svn://kolibrios.org@6148 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavcodec/txd.c

@@ -0,0 +1,142 @@
+/*
+ * Renderware TeXture Dictionary (.txd) image decoder
+ * Copyright (c) 2007 Ivo van Poorten
+ *
+ * See also: http://wiki.multimedia.cx/index.php?title=TXD
+ *
+ * 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 "libavutil/intreadwrite.h"
+#include "libavutil/imgutils.h"
+#include "bytestream.h"
+#include "avcodec.h"
+#include "internal.h"
+#include "s3tc.h"
+
+static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+                            AVPacket *avpkt) {
+    GetByteContext gb;
+    AVFrame * const p = data;
+    unsigned int version, w, h, d3d_format, depth, stride, flags;
+    unsigned int y, v;
+    uint8_t *ptr;
+    uint32_t *pal;
+    int ret;
+
+    bytestream2_init(&gb, avpkt->data, avpkt->size);
+    version         = bytestream2_get_le32(&gb);
+    bytestream2_skip(&gb, 72);
+    d3d_format      = bytestream2_get_le32(&gb);
+    w               = bytestream2_get_le16(&gb);
+    h               = bytestream2_get_le16(&gb);
+    depth           = bytestream2_get_byte(&gb);
+    bytestream2_skip(&gb, 2);
+    flags           = bytestream2_get_byte(&gb);
+
+    if (version < 8 || version > 9) {
+        av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
+                                                                    version);
+        return AVERROR_PATCHWELCOME;
+    }
+
+    if (depth == 8) {
+        avctx->pix_fmt = AV_PIX_FMT_PAL8;
+    } else if (depth == 16 || depth == 32) {
+        avctx->pix_fmt = AV_PIX_FMT_RGB32;
+    } else {
+        av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
+        return AVERROR_PATCHWELCOME;
+    }
+
+    if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
+        return ret;
+    if (w != avctx->width || h != avctx->height)
+        avcodec_set_dimensions(avctx, w, h);
+    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
+        return ret;
+
+    p->pict_type = AV_PICTURE_TYPE_I;
+
+    ptr    = p->data[0];
+    stride = p->linesize[0];
+
+    if (depth == 8) {
+        pal = (uint32_t *) p->data[1];
+        for (y = 0; y < 256; y++) {
+            v = bytestream2_get_be32(&gb);
+            pal[y] = (v >> 8) + (v << 24);
+        }
+        if (bytestream2_get_bytes_left(&gb) < w * h)
+            return AVERROR_INVALIDDATA;
+        bytestream2_skip(&gb, 4);
+        for (y=0; y<h; y++) {
+            bytestream2_get_buffer(&gb, ptr, w);
+            ptr += stride;
+        }
+    } else if (depth == 16) {
+        bytestream2_skip(&gb, 4);
+        switch (d3d_format) {
+        case 0:
+            if (!(flags & 1))
+                goto unsupported;
+        case FF_S3TC_DXT1:
+            if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 8)
+                return AVERROR_INVALIDDATA;
+            ff_decode_dxt1(&gb, ptr, w, h, stride);
+            break;
+        case FF_S3TC_DXT3:
+            if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 16)
+                return AVERROR_INVALIDDATA;
+            ff_decode_dxt3(&gb, ptr, w, h, stride);
+            break;
+        default:
+            goto unsupported;
+        }
+    } else if (depth == 32) {
+        switch (d3d_format) {
+        case 0x15:
+        case 0x16:
+            if (bytestream2_get_bytes_left(&gb) < h * w * 4)
+                return AVERROR_INVALIDDATA;
+            for (y=0; y<h; y++) {
+                bytestream2_get_buffer(&gb, ptr, w * 4);
+                ptr += stride;
+            }
+            break;
+        default:
+            goto unsupported;
+        }
+    }
+
+    *got_frame = 1;
+
+    return avpkt->size;
+
+unsupported:
+    av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
+    return AVERROR_PATCHWELCOME;
+}
+
+AVCodec ff_txd_decoder = {
+    .name           = "txd",
+    .long_name      = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_TXD,
+    .decode         = txd_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+};