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/tmv.c

@@ -0,0 +1,97 @@
+/*
+ * 8088flex TMV video decoder
+ * Copyright (c) 2009 Daniel Verkamp <daniel at drv.nu>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * 8088flex TMV video decoder
+ * @author Daniel Verkamp
+ * @see http://www.oldskool.org/pc/8088_Corruption
+ */
+
+#include <string.h>
+
+#include "avcodec.h"
+#include "internal.h"
+#include "libavutil/internal.h"
+#include "libavutil/xga_font_data.h"
+
+#include "cga_data.h"
+
+static int tmv_decode_frame(AVCodecContext *avctx, void *data,
+                            int *got_frame, AVPacket *avpkt)
+{
+    AVFrame *frame     = data;
+    const uint8_t *src = avpkt->data;
+    uint8_t *dst;
+    unsigned char_cols = avctx->width >> 3;
+    unsigned char_rows = avctx->height >> 3;
+    unsigned x, y, fg, bg, c;
+    int ret;
+
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+        return ret;
+
+    if (avpkt->size < 2*char_rows*char_cols) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Input buffer too small, truncated sample?\n");
+        *got_frame = 0;
+        return AVERROR_INVALIDDATA;
+    }
+
+    frame->pict_type = AV_PICTURE_TYPE_I;
+    frame->key_frame = 1;
+    dst              = frame->data[0];
+
+    frame->palette_has_changed = 1;
+    memcpy(frame->data[1], ff_cga_palette, 16 * 4);
+    memset(frame->data[1] + 16 * 4, 0, AVPALETTE_SIZE - 16 * 4);
+
+    for (y = 0; y < char_rows; y++) {
+        for (x = 0; x < char_cols; x++) {
+            c  = *src++;
+            bg = *src  >> 4;
+            fg = *src++ & 0xF;
+            ff_draw_pc_font(dst + x * 8, frame->linesize[0],
+                            avpriv_cga_font, 8, c, fg, bg);
+        }
+        dst += frame->linesize[0] * 8;
+    }
+
+    *got_frame = 1;
+
+    return avpkt->size;
+}
+
+static av_cold int tmv_decode_init(AVCodecContext *avctx)
+{
+    avctx->pix_fmt = AV_PIX_FMT_PAL8;
+    return 0;
+}
+
+AVCodec ff_tmv_decoder = {
+    .name           = "tmv",
+    .long_name      = NULL_IF_CONFIG_SMALL("8088flex TMV"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_TMV,
+    .init           = tmv_decode_init,
+    .decode         = tmv_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+};