support for Sierra Online audio files and Apple QuickDraw codec,

courtesy of Konstantin Shishkov

Originally committed as revision 3529 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 153 insertions, 0 deletions

diff --git a/libavcodec/qdrw.c b/libavcodec/qdrw.c
new file mode 100644
index 0000000000..0adb5f49a1
--- /dev/null
+++ b/libavcodec/qdrw.c
@@ -0,0 +1,153 @@
+/*
+ * QuickDraw (qdrw) codec
+ * Copyright (c) 2004 Konstantin Shishkov
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+ 
+/**
+ * @file qdrw.c
+ * Apple QuickDraw codec.
+ */
+ 
+#include "avcodec.h"
+#include "mpegvideo.h"
+
+typedef struct QdrawContext{
+    AVCodecContext *avctx;
+    AVFrame pic;
+    uint8_t palette[256*3];
+} QdrawContext;
+
+static int decode_frame(AVCodecContext *avctx, 
+                        void *data, int *data_size,
+                        uint8_t *buf, int buf_size)
+{
+    QdrawContext * const a = avctx->priv_data;
+    AVFrame * const p= (AVFrame*)&a->pic;
+    uint8_t* outdata;
+    int colors;
+    int i;
+    
+    /* special case for last picture */
+    if (buf_size == 0) {
+        return 0;
+    }
+
+    if(p->data[0])
+        avctx->release_buffer(avctx, p);
+
+    p->reference= 0;
+    if(avctx->get_buffer(avctx, p) < 0){
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return -1;
+    }
+    p->pict_type= I_TYPE;
+    p->key_frame= 1;
+
+    outdata = a->pic.data[0];
+    
+    buf += 0x68; /* jump to palette */
+    colors = BE_32(buf);
+    buf += 4;
+    
+    if(colors < 0 || colors > 256) {
+        av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors);
+        return -1;
+    }
+    
+    for (i = 0; i <= colors; i++) {
+        int idx;
+        idx = BE_16(buf); /* color index */
+        buf += 2;
+        
+        a->palette[idx * 3 + 0] = *buf++;
+        buf++;
+        a->palette[idx * 3 + 1] = *buf++;
+        buf++;
+        a->palette[idx * 3 + 2] = *buf++;
+        buf++;
+    }
+
+    if (colors)
+        a->pic.palette_has_changed = 1;
+
+    buf += 18; /* skip unneeded data */
+    for (i = 0; i < avctx->height; i++) {
+        int size, left, code, pix;
+        uint8_t *next;
+        uint8_t *out;
+        int tsize = 0;
+        
+        /* decode line */
+        out = outdata;
+        size = BE_16(buf); /* size of packed line */
+        buf += 2;
+        left = size;
+        next = buf + size;
+        while (left > 0) {
+            code = *buf++;
+            if (code & 0x80 ) { /* run */
+                int i;
+                pix = *buf++;
+                for (i = 0; i < 257 - code; i++) {
+                    *out++ = a->palette[pix * 3 + 0];
+                    *out++ = a->palette[pix * 3 + 1];
+                    *out++ = a->palette[pix * 3 + 2];
+                }
+                tsize += 257 - code;
+                left -= 2;
+            } else { /* copy */
+                int i, pix;
+                for (i = 0; i <= code; i++) {
+                    pix = *buf++;
+                    *out++ = a->palette[pix * 3 + 0];
+                    *out++ = a->palette[pix * 3 + 1];
+                    *out++ = a->palette[pix * 3 + 2];
+                }
+                left -= 2 + code;
+                tsize += code + 1;
+            }
+        }
+        buf = next;
+        outdata += a->pic.linesize[0];
+    }
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame*)data = a->pic;
+    
+    return buf_size;
+}
+
+static int decode_init(AVCodecContext *avctx){
+//    QdrawContext * const a = avctx->priv_data;
+
+    avctx->pix_fmt= PIX_FMT_RGB24;
+
+    return 0;
+}
+
+AVCodec qdraw_decoder = {
+    "qdraw",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_QDRAW,
+    sizeof(QdrawContext),
+    decode_init,
+    NULL,
+    NULL,
+    decode_frame,
+    CODEC_CAP_DR1,
+};