1 files changed, 73 insertions, 0 deletions
diff --git a/libavformat/img2_alias_pix.c b/libavformat/img2_alias_pix.c
new file mode 100644
index 0000000..c2650ad
--- /dev/null
+++ b/libavformat/img2_alias_pix.c
@@ -0,0 +1,73 @@
+/*
+ * Alias PIX image demuxer
+ * Copyright (c) 2014 Michael Niedermayer
+ *
+ * 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 "img2.h"
+#include "libavcodec/bytestream.h"
+
+static int alias_pix_read_probe(AVProbeData *p)
+{
+    const uint8_t *b = p->buf;
+    const uint8_t *end = b + p->buf_size;
+    int width  = bytestream_get_be16(&b);
+    int height = bytestream_get_be16(&b);
+    av_unused int ox = bytestream_get_be16(&b);
+    av_unused int oy = bytestream_get_be16(&b);
+    int bpp    = bytestream_get_be16(&b);
+    int x, y;
+
+    if (!width || !height)
+        return 0;
+
+    if (bpp != 24 && bpp != 8)
+        return 0;
+
+    for (y=0; y<2 && y<height; y++) {
+        for (x=0; x<width; ) {
+            int count = *b++;
+            if (count == 0 || x + count > width)
+                return 0;
+            if (b > end)
+                return AVPROBE_SCORE_MAX / 8;
+            b += bpp / 8;
+            x += count;
+        }
+    }
+
+    return AVPROBE_SCORE_EXTENSION + 1;
+}
+
+static const AVClass image2_alias_pix_class = {
+    .class_name = "alias_pix demuxer",
+    .item_name  = av_default_item_name,
+    .option     = ff_img_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_image2_alias_pix_demuxer = {
+    .name           = "alias_pix",
+    .long_name      = NULL_IF_CONFIG_SMALL("Alias/Wavefront PIX image"),
+    .priv_data_size = sizeof(VideoDemuxData),
+    .read_probe     = alias_pix_read_probe,
+    .read_header    = ff_img_read_header,
+    .read_packet    = ff_img_read_packet,
+    .raw_codec_id   = AV_CODEC_ID_ALIAS_PIX,
+    .priv_class     = &image2_alias_pix_class,
+};