intrax8 decoder patch by "someone"

Originally committed as revision 10971 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 51 insertions, 0 deletions

diff --git a/libavcodec/intrax8.h b/libavcodec/intrax8.h
new file mode 100644
index 0000000000..0bbe72ded2
--- /dev/null
+++ b/libavcodec/intrax8.h
@@ -0,0 +1,51 @@
+/*
+ * 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
+ */
+
+typedef struct{
+    VLC * j_ac_vlc[4];//they point to the static j_mb_vlc
+    VLC * j_orient_vlc;
+    VLC * j_dc_vlc[3];
+
+    int use_quant_matrix;
+//set by ff_intrax8_common_init
+    uint8_t * prediction_table;//2*(mb_w*2)
+    ScanTable scantable[3];
+//set by the caller codec
+    MpegEncContext * s;
+    int quant;
+    int dquant;
+    int qsum;
+//calculated per frame
+    int quant_dc_chroma;
+    int divide_quant_dc_luma;
+    int divide_quant_dc_chroma;
+//changed per block
+    int edges;
+    int flat_dc;
+    int predicted_dc;
+    int raw_orient;
+    int chroma_orient;
+    int orient;
+    int est_run;
+//#ifdef DEBUG
+    int mode_index[10];//debug only
+//#endif
+} IntraX8Context;
+
+void ff_intrax8_common_init(IntraX8Context * w, MpegEncContext * const s);
+int  ff_intrax8_decode_picture(IntraX8Context * w, int quant, int halfpq);