diff ffmpeg/libavcodec/mpeg12.h @ 10:6840f77b83aa

commit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavcodec/mpeg12.h	Sun Apr 21 10:55:35 2013 +0200
@@ -0,0 +1,74 @@
+/*
+ * MPEG1/2 common code
+ * Copyright (c) 2007 Aurelien Jacobs <[e-mail]>
+ *
+ * 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
+ */
+
+#ifndef AVCODEC_MPEG12_H
+#define AVCODEC_MPEG12_H
+
+#include "mpegvideo.h"
+
+#define DC_VLC_BITS 9
+#define MV_VLC_BITS 9
+#define TEX_VLC_BITS 9
+
+#define MBINCR_VLC_BITS 9
+#define MB_PAT_VLC_BITS 9
+#define MB_PTYPE_VLC_BITS 6
+#define MB_BTYPE_VLC_BITS 6
+
+extern VLC ff_dc_lum_vlc;
+extern VLC ff_dc_chroma_vlc;
+extern VLC ff_mbincr_vlc;
+extern VLC ff_mb_ptype_vlc;
+extern VLC ff_mb_btype_vlc;
+extern VLC ff_mb_pat_vlc;
+extern VLC ff_mv_vlc;
+
+extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
+
+void ff_mpeg12_common_init(MpegEncContext *s);
+void ff_mpeg12_init_vlcs(void);
+
+static inline int decode_dc(GetBitContext *gb, int component)
+{
+    int code, diff;
+
+    if (component == 0) {
+        code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2);
+    } else {
+        code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2);
+    }
+    if (code < 0){
+        av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
+        return 0xffff;
+    }
+    if (code == 0) {
+        diff = 0;
+    } else {
+        diff = get_xbits(gb, code);
+    }
+    return diff;
+}
+
+int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n);
+void ff_mpeg1_clean_buffers(MpegEncContext *s);
+int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
+
+#endif /* AVCODEC_MPEG12_H */