avcodec/mpeg12.h: Move decoder-only stuff to a new header

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/libavcodec/mpeg12dec.h b/libavcodec/mpeg12dec.h
new file mode 100644
index 0000000000..b4e94a92ce
--- /dev/null
+++ b/libavcodec/mpeg12dec.h
@@ -0,0 +1,60 @@
+/*
+ * MPEG-1/2 decoder header
+ * Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * 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_MPEG12DEC_H
+#define AVCODEC_MPEG12DEC_H
+
+#include "get_bits.h"
+#include "mpeg12vlc.h"
+#include "rl.h"
+
+#define INIT_2D_VLC_RL(rl, static_size, flags)\
+{\
+    static RL_VLC_ELEM rl_vlc_table[static_size];\
+    rl.rl_vlc[0] = rl_vlc_table;\
+    ff_init_2d_vlc_rl(&rl, static_size, flags);\
+}
+
+void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags);
+
+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) {
+        diff = 0;
+    } else {
+        diff = get_xbits(gb, code);
+    }
+    return diff;
+}
+
+int ff_mpeg1_decode_block_intra(GetBitContext *gb,
+                                const uint16_t *quant_matrix,
+                                const uint8_t *scantable, int last_dc[3],
+                                int16_t *block, int index, int qscale);
+
+#endif /* AVCODEC_MPEG12DEC_H */