1 files changed, 65 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/ac3.h b/contrib/ffmpeg/libavcodec/ac3.h
new file mode 100644
index 000000000..5daa9750f
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/ac3.h
@@ -0,0 +1,65 @@
+/*
+ * Common code between AC3 encoder and decoder
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
+ *
+ * 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
+ */
+
+/**
+ * @file ac3.h
+ * Common code between AC3 encoder and decoder.
+ */
+
+#define AC3_MAX_CODED_FRAME_SIZE 3840 /* in bytes */
+#define AC3_MAX_CHANNELS 6 /* including LFE channel */
+
+#define NB_BLOCKS 6 /* number of PCM blocks inside an AC3 frame */
+#define AC3_FRAME_SIZE (NB_BLOCKS * 256)
+
+/* exponent encoding strategy */
+#define EXP_REUSE 0
+#define EXP_NEW   1
+
+#define EXP_D15   1
+#define EXP_D25   2
+#define EXP_D45   3
+
+typedef struct AC3BitAllocParameters {
+    int fscod; /* frequency */
+    int halfratecod;
+    int sgain, sdecay, fdecay, dbknee, floor;
+    int cplfleak, cplsleak;
+} AC3BitAllocParameters;
+
+#if 0
+extern const uint16_t ac3_freqs[3];
+extern const uint16_t ac3_bitratetab[19];
+extern const int16_t ac3_window[256];
+extern const uint8_t sdecaytab[4];
+extern const uint8_t fdecaytab[4];
+extern const uint16_t sgaintab[4];
+extern const uint16_t dbkneetab[4];
+extern const uint16_t floortab[8];
+extern const uint16_t fgaintab[8];
+#endif
+
+void ac3_common_init(void);
+void ac3_parametric_bit_allocation(AC3BitAllocParameters *s, uint8_t *bap,
+                                   int8_t *exp, int start, int end,
+                                   int snroffset, int fgain, int is_lfe,
+                                   int deltbae,int deltnseg,
+                                   uint8_t *deltoffst, uint8_t *deltlen, uint8_t *deltba);