tta: move code that will be shared with encoder to separate file

Signed-off-by: Paul B Mahol <onemda@gmail.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/libavcodec/ttadata.h b/libavcodec/ttadata.h
new file mode 100644
index 0000000000..48c4cd0354
--- /dev/null
+++ b/libavcodec/ttadata.h
@@ -0,0 +1,50 @@
+/*
+ * TTA (The Lossless True Audio) data
+ *
+ * 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_TTADATA_H
+#define AVCODEC_TTADATA_H
+
+#include "internal.h"
+
+#define MAX_ORDER 16
+typedef struct TTAFilter {
+    int32_t shift, round, error;
+    int32_t qm[MAX_ORDER];
+    int32_t dx[MAX_ORDER];
+    int32_t dl[MAX_ORDER];
+} TTAFilter;
+
+typedef struct TTARice {
+    uint32_t k0, k1, sum0, sum1;
+} TTARice;
+
+typedef struct TTAChannel {
+    int32_t predictor;
+    TTAFilter filter;
+    TTARice rice;
+} TTAChannel;
+
+extern const uint32_t ff_tta_shift_1[];
+extern const uint32_t * const ff_tta_shift_16;
+extern const uint8_t ff_tta_filter_configs[];
+
+void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1);
+void ff_tta_filter_init(TTAFilter *c, int32_t shift);
+#endif /* AVCODEC_TTADATA_H */