1 files changed, 97 insertions, 0 deletions
diff --git a/libavcodec/dcadec.h b/libavcodec/dcadec.h
new file mode 100644
index 0000000000..456f3c433b
--- /dev/null
+++ b/libavcodec/dcadec.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2016 foo86
+ *
+ * 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_DCADEC_H
+#define AVCODEC_DCADEC_H
+
+#include "libavutil/common.h"
+#include "libavutil/crc.h"
+#include "libavutil/float_dsp.h"
+
+#include "avcodec.h"
+#include "get_bits.h"
+#include "dca.h"
+#include "dcadsp.h"
+#include "dca_core.h"
+#include "dca_exss.h"
+#include "dca_xll.h"
+#include "dca_lbr.h"
+
+#define DCA_PACKET_CORE         0x01
+#define DCA_PACKET_EXSS         0x02
+#define DCA_PACKET_XLL          0x04
+#define DCA_PACKET_LBR          0x08
+#define DCA_PACKET_MASK         0x0f
+
+#define DCA_PACKET_RECOVERY     0x10    ///< Sync error recovery flag
+#define DCA_PACKET_RESIDUAL     0x20    ///< Core valid for residual decoding
+
+typedef struct DCAContext {
+    const AVClass   *class;       ///< class for AVOptions
+    AVCodecContext  *avctx;
+
+    DCACoreDecoder core;  ///< Core decoder context
+    DCAExssParser  exss;  ///< EXSS parser context
+    DCAXllDecoder  xll;   ///< XLL decoder context
+    DCALbrDecoder  lbr;   ///< LBR decoder context
+
+    DCADSPContext   dcadsp;
+
+    const AVCRC     *crctab;
+
+    uint8_t         *buffer;    ///< Packet buffer
+    unsigned int    buffer_size;
+
+    int     packet; ///< Packet flags
+
+    int     request_channel_layout; ///< Converted from avctx.request_channel_layout
+    int     core_only;              ///< Core only decoding flag
+} DCAContext;
+
+int ff_dca_set_channel_layout(AVCodecContext *avctx, int *ch_remap, int dca_mask);
+
+void ff_dca_downmix_to_stereo_fixed(DCADSPContext *dcadsp, int32_t **samples,
+                                    int *coeff_l, int nsamples, int ch_mask);
+void ff_dca_downmix_to_stereo_float(AVFloatDSPContext *fdsp, float **samples,
+                                    int *coeff_l, int nsamples, int ch_mask);
+
+static inline int ff_dca_check_crc(AVCodecContext *avctx, GetBitContext *s,
+                                   int p1, int p2)
+{
+    DCAContext *dca = avctx->priv_data;
+
+    if (!(avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_CAREFUL)))
+        return 0;
+    if (((p1 | p2) & 7) || p1 < 0 || p2 > s->size_in_bits || p2 - p1 < 16)
+        return -1;
+    if (av_crc(dca->crctab, 0xffff, s->buffer + p1 / 8, (p2 - p1) / 8))
+        return -1;
+    return 0;
+}
+
+static inline int ff_dca_seek_bits(GetBitContext *s, int p)
+{
+    if (p < s->index || p > s->size_in_bits)
+        return -1;
+    s->index = p;
+    return 0;
+}
+
+#endif