avcodec/dca: add new decoder based on libdcadec

1 files changed, 92 insertions, 0 deletions

diff --git a/libavcodec/dca_exss.h b/libavcodec/dca_exss.h
new file mode 100644
index 0000000000..323063aafb
--- /dev/null
+++ b/libavcodec/dca_exss.h
@@ -0,0 +1,92 @@
+/*
+ * 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_DCA_EXSS_H
+#define AVCODEC_DCA_EXSS_H
+
+#include "libavutil/common.h"
+
+#include "avcodec.h"
+#include "get_bits.h"
+
+typedef struct DCAExssAsset {
+    int     asset_offset;   ///< Offset to asset data from start of substream
+    int     asset_size;     ///< Size of encoded asset data
+    int     asset_index;    ///< Audio asset identifier
+
+    int     pcm_bit_res;                ///< PCM bit resolution
+    int     max_sample_rate;            ///< Maximum sample rate
+    int     nchannels_total;            ///< Total number of channels
+    int     one_to_one_map_ch_to_spkr;  ///< One to one channel to speaker mapping flag
+    int     embedded_stereo;            ///< Embedded stereo flag
+    int     embedded_6ch;               ///< Embedded 6 channels flag
+    int     spkr_mask_enabled;          ///< Speaker mask enabled flag
+    int     spkr_mask;                  ///< Loudspeaker activity mask
+    int     representation_type;        ///< Representation type
+
+    int     coding_mode;        ///< Coding mode for the asset
+    int     extension_mask;     ///< Coding components used in asset
+
+    int     core_offset;    ///< Offset to core component from start of substream
+    int     core_size;      ///< Size of core component in extension substream
+
+    int     xbr_offset;     ///< Offset to XBR extension from start of substream
+    int     xbr_size;       ///< Size of XBR extension in extension substream
+
+    int     xxch_offset;    ///< Offset to XXCH extension from start of substream
+    int     xxch_size;      ///< Size of XXCH extension in extension substream
+
+    int     x96_offset;     ///< Offset to X96 extension from start of substream
+    int     x96_size;       ///< Size of X96 extension in extension substream
+
+    int     lbr_offset;     ///< Offset to LBR component from start of substream
+    int     lbr_size;       ///< Size of LBR component in extension substream
+
+    int     xll_offset;         ///< Offset to XLL data from start of substream
+    int     xll_size;           ///< Size of XLL data in extension substream
+    int     xll_sync_present;   ///< XLL sync word present flag
+    int     xll_delay_nframes;  ///< Initial XLL decoding delay in frames
+    int     xll_sync_offset;    ///< Number of bytes offset to XLL sync
+
+    int     hd_stream_id;   ///< DTS-HD stream ID
+} DCAExssAsset;
+
+typedef struct DCAExssParser {
+    AVCodecContext  *avctx;
+    GetBitContext   gb;
+
+    int     exss_index;         ///< Extension substream index
+    int     exss_size_nbits;    ///< Number of bits for extension substream size
+    int     exss_size;          ///< Number of bytes of extension substream
+
+    int     static_fields_present;  ///< Per stream static fields presence flag
+    int     npresents;  ///< Number of defined audio presentations
+    int     nassets;    ///< Number of audio assets in extension substream
+
+    int     mix_metadata_enabled;   ///< Mixing metadata enable flag
+    int     nmixoutconfigs;         ///< Number of mixing configurations
+    int     nmixoutchs[4];          ///< Speaker layout mask for mixer output channels
+
+    DCAExssAsset   assets[1];    ///< Audio asset descriptors
+} DCAExssParser;
+
+int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size);
+
+#endif