dca: Move syncword definitions to a separate header

libavcodec/dca.c

@@ -24,6 +24,7 @@
 #include "libavutil/error.h"
 
 #include "dca.h"
+#include "dca_syncwords.h"
 #include "put_bits.h"
 
 const uint32_t avpriv_dca_sample_rates[16] = {
@@ -45,18 +46,18 @@ int ff_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
 
     mrk = AV_RB32(src);
     switch (mrk) {
-    case DCA_MARKER_RAW_BE:
+    case DCA_SYNCWORD_CORE_BE:
         memcpy(dst, src, src_size);
         return src_size;
-    case DCA_MARKER_RAW_LE:
+    case DCA_SYNCWORD_CORE_LE:
         for (i = 0; i < (src_size + 1) >> 1; i++)
             *sdst++ = av_bswap16(*ssrc++);
         return src_size;
-    case DCA_MARKER_14B_BE:
-    case DCA_MARKER_14B_LE:
+    case DCA_SYNCWORD_CORE_14B_BE:
+    case DCA_SYNCWORD_CORE_14B_LE:
         init_put_bits(&pb, dst, max_size);
         for (i = 0; i < (src_size + 1) >> 1; i++, src += 2) {
-            tmp = ((mrk == DCA_MARKER_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF;
+            tmp = ((mrk == DCA_SYNCWORD_CORE_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF;
             put_bits(&pb, 14, tmp);
         }
         flush_put_bits(&pb);

libavcodec/dca.h

@@ -35,15 +35,6 @@
 #include "fmtconvert.h"
 #include "get_bits.h"
 
-/** DCA syncwords, also used for bitstream type detection */
-#define DCA_MARKER_RAW_BE 0x7FFE8001
-#define DCA_MARKER_RAW_LE 0xFE7F0180
-#define DCA_MARKER_14B_BE 0x1FFFE800
-#define DCA_MARKER_14B_LE 0xFF1F00E8
-
-/** DCA-HD specific block starts with this marker. */
-#define DCA_HD_MARKER     0x64582025
-
 #define DCA_PRIM_CHANNELS_MAX  (7)
 #define DCA_ABITS_MAX         (32)      /* Should be 28 */
 #define DCA_SUBSUBFRAMES_MAX   (4)

libavcodec/dca_parser.c

@@ -23,6 +23,7 @@
  */
 
 #include "dca.h"
+#include "dca_syncwords.h"
 #include "get_bits.h"
 #include "parser.h"
 
@@ -35,9 +36,9 @@ typedef struct DCAParseContext {
 } DCAParseContext;
 
 #define IS_MARKER(state, i, buf, buf_size) \
-    ((state == DCA_MARKER_14B_LE && (i < buf_size - 2) && (buf[i + 1] & 0xF0) == 0xF0 &&  buf[i + 2]         == 0x07) || \
-     (state == DCA_MARKER_14B_BE && (i < buf_size - 2) &&  buf[i + 1]         == 0x07 && (buf[i + 2] & 0xF0) == 0xF0) || \
-      state == DCA_MARKER_RAW_LE || state == DCA_MARKER_RAW_BE)
+    ((state == DCA_SYNCWORD_CORE_14B_LE && (i < buf_size - 2) && (buf[i + 1] & 0xF0) == 0xF0 &&  buf[i + 2]         == 0x07) || \
+     (state == DCA_SYNCWORD_CORE_14B_BE && (i < buf_size - 2) &&  buf[i + 1]         == 0x07 && (buf[i + 2] & 0xF0) == 0xF0) || \
+      state == DCA_SYNCWORD_CORE_LE || state == DCA_SYNCWORD_CORE_BE)
 
 /**
  * Find the end of the current frame in the bitstream.
@@ -75,7 +76,7 @@ static int dca_find_frame_end(DCAParseContext *pc1, const uint8_t *buf,
         for (; i < buf_size; i++) {
             pc1->size++;
             state = (state << 8) | buf[i];
-            if (state == DCA_HD_MARKER && !pc1->hd_pos)
+            if (state == DCA_SYNCWORD_SUBSTREAM && !pc1->hd_pos)
                 pc1->hd_pos = pc1->size;
             if (state == pc1->lastmarker && IS_MARKER(state, i, buf, buf_size)) {
                 if (pc1->framesize > pc1->size)

libavcodec/dca_syncwords.h

@@ -0,0 +1,37 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_DCA_SYNCWORDS_H
+#define AVCODEC_DCA_SYNCWORDS_H
+
+enum DCASyncwords {
+    DCA_SYNCWORD_CORE_BE        = 0x7FFE8001,
+    DCA_SYNCWORD_CORE_LE        = 0xFE7F0180,
+    DCA_SYNCWORD_CORE_14B_BE    = 0x1FFFE800,
+    DCA_SYNCWORD_CORE_14B_LE    = 0xFF1F00E8,
+    DCA_SYNCWORD_XCH            = 0x5A5A5A5A,
+    DCA_SYNCWORD_XXCH           = 0x47004A03,
+    DCA_SYNCWORD_X96            = 0x1D95F262,
+    DCA_SYNCWORD_XBR            = 0x655E315E,
+    DCA_SYNCWORD_LBR            = 0x0A801921,
+    DCA_SYNCWORD_XLL            = 0x41A29547,
+    DCA_SYNCWORD_SUBSTREAM      = 0x64582025,
+    DCA_SYNCWORD_SUBSTREAM_CORE = 0x02B09261,
+};
+
+#endif /* AVCODEC_DCA_SYNCWORDS_H */

libavcodec/dcadec.c

@@ -37,6 +37,7 @@
 
 #include "avcodec.h"
 #include "dca.h"
+#include "dca_syncwords.h"
 #include "dcadata.h"
 #include "dcadsp.h"
 #include "dcahuff.h"
@@ -1100,7 +1101,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
             uint32_t bits = get_bits_long(&s->gb, 32);
 
             switch (bits) {
-            case 0x5a5a5a5a: {
+            case DCA_SYNCWORD_XCH: {
                 int ext_amode, xch_fsize;
 
                 s->xch_base_channel = s->prim_channels;
@@ -1137,7 +1138,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
                 s->xch_present = 1;
                 break;
             }
-            case 0x47004a03:
+            case DCA_SYNCWORD_XXCH:
                 /* XXCh: extended channels */
                 /* usually found either in core or HD part in DTS-HD HRA streams,
                  * but not in DTS-ES which contains XCh extensions instead */
@@ -1174,7 +1175,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
 
     /* check for ExSS (HD part) */
     if (s->dca_buffer_size - s->frame_size > 32 &&
-        get_bits_long(&s->gb, 32) == DCA_HD_MARKER)
+        get_bits_long(&s->gb, 32) == DCA_SYNCWORD_SUBSTREAM)
         ff_dca_exss_parse_header(s);
 
     avctx->profile = s->profile;

libavformat/dtsdec.c

@@ -20,14 +20,11 @@
  */
 
 #include "libavcodec/bytestream.h"
+#include "libavcodec/dca_syncwords.h"
+
 #include "avformat.h"
 #include "rawdec.h"
 
-#define DCA_MARKER_14B_BE 0x1FFFE800
-#define DCA_MARKER_14B_LE 0xFF1F00E8
-#define DCA_MARKER_RAW_BE 0x7FFE8001
-#define DCA_MARKER_RAW_LE 0xFE7F0180
-
 static int dts_probe(AVProbeData *p)
 {
     const uint8_t *buf, *bufp;
@@ -42,16 +39,16 @@ static int dts_probe(AVProbeData *p)
         state = (state << 16) | bytestream_get_be16(&bufp);
 
         /* regular bitstream */
-        if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
+        if (state == DCA_SYNCWORD_CORE_BE || state == DCA_SYNCWORD_CORE_LE)
             markers[0]++;
 
         /* 14 bits big-endian bitstream */
-        if (state == DCA_MARKER_14B_BE)
+        if (state == DCA_SYNCWORD_CORE_14B_BE)
             if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
                 markers[1]++;
 
         /* 14 bits little-endian bitstream */
-        if (state == DCA_MARKER_14B_LE)
+        if (state == DCA_SYNCWORD_CORE_14B_LE)
             if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
                 markers[2]++;
     }

libavformat/spdifenc.c

@@ -51,6 +51,7 @@
 #include "spdif.h"
 #include "libavcodec/ac3.h"
 #include "libavcodec/dca.h"
+#include "libavcodec/dca_syncwords.h"
 #include "libavcodec/aacadtsdec.h"
 #include "libavutil/opt.h"
 
@@ -251,25 +252,25 @@ static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
         return AVERROR_INVALIDDATA;
 
     switch (syncword_dts) {
-    case DCA_MARKER_RAW_BE:
+    case DCA_SYNCWORD_CORE_BE:
         blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
         core_size = ((AV_RB24(pkt->data + 5) >> 4) & 0x3fff) + 1;
         sample_rate = avpriv_dca_sample_rates[(pkt->data[8] >> 2) & 0x0f];
         break;
-    case DCA_MARKER_RAW_LE:
+    case DCA_SYNCWORD_CORE_LE:
         blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
         ctx->extra_bswap = 1;
         break;
-    case DCA_MARKER_14B_BE:
+    case DCA_SYNCWORD_CORE_14B_BE:
         blocks =
             (((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
         break;
-    case DCA_MARKER_14B_LE:
+    case DCA_SYNCWORD_CORE_14B_LE:
         blocks =
             (((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
         ctx->extra_bswap = 1;
         break;
-    case DCA_HD_MARKER:
+    case DCA_SYNCWORD_SUBSTREAM:
         /* We only handle HD frames that are paired with core. However,
            sometimes DTS-HD streams with core have a stray HD frame without
            core in the beginning of the stream. */