avcodec/ac3: Move non-(de|en)coder-only parts out of ac3.h

Move AC3HeaderInfo into ac3_parser_internal.h and the rest
into a new header ac3defs.h.

This also breaks an include cycle of ac3.h and ac3tab.h
(the latter now only needs ac3defs.h).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

15 files changed, 156 insertions, 122 deletions

diff --git a/libavcodec/ac3.c b/libavcodec/ac3.c
index 01fb3b3d7a..60491d1a7a 100644
--- a/libavcodec/ac3.c
+++ b/libavcodec/ac3.c
@@ -28,6 +28,7 @@
 #include "libavutil/macros.h"
 
 #include "ac3.h"
+#include "ac3defs.h"
 
 /**
  * Starting frequency coefficient bin for each critical band.
diff --git a/libavcodec/ac3.h b/libavcodec/ac3.h
index 8e66d47629..29f9f9df8d 100644
--- a/libavcodec/ac3.h
+++ b/libavcodec/ac3.h
@@ -30,28 +30,8 @@
 #include <math.h>
 #include <stdint.h>
 
-#define EAC3_MAX_CHANNELS 16          /**< maximum number of channels in EAC3 */
-#define AC3_MAX_CHANNELS 7            /**< maximum number of channels, including coupling channel */
-#define CPL_CH 0                      /**< coupling channel index */
-
-#define AC3_MAX_COEFS   256
-#define AC3_BLOCK_SIZE  256
-#define AC3_MAX_BLOCKS    6
-#define AC3_FRAME_SIZE (AC3_MAX_BLOCKS * 256)
-#define AC3_WINDOW_SIZE (AC3_BLOCK_SIZE * 2)
-#define AC3_CRITICAL_BANDS 50
-#define AC3_MAX_CPL_BANDS  18
-
 #include "ac3tab.h"
 
-/* exponent encoding strategy */
-#define EXP_REUSE 0
-#define EXP_NEW   1
-
-#define EXP_D15   1
-#define EXP_D25   2
-#define EXP_D45   3
-
 #ifndef USE_FIXED
 #define USE_FIXED 0
 #endif
@@ -112,58 +92,6 @@ typedef float                   SHORTFLOAT;
 #define LEVEL_ZERO              0.0000000000000000
 #define LEVEL_ONE               1.0000000000000000
 
-/** Delta bit allocation strategy */
-typedef enum {
-    DBA_REUSE = 0,
-    DBA_NEW,
-    DBA_NONE,
-    DBA_RESERVED
-} AC3DeltaStrategy;
-
-/** Channel mode (audio coding mode) */
-typedef enum {
-    AC3_CHMODE_DUALMONO = 0,
-    AC3_CHMODE_MONO,
-    AC3_CHMODE_STEREO,
-    AC3_CHMODE_3F,
-    AC3_CHMODE_2F1R,
-    AC3_CHMODE_3F1R,
-    AC3_CHMODE_2F2R,
-    AC3_CHMODE_3F2R
-} AC3ChannelMode;
-
-/** Dolby Surround mode */
-typedef enum AC3DolbySurroundMode {
-    AC3_DSURMOD_NOTINDICATED = 0,
-    AC3_DSURMOD_OFF,
-    AC3_DSURMOD_ON,
-    AC3_DSURMOD_RESERVED
-} AC3DolbySurroundMode;
-
-/** Dolby Surround EX mode */
-typedef enum AC3DolbySurroundEXMode {
-    AC3_DSUREXMOD_NOTINDICATED = 0,
-    AC3_DSUREXMOD_OFF,
-    AC3_DSUREXMOD_ON,
-    AC3_DSUREXMOD_PLIIZ
-} AC3DolbySurroundEXMode;
-
-/** Dolby Headphone mode */
-typedef enum AC3DolbyHeadphoneMode {
-    AC3_DHEADPHONMOD_NOTINDICATED = 0,
-    AC3_DHEADPHONMOD_OFF,
-    AC3_DHEADPHONMOD_ON,
-    AC3_DHEADPHONMOD_RESERVED
-} AC3DolbyHeadphoneMode;
-
-/** Preferred Stereo Downmix mode */
-typedef enum AC3PreferredStereoDownmixMode {
-    AC3_DMIXMOD_NOTINDICATED = 0,
-    AC3_DMIXMOD_LTRT,
-    AC3_DMIXMOD_LORO,
-    AC3_DMIXMOD_DPLII // reserved value in A/52, but used by encoders to indicate DPL2
-} AC3PreferredStereoDownmixMode;
-
 typedef struct AC3BitAllocParameters {
     int sr_code;
     int sr_shift;
@@ -172,49 +100,6 @@ typedef struct AC3BitAllocParameters {
 } AC3BitAllocParameters;
 
 /**
- * @struct AC3HeaderInfo
- * Coded AC-3 header values up to the lfeon element, plus derived values.
- */
-typedef struct AC3HeaderInfo {
-    /** @name Coded elements
-     * @{
-     */
-    uint16_t sync_word;
-    uint16_t crc1;
-    uint8_t sr_code;
-    uint8_t bitstream_id;
-    uint8_t bitstream_mode;
-    uint8_t channel_mode;
-    uint8_t lfe_on;
-    uint8_t frame_type;
-    int substreamid;                        ///< substream identification
-    int center_mix_level;                   ///< Center mix level index
-    int surround_mix_level;                 ///< Surround mix level index
-    uint16_t channel_map;
-    int num_blocks;                         ///< number of audio blocks
-    int dolby_surround_mode;
-    /** @} */
-
-    /** @name Derived values
-     * @{
-     */
-    uint8_t sr_shift;
-    uint16_t sample_rate;
-    uint32_t bit_rate;
-    uint8_t channels;
-    uint16_t frame_size;
-    uint64_t channel_layout;
-    /** @} */
-} AC3HeaderInfo;
-
-typedef enum {
-    EAC3_FRAME_TYPE_INDEPENDENT = 0,
-    EAC3_FRAME_TYPE_DEPENDENT,
-    EAC3_FRAME_TYPE_AC3_CONVERT,
-    EAC3_FRAME_TYPE_RESERVED
-} EAC3FrameType;
-
-/**
  * Calculate the log power-spectral density of the input signal.
  * This gives a rough estimate of signal power in the frequency domain by using
  * the spectral envelope (exponents).  The psd is also separately grouped
diff --git a/libavcodec/ac3_parser.c b/libavcodec/ac3_parser.c
index 86e8d417eb..119b1598c5 100644
--- a/libavcodec/ac3_parser.c
+++ b/libavcodec/ac3_parser.c
@@ -25,6 +25,8 @@
 
 #include "libavutil/channel_layout.h"
 #include "parser.h"
+#include "ac3defs.h"
+#include "ac3tab.h"
 #include "ac3_parser.h"
 #include "ac3_parser_internal.h"
 #include "aac_ac3_parser.h"
diff --git a/libavcodec/ac3_parser_internal.h b/libavcodec/ac3_parser_internal.h
index 3648802a73..dd57dc95a6 100644
--- a/libavcodec/ac3_parser_internal.h
+++ b/libavcodec/ac3_parser_internal.h
@@ -21,10 +21,49 @@
 #ifndef AVCODEC_AC3_PARSER_INTERNAL_H
 #define AVCODEC_AC3_PARSER_INTERNAL_H
 
-#include "ac3.h"
+#include <stddef.h>
+#include <stdint.h>
+
+#include "ac3defs.h"
 #include "get_bits.h"
 
 /**
+ * @struct AC3HeaderInfo
+ * Coded AC-3 header values up to the lfeon element, plus derived values.
+ */
+typedef struct AC3HeaderInfo {
+    /** @name Coded elements
+     * @{
+     */
+    uint16_t sync_word;
+    uint16_t crc1;
+    uint8_t sr_code;
+    uint8_t bitstream_id;
+    uint8_t bitstream_mode;
+    uint8_t channel_mode;
+    uint8_t lfe_on;
+    uint8_t frame_type;
+    int substreamid;                        ///< substream identification
+    int center_mix_level;                   ///< Center mix level index
+    int surround_mix_level;                 ///< Surround mix level index
+    uint16_t channel_map;
+    int num_blocks;                         ///< number of audio blocks
+    int dolby_surround_mode;
+    /** @} */
+
+    /** @name Derived values
+     * @{
+     */
+    uint8_t sr_shift;
+    uint16_t sample_rate;
+    uint32_t bit_rate;
+    uint8_t channels;
+    uint16_t frame_size;
+    uint64_t channel_layout;
+    /** @} */
+} AC3HeaderInfo;
+
+/**
  * Parse AC-3 frame header.
  * Parse the header up to the lfeon element, which is the first 52 or 54 bits
  * depending on the audio coding mode.
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index fe330d0d3b..ad2b3615c8 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -43,6 +43,7 @@
 #include "ac3_parser_internal.h"
 #include "ac3dec.h"
 #include "ac3dec_data.h"
+#include "ac3defs.h"
 #include "kbdwin.h"
 
 /**
diff --git a/libavcodec/ac3dec_data.c b/libavcodec/ac3dec_data.c
index d0a9b1ec40..a3794ab223 100644
--- a/libavcodec/ac3dec_data.c
+++ b/libavcodec/ac3dec_data.c
@@ -25,7 +25,6 @@
  */
 
 #include "ac3dec_data.h"
-#include "ac3.h"
 
 /**
  * Table used to ungroup 3 values stored in 5 bits.
diff --git a/libavcodec/ac3defs.h b/libavcodec/ac3defs.h
new file mode 100644
index 0000000000..ff92f0ac4a
--- /dev/null
+++ b/libavcodec/ac3defs.h
@@ -0,0 +1,104 @@
+/*
+ * Common AC-3 definitions
+ * 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
+ */
+
+#ifndef AVCODEC_AC3DEFS_H
+#define AVCODEC_AC3DEFS_H
+
+#define EAC3_MAX_CHANNELS 16          /**< maximum number of channels in EAC3 */
+#define AC3_MAX_CHANNELS 7            /**< maximum number of channels, including coupling channel */
+#define CPL_CH 0                      /**< coupling channel index */
+
+#define AC3_MAX_COEFS   256
+#define AC3_BLOCK_SIZE  256
+#define AC3_MAX_BLOCKS    6
+#define AC3_FRAME_SIZE (AC3_MAX_BLOCKS * 256)
+#define AC3_WINDOW_SIZE (AC3_BLOCK_SIZE * 2)
+#define AC3_CRITICAL_BANDS 50
+#define AC3_MAX_CPL_BANDS  18
+
+/* exponent encoding strategy */
+#define EXP_REUSE 0
+#define EXP_NEW   1
+
+#define EXP_D15   1
+#define EXP_D25   2
+#define EXP_D45   3
+
+/** Delta bit allocation strategy */
+typedef enum {
+    DBA_REUSE = 0,
+    DBA_NEW,
+    DBA_NONE,
+    DBA_RESERVED
+} AC3DeltaStrategy;
+
+/** Channel mode (audio coding mode) */
+typedef enum {
+    AC3_CHMODE_DUALMONO = 0,
+    AC3_CHMODE_MONO,
+    AC3_CHMODE_STEREO,
+    AC3_CHMODE_3F,
+    AC3_CHMODE_2F1R,
+    AC3_CHMODE_3F1R,
+    AC3_CHMODE_2F2R,
+    AC3_CHMODE_3F2R
+} AC3ChannelMode;
+
+/** Dolby Surround mode */
+typedef enum AC3DolbySurroundMode {
+    AC3_DSURMOD_NOTINDICATED = 0,
+    AC3_DSURMOD_OFF,
+    AC3_DSURMOD_ON,
+    AC3_DSURMOD_RESERVED
+} AC3DolbySurroundMode;
+
+/** Dolby Surround EX mode */
+typedef enum AC3DolbySurroundEXMode {
+    AC3_DSUREXMOD_NOTINDICATED = 0,
+    AC3_DSUREXMOD_OFF,
+    AC3_DSUREXMOD_ON,
+    AC3_DSUREXMOD_PLIIZ
+} AC3DolbySurroundEXMode;
+
+/** Dolby Headphone mode */
+typedef enum AC3DolbyHeadphoneMode {
+    AC3_DHEADPHONMOD_NOTINDICATED = 0,
+    AC3_DHEADPHONMOD_OFF,
+    AC3_DHEADPHONMOD_ON,
+    AC3_DHEADPHONMOD_RESERVED
+} AC3DolbyHeadphoneMode;
+
+/** Preferred Stereo Downmix mode */
+typedef enum AC3PreferredStereoDownmixMode {
+    AC3_DMIXMOD_NOTINDICATED = 0,
+    AC3_DMIXMOD_LTRT,
+    AC3_DMIXMOD_LORO,
+    AC3_DMIXMOD_DPLII // reserved value in A/52, but used by encoders to indicate DPL2
+} AC3PreferredStereoDownmixMode;
+
+typedef enum {
+    EAC3_FRAME_TYPE_INDEPENDENT = 0,
+    EAC3_FRAME_TYPE_DEPENDENT,
+    EAC3_FRAME_TYPE_AC3_CONVERT,
+    EAC3_FRAME_TYPE_RESERVED
+} EAC3FrameType;
+
+#endif /* AVCODEC_AC3DEFS_H */
diff --git a/libavcodec/ac3dsp.c b/libavcodec/ac3dsp.c
index d006ca8c0a..b41f436967 100644
--- a/libavcodec/ac3dsp.c
+++ b/libavcodec/ac3dsp.c
@@ -29,8 +29,9 @@
 #include "libavutil/intmath.h"
 #include "libavutil/mem_internal.h"
 
-#include "ac3.h"
+#include "ac3defs.h"
 #include "ac3dsp.h"
+#include "ac3tab.h"
 #include "mathops.h"
 
 static void ac3_exponent_min_c(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 7efa1d122c..c57904b01b 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -47,6 +47,8 @@
 #include "audiodsp.h"
 #include "ac3dsp.h"
 #include "ac3.h"
+#include "ac3defs.h"
+#include "ac3tab.h"
 #include "fft.h"
 #include "ac3enc.h"
 #include "eac3enc.h"
diff --git a/libavcodec/ac3enc.h b/libavcodec/ac3enc.h
index d87ec94096..f0dc006759 100644
--- a/libavcodec/ac3enc.h
+++ b/libavcodec/ac3enc.h
@@ -32,6 +32,7 @@
 
 #include "libavutil/opt.h"
 #include "ac3.h"
+#include "ac3defs.h"
 #include "ac3dsp.h"
 #include "avcodec.h"
 #include "codec_internal.h"
diff --git a/libavcodec/ac3tab.c b/libavcodec/ac3tab.c
index 9344368a99..48c89a8ba0 100644
--- a/libavcodec/ac3tab.c
+++ b/libavcodec/ac3tab.c
@@ -26,7 +26,6 @@
 
 #include "libavutil/channel_layout.h"
 
-#include "ac3.h"
 #include "ac3tab.h"
 
 /**
diff --git a/libavcodec/ac3tab.h b/libavcodec/ac3tab.h
index 2d8d3a57f9..2531d80677 100644
--- a/libavcodec/ac3tab.h
+++ b/libavcodec/ac3tab.h
@@ -24,7 +24,7 @@
 
 #include <stdint.h>
 
-#include "ac3.h"
+#include "ac3defs.h"
 
 extern const uint16_t ff_ac3_frame_size_tab[38][3];
 extern const uint8_t  ff_ac3_channels_tab[8];
diff --git a/libavcodec/eac3_data.c b/libavcodec/eac3_data.c
index 2ef0e2053c..d556d35b82 100644
--- a/libavcodec/eac3_data.c
+++ b/libavcodec/eac3_data.c
@@ -27,7 +27,7 @@
 #include <stddef.h>
 
 #include "eac3_data.h"
-#include "ac3.h"
+#include "ac3defs.h"
 
 const uint8_t ff_eac3_bits_vs_hebap[20] = {
     0,  2,  3,  4,  5,  7,  8,  9,  3,  4,
diff --git a/libavcodec/mips/ac3dsp_mips.c b/libavcodec/mips/ac3dsp_mips.c
index e5cee16081..8f62c03aaf 100644
--- a/libavcodec/mips/ac3dsp_mips.c
+++ b/libavcodec/mips/ac3dsp_mips.c
@@ -56,6 +56,7 @@
 #include "config.h"
 #include "libavcodec/ac3dsp.h"
 #include "libavcodec/ac3.h"
+#include "libavcodec/ac3tab.h"
 #include "libavutil/mips/asmdefs.h"
 
 #if HAVE_INLINE_ASM
diff --git a/libavcodec/x86/ac3dsp_init.c b/libavcodec/x86/ac3dsp_init.c
index 923c3e0a31..5f20e6dc31 100644
--- a/libavcodec/x86/ac3dsp_init.c
+++ b/libavcodec/x86/ac3dsp_init.c
@@ -22,7 +22,6 @@
 #include "libavutil/attributes.h"
 #include "libavutil/x86/asm.h"
 #include "libavutil/x86/cpu.h"
-#include "libavcodec/ac3.h"
 #include "libavcodec/ac3dsp.h"
 
 void ff_ac3_exponent_min_mmx   (uint8_t *exp, int num_reuse_blocks, int nb_coefs);