indent

[ffmpeg] / libavcodec / ac3.h

diff --git a/libavcodec/ac3.h b/libavcodec/ac3.h
index 7611e5723730faf7556dd42e6c259a87ba6d4c7e..3b18a15a7c00e265dc5fecc8408614633e8f4d3d 100644 (file)
--- a/libavcodec/ac3.h
+++ b/libavcodec/ac3.h
@@ -1,5 +1,5 @@
 /*
- * Common code between AC3 encoder and decoder
+ * Common code between the AC-3 encoder and decoder
  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
  *
  * This file is part of FFmpeg.
@@ -21,7 +21,7 @@
 
 /**
  * @file ac3.h
- * Common code between AC3 encoder and decoder.
+ * Common code between the AC-3 encoder and decoder.
  */
 
 #ifndef FFMPEG_AC3_H
@@ -32,7 +32,7 @@
 #define AC3_MAX_CODED_FRAME_SIZE 3840 /* in bytes */
 #define AC3_MAX_CHANNELS 6 /* including LFE channel */
 
-#define NB_BLOCKS 6 /* number of PCM blocks inside an AC3 frame */
+#define NB_BLOCKS 6 /* number of PCM blocks inside an AC-3 frame */
 #define AC3_FRAME_SIZE (NB_BLOCKS * 256)
 
 /* exponent encoding strategy */
@@ -53,14 +53,14 @@ typedef enum {
 
 /** Channel mode (audio coding mode) */
 typedef enum {
-    AC3_ACMOD_DUALMONO = 0,
-    AC3_ACMOD_MONO,
-    AC3_ACMOD_STEREO,
-    AC3_ACMOD_3F,
-    AC3_ACMOD_2F1R,
-    AC3_ACMOD_3F1R,
-    AC3_ACMOD_2F2R,
-    AC3_ACMOD_3F2R
+    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;
 
 typedef struct AC3BitAllocParameters {
@@ -81,14 +81,15 @@ typedef struct {
     uint16_t sync_word;
     uint16_t crc1;
     uint8_t sr_code;
-    uint8_t frmsizecod;
-    uint8_t bsid;
-    uint8_t bsmod;
-    uint8_t acmod;
-    uint8_t cmixlev;
-    uint8_t surmixlev;
-    uint8_t dsurmod;
-    uint8_t lfeon;
+    uint8_t bitstream_id;
+    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
     /** @} */
 
     /** @defgroup derived Derived values
@@ -102,6 +103,12 @@ typedef struct {
     /** @} */
 } AC3HeaderInfo;
 
+typedef enum {
+    EAC3_FRAME_TYPE_INDEPENDENT = 0,
+    EAC3_FRAME_TYPE_DEPENDENT,
+    EAC3_FRAME_TYPE_AC3_CONVERT,
+    EAC3_FRAME_TYPE_RESERVED
+} EAC3FrameType;
 
 void ac3_common_init(void);
 
@@ -161,10 +168,12 @@ void ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,
  * @param[in]  end        ending bin location
  * @param[in]  snr_offset SNR adjustment
  * @param[in]  floor      noise floor
+ * @param[in]  bap_tab    look-up table for bit allocation pointers
  * @param[out] bap        bit allocation pointers
  */
 void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
-                               int snr_offset, int floor, uint8_t *bap);
+                               int snr_offset, int floor,
+                               const uint8_t *bap_tab, uint8_t *bap);
 
 void ac3_parametric_bit_allocation(AC3BitAllocParameters *s, uint8_t *bap,
                                    int8_t *exp, int start, int end,