Move AVMediaType from libavcodec to libavutil.

[ffmpeg] / libavcodec / ivi_common.h

diff --git a/libavcodec/ivi_common.h b/libavcodec/ivi_common.h
index 72c5c7a889e8275aca9de7c1d7289603224da77d..ef0a0f4917dba7e265693ac2baf1f321f4a7389a 100644 (file)
--- a/libavcodec/ivi_common.h
+++ b/libavcodec/ivi_common.h
@@ -45,8 +45,26 @@ typedef struct {
     uint8_t     xbits[16];
 } IVIHuffDesc;
 
-extern const IVIHuffDesc ff_ivi_mb_huff_desc[8];  ///< static macroblock huffman tables
-extern const IVIHuffDesc ff_ivi_blk_huff_desc[8]; ///< static block huffman tables
+/**
+ *  macroblock/block huffman table descriptor
+ */
+typedef struct {
+    int32_t     tab_sel;    /// index of one of the predefined tables
+                            /// or "7" for custom one
+    VLC         *tab;       /// pointer to the table associated with tab_sel
+
+    //! the following are used only when tab_sel == 7
+    IVIHuffDesc cust_desc;  /// custom Huffman codebook descriptor
+    VLC         cust_tab;   /// vlc table for custom codebook
+} IVIHuffTab;
+
+enum {
+    IVI_MB_HUFF   = 0,      /// Huffman table is used for coding macroblocks
+    IVI_BLK_HUFF  = 1       /// Huffman table is used for coding blocks
+};
+
+extern VLC ff_ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables
+extern VLC ff_ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
 
 
 /**
@@ -118,10 +136,7 @@ typedef struct {
     int             glob_quant;     ///< quant base for this band
     const uint8_t   *scan;          ///< ptr to the scan pattern
 
-    int             huff_sel;       ///< huffman table for this band
-    IVIHuffDesc     huff_desc;      ///< table descriptor associated with the selector above
-    VLC             *blk_vlc;       ///< ptr to the vlc table for decoding block data
-    VLC             blk_vlc_cust;   ///< custom block vlc table
+    IVIHuffTab      blk_vlc;        ///< vlc table for decoding block data
 
     uint16_t        *dequant_intra; ///< ptr to dequant tables for intra blocks
     uint16_t        *dequant_inter; ///< ptr dequant tables for inter blocks
@@ -183,7 +198,6 @@ static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
     ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
 
 /** convert unsigned values into signed ones (the sign is in the LSB) */
-/* TODO: find a way to calculate this without the conditional using bit magic */
 #define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
 
 /** scales motion vector */
@@ -204,14 +218,23 @@ static inline int ivi_scale_mv(int mv, int mv_scale)
 int  ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag);
 
 /**
- *  Decodes a huffman codebook descriptor from the bitstream.
+ * Initializes static codes used for macroblock and block decoding.
+ */
+void ff_ivi_init_static_vlc(void);
+
+/**
+ *  Decodes a huffman codebook descriptor from the bitstream
+ *  and selects specified huffman table.
  *
- *  @param gb   [in,out] the GetBit context
- *  @param desc [out] ptr to descriptor to be filled with data
- *  @return     selector indicating huffman table:
- *              (0...6 - predefined, 7 - custom one supplied with the bitstream)
+ *  @param gb           [in,out] the GetBit context
+ *  @param desc_coded   [in] flag signalling if table descriptor was coded
+ *  @param which_tab    [in] codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF)
+ *  @param huff_tab     [out] pointer to the descriptor of the selected table
+ *  @param avctx        [in] AVCodecContext pointer
+ *  @return             zero on success, negative value otherwise
  */
-int  ff_ivi_dec_huff_desc(GetBitContext *gb, IVIHuffDesc *desc);
+int  ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
+                          IVIHuffTab *huff_tab, AVCodecContext *avctx);
 
 /**
  *  Compares two huffman codebook descriptors.