*
* Copyright (c) 2009 Maxim Poliakovski
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "get_bits.h"
#include <stdint.h>
-#define IVI_DEBUG 0
-
#define IVI_VLC_BITS 13 ///< max number of bits of the ivi's huffman codes
+#define IVI4_STREAM_ANALYSER 0
+#define IVI5_IS_PROTECTED 0x20
/**
* huffman codebook descriptor
*/
-typedef struct {
+typedef struct IVIHuffDesc {
int32_t num_rows;
uint8_t xbits[16];
} IVIHuffDesc;
/**
* macroblock/block huffman table descriptor
*/
-typedef struct {
+typedef struct IVIHuffTab {
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
+ /// 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;
extern VLC ff_ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
+/**
+ * Common scan patterns (defined in ivi_common.c)
+ */
+extern const uint8_t ff_ivi_vertical_scan_8x8[64];
+extern const uint8_t ff_ivi_horizontal_scan_8x8[64];
+extern const uint8_t ff_ivi_direct_scan_4x4[16];
+
+
+/**
+ * Declare inverse transform function types
+ */
+typedef void (InvTransformPtr)(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags);
+typedef void (DCTransformPtr) (const int32_t *in, int16_t *out, uint32_t pitch, int blk_size);
+
+
/**
* run-value (RLE) table descriptor
*/
-typedef struct {
+typedef struct RVMapDesc {
uint8_t eob_sym; ///< end of block symbol
uint8_t esc_sym; ///< escape symbol
uint8_t runtab[256];
/**
* information for Indeo macroblock (16x16, 8x8 or 4x4)
*/
-typedef struct {
+typedef struct IVIMbInfo {
int16_t xpos;
int16_t ypos;
uint32_t buf_offs; ///< address in the output buffer for this mb
uint8_t type; ///< macroblock type: 0 - INTRA, 1 - INTER
uint8_t cbp; ///< coded block pattern
- uint8_t q_delta; ///< quant delta
+ int8_t q_delta; ///< quant delta
int8_t mv_x; ///< motion vector (x component)
int8_t mv_y; ///< motion vector (y component)
} IVIMbInfo;
/**
* information for Indeo tile
*/
-typedef struct {
+typedef struct IVITile {
int xpos;
int ypos;
int width;
int height;
+ int mb_size;
int is_empty; ///< = 1 if this tile doesn't contain any data
int data_size; ///< size of the data in bytes
int num_MBs; ///< number of macroblocks in this tile
/**
* information for Indeo wavelet band
*/
-typedef struct {
+typedef struct IVIBandDesc {
int plane; ///< plane number this band belongs to
int band_num; ///< band number
int width;
int height;
+ int aheight; ///< aligned band height
const uint8_t *data_ptr; ///< ptr to the first byte of the band data
int data_size; ///< size of the band data
int16_t *buf; ///< pointer to the output buffer for this band
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
int num_corr; ///< number of correction entries
uint8_t corr[61*2]; ///< rvmap correction pairs
int rvmap_sel; ///< rvmap table selector
RVMapDesc *rv_map; ///< ptr to the RLE table for this band
int num_tiles; ///< number of tiles in this band
IVITile *tiles; ///< array of tile descriptors
- void (*inv_transform)(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags); ///< inverse transform function pointer
- void (*dc_transform) (const int32_t *in, int16_t *out, uint32_t pitch, int blk_size); ///< dc transform function pointer, it may be NULL
+ InvTransformPtr *inv_transform;
+ DCTransformPtr *dc_transform;
int is_2d_trans; ///< 1 indicates that the two-dimensional inverse transform is used
int32_t checksum; ///< for debug purposes
int checksum_present;
int bufsize; ///< band buffer size in bytes
- const uint8_t *intra_base; ///< quantization matrix for intra blocks
- const uint8_t *inter_base; ///< quantization matrix for inter blocks
+ const uint16_t *intra_base; ///< quantization matrix for intra blocks
+ const uint16_t *inter_base; ///< quantization matrix for inter blocks
const uint8_t *intra_scale; ///< quantization coefficient for intra blocks
const uint8_t *inter_scale; ///< quantization coefficient for inter blocks
} IVIBandDesc;
/**
* color plane (luma or chroma) information
*/
-typedef struct {
+typedef struct IVIPlaneDesc {
uint16_t width;
uint16_t height;
uint8_t num_bands; ///< number of bands this plane subdivided into
} IVIPlaneDesc;
-typedef struct {
+typedef struct IVIPicConfig {
uint16_t pic_width;
uint16_t pic_height;
uint16_t chroma_width;
uint8_t chroma_bands;
} IVIPicConfig;
-/** compares some properties of two pictures */
+typedef struct IVI45DecContext {
+ GetBitContext gb;
+ AVFrame frame;
+ RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables
+
+ uint32_t frame_num;
+ int frame_type;
+ int prev_frame_type; ///< frame type of the previous frame
+ uint32_t data_size; ///< size of the frame data in bytes from picture header
+ int is_scalable;
+ int transp_status; ///< transparency mode status: 1 - enabled
+ const uint8_t *frame_data; ///< input frame data pointer
+ int inter_scal; ///< signals a sequence of scalable inter frames
+ uint32_t frame_size; ///< frame size in bytes
+ uint32_t pic_hdr_size; ///< picture header size in bytes
+ uint8_t frame_flags;
+ uint16_t checksum; ///< frame checksum
+
+ IVIPicConfig pic_conf;
+ IVIPlaneDesc planes[3]; ///< color planes
+
+ int buf_switch; ///< used to switch between three buffers
+ int dst_buf; ///< buffer index for the currently decoded frame
+ int ref_buf; ///< inter frame reference buffer index
+ int ref2_buf; ///< temporal storage for switching buffers
+
+ IVIHuffTab mb_vlc; ///< current macroblock table descriptor
+ IVIHuffTab blk_vlc; ///< current block table descriptor
+
+ uint8_t rvmap_sel;
+ uint8_t in_imf;
+ uint8_t in_q; ///< flag for explicitly stored quantiser delta
+ uint8_t pic_glob_quant;
+ uint8_t unknown1;
+
+ uint16_t gop_hdr_size;
+ uint8_t gop_flags;
+ uint32_t lock_word;
+
+#if IVI4_STREAM_ANALYSER
+ uint8_t has_b_frames;
+ uint8_t has_transp;
+ uint8_t uses_tiling;
+ uint8_t uses_haar;
+ uint8_t uses_fullpel;
+#endif
+
+ int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx);
+ int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx);
+ int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx);
+ void (*switch_buffers) (struct IVI45DecContext *ctx);
+ int (*is_nonnull_frame)(struct IVI45DecContext *ctx);
+
+ int gop_invalid;
+} IVI45DecContext;
+
+/** compare some properties of two pictures */
static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
{
- return (str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height ||
- str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height ||
- str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height ||
- str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands);
+ return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height ||
+ str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height ||
+ str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height ||
+ str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands;
}
/** calculate number of tiles in a stride */
/** convert unsigned values into signed ones (the sign is in the LSB) */
#define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
-/** scales motion vector */
+/** scale motion vector */
static inline int ivi_scale_mv(int mv, int mv_scale)
{
return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
}
/**
- * Generates a huffman codebook from the given descriptor
- * and converts it into the FFmpeg VLC table.
+ * Generate a huffman codebook from the given descriptor
+ * and convert it into the Libav VLC table.
*
- * @param cb [in] pointer to codebook descriptor
- * @param vlc [out] where to place the generated VLC table
- * @param flag [in] flag: 1 - for static or 0 for dynamic tables
+ * @param[in] cb pointer to codebook descriptor
+ * @param[out] vlc where to place the generated VLC table
+ * @param[in] flag flag: 1 - for static or 0 for dynamic tables
* @return result code: 0 - OK, -1 = error (invalid codebook descriptor)
*/
int ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag);
/**
- * Initializes static codes used for macroblock and block decoding.
+ * Initialize 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.
+ * Decode a huffman codebook descriptor from the bitstream
+ * and select specified huffman table.
*
- * @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
+ * @param[in,out] gb the GetBit context
+ * @param[in] desc_coded flag signalling if table descriptor was coded
+ * @param[in] which_tab codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF)
+ * @param[out] huff_tab pointer to the descriptor of the selected table
+ * @param[in] avctx AVCodecContext pointer
* @return zero on success, negative value otherwise
*/
int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
IVIHuffTab *huff_tab, AVCodecContext *avctx);
/**
- * Compares two huffman codebook descriptors.
+ * Compare two huffman codebook descriptors.
*
- * @param desc1 [in] ptr to the 1st descriptor to compare
- * @param desc2 [in] ptr to the 2nd descriptor to compare
+ * @param[in] desc1 ptr to the 1st descriptor to compare
+ * @param[in] desc2 ptr to the 2nd descriptor to compare
* @return comparison result: 0 - equal, 1 - not equal
*/
int ff_ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2);
/**
- * Copies huffman codebook descriptors.
+ * Copy huffman codebook descriptors.
*
- * @param dst [out] ptr to the destination descriptor
- * @param src [in] ptr to the source descriptor
+ * @param[out] dst ptr to the destination descriptor
+ * @param[in] src ptr to the source descriptor
*/
void ff_ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src);
/**
- * Initializes planes (prepares descriptors, allocates buffers etc).
+ * Initialize planes (prepares descriptors, allocates buffers etc).
*
- * @param planes [in,out] pointer to the array of the plane descriptors
- * @param cfg [in] pointer to the ivi_pic_config structure describing picture layout
+ * @param[in,out] planes pointer to the array of the plane descriptors
+ * @param[in] cfg pointer to the ivi_pic_config structure describing picture layout
* @return result code: 0 - OK
*/
int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg);
/**
- * Frees planes, bands and macroblocks buffers.
+ * Free planes, bands and macroblocks buffers.
*
- * @param planes [in] pointer to the array of the plane descriptors
+ * @param[in] planes pointer to the array of the plane descriptors
*/
void ff_ivi_free_buffers(IVIPlaneDesc *planes);
/**
- * Initializes tile and macroblock descriptors.
+ * Initialize tile and macroblock descriptors.
*
- * @param planes [in,out] pointer to the array of the plane descriptors
- * @param tile_width [in] tile width
- * @param tile_height [in] tile height
+ * @param[in,out] planes pointer to the array of the plane descriptors
+ * @param[in] tile_width tile width
+ * @param[in] tile_height tile height
* @return result code: 0 - OK
*/
int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height);
/**
- * Decodes size of the tile data.
+ * Decode size of the tile data.
* The size is stored as a variable-length field having the following format:
* if (tile_data_size < 255) than this field is only one byte long
* if (tile_data_size >= 255) than this field four is byte long: 0xFF X1 X2 X3
* where X1-X3 is size of the tile data
*
- * @param gb [in,out] the GetBit context
+ * @param[in,out] gb the GetBit context
* @return size of the tile data in bytes
*/
int ff_ivi_dec_tile_data_size(GetBitContext *gb);
/**
- * Decodes block data:
- * extracts huffman-coded transform coefficients from the bitstream,
- * dequantizes them, applies inverse transform and motion compensation
+ * Decode block data:
+ * extract huffman-coded transform coefficients from the bitstream,
+ * dequantize them, apply inverse transform and motion compensation
* in order to reconstruct the picture.
*
- * @param gb [in,out] the GetBit context
- * @param band [in] pointer to the band descriptor
- * @param tile [in] pointer to the tile descriptor
+ * @param[in,out] gb the GetBit context
+ * @param[in] band pointer to the band descriptor
+ * @param[in] tile pointer to the tile descriptor
* @return result code: 0 - OK, -1 = error (corrupted blocks data)
*/
int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile);
/**
- * Handles empty tiles by performing data copying and motion
- * compensation respectively.
- *
- * @param avctx [in] ptr to the AVCodecContext
- * @param band [in] pointer to the band descriptor
- * @param tile [in] pointer to the tile descriptor
- * @param mv_scale [in] scaling factor for motion vectors
- */
-void ff_ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
- IVITile *tile, int32_t mv_scale);
-
-/**
- * Converts and outputs the current plane.
+ * Convert and output the current plane.
* This conversion is done by adding back the bias value of 128
* (subtracted in the encoder) and clipping the result.
*
- * @param plane [in] pointer to the descriptor of the plane being processed
- * @param dst [out] pointer to the buffer receiving converted pixels
- * @param dst_pitch [in] pitch for moving to the next y line
+ * @param[in] plane pointer to the descriptor of the plane being processed
+ * @param[out] dst pointer to the buffer receiving converted pixels
+ * @param[in] dst_pitch pitch for moving to the next y line
*/
void ff_ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch);
-#if IVI_DEBUG
-/**
- * Calculates band checksum from band data.
- */
-uint16_t ivi_calc_band_checksum (IVIBandDesc *band);
-
-/**
- * Verifies that band data lies in range.
- */
-int ivi_check_band (IVIBandDesc *band, const uint8_t *ref, int pitch);
-#endif
+int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
+ AVPacket *avpkt);
+av_cold int ff_ivi_decode_close(AVCodecContext *avctx);
#endif /* AVCODEC_IVI_COMMON_H */
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