#include "avcodec.h"
#include "get_bits.h"
#include <stdint.h>
Go to the source code of this file.
Data Structures | |
struct | IVIHuffDesc |
huffman codebook descriptor More... | |
struct | IVIHuffTab |
macroblock/block huffman table descriptor More... | |
struct | RVMapDesc |
run-value (RLE) table descriptor More... | |
struct | IVIMbInfo |
information for Indeo macroblock (16x16, 8x8 or 4x4) More... | |
struct | IVITile |
information for Indeo tile More... | |
struct | IVIBandDesc |
information for Indeo wavelet band More... | |
struct | IVIPlaneDesc |
color plane (luma or chroma) information More... | |
struct | IVIPicConfig |
Defines | |
#define | IVI_VLC_BITS 13 |
max number of bits of the ivi's huffman codes | |
#define | IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size)) |
calculate number of tiles in a stride | |
#define | IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size))) |
calculate number of macroblocks in a tile | |
#define | IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1))) |
convert unsigned values into signed ones (the sign is in the LSB) | |
Typedefs | |
typedef void( | InvTransformPtr )(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags) |
Declare inverse transform function types. | |
typedef void( | DCTransformPtr )(const int32_t *in, int16_t *out, uint32_t pitch, int blk_size) |
Enumerations | |
enum | { IVI_MB_HUFF = 0, IVI_BLK_HUFF = 1 } |
Functions | |
static int | ivi_pic_config_cmp (IVIPicConfig *str1, IVIPicConfig *str2) |
compare some properties of two pictures | |
static int | ivi_scale_mv (int mv, int mv_scale) |
scale motion vector | |
int | ff_ivi_create_huff_from_desc (const IVIHuffDesc *cb, VLC *vlc, int flag) |
Generate a huffman codebook from the given descriptor and convert it into the FFmpeg VLC table. | |
void | ff_ivi_init_static_vlc (void) |
Initialize static codes used for macroblock and block decoding. | |
int | ff_ivi_dec_huff_desc (GetBitContext *gb, int desc_coded, int which_tab, IVIHuffTab *huff_tab, AVCodecContext *avctx) |
Decode a huffman codebook descriptor from the bitstream and select specified huffman table. | |
int | ff_ivi_huff_desc_cmp (const IVIHuffDesc *desc1, const IVIHuffDesc *desc2) |
Compare two huffman codebook descriptors. | |
void | ff_ivi_huff_desc_copy (IVIHuffDesc *dst, const IVIHuffDesc *src) |
Copy huffman codebook descriptors. | |
int | ff_ivi_init_planes (IVIPlaneDesc *planes, const IVIPicConfig *cfg) |
Initialize planes (prepares descriptors, allocates buffers etc). | |
void | ff_ivi_free_buffers (IVIPlaneDesc *planes) |
Free planes, bands and macroblocks buffers. | |
int | ff_ivi_init_tiles (IVIPlaneDesc *planes, int tile_width, int tile_height) |
Initialize tile and macroblock descriptors. | |
int | ff_ivi_dec_tile_data_size (GetBitContext *gb) |
Decode size of the tile data. | |
int | ff_ivi_decode_blocks (GetBitContext *gb, IVIBandDesc *band, IVITile *tile) |
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. | |
void | ff_ivi_process_empty_tile (AVCodecContext *avctx, IVIBandDesc *band, IVITile *tile, int32_t mv_scale) |
Handle empty tiles by performing data copying and motion compensation respectively. | |
void | ff_ivi_output_plane (IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch) |
Convert and output the current plane. | |
uint16_t | ivi_calc_band_checksum (IVIBandDesc *band) |
Calculate band checksum from band data. | |
int | ivi_check_band (IVIBandDesc *band, const uint8_t *ref, int pitch) |
Verify that band data lies in range. | |
Variables | |
VLC | ff_ivi_mb_vlc_tabs [8] |
static macroblock Huffman tables | |
VLC | ff_ivi_blk_vlc_tabs [8] |
static block Huffman tables | |
const uint8_t | ff_ivi_vertical_scan_8x8 [64] |
Common scan patterns (defined in ivi_common.c). | |
const uint8_t | ff_ivi_horizontal_scan_8x8 [64] |
const uint8_t | ff_ivi_direct_scan_4x4 [16] |
const RVMapDesc | ff_ivi_rvmap_tabs [9] |
Run-value (RLE) tables. |
Definition in file ivi_common.h.
#define IVI_MBs_PER_TILE | ( | tile_width, | |||
tile_height, | |||||
mb_size | ) | ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size))) |
calculate number of macroblocks in a tile
Definition at line 208 of file ivi_common.h.
Referenced by ff_ivi_init_tiles().
calculate number of tiles in a stride
Definition at line 205 of file ivi_common.h.
Referenced by ff_ivi_init_tiles().
#define IVI_TOSIGNED | ( | val | ) | (-(((val) >> 1) ^ -((val) & 1))) |
convert unsigned values into signed ones (the sign is in the LSB)
Definition at line 212 of file ivi_common.h.
Referenced by decode_mb_info(), and ff_ivi_decode_blocks().
#define IVI_VLC_BITS 13 |
max number of bits of the ivi's huffman codes
Definition at line 36 of file ivi_common.h.
Referenced by decode_mb_info(), ff_ivi_create_huff_from_desc(), and ff_ivi_decode_blocks().
typedef void( DCTransformPtr)(const int32_t *in, int16_t *out, uint32_t pitch, int blk_size) |
Definition at line 80 of file ivi_common.h.
typedef void( InvTransformPtr)(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags) |
anonymous enum |
Definition at line 59 of file ivi_common.h.
int ff_ivi_create_huff_from_desc | ( | const IVIHuffDesc * | cb, | |
VLC * | vlc, | |||
int | flag | |||
) |
Generate a huffman codebook from the given descriptor and convert it into the FFmpeg VLC table.
[in] | cb | pointer to codebook descriptor |
[out] | vlc | where to place the generated VLC table |
[in] | flag | flag: 1 - for static or 0 for dynamic tables |
Definition at line 58 of file ivi_common.c.
Referenced by ff_ivi_dec_huff_desc(), and ff_ivi_init_static_vlc().
int ff_ivi_dec_huff_desc | ( | GetBitContext * | gb, | |
int | desc_coded, | |||
int | which_tab, | |||
IVIHuffTab * | huff_tab, | |||
AVCodecContext * | avctx | |||
) |
Decode a huffman codebook descriptor from the bitstream and select specified huffman table.
[in,out] | gb | the GetBit context |
[in] | desc_coded | flag signalling if table descriptor was coded |
[in] | which_tab | codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF) |
[out] | huff_tab | pointer to the descriptor of the selected table |
[in] | avctx | AVCodecContext pointer |
Definition at line 111 of file ivi_common.c.
Referenced by decode_band_hdr(), and decode_pic_hdr().
int ff_ivi_dec_tile_data_size | ( | GetBitContext * | gb | ) |
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
[in,out] | gb | the GetBit context |
Definition at line 315 of file ivi_common.c.
Referenced by decode_band().
int ff_ivi_decode_blocks | ( | GetBitContext * | gb, | |
IVIBandDesc * | band, | |||
IVITile * | tile | |||
) |
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.
[in,out] | gb | the GetBit context |
[in] | band | pointer to the band descriptor |
[in] | tile | pointer to the tile descriptor |
Definition at line 332 of file ivi_common.c.
Referenced by decode_band().
void ff_ivi_free_buffers | ( | IVIPlaneDesc * | planes | ) |
Free planes, bands and macroblocks buffers.
[in] | planes | pointer to the array of the plane descriptors |
Definition at line 229 of file ivi_common.c.
Referenced by decode_close(), and ff_ivi_init_planes().
int ff_ivi_huff_desc_cmp | ( | const IVIHuffDesc * | desc1, | |
const IVIHuffDesc * | desc2 | |||
) |
Compare two huffman codebook descriptors.
[in] | desc1 | ptr to the 1st descriptor to compare |
[in] | desc2 | ptr to the 2nd descriptor to compare |
Definition at line 155 of file ivi_common.c.
Referenced by ff_ivi_dec_huff_desc().
void ff_ivi_huff_desc_copy | ( | IVIHuffDesc * | dst, | |
const IVIHuffDesc * | src | |||
) |
Copy huffman codebook descriptors.
[out] | dst | ptr to the destination descriptor |
[in] | src | ptr to the source descriptor |
Definition at line 161 of file ivi_common.c.
Referenced by ff_ivi_dec_huff_desc().
int ff_ivi_init_planes | ( | IVIPlaneDesc * | planes, | |
const IVIPicConfig * | cfg | |||
) |
Initialize planes (prepares descriptors, allocates buffers etc).
[in,out] | planes | pointer to the array of the plane descriptors |
[in] | cfg | pointer to the ivi_pic_config structure describing picture layout |
Definition at line 167 of file ivi_common.c.
Referenced by decode_gop_header(), decode_init(), and decode_pic_hdr().
void ff_ivi_init_static_vlc | ( | void | ) |
Initialize static codes used for macroblock and block decoding.
Definition at line 92 of file ivi_common.c.
Referenced by decode_init().
int ff_ivi_init_tiles | ( | IVIPlaneDesc * | planes, | |
int | tile_width, | |||
int | tile_height | |||
) |
Initialize tile and macroblock descriptors.
[in,out] | planes | pointer to the array of the plane descriptors |
[in] | tile_width | tile width |
[in] | tile_height | tile height |
Definition at line 249 of file ivi_common.c.
Referenced by decode_gop_header(), and decode_pic_hdr().
void ff_ivi_output_plane | ( | IVIPlaneDesc * | plane, | |
uint8_t * | dst, | |||
int | dst_pitch | |||
) |
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.
[in] | plane | pointer to the descriptor of the plane being processed |
[out] | dst | pointer to the buffer receiving converted pixels |
[in] | dst_pitch | pitch for moving to the next y line |
Definition at line 610 of file ivi_common.c.
Referenced by decode_frame().
void ff_ivi_process_empty_tile | ( | AVCodecContext * | avctx, | |
IVIBandDesc * | band, | |||
IVITile * | tile, | |||
int32_t | mv_scale | |||
) |
Handle empty tiles by performing data copying and motion compensation respectively.
[in] | avctx | ptr to the AVCodecContext |
[in] | band | pointer to the band descriptor |
[in] | tile | pointer to the tile descriptor |
[in] | mv_scale | scaling factor for motion vectors |
Definition at line 474 of file ivi_common.c.
Referenced by decode_band().
uint16_t ivi_calc_band_checksum | ( | IVIBandDesc * | band | ) |
int ivi_check_band | ( | IVIBandDesc * | band, | |
const uint8_t * | ref, | |||
int | pitch | |||
) |
Verify that band data lies in range.
static int ivi_pic_config_cmp | ( | IVIPicConfig * | str1, | |
IVIPicConfig * | str2 | |||
) | [inline, static] |
compare some properties of two pictures
Definition at line 196 of file ivi_common.h.
Referenced by decode_gop_header(), and decode_pic_hdr().
static int ivi_scale_mv | ( | int | mv, | |
int | mv_scale | |||
) | [inline, static] |
scale motion vector
Definition at line 215 of file ivi_common.h.
Referenced by decode_mb_info(), and ff_ivi_process_empty_tile().
const uint8_t ff_ivi_direct_scan_4x4[16] |
const uint8_t ff_ivi_horizontal_scan_8x8[64] |
const RVMapDesc ff_ivi_rvmap_tabs[9] |
const uint8_t ff_ivi_vertical_scan_8x8[64] |
Common scan patterns (defined in ivi_common.c).
Definition at line 660 of file ivi_common.c.
Referenced by decode_gop_header().