This file contains functions and data shared by both Indeo4 and Indeo5 decoders. More...
#include "libavutil/attributes.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "mathops.h"
#include "ivi_common.h"
#include "ivi_dsp.h"
Go to the source code of this file.
Macros | |
#define | BITSTREAM_READER_LE |
Typedefs | |
typedef void(* | ivi_mc_func )(int16_t *buf, const int16_t *ref_buf, uint32_t pitch, int mc_type) |
Functions | |
static int | ivi_mc (IVIBandDesc *band, ivi_mc_func mc, int offs, int mv_x, int mv_y, int mc_type) |
static uint16_t | inv_bits (uint16_t val, int nbits) |
Reverse "nbits" bits of the value "val" and return the result in the least significant bits. | |
static int | ivi_create_huff_from_desc (const IVIHuffDesc *cb, VLC *vlc, int flag) |
void | ff_ivi_init_static_vlc (void) |
Initialize static codes used for macroblock and block decoding. | |
static void | ivi_huff_desc_copy (IVIHuffDesc *dst, const IVIHuffDesc *src) |
static int | ivi_huff_desc_cmp (const IVIHuffDesc *desc1, const IVIHuffDesc *desc2) |
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. | |
static av_cold void | ivi_free_buffers (IVIPlaneDesc *planes) |
av_cold int | ff_ivi_init_planes (IVIPlaneDesc *planes, const IVIPicConfig *cfg) |
Initialize planes (prepares descriptors, allocates buffers etc). | |
static int | ivi_init_tiles (IVIBandDesc *band, IVITile *ref_tile, int p, int b, int t_height, int t_width) |
av_cold int | ff_ivi_init_tiles (IVIPlaneDesc *planes, int tile_width, int tile_height) |
Initialize tile and macroblock descriptors. | |
static int | ivi_dec_tile_data_size (GetBitContext *gb) |
static int | ivi_dc_transform (IVIBandDesc *band, int *prev_dc, int buf_offs, int blk_size) |
static int | ivi_decode_coded_blocks (GetBitContext *gb, IVIBandDesc *band, ivi_mc_func mc, int mv_x, int mv_y, int *prev_dc, int is_intra, int mc_type, uint32_t quant, int offs, AVCodecContext *avctx) |
static int | ivi_decode_blocks (GetBitContext *gb, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx) |
static int | 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. | |
static void | ivi_output_plane (IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch) |
static int | decode_band (IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx) |
Decode an Indeo 4 or 5 band. | |
int | ff_ivi_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) |
av_cold int | ff_ivi_decode_close (AVCodecContext *avctx) |
Close Indeo5 decoder and clean up its context. |
Variables | |
const IVIHuffDesc | ff_ivi_mb_huff_desc [8] |
static macroblock huffman tables | |
const IVIHuffDesc | ff_ivi_blk_huff_desc [8] |
static block huffman tables | |
static VLC | ivi_mb_vlc_tabs [8] |
static macroblock Huffman tables | |
static VLC | ivi_blk_vlc_tabs [8] |
static block Huffman tables | |
const uint8_t | ff_ivi_vertical_scan_8x8 [64] |
Scan patterns shared between indeo4 and indeo5. | |
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. |
This file contains functions and data shared by both Indeo4 and Indeo5 decoders.
Definition in file ivi_common.c.
#define BITSTREAM_READER_LE |
Definition at line 29 of file ivi_common.c.
typedef void(* ivi_mc_func)(int16_t *buf, const int16_t *ref_buf, uint32_t pitch, int mc_type) |
Definition at line 44 of file ivi_common.c.
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Decode an Indeo 4 or 5 band.
[in,out] | ctx | ptr to the decoder context |
[in,out] | band | ptr to the band descriptor |
[in] | avctx | ptr to the AVCodecContext |
Definition at line 807 of file ivi_common.c.
Referenced by ff_ivi_decode_frame().
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 174 of file ivi_common.c.
Referenced by decode_band_hdr(), and decode_pic_hdr().
av_cold int ff_ivi_decode_close | ( | AVCodecContext * | avctx | ) |
Close Indeo5 decoder and clean up its context.
Definition at line 1017 of file ivi_common.c.
int ff_ivi_decode_frame | ( | AVCodecContext * | avctx, |
void * | data, | ||
int * | got_frame, | ||
AVPacket * | avpkt | ||
) |
Definition at line 915 of file ivi_common.c.
av_cold 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 251 of file ivi_common.c.
Referenced by decode_gop_header(), decode_init(), and decode_pic_hdr().
Initialize static codes used for macroblock and block decoding.
Definition at line 127 of file ivi_common.c.
Referenced by decode_init().
av_cold 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 358 of file ivi_common.c.
Referenced by decode_gop_header(), and decode_pic_hdr().
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Reverse "nbits" bits of the value "val" and return the result in the least significant bits.
Definition at line 71 of file ivi_common.c.
Referenced by ivi_create_huff_from_desc().
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Definition at line 93 of file ivi_common.c.
Referenced by ff_ivi_dec_huff_desc(), and ff_ivi_init_static_vlc().
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Definition at line 423 of file ivi_common.c.
Referenced by ivi_decode_blocks().
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Definition at line 406 of file ivi_common.c.
Referenced by decode_band().
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Definition at line 544 of file ivi_common.c.
Referenced by decode_band().
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Definition at line 442 of file ivi_common.c.
Referenced by ivi_decode_blocks().
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Definition at line 230 of file ivi_common.c.
Referenced by ff_ivi_decode_close(), and ff_ivi_init_planes().
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Definition at line 167 of file ivi_common.c.
Referenced by ff_ivi_dec_huff_desc().
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Definition at line 154 of file ivi_common.c.
Referenced by ff_ivi_dec_huff_desc().
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Definition at line 321 of file ivi_common.c.
Referenced by ff_ivi_init_tiles().
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Definition at line 47 of file ivi_common.c.
Referenced by ivi_decode_blocks(), ivi_decode_coded_blocks(), and ivi_process_empty_tile().
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Definition at line 782 of file ivi_common.c.
Referenced by ff_ivi_decode_frame().
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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 653 of file ivi_common.c.
Referenced by decode_band().
const IVIHuffDesc ff_ivi_blk_huff_desc |
static block huffman tables
Definition at line 1067 of file ivi_common.c.
const uint8_t ff_ivi_direct_scan_4x4[16] |
Definition at line 1104 of file ivi_common.c.
Referenced by decode_gop_header().
const uint8_t ff_ivi_horizontal_scan_8x8[64] |
Definition at line 1093 of file ivi_common.c.
Referenced by decode_gop_header().
const IVIHuffDesc ff_ivi_mb_huff_desc |
static macroblock huffman tables
These are 2x8 predefined Huffman codebooks for coding macroblock/block signals.
They are specified using "huffman descriptors" in order to avoid huge static tables. The decoding tables will be generated at startup from these descriptors.
Definition at line 1056 of file ivi_common.c.
const RVMapDesc ff_ivi_rvmap_tabs[9] |
const uint8_t ff_ivi_vertical_scan_8x8[64] |
Scan patterns shared between indeo4 and indeo5.
Common scan patterns (defined in ivi_common.c)
Definition at line 1082 of file ivi_common.c.
Referenced by decode_gop_header().
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static block Huffman tables
Definition at line 42 of file ivi_common.c.
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static macroblock Huffman tables
Definition at line 41 of file ivi_common.c.