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FFmpeg
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#include <stdint.h>Go to the source code of this file.
Data Structures | |
| struct | VLCElem |
| struct | VLC |
| struct | VLC_MULTI_ELEM |
| struct | VLC_MULTI |
| struct | RL_VLC_ELEM |
Macros | |
| #define | VLC_MULTI_MAX_SYMBOLS 6 |
| #define | vlc_init(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, codes, codes_wrap, codes_size, flags) |
| #define | VLC_INIT_USE_STATIC 1 |
| #define | VLC_INIT_STATIC_OVERLONG (2 | VLC_INIT_USE_STATIC) |
| #define | VLC_INIT_INPUT_LE 4 |
| #define | VLC_INIT_OUTPUT_LE 8 |
| #define | VLC_INIT_LE (VLC_INIT_INPUT_LE | VLC_INIT_OUTPUT_LE) |
| #define | VLC_INIT_CUSTOM_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, flags, static_size) |
| #define | VLC_INIT_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, static_size) |
| #define | VLC_INIT_LE_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, static_size) |
| #define | VLC_INIT_CUSTOM_STATIC(vlc, bits, a, b, c, d, e, f, g, flags, static_size) |
| #define | VLC_INIT_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) VLC_INIT_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, NULL, 0, 0, static_size) |
| #define | VLC_INIT_LE_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) VLC_INIT_LE_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, NULL, 0, 0, static_size) |
| #define | VLC_INIT_STATIC_FROM_LENGTHS(vlc, bits, nb_codes, lens, len_wrap, symbols, symbols_wrap, symbols_size, offset, flags, static_size) |
Typedefs | |
| typedef int16_t | VLCBaseType |
Functions | |
| int | ff_vlc_init_sparse (VLC *vlc, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags) |
| Build VLC decoding tables suitable for use with get_vlc2(). More... | |
| int | ff_vlc_init_from_lengths (VLC *vlc, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx) |
| Build VLC decoding tables suitable for use with get_vlc2() More... | |
| int | ff_vlc_init_multi_from_lengths (VLC *vlc, VLC_MULTI *multi, int nb_bits, int nb_elems, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx) |
| Build VLC decoding tables suitable for use with get_vlc_multi() More... | |
| void | ff_vlc_free_multi (VLC_MULTI *vlc) |
| void | ff_vlc_free (VLC *vlc) |
| #define VLC_INIT_STATIC_OVERLONG (2 | VLC_INIT_USE_STATIC) |
| #define VLC_INIT_LE (VLC_INIT_INPUT_LE | VLC_INIT_OUTPUT_LE) |
| #define VLC_INIT_STATIC_FROM_LENGTHS | ( | vlc, | |
| bits, | |||
| nb_codes, | |||
| lens, | |||
| len_wrap, | |||
| symbols, | |||
| symbols_wrap, | |||
| symbols_size, | |||
| offset, | |||
| flags, | |||
| static_size | |||
| ) |
| typedef int16_t VLCBaseType |
| int ff_vlc_init_sparse | ( | VLC * | vlc, |
| int | nb_bits, | ||
| int | nb_codes, | ||
| const void * | bits, | ||
| int | bits_wrap, | ||
| int | bits_size, | ||
| const void * | codes, | ||
| int | codes_wrap, | ||
| int | codes_size, | ||
| const void * | symbols, | ||
| int | symbols_wrap, | ||
| int | symbols_size, | ||
| int | flags | ||
| ) |
Build VLC decoding tables suitable for use with get_vlc2().
| [in,out] | vlc | The VLC to be initialized; table and table_allocated must have been set when initializing a static VLC, otherwise this will be treated as uninitialized. |
| [in] | nb_bits | The number of bits to use for the VLC table; higher values take up more memory and cache, but allow to read codes with fewer reads. Corresponds to the bits parameter of get_vlc2(). |
| [in] | nb_codes | The number of provided bits, codes and (if supplied) symbol entries. |
| [in] | bits | The lengths (in bits) of the codes. Entries > 0 correspond to valid codes; entries == 0 will be skipped. |
| [in] | bits_wrap | Stride (in bytes) of the bits table. |
| [in] | codes_size | Size of the bits. 1, 2 and 4 are supported. |
| [in] | codes | Table which gives the bit pattern of of each vlc code. |
| [in] | codes_wrap | Stride (in bytes) of the codes table. |
| [in] | codes_size | Size of the codes. 1, 2 and 4 are supported. |
| [in] | symbols | The symbols, i.e. what is returned from get_vlc2() when the corresponding code is encountered. May be NULL, then 0, 1, 2, 3, 4,... will be used. |
| [in] | symbols_wrap | Stride (in bytes) of the symbols table. |
| [in] | symbols_size | Size of the symbols. 1 and 2 are supported. |
| [in] | flags | A combination of the VLC_INIT_* flags. |
'wrap' and 'size' make it possible to use any memory configuration and types (byte/word/int) to store the 'bits', 'codes', and 'symbols' tables.
Definition at line 250 of file vlc.c.
Referenced by aac_static_table_init(), build_huff(), build_huff_tree(), build_vlc(), ccitt_unpack_init(), dnxhd_init_vlc(), generate_joint_tables(), huf_build_dec_table(), init_ralf_vlc(), read_hufftable(), and rv34_gen_vlc().
| int ff_vlc_init_from_lengths | ( | VLC * | vlc, |
| int | nb_bits, | ||
| int | nb_codes, | ||
| const int8_t * | lens, | ||
| int | lens_wrap, | ||
| const void * | symbols, | ||
| int | symbols_wrap, | ||
| int | symbols_size, | ||
| int | offset, | ||
| int | flags, | ||
| void * | logctx | ||
| ) |
Build VLC decoding tables suitable for use with get_vlc2()
This function takes lengths and symbols and calculates the codes from them. For this the input lengths and symbols have to be sorted according to "left nodes in the corresponding tree first".
| [in,out] | vlc | The VLC to be initialized; table and table_allocated must have been set when initializing a static VLC, otherwise this will be treated as uninitialized. |
| [in] | nb_bits | The number of bits to use for the VLC table; higher values take up more memory and cache, but allow to read codes with fewer reads. |
| [in] | nb_codes | The number of provided length and (if supplied) symbol entries. |
| [in] | lens | The lengths of the codes. Entries > 0 correspond to valid codes; entries == 0 will be skipped and entries with len < 0 indicate that the tree is incomplete and has an open end of length -len at this position. |
| [in] | lens_wrap | Stride (in bytes) of the lengths. |
| [in] | symbols | The symbols, i.e. what is returned from get_vlc2() when the corresponding code is encountered. May be NULL, then 0, 1, 2, 3, 4,... will be used. |
| [in] | symbols_wrap | Stride (in bytes) of the symbols. |
| [in] | symbols_size | Size of the symbols. 1 and 2 are supported. |
| [in] | offset | An offset to apply to all the valid symbols. |
| [in] | flags | A combination of the VLC_INIT_* flags; notice that VLC_INIT_INPUT_LE is pointless and ignored. |
Definition at line 306 of file vlc.c.
Referenced by atrac3_init_static_data(), atrac9_init_vlc(), build_canonical_huff(), build_vlc(), cfhd_init_vlc(), clv_init_static(), dv_init_static(), ff_mjpeg_build_vlc(), imc_init_static(), mobiclip_init_static(), mp_decode_frame(), mpc7_init_static(), mpegaudiodec_common_init_static(), mss4_init_vlc(), on2avc_decode_init(), qdmc_init_static_data(), read_code_table(), read_simple_vlc_prefix(), read_vlc_prefix(), rv10_build_vlc(), rv40_init_table(), rv40_init_tables(), smacker_decode_header_tree(), smka_decode_frame(), tm2_build_huff_table(), tscc2_init_vlc(), vp3_decode_init(), wma_decode_init(), and x8_init_vlc().
| int ff_vlc_init_multi_from_lengths | ( | VLC * | vlc, |
| VLC_MULTI * | multi, | ||
| int | nb_bits, | ||
| int | nb_elems, | ||
| int | nb_codes, | ||
| const int8_t * | lens, | ||
| int | lens_wrap, | ||
| const void * | symbols, | ||
| int | symbols_wrap, | ||
| int | symbols_size, | ||
| int | offset, | ||
| int | flags, | ||
| void * | logctx | ||
| ) |
Build VLC decoding tables suitable for use with get_vlc_multi()
This function takes lengths and symbols and calculates the codes from them. For this the input lengths and symbols have to be sorted according to "left nodes in the corresponding tree first".
| [in,out] | vlc | The VLC to be initialized; table and table_allocated must have been set when initializing a static VLC, otherwise this will be treated as uninitialized. |
| [in,out] | multi | The VLC_MULTI to be initialized; table and table_allocated must have been set when initializing a static VLC, otherwise this will be treated as uninitialized. |
| [in] | nb_bits | The number of bits to use for the VLC table; higher values take up more memory and cache, but allow to read codes with fewer reads. |
| [in] | nb_elems | The max possible number of elements. |
| [in] | nb_codes | The number of provided length and (if supplied) symbol entries. |
| [in] | lens | The lengths of the codes. Entries > 0 correspond to valid codes; entries == 0 will be skipped and entries with len < 0 indicate that the tree is incomplete and has an open end of length -len at this position. |
| [in] | lens_wrap | Stride (in bytes) of the lengths. |
| [in] | symbols | The symbols, i.e. what is returned from get_vlc2() when the corresponding code is encountered. May be NULL, then 0, 1, 2, 3, 4,... will be used. |
| [in] | symbols_wrap | Stride (in bytes) of the symbols. |
| [in] | symbols_size | Size of the symbols. 1 and 2 are supported. |
| [in] | offset | An offset to apply to all the valid symbols. |
| [in] | flags | A combination of the VLC_INIT_* flags; notice that VLC_INIT_INPUT_LE is pointless and ignored. |
Definition at line 446 of file vlc.c.
Referenced by build_huff(), and huff_build().
| void ff_vlc_free_multi | ( | VLC_MULTI * | vlc | ) |
Definition at line 504 of file vlc.c.
Referenced by decode_plane(), decode_plane10(), ff_vlc_init_multi_from_lengths(), huff_build(), and magy_decode_end().
| void ff_vlc_free | ( | VLC * | vlc | ) |
Definition at line 509 of file vlc.c.
Referenced by build_huff(), build_vlc(), cfhd_init_vlc(), cook_decode_close(), decode_argb_frame(), decode_close(), decode_end(), decode_plane(), decode_plane10(), decode_rgb24_frame(), decode_rle(), decode_yuv_frame(), dist_bundle_close(), dnxhd_decode_close(), dnxhd_init_vlc(), ff_ivi_dec_huff_desc(), ff_ivi_decode_close(), ff_mjpeg_decode_dht(), ff_mjpeg_decode_end(), ff_wma_end(), fraps2_decode_plane(), generate_joint_tables(), hq_hqa_decode_close(), hqx_decode_close(), huf_build_dec_table(), huff_build(), image_ctx_free(), init_default_huffman_tables(), ivi_free_buffers(), jpg_free_context(), magy_decode_end(), mp_decode_frame(), on2avc_free_vlcs(), photocd_decode_close(), read_huffman_code_normal(), read_huffman_tables(), read_hufftable(), read_old_huffman_tables(), read_vlc_prefix(), smacker_decode_header_tree(), smka_decode_frame(), tm2_free_codes(), vorbis_free(), vp3_decode_end(), vp6_build_huff_tree(), and vp6_decode_free_context().
1.8.17