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238 lines
5.9 KiB
238 lines
5.9 KiB
/////////////////////////////////////////////////////////////////////////////// |
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// |
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/// \file filter_decoder.c |
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/// \brief Filter ID mapping to filter-specific functions |
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// |
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// Author: Lasse Collin |
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// |
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// This file has been put into the public domain. |
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// You can do whatever you want with this file. |
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// |
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/////////////////////////////////////////////////////////////////////////////// |
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#include "filter_encoder.h" |
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#include "lzma_encoder.h" |
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#ifdef HAVE_DECODER_LZMA2 |
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#include "lzma2_encoder.h" |
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#endif |
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#if defined(HAVE_DECODER_X86) || \ |
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defined(HAVE_DECODER_POWERPC) || \ |
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defined(HAVE_DECODER_IA64) || \ |
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defined(HAVE_DECODER_ARM) || \ |
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defined(HAVE_DECODER_ARMTHUMB) || \ |
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defined(HAVE_DECODER_SPARC) |
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#include "simple_encoder.h" |
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#endif |
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#ifdef HAVE_DECODER_DELTA |
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#include "delta_encoder.h" |
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#endif |
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typedef struct { |
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/// Filter ID |
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lzma_vli id; |
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/// Initializes the filter encoder and calls lzma_next_filter_init() |
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/// for filters + 1. |
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lzma_init_function init; |
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/// Calculates memory usage of the encoder. If the options are |
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/// invalid, UINT64_MAX is returned. |
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uint64_t (*memusage)(const void *options); |
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/// Calculates the recommended Uncompressed Size for .xz Blocks to |
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/// which the input data can be split to make multithreaded |
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/// encoding possible. If this is NULL, it is assumed that |
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/// the encoder is fast enough with single thread. |
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uint64_t (*block_size)(const void *options); |
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/// Tells the size of the Filter Properties field. If options are |
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/// invalid, UINT32_MAX is returned. If this is NULL, props_size_fixed |
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/// is used. |
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lzma_ret (*props_size_get)(uint32_t *size, const void *options); |
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uint32_t props_size_fixed; |
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/// Encodes Filter Properties. |
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/// |
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/// \return - LZMA_OK: Properties encoded successfully. |
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/// - LZMA_OPTIONS_ERROR: Unsupported options |
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/// - LZMA_PROG_ERROR: Invalid options or not enough |
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/// output space |
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lzma_ret (*props_encode)(const void *options, uint8_t *out); |
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} lzma_filter_encoder; |
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static const lzma_filter_encoder encoders[] = { |
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#ifdef HAVE_ENCODER_LZMA1 |
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{ |
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.id = LZMA_FILTER_LZMA1, |
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.init = &lzma_lzma_encoder_init, |
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.memusage = &lzma_lzma_encoder_memusage, |
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.block_size = NULL, // FIXME |
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.props_size_get = NULL, |
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.props_size_fixed = 5, |
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.props_encode = &lzma_lzma_props_encode, |
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}, |
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#endif |
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#ifdef HAVE_ENCODER_LZMA2 |
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{ |
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.id = LZMA_FILTER_LZMA2, |
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.init = &lzma_lzma2_encoder_init, |
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.memusage = &lzma_lzma2_encoder_memusage, |
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.block_size = &lzma_lzma2_block_size, // FIXME |
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.props_size_get = NULL, |
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.props_size_fixed = 1, |
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.props_encode = &lzma_lzma2_props_encode, |
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}, |
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#endif |
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#ifdef HAVE_ENCODER_X86 |
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{ |
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.id = LZMA_FILTER_X86, |
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.init = &lzma_simple_x86_encoder_init, |
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.memusage = NULL, |
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.block_size = NULL, |
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.props_size_get = &lzma_simple_props_size, |
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.props_encode = &lzma_simple_props_encode, |
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}, |
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#endif |
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#ifdef HAVE_ENCODER_POWERPC |
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{ |
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.id = LZMA_FILTER_POWERPC, |
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.init = &lzma_simple_powerpc_encoder_init, |
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.memusage = NULL, |
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.block_size = NULL, |
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.props_size_get = &lzma_simple_props_size, |
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.props_encode = &lzma_simple_props_encode, |
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}, |
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#endif |
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#ifdef HAVE_ENCODER_IA64 |
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{ |
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.id = LZMA_FILTER_IA64, |
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.init = &lzma_simple_ia64_encoder_init, |
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.memusage = NULL, |
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.block_size = NULL, |
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.props_size_get = &lzma_simple_props_size, |
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.props_encode = &lzma_simple_props_encode, |
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}, |
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#endif |
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#ifdef HAVE_ENCODER_ARM |
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{ |
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.id = LZMA_FILTER_ARM, |
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.init = &lzma_simple_arm_encoder_init, |
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.memusage = NULL, |
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.block_size = NULL, |
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.props_size_get = &lzma_simple_props_size, |
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.props_encode = &lzma_simple_props_encode, |
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}, |
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#endif |
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#ifdef HAVE_ENCODER_ARMTHUMB |
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{ |
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.id = LZMA_FILTER_ARMTHUMB, |
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.init = &lzma_simple_armthumb_encoder_init, |
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.memusage = NULL, |
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.block_size = NULL, |
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.props_size_get = &lzma_simple_props_size, |
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.props_encode = &lzma_simple_props_encode, |
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}, |
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#endif |
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#ifdef HAVE_ENCODER_SPARC |
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{ |
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.id = LZMA_FILTER_SPARC, |
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.init = &lzma_simple_sparc_encoder_init, |
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.memusage = NULL, |
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.block_size = NULL, |
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.props_size_get = &lzma_simple_props_size, |
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.props_encode = &lzma_simple_props_encode, |
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}, |
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#endif |
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#ifdef HAVE_ENCODER_DELTA |
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{ |
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.id = LZMA_FILTER_DELTA, |
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.init = &lzma_delta_encoder_init, |
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.memusage = &lzma_delta_coder_memusage, |
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.block_size = NULL, |
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.props_size_get = NULL, |
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.props_size_fixed = 1, |
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.props_encode = &lzma_delta_props_encode, |
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}, |
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#endif |
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}; |
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static const lzma_filter_encoder * |
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encoder_find(lzma_vli id) |
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{ |
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for (size_t i = 0; i < ARRAY_SIZE(encoders); ++i) |
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if (encoders[i].id == id) |
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return encoders + i; |
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return NULL; |
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} |
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extern LZMA_API(lzma_bool) |
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lzma_filter_encoder_is_supported(lzma_vli id) |
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{ |
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return encoder_find(id) != NULL; |
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} |
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extern uint64_t |
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lzma_mt_block_size(const lzma_filter *filters) |
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{ |
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uint64_t max = 0; |
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for (size_t i = 0; filters[i].id != LZMA_VLI_UNKNOWN; ++i) { |
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const lzma_filter_encoder *const fe |
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= encoder_find(filters[i].id); |
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if (fe->block_size != NULL) { |
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const uint64_t size |
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= fe->block_size(filters[i].options); |
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if (size == 0) |
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return 0; |
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if (size > max) |
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max = size; |
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} |
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} |
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return max; |
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} |
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extern LZMA_API(lzma_ret) |
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lzma_properties_size(uint32_t *size, const lzma_filter *filter) |
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{ |
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const lzma_filter_encoder *const fe = encoder_find(filter->id); |
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if (fe == NULL) { |
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// Unknown filter - if the Filter ID is a proper VLI, |
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// return LZMA_OPTIONS_ERROR instead of LZMA_PROG_ERROR, |
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// because it's possible that we just don't have support |
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// compiled in for the requested filter. |
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return filter->id <= LZMA_VLI_MAX |
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? LZMA_OPTIONS_ERROR : LZMA_PROG_ERROR; |
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} |
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if (fe->props_size_get == NULL) { |
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// No props_size_get() function, use props_size_fixed. |
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*size = fe->props_size_fixed; |
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return LZMA_OK; |
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} |
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return fe->props_size_get(size, filter->options); |
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} |
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extern LZMA_API(lzma_ret) |
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lzma_properties_encode(const lzma_filter *filter, uint8_t *props) |
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{ |
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const lzma_filter_encoder *const fe = encoder_find(filter->id); |
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if (fe == NULL) |
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return LZMA_PROG_ERROR; |
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if (fe->props_encode == NULL) |
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return LZMA_OK; |
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return fe->props_encode(filter->options, props); |
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}
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