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📄 alone_decoder.c(5.53 KB)
📄 alone_decoder.h(601 B)
📄 alone_encoder.c(3.66 KB)
📄 auto_decoder.c(4.79 KB)
📄 block_buffer_decoder.c(2.31 KB)
📄 block_buffer_encoder.c(9.89 KB)
📄 block_buffer_encoder.h(763 B)
📄 block_decoder.c(6.82 KB)
📄 block_decoder.h(576 B)
📄 block_encoder.c(5.63 KB)
📄 block_encoder.h(1.85 KB)
📄 block_header_decoder.c(3.62 KB)
📄 block_header_encoder.c(3.27 KB)
📄 block_util.c(2.58 KB)
📄 common.c(10.4 KB)
📄 common.h(10.22 KB)
📄 easy_buffer_encoder.c(840 B)
📄 easy_decoder_memusage.c(668 B)
📄 easy_encoder.c(678 B)
📄 easy_encoder_memusage.c(654 B)
📄 easy_preset.c(727 B)
📄 easy_preset.h(921 B)
📄 filter_buffer_decoder.c(2.45 KB)
📄 filter_buffer_encoder.c(1.5 KB)
📄 filter_common.c(8.5 KB)
📄 filter_common.h(1.23 KB)
📄 filter_decoder.c(4.32 KB)
📄 filter_decoder.h(617 B)
📄 filter_encoder.c(7.17 KB)
📄 filter_encoder.h(732 B)
📄 filter_flags_decoder.c(1.16 KB)
📄 filter_flags_encoder.c(1.37 KB)
📄 hardware_cputhreads.c(526 B)
📄 hardware_physmem.c(683 B)
📄 index.c(34.61 KB)
📄 index.h(1.93 KB)
📄 index_decoder.c(8.4 KB)
📄 index_encoder.c(5.72 KB)
📄 index_encoder.h(584 B)
📄 index_hash.c(8.77 KB)
📄 memcmplen.h(4.71 KB)
📄 outqueue.c(4.48 KB)
📄 outqueue.h(4.88 KB)
📄 stream_buffer_decoder.c(2.72 KB)
📄 stream_buffer_encoder.c(3.96 KB)
📄 stream_decoder.c(12.7 KB)
📄 stream_decoder.h(599 B)
📄 stream_encoder.c(9.63 KB)
📄 stream_encoder_mt.c(29.64 KB)
📄 stream_flags_common.c(1.29 KB)
📄 stream_flags_common.h(883 B)
📄 stream_flags_decoder.c(2.23 KB)
📄 stream_flags_encoder.c(2.01 KB)
📄 vli_decoder.c(2.5 KB)
📄 vli_encoder.c(1.89 KB)
📄 vli_size.c(630 B)

Editing: filter_encoder.c

///////////////////////////////////////////////////////////////////////////////
//
/// \file       filter_decoder.c
/// \brief      Filter ID mapping to filter-specific functions
//
//  Author:     Lasse Collin
//
//  This file has been put into the public domain.
//  You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////

#include "filter_encoder.h"
#include "filter_common.h"
#include "lzma_encoder.h"
#include "lzma2_encoder.h"
#include "simple_encoder.h"
#include "delta_encoder.h"

typedef struct {
	/// Filter ID
	lzma_vli id;

/// Initializes the filter encoder and calls lzma_next_filter_init()
	/// for filters + 1.
	lzma_init_function init;

/// Calculates memory usage of the encoder. If the options are
	/// invalid, UINT64_MAX is returned.
	uint64_t (*memusage)(const void *options);

/// Calculates the recommended Uncompressed Size for .xz Blocks to
	/// which the input data can be split to make multithreaded
	/// encoding possible. If this is NULL, it is assumed that
	/// the encoder is fast enough with single thread.
	uint64_t (*block_size)(const void *options);

/// Tells the size of the Filter Properties field. If options are
	/// invalid, UINT32_MAX is returned. If this is NULL, props_size_fixed
	/// is used.
	lzma_ret (*props_size_get)(uint32_t *size, const void *options);
	uint32_t props_size_fixed;

/// Encodes Filter Properties.
	///
	/// \return     - LZMA_OK: Properties encoded successfully.
	///             - LZMA_OPTIONS_ERROR: Unsupported options
	///             - LZMA_PROG_ERROR: Invalid options or not enough
	///               output space
	lzma_ret (*props_encode)(const void *options, uint8_t *out);

} lzma_filter_encoder;

static const lzma_filter_encoder encoders[] = {
#ifdef HAVE_ENCODER_LZMA1
	{
		.id = LZMA_FILTER_LZMA1,
		.init = &lzma_lzma_encoder_init,
		.memusage = &lzma_lzma_encoder_memusage,
		.block_size = NULL, // FIXME
		.props_size_get = NULL,
		.props_size_fixed = 5,
		.props_encode = &lzma_lzma_props_encode,
	},
#endif
#ifdef HAVE_ENCODER_LZMA2
	{
		.id = LZMA_FILTER_LZMA2,
		.init = &lzma_lzma2_encoder_init,
		.memusage = &lzma_lzma2_encoder_memusage,
		.block_size = &lzma_lzma2_block_size, // FIXME
		.props_size_get = NULL,
		.props_size_fixed = 1,
		.props_encode = &lzma_lzma2_props_encode,
	},
#endif
#ifdef HAVE_ENCODER_X86
	{
		.id = LZMA_FILTER_X86,
		.init = &lzma_simple_x86_encoder_init,
		.memusage = NULL,
		.block_size = NULL,
		.props_size_get = &lzma_simple_props_size,
		.props_encode = &lzma_simple_props_encode,
	},
#endif
#ifdef HAVE_ENCODER_POWERPC
	{
		.id = LZMA_FILTER_POWERPC,
		.init = &lzma_simple_powerpc_encoder_init,
		.memusage = NULL,
		.block_size = NULL,
		.props_size_get = &lzma_simple_props_size,
		.props_encode = &lzma_simple_props_encode,
	},
#endif
#ifdef HAVE_ENCODER_IA64
	{
		.id = LZMA_FILTER_IA64,
		.init = &lzma_simple_ia64_encoder_init,
		.memusage = NULL,
		.block_size = NULL,
		.props_size_get = &lzma_simple_props_size,
		.props_encode = &lzma_simple_props_encode,
	},
#endif
#ifdef HAVE_ENCODER_ARM
	{
		.id = LZMA_FILTER_ARM,
		.init = &lzma_simple_arm_encoder_init,
		.memusage = NULL,
		.block_size = NULL,
		.props_size_get = &lzma_simple_props_size,
		.props_encode = &lzma_simple_props_encode,
	},
#endif
#ifdef HAVE_ENCODER_ARMTHUMB
	{
		.id = LZMA_FILTER_ARMTHUMB,
		.init = &lzma_simple_armthumb_encoder_init,
		.memusage = NULL,
		.block_size = NULL,
		.props_size_get = &lzma_simple_props_size,
		.props_encode = &lzma_simple_props_encode,
	},
#endif
#ifdef HAVE_ENCODER_SPARC
	{
		.id = LZMA_FILTER_SPARC,
		.init = &lzma_simple_sparc_encoder_init,
		.memusage = NULL,
		.block_size = NULL,
		.props_size_get = &lzma_simple_props_size,
		.props_encode = &lzma_simple_props_encode,
	},
#endif
#ifdef HAVE_ENCODER_DELTA
	{
		.id = LZMA_FILTER_DELTA,
		.init = &lzma_delta_encoder_init,
		.memusage = &lzma_delta_coder_memusage,
		.block_size = NULL,
		.props_size_get = NULL,
		.props_size_fixed = 1,
		.props_encode = &lzma_delta_props_encode,
	},
#endif
};

static const lzma_filter_encoder *
encoder_find(lzma_vli id)
{
	for (size_t i = 0; i < ARRAY_SIZE(encoders); ++i)
		if (encoders[i].id == id)
			return encoders + i;

return NULL;
}

extern LZMA_API(lzma_bool)
lzma_filter_encoder_is_supported(lzma_vli id)
{
	return encoder_find(id) != NULL;
}

extern LZMA_API(lzma_ret)
lzma_filters_update(lzma_stream *strm, const lzma_filter *filters)
{
	if (strm->internal->next.update == NULL)
		return LZMA_PROG_ERROR;

// Validate the filter chain.
	if (lzma_raw_encoder_memusage(filters) == UINT64_MAX)
		return LZMA_OPTIONS_ERROR;

// The actual filter chain in the encoder is reversed. Some things
	// still want the normal order chain, so we provide both.
	size_t count = 1;
	while (filters[count].id != LZMA_VLI_UNKNOWN)
		++count;

lzma_filter reversed_filters[LZMA_FILTERS_MAX + 1];
	for (size_t i = 0; i < count; ++i)
		reversed_filters[count - i - 1] = filters[i];

reversed_filters[count].id = LZMA_VLI_UNKNOWN;

return strm->internal->next.update(strm->internal->next.coder,
			strm->allocator, filters, reversed_filters);
}

extern lzma_ret
lzma_raw_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
		const lzma_filter *options)
{
	return lzma_raw_coder_init(next, allocator,
			options, (lzma_filter_find)(&encoder_find), true);
}

extern LZMA_API(lzma_ret)
lzma_raw_encoder(lzma_stream *strm, const lzma_filter *options)
{
	lzma_next_strm_init(lzma_raw_coder_init, strm, options,
			(lzma_filter_find)(&encoder_find), true);

strm->internal->supported_actions[LZMA_RUN] = true;
	strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
	strm->internal->supported_actions[LZMA_FINISH] = true;

return LZMA_OK;
}

extern LZMA_API(uint64_t)
lzma_raw_encoder_memusage(const lzma_filter *filters)
{
	return lzma_raw_coder_memusage(
			(lzma_filter_find)(&encoder_find), filters);
}

extern uint64_t
lzma_mt_block_size(const lzma_filter *filters)
{
	uint64_t max = 0;

for (size_t i = 0; filters[i].id != LZMA_VLI_UNKNOWN; ++i) {
		const lzma_filter_encoder *const fe
				= encoder_find(filters[i].id);
		if (fe->block_size != NULL) {
			const uint64_t size
					= fe->block_size(filters[i].options);
			if (size == 0)
				return 0;

if (size > max)
				max = size;
		}
	}

return max;
}

extern LZMA_API(lzma_ret)
lzma_properties_size(uint32_t *size, const lzma_filter *filter)
{
	const lzma_filter_encoder *const fe = encoder_find(filter->id);
	if (fe == NULL) {
		// Unknown filter - if the Filter ID is a proper VLI,
		// return LZMA_OPTIONS_ERROR instead of LZMA_PROG_ERROR,
		// because it's possible that we just don't have support
		// compiled in for the requested filter.
		return filter->id <= LZMA_VLI_MAX
				? LZMA_OPTIONS_ERROR : LZMA_PROG_ERROR;
	}

if (fe->props_size_get == NULL) {
		// No props_size_get() function, use props_size_fixed.
		*size = fe->props_size_fixed;
		return LZMA_OK;
	}

return fe->props_size_get(size, filter->options);
}

extern LZMA_API(lzma_ret)
lzma_properties_encode(const lzma_filter *filter, uint8_t *props)
{
	const lzma_filter_encoder *const fe = encoder_find(filter->id);
	if (fe == NULL)
		return LZMA_PROG_ERROR;

if (fe->props_encode == NULL)
		return LZMA_OK;

return fe->props_encode(filter->options, props);
}

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Editing: filter_encoder.c

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