format.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:16k
源码类别:
Windows CE
开发平台:
C/C++
- /* libFLAC - Free Lossless Audio Codec library
- * Copyright (C) 2000,2001,2002,2003,2004,2005 Josh Coalson
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * - Neither the name of the Xiph.org Foundation nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include <stdio.h>
- #include <stdlib.h> /* for qsort() */
- #include "FLAC/assert.h"
- #include "FLAC/format.h"
- #include "private/format.h"
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
- #ifdef min
- #undef min
- #endif
- #define min(a,b) ((a)<(b)?(a):(b))
- /* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
- #ifdef _MSC_VER
- #define FLAC__U64L(x) x
- #else
- #define FLAC__U64L(x) x##LLU
- #endif
- /* VERSION should come from configure */
- FLAC_API const char *FLAC__VERSION_STRING = VERSION;
- #if defined _MSC_VER || defined __MINW32__
- /* yet one more hack because of MSVC6: */
- FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC 1.1.2 20050205";
- #else
- FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC " VERSION " 20050205";
- #endif
- FLAC_API const FLAC__byte FLAC__STREAM_SYNC_STRING[4] = { 'f','L','a','C' };
- FLAC_API const unsigned FLAC__STREAM_SYNC = 0x664C6143;
- FLAC_API const unsigned FLAC__STREAM_SYNC_LEN = 32; /* bits */;
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN = 16; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN = 16; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN = 24; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN = 24; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN = 20; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN = 3; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN = 5; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN = 36; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MD5SUM_LEN = 128; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_APPLICATION_ID_LEN = 32; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN = 64; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN = 64; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN = 16; /* bits */
- FLAC_API const FLAC__uint64 FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER = FLAC__U64L(0xffffffffffffffff);
- FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN = 32; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN = 32; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN = 64; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN = 8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN = 3*8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN = 64; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN = 8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN = 12*8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN = 1; /* bit */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN = 1; /* bit */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN = 6+13*8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN = 8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN = 128*8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN = 64; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN = 1; /* bit */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN = 7+258*8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN = 8; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_IS_LAST_LEN = 1; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_TYPE_LEN = 7; /* bits */
- FLAC_API const unsigned FLAC__STREAM_METADATA_LENGTH_LEN = 24; /* bits */
- FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC = 0x3ffe;
- FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC_LEN = 14; /* bits */
- FLAC_API const unsigned FLAC__FRAME_HEADER_RESERVED_LEN = 2; /* bits */
- FLAC_API const unsigned FLAC__FRAME_HEADER_BLOCK_SIZE_LEN = 4; /* bits */
- FLAC_API const unsigned FLAC__FRAME_HEADER_SAMPLE_RATE_LEN = 4; /* bits */
- FLAC_API const unsigned FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN = 4; /* bits */
- FLAC_API const unsigned FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN = 3; /* bits */
- FLAC_API const unsigned FLAC__FRAME_HEADER_ZERO_PAD_LEN = 1; /* bits */
- FLAC_API const unsigned FLAC__FRAME_HEADER_CRC_LEN = 8; /* bits */
- FLAC_API const unsigned FLAC__FRAME_FOOTER_CRC_LEN = 16; /* bits */
- FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_TYPE_LEN = 2; /* bits */
- FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN = 4; /* bits */
- FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN = 4; /* bits */
- FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN = 5; /* bits */
- FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER = 15; /* == (1<<FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN)-1 */
- FLAC_API const char * const FLAC__EntropyCodingMethodTypeString[] = {
- "PARTITIONED_RICE"
- };
- FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN = 4; /* bits */
- FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN = 5; /* bits */
- FLAC_API const unsigned FLAC__SUBFRAME_ZERO_PAD_LEN = 1; /* bits */
- FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LEN = 6; /* bits */
- FLAC_API const unsigned FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN = 1; /* bits */
- FLAC_API const unsigned FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK = 0x00;
- FLAC_API const unsigned FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK = 0x02;
- FLAC_API const unsigned FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK = 0x10;
- FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK = 0x40;
- FLAC_API const char * const FLAC__SubframeTypeString[] = {
- "CONSTANT",
- "VERBATIM",
- "FIXED",
- "LPC"
- };
- FLAC_API const char * const FLAC__ChannelAssignmentString[] = {
- "INDEPENDENT",
- "LEFT_SIDE",
- "RIGHT_SIDE",
- "MID_SIDE"
- };
- FLAC_API const char * const FLAC__FrameNumberTypeString[] = {
- "FRAME_NUMBER_TYPE_FRAME_NUMBER",
- "FRAME_NUMBER_TYPE_SAMPLE_NUMBER"
- };
- FLAC_API const char * const FLAC__MetadataTypeString[] = {
- "STREAMINFO",
- "PADDING",
- "APPLICATION",
- "SEEKTABLE",
- "VORBIS_COMMENT",
- "CUESHEET"
- };
- FLAC_API FLAC__bool FLAC__format_sample_rate_is_valid(unsigned sample_rate)
- {
- if(
- sample_rate == 0 ||
- sample_rate > FLAC__MAX_SAMPLE_RATE ||
- (
- sample_rate >= (1u << 16) &&
- !(sample_rate % 1000 == 0 || sample_rate % 10 == 0)
- )
- ) {
- return false;
- }
- else
- return true;
- }
- FLAC_API FLAC__bool FLAC__format_seektable_is_legal(const FLAC__StreamMetadata_SeekTable *seek_table)
- {
- unsigned i;
- FLAC__uint64 prev_sample_number = 0;
- FLAC__bool got_prev = false;
- FLAC__ASSERT(0 != seek_table);
- for(i = 0; i < seek_table->num_points; i++) {
- if(got_prev) {
- if(
- seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
- seek_table->points[i].sample_number <= prev_sample_number
- )
- return false;
- }
- prev_sample_number = seek_table->points[i].sample_number;
- got_prev = true;
- }
- return true;
- }
- /* used as the sort predicate for qsort() */
- static int seekpoint_compare_(const FLAC__StreamMetadata_SeekPoint *l, const FLAC__StreamMetadata_SeekPoint *r)
- {
- /* we don't just 'return l->sample_number - r->sample_number' since the result (FLAC__int64) might overflow an 'int' */
- if(l->sample_number == r->sample_number)
- return 0;
- else if(l->sample_number < r->sample_number)
- return -1;
- else
- return 1;
- }
- FLAC_API unsigned FLAC__format_seektable_sort(FLAC__StreamMetadata_SeekTable *seek_table)
- {
- unsigned i, j;
- FLAC__bool first;
- FLAC__ASSERT(0 != seek_table);
- /* sort the seekpoints */
- qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetadata_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare_);
- /* uniquify the seekpoints */
- first = true;
- for(i = j = 0; i < seek_table->num_points; i++) {
- if(seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER) {
- if(!first) {
- if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number)
- continue;
- }
- }
- first = false;
- seek_table->points[j++] = seek_table->points[i];
- }
- for(i = j; i < seek_table->num_points; i++) {
- seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
- seek_table->points[i].stream_offset = 0;
- seek_table->points[i].frame_samples = 0;
- }
- return j;
- }
- static __inline unsigned utf8len_(const FLAC__byte *utf8)
- {
- FLAC__ASSERT(0 != utf8);
- if ((utf8[0] & 0x80) == 0)
- return 1;
- else if ((utf8[0] & 0xE0) == 0xC0 && (utf8[1] & 0xC0) == 0x80)
- return 2;
- else if ((utf8[0] & 0xF0) == 0xE0 && (utf8[1] & 0xC0) == 0x80 && (utf8[2] & 0xC0) == 0x80)
- return 3;
- else
- return 0;
- }
- FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_name_is_legal(const char *name)
- {
- char c;
- for(c = *name; c; c = *(++name))
- if(c < 0x20 || c == 0x3d || c > 0x7d)
- return false;
- return true;
- }
- FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_value_is_legal(const FLAC__byte *value, unsigned length)
- {
- if(length == (unsigned)(-1)) {
- while(*value) {
- unsigned n = utf8len_(value);
- if(n == 0)
- return false;
- value += n;
- }
- }
- else {
- const FLAC__byte *end = value + length;
- while(value < end) {
- unsigned n = utf8len_(value);
- if(n == 0)
- return false;
- value += n;
- }
- if(value != end)
- return false;
- }
- return true;
- }
- FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_is_legal(const FLAC__byte *entry, unsigned length)
- {
- const FLAC__byte *s, *end;
- for(s = entry, end = s + length; s < end && *s != '='; s++) {
- if(*s < 0x20 || *s > 0x7D)
- return false;
- }
- if(s == end)
- return false;
- s++; /* skip '=' */
- while(s < end) {
- unsigned n = utf8len_(s);
- if(n == 0)
- return false;
- s += n;
- }
- if(s != end)
- return false;
- return true;
- }
- FLAC_API FLAC__bool FLAC__format_cuesheet_is_legal(const FLAC__StreamMetadata_CueSheet *cue_sheet, FLAC__bool check_cd_da_subset, const char **violation)
- {
- unsigned i, j;
- if(check_cd_da_subset) {
- if(cue_sheet->lead_in < 2 * 44100) {
- if(violation) *violation = "CD-DA cue sheet must have a lead-in length of at least 2 seconds";
- return false;
- }
- if(cue_sheet->lead_in % 588 != 0) {
- if(violation) *violation = "CD-DA cue sheet lead-in length must be evenly divisible by 588 samples";
- return false;
- }
- }
- if(cue_sheet->num_tracks == 0) {
- if(violation) *violation = "cue sheet must have at least one track (the lead-out)";
- return false;
- }
- if(check_cd_da_subset && cue_sheet->tracks[cue_sheet->num_tracks-1].number != 170) {
- if(violation) *violation = "CD-DA cue sheet must have a lead-out track number 170 (0xAA)";
- return false;
- }
- for(i = 0; i < cue_sheet->num_tracks; i++) {
- if(cue_sheet->tracks[i].number == 0) {
- if(violation) *violation = "cue sheet may not have a track number 0";
- return false;
- }
- if(check_cd_da_subset) {
- if(!((cue_sheet->tracks[i].number >= 1 && cue_sheet->tracks[i].number <= 99) || cue_sheet->tracks[i].number == 170)) {
- if(violation) *violation = "CD-DA cue sheet track number must be 1-99 or 170";
- return false;
- }
- }
- if(check_cd_da_subset && cue_sheet->tracks[i].offset % 588 != 0) {
- if(violation) *violation = "CD-DA cue sheet track offset must be evenly divisible by 588 samples";
- return false;
- }
- if(i < cue_sheet->num_tracks - 1) {
- if(cue_sheet->tracks[i].num_indices == 0) {
- if(violation) *violation = "cue sheet track must have at least one index point";
- return false;
- }
- if(cue_sheet->tracks[i].indices[0].number > 1) {
- if(violation) *violation = "cue sheet track's first index number must be 0 or 1";
- return false;
- }
- }
- for(j = 0; j < cue_sheet->tracks[i].num_indices; j++) {
- if(check_cd_da_subset && cue_sheet->tracks[i].indices[j].offset % 588 != 0) {
- if(violation) *violation = "CD-DA cue sheet track index offset must be evenly divisible by 588 samples";
- return false;
- }
- if(j > 0) {
- if(cue_sheet->tracks[i].indices[j].number != cue_sheet->tracks[i].indices[j-1].number + 1) {
- if(violation) *violation = "cue sheet track index numbers must increase by 1";
- return false;
- }
- }
- }
- }
- return true;
- }
- /*
- * These routines are private to libFLAC
- */
- unsigned FLAC__format_get_max_rice_partition_order(unsigned blocksize, unsigned predictor_order)
- {
- return
- FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(
- FLAC__format_get_max_rice_partition_order_from_blocksize(blocksize),
- blocksize,
- predictor_order
- );
- }
- unsigned FLAC__format_get_max_rice_partition_order_from_blocksize(unsigned blocksize)
- {
- unsigned max_rice_partition_order = 0;
- while(!(blocksize & 1)) {
- max_rice_partition_order++;
- blocksize >>= 1;
- }
- return min(FLAC__MAX_RICE_PARTITION_ORDER, max_rice_partition_order);
- }
- unsigned FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(unsigned limit, unsigned blocksize, unsigned predictor_order)
- {
- unsigned max_rice_partition_order = limit;
- while(max_rice_partition_order > 0 && (blocksize >> max_rice_partition_order) <= predictor_order)
- max_rice_partition_order--;
- FLAC__ASSERT(
- (max_rice_partition_order == 0 && blocksize >= predictor_order) ||
- (max_rice_partition_order > 0 && blocksize >> max_rice_partition_order > predictor_order)
- );
- return max_rice_partition_order;
- }
- void FLAC__format_entropy_coding_method_partitioned_rice_contents_init(FLAC__EntropyCodingMethod_PartitionedRiceContents *object)
- {
- FLAC__ASSERT(0 != object);
- object->parameters = 0;
- object->raw_bits = 0;
- object->capacity_by_order = 0;
- }
- void FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(FLAC__EntropyCodingMethod_PartitionedRiceContents *object)
- {
- FLAC__ASSERT(0 != object);
- if(0 != object->parameters)
- free(object->parameters);
- if(0 != object->raw_bits)
- free(object->raw_bits);
- FLAC__format_entropy_coding_method_partitioned_rice_contents_init(object);
- }
- FLAC__bool FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(FLAC__EntropyCodingMethod_PartitionedRiceContents *object, unsigned max_partition_order)
- {
- FLAC__ASSERT(0 != object);
- FLAC__ASSERT(object->capacity_by_order > 0 || (0 == object->parameters && 0 == object->raw_bits));
- if(object->capacity_by_order < max_partition_order) {
- if(0 == (object->parameters = (unsigned*)realloc(object->parameters, sizeof(unsigned)*(1 << max_partition_order))))
- return false;
- if(0 == (object->raw_bits = (unsigned*)realloc(object->raw_bits, sizeof(unsigned)*(1 << max_partition_order))))
- return false;
- object->capacity_by_order = max_partition_order;
- }
- return true;
- }