| /* libFLAC - Free Lossless Audio Codec library |
| * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 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. |
| */ |
| |
| #if HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #ifndef STARBOARD |
| #include <stdio.h> |
| #include <string.h> /* for strlen() */ |
| #endif // STARBOARD |
| |
| #include "starboard/client_porting/poem/string_poem.h" |
| |
| #include "private/stream_encoder_framing.h" |
| #include "private/crc.h" |
| #include "FLAC/assert.h" |
| |
| #ifdef max |
| #undef max |
| #endif |
| #define max(x,y) ((x)>(y)?(x):(y)) |
| |
| static FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method); |
| static FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned rice_parameters[], const unsigned raw_bits[], const unsigned partition_order, const FLAC__bool is_extended); |
| |
| FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitWriter *bw) |
| { |
| unsigned i, j; |
| const unsigned vendor_string_length = (unsigned)strlen(FLAC__VENDOR_STRING); |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN)) |
| return false; |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN)) |
| return false; |
| |
| /* |
| * First, for VORBIS_COMMENTs, adjust the length to reflect our vendor string |
| */ |
| i = metadata->length; |
| if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) { |
| FLAC__ASSERT(metadata->data.vorbis_comment.vendor_string.length == 0 || 0 != metadata->data.vorbis_comment.vendor_string.entry); |
| i -= metadata->data.vorbis_comment.vendor_string.length; |
| i += vendor_string_length; |
| } |
| FLAC__ASSERT(i < (1u << FLAC__STREAM_METADATA_LENGTH_LEN)); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, i, FLAC__STREAM_METADATA_LENGTH_LEN)) |
| return false; |
| |
| switch(metadata->type) { |
| case FLAC__METADATA_TYPE_STREAMINFO: |
| FLAC__ASSERT(metadata->data.stream_info.min_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN)); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN)) |
| return false; |
| FLAC__ASSERT(metadata->data.stream_info.max_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN)); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN)) |
| return false; |
| FLAC__ASSERT(metadata->data.stream_info.min_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN)); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_framesize, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN)) |
| return false; |
| FLAC__ASSERT(metadata->data.stream_info.max_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN)); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_framesize, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN)) |
| return false; |
| FLAC__ASSERT(FLAC__format_sample_rate_is_valid(metadata->data.stream_info.sample_rate)); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN)) |
| return false; |
| FLAC__ASSERT(metadata->data.stream_info.channels > 0); |
| FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN)); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN)) |
| return false; |
| FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0); |
| FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN)); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.stream_info.md5sum, 16)) |
| return false; |
| break; |
| case FLAC__METADATA_TYPE_PADDING: |
| if(!FLAC__bitwriter_write_zeroes(bw, metadata->length * 8)) |
| return false; |
| break; |
| case FLAC__METADATA_TYPE_APPLICATION: |
| if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)) |
| return false; |
| if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))) |
| return false; |
| break; |
| case FLAC__METADATA_TYPE_SEEKTABLE: |
| for(i = 0; i < metadata->data.seek_table.num_points; i++) { |
| if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN)) |
| return false; |
| } |
| break; |
| case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, vendor_string_length)) |
| return false; |
| if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.num_comments)) |
| return false; |
| for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) { |
| if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.comments[i].length)) |
| return false; |
| if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length)) |
| return false; |
| } |
| break; |
| case FLAC__METADATA_TYPE_CUESHEET: |
| FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0); |
| if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.cue_sheet.media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.num_tracks, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN)) |
| return false; |
| for(i = 0; i < metadata->data.cue_sheet.num_tracks; i++) { |
| const FLAC__StreamMetadata_CueSheet_Track *track = metadata->data.cue_sheet.tracks + i; |
| |
| if(!FLAC__bitwriter_write_raw_uint64(bw, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, track->number, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN)) |
| return false; |
| FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0); |
| if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, track->num_indices, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN)) |
| return false; |
| for(j = 0; j < track->num_indices; j++) { |
| const FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j; |
| |
| if(!FLAC__bitwriter_write_raw_uint64(bw, index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, index->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN)) |
| return false; |
| } |
| } |
| break; |
| case FLAC__METADATA_TYPE_PICTURE: |
| { |
| size_t len; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN)) |
| return false; |
| len = strlen(metadata->data.picture.mime_type); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.picture.mime_type, len)) |
| return false; |
| len = strlen((const char *)metadata->data.picture.description); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.description, len)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.data_length, FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.data, metadata->data.picture.data_length)) |
| return false; |
| } |
| break; |
| default: |
| if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.unknown.data, metadata->length)) |
| return false; |
| break; |
| } |
| |
| FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw)); |
| return true; |
| } |
| |
| FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__BitWriter *bw) |
| { |
| unsigned u, blocksize_hint, sample_rate_hint; |
| FLAC__byte crc; |
| |
| FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw)); |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN)) |
| return false; |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_RESERVED_LEN)) |
| return false; |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, (header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER)? 0 : 1, FLAC__FRAME_HEADER_BLOCKING_STRATEGY_LEN)) |
| return false; |
| |
| FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE); |
| /* when this assertion holds true, any legal blocksize can be expressed in the frame header */ |
| FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535u); |
| blocksize_hint = 0; |
| switch(header->blocksize) { |
| case 192: u = 1; break; |
| case 576: u = 2; break; |
| case 1152: u = 3; break; |
| case 2304: u = 4; break; |
| case 4608: u = 5; break; |
| case 256: u = 8; break; |
| case 512: u = 9; break; |
| case 1024: u = 10; break; |
| case 2048: u = 11; break; |
| case 4096: u = 12; break; |
| case 8192: u = 13; break; |
| case 16384: u = 14; break; |
| case 32768: u = 15; break; |
| default: |
| if(header->blocksize <= 0x100) |
| blocksize_hint = u = 6; |
| else |
| blocksize_hint = u = 7; |
| break; |
| } |
| if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN)) |
| return false; |
| |
| FLAC__ASSERT(FLAC__format_sample_rate_is_valid(header->sample_rate)); |
| sample_rate_hint = 0; |
| switch(header->sample_rate) { |
| case 88200: u = 1; break; |
| case 176400: u = 2; break; |
| case 192000: u = 3; break; |
| case 8000: u = 4; break; |
| case 16000: u = 5; break; |
| case 22050: u = 6; break; |
| case 24000: u = 7; break; |
| case 32000: u = 8; break; |
| case 44100: u = 9; break; |
| case 48000: u = 10; break; |
| case 96000: u = 11; break; |
| default: |
| if(header->sample_rate <= 255000 && header->sample_rate % 1000 == 0) |
| sample_rate_hint = u = 12; |
| else if(header->sample_rate % 10 == 0) |
| sample_rate_hint = u = 14; |
| else if(header->sample_rate <= 0xffff) |
| sample_rate_hint = u = 13; |
| else |
| u = 0; |
| break; |
| } |
| if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN)) |
| return false; |
| |
| FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS); |
| switch(header->channel_assignment) { |
| case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT: |
| u = header->channels - 1; |
| break; |
| case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE: |
| FLAC__ASSERT(header->channels == 2); |
| u = 8; |
| break; |
| case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
| FLAC__ASSERT(header->channels == 2); |
| u = 9; |
| break; |
| case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE: |
| FLAC__ASSERT(header->channels == 2); |
| u = 10; |
| break; |
| default: |
| FLAC__ASSERT(0); |
| } |
| if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN)) |
| return false; |
| |
| FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN)); |
| switch(header->bits_per_sample) { |
| case 8 : u = 1; break; |
| case 12: u = 2; break; |
| case 16: u = 4; break; |
| case 20: u = 5; break; |
| case 24: u = 6; break; |
| default: u = 0; break; |
| } |
| if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN)) |
| return false; |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN)) |
| return false; |
| |
| if(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) { |
| if(!FLAC__bitwriter_write_utf8_uint32(bw, header->number.frame_number)) |
| return false; |
| } |
| else { |
| if(!FLAC__bitwriter_write_utf8_uint64(bw, header->number.sample_number)) |
| return false; |
| } |
| |
| if(blocksize_hint) |
| if(!FLAC__bitwriter_write_raw_uint32(bw, header->blocksize-1, (blocksize_hint==6)? 8:16)) |
| return false; |
| |
| switch(sample_rate_hint) { |
| case 12: |
| if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 1000, 8)) |
| return false; |
| break; |
| case 13: |
| if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate, 16)) |
| return false; |
| break; |
| case 14: |
| if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 10, 16)) |
| return false; |
| break; |
| } |
| |
| /* write the CRC */ |
| if(!FLAC__bitwriter_get_write_crc8(bw, &crc)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, crc, FLAC__FRAME_HEADER_CRC_LEN)) |
| return false; |
| |
| return true; |
| } |
| |
| FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw) |
| { |
| FLAC__bool ok; |
| |
| ok = |
| FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN) && |
| (wasted_bits? FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1) : true) && |
| FLAC__bitwriter_write_raw_int32(bw, subframe->value, subframe_bps) |
| ; |
| |
| return ok; |
| } |
| |
| FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw) |
| { |
| unsigned i; |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK | (subframe->order<<1) | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN)) |
| return false; |
| if(wasted_bits) |
| if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1)) |
| return false; |
| |
| for(i = 0; i < subframe->order; i++) |
| if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps)) |
| return false; |
| |
| if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method)) |
| return false; |
| switch(subframe->entropy_coding_method.type) { |
| case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: |
| case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2: |
| if(!add_residual_partitioned_rice_( |
| bw, |
| subframe->residual, |
| residual_samples, |
| subframe->order, |
| subframe->entropy_coding_method.data.partitioned_rice.contents->parameters, |
| subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits, |
| subframe->entropy_coding_method.data.partitioned_rice.order, |
| /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2 |
| )) |
| return false; |
| break; |
| default: |
| FLAC__ASSERT(0); |
| } |
| |
| return true; |
| } |
| |
| FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw) |
| { |
| unsigned i; |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK | ((subframe->order-1)<<1) | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN)) |
| return false; |
| if(wasted_bits) |
| if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1)) |
| return false; |
| |
| for(i = 0; i < subframe->order; i++) |
| if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps)) |
| return false; |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_int32(bw, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN)) |
| return false; |
| for(i = 0; i < subframe->order; i++) |
| if(!FLAC__bitwriter_write_raw_int32(bw, subframe->qlp_coeff[i], subframe->qlp_coeff_precision)) |
| return false; |
| |
| if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method)) |
| return false; |
| switch(subframe->entropy_coding_method.type) { |
| case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: |
| case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2: |
| if(!add_residual_partitioned_rice_( |
| bw, |
| subframe->residual, |
| residual_samples, |
| subframe->order, |
| subframe->entropy_coding_method.data.partitioned_rice.contents->parameters, |
| subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits, |
| subframe->entropy_coding_method.data.partitioned_rice.order, |
| /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2 |
| )) |
| return false; |
| break; |
| default: |
| FLAC__ASSERT(0); |
| } |
| |
| return true; |
| } |
| |
| FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw) |
| { |
| unsigned i; |
| const FLAC__int32 *signal = subframe->data; |
| |
| if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN)) |
| return false; |
| if(wasted_bits) |
| if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1)) |
| return false; |
| |
| for(i = 0; i < samples; i++) |
| if(!FLAC__bitwriter_write_raw_int32(bw, signal[i], subframe_bps)) |
| return false; |
| |
| return true; |
| } |
| |
| FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method) |
| { |
| if(!FLAC__bitwriter_write_raw_uint32(bw, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN)) |
| return false; |
| switch(method->type) { |
| case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: |
| case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2: |
| if(!FLAC__bitwriter_write_raw_uint32(bw, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN)) |
| return false; |
| break; |
| default: |
| FLAC__ASSERT(0); |
| } |
| return true; |
| } |
| |
| FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned rice_parameters[], const unsigned raw_bits[], const unsigned partition_order, const FLAC__bool is_extended) |
| { |
| const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN; |
| const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER; |
| |
| if(partition_order == 0) { |
| unsigned i; |
| |
| if(raw_bits[0] == 0) { |
| if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[0], plen)) |
| return false; |
| if(!FLAC__bitwriter_write_rice_signed_block(bw, residual, residual_samples, rice_parameters[0])) |
| return false; |
| } |
| else { |
| FLAC__ASSERT(rice_parameters[0] == 0); |
| if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN)) |
| return false; |
| for(i = 0; i < residual_samples; i++) { |
| if(!FLAC__bitwriter_write_raw_int32(bw, residual[i], raw_bits[0])) |
| return false; |
| } |
| } |
| return true; |
| } |
| else { |
| unsigned i, j, k = 0, k_last = 0; |
| unsigned partition_samples; |
| const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order; |
| for(i = 0; i < (1u<<partition_order); i++) { |
| partition_samples = default_partition_samples; |
| if(i == 0) |
| partition_samples -= predictor_order; |
| k += partition_samples; |
| if(raw_bits[i] == 0) { |
| if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[i], plen)) |
| return false; |
| if(!FLAC__bitwriter_write_rice_signed_block(bw, residual+k_last, k-k_last, rice_parameters[i])) |
| return false; |
| } |
| else { |
| if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen)) |
| return false; |
| if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN)) |
| return false; |
| for(j = k_last; j < k; j++) { |
| if(!FLAC__bitwriter_write_raw_int32(bw, residual[j], raw_bits[i])) |
| return false; |
| } |
| } |
| k_last = k; |
| } |
| return true; |
| } |
| } |
