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Commit aec256bf authored by Josh Coalson's avatar Josh Coalson
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new blurb-based bitbuffer design changes

parent 28b18573
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src/libFLAC/bitbuffer.c
View file @ aec256bf
This diff is collapsed.
src/libFLAC/include/private/bitbuffer.h
View file @ aec256bf
......@@ -23,23 +23,61 @@
#include <stdio.h> /* for FILE */
#include "FLAC/ordinals.h"
typedef struct {
FLAC__byte *buffer;
unsigned capacity; /* in bytes */
unsigned bytes, bits;
unsigned total_bits; /* must always == 8*bytes+bits */
unsigned consumed_bytes, consumed_bits;
unsigned total_consumed_bits; /* must always == 8*consumed_bytes+consumed_bits */
FLAC__uint16 read_crc16;
} FLAC__BitBuffer;
/* @@@ This should be configurable. Valid values are currently 8 and 32. */
/* @@@ WATCHOUT! do not use 32 with a little endian system yet. */
#define FLAC__BITS_PER_BLURB 8
void FLAC__bitbuffer_init(FLAC__BitBuffer *bb);
#if FLAC__BITS_PER_BLURB == 8
typedef FLAC__byte FLAC__blurb;
#elif FLAC__BITS_PER_BLURB == 32
typedef FLAC__uint32 FLAC__blurb;
#else
/* ERROR, only sizes of 8 and 32 are supported */
#endif
/*
* opaque structure definition
*/
struct FLAC__BitBuffer;
typedef struct FLAC__BitBuffer FLAC__BitBuffer;
/*
* construction, deletion, initialization, cloning functions
*/
FLAC__BitBuffer *FLAC__bitbuffer_new();
void FLAC__bitbuffer_delete(FLAC__BitBuffer *bb);
FLAC__bool FLAC__bitbuffer_init(FLAC__BitBuffer *bb);
FLAC__bool FLAC__bitbuffer_init_from(FLAC__BitBuffer *bb, const FLAC__byte buffer[], unsigned bytes);
void FLAC__bitbuffer_init_read_crc16(FLAC__BitBuffer *bb, FLAC__uint16 seed);
FLAC__bool FLAC__bitbuffer_concatenate_aligned(FLAC__BitBuffer *dest, const FLAC__BitBuffer *src);
void FLAC__bitbuffer_free(FLAC__BitBuffer *bb); /* does not 'free(buffer)' */
FLAC__bool FLAC__bitbuffer_clear(FLAC__BitBuffer *bb);
FLAC__bool FLAC__bitbuffer_clone(FLAC__BitBuffer *dest, const FLAC__BitBuffer *src);
/*
* CRC functions
*/
void FLAC__bitbuffer_reset_read_crc16(FLAC__BitBuffer *bb, FLAC__uint16 seed);
FLAC__uint16 FLAC__bitbuffer_get_read_crc16(FLAC__BitBuffer *bb);
FLAC__uint16 FLAC__bitbuffer_get_write_crc16(const FLAC__BitBuffer *bb);
FLAC__byte FLAC__bitbuffer_get_write_crc8(const FLAC__BitBuffer *bb);
/*
* info functions
*/
FLAC__bool FLAC__bitbuffer_is_byte_aligned(const FLAC__BitBuffer *bb);
FLAC__bool FLAC__bitbuffer_is_consumed_byte_aligned(const FLAC__BitBuffer *bb);
unsigned FLAC__bitbuffer_bits_left_for_byte_alignment(const FLAC__BitBuffer *bb);
unsigned FLAC__bitbuffer_get_input_bytes_unconsumed(const FLAC__BitBuffer *bb); /* do not call unless byte-aligned */
/*
* direct buffer access
*/
void FLAC__bitbuffer_get_buffer(FLAC__BitBuffer *bb, const FLAC__byte **buffer, unsigned *bytes);
void FLAC__bitbuffer_release_buffer(FLAC__BitBuffer *bb);
/*
* write functions
*/
FLAC__bool FLAC__bitbuffer_write_zeroes(FLAC__BitBuffer *bb, unsigned bits);
FLAC__bool FLAC__bitbuffer_write_raw_uint32(FLAC__BitBuffer *bb, FLAC__uint32 val, unsigned bits);
FLAC__bool FLAC__bitbuffer_write_raw_int32(FLAC__BitBuffer *bb, FLAC__int32 val, unsigned bits);
......@@ -47,20 +85,34 @@ FLAC__bool FLAC__bitbuffer_write_raw_uint64(FLAC__BitBuffer *bb, FLAC__uint64 va
FLAC__bool FLAC__bitbuffer_write_raw_int64(FLAC__BitBuffer *bb, FLAC__int64 val, unsigned bits);
FLAC__bool FLAC__bitbuffer_write_unary_unsigned(FLAC__BitBuffer *bb, unsigned val);
unsigned FLAC__bitbuffer_rice_bits(int val, unsigned parameter);
#if 0 /* UNUSED */
unsigned FLAC__bitbuffer_golomb_bits_signed(int val, unsigned parameter);
unsigned FLAC__bitbuffer_golomb_bits_unsigned(unsigned val, unsigned parameter);
#endif
#ifdef FLAC__SYMMETRIC_RICE
FLAC__bool FLAC__bitbuffer_write_symmetric_rice_signed(FLAC__BitBuffer *bb, int val, unsigned parameter);
#if 0 /* UNUSED */
FLAC__bool FLAC__bitbuffer_write_symmetric_rice_signed_guarded(FLAC__BitBuffer *bb, int val, unsigned parameter, unsigned max_bits, FLAC__bool *overflow);
#endif
FLAC__bool FLAC__bitbuffer_write_symmetric_rice_signed_escape(FLAC__BitBuffer *bb, int val, unsigned parameter);
#endif
FLAC__bool FLAC__bitbuffer_write_rice_signed(FLAC__BitBuffer *bb, int val, unsigned parameter);
#if 0 /* UNUSED */
FLAC__bool FLAC__bitbuffer_write_rice_signed_guarded(FLAC__BitBuffer *bb, int val, unsigned parameter, unsigned max_bits, FLAC__bool *overflow);
#endif
#if 0 /* UNUSED */
FLAC__bool FLAC__bitbuffer_write_golomb_signed(FLAC__BitBuffer *bb, int val, unsigned parameter);
FLAC__bool FLAC__bitbuffer_write_golomb_signed_guarded(FLAC__BitBuffer *bb, int val, unsigned parameter, unsigned max_bits, FLAC__bool *overflow);
FLAC__bool FLAC__bitbuffer_write_golomb_unsigned(FLAC__BitBuffer *bb, unsigned val, unsigned parameter);
FLAC__bool FLAC__bitbuffer_write_golomb_unsigned_guarded(FLAC__BitBuffer *bb, unsigned val, unsigned parameter, unsigned max_bits, FLAC__bool *overflow);
#endif
FLAC__bool FLAC__bitbuffer_write_utf8_uint32(FLAC__BitBuffer *bb, FLAC__uint32 val);
FLAC__bool FLAC__bitbuffer_write_utf8_uint64(FLAC__BitBuffer *bb, FLAC__uint64 val);
FLAC__bool FLAC__bitbuffer_zero_pad_to_byte_boundary(FLAC__BitBuffer *bb);
/*
* read functions
*/
FLAC__bool FLAC__bitbuffer_peek_bit(FLAC__BitBuffer *bb, unsigned *val, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
FLAC__bool FLAC__bitbuffer_read_bit(FLAC__BitBuffer *bb, unsigned *val, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
FLAC__bool FLAC__bitbuffer_read_bit_to_uint32(FLAC__BitBuffer *bb, FLAC__uint32 *val, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
......@@ -70,10 +122,14 @@ FLAC__bool FLAC__bitbuffer_read_raw_int32(FLAC__BitBuffer *bb, FLAC__int32 *val,
FLAC__bool FLAC__bitbuffer_read_raw_uint64(FLAC__BitBuffer *bb, FLAC__uint64 *val, const unsigned bits, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
FLAC__bool FLAC__bitbuffer_read_raw_int64(FLAC__BitBuffer *bb, FLAC__int64 *val, const unsigned bits, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
FLAC__bool FLAC__bitbuffer_read_unary_unsigned(FLAC__BitBuffer *bb, unsigned *val, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
#ifdef FLAC__SYMMETRIC_RICE
FLAC__bool FLAC__bitbuffer_read_symmetric_rice_signed(FLAC__BitBuffer *bb, int *val, unsigned parameter, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
#endif
FLAC__bool FLAC__bitbuffer_read_rice_signed(FLAC__BitBuffer *bb, int *val, unsigned parameter, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
#if 0 /* UNUSED */
FLAC__bool FLAC__bitbuffer_read_golomb_signed(FLAC__BitBuffer *bb, int *val, unsigned parameter, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
FLAC__bool FLAC__bitbuffer_read_golomb_unsigned(FLAC__BitBuffer *bb, unsigned *val, unsigned parameter, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data);
#endif
FLAC__bool FLAC__bitbuffer_read_utf8_uint32(FLAC__BitBuffer *bb, FLAC__uint32 *val, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data, FLAC__byte *raw, unsigned *rawlen);
FLAC__bool FLAC__bitbuffer_read_utf8_uint64(FLAC__BitBuffer *bb, FLAC__uint64 *val, FLAC__bool (*read_callback)(FLAC__byte buffer[], unsigned *bytes, void *client_data), void *client_data, FLAC__byte *raw, unsigned *rawlen);
void FLAC__bitbuffer_dump(const FLAC__BitBuffer *bb, FILE *out);
......
src/libFLAC/stream_decoder.c
View file @ aec256bf
This diff is collapsed.
src/libFLAC/stream_encoder.c
View file @ aec256bf
......@@ -97,7 +97,7 @@ typedef struct FLAC__StreamEncoderPrivate {
FLAC__uint32 *abs_residual; /* workspace where abs(candidate residual) is stored */
FLAC__uint64 *abs_residual_partition_sums; /* workspace where the sum of abs(candidate residual) for each partition is stored */
unsigned *raw_bits_per_partition; /* workspace where the sum of silog2(candidate residual) for each partition is stored */
FLAC__BitBuffer frame; /* the current frame being worked on */
FLAC__BitBuffer *frame; /* the current frame being worked on */
double loose_mid_side_stereo_frames_exact; /* exact number of frames the encoder will use before trying both independent and mid/side frames again */
unsigned loose_mid_side_stereo_frames; /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */
unsigned loose_mid_side_stereo_frame_count; /* number of frames using the current channel assignment */
......@@ -195,6 +195,13 @@ FLAC__StreamEncoder *FLAC__stream_encoder_new()
free(encoder);
return 0;
}
encoder->private_->frame = FLAC__bitbuffer_new();
if(encoder->private_->frame == 0) {
free(encoder->private_);
free(encoder->protected_);
free(encoder);
return 0;
}
encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
......@@ -230,7 +237,9 @@ void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder)
FLAC__ASSERT(encoder != 0);
FLAC__ASSERT(encoder->protected_ != 0);
FLAC__ASSERT(encoder->private_ != 0);
FLAC__ASSERT(encoder->private_->frame != 0);
FLAC__bitbuffer_delete(encoder->private_->frame);
free(encoder->private_);
free(encoder->protected_);
free(encoder);
......@@ -421,15 +430,14 @@ FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder *encoder)
/* the above function sets the state for us in case of an error */
return encoder->protected_->state;
}
FLAC__bitbuffer_init(&encoder->private_->frame);
if(!FLAC__bitbuffer_init(encoder->private_->frame))
return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
/*
* write the stream header
*/
if(!FLAC__bitbuffer_clear(&encoder->private_->frame))
return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
if(!FLAC__bitbuffer_write_raw_uint32(&encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN))
if(!FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN))
return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
encoder->private_->metadata.type = FLAC__METADATA_TYPE_STREAMINFO;
......@@ -445,7 +453,7 @@ FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder *encoder)
encoder->private_->metadata.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */
memset(encoder->private_->metadata.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */
MD5Init(&encoder->private_->md5context);
if(!FLAC__add_metadata_block(&encoder->private_->metadata, &encoder->private_->frame))
if(!FLAC__add_metadata_block(&encoder->private_->metadata, encoder->private_->frame))
return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
if(0 != encoder->protected_->seek_table) {
......@@ -455,7 +463,7 @@ FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder *encoder)
seek_table_block.is_last = (encoder->protected_->padding == 0 && encoder->protected_->last_metadata_is_last);
seek_table_block.length = encoder->protected_->seek_table->num_points * FLAC__STREAM_METADATA_SEEKPOINT_LEN;
seek_table_block.data.seek_table = *encoder->protected_->seek_table;
if(!FLAC__add_metadata_block(&seek_table_block, &encoder->private_->frame))
if(!FLAC__add_metadata_block(&seek_table_block, encoder->private_->frame))
return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
}
......@@ -464,14 +472,22 @@ FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder *encoder)
padding_block.type = FLAC__METADATA_TYPE_PADDING;
padding_block.is_last = encoder->protected_->last_metadata_is_last;
padding_block.length = encoder->protected_->padding;
if(!FLAC__add_metadata_block(&padding_block, &encoder->private_->frame))
if(!FLAC__add_metadata_block(&padding_block, encoder->private_->frame))
return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
}
FLAC__ASSERT(encoder->private_->frame.bits == 0); /* assert that we're byte-aligned before writing */
FLAC__ASSERT(encoder->private_->frame.total_consumed_bits == 0); /* assert that no reading of the buffer was done */
if(encoder->private_->write_callback(encoder, encoder->private_->frame.buffer, encoder->private_->frame.bytes, 0, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_OK)
return encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING;
FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
{
FLAC__byte *buffer;
unsigned bytes;
FLAC__bitbuffer_get_buffer(encoder->private_->frame, &buffer, &bytes);
if(encoder->private_->write_callback(encoder, buffer, bytes, 0, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_OK)
return encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING;
FLAC__bitbuffer_release_buffer(encoder->private_->frame);
}
/* now that the metadata block is written, we can init this to an absurdly-high value... */
encoder->private_->metadata.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1;
......@@ -542,7 +558,7 @@ void FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
free(encoder->private_->raw_bits_per_partition_unaligned);
encoder->private_->raw_bits_per_partition_unaligned = 0;
}
FLAC__bitbuffer_free(&encoder->private_->frame);
FLAC__bitbuffer_free(encoder->private_->frame);
encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
}
......@@ -973,6 +989,9 @@ FLAC__bool stream_encoder_resize_buffers_(FLAC__StreamEncoder *encoder, unsigned
FLAC__bool stream_encoder_process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame)
{
const FLAC__byte *buffer;
unsigned bytes;
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
/*
......@@ -995,7 +1014,7 @@ FLAC__bool stream_encoder_process_frame_(FLAC__StreamEncoder *encoder, FLAC__boo
/*
* Zero-pad the frame to a byte_boundary
*/
if(!FLAC__bitbuffer_zero_pad_to_byte_boundary(&encoder->private_->frame)) {
if(!FLAC__bitbuffer_zero_pad_to_byte_boundary(encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return false;
}
......@@ -1003,17 +1022,18 @@ FLAC__bool stream_encoder_process_frame_(FLAC__StreamEncoder *encoder, FLAC__boo
/*
* CRC-16 the whole thing
*/
FLAC__ASSERT(encoder->private_->frame.bits == 0); /* assert that we're byte-aligned */
FLAC__ASSERT(encoder->private_->frame.total_consumed_bits == 0); /* assert that no reading of the buffer was done */
FLAC__bitbuffer_write_raw_uint32(&encoder->private_->frame, FLAC__crc16(encoder->private_->frame.buffer, encoder->private_->frame.bytes), FLAC__FRAME_FOOTER_CRC_LEN);
FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__bitbuffer_get_write_crc16(encoder->private_->frame), FLAC__FRAME_FOOTER_CRC_LEN);
/*
* Write it
*/
if(encoder->private_->write_callback(encoder, encoder->private_->frame.buffer, encoder->private_->frame.bytes, encoder->protected_->blocksize, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_OK) {
FLAC__bitbuffer_get_buffer(encoder->private_->frame, &buffer, &bytes);
if(encoder->private_->write_callback(encoder, buffer, bytes, encoder->protected_->blocksize, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_OK) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING;
return false;
}
FLAC__bitbuffer_release_buffer(encoder->private_->frame);
/*
* Get ready for the next frame
......@@ -1021,8 +1041,8 @@ FLAC__bool stream_encoder_process_frame_(FLAC__StreamEncoder *encoder, FLAC__boo
encoder->private_->current_sample_number = 0;
encoder->private_->current_frame_number++;
encoder->private_->metadata.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize;
encoder->private_->metadata.data.stream_info.min_framesize = min(encoder->private_->frame.bytes, encoder->private_->metadata.data.stream_info.min_framesize);
encoder->private_->metadata.data.stream_info.max_framesize = max(encoder->private_->frame.bytes, encoder->private_->metadata.data.stream_info.max_framesize);
encoder->private_->metadata.data.stream_info.min_framesize = min(bytes, encoder->private_->metadata.data.stream_info.min_framesize);
encoder->private_->metadata.data.stream_info.max_framesize = max(bytes, encoder->private_->metadata.data.stream_info.max_framesize);
return true;
}
......@@ -1054,7 +1074,7 @@ FLAC__bool stream_encoder_process_subframes_(FLAC__StreamEncoder *encoder, FLAC_
/*
* Setup the frame
*/
if(!FLAC__bitbuffer_clear(&encoder->private_->frame)) {
if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return false;
}
......@@ -1171,7 +1191,7 @@ FLAC__bool stream_encoder_process_subframes_(FLAC__StreamEncoder *encoder, FLAC_
frame_header.channel_assignment = channel_assignment;
if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, &encoder->private_->frame)) {
if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return false;
}
......@@ -1219,19 +1239,19 @@ FLAC__bool stream_encoder_process_subframes_(FLAC__StreamEncoder *encoder, FLAC_
}
/* note that encoder_add_subframe_ sets the state for us in case of an error */
if(!stream_encoder_add_subframe_(encoder, &frame_header, left_bps , left_subframe , &encoder->private_->frame))
if(!stream_encoder_add_subframe_(encoder, &frame_header, left_bps , left_subframe , encoder->private_->frame))
return false;
if(!stream_encoder_add_subframe_(encoder, &frame_header, right_bps, right_subframe, &encoder->private_->frame))
if(!stream_encoder_add_subframe_(encoder, &frame_header, right_bps, right_subframe, encoder->private_->frame))
return false;
}
else {
if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, &encoder->private_->frame)) {
if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return false;
}
for(channel = 0; channel < encoder->protected_->channels; channel++) {
if(!stream_encoder_add_subframe_(encoder, &frame_header, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], &encoder->private_->frame)) {
if(!stream_encoder_add_subframe_(encoder, &frame_header, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], encoder->private_->frame)) {
/* the above function sets the state for us in case of an error */
return false;
}
......
src/libFLAC/stream_encoder_framing.c
View file @ aec256bf
......@@ -114,12 +114,9 @@ FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetaData *metadata, FLAC__
FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__bool streamable_subset, FLAC__bool is_last_block, FLAC__BitBuffer *bb)
{
unsigned u, crc8_start, blocksize_hint, sample_rate_hint;
FLAC__byte crc8;
unsigned u, blocksize_hint, sample_rate_hint;
FLAC__ASSERT(bb->bits == 0); /* assert that we're byte-aligned before writing */
crc8_start = bb->bytes;
FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(bb));
if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
return false;
......@@ -246,10 +243,7 @@ FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__bool st
}
/* write the CRC */
FLAC__ASSERT(bb->buffer[crc8_start] == 0xff); /* MAGIC NUMBER for the first byte of the sync code */
FLAC__ASSERT(bb->bits == 0); /* assert that we're byte-aligned */
crc8 = FLAC__crc8(bb->buffer+crc8_start, bb->bytes-crc8_start);
if(!FLAC__bitbuffer_write_raw_uint32(bb, crc8, FLAC__FRAME_HEADER_CRC_LEN))
if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__bitbuffer_get_write_crc8(bb), FLAC__FRAME_HEADER_CRC_LEN))
return false;
return true;
......
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