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add a "tell" callback to the seekable stream encoder to make the metadata writeback more robust

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This commit is contained in:
Josh Coalson
2003-09-25 04:01:49 +00:00
parent 792ddbf4c5
commit 6e2c6d9958
8 changed files with 237 additions and 54 deletions
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2
include/FLAC++/encoder.h
View File

@@ -249,11 +249,13 @@ namespace FLAC {
bool process_interleaved(const FLAC__int32 buffer[], unsigned samples);
protected:
virtual ::FLAC__SeekableStreamEncoderSeekStatus seek_callback(FLAC__uint64 absolute_byte_offset) = 0;
virtual ::FLAC__SeekableStreamEncoderTellStatus tell_callback(FLAC__uint64 *absolute_byte_offset) = 0;
virtual ::FLAC__StreamEncoderWriteStatus write_callback(const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame) = 0;
::FLAC__SeekableStreamEncoder *encoder_;
private:
static ::FLAC__SeekableStreamEncoderSeekStatus seek_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data);
static ::FLAC__SeekableStreamEncoderTellStatus tell_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
static ::FLAC__StreamEncoderWriteStatus write_callback_(const FLAC__SeekableStreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
// Private and undefined so you can't use them:

74
include/FLAC/seekable_stream_encoder.h
View File

@@ -77,11 +77,12 @@ extern "C" {
*
* The seekable stream encoder is a wrapper around the
* \link flac_stream_encoder stream encoder \endlink with callbacks for
* seeking the output. This allows the encoder to go back and rewrite
* some of the metadata after encoding if necessary, and provides the
* metadata callback of the stream encoder internally. However, you
* must provide a seek callback (see
* FLAC__seekable_stream_encoder_set_seek_callback()).
* seeking the output and reporting the output stream position. This
* allows the encoder to go back and rewrite some of the metadata after
* encoding if necessary, and provides the metadata callback of the stream
* encoder internally. However, you must provide seek and tell callbacks
* (see FLAC__seekable_stream_encoder_set_seek_callback() and
* FLAC__seekable_stream_encoder_set_tell_callback()).
*
* Make sure to read the detailed description of the
* \link flac_stream_encoder stream encoder module \endlink since the
@@ -135,6 +136,9 @@ typedef enum {
FLAC__SEEKABLE_STREAM_ENCODER_SEEK_ERROR,
/**< The seek callback returned an error. */
FLAC__SEEKABLE_STREAM_ENCODER_TELL_ERROR,
/**< The tell callback returned an error. */
FLAC__SEEKABLE_STREAM_ENCODER_ALREADY_INITIALIZED,
/**< FLAC__seekable_stream_encoder_init() was called when the encoder was
* already initialized, usually because
@@ -184,6 +188,26 @@ typedef enum {
extern FLAC_API const char * const FLAC__SeekableStreamEncoderSeekStatusString[];
/** Return values for the FLAC__SeekableStreamEncoder tell callback.
*/
typedef enum {
FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_OK,
/**< The tell was OK and encoding can continue. */
FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_ERROR
/**< An unrecoverable error occurred. The encoder will return from the process call. */
} FLAC__SeekableStreamEncoderTellStatus;
/** Maps a FLAC__SeekableStreamEncoderTellStatus to a C string.
*
* Using a FLAC__SeekableStreamEncoderTellStatus as the index to this array
* will give the string equivalent. The contents should not be modified.
*/
extern FLAC_API const char * const FLAC__SeekableStreamEncoderTellStatusString[];
/***********************************************************************
*
* class FLAC__SeekableStreamEncoder
@@ -214,6 +238,28 @@ typedef struct {
*/
typedef FLAC__SeekableStreamEncoderSeekStatus (*FLAC__SeekableStreamEncoderSeekCallback)(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data);
/** Signature for the tell callback.
* See FLAC__seekable_stream_encoder_set_tell_callback() for more info.
*
* \warning
* The callback must return the true current byte offset of the output to
* which the encoder is writing. If you are buffering the output, make
* sure and take this into account. If you are writing directly to a
* FILE* from your write callback, ftell() is sufficient. If you are
* writing directly to a file descriptor from your write callback, you
* can use lseek(fd, SEEK_CUR, 0). The encoder may later seek back to
* these points to rewrite metadata after encoding.
*
* \param encoder The encoder instance calling the callback.
* \param absolute_byte_offset The address at which to store the current
* position of the output.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_encoder_set_client_data().
* \retval FLAC__SeekableStreamEncoderTellStatus
* The callee's return status.
*/
typedef FLAC__SeekableStreamEncoderTellStatus (*FLAC__SeekableStreamEncoderTellCallback)(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
/** Signature for the write callback.
* See FLAC__seekable_stream_encoder_set_write_callback()
* and FLAC__StreamEncoderWriteCallback for more info.
@@ -542,6 +588,24 @@ FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_metadata(FLAC__SeekableStr
*/
FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_seek_callback(FLAC__SeekableStreamEncoder *encoder, FLAC__SeekableStreamEncoderSeekCallback value);
/** Set the tell callback.
* The supplied function will be called when the encoder needs to know
* the current position of the output stream.
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param encoder An encoder instance to set.
* \param value See above.
* \assert
* \code encoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the encoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_tell_callback(FLAC__SeekableStreamEncoder *encoder, FLAC__SeekableStreamEncoderTellCallback value);
/** Set the write callback.
* This is inherited from FLAC__StreamEncoder; see
* FLAC__stream_encoder_set_write_callback().

10
src/libFLAC++/seekable_stream_encoder.cpp
View File

@@ -290,6 +290,7 @@ namespace FLAC {
{
FLAC__ASSERT(is_valid());
::FLAC__seekable_stream_encoder_set_seek_callback(encoder_, seek_callback_);
::FLAC__seekable_stream_encoder_set_tell_callback(encoder_, tell_callback_);
::FLAC__seekable_stream_encoder_set_write_callback(encoder_, write_callback_);
::FLAC__seekable_stream_encoder_set_client_data(encoder_, (void*)this);
return State(::FLAC__seekable_stream_encoder_init(encoder_));
@@ -322,6 +323,15 @@ namespace FLAC {
return instance->seek_callback(absolute_byte_offset);
}
::FLAC__SeekableStreamEncoderTellStatus SeekableStream::tell_callback_(const ::FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
{
(void)encoder;
FLAC__ASSERT(0 != client_data);
SeekableStream *instance = reinterpret_cast<SeekableStream *>(client_data);
FLAC__ASSERT(0 != instance);
return instance->tell_callback(absolute_byte_offset);
}
::FLAC__StreamEncoderWriteStatus SeekableStream::write_callback_(const ::FLAC__SeekableStreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
{
(void)encoder;

22
src/libFLAC/file_encoder.c
View File

@@ -49,6 +49,7 @@ extern FLAC__bool FLAC__seekable_stream_encoder_disable_verbatim_subframes(FLAC_
static void set_defaults_(FLAC__FileEncoder *encoder);
static FLAC__SeekableStreamEncoderSeekStatus seek_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data);
static FLAC__SeekableStreamEncoderTellStatus tell_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
static FLAC__StreamEncoderWriteStatus write_callback_(const FLAC__SeekableStreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
/***********************************************************************
@@ -174,6 +175,7 @@ FLAC_API FLAC__FileEncoderState FLAC__file_encoder_init(FLAC__FileEncoder *encod
encoder->private_->samples_written = 0;
FLAC__seekable_stream_encoder_set_seek_callback(encoder->private_->seekable_stream_encoder, seek_callback_);
FLAC__seekable_stream_encoder_set_tell_callback(encoder->private_->seekable_stream_encoder, tell_callback_);
FLAC__seekable_stream_encoder_set_write_callback(encoder->private_->seekable_stream_encoder, write_callback_);
FLAC__seekable_stream_encoder_set_client_data(encoder->private_->seekable_stream_encoder, encoder);
@@ -711,6 +713,26 @@ FLAC__SeekableStreamEncoderSeekStatus seek_callback_(const FLAC__SeekableStreamE
return FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK;
}
FLAC__SeekableStreamEncoderSeekStatus tell_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
{
FLAC__FileEncoder *file_encoder = (FLAC__FileEncoder*)client_data;
long offset;
(void)encoder;
FLAC__ASSERT(0 != file_encoder);
offset = ftell(file_encoder->private_->file);
if(offset < 0) {
return FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_ERROR;
}
else {
*absolute_byte_offset = (FLAC__uint64)offset;
return FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_OK;
}
}
#ifdef FLAC__VALGRIND_TESTING
static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
{

1
src/libFLAC/include/protected/seekable_stream_encoder.h
View File

@@ -36,6 +36,7 @@
typedef struct FLAC__SeekableStreamEncoderProtected {
FLAC__SeekableStreamEncoderState state;
FLAC__uint64 streaminfo_offset, seektable_offset, audio_offset;
} FLAC__SeekableStreamEncoderProtected;
#endif

105
src/libFLAC/seekable_stream_encoder.c
View File

@@ -64,14 +64,13 @@ static void metadata_callback_(const FLAC__StreamEncoder *encoder, const FLAC__S
typedef struct FLAC__SeekableStreamEncoderPrivate {
FLAC__SeekableStreamEncoderSeekCallback seek_callback;
FLAC__SeekableStreamEncoderTellCallback tell_callback;
FLAC__SeekableStreamEncoderWriteCallback write_callback;
void *client_data;
FLAC__StreamEncoder *stream_encoder;
FLAC__StreamMetadata_SeekTable *seek_table;
/* internal vars (all the above are class settings) */
unsigned first_seekpoint_to_check;
FLAC__uint64 stream_offset, seektable_offset;
FLAC__uint64 bytes_written;
FLAC__uint64 samples_written;
} FLAC__SeekableStreamEncoderPrivate;
@@ -88,6 +87,7 @@ FLAC_API const char * const FLAC__SeekableStreamEncoderStateString[] = {
"FLAC__SEEKABLE_STREAM_ENCODER_WRITE_ERROR",
"FLAC__SEEKABLE_STREAM_ENCODER_READ_ERROR",
"FLAC__SEEKABLE_STREAM_ENCODER_SEEK_ERROR",
"FLAC__SEEKABLE_STREAM_ENCODER_TELL_ERROR",
"FLAC__SEEKABLE_STREAM_ENCODER_ALREADY_INITIALIZED",
"FLAC__SEEKABLE_STREAM_ENCODER_INVALID_CALLBACK",
"FLAC__SEEKABLE_STREAM_ENCODER_INVALID_SEEKTABLE",
@@ -99,6 +99,11 @@ FLAC_API const char * const FLAC__SeekableStreamEncoderSeekStatusString[] = {
"FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_ERROR"
};
FLAC_API const char * const FLAC__SeekableStreamEncoderTellStatusString[] = {
"FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_OK",
"FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_ERROR"
};
/***********************************************************************
*
@@ -175,21 +180,21 @@ FLAC_API FLAC__SeekableStreamEncoderState FLAC__seekable_stream_encoder_init(FLA
if(encoder->protected_->state != FLAC__SEEKABLE_STREAM_ENCODER_UNINITIALIZED)
return encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_ALREADY_INITIALIZED;
if(0 == encoder->private_->seek_callback || 0 == encoder->private_->write_callback)
if(0 == encoder->private_->seek_callback || 0 == encoder->private_->tell_callback || 0 == encoder->private_->write_callback)
return encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_INVALID_CALLBACK;
if(0 != encoder->private_->seek_table && !FLAC__format_seektable_is_legal(encoder->private_->seek_table))
return encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_INVALID_SEEKTABLE;
/*
* This must be done before we init the stream encoder because that
* These must be done before we init the stream encoder because that
* calls the write_callback, which uses these values.
*/
encoder->private_->first_seekpoint_to_check = 0;
encoder->private_->stream_offset = 0;
encoder->private_->seektable_offset = 0;
encoder->private_->bytes_written = 0;
encoder->private_->samples_written = 0;
encoder->protected_->streaminfo_offset = 0;
encoder->protected_->seektable_offset = 0;
encoder->protected_->audio_offset = 0;
FLAC__stream_encoder_set_write_callback(encoder->private_->stream_encoder, write_callback_);
FLAC__stream_encoder_set_metadata_callback(encoder->private_->stream_encoder, metadata_callback_);
@@ -202,7 +207,8 @@ FLAC_API FLAC__SeekableStreamEncoderState FLAC__seekable_stream_encoder_init(FLA
* Initializing the stream encoder writes all the metadata, so we
* save the stream offset now.
*/
encoder->private_->stream_offset = encoder->private_->bytes_written;
if(encoder->private_->tell_callback(encoder, &encoder->protected_->audio_offset, encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_OK)
return encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_TELL_ERROR;
return encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_OK;
}
@@ -443,6 +449,17 @@ FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_seek_callback(FLAC__Seekab
return true;
}
FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_tell_callback(FLAC__SeekableStreamEncoder *encoder, FLAC__SeekableStreamEncoderTellCallback value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__SEEKABLE_STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->private_->tell_callback = value;
return true;
}
FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_write_callback(FLAC__SeekableStreamEncoder *encoder, FLAC__SeekableStreamEncoderWriteCallback value)
{
FLAC__ASSERT(0 != encoder);
@@ -692,6 +709,7 @@ void set_defaults_(FLAC__SeekableStreamEncoder *encoder)
FLAC__ASSERT(0 != encoder->protected_);
encoder->private_->seek_callback = 0;
encoder->private_->tell_callback = 0;
encoder->private_->write_callback = 0;
encoder->private_->client_data = 0;
@@ -702,19 +720,28 @@ FLAC__StreamEncoderWriteStatus write_callback_(const FLAC__StreamEncoder *encode
{
FLAC__SeekableStreamEncoder *seekable_stream_encoder = (FLAC__SeekableStreamEncoder*)client_data;
FLAC__StreamEncoderWriteStatus status;
FLAC__uint64 output_position;
if(seekable_stream_encoder->private_->tell_callback(seekable_stream_encoder, &output_position, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_OK)
return encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_TELL_ERROR;
/*
* Watch for the first SEEKTABLE block to go by and store its offset.
* Watch for the STREAMINFO block and first SEEKTABLE block to go by and store their offsets.
*/
if(samples == 0 && (buffer[0] & 0x7f) == FLAC__METADATA_TYPE_SEEKTABLE)
seekable_stream_encoder->private_->seektable_offset = seekable_stream_encoder->private_->bytes_written;
if(samples == 0) {
FLAC__MetadataType type = (buffer[0] & 0x7f);
if(type == FLAC__METADATA_TYPE_STREAMINFO)
seekable_stream_encoder->protected_->streaminfo_offset = output_position;
else if(type == FLAC__METADATA_TYPE_SEEKTABLE && seekable_stream_encoder->protected_->seektable_offset == 0)
seekable_stream_encoder->protected_->seektable_offset = output_position;
}
/*
* Mark the current seek point if hit (if stream_offset == 0 that
* Mark the current seek point if hit (if audio_offset == 0 that
* means we're still writing metadata and haven't hit the first
* frame yet)
*/
if(0 != seekable_stream_encoder->private_->seek_table && seekable_stream_encoder->private_->stream_offset > 0 && seekable_stream_encoder->private_->seek_table->num_points > 0) {
if(0 != seekable_stream_encoder->private_->seek_table && seekable_stream_encoder->protected_->audio_offset > 0 && seekable_stream_encoder->private_->seek_table->num_points > 0) {
const unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
const FLAC__uint64 frame_first_sample = seekable_stream_encoder->private_->samples_written;
const FLAC__uint64 frame_last_sample = frame_first_sample + (FLAC__uint64)blocksize - 1;
@@ -727,7 +754,7 @@ FLAC__StreamEncoderWriteStatus write_callback_(const FLAC__StreamEncoder *encode
}
else if(test_sample >= frame_first_sample) {
seekable_stream_encoder->private_->seek_table->points[i].sample_number = frame_first_sample;
seekable_stream_encoder->private_->seek_table->points[i].stream_offset = seekable_stream_encoder->private_->bytes_written - seekable_stream_encoder->private_->stream_offset;
seekable_stream_encoder->private_->seek_table->points[i].stream_offset = output_position - seekable_stream_encoder->protected_->audio_offset;
seekable_stream_encoder->private_->seek_table->points[i].frame_samples = blocksize;
seekable_stream_encoder->private_->first_seekpoint_to_check++;
/* DO NOT: "break;" and here's why:
@@ -746,7 +773,6 @@ FLAC__StreamEncoderWriteStatus write_callback_(const FLAC__StreamEncoder *encode
status = seekable_stream_encoder->private_->write_callback(seekable_stream_encoder, buffer, bytes, samples, current_frame, seekable_stream_encoder->private_->client_data);
if(status == FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
seekable_stream_encoder->private_->bytes_written += bytes;
seekable_stream_encoder->private_->samples_written += samples;
}
else
@@ -783,7 +809,21 @@ void metadata_callback_(const FLAC__StreamEncoder *encoder, const FLAC__StreamMe
/*
* Write MD5 signature
*/
if(seekable_stream_encoder->private_->seek_callback(seekable_stream_encoder, 26, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK) {
{
const unsigned md5_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
) / 8;
if(seekable_stream_encoder->private_->seek_callback(seekable_stream_encoder, seekable_stream_encoder->protected_->streaminfo_offset + md5_offset, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK) {
seekable_stream_encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_SEEK_ERROR;
return;
}
@@ -791,16 +831,31 @@ void metadata_callback_(const FLAC__StreamEncoder *encoder, const FLAC__StreamMe
seekable_stream_encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_WRITE_ERROR;
return;
}
}
/*
* Write total samples
*/
{
const unsigned total_samples_byte_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
- 4
) / 8;
b[0] = ((FLAC__byte)(bps-1) << 4) | (FLAC__byte)((samples >> 32) & 0x0F);
b[1] = (FLAC__byte)((samples >> 24) & 0xFF);
b[2] = (FLAC__byte)((samples >> 16) & 0xFF);
b[3] = (FLAC__byte)((samples >> 8) & 0xFF);
b[4] = (FLAC__byte)(samples & 0xFF);
if(seekable_stream_encoder->private_->seek_callback(seekable_stream_encoder, 21, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK) {
if(seekable_stream_encoder->private_->seek_callback(seekable_stream_encoder, seekable_stream_encoder->protected_->streaminfo_offset + total_samples_byte_offset, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK) {
seekable_stream_encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_SEEK_ERROR;
return;
}
@@ -808,17 +863,26 @@ void metadata_callback_(const FLAC__StreamEncoder *encoder, const FLAC__StreamMe
seekable_stream_encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_WRITE_ERROR;
return;
}
}
/*
* Write min/max framesize
*/
{
const unsigned min_framesize_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
) / 8;
b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF);
b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF);
b[2] = (FLAC__byte)(min_framesize & 0xFF);
b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF);
b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF);
b[5] = (FLAC__byte)(max_framesize & 0xFF);
if(seekable_stream_encoder->private_->seek_callback(seekable_stream_encoder, 12, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK) {
if(seekable_stream_encoder->private_->seek_callback(seekable_stream_encoder, seekable_stream_encoder->protected_->streaminfo_offset + min_framesize_offset, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK) {
seekable_stream_encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_SEEK_ERROR;
return;
}
@@ -826,18 +890,19 @@ void metadata_callback_(const FLAC__StreamEncoder *encoder, const FLAC__StreamMe
seekable_stream_encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_WRITE_ERROR;
return;
}
}
/*
* Write seektable
*/
if(0 != seekable_stream_encoder->private_->seek_table && seekable_stream_encoder->private_->seek_table->num_points > 0 && seekable_stream_encoder->private_->seektable_offset > 0) {
if(0 != seekable_stream_encoder->private_->seek_table && seekable_stream_encoder->private_->seek_table->num_points > 0 && seekable_stream_encoder->protected_->seektable_offset > 0) {
unsigned i;
FLAC__format_seektable_sort(seekable_stream_encoder->private_->seek_table);
FLAC__ASSERT(FLAC__format_seektable_is_legal(seekable_stream_encoder->private_->seek_table));
if(seekable_stream_encoder->private_->seek_callback(seekable_stream_encoder, seekable_stream_encoder->private_->seektable_offset + FLAC__STREAM_METADATA_HEADER_LENGTH, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK) {
if(seekable_stream_encoder->private_->seek_callback(seekable_stream_encoder, seekable_stream_encoder->protected_->seektable_offset + FLAC__STREAM_METADATA_HEADER_LENGTH, seekable_stream_encoder->private_->client_data) != FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK) {
seekable_stream_encoder->protected_->state = FLAC__SEEKABLE_STREAM_ENCODER_SEEK_ERROR;
return;
}

8
src/test_libFLAC++/encoders.cpp
View File

@@ -375,6 +375,7 @@ public:
// from FLAC::Encoder::SeekableStream
::FLAC__SeekableStreamEncoderSeekStatus seek_callback(FLAC__uint64 absolute_byte_offset);
::FLAC__SeekableStreamEncoderTellStatus tell_callback(FLAC__uint64 *absolute_byte_offset);
::FLAC__StreamEncoderWriteStatus write_callback(const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame);
bool die(const char *msg = 0) const;
@@ -387,6 +388,13 @@ public:
return ::FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK;
}
::FLAC__SeekableStreamEncoderTellStatus SeekableStreamEncoder::tell_callback(FLAC__uint64 *absolute_byte_offset)
{
(void)absolute_byte_offset;
return ::FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_OK;
}
::FLAC__StreamEncoderWriteStatus SeekableStreamEncoder::write_callback(const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame)
{
(void)buffer, (void)bytes, (void)samples, (void)current_frame;

11
src/test_libFLAC/encoders.c
View File

@@ -422,6 +422,12 @@ FLAC__SeekableStreamEncoderSeekStatus seekable_stream_encoder_seek_callback_(con
return FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK;
}
FLAC__SeekableStreamEncoderTellStatus seekable_stream_encoder_tell_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
{
(void)encoder, (void)absolute_byte_offset, (void)client_data;
return FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_OK;
}
FLAC__StreamEncoderWriteStatus seekable_stream_encoder_write_callback_(const FLAC__SeekableStreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
{
(void)encoder, (void)buffer, (void)bytes, (void)samples, (void)current_frame, (void)client_data;
@@ -545,6 +551,11 @@ static FLAC__bool test_seekable_stream_encoder()
return die_ss_("returned false", encoder);
printf("OK\n");
printf("testing FLAC__seekable_stream_encoder_set_tell_callback()... ");
if(!FLAC__seekable_stream_encoder_set_tell_callback(encoder, seekable_stream_encoder_tell_callback_))
return die_ss_("returned false", encoder);
printf("OK\n");
printf("testing FLAC__seekable_stream_encoder_set_write_callback()... ");
if(!FLAC__seekable_stream_encoder_set_write_callback(encoder, seekable_stream_encoder_write_callback_))
return die_ss_("returned false", encoder);