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add FLAC__seekable_stream_decoder_get_decode_position()

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This commit is contained in:
Josh Coalson 2002-11-08 22:13:21 +00:00
parent 0295422716
commit 58350af879
2 changed files with 19 additions and 7 deletions
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3
include/FLAC/seekable_stream_decoder.h
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@ -756,6 +756,9 @@ FLAC_API unsigned FLAC__seekable_stream_decoder_get_sample_rate(const FLAC__Seek
*/
FLAC_API unsigned FLAC__seekable_stream_decoder_get_blocksize(const FLAC__SeekableStreamDecoder *decoder);
/*@@@@ document */
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_get_decode_position(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *position);
/** Initialize the decoder instance.
* Should be called after FLAC__seekable_stream_decoder_new() and
* FLAC__seekable_stream_decoder_set_*() but before any of the

23
src/libFLAC/seekable_stream_decoder.c
View File

@ -503,6 +503,19 @@ FLAC_API unsigned FLAC__seekable_stream_decoder_get_blocksize(const FLAC__Seekab
return FLAC__stream_decoder_get_blocksize(decoder->private_->stream_decoder);
}
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_get_decode_position(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *position)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != position);
if(decoder->private_->tell_callback(decoder, position, decoder->private_->client_data) != FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK)
return false;
FLAC__ASSERT(*position >= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder->private_->stream_decoder));
*position -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder->private_->stream_decoder);
return true;
}
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_flush(FLAC__SeekableStreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
@ -822,17 +835,13 @@ FLAC__bool seek_to_absolute_sample_(FLAC__SeekableStreamDecoder *decoder, FLAC__
approx_bytes_per_frame = 4608 * channels * bps/8 + 64;
/*
* The stream position is currently at the first frame plus any read
* ahead data, so first we get the stream position, then subtract
* uncomsumed bytes to get the position of the first frame in the
* stream.
* The decode position is currently at the first frame since we
* rewound and processed metadata.
*/
if(decoder->private_->tell_callback(decoder, &first_frame_offset, decoder->private_->client_data) != FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK) {
if(!FLAC__seekable_stream_decoder_get_decode_position(decoder, &first_frame_offset)) {
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR;
return false;
}
FLAC__ASSERT(first_frame_offset >= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder->private_->stream_decoder));
first_frame_offset -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder->private_->stream_decoder);
/*
* First, we set an upper and lower bound on where in the