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libFLAC/stream_decoder.c: Use current position as bound when seeking

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Robert Kausch 2020-10-29 20:37:40 +01:00 committed by Erik de Castro Lopo
parent bfd4f13f3e
commit 159cd6c41a
1 changed files with 14 additions and 3 deletions
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17
src/libFLAC/stream_decoder.c
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@ -3032,15 +3032,26 @@ FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 s
/*
* First, we set an upper and lower bound on where in the
* stream we will search. For now we assume the worst case
* scenario, which is our best guess at the beginning of
* the first frame and end of the stream.
* stream we will search. For now we take the current position
* as one bound and, depending on where the target position lies,
* the beginning of the first frame or the end of the stream as
* the other bound.
*/
lower_bound = first_frame_offset;
lower_bound_sample = 0;
upper_bound = stream_length;
upper_bound_sample = total_samples > 0 ? total_samples : target_sample /*estimate it*/;
if(decoder->protected_->state == FLAC__STREAM_DECODER_READ_FRAME) {
if(target_sample < decoder->private_->samples_decoded) {
if(FLAC__stream_decoder_get_decode_position(decoder, &upper_bound))
upper_bound_sample = decoder->private_->samples_decoded;
} else {
if(FLAC__stream_decoder_get_decode_position(decoder, &lower_bound))
lower_bound_sample = decoder->private_->samples_decoded;
}
}
/*
* Now we refine the bounds if we have a seektable with
* suitable points. Note that according to the spec they