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decoder/HybridDSD: implement seeking

This commit is contained in:
Max Kellermann 2018-02-13 09:53:05 +01:00
parent 60dbf1bea0
commit 61f2ce67dd
1 changed files with 26 additions and 6 deletions
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32
src/decoder/plugins/HybridDsdDecoderPlugin.cxx
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@ -177,30 +177,33 @@ HybridDsdDecode(DecoderClient &client, InputStream &input)
streams */
return;
offset_type remaining_bytes;
uint64_t total_frames;
size_t frame_size;
unsigned kbit_rate;
try {
auto result = FindHybridDsdData(client, input);
auto duration = SignedSongTime::FromS(result.second / result.first.GetTimeToSize());
client.Ready(result.first,
/* TODO: implement seeking */ false,
duration);
client.Ready(result.first, true, duration);
frame_size = result.first.GetFrameSize();
kbit_rate = frame_size * result.first.sample_rate /
(1024u / 8u);
remaining_bytes = result.second;
total_frames = result.second / frame_size;
} catch (UnsupportedFile) {
/* not a Hybrid-DSD file; let the next decoder plugin
(e.g. FFmpeg) handle it */
return;
}
const offset_type start_offset = input.GetOffset();
offset_type remaining_bytes = total_frames * frame_size;
StaticFifoBuffer<uint8_t, 16384> buffer;
auto cmd = client.GetCommand();
while (remaining_bytes > 0) {
uint64_t seek_frame;
switch (cmd) {
case DecoderCommand::NONE:
case DecoderCommand::START:
@ -210,7 +213,24 @@ HybridDsdDecode(DecoderClient &client, InputStream &input)
return;
case DecoderCommand::SEEK:
// TODO: implement seeking
seek_frame = client.GetSeekFrame();
if (seek_frame >= total_frames) {
/* seeking past the end */
client.CommandFinished();
return;
}
try {
input.LockSeek(start_offset + seek_frame * frame_size);
remaining_bytes = (total_frames - seek_frame) * frame_size;
buffer.Clear();
client.CommandFinished();
} catch (...) {
LogError(std::current_exception());
client.SeekError();
}
cmd = DecoderCommand::NONE;
break;
}