ce49d99c2f
Since we switched from autotools to Meson in commit
94592c1406, we don't need to include
`config.h` early to properly enable large file support. Meson passes
the required macros on the compiler command line instead of defining
them in `config.h`.
This means we can include `config.h` at any time, whenever we want to
check its macros, and there are no ordering constraints.
152 lines
3.5 KiB
C++
152 lines
3.5 KiB
C++
/*
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* Copyright 2003-2018 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* Common data structures and functions used by FLAC and OggFLAC
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*/
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#include "FlacCommon.hxx"
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#include "lib/xiph/FlacStreamMetadata.hxx"
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#include "Log.hxx"
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#include "input/InputStream.hxx"
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#include <exception>
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bool
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FlacDecoder::Initialize(unsigned sample_rate, unsigned bits_per_sample,
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unsigned channels, FLAC__uint64 total_frames)
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{
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assert(!initialized);
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assert(!unsupported);
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try {
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pcm_import.Open(sample_rate, bits_per_sample,
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channels);
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} catch (...) {
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LogError(std::current_exception());
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unsupported = true;
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return false;
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}
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const auto audio_format = pcm_import.GetAudioFormat();
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const auto duration = total_frames > 0
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? SignedSongTime::FromScale<uint64_t>(total_frames,
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audio_format.sample_rate)
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: SignedSongTime::Negative();
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GetClient()->Ready(audio_format,
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GetInputStream().IsSeekable(),
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duration);
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initialized = true;
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return true;
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}
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inline void
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FlacDecoder::OnStreamInfo(const FLAC__StreamMetadata_StreamInfo &stream_info)
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{
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if (initialized)
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return;
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Initialize(stream_info.sample_rate,
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stream_info.bits_per_sample,
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stream_info.channels,
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stream_info.total_samples);
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}
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inline void
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FlacDecoder::OnVorbisComment(const FLAC__StreamMetadata_VorbisComment &vc)
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{
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ReplayGainInfo rgi;
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if (flac_parse_replay_gain(rgi, vc))
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GetClient()->SubmitReplayGain(&rgi);
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GetClient()->SubmitMixRamp(flac_parse_mixramp(vc));
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tag = flac_vorbis_comments_to_tag(&vc);
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}
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void
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FlacDecoder::OnMetadata(const FLAC__StreamMetadata &metadata)
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{
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if (unsupported)
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return;
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switch (metadata.type) {
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case FLAC__METADATA_TYPE_STREAMINFO:
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OnStreamInfo(metadata.data.stream_info);
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break;
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case FLAC__METADATA_TYPE_VORBIS_COMMENT:
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OnVorbisComment(metadata.data.vorbis_comment);
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break;
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default:
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break;
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}
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}
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inline bool
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FlacDecoder::OnFirstFrame(const FLAC__FrameHeader &header)
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{
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if (unsupported)
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return false;
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return Initialize(header.sample_rate,
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header.bits_per_sample,
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header.channels,
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/* unknown duration */
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0);
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}
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FLAC__uint64
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FlacDecoder::GetDeltaPosition(const FLAC__StreamDecoder &sd)
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{
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FLAC__uint64 nbytes;
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if (!FLAC__stream_decoder_get_decode_position(&sd, &nbytes))
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return 0;
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if (position > 0 && nbytes > position) {
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nbytes -= position;
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position += nbytes;
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} else {
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position = nbytes;
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nbytes = 0;
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}
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return nbytes;
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}
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FLAC__StreamDecoderWriteStatus
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FlacDecoder::OnWrite(const FLAC__Frame &frame,
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const FLAC__int32 *const buf[],
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FLAC__uint64 nbytes)
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{
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if (!initialized && !OnFirstFrame(frame.header))
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return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
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chunk = pcm_import.Import(buf, frame.header.blocksize);
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kbit_rate = nbytes * 8 * frame.header.sample_rate /
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(1000 * frame.header.blocksize);
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return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
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}
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