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-rw-r--r--src/decoder/plugins/AudiofileDecoderPlugin.cxx297
1 files changed, 297 insertions, 0 deletions
diff --git a/src/decoder/plugins/AudiofileDecoderPlugin.cxx b/src/decoder/plugins/AudiofileDecoderPlugin.cxx
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+++ b/src/decoder/plugins/AudiofileDecoderPlugin.cxx
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+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "AudiofileDecoderPlugin.hxx"
+#include "../DecoderAPI.hxx"
+#include "input/InputStream.hxx"
+#include "CheckAudioFormat.hxx"
+#include "tag/TagHandler.hxx"
+#include "fs/Path.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "Log.hxx"
+
+#include <audiofile.h>
+#include <af_vfs.h>
+
+#include <assert.h>
+#include <stdio.h>
+
+static constexpr Domain audiofile_domain("audiofile");
+
+static void
+audiofile_error_func(long, const char *msg)
+{
+ LogWarning(audiofile_domain, msg);
+}
+
+static bool
+audiofile_init(const config_param &)
+{
+ afSetErrorHandler(audiofile_error_func);
+ return true;
+}
+
+struct AudioFileInputStream {
+ Decoder *const decoder;
+ InputStream &is;
+
+ size_t Read(void *buffer, size_t size) {
+ /* libaudiofile does not like partial reads at all,
+ and will abort playback; therefore always force full
+ reads */
+ return decoder_read_full(decoder, is, buffer, size)
+ ? size
+ : 0;
+ }
+};
+
+gcc_pure
+static SongTime
+audiofile_get_duration(AFfilehandle fh)
+{
+ return SongTime::FromScale<uint64_t>(afGetFrameCount(fh, AF_DEFAULT_TRACK),
+ afGetRate(fh, AF_DEFAULT_TRACK));
+}
+
+static ssize_t
+audiofile_file_read(AFvirtualfile *vfile, void *data, size_t length)
+{
+ AudioFileInputStream &afis = *(AudioFileInputStream *)vfile->closure;
+
+ return afis.Read(data, length);
+}
+
+static AFfileoffset
+audiofile_file_length(AFvirtualfile *vfile)
+{
+ AudioFileInputStream &afis = *(AudioFileInputStream *)vfile->closure;
+ InputStream &is = afis.is;
+
+ return is.GetSize();
+}
+
+static AFfileoffset
+audiofile_file_tell(AFvirtualfile *vfile)
+{
+ AudioFileInputStream &afis = *(AudioFileInputStream *)vfile->closure;
+ InputStream &is = afis.is;
+
+ return is.GetOffset();
+}
+
+static void
+audiofile_file_destroy(AFvirtualfile *vfile)
+{
+ assert(vfile->closure != nullptr);
+
+ vfile->closure = nullptr;
+}
+
+static AFfileoffset
+audiofile_file_seek(AFvirtualfile *vfile, AFfileoffset _offset,
+ int is_relative)
+{
+ AudioFileInputStream &afis = *(AudioFileInputStream *)vfile->closure;
+ InputStream &is = afis.is;
+
+ offset_type offset = _offset;
+ if (is_relative)
+ offset += is.GetOffset();
+
+ Error error;
+ if (is.LockSeek(offset, error)) {
+ return is.GetOffset();
+ } else {
+ LogError(error, "Seek failed");
+ return -1;
+ }
+}
+
+static AFvirtualfile *
+setup_virtual_fops(AudioFileInputStream &afis)
+{
+ AFvirtualfile *vf = new AFvirtualfile();
+ vf->closure = &afis;
+ vf->write = nullptr;
+ vf->read = audiofile_file_read;
+ vf->length = audiofile_file_length;
+ vf->destroy = audiofile_file_destroy;
+ vf->seek = audiofile_file_seek;
+ vf->tell = audiofile_file_tell;
+ return vf;
+}
+
+static SampleFormat
+audiofile_bits_to_sample_format(int bits)
+{
+ switch (bits) {
+ case 8:
+ return SampleFormat::S8;
+
+ case 16:
+ return SampleFormat::S16;
+
+ case 24:
+ return SampleFormat::S24_P32;
+
+ case 32:
+ return SampleFormat::S32;
+ }
+
+ return SampleFormat::UNDEFINED;
+}
+
+static SampleFormat
+audiofile_setup_sample_format(AFfilehandle af_fp)
+{
+ int fs, bits;
+
+ afGetSampleFormat(af_fp, AF_DEFAULT_TRACK, &fs, &bits);
+ if (!audio_valid_sample_format(audiofile_bits_to_sample_format(bits))) {
+ FormatDebug(audiofile_domain,
+ "input file has %d bit samples, converting to 16",
+ bits);
+ bits = 16;
+ }
+
+ afSetVirtualSampleFormat(af_fp, AF_DEFAULT_TRACK,
+ AF_SAMPFMT_TWOSCOMP, bits);
+ afGetVirtualSampleFormat(af_fp, AF_DEFAULT_TRACK, &fs, &bits);
+
+ return audiofile_bits_to_sample_format(bits);
+}
+
+static void
+audiofile_stream_decode(Decoder &decoder, InputStream &is)
+{
+ if (!is.IsSeekable() || !is.KnownSize()) {
+ LogWarning(audiofile_domain, "not seekable");
+ return;
+ }
+
+ AudioFileInputStream afis{&decoder, is};
+ AFvirtualfile *const vf = setup_virtual_fops(afis);
+
+ const AFfilehandle fh = afOpenVirtualFile(vf, "r", nullptr);
+ if (fh == AF_NULL_FILEHANDLE)
+ return;
+
+ Error error;
+ AudioFormat audio_format;
+ if (!audio_format_init_checked(audio_format,
+ afGetRate(fh, AF_DEFAULT_TRACK),
+ audiofile_setup_sample_format(fh),
+ afGetVirtualChannels(fh, AF_DEFAULT_TRACK),
+ error)) {
+ LogError(error);
+ afCloseFile(fh);
+ return;
+ }
+
+ const auto total_time = audiofile_get_duration(fh);
+
+ const uint16_t kbit_rate = (uint16_t)
+ (is.GetSize() * uint64_t(8000) / total_time.ToMS());
+
+ const unsigned frame_size = (unsigned)
+ afGetVirtualFrameSize(fh, AF_DEFAULT_TRACK, true);
+
+ decoder_initialized(decoder, audio_format, true, total_time);
+
+ DecoderCommand cmd;
+ do {
+ /* pick 1020 since its divisible for 8,16,24, and
+ 32-bit audio */
+ char chunk[1020];
+ const int nframes =
+ afReadFrames(fh, AF_DEFAULT_TRACK, chunk,
+ sizeof(chunk) / frame_size);
+ if (nframes <= 0)
+ break;
+
+ cmd = decoder_data(decoder, nullptr,
+ chunk, nframes * frame_size,
+ kbit_rate);
+
+ if (cmd == DecoderCommand::SEEK) {
+ AFframecount frame = decoder_seek_where_frame(decoder);
+ afSeekFrame(fh, AF_DEFAULT_TRACK, frame);
+
+ decoder_command_finished(decoder);
+ cmd = DecoderCommand::NONE;
+ }
+ } while (cmd == DecoderCommand::NONE);
+
+ afCloseFile(fh);
+}
+
+gcc_pure
+static SignedSongTime
+audiofile_get_duration(InputStream &is)
+{
+ if (!is.IsSeekable() || !is.KnownSize())
+ return SignedSongTime::Negative();
+
+ AudioFileInputStream afis{nullptr, is};
+ AFvirtualfile *vf = setup_virtual_fops(afis);
+ AFfilehandle fh = afOpenVirtualFile(vf, "r", nullptr);
+ if (fh == AF_NULL_FILEHANDLE)
+ return SignedSongTime::Negative();
+
+ const auto duration = audiofile_get_duration(fh);
+ afCloseFile(fh);
+ return duration;
+}
+
+static bool
+audiofile_scan_stream(InputStream &is,
+ const struct tag_handler *handler, void *handler_ctx)
+{
+ const auto duration = audiofile_get_duration(is);
+ if (duration.IsNegative())
+ return false;
+
+ tag_handler_invoke_duration(handler, handler_ctx, SongTime(duration));
+ return true;
+}
+
+static const char *const audiofile_suffixes[] = {
+ "wav", "au", "aiff", "aif", nullptr
+};
+
+static const char *const audiofile_mime_types[] = {
+ "audio/x-wav",
+ "audio/x-aiff",
+ nullptr
+};
+
+const struct DecoderPlugin audiofile_decoder_plugin = {
+ "audiofile",
+ audiofile_init,
+ nullptr,
+ audiofile_stream_decode,
+ nullptr,
+ nullptr,
+ audiofile_scan_stream,
+ nullptr,
+ audiofile_suffixes,
+ audiofile_mime_types,
+};