1 files changed, 297 insertions, 0 deletions
diff --git a/src/decoder/plugins/AudiofileDecoderPlugin.cxx b/src/decoder/plugins/AudiofileDecoderPlugin.cxx
new file mode 100644
index 000000000..a0ef71e49
--- /dev/null
+++ b/src/decoder/plugins/AudiofileDecoderPlugin.cxx
@@ -0,0 +1,297 @@
+/*
+ * 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(8) / 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,
+};