aboutsummaryrefslogtreecommitdiffstats
path: root/src/decoder/plugins/AudiofileDecoderPlugin.cxx
blob: 262c4a5bf181b75bc70fd2b5d484f147aa6ca316 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
/*
 * 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>

/* pick 1020 since its devisible for 8,16,24, and 32-bit audio */
#define CHUNK_SIZE		1020

static constexpr Domain audiofile_domain("audiofile");

gcc_pure
static int
audiofile_get_duration(Path path_fs)
{
	int total_time;
	AFfilehandle af_fp = afOpenFile(path_fs.c_str(), "r", nullptr);
	if (af_fp == AF_NULL_FILEHANDLE) {
		return -1;
	}
	total_time = (int)
	    ((double)afGetFrameCount(af_fp, AF_DEFAULT_TRACK)
	     / afGetRate(af_fp, AF_DEFAULT_TRACK));
	afCloseFile(af_fp);
	return total_time;
}

static ssize_t
audiofile_file_read(AFvirtualfile *vfile, void *data, size_t length)
{
	InputStream &is = *(InputStream *)vfile->closure;

	Error error;
	size_t nbytes = is.LockRead(data, length, error);
	if (nbytes == 0 && error.IsDefined()) {
		LogError(error);
		return -1;
	}

	return nbytes;
}

static AFfileoffset
audiofile_file_length(AFvirtualfile *vfile)
{
	InputStream &is = *(InputStream *)vfile->closure;
	return is.GetSize();
}

static AFfileoffset
audiofile_file_tell(AFvirtualfile *vfile)
{
	InputStream &is = *(InputStream *)vfile->closure;
	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)
{
	InputStream &is = *(InputStream *)vfile->closure;
	int whence = (is_relative ? SEEK_CUR : SEEK_SET);

	Error error;
	if (is.LockSeek(offset, whence, error)) {
		return is.GetOffset();
	} else {
		return -1;
	}
}

static AFvirtualfile *
setup_virtual_fops(InputStream &stream)
{
	AFvirtualfile *vf = new AFvirtualfile();
	vf->closure = &stream;
	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)
{
	AFvirtualfile *vf;
	int fs, frame_count;
	AFfilehandle af_fp;
	AudioFormat audio_format;
	float total_time;
	uint16_t bit_rate;
	int ret;
	char chunk[CHUNK_SIZE];

	if (!is.IsSeekable()) {
		LogWarning(audiofile_domain, "not seekable");
		return;
	}

	vf = setup_virtual_fops(is);

	af_fp = afOpenVirtualFile(vf, "r", nullptr);
	if (af_fp == AF_NULL_FILEHANDLE) {
		LogWarning(audiofile_domain, "failed to input stream");
		return;
	}

	Error error;
	if (!audio_format_init_checked(audio_format,
				       afGetRate(af_fp, AF_DEFAULT_TRACK),
				       audiofile_setup_sample_format(af_fp),
				       afGetVirtualChannels(af_fp, AF_DEFAULT_TRACK),
				       error)) {
		LogError(error);
		afCloseFile(af_fp);
		return;
	}

	frame_count = afGetFrameCount(af_fp, AF_DEFAULT_TRACK);

	total_time = ((float)frame_count / (float)audio_format.sample_rate);

	bit_rate = (uint16_t)(is.GetSize() * 8.0 / total_time / 1000.0 + 0.5);

	fs = (int)afGetVirtualFrameSize(af_fp, AF_DEFAULT_TRACK, 1);

	decoder_initialized(decoder, audio_format, true, total_time);

	DecoderCommand cmd;
	do {
		ret = afReadFrames(af_fp, AF_DEFAULT_TRACK, chunk,
				   CHUNK_SIZE / fs);
		if (ret <= 0)
			break;

		cmd = decoder_data(decoder, nullptr,
				   chunk, ret * fs,
				   bit_rate);

		if (cmd == DecoderCommand::SEEK) {
			AFframecount frame = decoder_seek_where(decoder) *
				audio_format.sample_rate;
			afSeekFrame(af_fp, AF_DEFAULT_TRACK, frame);

			decoder_command_finished(decoder);
			cmd = DecoderCommand::NONE;
		}
	} while (cmd == DecoderCommand::NONE);

	afCloseFile(af_fp);
}

static bool
audiofile_scan_file(Path path_fs,
		    const struct tag_handler *handler, void *handler_ctx)
{
	int total_time = audiofile_get_duration(path_fs);

	if (total_time < 0) {
		FormatWarning(audiofile_domain,
			      "Failed to get total song time from: %s",
			      path_fs.c_str());
		return false;
	}

	tag_handler_invoke_duration(handler, handler_ctx, total_time);
	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",
	nullptr,
	nullptr,
	audiofile_stream_decode,
	nullptr,
	audiofile_scan_file,
	nullptr,
	nullptr,
	audiofile_suffixes,
	audiofile_mime_types,
};