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
|
/*
* Copyright (C) 2003-2009 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.
*/
/*
* Common data structures and functions used by FLAC and OggFLAC
*/
#include "_flac_common.h"
#include "flac_metadata.h"
#include "flac_pcm.h"
#include <glib.h>
#include <assert.h>
void
flac_data_init(struct flac_data *data, struct decoder * decoder,
struct input_stream *input_stream)
{
pcm_buffer_init(&data->buffer);
data->have_stream_info = false;
data->first_frame = 0;
data->next_frame = 0;
data->position = 0;
data->decoder = decoder;
data->input_stream = input_stream;
data->replay_gain_info = NULL;
data->tag = NULL;
}
void
flac_data_deinit(struct flac_data *data)
{
pcm_buffer_deinit(&data->buffer);
if (data->replay_gain_info != NULL)
replay_gain_info_free(data->replay_gain_info);
if (data->tag != NULL)
tag_free(data->tag);
}
void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
struct flac_data *data)
{
const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info);
switch (block->type) {
case FLAC__METADATA_TYPE_STREAMINFO:
data->stream_info = block->data.stream_info;
data->have_stream_info = true;
audio_format_init(&data->audio_format, si->sample_rate,
si->bits_per_sample, si->channels);
break;
case FLAC__METADATA_TYPE_VORBIS_COMMENT:
if (data->replay_gain_info)
replay_gain_info_free(data->replay_gain_info);
data->replay_gain_info = flac_parse_replay_gain(block);
if (data->tag != NULL)
flac_vorbis_comments_to_tag(data->tag, NULL,
&block->data.vorbis_comment);
default:
break;
}
}
void flac_error_common_cb(const char *plugin,
const FLAC__StreamDecoderErrorStatus status,
struct flac_data *data)
{
if (decoder_get_command(data->decoder) == DECODE_COMMAND_STOP)
return;
switch (status) {
case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
g_warning("%s lost sync\n", plugin);
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
g_warning("bad %s header\n", plugin);
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
g_warning("%s crc mismatch\n", plugin);
break;
default:
g_warning("unknown %s error\n", plugin);
}
}
FLAC__StreamDecoderWriteStatus
flac_common_write(struct flac_data *data, const FLAC__Frame * frame,
const FLAC__int32 *const buf[],
FLAC__uint64 nbytes)
{
enum decoder_command cmd;
size_t buffer_size = frame->header.blocksize *
audio_format_frame_size(&data->audio_format);
void *buffer;
float position;
unsigned bit_rate;
buffer = pcm_buffer_get(&data->buffer, buffer_size);
flac_convert(buffer, data->audio_format.channels,
data->audio_format.bits, buf,
0, frame->header.blocksize);
if (data->next_frame >= data->first_frame)
position = (float)(data->next_frame - data->first_frame) /
data->audio_format.sample_rate;
else
position = 0;
if (nbytes > 0)
bit_rate = nbytes * 8 * frame->header.sample_rate /
(1000 * frame->header.blocksize);
else
bit_rate = 0;
cmd = decoder_data(data->decoder, data->input_stream,
buffer, buffer_size,
position, bit_rate,
data->replay_gain_info);
data->next_frame += frame->header.blocksize;
switch (cmd) {
case DECODE_COMMAND_NONE:
case DECODE_COMMAND_START:
break;
case DECODE_COMMAND_STOP:
return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
case DECODE_COMMAND_SEEK:
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
#if defined(FLAC_API_VERSION_CURRENT) && FLAC_API_VERSION_CURRENT > 7
char*
flac_cue_track( const char* pathname,
const unsigned int tnum)
{
FLAC__bool success;
FLAC__StreamMetadata* cs;
success = FLAC__metadata_get_cuesheet(pathname, &cs);
if (!success)
return NULL;
assert(cs != NULL);
if (cs->data.cue_sheet.num_tracks <= 1)
{
FLAC__metadata_object_delete(cs);
return NULL;
}
if (tnum > 0 && tnum < cs->data.cue_sheet.num_tracks)
{
char* track = g_strdup_printf("track_%03u.flac", tnum);
FLAC__metadata_object_delete(cs);
return track;
}
else
{
FLAC__metadata_object_delete(cs);
return NULL;
}
}
unsigned int
flac_vtrack_tnum(const char* fname)
{
/* find last occurrence of '_' in fname
* which is hopefully something like track_xxx.flac
* another/better way would be to use tag struct
*/
char* ptr = strrchr(fname, '_');
// copy ascii tracknumber to int
char vtrack[4];
g_strlcpy(vtrack, ++ptr, 4);
return (unsigned int)strtol(vtrack, NULL, 10);
}
#endif /* FLAC_API_VERSION_CURRENT >= 7 */
|
