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
|
/*
* Tracked MOD demuxer (libopenmpt)
* Copyright (c) 2016 Josh de Kock
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <libopenmpt/libopenmpt.h>
#include <libopenmpt/libopenmpt_stream_callbacks_file.h>
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"
typedef struct OpenMPTContext {
const AVClass *class;
openmpt_module *module;
int channels;
double duration;
/* options */
int sample_rate;
int64_t layout;
int subsong;
} OpenMPTContext;
#define OFFSET(x) offsetof(OpenMPTContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM
#define D AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 48000 }, 1000, INT_MAX, A | D },
{ "layout", "set channel layout", OFFSET(layout), AV_OPT_TYPE_CHANNEL_LAYOUT, { .i64 = AV_CH_LAYOUT_STEREO }, 0, INT64_MAX, A | D },
{ "subsong", "set subsong", OFFSET(subsong), AV_OPT_TYPE_INT, { .i64 = -2 }, -2, INT_MAX, A | D, "subsong"},
{ "all", "all", 0, AV_OPT_TYPE_CONST, { .i64 = -1}, 0, 0, A | D, "subsong" },
{ "auto", "auto", 0, AV_OPT_TYPE_CONST, { .i64 = -2}, 0, 0, A | D, "subsong" },
{ NULL }
};
static void openmpt_logfunc(const char *message, void *userdata)
{
int level = AV_LOG_INFO;
if (strstr(message, "ERROR") != NULL) {
level = AV_LOG_ERROR;
}
av_log(userdata, level, "%s\n", message);
}
#define add_meta(s, name, meta) \
do { \
const char *value = meta; \
if (value && value[0]) \
av_dict_set(&s->metadata, name, value, 0); \
openmpt_free_string(value); \
} while(0)
static int read_header_openmpt(AVFormatContext *s)
{
AVStream *st;
OpenMPTContext *openmpt = s->priv_data;
int64_t size = avio_size(s->pb);
if (!size)
return AVERROR_INVALIDDATA;
char *buf = av_malloc(size);
int ret;
if (!buf)
return AVERROR(ENOMEM);
size = avio_read(s->pb, buf, size);
if (size < 0) {
av_log(s, AV_LOG_ERROR, "Reading input buffer failed.\n");
av_freep(&buf);
return size;
}
openmpt->module = openmpt_module_create_from_memory(buf, size, openmpt_logfunc, s, NULL);
av_freep(&buf);
if (!openmpt->module)
return AVERROR_INVALIDDATA;
openmpt->channels = av_get_channel_layout_nb_channels(openmpt->layout);
openmpt->duration = openmpt_module_get_duration_seconds(openmpt->module);
add_meta(s, "artist", openmpt_module_get_metadata(openmpt->module, "artist"));
add_meta(s, "title", openmpt_module_get_metadata(openmpt->module, "title"));
add_meta(s, "encoder", openmpt_module_get_metadata(openmpt->module, "tracker"));
add_meta(s, "comment", openmpt_module_get_metadata(openmpt->module, "message"));
add_meta(s, "date", openmpt_module_get_metadata(openmpt->module, "date"));
if (openmpt->subsong >= openmpt_module_get_num_subsongs(openmpt->module)) {
openmpt_module_destroy(openmpt->module);
av_log(s, AV_LOG_ERROR, "Invalid subsong index: %d\n", openmpt->subsong);
return AVERROR(EINVAL);
}
if (openmpt->subsong != -2) {
if (openmpt->subsong >= 0) {
av_dict_set_int(&s->metadata, "track", openmpt->subsong + 1, 0);
}
ret = openmpt_module_select_subsong(openmpt->module, openmpt->subsong);
if (!ret){
openmpt_module_destroy(openmpt->module);
av_log(s, AV_LOG_ERROR, "Could not select requested subsong: %d", openmpt->subsong);
return AVERROR(EINVAL);
}
}
st = avformat_new_stream(s, NULL);
if (!st) {
openmpt_module_destroy(openmpt->module);
openmpt->module = NULL;
return AVERROR(ENOMEM);
}
avpriv_set_pts_info(st, 64, 1, AV_TIME_BASE);
st->duration = llrint(openmpt->duration*AV_TIME_BASE);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_NE(AV_CODEC_ID_PCM_F32BE, AV_CODEC_ID_PCM_F32LE);
st->codecpar->channels = openmpt->channels;
st->codecpar->sample_rate = openmpt->sample_rate;
return 0;
}
#define AUDIO_PKT_SIZE 2048
static int read_packet_openmpt(AVFormatContext *s, AVPacket *pkt)
{
OpenMPTContext *openmpt = s->priv_data;
int n_samples = AUDIO_PKT_SIZE / (openmpt->channels ? openmpt->channels*4 : 4);
int ret;
if ((ret = av_new_packet(pkt, AUDIO_PKT_SIZE)) < 0)
return ret;
switch (openmpt->channels) {
case 1:
ret = openmpt_module_read_float_mono(openmpt->module, openmpt->sample_rate,
n_samples, (float *)pkt->data);
break;
case 2:
ret = openmpt_module_read_interleaved_float_stereo(openmpt->module, openmpt->sample_rate,
n_samples, (float *)pkt->data);
break;
case 4:
ret = openmpt_module_read_interleaved_float_quad(openmpt->module, openmpt->sample_rate,
n_samples, (float *)pkt->data);
break;
default:
av_log(s, AV_LOG_ERROR, "Unsupported number of channels: %d", openmpt->channels);
return AVERROR(EINVAL);
}
if (ret < 1) {
pkt->size = 0;
return AVERROR_EOF;
}
pkt->size = ret * (openmpt->channels * 4);
return 0;
}
static int read_close_openmpt(AVFormatContext *s)
{
OpenMPTContext *openmpt = s->priv_data;
openmpt_module_destroy(openmpt->module);
openmpt->module = NULL;
return 0;
}
static int read_seek_openmpt(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
{
OpenMPTContext *openmpt = s->priv_data;
openmpt_module_set_position_seconds(openmpt->module, (double)ts/AV_TIME_BASE);
return 0;
}
static const AVClass class_openmpt = {
.class_name = "libopenmpt",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_libopenmpt_demuxer = {
.name = "libopenmpt",
.long_name = NULL_IF_CONFIG_SMALL("Tracker formats (libopenmpt)"),
.priv_data_size = sizeof(OpenMPTContext),
.read_header = read_header_openmpt,
.read_packet = read_packet_openmpt,
.read_close = read_close_openmpt,
.read_seek = read_seek_openmpt,
.priv_class = &class_openmpt,
.extensions = "669,amf,ams,dbm,digi,dmf,dsm,far,gdm,imf,it,j2b,m15,mdl,med,mmcmp,mms,mo3,mod,mptm,mt2,mtm,nst,okt,plm,ppm,psm,pt36,ptm,s3m,sfx,sfx2,stk,stm,ult,umx,wow,xm,xpk",
};
|
