1 /*
2 * Tracked MOD demuxer (libopenmpt)
3 * Copyright (c) 2016 Josh de Kock
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <libopenmpt/libopenmpt.h>
23 #include <libopenmpt/libopenmpt_stream_callbacks_file.h>
24 #include <libopenmpt/libopenmpt_version.h>
25 /* Shims to support libopenmpt < 0.3.0 (as documented by libopenmpt) */
26 #if !defined(OPENMPT_API_VERSION_MAKE)
27 #define OPENMPT_API_VERSION_MAKE(major, minor, patch) (((major)<<24)|((minor)<<16)|((patch)<<0))
28 #endif
29 #if !defined(OPENMPT_API_VERSION_AT_LEAST)
30 #define OPENMPT_API_VERSION_AT_LEAST(major, minor, patch) (OPENMPT_API_VERSION >= OPENMPT_API_VERSION_MAKE((major), (minor), (patch)))
31 #endif
32
33 #include "libavutil/avstring.h"
34 #include "libavutil/opt.h"
35 #include "avformat.h"
36 #include "internal.h"
37
38 typedef struct OpenMPTContext {
39 const AVClass *class;
40 openmpt_module *module;
41
42 int channels;
43 double duration;
44 /* options */
45 int sample_rate;
46 int64_t layout;
47 int subsong;
48 } OpenMPTContext;
49
50 #define OFFSET(x) offsetof(OpenMPTContext, x)
51 #define A AV_OPT_FLAG_AUDIO_PARAM
52 #define D AV_OPT_FLAG_DECODING_PARAM
53 static const AVOption options[] = {
54 { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 48000 }, 1000, INT_MAX, A | D },
55 { "layout", "set channel layout", OFFSET(layout), AV_OPT_TYPE_CHANNEL_LAYOUT, { .i64 = AV_CH_LAYOUT_STEREO }, 0, INT64_MAX, A | D },
56 { "subsong", "set subsong", OFFSET(subsong), AV_OPT_TYPE_INT, { .i64 = -2 }, -2, INT_MAX, A | D, "subsong"},
57 { "all", "all", 0, AV_OPT_TYPE_CONST, { .i64 = -1}, 0, 0, A | D, "subsong" },
58 { "auto", "auto", 0, AV_OPT_TYPE_CONST, { .i64 = -2}, 0, 0, A | D, "subsong" },
59 { NULL }
60 };
61
openmpt_logfunc(const char * message,void * userdata)62 static void openmpt_logfunc(const char *message, void *userdata)
63 {
64 int level = AV_LOG_INFO;
65 if (strstr(message, "ERROR") != NULL) {
66 level = AV_LOG_ERROR;
67 }
68 av_log(userdata, level, "%s\n", message);
69 }
70
71 #define add_meta(s, name, meta) \
72 do { \
73 const char *value = meta; \
74 if (value && value[0]) \
75 av_dict_set(&s->metadata, name, value, 0); \
76 openmpt_free_string(value); \
77 } while(0)
78
read_header_openmpt(AVFormatContext * s)79 static int read_header_openmpt(AVFormatContext *s)
80 {
81 AVStream *st;
82 OpenMPTContext *openmpt = s->priv_data;
83 int64_t size;
84 char *buf;
85 #if OPENMPT_API_VERSION_AT_LEAST(0,3,0)
86 int error;
87 #endif
88 int ret;
89
90 size = avio_size(s->pb);
91 if (size <= 0)
92 return AVERROR_INVALIDDATA;
93 buf = av_malloc(size);
94 if (!buf)
95 return AVERROR(ENOMEM);
96 size = avio_read(s->pb, buf, size);
97 if (size < 0) {
98 av_log(s, AV_LOG_ERROR, "Reading input buffer failed.\n");
99 av_freep(&buf);
100 return size;
101 }
102
103 #if OPENMPT_API_VERSION_AT_LEAST(0,3,0)
104 error = OPENMPT_ERROR_OK;
105 openmpt->module = openmpt_module_create_from_memory2(buf, size, openmpt_logfunc, s, NULL, NULL, &error, NULL, NULL);
106 av_freep(&buf);
107 if (!openmpt->module) {
108 if (error == OPENMPT_ERROR_OUT_OF_MEMORY)
109 return AVERROR(ENOMEM);
110 else if (error >= OPENMPT_ERROR_GENERAL)
111 return AVERROR_INVALIDDATA;
112 else
113 return AVERROR_UNKNOWN;
114 }
115 #else
116 openmpt->module = openmpt_module_create_from_memory(buf, size, openmpt_logfunc, s, NULL);
117 av_freep(&buf);
118 if (!openmpt->module)
119 return AVERROR_INVALIDDATA;
120 #endif
121
122 openmpt->channels = av_get_channel_layout_nb_channels(openmpt->layout);
123
124 if (openmpt->subsong >= openmpt_module_get_num_subsongs(openmpt->module)) {
125 openmpt_module_destroy(openmpt->module);
126 av_log(s, AV_LOG_ERROR, "Invalid subsong index: %d\n", openmpt->subsong);
127 return AVERROR(EINVAL);
128 }
129
130 if (openmpt->subsong != -2) {
131 if (openmpt->subsong >= 0) {
132 av_dict_set_int(&s->metadata, "track", openmpt->subsong + 1, 0);
133 }
134 ret = openmpt_module_select_subsong(openmpt->module, openmpt->subsong);
135 if (!ret){
136 openmpt_module_destroy(openmpt->module);
137 av_log(s, AV_LOG_ERROR, "Could not select requested subsong: %d", openmpt->subsong);
138 return AVERROR(EINVAL);
139 }
140 }
141
142 openmpt->duration = openmpt_module_get_duration_seconds(openmpt->module);
143
144 add_meta(s, "artist", openmpt_module_get_metadata(openmpt->module, "artist"));
145 add_meta(s, "title", openmpt_module_get_metadata(openmpt->module, "title"));
146 add_meta(s, "encoder", openmpt_module_get_metadata(openmpt->module, "tracker"));
147 add_meta(s, "comment", openmpt_module_get_metadata(openmpt->module, "message"));
148 add_meta(s, "date", openmpt_module_get_metadata(openmpt->module, "date"));
149
150 st = avformat_new_stream(s, NULL);
151 if (!st) {
152 openmpt_module_destroy(openmpt->module);
153 openmpt->module = NULL;
154 return AVERROR(ENOMEM);
155 }
156 avpriv_set_pts_info(st, 64, 1, AV_TIME_BASE);
157 st->duration = llrint(openmpt->duration*AV_TIME_BASE);
158
159 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
160 st->codecpar->codec_id = AV_NE(AV_CODEC_ID_PCM_F32BE, AV_CODEC_ID_PCM_F32LE);
161 st->codecpar->channels = openmpt->channels;
162 st->codecpar->sample_rate = openmpt->sample_rate;
163
164 return 0;
165 }
166
167 #define AUDIO_PKT_SIZE 2048
168
read_packet_openmpt(AVFormatContext * s,AVPacket * pkt)169 static int read_packet_openmpt(AVFormatContext *s, AVPacket *pkt)
170 {
171 OpenMPTContext *openmpt = s->priv_data;
172 int n_samples = AUDIO_PKT_SIZE / (openmpt->channels ? openmpt->channels*4 : 4);
173 int ret;
174
175 if ((ret = av_new_packet(pkt, AUDIO_PKT_SIZE)) < 0)
176 return ret;
177
178 switch (openmpt->channels) {
179 case 1:
180 ret = openmpt_module_read_float_mono(openmpt->module, openmpt->sample_rate,
181 n_samples, (float *)pkt->data);
182 break;
183 case 2:
184 ret = openmpt_module_read_interleaved_float_stereo(openmpt->module, openmpt->sample_rate,
185 n_samples, (float *)pkt->data);
186 break;
187 case 4:
188 ret = openmpt_module_read_interleaved_float_quad(openmpt->module, openmpt->sample_rate,
189 n_samples, (float *)pkt->data);
190 break;
191 default:
192 av_log(s, AV_LOG_ERROR, "Unsupported number of channels: %d", openmpt->channels);
193 return AVERROR(EINVAL);
194 }
195
196 if (ret < 1) {
197 pkt->size = 0;
198 return AVERROR_EOF;
199 }
200
201 pkt->size = ret * (openmpt->channels * 4);
202
203 return 0;
204 }
205
read_close_openmpt(AVFormatContext * s)206 static int read_close_openmpt(AVFormatContext *s)
207 {
208 OpenMPTContext *openmpt = s->priv_data;
209 openmpt_module_destroy(openmpt->module);
210 openmpt->module = NULL;
211 return 0;
212 }
213
read_seek_openmpt(AVFormatContext * s,int stream_idx,int64_t ts,int flags)214 static int read_seek_openmpt(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
215 {
216 OpenMPTContext *openmpt = s->priv_data;
217 openmpt_module_set_position_seconds(openmpt->module, (double)ts/AV_TIME_BASE);
218 return 0;
219 }
220
probe_openmpt_extension(const AVProbeData * p)221 static int probe_openmpt_extension(const AVProbeData *p)
222 {
223 const char *ext;
224 if (p->filename) {
225 ext = strrchr(p->filename, '.');
226 if (ext && strlen(ext + 1) > 0) {
227 ext++; /* skip '.' */
228 if (openmpt_is_extension_supported(ext) == 1)
229 return AVPROBE_SCORE_EXTENSION;
230 }
231 }
232 return 0;
233 }
234
read_probe_openmpt(const AVProbeData * p)235 static int read_probe_openmpt(const AVProbeData *p)
236 {
237 #if OPENMPT_API_VERSION_AT_LEAST(0,3,0)
238 int probe_result;
239 if (p->buf && p->buf_size > 0) {
240 probe_result = openmpt_probe_file_header_without_filesize(
241 OPENMPT_PROBE_FILE_HEADER_FLAGS_DEFAULT,
242 p->buf, p->buf_size,
243 &openmpt_logfunc, NULL, NULL, NULL, NULL, NULL);
244 if (probe_result == OPENMPT_PROBE_FILE_HEADER_RESULT_SUCCESS) {
245 /* As probing here relies on code external to FFmpeg, do not return
246 * AVPROBE_SCORE_MAX in order to reduce the impact in the rare
247 * cases of false positives.
248 */
249 return AVPROBE_SCORE_MIME + 1;
250 } else if (probe_result == OPENMPT_PROBE_FILE_HEADER_RESULT_WANTMOREDATA) {
251 if (probe_openmpt_extension(p) > 0) {
252 return AVPROBE_SCORE_RETRY;
253 } else {
254 if (p->buf_size >= openmpt_probe_file_header_get_recommended_size()) {
255 /* We have already received the recommended amount of data
256 * and still cannot decide. Return a rather low score.
257 */
258 return AVPROBE_SCORE_RETRY / 2;
259 } else {
260 /* The file extension is unknown and we have very few data
261 * bytes available. libopenmpt cannot decide anything here,
262 * and returning any score > 0 would result in successful
263 * probing of random data.
264 */
265 return 0;
266 }
267 }
268 } else if (probe_result == OPENMPT_PROBE_FILE_HEADER_RESULT_FAILURE) {
269 return 0;
270 }
271 }
272 #endif
273 /* for older libopenmpt, fall back to file extension probing */
274 return probe_openmpt_extension(p);
275 }
276
277 static const AVClass class_openmpt = {
278 .class_name = "libopenmpt",
279 .item_name = av_default_item_name,
280 .option = options,
281 .version = LIBAVUTIL_VERSION_INT,
282 };
283
284 AVInputFormat ff_libopenmpt_demuxer = {
285 .name = "libopenmpt",
286 .long_name = NULL_IF_CONFIG_SMALL("Tracker formats (libopenmpt)"),
287 .priv_data_size = sizeof(OpenMPTContext),
288 .read_probe = read_probe_openmpt,
289 .read_header = read_header_openmpt,
290 .read_packet = read_packet_openmpt,
291 .read_close = read_close_openmpt,
292 .read_seek = read_seek_openmpt,
293 .priv_class = &class_openmpt,
294 #if OPENMPT_API_VERSION_AT_LEAST(0,3,0)
295 .extensions = "669,amf,ams,dbm,digi,dmf,dsm,dtm,far,gdm,ice,imf,it,j2b,m15,mdl,med,mmcmp,mms,mo3,mod,mptm,mt2,mtm,nst,okt,plm,ppm,psm,pt36,ptm,s3m,sfx,sfx2,st26,stk,stm,stp,ult,umx,wow,xm,xpk",
296 #else
297 .extensions = "669,amf,ams,dbm,digi,dmf,dsm,far,gdm,ice,imf,it,j2b,m15,mdl,med,mmcmp,mms,mo3,mod,mptm,mt2,mtm,nst,okt,plm,ppm,psm,pt36,ptm,s3m,sfx,sfx2,st26,stk,stm,ult,umx,wow,xm,xpk",
298 #endif
299 };
300