2 * Tracked MOD demuxer (libopenmpt)
3 * Copyright (c) 2016 Josh de Kock
5 * This file is part of FFmpeg.
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.
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.
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
22 #include <libopenmpt/libopenmpt.h>
23 #include <libopenmpt/libopenmpt_stream_callbacks_file.h>
25 #include "libavutil/avstring.h"
26 #include "libavutil/opt.h"
30 typedef struct OpenMPTContext {
32 openmpt_module *module;
42 #define OFFSET(x) offsetof(OpenMPTContext, x)
43 #define A AV_OPT_FLAG_AUDIO_PARAM
44 #define D AV_OPT_FLAG_DECODING_PARAM
45 static const AVOption options[] = {
46 { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 48000 }, 1000, INT_MAX, A | D },
47 { "layout", "set channel layout", OFFSET(layout), AV_OPT_TYPE_CHANNEL_LAYOUT, { .i64 = AV_CH_LAYOUT_STEREO }, 0, INT64_MAX, A | D },
48 { "subsong", "set subsong", OFFSET(subsong), AV_OPT_TYPE_INT, { .i64 = -2 }, -2, INT_MAX, A | D, "subsong"},
49 { "all", "all", 0, AV_OPT_TYPE_CONST, { .i64 = -1}, 0, 0, A | D, "subsong" },
50 { "auto", "auto", 0, AV_OPT_TYPE_CONST, { .i64 = -2}, 0, 0, A | D, "subsong" },
54 static void openmpt_logfunc(const char *message, void *userdata)
56 int level = AV_LOG_INFO;
57 if (strstr(message, "ERROR") != NULL) {
60 av_log(userdata, level, "%s\n", message);
63 #define add_meta(s, name, meta) \
65 const char *value = meta; \
66 if (value && value[0]) \
67 av_dict_set(&s->metadata, name, value, 0); \
68 openmpt_free_string(value); \
71 static int read_header_openmpt(AVFormatContext *s)
74 OpenMPTContext *openmpt = s->priv_data;
75 int64_t size = avio_size(s->pb);
76 char *buf = av_malloc(size);
81 return AVERROR(ENOMEM);
82 size = avio_read(s->pb, buf, size);
84 openmpt->module = openmpt_module_create_from_memory(buf, size, openmpt_logfunc, s, NULL);
87 return AVERROR_INVALIDDATA;
89 openmpt->channels = av_get_channel_layout_nb_channels(openmpt->layout);
90 openmpt->duration = openmpt_module_get_duration_seconds(openmpt->module);
92 add_meta(s, "artist", openmpt_module_get_metadata(openmpt->module, "artist"));
93 add_meta(s, "title", openmpt_module_get_metadata(openmpt->module, "title"));
94 add_meta(s, "encoder", openmpt_module_get_metadata(openmpt->module, "tracker"));
95 add_meta(s, "comment", openmpt_module_get_metadata(openmpt->module, "message"));
97 if (openmpt->subsong >= openmpt_module_get_num_subsongs(openmpt->module)) {
98 openmpt_module_destroy(openmpt->module);
99 av_log(s, AV_LOG_ERROR, "Invalid subsong index: %d\n", openmpt->subsong);
100 return AVERROR(EINVAL);
103 if (openmpt->subsong != -2) {
104 if (openmpt->subsong >= 0) {
105 av_dict_set_int(&s->metadata, "track", openmpt->subsong + 1, 0);
107 ret = openmpt_module_select_subsong(openmpt->module, openmpt->subsong);
109 openmpt_module_destroy(openmpt->module);
110 av_log(s, AV_LOG_ERROR, "Could not select requested subsong: %d", openmpt->subsong);
111 return AVERROR(EINVAL);
115 st = avformat_new_stream(s, NULL);
117 openmpt_module_destroy(openmpt->module);
118 openmpt->module = NULL;
119 return AVERROR(ENOMEM);
121 avpriv_set_pts_info(st, 64, 1, 1000);
122 if (st->duration > 0)
123 st->duration = llrint(openmpt->duration*AV_TIME_BASE);
125 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
126 st->codecpar->codec_id = AV_NE(AV_CODEC_ID_PCM_F32BE, AV_CODEC_ID_PCM_F32LE);
127 st->codecpar->channels = openmpt->channels;
128 st->codecpar->sample_rate = openmpt->sample_rate;
133 #define AUDIO_PKT_SIZE 2048
135 static int read_packet_openmpt(AVFormatContext *s, AVPacket *pkt)
137 OpenMPTContext *openmpt = s->priv_data;
138 int n_samples = AUDIO_PKT_SIZE / (openmpt->channels ? openmpt->channels*4 : 4);
141 if ((ret = av_new_packet(pkt, AUDIO_PKT_SIZE)) < 0)
144 switch (openmpt->channels) {
146 ret = openmpt_module_read_float_mono(openmpt->module, openmpt->sample_rate,
147 n_samples, (float *)pkt->data);
150 ret = openmpt_module_read_interleaved_float_stereo(openmpt->module, openmpt->sample_rate,
151 n_samples, (float *)pkt->data);
154 ret = openmpt_module_read_interleaved_float_quad(openmpt->module, openmpt->sample_rate,
155 n_samples, (float *)pkt->data);
158 av_log(s, AV_LOG_ERROR, "Unsupported number of channels: %d", openmpt->channels);
159 return AVERROR(EINVAL);
167 pkt->size = ret * (openmpt->channels * 4);
172 static int read_close_openmpt(AVFormatContext *s)
174 OpenMPTContext *openmpt = s->priv_data;
175 openmpt_module_destroy(openmpt->module);
176 openmpt->module = NULL;
180 static int read_seek_openmpt(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
182 OpenMPTContext *openmpt = s->priv_data;
183 openmpt_module_set_position_seconds(openmpt->module, (double)ts/AV_TIME_BASE);
187 static const AVClass class_openmpt = {
188 .class_name = "libopenmpt",
189 .item_name = av_default_item_name,
191 .version = LIBAVUTIL_VERSION_INT,
194 AVInputFormat ff_libopenmpt_demuxer = {
195 .name = "libopenmpt",
196 .long_name = NULL_IF_CONFIG_SMALL("Tracker formats (libopenmpt)"),
197 .priv_data_size = sizeof(OpenMPTContext),
198 .read_header = read_header_openmpt,
199 .read_packet = read_packet_openmpt,
200 .read_close = read_close_openmpt,
201 .read_seek = read_seek_openmpt,
202 .priv_class = &class_openmpt,
203 .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",