summaryrefslogtreecommitdiff
path: root/libavformat/libmodplug.c
blob: 75699e89b473e551d59f91c1080e4934db007c94 (plain)
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
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
/*
 * 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
 */

/**
* @file
* ModPlug demuxer
* @todo better probing than extensions matching
*/

#define MODPLUG_STATIC
#include <libmodplug/modplug.h>
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"

typedef struct ModPlugContext {
    const AVClass *class;
    ModPlugFile *f;
    uint8_t *buf; ///< input file content

    /* options */
    int noise_reduction;
    int reverb_depth;
    int reverb_delay;
    int bass_amount;
    int bass_range;
    int surround_depth;
    int surround_delay;

    int max_size; ///< max file size to allocate

    /* optional video stream */
    double ts_per_packet; ///< used to define the pts/dts using packet_count;
    int packet_count;     ///< total number of audio packets
    int print_textinfo;   ///< bool flag for printing speed, tempo, order, ...
    int video_stream;     ///< 1 if the user want a video stream, otherwise 0
    int w;                ///< video stream width  in char (one char = 8x8px)
    int h;                ///< video stream height in char (one char = 8x8px)
    int video_switch;     ///< 1 if current packet is video, otherwise 0
    int fsize;            ///< constant frame size
    int linesize;         ///< line size in bytes
    char *color_eval;     ///< color eval user input expression
    AVExpr *expr;         ///< parsed color eval expression
} ModPlugContext;

static const char * const var_names[] = {
    "x", "y",
    "w", "h",
    "t",
    "speed", "tempo", "order", "pattern", "row",
    NULL
};

enum var_name {
    VAR_X, VAR_Y,
    VAR_W, VAR_H,
    VAR_TIME,
    VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW,
    VAR_VARS_NB
};

#define FF_MODPLUG_MAX_FILE_SIZE (100 * 1<<20) // 100M
#define FF_MODPLUG_DEF_FILE_SIZE (  5 * 1<<20) //   5M

#define OFFSET(x) offsetof(ModPlugContext, x)
#define D AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
    {"noise_reduction", "Enable noise reduction 0(off)-1(on)",  OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0}, 0,       1, D},
    {"reverb_depth",    "Reverb level 0(quiet)-100(loud)",      OFFSET(reverb_depth),    AV_OPT_TYPE_INT, {.i64 = 0}, 0,     100, D},
    {"reverb_delay",    "Reverb delay in ms, usually 40-200ms", OFFSET(reverb_delay),    AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},
    {"bass_amount",     "XBass level 0(quiet)-100(loud)",       OFFSET(bass_amount),     AV_OPT_TYPE_INT, {.i64 = 0}, 0,     100, D},
    {"bass_range",      "XBass cutoff in Hz 10-100",            OFFSET(bass_range),      AV_OPT_TYPE_INT, {.i64 = 0}, 0,     100, D},
    {"surround_depth",  "Surround level 0(quiet)-100(heavy)",   OFFSET(surround_depth),  AV_OPT_TYPE_INT, {.i64 = 0}, 0,     100, D},
    {"surround_delay",  "Surround delay in ms, usually 5-40ms", OFFSET(surround_delay),  AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},
    {"max_size",        "Max file size supported (in bytes). Default is 5MB. Set to 0 for no limit (not recommended)",
     OFFSET(max_size), AV_OPT_TYPE_INT, {.i64 = FF_MODPLUG_DEF_FILE_SIZE}, 0, FF_MODPLUG_MAX_FILE_SIZE, D},
    {"video_stream_expr", "Color formula",                                  OFFSET(color_eval),     AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D},
    {"video_stream",      "Make demuxer output a video stream",             OFFSET(video_stream),   AV_OPT_TYPE_INT, {.i64 = 0},   0,   1, D},
    {"video_stream_w",    "Video stream width in char (one char = 8x8px)",  OFFSET(w),              AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},
    {"video_stream_h",    "Video stream height in char (one char = 8x8px)", OFFSET(h),              AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},
    {"video_stream_ptxt", "Print speed, tempo, order, ... in video stream", OFFSET(print_textinfo), AV_OPT_TYPE_INT, {.i64 = 1},   0,   1, D},
    {NULL},
};

#define SET_OPT_IF_REQUESTED(libopt, opt, flag) do {        \
    if (modplug->opt) {                                     \
        settings.libopt  = modplug->opt;                    \
        settings.mFlags |= flag;                            \
    }                                                       \
} while (0)

#define ADD_META_MULTIPLE_ENTRIES(entry_name, fname) do {                      \
    if (n_## entry_name ##s) {                                                 \
        unsigned i, n = 0;                                                     \
                                                                               \
        for (i = 0; i < n_## entry_name ##s; i++) {                            \
            char item_name[64] = {0};                                          \
            fname(f, i, item_name);                                            \
            if (!*item_name)                                                   \
                continue;                                                      \
            if (n)                                                             \
                av_dict_set(&s->metadata, #entry_name, "\n", AV_DICT_APPEND);  \
            av_dict_set(&s->metadata, #entry_name, item_name, AV_DICT_APPEND); \
            n++;                                                               \
        }                                                                      \
                                                                               \
        extra = av_asprintf(", %u/%u " #entry_name "%s",                       \
                            n, n_## entry_name ##s, n > 1 ? "s" : "");         \
        if (!extra)                                                            \
            return AVERROR(ENOMEM);                                            \
        av_dict_set(&s->metadata, "extra info", extra, AV_DICT_APPEND);        \
        av_free(extra);                                                        \
    }                                                                          \
} while (0)

static int modplug_load_metadata(AVFormatContext *s)
{
    ModPlugContext *modplug = s->priv_data;
    ModPlugFile *f = modplug->f;
    char *extra;
    const char *name = ModPlug_GetName(f);
    const char *msg  = ModPlug_GetMessage(f);

    unsigned n_instruments = ModPlug_NumInstruments(f);
    unsigned n_samples     = ModPlug_NumSamples(f);
    unsigned n_patterns    = ModPlug_NumPatterns(f);
    unsigned n_channels    = ModPlug_NumChannels(f);

    if (name && *name) av_dict_set(&s->metadata, "name",    name, 0);
    if (msg  && *msg)  av_dict_set(&s->metadata, "message", msg,  0);

    extra = av_asprintf("%u pattern%s, %u channel%s",
                        n_patterns, n_patterns > 1 ? "s" : "",
                        n_channels, n_channels > 1 ? "s" : "");
    if (!extra)
        return AVERROR(ENOMEM);
    av_dict_set(&s->metadata, "extra info", extra, AV_DICT_DONT_STRDUP_VAL);

    ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName);
    ADD_META_MULTIPLE_ENTRIES(sample,     ModPlug_SampleName);

    return 0;
}

#define AUDIO_PKT_SIZE 512

static int modplug_read_header(AVFormatContext *s)
{
    AVStream *st;
    AVIOContext *pb = s->pb;
    ModPlug_Settings settings;
    ModPlugContext *modplug = s->priv_data;
    int64_t sz = avio_size(pb);

    if (sz < 0) {
        av_log(s, AV_LOG_WARNING, "Could not determine file size\n");
        sz = modplug->max_size;
    } else if (modplug->max_size && sz > modplug->max_size) {
        sz = modplug->max_size;
        av_log(s, AV_LOG_WARNING, "Max file size reach%s, allocating %"PRIi64"B "
               "but demuxing is likely to fail due to incomplete buffer\n",
               sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz);
    }

    if (modplug->color_eval) {
        int r = av_expr_parse(&modplug->expr, modplug->color_eval, var_names,
                              NULL, NULL, NULL, NULL, 0, s);
        if (r < 0)
            return r;
    }

    modplug->buf = av_malloc(modplug->max_size);
    if (!modplug->buf)
        return AVERROR(ENOMEM);
    sz = avio_read(pb, modplug->buf, sz);

    ModPlug_GetSettings(&settings);
    settings.mChannels       = 2;
    settings.mBits           = 16;
    settings.mFrequency      = 44100;
    settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality
    settings.mLoopCount      = 0; // prevents looping forever

    if (modplug->noise_reduction) settings.mFlags     |= MODPLUG_ENABLE_NOISE_REDUCTION;
    SET_OPT_IF_REQUESTED(mReverbDepth,   reverb_depth,   MODPLUG_ENABLE_REVERB);
    SET_OPT_IF_REQUESTED(mReverbDelay,   reverb_delay,   MODPLUG_ENABLE_REVERB);
    SET_OPT_IF_REQUESTED(mBassAmount,    bass_amount,    MODPLUG_ENABLE_MEGABASS);
    SET_OPT_IF_REQUESTED(mBassRange,     bass_range,     MODPLUG_ENABLE_MEGABASS);
    SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND);
    SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND);

    if (modplug->reverb_depth)   settings.mReverbDepth   = modplug->reverb_depth;
    if (modplug->reverb_delay)   settings.mReverbDelay   = modplug->reverb_delay;
    if (modplug->bass_amount)    settings.mBassAmount    = modplug->bass_amount;
    if (modplug->bass_range)     settings.mBassRange     = modplug->bass_range;
    if (modplug->surround_depth) settings.mSurroundDepth = modplug->surround_depth;
    if (modplug->surround_delay) settings.mSurroundDelay = modplug->surround_delay;

    ModPlug_SetSettings(&settings);

    modplug->f = ModPlug_Load(modplug->buf, sz);
    if (!modplug->f)
        return AVERROR_INVALIDDATA;

    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);
    avpriv_set_pts_info(st, 64, 1, 1000);
    st->duration = ModPlug_GetLength(modplug->f);
    st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id    = AV_CODEC_ID_PCM_S16LE;
    st->codec->channels    = settings.mChannels;
    st->codec->sample_rate = settings.mFrequency;

    // timebase = 1/1000, 2ch 16bits 44.1kHz-> 2*2*44100
    modplug->ts_per_packet = 1000*AUDIO_PKT_SIZE / (4*44100.);

    if (modplug->video_stream) {
        AVStream *vst = avformat_new_stream(s, NULL);
        if (!vst)
            return AVERROR(ENOMEM);
        avpriv_set_pts_info(vst, 64, 1, 1000);
        vst->duration = st->duration;
        vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
        vst->codec->codec_id   = AV_CODEC_ID_XBIN;
        vst->codec->width      = modplug->w << 3;
        vst->codec->height     = modplug->h << 3;
        modplug->linesize = modplug->w * 3;
        modplug->fsize    = modplug->linesize * modplug->h;
    }

    return modplug_load_metadata(s);
}

static void write_text(uint8_t *dst, const char *s, int linesize, int x, int y)
{
    int i;
    dst += y*linesize + x*3;
    for (i = 0; s[i]; i++, dst += 3) {
        dst[0] = 0x0;   // count - 1
        dst[1] = s[i];  // char
        dst[2] = 0x0f;  // background / foreground
    }
}

#define PRINT_INFO(line, name, idvalue) do {                            \
    snprintf(intbuf, sizeof(intbuf), "%.0f", var_values[idvalue]);      \
    write_text(pkt->data, name ":", modplug->linesize,  0+1, line+1);   \
    write_text(pkt->data, intbuf,   modplug->linesize, 10+1, line+1);   \
} while (0)

static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    ModPlugContext *modplug = s->priv_data;

    if (modplug->video_stream) {
        modplug->video_switch ^= 1; // one video packet for one audio packet
        if (modplug->video_switch) {
            double var_values[VAR_VARS_NB];

            var_values[VAR_W      ] = modplug->w;
            var_values[VAR_H      ] = modplug->h;
            var_values[VAR_TIME   ] = modplug->packet_count * modplug->ts_per_packet;
            var_values[VAR_SPEED  ] = ModPlug_GetCurrentSpeed  (modplug->f);
            var_values[VAR_TEMPO  ] = ModPlug_GetCurrentTempo  (modplug->f);
            var_values[VAR_ORDER  ] = ModPlug_GetCurrentOrder  (modplug->f);
            var_values[VAR_PATTERN] = ModPlug_GetCurrentPattern(modplug->f);
            var_values[VAR_ROW    ] = ModPlug_GetCurrentRow    (modplug->f);

            if (av_new_packet(pkt, modplug->fsize) < 0)
                return AVERROR(ENOMEM);
            pkt->stream_index = 1;
            memset(pkt->data, 0, modplug->fsize);

            if (modplug->print_textinfo) {
                char intbuf[32];
                PRINT_INFO(0, "speed",   VAR_SPEED);
                PRINT_INFO(1, "tempo",   VAR_TEMPO);
                PRINT_INFO(2, "order",   VAR_ORDER);
                PRINT_INFO(3, "pattern", VAR_PATTERN);
                PRINT_INFO(4, "row",     VAR_ROW);
                PRINT_INFO(5, "ts",      VAR_TIME);
            }

            if (modplug->expr) {
                int x, y;
                for (y = 0; y < modplug->h; y++) {
                    for (x = 0; x < modplug->w; x++) {
                        double color;
                        var_values[VAR_X] = x;
                        var_values[VAR_Y] = y;
                        color = av_expr_eval(modplug->expr, var_values, NULL);
                        pkt->data[y*modplug->linesize + x*3 + 2] |= av_clip((int)color, 0, 0xf)<<4;
                    }
                }
            }
            pkt->pts = pkt->dts = var_values[VAR_TIME];
            pkt->flags |= AV_PKT_FLAG_KEY;
            return 0;
        }
    }

    if (av_new_packet(pkt, AUDIO_PKT_SIZE) < 0)
        return AVERROR(ENOMEM);

    if (modplug->video_stream)
        pkt->pts = pkt->dts = modplug->packet_count++ * modplug->ts_per_packet;

    pkt->size = ModPlug_Read(modplug->f, pkt->data, AUDIO_PKT_SIZE);
    if (pkt->size <= 0) {
        av_packet_unref(pkt);
        return pkt->size == 0 ? AVERROR_EOF : AVERROR(EIO);
    }
    return 0;
}

static int modplug_read_close(AVFormatContext *s)
{
    ModPlugContext *modplug = s->priv_data;
    ModPlug_Unload(modplug->f);
    av_freep(&modplug->buf);
    return 0;
}

static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
{
    ModPlugContext *modplug = s->priv_data;
    ModPlug_Seek(modplug->f, (int)ts);
    if (modplug->video_stream)
        modplug->packet_count = ts / modplug->ts_per_packet;
    return 0;
}

static const char modplug_extensions[] = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm,itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz";

static int modplug_probe(AVProbeData *p)
{
    if (av_match_ext(p->filename, modplug_extensions)) {
        if (p->buf_size < 16384)
            return AVPROBE_SCORE_EXTENSION/2-1;
        else
            return AVPROBE_SCORE_EXTENSION;
    }
    return 0;
}

static const AVClass modplug_class = {
    .class_name = "ModPlug demuxer",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

AVInputFormat ff_libmodplug_demuxer = {
    .name           = "libmodplug",
    .long_name      = NULL_IF_CONFIG_SMALL("ModPlug demuxer"),
    .priv_data_size = sizeof(ModPlugContext),
    .read_probe     = modplug_probe,
    .read_header    = modplug_read_header,
    .read_packet    = modplug_read_packet,
    .read_close     = modplug_read_close,
    .read_seek      = modplug_read_seek,
    .extensions     = modplug_extensions,
    .priv_class     = &modplug_class,
};