FFmpeg: libavformat/libmodplug.c Source File

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libavformat

libmodplug.c

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1 /*

2 * This file is part of FFmpeg.

3 *

4 * FFmpeg is free software; you can redistribute it and/or

5 * modify it under the terms of the GNU Lesser General Public

6 * License as published by the Free Software Foundation; either

7 * version 2.1 of the License, or (at your option) any later version.

8 *

9 * FFmpeg is distributed in the hope that it will be useful,

10 * but WITHOUT ANY WARRANTY; without even the implied warranty of

11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

12 * Lesser General Public License for more details.

13 *

14 * You should have received a copy of the GNU Lesser General Public

15 * License along with FFmpeg; if not, write to the Free Software

16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

17 */

19 /**

20 * @file

21 * ModPlug demuxer

22 * @todo better probing than extensions matching

23 */

25 #define MODPLUG_STATIC

26 #include <libmodplug/modplug.h>

27 #include "libavutil/avstring.h"

28 #include "libavutil/eval.h"

29 #include "libavutil/opt.h"

30 #include "avformat.h"

31 #include "internal.h"

33 typedef struct ModPlugContext {

34 const AVClass *class;

35 ModPlugFile *f;

36 uint8_t *buf; ///< input file content

38 /* options */

39 int noise_reduction;

40 int reverb_depth;

41 int reverb_delay;

42 int bass_amount;

43 int bass_range;

44 int surround_depth;

45 int surround_delay;

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

49 /* optional video stream */

50 double ts_per_packet; ///< used to define the pts/dts using packet_count;

51 int packet_count; ///< total number of audio packets

52 int print_textinfo; ///< bool flag for printing speed, tempo, order, ...

53 int video_stream; ///< 1 if the user want a video stream, otherwise 0

54 int w; ///< video stream width in char (one char = 8x8px)

55 int h; ///< video stream height in char (one char = 8x8px)

56 int video_switch; ///< 1 if current packet is video, otherwise 0

57 int fsize; ///< constant frame size

58 int linesize; ///< line size in bytes

59 char *color_eval; ///< color eval user input expression

60 AVExpr *expr; ///< parsed color eval expression

61 } ModPlugContext;

63 static const char * const var_names[] = {

64 "x", "y",

65 "w", "h",

66 "t",

67 "speed", "tempo", "order", "pattern", "row",

68 NULL

69 };

71 enum var_name {

72 VAR_X, VAR_Y,

73 VAR_W, VAR_H,

74 VAR_TIME,

75 VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW,

76 VAR_VARS_NB

77 };

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

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

82 #define OFFSET(x) offsetof(ModPlugContext, x)

83 #define D AV_OPT_FLAG_DECODING_PARAM

84 static const AVOption options[] = {

85 {"noise_reduction", "Enable noise reduction 0(off)-1(on)", OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D},

86 {"reverb_depth", "Reverb level 0(quiet)-100(loud)", OFFSET(reverb_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},

87 {"reverb_delay", "Reverb delay in ms, usually 40-200ms", OFFSET(reverb_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},

88 {"bass_amount", "XBass level 0(quiet)-100(loud)", OFFSET(bass_amount), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},

89 {"bass_range", "XBass cutoff in Hz 10-100", OFFSET(bass_range), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},

90 {"surround_depth", "Surround level 0(quiet)-100(heavy)", OFFSET(surround_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},

91 {"surround_delay", "Surround delay in ms, usually 5-40ms", OFFSET(surround_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},

92 {"max_size", "Max file size supported (in bytes). Default is 5MB. Set to 0 for no limit (not recommended)",

93 OFFSET(max_size), AV_OPT_TYPE_INT, {.i64 = FF_MODPLUG_DEF_FILE_SIZE}, 0, FF_MODPLUG_MAX_FILE_SIZE, D},

94 {"video_stream_expr", "Color formula", OFFSET(color_eval), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D},

95 {"video_stream", "Make demuxer output a video stream", OFFSET(video_stream), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D},

96 {"video_stream_w", "Video stream width in char (one char = 8x8px)", OFFSET(w), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},

97 {"video_stream_h", "Video stream height in char (one char = 8x8px)", OFFSET(h), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},

98 {"video_stream_ptxt", "Print speed, tempo, order, ... in video stream", OFFSET(print_textinfo), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, D},

99 {NULL},

100 };

101

102 #define SET_OPT_IF_REQUESTED(libopt, opt, flag) do { \

103 if (modplug->opt) { \

104 settings.libopt = modplug->opt; \

105 settings.mFlags |= flag; \

106 } \

107 } while (0)

108

109 #define ADD_META_MULTIPLE_ENTRIES(entry_name, fname) do { \

110 if (n_## entry_name ##s) { \

111 unsigned i, n = 0; \

112 \

113 for (i = 0; i < n_## entry_name ##s; i++) { \

114 char item_name[64] = {0}; \

115 fname(f, i, item_name); \

116 if (!*item_name) \

117 continue; \

118 if (n) \

119 av_dict_set(&s->metadata, #entry_name, "\n", AV_DICT_APPEND); \

120 av_dict_set(&s->metadata, #entry_name, item_name, AV_DICT_APPEND); \

121 n++; \

122 } \

123 \

124 extra = av_asprintf(", %u/%u " #entry_name "%s", \

125 n, n_## entry_name ##s, n > 1 ? "s" : ""); \

126 if (!extra) \

127 return AVERROR(ENOMEM); \

128 av_dict_set(&s->metadata, "extra info", extra, AV_DICT_APPEND); \

129 av_free(extra); \

130 } \

131 } while (0)

132

133 static int modplug_load_metadata(AVFormatContext *s)

134 {

135 ModPlugContext *modplug = s->priv_data;

136 ModPlugFile *f = modplug->f;

137 char *extra;

138 const char *name = ModPlug_GetName(f);

139 const char *msg = ModPlug_GetMessage(f);

140

141 unsigned n_instruments = ModPlug_NumInstruments(f);

142 unsigned n_samples = ModPlug_NumSamples(f);

143 unsigned n_patterns = ModPlug_NumPatterns(f);

144 unsigned n_channels = ModPlug_NumChannels(f);

145

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

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

148

149 extra = av_asprintf("%u pattern%s, %u channel%s",

150 n_patterns, n_patterns > 1 ? "s" : "",

151 n_channels, n_channels > 1 ? "s" : "");

152 if (!extra)

153 return AVERROR(ENOMEM);

154 av_dict_set(&s->metadata, "extra info", extra, AV_DICT_DONT_STRDUP_VAL);

155

156 ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName);

157 ADD_META_MULTIPLE_ENTRIES(sample, ModPlug_SampleName);

158

159 return 0;

160 }

161

162 #define AUDIO_PKT_SIZE 512

163

164 static int modplug_read_header(AVFormatContext *s)

165 {

166 AVStream *st;

167 AVIOContext *pb = s->pb;

168 ModPlug_Settings settings;

169 ModPlugContext *modplug = s->priv_data;

170 int64_t sz = avio_size(pb);

171

172 if (sz < 0) {

173 av_log(s, AV_LOG_WARNING, "Could not determine file size\n");

174 sz = modplug->max_size;

175 } else if (modplug->max_size && sz > modplug->max_size) {

176 sz = modplug->max_size;

177 av_log(s, AV_LOG_WARNING, "Max file size reach%s, allocating %"PRIi64"B "

178 "but demuxing is likely to fail due to incomplete buffer\n",

179 sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz);

180 }

181

182 if (modplug->color_eval) {

183 int r = av_expr_parse(&modplug->expr, modplug->color_eval, var_names,

184 NULL, NULL, NULL, NULL, 0, s);

185 if (r < 0)

186 return r;

187 }

188

189 modplug->buf = av_malloc(modplug->max_size);

190 if (!modplug->buf)

191 return AVERROR(ENOMEM);

192 sz = avio_read(pb, modplug->buf, sz);

193

194 ModPlug_GetSettings(&settings);

195 settings.mChannels = 2;

196 settings.mBits = 16;

197 settings.mFrequency = 44100;

198 settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality

199 settings.mLoopCount = 0; // prevents looping forever

200

201 if (modplug->noise_reduction) settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION;

202 SET_OPT_IF_REQUESTED(mReverbDepth, reverb_depth, MODPLUG_ENABLE_REVERB);

203 SET_OPT_IF_REQUESTED(mReverbDelay, reverb_delay, MODPLUG_ENABLE_REVERB);

204 SET_OPT_IF_REQUESTED(mBassAmount, bass_amount, MODPLUG_ENABLE_MEGABASS);

205 SET_OPT_IF_REQUESTED(mBassRange, bass_range, MODPLUG_ENABLE_MEGABASS);

206 SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND);

207 SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND);

208

209 if (modplug->reverb_depth) settings.mReverbDepth = modplug->reverb_depth;

210 if (modplug->reverb_delay) settings.mReverbDelay = modplug->reverb_delay;

211 if (modplug->bass_amount) settings.mBassAmount = modplug->bass_amount;

212 if (modplug->bass_range) settings.mBassRange = modplug->bass_range;

213 if (modplug->surround_depth) settings.mSurroundDepth = modplug->surround_depth;

214 if (modplug->surround_delay) settings.mSurroundDelay = modplug->surround_delay;

215

216 ModPlug_SetSettings(&settings);

217

218 modplug->f = ModPlug_Load(modplug->buf, sz);

219 if (!modplug->f)

220 return AVERROR_INVALIDDATA;

221

222 st = avformat_new_stream(s, NULL);

223 if (!st)

224 return AVERROR(ENOMEM);

225 avpriv_set_pts_info(st, 64, 1, 1000);

226 st->duration = ModPlug_GetLength(modplug->f);

227 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

228 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;

229 st->codec->channels = settings.mChannels;

230 st->codec->sample_rate = settings.mFrequency;

231

232 // timebase = 1/1000, 2ch 16bits 44.1kHz-> 2*2*44100

233 modplug->ts_per_packet = 1000*AUDIO_PKT_SIZE / (4*44100.);

234

235 if (modplug->video_stream) {

236 AVStream *vst = avformat_new_stream(s, NULL);

237 if (!vst)

238 return AVERROR(ENOMEM);

239 avpriv_set_pts_info(vst, 64, 1, 1000);

240 vst->duration = st->duration;

241 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;

242 vst->codec->codec_id = AV_CODEC_ID_XBIN;

243 vst->codec->width = modplug->w << 3;

244 vst->codec->height = modplug->h << 3;

245 modplug->linesize = modplug->w * 3;

246 modplug->fsize = modplug->linesize * modplug->h;

247 }

248

249 return modplug_load_metadata(s);

250 }

251

252 static void write_text(uint8_t *dst, const char *s, int linesize, int x, int y)

253 {

254 int i;

255 dst += y*linesize + x*3;

256 for (i = 0; s[i]; i++, dst += 3) {

257 dst[0] = 0x0; // count - 1

258 dst[1] = s[i]; // char

259 dst[2] = 0x0f; // background / foreground

260 }

261 }

262

263 #define PRINT_INFO(line, name, idvalue) do { \

264 snprintf(intbuf, sizeof(intbuf), "%.0f", var_values[idvalue]); \

265 write_text(pkt->data, name ":", modplug->linesize, 0+1, line+1); \

266 write_text(pkt->data, intbuf, modplug->linesize, 10+1, line+1); \

267 } while (0)

268

269 static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)

270 {

271 ModPlugContext *modplug = s->priv_data;

272

273 if (modplug->video_stream) {

274 modplug->video_switch ^= 1; // one video packet for one audio packet

275 if (modplug->video_switch) {

276 double var_values[VAR_VARS_NB];

277

278 var_values[VAR_W ] = modplug->w;

279 var_values[VAR_H ] = modplug->h;

280 var_values[VAR_TIME ] = modplug->packet_count * modplug->ts_per_packet;

281 var_values[VAR_SPEED ] = ModPlug_GetCurrentSpeed (modplug->f);

282 var_values[VAR_TEMPO ] = ModPlug_GetCurrentTempo (modplug->f);

283 var_values[VAR_ORDER ] = ModPlug_GetCurrentOrder (modplug->f);

284 var_values[VAR_PATTERN] = ModPlug_GetCurrentPattern(modplug->f);

285 var_values[VAR_ROW ] = ModPlug_GetCurrentRow (modplug->f);

286

287 if (av_new_packet(pkt, modplug->fsize) < 0)

288 return AVERROR(ENOMEM);

289 pkt->stream_index = 1;

290 memset(pkt->data, 0, modplug->fsize);

291

292 if (modplug->print_textinfo) {

293 char intbuf[32];

294 PRINT_INFO(0, "speed", VAR_SPEED);

295 PRINT_INFO(1, "tempo", VAR_TEMPO);

296 PRINT_INFO(2, "order", VAR_ORDER);

297 PRINT_INFO(3, "pattern", VAR_PATTERN);

298 PRINT_INFO(4, "row", VAR_ROW);

299 PRINT_INFO(5, "ts", VAR_TIME);

300 }

301

302 if (modplug->expr) {

303 int x, y;

304 for (y = 0; y < modplug->h; y++) {

305 for (x = 0; x < modplug->w; x++) {

306 double color;

307 var_values[VAR_X] = x;

308 var_values[VAR_Y] = y;

309 color = av_expr_eval(modplug->expr, var_values, NULL);

310 pkt->data[y*modplug->linesize + x*3 + 2] |= av_clip((int)color, 0, 0xf)<<4;

311 }

312 }

313 }

314 pkt->pts = pkt->dts = var_values[VAR_TIME];

315 pkt->flags |= AV_PKT_FLAG_KEY;

316 return 0;

317 }

318 }

319

320 if (av_new_packet(pkt, AUDIO_PKT_SIZE) < 0)

321 return AVERROR(ENOMEM);

322

323 if (modplug->video_stream)

324 pkt->pts = pkt->dts = modplug->packet_count++ * modplug->ts_per_packet;

325

326 pkt->size = ModPlug_Read(modplug->f, pkt->data, AUDIO_PKT_SIZE);

327 if (pkt->size <= 0) {

328 av_free_packet(pkt);

329 return pkt->size == 0 ? AVERROR_EOF : AVERROR(EIO);

330 }

331 return 0;

332 }

333

334 static int modplug_read_close(AVFormatContext *s)

335 {

336 ModPlugContext *modplug = s->priv_data;

337 ModPlug_Unload(modplug->f);

338 av_freep(&modplug->buf);

339 return 0;

340 }

341

342 static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)

343 {

344 ModPlugContext *modplug = s->priv_data;

345 ModPlug_Seek(modplug->f, (int)ts);

346 if (modplug->video_stream)

347 modplug->packet_count = ts / modplug->ts_per_packet;

348 return 0;

349 }

350

351 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";

352

353 static int modplug_probe(AVProbeData *p)

354 {

355 if (av_match_ext(p->filename, modplug_extensions)) {

356 if (p->buf_size < 16384)

357 return AVPROBE_SCORE_EXTENSION/2-1;

358 else

359 return AVPROBE_SCORE_EXTENSION;

360 }

361 return 0;

362 }

363

364 static const AVClass modplug_class = {

365 .class_name = "ModPlug demuxer",

366 .item_name = av_default_item_name,

367 .option = options,

368 .version = LIBAVUTIL_VERSION_INT,

369 };

370

371 AVInputFormat ff_libmodplug_demuxer = {

372 .name = "libmodplug",

373 .long_name = NULL_IF_CONFIG_SMALL("ModPlug demuxer"),

374 .priv_data_size = sizeof(ModPlugContext),

375 .read_probe = modplug_probe,

376 .read_header = modplug_read_header,

377 .read_packet = modplug_read_packet,

378 .read_close = modplug_read_close,

379 .read_seek = modplug_read_seek,

380 .extensions = modplug_extensions,

381 .priv_class = &modplug_class,

382 };

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