FFmpeg: libavformat/libmodplug.c Source File

FFmpeg

[フレーム]

libavformat

libmodplug.c

Go to the documentation of this file.

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 #include <libmodplug/modplug.h>

26 #include "libavutil/avstring.h"

27 #include "libavutil/eval.h"

28 #include "libavutil/opt.h"

29 #include "avformat.h"

30 #include "internal.h"

32 typedef struct ModPlugContext {

33 const AVClass *class;

34 ModPlugFile *f;

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

37 /* options */

38 int noise_reduction;

39 int reverb_depth;

40 int reverb_delay;

41 int bass_amount;

42 int bass_range;

43 int surround_depth;

44 int surround_delay;

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

48 /* optional video stream */

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

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

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

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

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

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

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

56 int fsize; ///< constant frame size

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

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

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

60 } ModPlugContext;

62 static const char *var_names[] = {

63 "x", "y",

64 "w", "h",

65 "t",

66 "speed", "tempo", "order", "pattern", "row",

67 NULL

68 };

70 enum var_name {

71 VAR_X, VAR_Y,

72 VAR_W, VAR_H,

73 VAR_TIME,

74 VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW,

75 VAR_VARS_NB

76 };

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

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

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

82 #define D AV_OPT_FLAG_DECODING_PARAM

83 static const AVOption options[] = {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

98 {NULL},

99 };

100

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

102 if (modplug->opt) { \

103 settings.libopt = modplug->opt; \

104 settings.mFlags |= flag; \

105 } \

106 } while (0)

107

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

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

110 unsigned i, n = 0; \

111 \

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

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

114 fname(f, i, item_name); \

115 if (!*item_name) \

116 continue; \

117 if (n) \

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

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

120 n++; \

121 } \

122 \

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

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

125 if (!extra) \

126 return AVERROR(ENOMEM); \

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

128 av_free(extra); \

129 } \

130 } while (0)

131

132 static int modplug_load_metadata(AVFormatContext *s)

133 {

134 ModPlugContext *modplug = s->priv_data;

135 ModPlugFile *f = modplug->f;

136 char *extra;

137 const char *name = ModPlug_GetName(f);

138 const char *msg = ModPlug_GetMessage(f);

139

140 unsigned n_instruments = ModPlug_NumInstruments(f);

141 unsigned n_samples = ModPlug_NumSamples(f);

142 unsigned n_patterns = ModPlug_NumPatterns(f);

143 unsigned n_channels = ModPlug_NumChannels(f);

144

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

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

147

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

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

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

151 if (!extra)

152 return AVERROR(ENOMEM);

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

154

155 ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName);

156 ADD_META_MULTIPLE_ENTRIES(sample, ModPlug_SampleName);

157

158 return 0;

159 }

160

161 #define AUDIO_PKT_SIZE 512

162

163 static int modplug_read_header(AVFormatContext *s)

164 {

165 AVStream *st;

166 AVIOContext *pb = s->pb;

167 ModPlug_Settings settings;

168 ModPlugContext *modplug = s->priv_data;

169 int64_t sz = avio_size(pb);

170

171 if (sz < 0) {

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

173 sz = modplug->max_size;

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

175 sz = modplug->max_size;

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

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

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

179 }

180

181 if (modplug->color_eval) {

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

183 NULL, NULL, NULL, NULL, 0, s);

184 if (r < 0)

185 return r;

186 }

187

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

189 if (!modplug->buf)

190 return AVERROR(ENOMEM);

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

192

193 ModPlug_GetSettings(&settings);

194 settings.mChannels = 2;

195 settings.mBits = 16;

196 settings.mFrequency = 44100;

197 settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality

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

199

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

201 SET_OPT_IF_REQUESTED(mReverbDepth, reverb_depth, MODPLUG_ENABLE_REVERB);

202 SET_OPT_IF_REQUESTED(mReverbDelay, reverb_delay, MODPLUG_ENABLE_REVERB);

203 SET_OPT_IF_REQUESTED(mBassAmount, bass_amount, MODPLUG_ENABLE_MEGABASS);

204 SET_OPT_IF_REQUESTED(mBassRange, bass_range, MODPLUG_ENABLE_MEGABASS);

205 SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND);

206 SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND);

207

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

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

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

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

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

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

214

215 ModPlug_SetSettings(&settings);

216

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

218 if (!modplug->f)

219 return AVERROR_INVALIDDATA;

220

221 st = avformat_new_stream(s, NULL);

222 if (!st)

223 return AVERROR(ENOMEM);

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

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

226 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

227 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;

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

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

230

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

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

233

234 if (modplug->video_stream) {

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

236 if (!vst)

237 return AVERROR(ENOMEM);

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

239 vst->duration = st->duration;

240 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;

241 vst->codec->codec_id = AV_CODEC_ID_XBIN;

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

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

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

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

246 }

247

248 return modplug_load_metadata(s);

249 }

250

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

252 {

253 int i;

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

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

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

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

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

259 }

260 }

261

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

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

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

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

266 } while (0)

267

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

269 {

270 ModPlugContext *modplug = s->priv_data;

271

272 if (modplug->video_stream) {

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

274 if (modplug->video_switch) {

275 double var_values[VAR_VARS_NB];

276

277 var_values[VAR_W ] = modplug->w;

278 var_values[VAR_H ] = modplug->h;

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

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

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

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

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

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

285

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

287 return AVERROR(ENOMEM);

288 pkt->stream_index = 1;

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

290

291 if (modplug->print_textinfo) {

292 char intbuf[32];

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

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

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

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

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

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

299 }

300

301 if (modplug->expr) {

302 int x, y;

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

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

305 double color;

306 var_values[VAR_X] = x;

307 var_values[VAR_Y] = y;

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

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

310 }

311 }

312 }

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

314 pkt->flags |= AV_PKT_FLAG_KEY;

315 return 0;

316 }

317 }

318

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

320 return AVERROR(ENOMEM);

321

322 if (modplug->video_stream)

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

324

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

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

327 av_free_packet(pkt);

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

329 }

330 return 0;

331 }

332

333 static int modplug_read_close(AVFormatContext *s)

334 {

335 ModPlugContext *modplug = s->priv_data;

336 ModPlug_Unload(modplug->f);

337 av_freep(&modplug->buf);

338 return 0;

339 }

340

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

342 {

343 ModPlugContext *modplug = s->priv_data;

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

345 if (modplug->video_stream)

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

347 return 0;

348 }

349

350 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";

351

352 static int modplug_probe(AVProbeData *p)

353 {

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

355 if (p->buf_size < 16384)

356 return AVPROBE_SCORE_EXTENSION/2-1;

357 else

358 return AVPROBE_SCORE_EXTENSION;

359 }

360 return 0;

361 }

362

363 static const AVClass modplug_class = {

364 .class_name = "ModPlug demuxer",

365 .item_name = av_default_item_name,

366 .option = options,

367 .version = LIBAVUTIL_VERSION_INT,

368 };

369

370 AVInputFormat ff_libmodplug_demuxer = {

371 .name = "libmodplug",

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

373 .priv_data_size = sizeof(ModPlugContext),

374 .read_probe = modplug_probe,

375 .read_header = modplug_read_header,

376 .read_packet = modplug_read_packet,

377 .read_close = modplug_read_close,

378 .read_seek = modplug_read_seek,

379 .extensions = modplug_extensions,

380 .priv_class = &modplug_class,

381 };

Generated on Sat Jan 25 2014 19:52:03 for FFmpeg by doxygen 1.8.2