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00025 #include <libmodplug/modplug.h>
00026 #include "libavutil/avstring.h"
00027 #include "libavutil/eval.h"
00028 #include "libavutil/opt.h"
00029 #include "avformat.h"
00030 #include "internal.h"
00031
00032 typedef struct ModPlugContext {
00033 const AVClass *class;
00034 ModPlugFile *f;
00035 uint8_t *buf;
00036
00037
00038 int noise_reduction;
00039 int reverb_depth;
00040 int reverb_delay;
00041 int bass_amount;
00042 int bass_range;
00043 int surround_depth;
00044 int surround_delay;
00045
00046 int max_size;
00047
00048
00049 double ts_per_packet;
00050 int packet_count;
00051 int print_textinfo;
00052 int video_stream;
00053 int w;
00054 int h;
00055 int video_switch;
00056 int fsize;
00057 int linesize;
00058 char *color_eval;
00059 AVExpr *expr;
00060 } ModPlugContext;
00061
00062 static const char *var_names[] = {
00063 "x", "y",
00064 "w", "h",
00065 "t",
00066 "speed", "tempo", "order", "pattern", "row",
00067 NULL
00068 };
00069
00070 enum var_name {
00071 VAR_X, VAR_Y,
00072 VAR_W, VAR_H,
00073 VAR_TIME,
00074 VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW,
00075 VAR_VARS_NB
00076 };
00077
00078 #define FF_MODPLUG_MAX_FILE_SIZE (100 * 1<<20) // 100M
00079 #define FF_MODPLUG_DEF_FILE_SIZE ( 5 * 1<<20) // 5M
00080
00081 #define OFFSET(x) offsetof(ModPlugContext, x)
00082 #define D AV_OPT_FLAG_DECODING_PARAM
00083 static const AVOption options[] = {
00084 {"noise_reduction", "Enable noise reduction 0(off)-1(on)", OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D},
00085 {"reverb_depth", "Reverb level 0(quiet)-100(loud)", OFFSET(reverb_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
00086 {"reverb_delay", "Reverb delay in ms, usually 40-200ms", OFFSET(reverb_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},
00087 {"bass_amount", "XBass level 0(quiet)-100(loud)", OFFSET(bass_amount), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
00088 {"bass_range", "XBass cutoff in Hz 10-100", OFFSET(bass_range), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
00089 {"surround_depth", "Surround level 0(quiet)-100(heavy)", OFFSET(surround_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
00090 {"surround_delay", "Surround delay in ms, usually 5-40ms", OFFSET(surround_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},
00091 {"max_size", "Max file size supported (in bytes). Default is 5MB. Set to 0 for no limit (not recommended)",
00092 OFFSET(max_size), AV_OPT_TYPE_INT, {.i64 = FF_MODPLUG_DEF_FILE_SIZE}, 0, FF_MODPLUG_MAX_FILE_SIZE, D},
00093 {"video_stream_expr", "Color formula", OFFSET(color_eval), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D},
00094 {"video_stream", "Make demuxer output a video stream", OFFSET(video_stream), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D},
00095 {"video_stream_w", "Video stream width in char (one char = 8x8px)", OFFSET(w), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},
00096 {"video_stream_h", "Video stream height in char (one char = 8x8px)", OFFSET(h), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},
00097 {"video_stream_ptxt", "Print speed, tempo, order, ... in video stream", OFFSET(print_textinfo), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, D},
00098 {NULL},
00099 };
00100
00101 #define SET_OPT_IF_REQUESTED(libopt, opt, flag) do { \
00102 if (modplug->opt) { \
00103 settings.libopt = modplug->opt; \
00104 settings.mFlags |= flag; \
00105 } \
00106 } while (0)
00107
00108 #define ADD_META_MULTIPLE_ENTRIES(entry_name, fname) do { \
00109 if (n_## entry_name ##s) { \
00110 unsigned i, n = 0; \
00111 \
00112 for (i = 0; i < n_## entry_name ##s; i++) { \
00113 char item_name[64] = {0}; \
00114 fname(f, i, item_name); \
00115 if (!*item_name) \
00116 continue; \
00117 if (n) \
00118 av_dict_set(&s->metadata, #entry_name, "\n", AV_DICT_APPEND); \
00119 av_dict_set(&s->metadata, #entry_name, item_name, AV_DICT_APPEND); \
00120 n++; \
00121 } \
00122 \
00123 extra = av_asprintf(", %u/%u " #entry_name "%s", \
00124 n, n_## entry_name ##s, n > 1 ? "s" : ""); \
00125 if (!extra) \
00126 return AVERROR(ENOMEM); \
00127 av_dict_set(&s->metadata, "extra info", extra, AV_DICT_APPEND); \
00128 av_free(extra); \
00129 } \
00130 } while (0)
00131
00132 static int modplug_load_metadata(AVFormatContext *s)
00133 {
00134 ModPlugContext *modplug = s->priv_data;
00135 ModPlugFile *f = modplug->f;
00136 char *extra;
00137 const char *name = ModPlug_GetName(f);
00138 const char *msg = ModPlug_GetMessage(f);
00139
00140 unsigned n_instruments = ModPlug_NumInstruments(f);
00141 unsigned n_samples = ModPlug_NumSamples(f);
00142 unsigned n_patterns = ModPlug_NumPatterns(f);
00143 unsigned n_channels = ModPlug_NumChannels(f);
00144
00145 if (name && *name) av_dict_set(&s->metadata, "name", name, 0);
00146 if (msg && *msg) av_dict_set(&s->metadata, "message", msg, 0);
00147
00148 extra = av_asprintf("%u pattern%s, %u channel%s",
00149 n_patterns, n_patterns > 1 ? "s" : "",
00150 n_channels, n_channels > 1 ? "s" : "");
00151 if (!extra)
00152 return AVERROR(ENOMEM);
00153 av_dict_set(&s->metadata, "extra info", extra, AV_DICT_DONT_STRDUP_VAL);
00154
00155 ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName);
00156 ADD_META_MULTIPLE_ENTRIES(sample, ModPlug_SampleName);
00157
00158 return 0;
00159 }
00160
00161 #define AUDIO_PKT_SIZE 512
00162
00163 static int modplug_read_header(AVFormatContext *s)
00164 {
00165 AVStream *st;
00166 AVIOContext *pb = s->pb;
00167 ModPlug_Settings settings;
00168 ModPlugContext *modplug = s->priv_data;
00169 int sz = avio_size(pb);
00170
00171 if (sz < 0) {
00172 av_log(s, AV_LOG_WARNING, "Could not determine file size\n");
00173 sz = modplug->max_size;
00174 } else if (modplug->max_size && sz > modplug->max_size) {
00175 sz = modplug->max_size;
00176 av_log(s, AV_LOG_WARNING, "Max file size reach%s, allocating %dB "
00177 "but demuxing is likely to fail due to incomplete buffer\n",
00178 sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz);
00179 }
00180
00181 if (modplug->color_eval) {
00182 int r = av_expr_parse(&modplug->expr, modplug->color_eval, var_names,
00183 NULL, NULL, NULL, NULL, 0, s);
00184 if (r < 0)
00185 return r;
00186 }
00187
00188 modplug->buf = av_malloc(modplug->max_size);
00189 if (!modplug->buf)
00190 return AVERROR(ENOMEM);
00191 sz = avio_read(pb, modplug->buf, sz);
00192
00193 ModPlug_GetSettings(&settings);
00194 settings.mChannels = 2;
00195 settings.mBits = 16;
00196 settings.mFrequency = 44100;
00197 settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
00198 settings.mLoopCount = 0;
00199
00200 if (modplug->noise_reduction) settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION;
00201 SET_OPT_IF_REQUESTED(mReverbDepth, reverb_depth, MODPLUG_ENABLE_REVERB);
00202 SET_OPT_IF_REQUESTED(mReverbDelay, reverb_delay, MODPLUG_ENABLE_REVERB);
00203 SET_OPT_IF_REQUESTED(mBassAmount, bass_amount, MODPLUG_ENABLE_MEGABASS);
00204 SET_OPT_IF_REQUESTED(mBassRange, bass_range, MODPLUG_ENABLE_MEGABASS);
00205 SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND);
00206 SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND);
00207
00208 if (modplug->reverb_depth) settings.mReverbDepth = modplug->reverb_depth;
00209 if (modplug->reverb_delay) settings.mReverbDelay = modplug->reverb_delay;
00210 if (modplug->bass_amount) settings.mBassAmount = modplug->bass_amount;
00211 if (modplug->bass_range) settings.mBassRange = modplug->bass_range;
00212 if (modplug->surround_depth) settings.mSurroundDepth = modplug->surround_depth;
00213 if (modplug->surround_delay) settings.mSurroundDelay = modplug->surround_delay;
00214
00215 ModPlug_SetSettings(&settings);
00216
00217 modplug->f = ModPlug_Load(modplug->buf, sz);
00218 if (!modplug->f)
00219 return AVERROR_INVALIDDATA;
00220
00221 st = avformat_new_stream(s, NULL);
00222 if (!st)
00223 return AVERROR(ENOMEM);
00224 avpriv_set_pts_info(st, 64, 1, 1000);
00225 st->duration = ModPlug_GetLength(modplug->f);
00226 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00227 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
00228 st->codec->channels = settings.mChannels;
00229 st->codec->sample_rate = settings.mFrequency;
00230
00231
00232 modplug->ts_per_packet = 1000*AUDIO_PKT_SIZE / (4*44100.);
00233
00234 if (modplug->video_stream) {
00235 AVStream *vst = avformat_new_stream(s, NULL);
00236 if (!vst)
00237 return AVERROR(ENOMEM);
00238 avpriv_set_pts_info(vst, 64, 1, 1000);
00239 vst->duration = st->duration;
00240 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00241 vst->codec->codec_id = AV_CODEC_ID_XBIN;
00242 vst->codec->width = modplug->w << 3;
00243 vst->codec->height = modplug->h << 3;
00244 modplug->linesize = modplug->w * 3;
00245 modplug->fsize = modplug->linesize * modplug->h;
00246 }
00247
00248 return modplug_load_metadata(s);
00249 }
00250
00251 static void write_text(uint8_t *dst, const char *s, int linesize, int x, int y)
00252 {
00253 int i;
00254 dst += y*linesize + x*3;
00255 for (i = 0; s[i]; i++, dst += 3) {
00256 dst[0] = 0x0;
00257 dst[1] = s[i];
00258 dst[2] = 0x0f;
00259 }
00260 }
00261
00262 #define PRINT_INFO(line, name, idvalue) do { \
00263 snprintf(intbuf, sizeof(intbuf), "%.0f", var_values[idvalue]); \
00264 write_text(pkt->data, name ":", modplug->linesize, 0+1, line+1); \
00265 write_text(pkt->data, intbuf, modplug->linesize, 10+1, line+1); \
00266 } while (0)
00267
00268 static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
00269 {
00270 ModPlugContext *modplug = s->priv_data;
00271
00272 if (modplug->video_stream) {
00273 modplug->video_switch ^= 1;
00274 if (modplug->video_switch) {
00275 double var_values[VAR_VARS_NB];
00276
00277 var_values[VAR_W ] = modplug->w;
00278 var_values[VAR_H ] = modplug->h;
00279 var_values[VAR_TIME ] = modplug->packet_count * modplug->ts_per_packet;
00280 var_values[VAR_SPEED ] = ModPlug_GetCurrentSpeed (modplug->f);
00281 var_values[VAR_TEMPO ] = ModPlug_GetCurrentTempo (modplug->f);
00282 var_values[VAR_ORDER ] = ModPlug_GetCurrentOrder (modplug->f);
00283 var_values[VAR_PATTERN] = ModPlug_GetCurrentPattern(modplug->f);
00284 var_values[VAR_ROW ] = ModPlug_GetCurrentRow (modplug->f);
00285
00286 if (av_new_packet(pkt, modplug->fsize) < 0)
00287 return AVERROR(ENOMEM);
00288 pkt->stream_index = 1;
00289 memset(pkt->data, 0, modplug->fsize);
00290
00291 if (modplug->print_textinfo) {
00292 char intbuf[32];
00293 PRINT_INFO(0, "speed", VAR_SPEED);
00294 PRINT_INFO(1, "tempo", VAR_TEMPO);
00295 PRINT_INFO(2, "order", VAR_ORDER);
00296 PRINT_INFO(3, "pattern", VAR_PATTERN);
00297 PRINT_INFO(4, "row", VAR_ROW);
00298 PRINT_INFO(5, "ts", VAR_TIME);
00299 }
00300
00301 if (modplug->expr) {
00302 int x, y;
00303 for (y = 0; y < modplug->h; y++) {
00304 for (x = 0; x < modplug->w; x++) {
00305 double color;
00306 var_values[VAR_X] = x;
00307 var_values[VAR_Y] = y;
00308 color = av_expr_eval(modplug->expr, var_values, NULL);
00309 pkt->data[y*modplug->linesize + x*3 + 2] |= av_clip((int)color, 0, 0xf)<<4;
00310 }
00311 }
00312 }
00313 pkt->pts = pkt->dts = var_values[VAR_TIME];
00314 pkt->flags |= AV_PKT_FLAG_KEY;
00315 return 0;
00316 }
00317 }
00318
00319 if (av_new_packet(pkt, AUDIO_PKT_SIZE) < 0)
00320 return AVERROR(ENOMEM);
00321
00322 if (modplug->video_stream)
00323 pkt->pts = pkt->dts = modplug->packet_count++ * modplug->ts_per_packet;
00324
00325 pkt->size = ModPlug_Read(modplug->f, pkt->data, AUDIO_PKT_SIZE);
00326 if (pkt->size <= 0) {
00327 av_free_packet(pkt);
00328 return pkt->size == 0 ? AVERROR_EOF : AVERROR(EIO);
00329 }
00330 return 0;
00331 }
00332
00333 static int modplug_read_close(AVFormatContext *s)
00334 {
00335 ModPlugContext *modplug = s->priv_data;
00336 ModPlug_Unload(modplug->f);
00337 av_freep(&modplug->buf);
00338 return 0;
00339 }
00340
00341 static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
00342 {
00343 ModPlugContext *modplug = s->priv_data;
00344 ModPlug_Seek(modplug->f, (int)ts);
00345 if (modplug->video_stream)
00346 modplug->packet_count = ts / modplug->ts_per_packet;
00347 return 0;
00348 }
00349
00350 static const AVClass modplug_class = {
00351 .class_name = "ModPlug demuxer",
00352 .item_name = av_default_item_name,
00353 .option = options,
00354 .version = LIBAVUTIL_VERSION_INT,
00355 };
00356
00357 AVInputFormat ff_libmodplug_demuxer = {
00358 .name = "libmodplug",
00359 .long_name = NULL_IF_CONFIG_SMALL("ModPlug demuxer"),
00360 .priv_data_size = sizeof(ModPlugContext),
00361 .read_header = modplug_read_header,
00362 .read_packet = modplug_read_packet,
00363 .read_close = modplug_read_close,
00364 .read_seek = modplug_read_seek,
00365 .extensions = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm"
00366 ",itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz",
00367 .priv_class = &modplug_class,
00368 };
