FFmpeg: libavformat/libmodplug.c Source File

FFmpeg
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  */
18 
19 /**
20 * @file
21 * ModPlug demuxer
22 * @todo better probing than extensions matching
23 */
24 
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"
32 
33  typedef struct ModPlugContext {
34   const AVClass *class;
35   ModPlugFile *f;
36   uint8_t *buf; ///< input file content
37 
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;
46 
47   int max_size; ///< max file size to allocate
48 
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;
62 
63  static const char * const var_names[] = {
64  "x", "y",
65  "w", "h",
66  "t",
67  "speed", "tempo", "order", "pattern", "row",
68  NULL
69 };
70 
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 };
78 
79  #define FF_MODPLUG_MAX_FILE_SIZE (100 * 1<<20) // 100M
80  #define FF_MODPLUG_DEF_FILE_SIZE ( 5 * 1<<20) // 5M
81 
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_packet_unref(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 };
NULL
#define NULL
Definition: coverity.c:32
s
const char * s
Definition: avisynth_c.h:631
ModPlugContext::reverb_delay
int reverb_delay
Definition: libmodplug.c:41
AVIOContext
Bytestream IO Context.
Definition: avio.h:111
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
FF_MODPLUG_DEF_FILE_SIZE
#define FF_MODPLUG_DEF_FILE_SIZE
Definition: libmodplug.c:80
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int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:287
ModPlugContext::h
int h
video stream height in char (one char = 8x8px)
Definition: libmodplug.c:55
h
h
Definition: vp9dsp_template.c:2093
AVOption
AVOption.
Definition: opt.h:245
ModPlugContext::linesize
int linesize
line size in bytes
Definition: libmodplug.c:58
ModPlugContext::fsize
int fsize
constant frame size
Definition: libmodplug.c:57
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static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: libmodplug.c:269
AV_LOG_WARNING
#define AV_LOG_WARNING
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Definition: log.h:182
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
AVProbeData::filename
const char * filename
Definition: avformat.h:461
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void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4149
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Definition: opt.h:223
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static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
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int size
Definition: avcodec.h:1468
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static AVStream * video_stream
Definition: demuxing_decoding.c:41
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int reverb_depth
Definition: libmodplug.c:40
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int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
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Definition: eval.c:657
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static AVPacket pkt
Definition: demuxing_decoding.c:54
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#define sample
Definition: flacdsp_template.c:44
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Format I/O context.
Definition: avformat.h:1314
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const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
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AVInputFormat ff_libmodplug_demuxer
Definition: libmodplug.c:371
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uint8_t
Definition: audio_convert.c:194
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#define av_malloc(s)
Definition: tableprint_vlc.h:31
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static const char *const var_names[]
Definition: libmodplug.c:63
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static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
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int packet_count
total number of audio packets
Definition: libmodplug.c:51
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Definition: eval.c:148
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AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3805
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Definition: opt.h:227
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uint8_t * data
Definition: avcodec.h:1467
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#define AVERROR_EOF
End of file.
Definition: error.h:55
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static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
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int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:81
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static const AVOption options[]
Definition: libmodplug.c:84
ModPlugContext::video_stream
int video_stream
1 if the user want a video stream, otherwise 0
Definition: libmodplug.c:53
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#define SET_OPT_IF_REQUESTED(libopt, opt, flag)
Definition: libmodplug.c:102
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#define av_log(a,...)
Definition: tableprint_vlc.h:28
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static int modplug_load_metadata(AVFormatContext *s)
Definition: libmodplug.c:133
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int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:545
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#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1499
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int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
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int print_textinfo
bool flag for printing speed, tempo, order, ...
Definition: libmodplug.c:52
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AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1528
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Definition: libopenh264enc.c:68
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Definition: error.h:43
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Definition: libmodplug.c:72
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#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
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const char * r
Definition: vf_curves.c:107
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Definition: avutil.h:194
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Definition: libmodplug.c:45
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A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1473
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AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:896
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int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:463
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char * av_asprintf(const char *fmt,...)
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Definition: aeval.c:46
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static const AVClass modplug_class
Definition: libmodplug.c:364
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Definition: avcodec.h:537
ModPlugContext::buf
uint8_t * buf
input file content
Definition: libmodplug.c:36
FF_MODPLUG_MAX_FILE_SIZE
#define FF_MODPLUG_MAX_FILE_SIZE
Definition: libmodplug.c:79
ModPlugContext::expr
AVExpr * expr
parsed color eval expression
Definition: libmodplug.c:60
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:78
read_probe
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1711
ModPlugContext::color_eval
char * color_eval
color eval user input expression
Definition: libmodplug.c:59
D
#define D
Definition: libmodplug.c:83
AVCodecContext::height
int height
Definition: avcodec.h:1711
modplug_read_header
static int modplug_read_header(AVFormatContext *s)
Definition: libmodplug.c:164
modplug_extensions
static const char modplug_extensions[]
Definition: libmodplug.c:351
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
ModPlugContext::video_switch
int video_switch
1 if current packet is video, otherwise 0
Definition: libmodplug.c:56
modplug_probe
static int modplug_probe(AVProbeData *p)
Definition: libmodplug.c:353
AVStream
Stream structure.
Definition: avformat.h:877
VAR_Y
Definition: libmodplug.c:72
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVCodecContext::codec_type
enum AVMediaType codec_type
Definition: avcodec.h:1540
ModPlugContext::noise_reduction
int noise_reduction
Definition: libmodplug.c:39
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1549
write_text
static void write_text(uint8_t *dst, const char *s, int linesize, int x, int y)
Definition: libmodplug.c:252
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:2287
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1356
ModPlugContext::max_size
int max_size
max file size to allocate
Definition: libmodplug.c:47
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:545
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
VAR_W
Definition: libmodplug.c:73
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:470
VAR_H
Definition: libmodplug.c:73
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:460
ModPlugContext::w
int w
video stream width in char (one char = 8x8px)
Definition: libmodplug.c:54
ModPlugContext::bass_range
int bass_range
Definition: libmodplug.c:43
ModPlugContext::f
ModPlugFile * f
Definition: libmodplug.c:35
flags
static int flags
Definition: cpu.c:47
PRINT_INFO
#define PRINT_INFO(line, name, idvalue)
Definition: libmodplug.c:263
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:936
avformat.h
Main libavformat public API header.
ModPlugContext::surround_depth
int surround_depth
Definition: libmodplug.c:44
AV_CODEC_ID_PCM_S16LE
Definition: avcodec.h:322
ModPlugContext::ts_per_packet
double ts_per_packet
used to define the pts/dts using packet_count;
Definition: libmodplug.c:50
AUDIO_PKT_SIZE
#define AUDIO_PKT_SIZE
Definition: libmodplug.c:162
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:712
AVCodecContext::channels
int channels
number of audio channels
Definition: avcodec.h:2288
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1342
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1466
modplug_read_close
static int modplug_read_close(AVFormatContext *s)
Definition: libmodplug.c:334
ModPlugContext::bass_amount
int bass_amount
Definition: libmodplug.c:42
OFFSET
#define OFFSET(x)
Definition: libmodplug.c:82
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1469
ADD_META_MULTIPLE_ENTRIES
#define ADD_META_MULTIPLE_ENTRIES(entry_name, fname)
Definition: libmodplug.c:109
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1444
modplug_read_seek
static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
Definition: libmodplug.c:342
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1460
eval.h
simple arithmetic expression evaluator
name
const char * name
Definition: opengl_enc.c:103
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