source: src/io/source_avcodec.c @ ba67cb6

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5sampler
Last change on this file since ba67cb6 was ba67cb6, checked in by Paul Brossier <piem@piem.org>, 7 years ago

src/io/source_avcodec.c: add libswresample

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1/*
2  Copyright (C) 2013 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
6  aubio is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10
11  aubio is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15
16  You should have received a copy of the GNU General Public License
17  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
18
19*/
20
21#include "aubio_priv.h"
22
23#ifdef HAVE_LIBAV
24
25#include <libavcodec/avcodec.h>
26#include <libavformat/avformat.h>
27#if defined(HAVE_SWRESAMPLE)
28#include <libswresample/swresample.h>
29#elif defined(HAVE_AVRESAMPLE)
30#include <libavresample/avresample.h>
31#endif
32#include <libavutil/opt.h>
33#include <stdlib.h>
34
35// determine whether we use libavformat from ffmpeg or from libav
36#define FFMPEG_LIBAVFORMAT (LIBAVFORMAT_VERSION_MICRO > 99 )
37// max_analyze_duration2 was used from ffmpeg libavformat 55.43.100 through 57.2.100
38#define FFMPEG_LIBAVFORMAT_MAX_DUR2 FFMPEG_LIBAVFORMAT && ( \
39      (LIBAVFORMAT_VERSION_MAJOR == 55 && LIBAVFORMAT_VERSION_MINOR >= 43) \
40      || (LIBAVFORMAT_VERSION_MAJOR == 56) \
41      || (LIBAVFORMAT_VERSION_MAJOR == 57 && LIBAVFORMAT_VERSION_MINOR < 2) \
42      )
43
44// backward compatibility with libavcodec55
45#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,28,1)
46#warning "libavcodec55 is deprecated"
47#define HAVE_AUBIO_LIBAVCODEC_DEPRECATED 1
48#define av_frame_alloc  avcodec_alloc_frame
49#define av_frame_free avcodec_free_frame
50#define av_packet_unref av_free_packet
51#endif
52
53#include "aubio_priv.h"
54#include "fvec.h"
55#include "fmat.h"
56#include "source_avcodec.h"
57
58#define AUBIO_AVCODEC_MAX_BUFFER_SIZE FF_MIN_BUFFER_SIZE
59
60struct _aubio_source_avcodec_t {
61  uint_t hop_size;
62  uint_t samplerate;
63  uint_t channels;
64
65  // some data about the file
66  char_t *path;
67  uint_t input_samplerate;
68  uint_t input_channels;
69
70  // avcodec stuff
71  AVFormatContext *avFormatCtx;
72  AVCodecContext *avCodecCtx;
73  AVFrame *avFrame;
74  AVPacket avPacket;
75#ifdef HAVE_AVRESAMPLE
76  AVAudioResampleContext *avr;
77#elif defined(HAVE_SWRESAMPLE)
78  SwrContext *avr;
79#endif
80  smpl_t *output;
81  uint_t read_samples;
82  uint_t read_index;
83  sint_t selected_stream;
84  uint_t eof;
85  uint_t multi;
86};
87
88// hack to create or re-create the context the first time _do or _do_multi is called
89void aubio_source_avcodec_reset_resampler(aubio_source_avcodec_t * s, uint_t multi);
90void aubio_source_avcodec_readframe(aubio_source_avcodec_t *s, uint_t * read_samples);
91
92uint_t aubio_source_avcodec_has_network_url(aubio_source_avcodec_t *s);
93
94uint_t aubio_source_avcodec_has_network_url(aubio_source_avcodec_t *s) {
95  char proto[20], authorization[256], hostname[128], uripath[256];
96  int proto_size = 20, authorization_size = 256, hostname_size = 128,
97      *port_ptr = 0, path_size = 256;
98  av_url_split(proto, proto_size, authorization, authorization_size, hostname,
99      hostname_size, port_ptr, uripath, path_size, s->path);
100  if (strlen(proto)) {
101    return 1;
102  }
103  return 0;
104}
105
106
107aubio_source_avcodec_t * new_aubio_source_avcodec(const char_t * path, uint_t samplerate, uint_t hop_size) {
108  aubio_source_avcodec_t * s = AUBIO_NEW(aubio_source_avcodec_t);
109  int err;
110  if (path == NULL) {
111    AUBIO_ERR("source_avcodec: Aborted opening null path\n");
112    goto beach;
113  }
114  if ((sint_t)samplerate < 0) {
115    AUBIO_ERR("source_avcodec: Can not open %s with samplerate %d\n", path, samplerate);
116    goto beach;
117  }
118  if ((sint_t)hop_size <= 0) {
119    AUBIO_ERR("source_avcodec: Can not open %s with hop_size %d\n", path, hop_size);
120    goto beach;
121  }
122
123  s->hop_size = hop_size;
124  s->channels = 1;
125
126  if (s->path) AUBIO_FREE(s->path);
127  s->path = AUBIO_ARRAY(char_t, strnlen(path, PATH_MAX) + 1);
128  strncpy(s->path, path, strnlen(path, PATH_MAX) + 1);
129
130  // register all formats and codecs
131  av_register_all();
132
133  if (aubio_source_avcodec_has_network_url(s)) {
134    avformat_network_init();
135  }
136
137  // try opening the file and get some info about it
138  AVFormatContext *avFormatCtx = s->avFormatCtx;
139  avFormatCtx = NULL;
140  if ( (err = avformat_open_input(&avFormatCtx, s->path, NULL, NULL) ) < 0 ) {
141    char errorstr[256];
142    av_strerror (err, errorstr, sizeof(errorstr));
143    AUBIO_ERR("source_avcodec: Failed opening %s (%s)\n", s->path, errorstr);
144    goto beach;
145  }
146
147  // try to make sure max_analyze_duration is big enough for most songs
148#if FFMPEG_LIBAVFORMAT_MAX_DUR2
149  avFormatCtx->max_analyze_duration2 *= 100;
150#else
151  avFormatCtx->max_analyze_duration *= 100;
152#endif
153
154  // retrieve stream information
155  if ( (err = avformat_find_stream_info(avFormatCtx, NULL)) < 0 ) {
156    char errorstr[256];
157    av_strerror (err, errorstr, sizeof(errorstr));
158    AUBIO_ERR("source_avcodec: Could not find stream information " "for %s (%s)\n", s->path,
159        errorstr);
160    goto beach;
161  }
162
163  // dump information about file onto standard error
164  //av_dump_format(avFormatCtx, 0, s->path, 0);
165
166  // look for the first audio stream
167  uint_t i;
168  sint_t selected_stream = -1;
169  for (i = 0; i < avFormatCtx->nb_streams; i++) {
170#if FF_API_LAVF_AVCTX
171    if (avFormatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
172#else
173    if (avFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
174#endif
175      if (selected_stream == -1) {
176        selected_stream = i;
177      } else {
178        AUBIO_WRN("source_avcodec: More than one audio stream in %s, "
179            "taking the first one\n", s->path);
180      }
181    }
182  }
183  if (selected_stream == -1) {
184    AUBIO_ERR("source_avcodec: No audio stream in %s\n", s->path);
185    goto beach;
186  }
187  //AUBIO_DBG("Taking stream %d in file %s\n", selected_stream, s->path);
188  s->selected_stream = selected_stream;
189
190  AVCodecContext *avCodecCtx = s->avCodecCtx;
191#if FF_API_LAVF_AVCTX
192  AVCodecParameters *codecpar = avFormatCtx->streams[selected_stream]->codecpar;
193  if (codecpar == NULL) {
194    AUBIO_ERR("source_avcodec: Could not find decoder for %s", s->path);
195    goto beach;
196  }
197  AVCodec *codec = avcodec_find_decoder(codecpar->codec_id);
198
199  /* Allocate a codec context for the decoder */
200  avCodecCtx = avcodec_alloc_context3(codec);
201  if (!avCodecCtx) {
202    AUBIO_ERR("source_avcodec: Failed to allocate the %s codec context for path %s\n",
203        av_get_media_type_string(AVMEDIA_TYPE_AUDIO), s->path);
204    goto beach;
205  }
206#else
207  avCodecCtx = avFormatCtx->streams[selected_stream]->codec;
208  AVCodec *codec = avcodec_find_decoder(avCodecCtx->codec_id);
209#endif
210  if (codec == NULL) {
211    AUBIO_ERR("source_avcodec: Could not find decoder for %s", s->path);
212    goto beach;
213  }
214
215#if FF_API_LAVF_AVCTX
216  /* Copy codec parameters from input stream to output codec context */
217  if ((err = avcodec_parameters_to_context(avCodecCtx, codecpar)) < 0) {
218    AUBIO_ERR("source_avcodec: Failed to copy %s codec parameters to decoder context for %s\n",
219       av_get_media_type_string(AVMEDIA_TYPE_AUDIO), s->path);
220    goto beach;
221  }
222#endif
223
224  if ( ( err = avcodec_open2(avCodecCtx, codec, NULL) ) < 0) {
225    char errorstr[256];
226    av_strerror (err, errorstr, sizeof(errorstr));
227    AUBIO_ERR("source_avcodec: Could not load codec for %s (%s)\n", s->path, errorstr);
228    goto beach;
229  }
230
231  /* get input specs */
232  s->input_samplerate = avCodecCtx->sample_rate;
233  s->input_channels   = avCodecCtx->channels;
234  //AUBIO_DBG("input_samplerate: %d\n", s->input_samplerate);
235  //AUBIO_DBG("input_channels: %d\n", s->input_channels);
236
237  if (samplerate == 0) {
238    s->samplerate = s->input_samplerate;
239  } else {
240    s->samplerate = samplerate;
241  }
242
243  if (s->samplerate >  s->input_samplerate) {
244    AUBIO_WRN("source_avcodec: upsampling %s from %d to %d\n", s->path,
245        s->input_samplerate, s->samplerate);
246  }
247
248  AVFrame *avFrame = s->avFrame;
249  avFrame = av_frame_alloc();
250  if (!avFrame) {
251    AUBIO_ERR("source_avcodec: Could not allocate frame for (%s)\n", s->path);
252  }
253
254  /* allocate output for avr */
255  s->output = (smpl_t *)av_malloc(AUBIO_AVCODEC_MAX_BUFFER_SIZE * sizeof(smpl_t));
256
257  s->read_samples = 0;
258  s->read_index = 0;
259
260  s->avFormatCtx = avFormatCtx;
261  s->avCodecCtx = avCodecCtx;
262  s->avFrame = avFrame;
263
264  // default to mono output
265  aubio_source_avcodec_reset_resampler(s, 0);
266
267  s->eof = 0;
268  s->multi = 0;
269
270  //av_log_set_level(AV_LOG_QUIET);
271
272  return s;
273
274beach:
275  //AUBIO_ERR("can not read %s at samplerate %dHz with a hop_size of %d\n",
276  //    s->path, s->samplerate, s->hop_size);
277  del_aubio_source_avcodec(s);
278  return NULL;
279}
280
281void aubio_source_avcodec_reset_resampler(aubio_source_avcodec_t * s, uint_t multi) {
282  // create or reset resampler to/from mono/multi-channel
283  if ( (multi != s->multi) || (s->avr == NULL) ) {
284    int64_t input_layout = av_get_default_channel_layout(s->input_channels);
285    uint_t output_channels = multi ? s->input_channels : 1;
286    int64_t output_layout = av_get_default_channel_layout(output_channels);
287#ifdef HAVE_AVRESAMPLE
288    AVAudioResampleContext *avr = avresample_alloc_context();
289    AVAudioResampleContext *oldavr = s->avr;
290#elif defined(HAVE_SWRESAMPLE)
291    SwrContext *avr = swr_alloc();
292    SwrContext *oldavr = s->avr;
293#endif /* HAVE_AVRESAMPLE || HAVE_SWRESAMPLE */
294
295    av_opt_set_int(avr, "in_channel_layout",  input_layout,           0);
296    av_opt_set_int(avr, "out_channel_layout", output_layout,          0);
297    av_opt_set_int(avr, "in_sample_rate",     s->input_samplerate,    0);
298    av_opt_set_int(avr, "out_sample_rate",    s->samplerate,          0);
299    av_opt_set_int(avr, "in_sample_fmt",      s->avCodecCtx->sample_fmt, 0);
300#if HAVE_AUBIO_DOUBLE
301    av_opt_set_int(avr, "out_sample_fmt",     AV_SAMPLE_FMT_DBL,      0);
302#else
303    av_opt_set_int(avr, "out_sample_fmt",     AV_SAMPLE_FMT_FLT,      0);
304#endif
305    // TODO: use planar?
306    //av_opt_set_int(avr, "out_sample_fmt",     AV_SAMPLE_FMT_FLTP,      0);
307    int err;
308#ifdef HAVE_AVRESAMPLE
309    if ( ( err = avresample_open(avr) ) < 0) {
310#elif defined(HAVE_SWRESAMPLE)
311    if ( ( err = swr_init(avr) ) < 0) {
312#endif /* HAVE_AVRESAMPLE || HAVE_SWRESAMPLE */
313      char errorstr[256];
314      av_strerror (err, errorstr, sizeof(errorstr));
315      AUBIO_ERR("source_avcodec: Could not open AVAudioResampleContext for %s (%s)\n",
316          s->path, errorstr);
317      //goto beach;
318      return;
319    }
320    s->avr = avr;
321    if (oldavr != NULL) {
322#ifdef HAVE_AVRESAMPLE
323      avresample_close( oldavr );
324#elif defined(HAVE_SWRESAMPLE)
325      swr_close ( oldavr );
326#endif /* HAVE_AVRESAMPLE || HAVE_SWRESAMPLE */
327      av_free ( oldavr );
328      oldavr = NULL;
329    }
330    s->multi = multi;
331  }
332}
333
334void aubio_source_avcodec_readframe(aubio_source_avcodec_t *s, uint_t * read_samples) {
335  AVFormatContext *avFormatCtx = s->avFormatCtx;
336  AVCodecContext *avCodecCtx = s->avCodecCtx;
337  AVFrame *avFrame = s->avFrame;
338  AVPacket avPacket = s->avPacket;
339  av_init_packet (&avPacket);
340#ifdef HAVE_AVRESAMPLE
341  AVAudioResampleContext *avr = s->avr;
342#elif defined(HAVE_SWRESAMPLE)
343  SwrContext *avr = s->avr;
344#endif /* HAVE_AVRESAMPLE || HAVE_SWRESAMPLE */
345  smpl_t *output = s->output;
346  *read_samples = 0;
347
348  do
349  {
350    int err = av_read_frame (avFormatCtx, &avPacket);
351    if (err == AVERROR_EOF) {
352      s->eof = 1;
353      goto beach;
354    }
355    if (err != 0) {
356      char errorstr[256];
357      av_strerror (err, errorstr, sizeof(errorstr));
358      AUBIO_ERR("source_avcodec: could not read frame in %s (%s)\n", s->path, errorstr);
359      goto beach;
360    }
361  } while (avPacket.stream_index != s->selected_stream);
362
363  int got_frame = 0;
364#if FF_API_LAVF_AVCTX
365  int ret = avcodec_send_packet(avCodecCtx, &avPacket);
366  if (ret < 0 && ret != AVERROR_EOF) {
367    AUBIO_ERR("source_avcodec: error when sending packet for %s\n", s->path);
368    goto beach;
369  }
370  ret = avcodec_receive_frame(avCodecCtx, avFrame);
371  if (ret >= 0) {
372    got_frame = 1;
373  }
374  if (ret < 0) {
375    if (ret == AVERROR(EAGAIN)) {
376      AUBIO_WRN("source_avcodec: output is not available right now - user must try to send new input\n");
377    } else if (ret == AVERROR_EOF) {
378      AUBIO_WRN("source_avcodec: the decoder has been fully flushed, and there will be no more output frames\n");
379    } else {
380      AUBIO_ERR("source_avcodec: decoding errors on %s\n", s->path);
381      goto beach;
382    }
383  }
384#else
385  int len = avcodec_decode_audio4(avCodecCtx, avFrame, &got_frame, &avPacket);
386
387  if (len < 0) {
388    AUBIO_ERR("source_avcodec: error while decoding %s\n", s->path);
389    goto beach;
390  }
391#endif
392  if (got_frame == 0) {
393    AUBIO_WRN("source_avcodec: did not get a frame when reading %s\n", s->path);
394    goto beach;
395  }
396
397#ifdef HAVE_AVRESAMPLE
398  int in_linesize = 0;
399  av_samples_get_buffer_size(&in_linesize, avCodecCtx->channels,
400      avFrame->nb_samples, avCodecCtx->sample_fmt, 1);
401  int in_samples = avFrame->nb_samples;
402  int out_linesize = 0;
403  int max_out_samples = AUBIO_AVCODEC_MAX_BUFFER_SIZE;
404  int out_samples = avresample_convert ( avr,
405        (uint8_t **)&output, out_linesize, max_out_samples,
406        (uint8_t **)avFrame->data, in_linesize, in_samples);
407#elif defined(HAVE_SWRESAMPLE)
408  int in_samples = avFrame->nb_samples;
409  int max_out_samples = AUBIO_AVCODEC_MAX_BUFFER_SIZE / avCodecCtx->channels;
410  int out_samples = swr_convert( avr,
411      (uint8_t **)&output, max_out_samples,
412      (const uint8_t **)avFrame->data, in_samples);
413#endif /* HAVE_AVRESAMPLE || HAVE_SWRESAMPLE */
414  if (out_samples <= 0) {
415    AUBIO_WRN("source_avcodec: no sample found while converting frame (%s)\n", s->path);
416    goto beach;
417  }
418
419  *read_samples = out_samples;
420
421beach:
422  s->avFormatCtx = avFormatCtx;
423  s->avCodecCtx = avCodecCtx;
424  s->avFrame = avFrame;
425#if defined(HAVE_AVRESAMPLE) || defined(HAVE_SWRESAMPLE)
426  s->avr = avr;
427#endif /* HAVE_AVRESAMPLE || HAVE_SWRESAMPLE */
428  s->output = output;
429
430  av_packet_unref(&avPacket);
431}
432
433void aubio_source_avcodec_do(aubio_source_avcodec_t * s, fvec_t * read_data, uint_t * read){
434  uint_t i;
435  uint_t end = 0;
436  uint_t total_wrote = 0;
437  // switch from multi
438  if (s->multi == 1) aubio_source_avcodec_reset_resampler(s, 0);
439  while (total_wrote < s->hop_size) {
440    end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
441    for (i = 0; i < end; i++) {
442      read_data->data[i + total_wrote] = s->output[i + s->read_index];
443    }
444    total_wrote += end;
445    if (total_wrote < s->hop_size) {
446      uint_t avcodec_read = 0;
447      aubio_source_avcodec_readframe(s, &avcodec_read);
448      s->read_samples = avcodec_read;
449      s->read_index = 0;
450      if (s->eof) {
451        break;
452      }
453    } else {
454      s->read_index += end;
455    }
456  }
457  if (total_wrote < s->hop_size) {
458    for (i = total_wrote; i < s->hop_size; i++) {
459      read_data->data[i] = 0.;
460    }
461  }
462  *read = total_wrote;
463}
464
465void aubio_source_avcodec_do_multi(aubio_source_avcodec_t * s, fmat_t * read_data, uint_t * read){
466  uint_t i,j;
467  uint_t end = 0;
468  uint_t total_wrote = 0;
469  // switch from mono
470  if (s->multi == 0) aubio_source_avcodec_reset_resampler(s, 1);
471  while (total_wrote < s->hop_size) {
472    end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
473    for (j = 0; j < read_data->height; j++) {
474      for (i = 0; i < end; i++) {
475        read_data->data[j][i + total_wrote] =
476          s->output[(i + s->read_index) * s->input_channels + j];
477      }
478    }
479    total_wrote += end;
480    if (total_wrote < s->hop_size) {
481      uint_t avcodec_read = 0;
482      aubio_source_avcodec_readframe(s, &avcodec_read);
483      s->read_samples = avcodec_read;
484      s->read_index = 0;
485      if (s->eof) {
486        break;
487      }
488    } else {
489      s->read_index += end;
490    }
491  }
492  if (total_wrote < s->hop_size) {
493    for (j = 0; j < read_data->height; j++) {
494      for (i = total_wrote; i < s->hop_size; i++) {
495        read_data->data[j][i] = 0.;
496      }
497    }
498  }
499  *read = total_wrote;
500}
501
502uint_t aubio_source_avcodec_get_samplerate(const aubio_source_avcodec_t * s) {
503  return s->samplerate;
504}
505
506uint_t aubio_source_avcodec_get_channels(const aubio_source_avcodec_t * s) {
507  return s->input_channels;
508}
509
510uint_t aubio_source_avcodec_seek (aubio_source_avcodec_t * s, uint_t pos) {
511  int64_t resampled_pos = (uint_t)ROUND(pos * (s->input_samplerate * 1. / s->samplerate));
512  int64_t min_ts = MAX(resampled_pos - 2000, 0);
513  int64_t max_ts = MIN(resampled_pos + 2000, INT64_MAX);
514  int seek_flags = AVSEEK_FLAG_FRAME | AVSEEK_FLAG_ANY;
515  int ret = AUBIO_FAIL;
516  if (s->avFormatCtx != NULL && s->avr != NULL) {
517    ret = AUBIO_OK;
518  } else {
519    AUBIO_ERR("source_avcodec: failed seeking in %s (file not opened?)", s->path);
520    return ret;
521  }
522  if ((sint_t)pos < 0) {
523    AUBIO_ERR("source_avcodec: could not seek %s at %d (seeking position"
524       " should be >= 0)\n", s->path, pos);
525    return AUBIO_FAIL;
526  }
527  ret = avformat_seek_file(s->avFormatCtx, s->selected_stream,
528      min_ts, resampled_pos, max_ts, seek_flags);
529  if (ret < 0) {
530    AUBIO_ERR("source_avcodec: failed seeking to %d in file %s", pos, s->path);
531  }
532  // reset read status
533  s->eof = 0;
534  s->read_index = 0;
535  s->read_samples = 0;
536#ifdef HAVE_AVRESAMPLE
537  // reset the AVAudioResampleContext
538  avresample_close(s->avr);
539  avresample_open(s->avr);
540#elif defined(HAVE_SWRESAMPLE)
541  swr_close(s->avr);
542  swr_init(s->avr);
543#endif
544  return ret;
545}
546
547uint_t aubio_source_avcodec_get_duration (aubio_source_avcodec_t * s) {
548  if (s && &(s->avFormatCtx) != NULL) {
549    int64_t duration = s->avFormatCtx->duration;
550    return s->samplerate * ((uint_t)duration / 1e6 );
551  }
552  return 0;
553}
554
555uint_t aubio_source_avcodec_close(aubio_source_avcodec_t * s) {
556  if (s->avr != NULL) {
557#ifdef HAVE_AVRESAMPLE
558    avresample_close( s->avr );
559#elif defined(HAVE_SWRESAMPLE)
560    swr_close ( s->avr );
561#endif
562    av_free ( s->avr );
563  }
564  s->avr = NULL;
565  if (s->avCodecCtx != NULL) {
566    avcodec_close ( s->avCodecCtx );
567  }
568  s->avCodecCtx = NULL;
569  if (s->avFormatCtx != NULL) {
570    avformat_close_input(&s->avFormatCtx);
571#ifndef HAVE_AUBIO_LIBAVCODEC_DEPRECATED // avoid crash on old libavcodec54
572    avformat_free_context(s->avFormatCtx);
573#endif
574    s->avFormatCtx = NULL;
575  }
576  av_packet_unref(&s->avPacket);
577  return AUBIO_OK;
578}
579
580void del_aubio_source_avcodec(aubio_source_avcodec_t * s){
581  if (!s) return;
582  aubio_source_avcodec_close(s);
583  if (s->output != NULL) {
584    av_free(s->output);
585  }
586  s->output = NULL;
587  if (s->avFrame != NULL) {
588    av_frame_free( &(s->avFrame) );
589  }
590  s->avFrame = NULL;
591  if (s->path) {
592    AUBIO_FREE(s->path);
593  }
594  s->path = NULL;
595  AUBIO_FREE(s);
596}
597
598#endif /* HAVE_LIBAV */
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