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aiffenc.c
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1 /*
2  * AIFF/AIFF-C muxer
3  * Copyright (c) 2006 Patrick Guimond
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/intfloat.h"
23 #include "libavutil/opt.h"
24 #include "avformat.h"
25 #include "internal.h"
26 #include "aiff.h"
27 #include "avio_internal.h"
28 #include "isom.h"
29 #include "id3v2.h"
30 
31 typedef struct {
32  const AVClass *class;
33  int64_t form;
34  int64_t frames;
35  int64_t ssnd;
41 
43 {
44  int ret;
45  uint64_t pos, end, size;
46  ID3v2EncContext id3v2 = { 0 };
47  AVIOContext *pb = s->pb;
48  AVPacketList *pict_list = aiff->pict_list;
49 
50  if (!pb->seekable)
51  return 0;
52 
53  if (!s->metadata && !aiff->pict_list)
54  return 0;
55 
56  avio_wl32(pb, MKTAG('I', 'D', '3', ' '));
57  avio_wb32(pb, 0);
58  pos = avio_tell(pb);
59 
61  ff_id3v2_write_metadata(s, &id3v2);
62  while (pict_list) {
63  if ((ret = ff_id3v2_write_apic(s, &id3v2, &pict_list->pkt)) < 0)
64  return ret;
65  pict_list = pict_list->next;
66  }
67  ff_id3v2_finish(&id3v2, pb);
68 
69  end = avio_tell(pb);
70  size = end - pos;
71 
72  /* Update chunk size */
73  avio_seek(pb, pos - 4, SEEK_SET);
74  avio_wb32(pb, size);
75  avio_seek(pb, end, SEEK_SET);
76 
77  if (size & 1)
78  avio_w8(pb, 0);
79 
80  return 0;
81 }
82 
83 static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
84 {
86  AVIOContext *pb = s->pb;
87 
88  if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
89  int size = strlen(tag->value);
90 
91  avio_wl32(pb, id);
92  avio_wb32(pb, FFALIGN(size, 2));
93  avio_write(pb, tag->value, size);
94  if (size & 1)
95  avio_w8(pb, 0);
96  }
97 }
98 
100 {
101  AIFFOutputContext *aiff = s->priv_data;
102  AVIOContext *pb = s->pb;
103  AVCodecContext *enc;
104  uint64_t sample_rate;
105  int i, aifc = 0;
106 
107  aiff->audio_stream_idx = -1;
108  for (i = 0; i < s->nb_streams; i++) {
109  AVStream *st = s->streams[i];
110  if (aiff->audio_stream_idx < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
111  aiff->audio_stream_idx = i;
112  } else if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
113  av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in AIFF.\n");
114  return AVERROR(EINVAL);
115  }
116  }
117  if (aiff->audio_stream_idx < 0) {
118  av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
119  return AVERROR(EINVAL);
120  }
121 
122  enc = s->streams[aiff->audio_stream_idx]->codec;
123 
124  /* First verify if format is ok */
125  if (!enc->codec_tag)
126  return -1;
127  if (enc->codec_tag != MKTAG('N','O','N','E'))
128  aifc = 1;
129 
130  /* FORM AIFF header */
131  ffio_wfourcc(pb, "FORM");
132  aiff->form = avio_tell(pb);
133  avio_wb32(pb, 0); /* file length */
134  ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");
135 
136  if (aifc) { // compressed audio
137  if (!enc->block_align) {
138  av_log(s, AV_LOG_ERROR, "block align not set\n");
139  return -1;
140  }
141  /* Version chunk */
142  ffio_wfourcc(pb, "FVER");
143  avio_wb32(pb, 4);
144  avio_wb32(pb, 0xA2805140);
145  }
146 
147  if (enc->channels > 2 && enc->channel_layout) {
148  ffio_wfourcc(pb, "CHAN");
149  avio_wb32(pb, 12);
151  }
152 
153  put_meta(s, "title", MKTAG('N', 'A', 'M', 'E'));
154  put_meta(s, "author", MKTAG('A', 'U', 'T', 'H'));
155  put_meta(s, "copyright", MKTAG('(', 'c', ')', ' '));
156  put_meta(s, "comment", MKTAG('A', 'N', 'N', 'O'));
157 
158  /* Common chunk */
159  ffio_wfourcc(pb, "COMM");
160  avio_wb32(pb, aifc ? 24 : 18); /* size */
161  avio_wb16(pb, enc->channels); /* Number of channels */
162 
163  aiff->frames = avio_tell(pb);
164  avio_wb32(pb, 0); /* Number of frames */
165 
166  if (!enc->bits_per_coded_sample)
168  if (!enc->bits_per_coded_sample) {
169  av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
170  return -1;
171  }
172  if (!enc->block_align)
173  enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3;
174 
175  avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */
176 
177  sample_rate = av_double2int(enc->sample_rate);
178  avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
179  avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);
180 
181  if (aifc) {
182  avio_wl32(pb, enc->codec_tag);
183  avio_wb16(pb, 0);
184  }
185 
186  if (enc->codec_tag == MKTAG('Q','D','M','2') && enc->extradata_size) {
187  ffio_wfourcc(pb, "wave");
188  avio_wb32(pb, enc->extradata_size);
189  avio_write(pb, enc->extradata, enc->extradata_size);
190  }
191 
192  /* Sound data chunk */
193  ffio_wfourcc(pb, "SSND");
194  aiff->ssnd = avio_tell(pb); /* Sound chunk size */
195  avio_wb32(pb, 0); /* Sound samples data size */
196  avio_wb32(pb, 0); /* Data offset */
197  avio_wb32(pb, 0); /* Block-size (block align) */
198 
201 
202  /* Data is starting here */
203  avio_flush(pb);
204 
205  return 0;
206 }
207 
209 {
210  AIFFOutputContext *aiff = s->priv_data;
211  AVIOContext *pb = s->pb;
212  if (pkt->stream_index == aiff->audio_stream_idx)
213  avio_write(pb, pkt->data, pkt->size);
214  else {
215  int ret;
216  AVPacketList *pict_list, *last;
217 
219  return 0;
220 
221  /* warn only once for each stream */
222  if (s->streams[pkt->stream_index]->nb_frames == 1) {
223  av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
224  " ignoring.\n", pkt->stream_index);
225  }
226  if (s->streams[pkt->stream_index]->nb_frames >= 1)
227  return 0;
228 
229  pict_list = av_mallocz(sizeof(AVPacketList));
230  if (!pict_list)
231  return AVERROR(ENOMEM);
232 
233  if ((ret = av_copy_packet(&pict_list->pkt, pkt)) < 0) {
234  av_freep(&pict_list);
235  return ret;
236  }
237 
238  if (!aiff->pict_list)
239  aiff->pict_list = pict_list;
240  else {
241  last = aiff->pict_list;
242  while (last->next)
243  last = last->next;
244  last->next = pict_list;
245  }
246  }
247 
248  return 0;
249 }
250 
252 {
253  int ret;
254  AVIOContext *pb = s->pb;
255  AIFFOutputContext *aiff = s->priv_data;
256  AVPacketList *pict_list = aiff->pict_list;
257  AVCodecContext *enc = s->streams[aiff->audio_stream_idx]->codec;
258 
259  /* Chunks sizes must be even */
260  int64_t file_size, end_size;
261  end_size = file_size = avio_tell(pb);
262  if (file_size & 1) {
263  avio_w8(pb, 0);
264  end_size++;
265  }
266 
267  if (s->pb->seekable) {
268  /* Number of sample frames */
269  avio_seek(pb, aiff->frames, SEEK_SET);
270  avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
271 
272  /* Sound Data chunk size */
273  avio_seek(pb, aiff->ssnd, SEEK_SET);
274  avio_wb32(pb, file_size - aiff->ssnd - 4);
275 
276  /* return to the end */
277  avio_seek(pb, end_size, SEEK_SET);
278 
279  /* Write ID3 tags */
280  if (aiff->write_id3v2)
281  if ((ret = put_id3v2_tags(s, aiff)) < 0)
282  return ret;
283 
284  /* File length */
285  file_size = avio_tell(pb);
286  avio_seek(pb, aiff->form, SEEK_SET);
287  avio_wb32(pb, file_size - aiff->form - 4);
288 
289  avio_flush(pb);
290  }
291 
292  while (pict_list) {
293  AVPacketList *next = pict_list->next;
294  av_free_packet(&pict_list->pkt);
295  av_freep(&pict_list);
296  pict_list = next;
297  }
298 
299  return 0;
300 }
301 
302 #define OFFSET(x) offsetof(AIFFOutputContext, x)
303 #define ENC AV_OPT_FLAG_ENCODING_PARAM
304 static const AVOption options[] = {
305  { "write_id3v2", "Enable ID3 tags writing.",
306  OFFSET(write_id3v2), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, ENC },
307  { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
308  OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, ENC },
309  { NULL },
310 };
311 
312 static const AVClass aiff_muxer_class = {
313  .class_name = "AIFF muxer",
314  .item_name = av_default_item_name,
315  .option = options,
316  .version = LIBAVUTIL_VERSION_INT,
317 };
318 
320  .name = "aiff",
321  .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
322  .mime_type = "audio/aiff",
323  .extensions = "aif,aiff,afc,aifc",
324  .priv_data_size = sizeof(AIFFOutputContext),
325  .audio_codec = AV_CODEC_ID_PCM_S16BE,
326  .video_codec = AV_CODEC_ID_PNG,
330  .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
331  .priv_class = &aiff_muxer_class,
332 };