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 <stdint.h>
23
24 #include "libavutil/intfloat.h"
25 #include "libavutil/opt.h"
26 #include "avformat.h"
27 #include "internal.h"
28 #include "aiff.h"
29 #include "avio_internal.h"
30 #include "isom.h"
31 #include "id3v2.h"
32
33 typedef struct {
34 const AVClass *class;
35 int64_t form;
36 int64_t frames;
37 int64_t ssnd;
38 int audio_stream_idx;
39 AVPacketList *pict_list;
40 int write_id3v2;
41 int id3v2_version;
42 } AIFFOutputContext;
43
put_id3v2_tags(AVFormatContext * s,AIFFOutputContext * aiff)44 static int put_id3v2_tags(AVFormatContext *s, AIFFOutputContext *aiff)
45 {
46 int ret;
47 uint64_t pos, end, size;
48 ID3v2EncContext id3v2 = { 0 };
49 AVIOContext *pb = s->pb;
50 AVPacketList *pict_list = aiff->pict_list;
51
52 if (!pb->seekable)
53 return 0;
54
55 if (!s->metadata && !aiff->pict_list)
56 return 0;
57
58 avio_wl32(pb, MKTAG('I', 'D', '3', ' '));
59 avio_wb32(pb, 0);
60 pos = avio_tell(pb);
61
62 ff_id3v2_start(&id3v2, pb, aiff->id3v2_version, ID3v2_DEFAULT_MAGIC);
63 ff_id3v2_write_metadata(s, &id3v2);
64 while (pict_list) {
65 if ((ret = ff_id3v2_write_apic(s, &id3v2, &pict_list->pkt)) < 0)
66 return ret;
67 pict_list = pict_list->next;
68 }
69 ff_id3v2_finish(&id3v2, pb, s->metadata_header_padding);
70
71 end = avio_tell(pb);
72 size = end - pos;
73
74 /* Update chunk size */
75 avio_seek(pb, pos - 4, SEEK_SET);
76 avio_wb32(pb, size);
77 avio_seek(pb, end, SEEK_SET);
78
79 if (size & 1)
80 avio_w8(pb, 0);
81
82 return 0;
83 }
84
put_meta(AVFormatContext * s,const char * key,uint32_t id)85 static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
86 {
87 AVDictionaryEntry *tag;
88 AVIOContext *pb = s->pb;
89
90 if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
91 int size = strlen(tag->value);
92
93 avio_wl32(pb, id);
94 avio_wb32(pb, FFALIGN(size, 2));
95 avio_write(pb, tag->value, size);
96 if (size & 1)
97 avio_w8(pb, 0);
98 }
99 }
100
aiff_write_header(AVFormatContext * s)101 static int aiff_write_header(AVFormatContext *s)
102 {
103 AIFFOutputContext *aiff = s->priv_data;
104 AVIOContext *pb = s->pb;
105 AVCodecContext *enc;
106 uint64_t sample_rate;
107 int i, aifc = 0;
108
109 aiff->audio_stream_idx = -1;
110 for (i = 0; i < s->nb_streams; i++) {
111 AVStream *st = s->streams[i];
112 if (aiff->audio_stream_idx < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
113 aiff->audio_stream_idx = i;
114 } else if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
115 av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in AIFF.\n");
116 return AVERROR(EINVAL);
117 }
118 }
119 if (aiff->audio_stream_idx < 0) {
120 av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
121 return AVERROR(EINVAL);
122 }
123
124 enc = s->streams[aiff->audio_stream_idx]->codec;
125
126 /* First verify if format is ok */
127 if (!enc->codec_tag)
128 return -1;
129 if (enc->codec_tag != MKTAG('N','O','N','E'))
130 aifc = 1;
131
132 /* FORM AIFF header */
133 ffio_wfourcc(pb, "FORM");
134 aiff->form = avio_tell(pb);
135 avio_wb32(pb, 0); /* file length */
136 ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");
137
138 if (aifc) { // compressed audio
139 if (!enc->block_align) {
140 av_log(s, AV_LOG_ERROR, "block align not set\n");
141 return -1;
142 }
143 /* Version chunk */
144 ffio_wfourcc(pb, "FVER");
145 avio_wb32(pb, 4);
146 avio_wb32(pb, 0xA2805140);
147 }
148
149 if (enc->channels > 2 && enc->channel_layout) {
150 ffio_wfourcc(pb, "CHAN");
151 avio_wb32(pb, 12);
152 ff_mov_write_chan(pb, enc->channel_layout);
153 }
154
155 put_meta(s, "title", MKTAG('N', 'A', 'M', 'E'));
156 put_meta(s, "author", MKTAG('A', 'U', 'T', 'H'));
157 put_meta(s, "copyright", MKTAG('(', 'c', ')', ' '));
158 put_meta(s, "comment", MKTAG('A', 'N', 'N', 'O'));
159
160 /* Common chunk */
161 ffio_wfourcc(pb, "COMM");
162 avio_wb32(pb, aifc ? 24 : 18); /* size */
163 avio_wb16(pb, enc->channels); /* Number of channels */
164
165 aiff->frames = avio_tell(pb);
166 avio_wb32(pb, 0); /* Number of frames */
167
168 if (!enc->bits_per_coded_sample)
169 enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id);
170 if (!enc->bits_per_coded_sample) {
171 av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
172 return -1;
173 }
174 if (!enc->block_align)
175 enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3;
176
177 avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */
178
179 sample_rate = av_double2int(enc->sample_rate);
180 avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
181 avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);
182
183 if (aifc) {
184 avio_wl32(pb, enc->codec_tag);
185 avio_wb16(pb, 0);
186 }
187
188 if (enc->codec_tag == MKTAG('Q','D','M','2') && enc->extradata_size) {
189 ffio_wfourcc(pb, "wave");
190 avio_wb32(pb, enc->extradata_size);
191 avio_write(pb, enc->extradata, enc->extradata_size);
192 }
193
194 /* Sound data chunk */
195 ffio_wfourcc(pb, "SSND");
196 aiff->ssnd = avio_tell(pb); /* Sound chunk size */
197 avio_wb32(pb, 0); /* Sound samples data size */
198 avio_wb32(pb, 0); /* Data offset */
199 avio_wb32(pb, 0); /* Block-size (block align) */
200
201 avpriv_set_pts_info(s->streams[aiff->audio_stream_idx], 64, 1,
202 s->streams[aiff->audio_stream_idx]->codec->sample_rate);
203
204 /* Data is starting here */
205 avio_flush(pb);
206
207 return 0;
208 }
209
aiff_write_packet(AVFormatContext * s,AVPacket * pkt)210 static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
211 {
212 AIFFOutputContext *aiff = s->priv_data;
213 AVIOContext *pb = s->pb;
214 if (pkt->stream_index == aiff->audio_stream_idx)
215 avio_write(pb, pkt->data, pkt->size);
216 else {
217 int ret;
218 AVPacketList *pict_list, *last;
219
220 if (s->streams[pkt->stream_index]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
221 return 0;
222
223 /* warn only once for each stream */
224 if (s->streams[pkt->stream_index]->nb_frames == 1) {
225 av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
226 " ignoring.\n", pkt->stream_index);
227 }
228 if (s->streams[pkt->stream_index]->nb_frames >= 1)
229 return 0;
230
231 pict_list = av_mallocz(sizeof(AVPacketList));
232 if (!pict_list)
233 return AVERROR(ENOMEM);
234
235 if ((ret = av_copy_packet(&pict_list->pkt, pkt)) < 0) {
236 av_freep(&pict_list);
237 return ret;
238 }
239
240 if (!aiff->pict_list)
241 aiff->pict_list = pict_list;
242 else {
243 last = aiff->pict_list;
244 while (last->next)
245 last = last->next;
246 last->next = pict_list;
247 }
248 }
249
250 return 0;
251 }
252
aiff_write_trailer(AVFormatContext * s)253 static int aiff_write_trailer(AVFormatContext *s)
254 {
255 int ret;
256 AVIOContext *pb = s->pb;
257 AIFFOutputContext *aiff = s->priv_data;
258 AVPacketList *pict_list = aiff->pict_list;
259 AVCodecContext *enc = s->streams[aiff->audio_stream_idx]->codec;
260
261 /* Chunks sizes must be even */
262 int64_t file_size, end_size;
263 end_size = file_size = avio_tell(pb);
264 if (file_size & 1) {
265 avio_w8(pb, 0);
266 end_size++;
267 }
268
269 if (s->pb->seekable) {
270 /* Number of sample frames */
271 avio_seek(pb, aiff->frames, SEEK_SET);
272 avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
273
274 /* Sound Data chunk size */
275 avio_seek(pb, aiff->ssnd, SEEK_SET);
276 avio_wb32(pb, file_size - aiff->ssnd - 4);
277
278 /* return to the end */
279 avio_seek(pb, end_size, SEEK_SET);
280
281 /* Write ID3 tags */
282 if (aiff->write_id3v2)
283 if ((ret = put_id3v2_tags(s, aiff)) < 0)
284 return ret;
285
286 /* File length */
287 file_size = avio_tell(pb);
288 avio_seek(pb, aiff->form, SEEK_SET);
289 avio_wb32(pb, file_size - aiff->form - 4);
290
291 avio_flush(pb);
292 }
293
294 while (pict_list) {
295 AVPacketList *next = pict_list->next;
296 av_free_packet(&pict_list->pkt);
297 av_freep(&pict_list);
298 pict_list = next;
299 }
300
301 return 0;
302 }
303
304 #define OFFSET(x) offsetof(AIFFOutputContext, x)
305 #define ENC AV_OPT_FLAG_ENCODING_PARAM
306 static const AVOption options[] = {
307 { "write_id3v2", "Enable ID3 tags writing.",
308 OFFSET(write_id3v2), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, ENC },
309 { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
310 OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, ENC },
311 { NULL },
312 };
313
314 static const AVClass aiff_muxer_class = {
315 .class_name = "AIFF muxer",
316 .item_name = av_default_item_name,
317 .option = options,
318 .version = LIBAVUTIL_VERSION_INT,
319 };
320
321 AVOutputFormat ff_aiff_muxer = {
322 .name = "aiff",
323 .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
324 .mime_type = "audio/aiff",
325 .extensions = "aif,aiff,afc,aifc",
326 .priv_data_size = sizeof(AIFFOutputContext),
327 .audio_codec = AV_CODEC_ID_PCM_S16BE,
328 .video_codec = AV_CODEC_ID_PNG,
329 .write_header = aiff_write_header,
330 .write_packet = aiff_write_packet,
331 .write_trailer = aiff_write_trailer,
332 .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
333 .priv_class = &aiff_muxer_class,
334 };
335