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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 <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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | }; |