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 "libavcodec/packet_internal.h"
27 #include "avformat.h"
28 #include "internal.h"
29 #include "aiff.h"
30 #include "avio_internal.h"
31 #include "isom.h"
32 #include "id3v2.h"
33
34 typedef struct AIFFOutputContext {
35 const AVClass *class;
36 int64_t form;
37 int64_t frames;
38 int64_t ssnd;
39 int audio_stream_idx;
40 PacketList *pict_list, *pict_list_end;
41 int write_id3v2;
42 int id3v2_version;
43 } AIFFOutputContext;
44
put_id3v2_tags(AVFormatContext * s,AIFFOutputContext * aiff)45 static int put_id3v2_tags(AVFormatContext *s, AIFFOutputContext *aiff)
46 {
47 int ret;
48 uint64_t pos, end, size;
49 ID3v2EncContext id3v2 = { 0 };
50 AVIOContext *pb = s->pb;
51 PacketList *pict_list = aiff->pict_list;
52
53 if (!s->metadata && !s->nb_chapters && !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
60 ff_id3v2_start(&id3v2, pb, aiff->id3v2_version, ID3v2_DEFAULT_MAGIC);
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, s->metadata_header_padding);
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
put_meta(AVFormatContext * s,const char * key,uint32_t id)83 static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
84 {
85 AVDictionaryEntry *tag;
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
aiff_write_header(AVFormatContext * s)99 static int aiff_write_header(AVFormatContext *s)
100 {
101 AIFFOutputContext *aiff = s->priv_data;
102 AVIOContext *pb = s->pb;
103 AVCodecParameters *par;
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->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
111 aiff->audio_stream_idx = i;
112 } else if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO) {
113 av_log(s, AV_LOG_ERROR, "AIFF allows only one audio stream and a picture.\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 par = s->streams[aiff->audio_stream_idx]->codecpar;
123
124 /* First verify if format is ok */
125 if (!par->codec_tag)
126 return AVERROR(EINVAL);
127 if (par->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 (!par->block_align) {
138 av_log(s, AV_LOG_ERROR, "block align not set\n");
139 return AVERROR(EINVAL);
140 }
141 /* Version chunk */
142 ffio_wfourcc(pb, "FVER");
143 avio_wb32(pb, 4);
144 avio_wb32(pb, 0xA2805140);
145 }
146
147 if (par->channels > 2 && par->channel_layout) {
148 ffio_wfourcc(pb, "CHAN");
149 avio_wb32(pb, 12);
150 ff_mov_write_chan(pb, par->channel_layout);
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, par->channels); /* Number of channels */
162
163 aiff->frames = avio_tell(pb);
164 avio_wb32(pb, 0); /* Number of frames */
165
166 if (!par->bits_per_coded_sample)
167 par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id);
168 if (!par->bits_per_coded_sample) {
169 av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
170 return AVERROR(EINVAL);
171 }
172 if (!par->block_align)
173 par->block_align = (par->bits_per_coded_sample * par->channels) >> 3;
174
175 avio_wb16(pb, par->bits_per_coded_sample); /* Sample size */
176
177 sample_rate = av_double2int(par->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, par->codec_tag);
183 avio_wb16(pb, 0);
184 }
185
186 if ( (par->codec_tag == MKTAG('Q','D','M','2')
187 || par->codec_tag == MKTAG('Q','c','l','p')) && par->extradata_size) {
188 ffio_wfourcc(pb, "wave");
189 avio_wb32(pb, par->extradata_size);
190 avio_write(pb, par->extradata, par->extradata_size);
191 }
192
193 /* Sound data chunk */
194 ffio_wfourcc(pb, "SSND");
195 aiff->ssnd = avio_tell(pb); /* Sound chunk size */
196 avio_wb32(pb, 0); /* Sound samples data size */
197 avio_wb32(pb, 0); /* Data offset */
198 avio_wb32(pb, 0); /* Block-size (block align) */
199
200 avpriv_set_pts_info(s->streams[aiff->audio_stream_idx], 64, 1,
201 s->streams[aiff->audio_stream_idx]->codecpar->sample_rate);
202
203 return 0;
204 }
205
aiff_write_packet(AVFormatContext * s,AVPacket * pkt)206 static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
207 {
208 AIFFOutputContext *aiff = s->priv_data;
209 AVIOContext *pb = s->pb;
210 if (pkt->stream_index == aiff->audio_stream_idx)
211 avio_write(pb, pkt->data, pkt->size);
212 else {
213 if (s->streams[pkt->stream_index]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
214 return 0;
215
216 /* warn only once for each stream */
217 if (s->streams[pkt->stream_index]->nb_frames == 1) {
218 av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
219 " ignoring.\n", pkt->stream_index);
220 }
221 if (s->streams[pkt->stream_index]->nb_frames >= 1)
222 return 0;
223
224 return avpriv_packet_list_put(&aiff->pict_list, &aiff->pict_list_end,
225 pkt, av_packet_ref, 0);
226 }
227
228 return 0;
229 }
230
aiff_write_trailer(AVFormatContext * s)231 static int aiff_write_trailer(AVFormatContext *s)
232 {
233 int ret = 0;
234 AVIOContext *pb = s->pb;
235 AIFFOutputContext *aiff = s->priv_data;
236 AVCodecParameters *par = s->streams[aiff->audio_stream_idx]->codecpar;
237
238 /* Chunks sizes must be even */
239 int64_t file_size, end_size;
240 end_size = file_size = avio_tell(pb);
241 if (file_size & 1) {
242 avio_w8(pb, 0);
243 end_size++;
244 }
245
246 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
247 /* Number of sample frames */
248 avio_seek(pb, aiff->frames, SEEK_SET);
249 avio_wb32(pb, (file_size - aiff->ssnd - 12) / par->block_align);
250
251 /* Sound Data chunk size */
252 avio_seek(pb, aiff->ssnd, SEEK_SET);
253 avio_wb32(pb, file_size - aiff->ssnd - 4);
254
255 /* return to the end */
256 avio_seek(pb, end_size, SEEK_SET);
257
258 /* Write ID3 tags */
259 if (aiff->write_id3v2)
260 if ((ret = put_id3v2_tags(s, aiff)) < 0)
261 return ret;
262
263 /* File length */
264 file_size = avio_tell(pb);
265 avio_seek(pb, aiff->form, SEEK_SET);
266 avio_wb32(pb, file_size - aiff->form - 4);
267 }
268
269 return ret;
270 }
271
aiff_deinit(AVFormatContext * s)272 static void aiff_deinit(AVFormatContext *s)
273 {
274 AIFFOutputContext *aiff = s->priv_data;
275
276 avpriv_packet_list_free(&aiff->pict_list, &aiff->pict_list_end);
277 }
278
279 #define OFFSET(x) offsetof(AIFFOutputContext, x)
280 #define ENC AV_OPT_FLAG_ENCODING_PARAM
281 static const AVOption options[] = {
282 { "write_id3v2", "Enable ID3 tags writing.",
283 OFFSET(write_id3v2), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, ENC },
284 { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
285 OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, ENC },
286 { NULL },
287 };
288
289 static const AVClass aiff_muxer_class = {
290 .class_name = "AIFF muxer",
291 .item_name = av_default_item_name,
292 .option = options,
293 .version = LIBAVUTIL_VERSION_INT,
294 };
295
296 AVOutputFormat ff_aiff_muxer = {
297 .name = "aiff",
298 .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
299 .mime_type = "audio/aiff",
300 .extensions = "aif,aiff,afc,aifc",
301 .priv_data_size = sizeof(AIFFOutputContext),
302 .audio_codec = AV_CODEC_ID_PCM_S16BE,
303 .video_codec = AV_CODEC_ID_PNG,
304 .write_header = aiff_write_header,
305 .write_packet = aiff_write_packet,
306 .write_trailer = aiff_write_trailer,
307 .deinit = aiff_deinit,
308 .codec_tag = ff_aiff_codec_tags_list,
309 .priv_class = &aiff_muxer_class,
310 };
311