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