2 * AIFF/AIFF-C muxer and demuxer
3 * Copyright (c) 2006 Patrick Guimond
5 * This file is part of FFmpeg.
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.
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.
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
24 #include "intfloat_readwrite.h"
26 static const AVCodecTag codec_aiff_tags[] = {
27 { CODEC_ID_PCM_S16BE, MKTAG('N','O','N','E') },
28 { CODEC_ID_PCM_S8, MKTAG('N','O','N','E') },
29 { CODEC_ID_PCM_S24BE, MKTAG('N','O','N','E') },
30 { CODEC_ID_PCM_S32BE, MKTAG('N','O','N','E') },
31 { CODEC_ID_PCM_ALAW, MKTAG('a','l','a','w') },
32 { CODEC_ID_PCM_MULAW, MKTAG('u','l','a','w') },
33 { CODEC_ID_MACE3, MKTAG('M','A','C','3') },
34 { CODEC_ID_MACE6, MKTAG('M','A','C','6') },
35 { CODEC_ID_GSM, MKTAG('G','S','M',' ') },
36 { CODEC_ID_ADPCM_G726, MKTAG('G','7','2','6') },
37 { CODEC_ID_PCM_S16LE, MKTAG('s','o','w','t') },
38 { CODEC_ID_ADPCM_IMA_QT, MKTAG('i','m','a','4') },
43 #define AIFF_C_VERSION1 0xA2805140
45 static int aiff_codec_get_id (int bps)
48 return CODEC_ID_PCM_S8;
50 return CODEC_ID_PCM_S16BE;
52 return CODEC_ID_PCM_S24BE;
54 return CODEC_ID_PCM_S32BE;
56 /* bigger than 32 isn't allowed */
60 /* returns the size of the found tag */
61 static int get_tag(ByteIOContext *pb, uint32_t * tag)
77 /* Metadata string read */
78 static void get_meta(ByteIOContext *pb, char * str, int strsize, int size)
83 res = get_buffer(pb, (uint8_t*)str, strsize-1);
85 res = get_buffer(pb, (uint8_t*)str, size);
98 /* Returns the number of sound data frames or negative on error */
99 static unsigned int get_aiff_header(ByteIOContext *pb, AVCodecContext *codec,
100 int size, unsigned version)
104 unsigned int num_frames;
108 codec->codec_type = CODEC_TYPE_AUDIO;
109 codec->channels = get_be16(pb);
110 num_frames = get_be32(pb);
111 codec->bits_per_sample = get_be16(pb);
113 get_buffer(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */
114 sample_rate = av_ext2dbl(ext); /* 80 bits BE IEEE extended float */
115 codec->sample_rate = sample_rate;
119 if (version == AIFF_C_VERSION1) {
120 codec->codec_tag = get_le32(pb);
121 codec->codec_id = codec_get_id(codec_aiff_tags, codec->codec_tag);
123 switch (codec->codec_id) {
124 case CODEC_ID_PCM_S16BE:
125 codec->codec_id = aiff_codec_get_id(codec->bits_per_sample);
126 codec->bits_per_sample = av_get_bits_per_sample(codec->codec_id);
128 case CODEC_ID_ADPCM_IMA_QT:
129 codec->block_align = 34*codec->channels;
130 codec->frame_size = 64;
137 /* Need the codec type */
138 codec->codec_id = aiff_codec_get_id(codec->bits_per_sample);
139 codec->bits_per_sample = av_get_bits_per_sample(codec->codec_id);
142 if (!codec->codec_id)
143 return AVERROR_INVALIDDATA;
145 /* Block align needs to be computed in all cases, as the definition
146 * is specific to applications -> here we use the WAVE format definition */
147 if (!codec->block_align)
148 codec->block_align = (codec->bits_per_sample * codec->channels) >> 3;
150 codec->bit_rate = codec->sample_rate * (codec->block_align << 3);
154 url_fseek(pb, size, SEEK_CUR);
166 static int aiff_write_header(AVFormatContext *s)
168 AIFFOutputContext *aiff = s->priv_data;
169 ByteIOContext *pb = s->pb;
170 AVCodecContext *enc = s->streams[0]->codec;
171 AVExtFloat sample_rate;
174 /* First verify if format is ok */
177 if (enc->codec_tag != MKTAG('N','O','N','E'))
180 /* FORM AIFF header */
182 aiff->form = url_ftell(pb);
183 put_be32(pb, 0); /* file length */
184 put_tag(pb, aifc ? "AIFC" : "AIFF");
186 if (aifc) { // compressed audio
187 enc->bits_per_sample = 16;
188 if (!enc->block_align) {
189 av_log(s, AV_LOG_ERROR, "block align not set\n");
195 put_be32(pb, 0xA2805140);
200 put_be32(pb, aifc ? 24 : 18); /* size */
201 put_be16(pb, enc->channels); /* Number of channels */
203 aiff->frames = url_ftell(pb);
204 put_be32(pb, 0); /* Number of frames */
206 if (!enc->bits_per_sample)
207 enc->bits_per_sample = av_get_bits_per_sample(enc->codec_id);
208 if (!enc->bits_per_sample) {
209 av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
212 if (!enc->block_align)
213 enc->block_align = (enc->bits_per_sample * enc->channels) >> 3;
215 put_be16(pb, enc->bits_per_sample); /* Sample size */
217 sample_rate = av_dbl2ext((double)enc->sample_rate);
218 put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));
221 put_le32(pb, enc->codec_tag);
225 /* Sound data chunk */
227 aiff->ssnd = url_ftell(pb); /* Sound chunk size */
228 put_be32(pb, 0); /* Sound samples data size */
229 put_be32(pb, 0); /* Data offset */
230 put_be32(pb, 0); /* Block-size (block align) */
232 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
234 /* Data is starting here */
235 put_flush_packet(pb);
240 static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
242 ByteIOContext *pb = s->pb;
243 put_buffer(pb, pkt->data, pkt->size);
247 static int aiff_write_trailer(AVFormatContext *s)
249 ByteIOContext *pb = s->pb;
250 AIFFOutputContext *aiff = s->priv_data;
251 AVCodecContext *enc = s->streams[0]->codec;
253 /* Chunks sizes must be even */
254 offset_t file_size, end_size;
255 end_size = file_size = url_ftell(pb);
261 if (!url_is_streamed(s->pb)) {
263 url_fseek(pb, aiff->form, SEEK_SET);
264 put_be32(pb, file_size - aiff->form - 4);
266 /* Number of sample frames */
267 url_fseek(pb, aiff->frames, SEEK_SET);
268 put_be32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
270 /* Sound Data chunk size */
271 url_fseek(pb, aiff->ssnd, SEEK_SET);
272 put_be32(pb, file_size - aiff->ssnd - 4);
274 /* return to the end */
275 url_fseek(pb, end_size, SEEK_SET);
277 put_flush_packet(pb);
282 #endif //CONFIG_MUXERS
284 static int aiff_probe(AVProbeData *p)
286 /* check file header */
287 if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
288 p->buf[2] == 'R' && p->buf[3] == 'M' &&
289 p->buf[8] == 'A' && p->buf[9] == 'I' &&
290 p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
291 return AVPROBE_SCORE_MAX;
297 static int aiff_read_header(AVFormatContext *s,
298 AVFormatParameters *ap)
303 unsigned version = AIFF_C_VERSION1;
304 ByteIOContext *pb = s->pb;
305 AVStream * st = s->streams[0];
307 /* check FORM header */
308 filesize = get_tag(pb, &tag);
309 if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
310 return AVERROR_INVALIDDATA;
314 if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
316 else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
317 return AVERROR_INVALIDDATA;
321 st = av_new_stream(s, 0);
323 return AVERROR(ENOMEM);
325 while (filesize > 0) {
326 /* parse different chunks */
327 size = get_tag(pb, &tag);
331 filesize -= size + 8;
334 case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
335 /* Then for the complete header info */
336 st->nb_frames = get_aiff_header (pb, st->codec, size, version);
337 if (st->nb_frames < 0)
338 return st->nb_frames;
339 if (offset > 0) // COMM is after SSND
342 case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
343 version = get_be32(pb);
345 case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
346 get_meta (pb, s->title, sizeof(s->title), size);
348 case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
349 get_meta (pb, s->author, sizeof(s->author), size);
351 case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
352 get_meta (pb, s->copyright, sizeof(s->copyright), size);
354 case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
355 get_meta (pb, s->comment, sizeof(s->comment), size);
357 case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
358 offset = get_be32(pb); /* Offset of sound data */
359 get_be32(pb); /* BlockSize... don't care */
360 offset += url_ftell(pb); /* Compute absolute data offset */
361 if (st->codec->codec_id) /* Assume COMM already parsed */
363 if (url_is_streamed(pb)) {
364 av_log(s, AV_LOG_ERROR, "file is not seekable\n");
367 url_fskip(pb, size - 8);
370 if (size & 1) /* Always even aligned */
372 url_fskip (pb, size);
376 /* End of loop and didn't get sound */
377 return AVERROR_INVALIDDATA;
380 /* Now positioned, get the sound data start and end */
382 s->file_size = st->nb_frames * st->codec->block_align;
384 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
386 st->duration = st->codec->frame_size ?
387 st->nb_frames * st->codec->frame_size : st->nb_frames;
389 /* Position the stream at the first block */
390 url_fseek(pb, offset, SEEK_SET);
395 #define MAX_SIZE 4096
397 static int aiff_read_packet(AVFormatContext *s,
400 AVStream *st = s->streams[0];
403 /* End of stream may be reached */
407 /* Now for that packet */
408 res = av_get_packet(s->pb, pkt, (MAX_SIZE / st->codec->block_align) * st->codec->block_align);
412 /* Only one stream in an AIFF file */
413 pkt->stream_index = 0;
417 static int aiff_read_seek(AVFormatContext *s,
418 int stream_index, int64_t timestamp, int flags)
420 return pcm_read_seek(s, stream_index, timestamp, flags);
423 #ifdef CONFIG_AIFF_DEMUXER
424 AVInputFormat aiff_demuxer = {
433 .codec_tag= (const AVCodecTag*[]){codec_aiff_tags, 0},
437 #ifdef CONFIG_AIFF_MUXER
438 AVOutputFormat aiff_muxer = {
443 sizeof(AIFFOutputContext),
449 .codec_tag= (const AVCodecTag*[]){codec_aiff_tags, 0},