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_ALAW, MKTAG('A','L','A','W') },
33 { CODEC_ID_PCM_MULAW, MKTAG('u','l','a','w') },
34 { CODEC_ID_PCM_MULAW, MKTAG('U','L','A','W') },
35 { CODEC_ID_MACE3, MKTAG('M','A','C','3') },
36 { CODEC_ID_MACE6, MKTAG('M','A','C','6') },
37 { CODEC_ID_GSM, MKTAG('G','S','M',' ') },
38 { CODEC_ID_ADPCM_G726, MKTAG('G','7','2','6') },
39 { CODEC_ID_PCM_S16LE, MKTAG('s','o','w','t') },
40 { CODEC_ID_ADPCM_IMA_QT, MKTAG('i','m','a','4') },
45 #define AIFF_C_VERSION1 0xA2805140
47 static int aiff_codec_get_id (int bps)
50 return CODEC_ID_PCM_S8;
52 return CODEC_ID_PCM_S16BE;
54 return CODEC_ID_PCM_S24BE;
56 return CODEC_ID_PCM_S32BE;
58 /* bigger than 32 isn't allowed */
62 /* returns the size of the found tag */
63 static int get_tag(ByteIOContext *pb, uint32_t * tag)
79 /* Metadata string read */
80 static void get_meta(ByteIOContext *pb, char * str, int strsize, int size)
85 res = get_buffer(pb, (uint8_t*)str, strsize-1);
87 res = get_buffer(pb, (uint8_t*)str, size);
100 /* Returns the number of sound data frames or negative on error */
101 static unsigned int get_aiff_header(ByteIOContext *pb, AVCodecContext *codec,
102 int size, unsigned version)
106 unsigned int num_frames;
112 codec->codec_type = CODEC_TYPE_AUDIO;
113 codec->channels = get_be16(pb);
114 num_frames = get_be32(pb);
115 codec->bits_per_sample = get_be16(pb);
117 get_buffer(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */
118 sample_rate = av_ext2dbl(ext); /* 80 bits BE IEEE extended float */
119 codec->sample_rate = sample_rate;
123 if (version == AIFF_C_VERSION1) {
124 codec->codec_tag = get_le32(pb);
125 codec->codec_id = codec_get_id (codec_aiff_tags, codec->codec_tag);
127 switch (codec->codec_id) {
128 case CODEC_ID_PCM_S16BE:
129 codec->codec_id = aiff_codec_get_id (codec->bits_per_sample);
130 codec->bits_per_sample = av_get_bits_per_sample(codec->codec_id);
132 case CODEC_ID_ADPCM_IMA_QT:
133 codec->block_align = 34*codec->channels;
134 codec->frame_size = 64;
141 /* Need the codec type */
142 codec->codec_id = aiff_codec_get_id (codec->bits_per_sample);
143 codec->bits_per_sample = av_get_bits_per_sample(codec->codec_id);
146 if (!codec->codec_id)
147 return AVERROR_INVALIDDATA;
149 /* Block align needs to be computed in all cases, as the definition
150 * is specific to applications -> here we use the WAVE format definition */
151 if (!codec->block_align)
152 codec->block_align = (codec->bits_per_sample * codec->channels) >> 3;
154 codec->bit_rate = codec->sample_rate * (codec->block_align << 3);
158 url_fseek(pb, size, SEEK_CUR);
170 static int aiff_write_header(AVFormatContext *s)
172 AIFFOutputContext *aiff = s->priv_data;
173 ByteIOContext *pb = s->pb;
174 AVCodecContext *enc = s->streams[0]->codec;
175 AVExtFloat sample_rate;
178 /* First verify if format is ok */
179 if (!enc->codec_tag) {
183 if (enc->codec_tag != MKTAG('N','O','N','E'))
186 /* FORM AIFF header */
188 aiff->form = url_ftell(pb);
189 put_be32(pb, 0); /* file length */
190 put_tag(pb, aifc ? "AIFC" : "AIFF");
192 if (aifc) { // compressed audio
193 enc->bits_per_sample = 16;
194 if (!enc->block_align) {
195 av_log(s, AV_LOG_ERROR, "block align not set\n");
201 put_be32(pb, 0xA2805140);
206 put_be32(pb, aifc ? 24 : 18); /* size */
207 put_be16(pb, enc->channels); /* Number of channels */
209 aiff->frames = url_ftell(pb);
210 put_be32(pb, 0); /* Number of frames */
212 if (!enc->bits_per_sample)
213 enc->bits_per_sample = av_get_bits_per_sample(enc->codec_id);
214 if (!enc->bits_per_sample) {
215 av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
218 if (!enc->block_align)
219 enc->block_align = (enc->bits_per_sample * enc->channels) >> 3;
221 put_be16(pb, enc->bits_per_sample); /* Sample size */
223 sample_rate = av_dbl2ext((double)enc->sample_rate);
224 put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));
227 put_le32(pb, enc->codec_tag);
231 /* Sound data chunk */
233 aiff->ssnd = url_ftell(pb); /* Sound chunk size */
234 put_be32(pb, 0); /* Sound samples data size */
235 put_be32(pb, 0); /* Data offset */
236 put_be32(pb, 0); /* Block-size (block align) */
238 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
240 /* Data is starting here */
241 put_flush_packet(pb);
246 static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
248 ByteIOContext *pb = s->pb;
249 put_buffer(pb, pkt->data, pkt->size);
253 static int aiff_write_trailer(AVFormatContext *s)
255 ByteIOContext *pb = s->pb;
256 AIFFOutputContext *aiff = s->priv_data;
257 AVCodecContext *enc = s->streams[0]->codec;
259 /* Chunks sizes must be even */
260 offset_t file_size, end_size;
261 end_size = file_size = url_ftell(pb);
267 if (!url_is_streamed(s->pb)) {
269 url_fseek(pb, aiff->form, SEEK_SET);
270 put_be32(pb, (uint32_t)(file_size - aiff->form - 4));
272 /* Number of sample frames */
273 url_fseek(pb, aiff->frames, SEEK_SET);
274 put_be32(pb, ((uint32_t)(file_size-aiff->ssnd-12))/enc->block_align);
276 /* Sound Data chunk size */
277 url_fseek(pb, aiff->ssnd, SEEK_SET);
278 put_be32(pb, (uint32_t)(file_size - aiff->ssnd - 4));
280 /* return to the end */
281 url_fseek(pb, end_size, SEEK_SET);
283 put_flush_packet(pb);
288 #endif //CONFIG_MUXERS
290 static int aiff_probe(AVProbeData *p)
292 /* check file header */
293 if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
294 p->buf[2] == 'R' && p->buf[3] == 'M' &&
295 p->buf[8] == 'A' && p->buf[9] == 'I' &&
296 p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
297 return AVPROBE_SCORE_MAX;
303 static int aiff_read_header(AVFormatContext *s,
304 AVFormatParameters *ap)
309 unsigned version = AIFF_C_VERSION1;
310 ByteIOContext *pb = s->pb;
311 AVStream * st = s->streams[0];
313 /* check FORM header */
314 filesize = get_tag(pb, &tag);
315 if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
316 return AVERROR_INVALIDDATA;
320 if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
322 else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
323 return AVERROR_INVALIDDATA;
327 st = av_new_stream(s, 0);
329 return AVERROR(ENOMEM);
331 while (filesize > 0) {
332 /* parse different chunks */
333 size = get_tag(pb, &tag);
337 filesize -= size + 8;
340 case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
341 /* Then for the complete header info */
342 st->nb_frames = get_aiff_header (pb, st->codec, size, version);
343 if (st->nb_frames < 0)
344 return st->nb_frames;
345 if (offset > 0) // COMM is after SSND
349 case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
350 version = get_be32(pb);
353 case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
354 get_meta (pb, s->title, sizeof(s->title), size);
357 case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
358 get_meta (pb, s->author, sizeof(s->author), size);
361 case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
362 get_meta (pb, s->copyright, sizeof(s->copyright), size);
365 case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
366 get_meta (pb, s->comment, sizeof(s->comment), size);
369 case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
370 offset = get_be32(pb); /* Offset of sound data */
371 get_be32(pb); /* BlockSize... don't care */
372 offset += url_ftell(pb); /* Compute absolute data offset */
373 if (st->codec->codec_id) /* Assume COMM already parsed */
375 if (url_is_streamed(pb)) {
376 av_log(s, AV_LOG_ERROR, "file is not seekable\n");
379 url_fskip(pb, size - 8);
383 if (size & 1) /* Always even aligned */
385 url_fskip (pb, size);
389 /* End of loop and didn't get sound */
390 return AVERROR_INVALIDDATA;
393 /* Now positioned, get the sound data start and end */
395 s->file_size = st->nb_frames * st->codec->block_align;
397 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
399 st->duration = st->codec->frame_size ?
400 st->nb_frames * st->codec->frame_size : st->nb_frames;
402 /* Position the stream at the first block */
403 url_fseek(pb, offset, SEEK_SET);
408 #define MAX_SIZE 4096
410 static int aiff_read_packet(AVFormatContext *s,
413 AVStream *st = s->streams[0];
416 /* End of stream may be reached */
420 /* Now for that packet */
421 res = av_get_packet(s->pb, pkt, (MAX_SIZE / st->codec->block_align) * st->codec->block_align);
425 /* Only one stream in an AIFF file */
426 pkt->stream_index = 0;
430 static int aiff_read_close(AVFormatContext *s)
435 static int aiff_read_seek(AVFormatContext *s,
436 int stream_index, int64_t timestamp, int flags)
438 return pcm_read_seek(s, stream_index, timestamp, flags);
441 #ifdef CONFIG_AIFF_DEMUXER
442 AVInputFormat aiff_demuxer = {
451 .codec_tag= (const AVCodecTag*[]){codec_aiff_tags, 0},
455 #ifdef CONFIG_AIFF_MUXER
456 AVOutputFormat aiff_muxer = {
461 sizeof(AIFFOutputContext),
467 .codec_tag= (const AVCodecTag*[]){codec_aiff_tags, 0},