113
113
ff_mov_read_esds(s, pb, atom);
114
114
skip = size - (avio_tell(pb) - strt);
115
115
if (skip < 0 || !st->codec->extradata ||
116
st->codec->codec_id != CODEC_ID_AAC) {
116
st->codec->codec_id != AV_CODEC_ID_AAC) {
117
117
av_log(s, AV_LOG_ERROR, "invalid AAC magic cookie\n");
118
118
return AVERROR_INVALIDDATA;
120
120
avio_skip(pb, skip);
121
} else if (st->codec->codec_id == CODEC_ID_ALAC) {
121
} else if (st->codec->codec_id == AV_CODEC_ID_ALAC) {
122
122
#define ALAC_PREAMBLE 12
123
123
#define ALAC_HEADER 36
124
if (size < ALAC_PREAMBLE + ALAC_HEADER) {
124
#define ALAC_NEW_KUKI 24
125
uint8_t preamble[12];
126
if (size < ALAC_NEW_KUKI) {
125
127
av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
126
128
avio_skip(pb, size);
127
129
return AVERROR_INVALIDDATA;
129
avio_skip(pb, ALAC_PREAMBLE);
131
avio_read(pb, preamble, ALAC_PREAMBLE);
130
133
st->codec->extradata = av_mallocz(ALAC_HEADER + FF_INPUT_BUFFER_PADDING_SIZE);
131
134
if (!st->codec->extradata)
132
135
return AVERROR(ENOMEM);
133
avio_read(pb, st->codec->extradata, ALAC_HEADER);
137
/* For the old style cookie, we skip 12 bytes, then read 36 bytes.
138
* The new style cookie only contains the last 24 bytes of what was
139
* 36 bytes in the old style cookie, so we fabricate the first 12 bytes
140
* in that case to maintain compatibility. */
141
if (!memcmp(&preamble[4], "frmaalac", 8)) {
142
if (size < ALAC_PREAMBLE + ALAC_HEADER) {
143
av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
144
av_freep(&st->codec->extradata);
145
return AVERROR_INVALIDDATA;
147
avio_read(pb, st->codec->extradata, ALAC_HEADER);
148
avio_skip(pb, size - ALAC_PREAMBLE - ALAC_HEADER);
150
AV_WB32(st->codec->extradata, 36);
151
memcpy(&st->codec->extradata[4], "alac", 4);
152
AV_WB32(&st->codec->extradata[8], 0);
153
memcpy(&st->codec->extradata[12], preamble, 12);
154
avio_read(pb, &st->codec->extradata[24], ALAC_NEW_KUKI - 12);
155
avio_skip(pb, size - ALAC_NEW_KUKI);
134
157
st->codec->extradata_size = ALAC_HEADER;
135
avio_skip(pb, size - ALAC_PREAMBLE - ALAC_HEADER);
137
159
st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
138
160
if (!st->codec->extradata)
170
192
st->duration += caf->frames_per_packet ? caf->frames_per_packet : ff_mp4_read_descr_len(pb);
173
if (avio_tell(pb) - ccount != size) {
195
if (avio_tell(pb) - ccount > size) {
174
196
av_log(s, AV_LOG_ERROR, "error reading packet table\n");
197
return AVERROR_INVALIDDATA;
199
avio_skip(pb, ccount + size - avio_tell(pb));
178
201
caf->num_bytes = pos;
269
case MKBETAG('c','h','a','n'):
270
if ((ret = ff_mov_read_chan(s, s->pb, st, size)) < 0)
247
274
/* magic cookie chunk */
248
275
case MKBETAG('k','u','k','i'):
249
276
if (read_kuki_chunk(s, size))
368
395
pos = caf->bytes_per_packet * timestamp / caf->frames_per_packet;
369
396
if (caf->data_size > 0)
370
397
pos = FFMIN(pos, caf->data_size);
371
caf->packet_cnt = pos / caf->bytes_per_packet;
372
caf->frame_cnt = caf->frames_per_packet * caf->packet_cnt;
398
packet_cnt = pos / caf->bytes_per_packet;
399
frame_cnt = caf->frames_per_packet * packet_cnt;
373
400
} else if (st->nb_index_entries) {
374
caf->packet_cnt = av_index_search_timestamp(st, timestamp, flags);
375
caf->frame_cnt = st->index_entries[caf->packet_cnt].timestamp;
376
pos = st->index_entries[caf->packet_cnt].pos;
401
packet_cnt = av_index_search_timestamp(st, timestamp, flags);
402
frame_cnt = st->index_entries[packet_cnt].timestamp;
403
pos = st->index_entries[packet_cnt].pos;
381
avio_seek(s->pb, pos + caf->data_start, SEEK_SET);
408
if (avio_seek(s->pb, pos + caf->data_start, SEEK_SET) < 0)
411
caf->packet_cnt = packet_cnt;
412
caf->frame_cnt = frame_cnt;
385
417
AVInputFormat ff_caf_demuxer = {
387
.long_name = NULL_IF_CONFIG_SMALL("Apple Core Audio Format"),
419
.long_name = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"),
388
420
.priv_data_size = sizeof(CaffContext),
389
421
.read_probe = probe,
390
422
.read_header = read_header,
391
423
.read_packet = read_packet,
392
424
.read_seek = read_seek,
393
.codec_tag = (const AVCodecTag*[]){ff_codec_caf_tags, 0},
425
.codec_tag = (const AVCodecTag* const []){ ff_codec_caf_tags, 0 },