* Copyright (c) 2007 Justin Ruggles
* Copyright (c) 2009 Peter Ross
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavformat/cafdec.c
+ * @file
* Core Audio Format demuxer
*/
#include "avformat.h"
-#include "riff.h"
+#include "internal.h"
#include "isom.h"
+#include "mov_chan.h"
#include "libavutil/intreadwrite.h"
+#include "libavutil/intfloat.h"
+#include "libavutil/dict.h"
#include "caf.h"
typedef struct {
/** Read audio description chunk */
static int read_desc_chunk(AVFormatContext *s)
{
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
CaffContext *caf = s->priv_data;
AVStream *st;
int flags;
/* new audio stream */
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
/* parse format description */
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->sample_rate = av_int2dbl(get_be64(pb));
- st->codec->codec_tag = get_be32(pb);
- flags = get_be32(pb);
- caf->bytes_per_packet = get_be32(pb);
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->sample_rate = av_int2double(avio_rb64(pb));
+ st->codec->codec_tag = avio_rb32(pb);
+ flags = avio_rb32(pb);
+ caf->bytes_per_packet = avio_rb32(pb);
st->codec->block_align = caf->bytes_per_packet;
- caf->frames_per_packet = get_be32(pb);
- st->codec->channels = get_be32(pb);
- st->codec->bits_per_coded_sample = get_be32(pb);
+ caf->frames_per_packet = avio_rb32(pb);
+ st->codec->channels = avio_rb32(pb);
+ st->codec->bits_per_coded_sample = avio_rb32(pb);
/* calculate bit rate for constant size packets */
if (caf->frames_per_packet > 0 && caf->bytes_per_packet > 0) {
/** Read magic cookie chunk */
static int read_kuki_chunk(AVFormatContext *s, int64_t size)
{
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVStream *st = s->streams[0];
if (size < 0 || size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
return -1;
- if (st->codec->codec_id == CODEC_ID_AAC) {
+ if (st->codec->codec_id == AV_CODEC_ID_AAC) {
/* The magic cookie format for AAC is an mp4 esds atom.
The lavc AAC decoder requires the data from the codec specific
description as extradata input. */
int strt, skip;
MOVAtom atom;
- strt = url_ftell(pb);
+ strt = avio_tell(pb);
ff_mov_read_esds(s, pb, atom);
- skip = size - (url_ftell(pb) - strt);
+ skip = size - (avio_tell(pb) - strt);
if (skip < 0 || !st->codec->extradata ||
- st->codec->codec_id != CODEC_ID_AAC) {
+ st->codec->codec_id != AV_CODEC_ID_AAC) {
av_log(s, AV_LOG_ERROR, "invalid AAC magic cookie\n");
return AVERROR_INVALIDDATA;
}
- url_fskip(pb, skip);
+ avio_skip(pb, skip);
+ } else if (st->codec->codec_id == AV_CODEC_ID_ALAC) {
+#define ALAC_PREAMBLE 12
+#define ALAC_HEADER 36
+#define ALAC_NEW_KUKI 24
+ uint8_t preamble[12];
+ if (size < ALAC_NEW_KUKI) {
+ av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
+ avio_skip(pb, size);
+ return AVERROR_INVALIDDATA;
+ }
+ avio_read(pb, preamble, ALAC_PREAMBLE);
+
+ st->codec->extradata = av_mallocz(ALAC_HEADER + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!st->codec->extradata)
+ return AVERROR(ENOMEM);
+
+ /* For the old style cookie, we skip 12 bytes, then read 36 bytes.
+ * The new style cookie only contains the last 24 bytes of what was
+ * 36 bytes in the old style cookie, so we fabricate the first 12 bytes
+ * in that case to maintain compatibility. */
+ if (!memcmp(&preamble[4], "frmaalac", 8)) {
+ if (size < ALAC_PREAMBLE + ALAC_HEADER) {
+ av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
+ av_freep(&st->codec->extradata);
+ return AVERROR_INVALIDDATA;
+ }
+ avio_read(pb, st->codec->extradata, ALAC_HEADER);
+ avio_skip(pb, size - ALAC_PREAMBLE - ALAC_HEADER);
+ } else {
+ AV_WB32(st->codec->extradata, 36);
+ memcpy(&st->codec->extradata[4], "alac", 4);
+ AV_WB32(&st->codec->extradata[8], 0);
+ memcpy(&st->codec->extradata[12], preamble, 12);
+ avio_read(pb, &st->codec->extradata[24], ALAC_NEW_KUKI - 12);
+ avio_skip(pb, size - ALAC_NEW_KUKI);
+ }
+ st->codec->extradata_size = ALAC_HEADER;
} else {
st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
- get_buffer(pb, st->codec->extradata, size);
+ avio_read(pb, st->codec->extradata, size);
st->codec->extradata_size = size;
}
/** Read packet table chunk */
static int read_pakt_chunk(AVFormatContext *s, int64_t size)
{
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVStream *st = s->streams[0];
CaffContext *caf = s->priv_data;
- int64_t pos = 0, ccount;
- int num_packets, i;
+ int64_t pos = 0, ccount, num_packets;
+ int i;
- ccount = url_ftell(pb);
+ ccount = avio_tell(pb);
- num_packets = get_be64(pb);
+ num_packets = avio_rb64(pb);
if (num_packets < 0 || INT32_MAX / sizeof(AVIndexEntry) < num_packets)
return AVERROR_INVALIDDATA;
- st->nb_frames = get_be64(pb); /* valid frames */
- st->nb_frames += get_be32(pb); /* priming frames */
- st->nb_frames += get_be32(pb); /* remainder frames */
+ st->nb_frames = avio_rb64(pb); /* valid frames */
+ st->nb_frames += avio_rb32(pb); /* priming frames */
+ st->nb_frames += avio_rb32(pb); /* remainder frames */
st->duration = 0;
for (i = 0; i < num_packets; i++) {
st->duration += caf->frames_per_packet ? caf->frames_per_packet : ff_mp4_read_descr_len(pb);
}
- if (url_ftell(pb) - ccount != size) {
+ if (avio_tell(pb) - ccount > size) {
av_log(s, AV_LOG_ERROR, "error reading packet table\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
+ avio_skip(pb, ccount + size - avio_tell(pb));
caf->num_bytes = pos;
return 0;
/** Read information chunk */
static void read_info_chunk(AVFormatContext *s, int64_t size)
{
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
unsigned int i;
- unsigned int nb_entries = get_be32(pb);
+ unsigned int nb_entries = avio_rb32(pb);
for (i = 0; i < nb_entries; i++) {
char key[32];
char value[1024];
- get_strz(pb, key, sizeof(key));
- get_strz(pb, value, sizeof(value));
- av_metadata_set(&s->metadata, key, value);
+ avio_get_str(pb, INT_MAX, key, sizeof(key));
+ avio_get_str(pb, INT_MAX, value, sizeof(value));
+ av_dict_set(&s->metadata, key, value, 0);
}
}
-static int read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int read_header(AVFormatContext *s)
{
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
CaffContext *caf = s->priv_data;
AVStream *st;
uint32_t tag = 0;
int found_data, ret;
int64_t size;
- url_fskip(pb, 8); /* magic, version, file flags */
+ avio_skip(pb, 8); /* magic, version, file flags */
/* audio description chunk */
- if (get_be32(pb) != MKBETAG('d','e','s','c')) {
+ if (avio_rb32(pb) != MKBETAG('d','e','s','c')) {
av_log(s, AV_LOG_ERROR, "desc chunk not present\n");
return AVERROR_INVALIDDATA;
}
- size = get_be64(pb);
+ size = avio_rb64(pb);
if (size != 32)
return AVERROR_INVALIDDATA;
/* parse each chunk */
found_data = 0;
- while (!url_feof(pb)) {
+ while (!pb->eof_reached) {
/* stop at data chunk if seeking is not supported or
data chunk size is unknown */
- if (found_data && (caf->data_size < 0 || url_is_streamed(pb)))
+ if (found_data && (caf->data_size < 0 || !pb->seekable))
break;
- tag = get_be32(pb);
- size = get_be64(pb);
- if (url_feof(pb))
+ tag = avio_rb32(pb);
+ size = avio_rb64(pb);
+ if (pb->eof_reached)
break;
switch (tag) {
case MKBETAG('d','a','t','a'):
- url_fskip(pb, 4); /* edit count */
- caf->data_start = url_ftell(pb);
+ avio_skip(pb, 4); /* edit count */
+ caf->data_start = avio_tell(pb);
caf->data_size = size < 0 ? -1 : size - 4;
- if (caf->data_size > 0 && !url_is_streamed(pb))
- url_fskip(pb, caf->data_size);
+ if (caf->data_size > 0 && pb->seekable)
+ avio_skip(pb, caf->data_size);
found_data = 1;
break;
+ case MKBETAG('c','h','a','n'):
+ if ((ret = ff_mov_read_chan(s, s->pb, st, size)) < 0)
+ return ret;
+ break;
+
/* magic cookie chunk */
case MKBETAG('k','u','k','i'):
if (read_kuki_chunk(s, size))
case MKBETAG('f','r','e','e'):
if (size < 0)
return AVERROR_INVALIDDATA;
- url_fskip(pb, size);
+ avio_skip(pb, size);
break;
}
}
"block size or frame size are variable.\n");
return AVERROR_INVALIDDATA;
}
- s->file_size = url_fsize(pb);
- s->file_size = FFMAX(0, s->file_size);
- av_set_pts_info(st, 64, 1, st->codec->sample_rate);
+ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
st->start_time = 0;
/* position the stream at the start of data */
if (caf->data_size >= 0)
- url_fseek(pb, caf->data_start, SEEK_SET);
+ avio_seek(pb, caf->data_start, SEEK_SET);
return 0;
}
static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVStream *st = s->streams[0];
CaffContext *caf = s->priv_data;
int res, pkt_size = 0, pkt_frames = 0;
int64_t left = CAF_MAX_PKT_SIZE;
- if (url_feof(pb))
+ if (pb->eof_reached)
return AVERROR(EIO);
/* don't read past end of data chunk */
if (caf->data_size > 0) {
- left = (caf->data_start + caf->data_size) - url_ftell(pb);
+ left = (caf->data_start + caf->data_size) - avio_tell(pb);
if (left <= 0)
return AVERROR(EIO);
}
{
AVStream *st = s->streams[0];
CaffContext *caf = s->priv_data;
- int64_t pos;
+ int64_t pos, packet_cnt, frame_cnt;
timestamp = FFMAX(timestamp, 0);
pos = caf->bytes_per_packet * timestamp / caf->frames_per_packet;
if (caf->data_size > 0)
pos = FFMIN(pos, caf->data_size);
- caf->packet_cnt = pos / caf->bytes_per_packet;
- caf->frame_cnt = caf->frames_per_packet * caf->packet_cnt;
+ packet_cnt = pos / caf->bytes_per_packet;
+ frame_cnt = caf->frames_per_packet * packet_cnt;
} else if (st->nb_index_entries) {
- caf->packet_cnt = av_index_search_timestamp(st, timestamp, flags);
- caf->frame_cnt = st->index_entries[caf->packet_cnt].timestamp;
- pos = st->index_entries[caf->packet_cnt].pos;
+ packet_cnt = av_index_search_timestamp(st, timestamp, flags);
+ frame_cnt = st->index_entries[packet_cnt].timestamp;
+ pos = st->index_entries[packet_cnt].pos;
} else {
return -1;
}
- url_fseek(s->pb, pos + caf->data_start, SEEK_SET);
+ if (avio_seek(s->pb, pos + caf->data_start, SEEK_SET) < 0)
+ return -1;
+
+ caf->packet_cnt = packet_cnt;
+ caf->frame_cnt = frame_cnt;
+
return 0;
}
-AVInputFormat caf_demuxer = {
- "caf",
- NULL_IF_CONFIG_SMALL("Apple Core Audio Format"),
- sizeof(CaffContext),
- probe,
- read_header,
- read_packet,
- NULL,
- read_seek,
- .codec_tag = (const AVCodecTag*[]){ff_codec_caf_tags, 0},
+AVInputFormat ff_caf_demuxer = {
+ .name = "caf",
+ .long_name = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"),
+ .priv_data_size = sizeof(CaffContext),
+ .read_probe = probe,
+ .read_header = read_header,
+ .read_packet = read_packet,
+ .read_seek = read_seek,
+ .codec_tag = (const AVCodecTag* const []){ ff_codec_caf_tags, 0 },
};