349 lines
10 KiB
C
Executable file
349 lines
10 KiB
C
Executable file
/*
|
|
* AU muxer and demuxer
|
|
* Copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* first version by Francois Revol <revol@free.fr>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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,
|
|
* 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
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/*
|
|
* Reference documents:
|
|
* http://www.opengroup.org/public/pubs/external/auformat.html
|
|
* http://www.goice.co.jp/member/mo/formats/au.html
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "avio_internal.h"
|
|
#include "pcm.h"
|
|
#include "libavutil/avassert.h"
|
|
|
|
/* if we don't know the size in advance */
|
|
#define AU_UNKNOWN_SIZE ((uint32_t)(~0))
|
|
/* the specification requires an annotation field of at least eight bytes */
|
|
#define AU_DEFAULT_HEADER_SIZE (24+8)
|
|
|
|
static const AVCodecTag codec_au_tags[] = {
|
|
{ AV_CODEC_ID_PCM_MULAW, 1 },
|
|
{ AV_CODEC_ID_PCM_S8, 2 },
|
|
{ AV_CODEC_ID_PCM_S16BE, 3 },
|
|
{ AV_CODEC_ID_PCM_S24BE, 4 },
|
|
{ AV_CODEC_ID_PCM_S32BE, 5 },
|
|
{ AV_CODEC_ID_PCM_F32BE, 6 },
|
|
{ AV_CODEC_ID_PCM_F64BE, 7 },
|
|
{ AV_CODEC_ID_ADPCM_G726LE, 23 },
|
|
{ AV_CODEC_ID_ADPCM_G722,24 },
|
|
{ AV_CODEC_ID_ADPCM_G726LE, 25 },
|
|
{ AV_CODEC_ID_ADPCM_G726LE, 26 },
|
|
{ AV_CODEC_ID_PCM_ALAW, 27 },
|
|
{ AV_CODEC_ID_ADPCM_G726LE, MKBETAG('7','2','6','2') },
|
|
{ AV_CODEC_ID_NONE, 0 },
|
|
};
|
|
|
|
#if CONFIG_AU_DEMUXER
|
|
|
|
static int au_probe(const AVProbeData *p)
|
|
{
|
|
if (p->buf[0] == '.' && p->buf[1] == 's' &&
|
|
p->buf[2] == 'n' && p->buf[3] == 'd')
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int au_read_annotation(AVFormatContext *s, int size)
|
|
{
|
|
static const char * keys[] = {
|
|
"title",
|
|
"artist",
|
|
"album",
|
|
"track",
|
|
"genre",
|
|
NULL };
|
|
AVIOContext *pb = s->pb;
|
|
enum { PARSE_KEY, PARSE_VALUE, PARSE_FINISHED } state = PARSE_KEY;
|
|
char c;
|
|
AVBPrint bprint;
|
|
char * key = NULL;
|
|
char * value = NULL;
|
|
int i;
|
|
|
|
av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
|
|
|
|
while (size-- > 0) {
|
|
c = avio_r8(pb);
|
|
switch(state) {
|
|
case PARSE_KEY:
|
|
if (c == '\0') {
|
|
state = PARSE_FINISHED;
|
|
} else if (c == '=') {
|
|
av_bprint_finalize(&bprint, &key);
|
|
av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
|
|
state = PARSE_VALUE;
|
|
} else {
|
|
av_bprint_chars(&bprint, c, 1);
|
|
}
|
|
break;
|
|
case PARSE_VALUE:
|
|
if (c == '\0' || c == '\n') {
|
|
if (av_bprint_finalize(&bprint, &value) != 0) {
|
|
av_log(s, AV_LOG_ERROR, "Memory error while parsing AU metadata.\n");
|
|
} else {
|
|
av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
|
|
for (i = 0; keys[i] != NULL && key != NULL; i++) {
|
|
if (av_strcasecmp(keys[i], key) == 0) {
|
|
av_dict_set(&(s->metadata), keys[i], value, AV_DICT_DONT_STRDUP_VAL);
|
|
av_freep(&key);
|
|
value = NULL;
|
|
}
|
|
}
|
|
}
|
|
av_freep(&key);
|
|
av_freep(&value);
|
|
state = (c == '\0') ? PARSE_FINISHED : PARSE_KEY;
|
|
} else {
|
|
av_bprint_chars(&bprint, c, 1);
|
|
}
|
|
break;
|
|
case PARSE_FINISHED:
|
|
break;
|
|
default:
|
|
/* should never happen */
|
|
av_assert0(0);
|
|
}
|
|
}
|
|
av_bprint_finalize(&bprint, NULL);
|
|
av_freep(&key);
|
|
return 0;
|
|
}
|
|
|
|
#define BLOCK_SIZE 1024
|
|
|
|
static int au_read_header(AVFormatContext *s)
|
|
{
|
|
int size, data_size = 0;
|
|
unsigned int tag;
|
|
AVIOContext *pb = s->pb;
|
|
unsigned int id, channels, rate;
|
|
int bps, ba = 0;
|
|
enum AVCodecID codec;
|
|
AVStream *st;
|
|
|
|
tag = avio_rl32(pb);
|
|
if (tag != MKTAG('.', 's', 'n', 'd'))
|
|
return AVERROR_INVALIDDATA;
|
|
size = avio_rb32(pb); /* header size */
|
|
data_size = avio_rb32(pb); /* data size in bytes */
|
|
|
|
if (data_size < 0 && data_size != AU_UNKNOWN_SIZE) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid negative data size '%d' found\n", data_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
id = avio_rb32(pb);
|
|
rate = avio_rb32(pb);
|
|
channels = avio_rb32(pb);
|
|
|
|
if (size > 24) {
|
|
/* parse annotation field to get metadata */
|
|
au_read_annotation(s, size - 24);
|
|
}
|
|
|
|
codec = ff_codec_get_id(codec_au_tags, id);
|
|
|
|
if (codec == AV_CODEC_ID_NONE) {
|
|
avpriv_request_sample(s, "unknown or unsupported codec tag: %u", id);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
bps = av_get_bits_per_sample(codec);
|
|
if (codec == AV_CODEC_ID_ADPCM_G726LE) {
|
|
if (id == MKBETAG('7','2','6','2')) {
|
|
bps = 2;
|
|
} else {
|
|
const uint8_t bpcss[] = {4, 0, 3, 5};
|
|
av_assert0(id >= 23 && id < 23 + 4);
|
|
ba = bpcss[id - 23];
|
|
bps = bpcss[id - 23];
|
|
}
|
|
} else if (!bps) {
|
|
avpriv_request_sample(s, "Unknown bits per sample");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if (channels == 0 || channels >= INT_MAX / (BLOCK_SIZE * bps >> 3)) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid number of channels %u\n", channels);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (rate == 0 || rate > INT_MAX) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid sample rate: %u\n", rate);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_tag = id;
|
|
st->codecpar->codec_id = codec;
|
|
st->codecpar->channels = channels;
|
|
st->codecpar->sample_rate = rate;
|
|
st->codecpar->bits_per_coded_sample = bps;
|
|
st->codecpar->bit_rate = channels * rate * bps;
|
|
st->codecpar->block_align = ba ? ba : FFMAX(bps * st->codecpar->channels / 8, 1);
|
|
if (data_size != AU_UNKNOWN_SIZE)
|
|
st->duration = (((int64_t)data_size)<<3) / (st->codecpar->channels * (int64_t)bps);
|
|
|
|
st->start_time = 0;
|
|
avpriv_set_pts_info(st, 64, 1, rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_au_demuxer = {
|
|
.name = "au",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Sun AU"),
|
|
.read_probe = au_probe,
|
|
.read_header = au_read_header,
|
|
.read_packet = ff_pcm_read_packet,
|
|
.read_seek = ff_pcm_read_seek,
|
|
.codec_tag = (const AVCodecTag* const []) { codec_au_tags, 0 },
|
|
};
|
|
|
|
#endif /* CONFIG_AU_DEMUXER */
|
|
|
|
#if CONFIG_AU_MUXER
|
|
|
|
typedef struct AUContext {
|
|
uint32_t header_size;
|
|
} AUContext;
|
|
|
|
#include "rawenc.h"
|
|
|
|
static int au_get_annotations(AVFormatContext *s, char **buffer)
|
|
{
|
|
static const char * keys[] = {
|
|
"Title",
|
|
"Artist",
|
|
"Album",
|
|
"Track",
|
|
"Genre",
|
|
NULL };
|
|
int i;
|
|
int cnt = 0;
|
|
AVDictionary *m = s->metadata;
|
|
AVDictionaryEntry *t = NULL;
|
|
AVBPrint bprint;
|
|
|
|
av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
|
|
|
|
for (i = 0; keys[i] != NULL; i++) {
|
|
t = av_dict_get(m, keys[i], NULL, 0);
|
|
if (t != NULL) {
|
|
if (cnt++)
|
|
av_bprint_chars(&bprint, '\n', 1);
|
|
av_bprint_append_data(&bprint, keys[i], strlen(keys[i]));
|
|
av_bprint_chars(&bprint, '=', 1);
|
|
av_bprint_append_data(&bprint, t->value, strlen(t->value));
|
|
}
|
|
}
|
|
/* pad with 0's */
|
|
av_bprint_append_data(&bprint, "\0\0\0\0\0\0\0\0", 8);
|
|
return av_bprint_finalize(&bprint, buffer);
|
|
}
|
|
|
|
static int au_write_header(AVFormatContext *s)
|
|
{
|
|
int ret;
|
|
AUContext *au = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
char *annotations = NULL;
|
|
|
|
au->header_size = AU_DEFAULT_HEADER_SIZE;
|
|
|
|
if (s->nb_streams != 1) {
|
|
av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
par->codec_tag = ff_codec_get_tag(codec_au_tags, par->codec_id);
|
|
if (!par->codec_tag) {
|
|
av_log(s, AV_LOG_ERROR, "unsupported codec\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (av_dict_count(s->metadata) > 0) {
|
|
ret = au_get_annotations(s, &annotations);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (annotations != NULL) {
|
|
au->header_size = (24 + strlen(annotations) + 8) & ~7;
|
|
if (au->header_size < AU_DEFAULT_HEADER_SIZE)
|
|
au->header_size = AU_DEFAULT_HEADER_SIZE;
|
|
}
|
|
}
|
|
ffio_wfourcc(pb, ".snd"); /* magic number */
|
|
avio_wb32(pb, au->header_size); /* header size */
|
|
avio_wb32(pb, AU_UNKNOWN_SIZE); /* data size */
|
|
avio_wb32(pb, par->codec_tag); /* codec ID */
|
|
avio_wb32(pb, par->sample_rate);
|
|
avio_wb32(pb, par->channels);
|
|
if (annotations != NULL) {
|
|
avio_write(pb, annotations, au->header_size - 24);
|
|
av_freep(&annotations);
|
|
} else {
|
|
avio_wb64(pb, 0); /* annotation field */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int au_write_trailer(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
AUContext *au = s->priv_data;
|
|
int64_t file_size = avio_tell(pb);
|
|
|
|
if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && file_size < INT32_MAX) {
|
|
/* update file size */
|
|
avio_seek(pb, 8, SEEK_SET);
|
|
avio_wb32(pb, (uint32_t)(file_size - au->header_size));
|
|
avio_seek(pb, file_size, SEEK_SET);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_au_muxer = {
|
|
.name = "au",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Sun AU"),
|
|
.mime_type = "audio/basic",
|
|
.extensions = "au",
|
|
.priv_data_size = sizeof(AUContext),
|
|
.audio_codec = AV_CODEC_ID_PCM_S16BE,
|
|
.video_codec = AV_CODEC_ID_NONE,
|
|
.write_header = au_write_header,
|
|
.write_packet = ff_raw_write_packet,
|
|
.write_trailer = au_write_trailer,
|
|
.codec_tag = (const AVCodecTag* const []) { codec_au_tags, 0 },
|
|
.flags = AVFMT_NOTIMESTAMPS,
|
|
};
|
|
|
|
#endif /* CONFIG_AU_MUXER */
|