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AIFF format support by (Patrick Guimond <patg a.t patg d.o.t homeunix d.o.t org)

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Originally committed as revision 4924 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-02-02 15:21:19 +00:00
parent 93d3e278cd
commit f11288dab4
9 changed files with 547 additions and 1 deletions
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1
Changelog
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@ -33,6 +33,7 @@ version <next>
- CamStudio video decoder
- build system improvements
- tabs and trailing whitespace removed from the codebase
- AIFF/AIFF-C audio format, encoding and decoding
version 0.4.9-pre1:

2
libavformat/Makefile
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@ -22,7 +22,7 @@ OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o img2.o raw.o rm.o \
yuv4mpeg.o 4xm.o flvdec.o psxstr.o idroq.o ipmovie.o \
nut.o wc3movie.o mp3.o westwood.o segafilm.o idcin.o flic.o \
sierravmd.o matroska.o sol.o electronicarts.o nsvdec.o asf.o \
ogg2.o oggparsevorbis.o oggparsetheora.o oggparseflac.o daud.o
ogg2.o oggparsevorbis.o oggparsetheora.o oggparseflac.o daud.o aiff.o
# muxers
ifeq ($(CONFIG_MUXERS),yes)

482
libavformat/aiff.c Normal file
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@ -0,0 +1,482 @@
/*
* AIFF/AIFF-C encoder and decoder
* Copyright (c) 2006 Patrick Guimond
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "avi.h"
#include "intfloat_readwrite.h"
const CodecTag codec_aiff_tags[] = {
{ CODEC_ID_PCM_S16BE, MKTAG('N','O','N','E') },
{ CODEC_ID_PCM_S8, MKTAG('N','O','N','E') },
{ CODEC_ID_PCM_S24BE, MKTAG('N','O','N','E') },
{ CODEC_ID_PCM_S32BE, MKTAG('N','O','N','E') },
{ CODEC_ID_PCM_ALAW, MKTAG('a','l','a','w') },
{ CODEC_ID_PCM_ALAW, MKTAG('A','L','A','W') },
{ CODEC_ID_PCM_MULAW, MKTAG('u','l','a','w') },
{ CODEC_ID_PCM_MULAW, MKTAG('U','L','A','W') },
{ CODEC_ID_MACE3, MKTAG('M','A','C','3') },
{ CODEC_ID_MACE6, MKTAG('M','A','C','6') },
{ CODEC_ID_GSM, MKTAG('G','S','M',' ') },
{ CODEC_ID_ADPCM_G726, MKTAG('G','7','2','6') },
{ 0, 0 },
};
#define AIFF 0
#define AIFF_C_VERSION1 0xA2805140
static int aiff_codec_get_id (int bps)
{
if (bps <= 8)
return CODEC_ID_PCM_S8;
if (bps <= 16)
return CODEC_ID_PCM_S16BE;
if (bps <= 24)
return CODEC_ID_PCM_S24BE;
if (bps <= 32)
return CODEC_ID_PCM_S32BE;
/* bigger than 32 isn't allowed */
return 0;
}
/* returns the size of the found tag */
static int get_tag(ByteIOContext *pb, uint32_t * tag)
{
int size;
if (url_feof(pb))
return AVERROR_IO;
*tag = get_le32(pb);
size = get_be32(pb);
if (size < 0)
size = 0x7fffffff;
return size;
}
/* Metadata string read */
static void get_meta(ByteIOContext *pb, char * str, int strsize, int size)
{
int res;
if (size > strsize-1)
res = get_buffer(pb, (uint8_t*)str, strsize-1);
else
res = get_buffer(pb, (uint8_t*)str, size);
if (res < 0)
return;
str[res] = 0;
if (size & 1)
size++;
size -= res;
if (size);
url_fskip(pb, size);
}
/* Returns the number of bits per second */
static int fix_bps(int codec_id)
{
switch (codec_id) {
case CODEC_ID_PCM_S8:
return 8;
case CODEC_ID_PCM_S16BE:
return 16;
case CODEC_ID_PCM_S24BE:
return 24;
case CODEC_ID_PCM_S32BE:
return 32;
}
return -1;
}
/* Returns the number of sound data frames or negative on error */
unsigned int get_aiff_header(ByteIOContext *pb, AVCodecContext *codec,
int size, unsigned version)
{
AVExtFloat ext;
double sample_rate;
unsigned int num_frames;
if (size & 1)
size++;
codec->codec_type = CODEC_TYPE_AUDIO;
codec->channels = get_be16(pb);
num_frames = get_be32(pb);
codec->bits_per_sample = get_be16(pb);
get_buffer(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */
sample_rate = av_ext2dbl(ext); /* 80 bits BE IEEE extended float */
codec->sample_rate = sample_rate;
size -= 18;
/* Got an AIFF-C? */
if (version == AIFF_C_VERSION1) {
codec->codec_tag = get_le32(pb);
codec->codec_id = codec_get_id (codec_aiff_tags, codec->codec_tag);
if (codec->codec_id == CODEC_ID_PCM_S16BE) {
codec->codec_id = aiff_codec_get_id (codec->bits_per_sample);
codec->bits_per_sample = fix_bps(codec->codec_id);
}
size -= 4;
} else {
/* Need the codec type */
codec->codec_id = aiff_codec_get_id (codec->bits_per_sample);
codec->bits_per_sample = fix_bps(codec->codec_id);
}
if (!codec->codec_id)
return AVERROR_INVALIDDATA;
/* Block align needs to be computed in all cases, as the definition
* is specific to applications -> here we use the WAVE format definition */
codec->block_align = (codec->bits_per_sample * codec->channels) >> 3;
codec->bit_rate = codec->sample_rate * codec->block_align;
/* Chunk is over */
if (size)
url_fseek(pb, size, SEEK_CUR);
return num_frames;
}
#ifdef CONFIG_MUXERS
typedef struct {
offset_t form;
offset_t frames;
offset_t ssnd;
} AIFFOutputContext;
static int aiff_write_header(AVFormatContext *s)
{
AIFFOutputContext *aiff = s->priv_data;
ByteIOContext *pb = &s->pb;
AVCodecContext *enc = s->streams[0]->codec;
AVExtFloat sample_rate;
int coder_len;
/* First verify if format is ok */
enc->codec_tag = codec_get_tag(codec_aiff_tags, enc->codec_id);
if (!enc->codec_tag) {
av_free(aiff);
return -1;
}
coder_len = strlen(enc->codec->name);
/* FORM AIFF header */
put_tag(pb, "FORM");
aiff->form = url_ftell(pb);
put_be32(pb, 0); /* file length */
put_tag(pb, "AIFC");
/* Version chunk */
put_tag(pb, "FVER");
put_be32(pb, 4);
put_be32(pb, 0xA2805140);
/* Common chunk */
put_tag(pb, "COMM");
if (coder_len & 1) /* Common chunk is of var size */
put_be32(pb, 23+coder_len);
else
put_be32(pb, 24+coder_len);
put_be16(pb, enc->channels); /* Number of channels */
aiff->frames = url_ftell(pb);
put_be32(pb, 0); /* Number of frames */
if (!enc->bits_per_sample)
enc->bits_per_sample = (enc->block_align<<3) / enc->channels;
put_be16(pb, enc->bits_per_sample); /* Sample size */
sample_rate = av_dbl2ext((double)enc->sample_rate);
put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));
put_le32(pb, enc->codec_tag);
if (coder_len & 1) {
put_byte(pb, coder_len);
put_buffer(pb, (uint8_t*)enc->codec->name, coder_len);
} else {
put_byte(pb, coder_len+1);
put_buffer(pb, (uint8_t*)enc->codec->name, coder_len);
put_byte(pb, 0);
}
/* Sound data chunk */
put_tag(pb, "SSND");
aiff->ssnd = url_ftell(pb); /* Sound chunk size */
put_be32(pb, 0); /* Sound samples data size */
put_be32(pb, 0); /* Data offset */
put_be32(pb, 0); /* Block-size (block align) */
av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
/* Data is starting here */
put_flush_packet(pb);
return 0;
}
static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
{
ByteIOContext *pb = &s->pb;
put_buffer(pb, pkt->data, pkt->size);
return 0;
}
static int aiff_write_trailer(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
AIFFOutputContext *aiff = s->priv_data;
AVCodecContext *enc = s->streams[0]->codec;
/* Chunks sizes must be even */
offset_t file_size, end_size;
end_size = file_size = url_ftell(pb);
if (file_size & 1) {
put_byte(pb, 0);
end_size++;
}
if (!url_is_streamed(&s->pb)) {
/* File length */
url_fseek(pb, aiff->form, SEEK_SET);
put_be32(pb, (uint32_t)(file_size - aiff->form - 4));
/* Number of sample frames */
url_fseek(pb, aiff->frames, SEEK_SET);
put_be32(pb, ((uint32_t)(file_size-aiff->ssnd-12))/enc->block_align);
/* Sound Data chunk size */
url_fseek(pb, aiff->ssnd, SEEK_SET);
put_be32(pb, (uint32_t)(file_size - aiff->ssnd - 4));
/* return to the end */
url_fseek(pb, end_size, SEEK_SET);
put_flush_packet(pb);
}
return 0;
}
#endif //CONFIG_MUXERS
static int aiff_probe(AVProbeData *p)
{
/* check file header */
if (p->buf_size < 16)
return 0;
if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
p->buf[2] == 'R' && p->buf[3] == 'M' &&
p->buf[8] == 'A' && p->buf[9] == 'I' &&
p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
return AVPROBE_SCORE_MAX;
else
return 0;
}
/* aiff input */
static int aiff_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
int size, filesize, offset;
uint32_t tag;
unsigned version = AIFF_C_VERSION1;
ByteIOContext *pb = &s->pb;
AVStream * st = s->streams[0];
/* check FORM header */
filesize = get_tag(pb, &tag);
if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
return AVERROR_INVALIDDATA;
/* AIFF data type */
tag = get_le32(pb);
if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
version = AIFF;
else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
return AVERROR_INVALIDDATA;
filesize -= 4;
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
while (filesize > 0) {
/* parse different chunks */
size = get_tag(pb, &tag);
if (size < 0)
return size;
filesize -= size + 8;
switch (tag) {
case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
/* Then for the complete header info */
st->nb_frames = get_aiff_header (pb, st->codec, size, version);
if (st->nb_frames < 0)
return st->nb_frames;
break;
case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
version = get_be32(pb);
break;
case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
get_meta (pb, s->title, sizeof(s->title), size);
break;
case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
get_meta (pb, s->author, sizeof(s->author), size);
break;
case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
get_meta (pb, s->copyright, sizeof(s->copyright), size);
break;
case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
get_meta (pb, s->comment, sizeof(s->comment), size);
break;
case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
get_be32(pb); /* Block align... don't care */
offset = get_be32(pb); /* Offset of sound data */
goto got_sound;
default: /* Jump */
if (size & 1) /* Always even aligned */
size++;
url_fskip (pb, size);
}
}
/* End of loop and didn't get sound */
return AVERROR_INVALIDDATA;
got_sound:
/* Now positioned, get the sound data start and end */
if (st->nb_frames)
s->file_size = st->nb_frames * st->codec->block_align;
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
st->start_time = 0;
st->duration = st->nb_frames;
/* Position the stream at the first block */
url_fskip(pb, offset);
return 0;
}
#define MAX_SIZE 4096
static int aiff_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
offset_t pos;
int res, size;
/* End of stream may be reached */
if (url_feof(&s->pb))
return AVERROR_IO;
/* Need to know if reached the end sound data */
size = MAX_SIZE;
if (s->file_size) {
pos = url_ftell (&s->pb) - s->file_size;
if (pos >= s->file_size)
size = 0;
else if (pos + MAX_SIZE >= s->file_size)
size = s->file_size - pos;
}
/* Now for that packet */
res = av_get_packet (&s->pb, pkt, MAX_SIZE);
if (res < 0)
return res;
/* Only one stream in an AIFF file */
pkt->stream_index = 0;
/* Finaly fix the read to a block */
if (size <= res)
pkt->size = size - (size % s->streams[0]->codec->block_align);
else
pkt->size = res - (res % s->streams[0]->codec->block_align);
return 0;
}
static int aiff_read_close(AVFormatContext *s)
{
return 0;
}
static int aiff_read_seek(AVFormatContext *s,
int stream_index, int64_t timestamp, int flags)
{
return pcm_read_seek(s, stream_index, timestamp, flags);
}
static AVInputFormat aiff_iformat = {
"aiff",
"Audio IFF",
0,
aiff_probe,
aiff_read_header,
aiff_read_packet,
aiff_read_close,
aiff_read_seek,
};
#ifdef CONFIG_MUXERS
static AVOutputFormat aiff_oformat = {
"aiff",
"Audio IFF",
"audio/aiff",
"aif,aiff,afc,aifc",
sizeof(AIFFOutputContext),
CODEC_ID_PCM_S16BE,
CODEC_ID_NONE,
aiff_write_header,
aiff_write_packet,
aiff_write_trailer,
};
#endif //CONFIG_MUXERS
int ff_aiff_init(void)
{
av_register_input_format(&aiff_iformat);
#ifdef CONFIG_MUXERS
av_register_output_format(&aiff_oformat);
#endif //CONFIG_MUXERS
return 0;
}

1
libavformat/allformats.c
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@ -54,6 +54,7 @@ void av_register_all(void)
ff_mmf_init();
swf_init();
au_init();
ff_aiff_init();
#ifdef CONFIG_MUXERS
gif_init();
#endif //CONFIG_MUXERS

3
libavformat/avformat.h
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@ -549,6 +549,9 @@ int nsvdec_init(void);
/* daud.c */
int daud_init(void);
/* aiff.c */
int ff_aiff_init(void);
#include "rtp.h"
#include "rtsp.h"

43
libavutil/intfloat_readwrite.c
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@ -38,6 +38,23 @@ float av_int2flt(int32_t v){
return ldexp(((v&0x7FFFFF) + (1<<23)) * (v>>31|1), (v>>23&0xFF)-150);
}
double av_ext2dbl(const AVExtFloat ext){
uint64_t m = 0;
int e, i;
for (i = 0; i < 8; i++)
m |= (uint64_t)ext.mantissa[i]<<(56-(i<<3));
e = (((int)ext.exponent[0]&0x7f)<<8) | ext.exponent[1];
if (e == 0x7fff && m)
return 0.0/0.0;
e -= 16383 + 63; /* In IEEE 80 bits, the whole (i.e. 1.xxxx)
* mantissa bit is written as opposed to the
* single and double precision formats */
if (ext.exponent[0]&0x80)
return ldexp(-m, e);
return ldexp(m, e);
}
int64_t av_dbl2int(double d){
int e;
if ( !d) return 0;
@ -53,3 +70,29 @@ int32_t av_flt2int(float d){
d= frexp(d, &e);
return (d<0)<<31 | (e+126)<<23 | (int64_t)((fabs(d)-0.5)*(1<<24));
}
AVExtFloat av_dbl2ext(double d){
struct AVExtFloat ext;
int e, i; double f; uint64_t m;
f = fabs(frexp(d, &e));
if (f >= 0.5 && f < 1) {
e += 16382;
ext.exponent[0] = e>>8;
ext.exponent[1] = e;
m = (uint64_t)ldexp(f, 64);
for (i=0; i < 8; i++)
ext.mantissa[i] = m>>(56-(i<<3));
} else if (f == 0.0) {
memset (&ext, 0, 10);
} else {
ext.exponent[0] = 0x7f; ext.exponent[1] = 0xff;
memset (&ext.mantissa, 0, 8);
if (f != 1/0.0)
ext.mantissa[0] = ~0;
}
if (d < 0)
ext.exponent[0] |= 0x80;
return ext;
}

8
libavutil/intfloat_readwrite.h
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@ -3,9 +3,17 @@
#include "common.h"
/* IEEE 80 bits extended float */
typedef struct AVExtFloat {
uint8_t exponent[2];
uint8_t mantissa[8];
} AVExtFloat;
double av_int2dbl(int64_t v);
float av_int2flt(int32_t v);
double av_ext2dbl(const AVExtFloat ext);
int64_t av_dbl2int(double d);
int32_t av_flt2int(float d);
AVExtFloat av_dbl2ext(double d);
#endif /* INTFLOAT_READWRITE_H */

3
tests/libav.regression.ref
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@ -62,6 +62,9 @@ e2a6d6fae17394dfe87cb5bb8ae11837 *./data/b-libav.al
20f9fa55b3c5bebe3520f5667ee4928b *./data/b-libav.mmf
22609 ./data/b-libav.mmf
./data/b-libav.mmf CRC=0x7e78cffe
a324baee6d76c53ab7c74616cfc31616 *./data/b-libav.aif
89168 ./data/b-libav.aif
./data/b-libav.aif CRC=0x2a09519c
ce356ce2708cb6033ab5d762da93cfd4 *./data/b-libav-yuv420p.yuv
304128 ./data/b-libav-yuv420p.yuv
ce356ce2708cb6033ab5d762da93cfd4 *./data/b-libav-yuv422p.yuv

5
tests/regression.sh
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@ -696,6 +696,11 @@ file=${outfile}libav.mmf
do_ffmpeg $file -t 1 -y -qscale 10 -f s16le -i $pcm_src $file
do_ffmpeg_crc $file -i $file
# aiff
file=${outfile}libav.aif
do_ffmpeg $file -t 1 -y -qscale 10 -f s16le -i $pcm_src $file
do_ffmpeg_crc $file -i $file
####################
# pix_fmt conversions
conversions="yuv420p yuv422p yuv444p yuv422 yuv410p yuv411p yuvj420p \