115329f1 |
/* |
93a23627 |
* Yamaha SMAF format
* Copyright (c) 2005 Vidar Madsen
* |
b78e7197 |
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
93a23627 |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
b78e7197 |
* version 2.1 of the License, or (at your option) any later version. |
93a23627 |
* |
b78e7197 |
* FFmpeg is distributed in the hope that it will be useful, |
93a23627 |
* 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 |
b78e7197 |
* License along with FFmpeg; if not, write to the Free Software |
5509bffa |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
93a23627 |
*/ |
f24b0b1b |
#include "libavutil/channel_layout.h" |
93a23627 |
#include "avformat.h" |
32442930 |
#include "avio_internal.h" |
ee9a4dff |
#include "internal.h" |
e94204df |
#include "pcm.h" |
3f8ee30e |
#include "rawenc.h" |
9d9f4119 |
#include "riff.h" |
93a23627 |
|
daf8cf35 |
typedef struct MMFContext { |
bc5c918e |
int64_t atrpos, atsqpos, awapos; |
3bb3cddd |
int64_t data_end; |
9ffe790a |
int stereo; |
93a23627 |
} MMFContext;
|
aecf157e |
static const int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 }; |
93a23627 |
|
37673b1b |
static int mmf_rate(int code)
{ |
ee9a4dff |
if ((code < 0) || (code > 4)) |
37673b1b |
return -1;
return mmf_rates[code];
}
|
b250f9c6 |
#if CONFIG_MMF_MUXER |
93a23627 |
static int mmf_rate_code(int rate)
{
int i; |
ee9a4dff |
for (i = 0; i < 5; i++)
if (mmf_rates[i] == rate) |
93a23627 |
return i;
return -1;
}
/* Copy of end_tag() from avienc.c, but for big-endian chunk size */ |
471fe57e |
static void end_tag_be(AVIOContext *pb, int64_t start) |
93a23627 |
{ |
bc5c918e |
int64_t pos; |
93a23627 |
|
384c9c2f |
pos = avio_tell(pb); |
f59d8ff8 |
avio_seek(pb, start - 4, SEEK_SET); |
e9eb8d0b |
avio_wb32(pb, (uint32_t)(pos - start)); |
f59d8ff8 |
avio_seek(pb, pos, SEEK_SET); |
93a23627 |
}
static int mmf_write_header(AVFormatContext *s)
{
MMFContext *mmf = s->priv_data; |
471fe57e |
AVIOContext *pb = s->pb; |
bc5c918e |
int64_t pos; |
93a23627 |
int rate; |
9646ea63 |
const char *version = s->flags & AVFMT_FLAG_BITEXACT ? |
1a34103f |
"VN:Lavf," :
"VN:"LIBAVFORMAT_IDENT","; |
93a23627 |
|
9200514a |
rate = mmf_rate_code(s->streams[0]->codecpar->sample_rate); |
ee9a4dff |
if (rate < 0) { |
c475a58d |
av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d, supported are 4000, 8000, 11025, 22050 and 44100\n", |
9200514a |
s->streams[0]->codecpar->sample_rate); |
266e88a4 |
return AVERROR(EINVAL); |
93a23627 |
} |
115329f1 |
|
6f69f7a8 |
mmf->stereo = s->streams[0]->codecpar->channels > 1; |
9ffe790a |
if (mmf->stereo && |
da8cb1c3 |
s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { |
9ffe790a |
av_log(s, AV_LOG_ERROR, "Yamaha SMAF stereo is experimental, "
"add '-strict %d' if you want to use it.\n",
FF_COMPLIANCE_EXPERIMENTAL);
return AVERROR(EINVAL);
}
|
32442930 |
ffio_wfourcc(pb, "MMMD"); |
e9eb8d0b |
avio_wb32(pb, 0); |
1a40491e |
pos = ff_start_tag(pb, "CNTI"); |
e9eb8d0b |
avio_w8(pb, 0); /* class */ |
17431f4a |
avio_w8(pb, 1); /* type */
avio_w8(pb, 1); /* code type */ |
e9eb8d0b |
avio_w8(pb, 0); /* status */
avio_w8(pb, 0); /* counts */ |
7e5d4fa9 |
end_tag_be(pb, pos); |
3dff1bf9 |
|
7e5d4fa9 |
pos = ff_start_tag(pb, "OPDA"); |
1a34103f |
avio_write(pb, version, strlen(version)); /* metadata ("ST:songtitle,VN:version,...") */ |
93a23627 |
end_tag_be(pb, pos);
|
e9eb8d0b |
avio_write(pb, "ATR\x00", 4);
avio_wb32(pb, 0); |
384c9c2f |
mmf->atrpos = avio_tell(pb); |
e9eb8d0b |
avio_w8(pb, 0); /* format type */
avio_w8(pb, 0); /* sequence type */ |
9ffe790a |
avio_w8(pb, (mmf->stereo << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */ |
e9eb8d0b |
avio_w8(pb, 0); /* wave base bit */
avio_w8(pb, 2); /* time base d */
avio_w8(pb, 2); /* time base g */ |
93a23627 |
|
32442930 |
ffio_wfourcc(pb, "Atsq"); |
e9eb8d0b |
avio_wb32(pb, 16); |
384c9c2f |
mmf->atsqpos = avio_tell(pb); |
93a23627 |
/* Will be filled on close */ |
e9eb8d0b |
avio_write(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16); |
93a23627 |
|
1a40491e |
mmf->awapos = ff_start_tag(pb, "Awa\x01"); |
93a23627 |
|
9200514a |
avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate); |
93a23627 |
|
b7f2fdde |
avio_flush(pb); |
93a23627 |
return 0;
}
/* Write a variable-length symbol */ |
471fe57e |
static void put_varlength(AVIOContext *pb, int val) |
93a23627 |
{ |
ee9a4dff |
if (val < 128) |
e9eb8d0b |
avio_w8(pb, val); |
93a23627 |
else {
val -= 128; |
e9eb8d0b |
avio_w8(pb, 0x80 | val >> 7);
avio_w8(pb, 0x7f & val); |
93a23627 |
}
}
static int mmf_write_trailer(AVFormatContext *s)
{ |
471fe57e |
AVIOContext *pb = s->pb; |
93a23627 |
MMFContext *mmf = s->priv_data; |
bc5c918e |
int64_t pos, size; |
93a23627 |
int gatetime;
|
83548fe8 |
if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) { |
93a23627 |
/* Fill in length fields */
end_tag_be(pb, mmf->awapos);
end_tag_be(pb, mmf->atrpos);
end_tag_be(pb, 8);
|
ee9a4dff |
pos = avio_tell(pb); |
93a23627 |
size = pos - mmf->awapos;
/* Fill Atsq chunk */ |
f59d8ff8 |
avio_seek(pb, mmf->atsqpos, SEEK_SET); |
93a23627 |
/* "play wav" */ |
e9eb8d0b |
avio_w8(pb, 0); /* start time */ |
9ffe790a |
avio_w8(pb, (mmf->stereo << 6) | 1); /* (channel << 6) | wavenum */ |
9200514a |
gatetime = size * 500 / s->streams[0]->codecpar->sample_rate; |
93a23627 |
put_varlength(pb, gatetime); /* duration */
/* "nop" */
put_varlength(pb, gatetime); /* start time */ |
e9eb8d0b |
avio_write(pb, "\xff\x00", 2); /* nop */ |
93a23627 |
/* "end of sequence" */ |
e9eb8d0b |
avio_write(pb, "\x00\x00\x00\x00", 4); |
93a23627 |
|
f59d8ff8 |
avio_seek(pb, pos, SEEK_SET); |
93a23627 |
|
b7f2fdde |
avio_flush(pb); |
93a23627 |
}
return 0;
} |
8212568a |
#endif /* CONFIG_MMF_MUXER */ |
93a23627 |
static int mmf_probe(AVProbeData *p)
{
/* check file header */
if (p->buf[0] == 'M' && p->buf[1] == 'M' &&
p->buf[2] == 'M' && p->buf[3] == 'D' &&
p->buf[8] == 'C' && p->buf[9] == 'N' &&
p->buf[10] == 'T' && p->buf[11] == 'I')
return AVPROBE_SCORE_MAX;
else
return 0;
}
/* mmf input */ |
6e9651d1 |
static int mmf_read_header(AVFormatContext *s) |
93a23627 |
{
MMFContext *mmf = s->priv_data;
unsigned int tag; |
471fe57e |
AVIOContext *pb = s->pb; |
93a23627 |
AVStream *st; |
e65ab9d9 |
int64_t size; |
93a23627 |
int rate, params;
|
e63a3628 |
tag = avio_rl32(pb); |
93a23627 |
if (tag != MKTAG('M', 'M', 'M', 'D')) |
266e88a4 |
return AVERROR_INVALIDDATA; |
e65ab9d9 |
avio_skip(pb, 4); /* file_size */ |
93a23627 |
/* Skip some unused chunks that may or may not be present */ |
ee9a4dff |
for (;; avio_skip(pb, size)) {
tag = avio_rl32(pb); |
e63a3628 |
size = avio_rb32(pb); |
ee9a4dff |
if (tag == MKTAG('C', 'N', 'T', 'I'))
continue;
if (tag == MKTAG('O', 'P', 'D', 'A'))
continue; |
93a23627 |
break;
}
/* Tag = "ATRx", where "x" = track number */ |
c2ea5f06 |
if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n"); |
266e88a4 |
return AVERROR_PATCHWELCOME; |
c2ea5f06 |
} |
93a23627 |
if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag); |
266e88a4 |
return AVERROR_PATCHWELCOME; |
93a23627 |
}
|
e63a3628 |
avio_r8(pb); /* format type */
avio_r8(pb); /* sequence type */
params = avio_r8(pb); /* (channel << 7) | (format << 4) | rate */ |
ee9a4dff |
rate = mmf_rate(params & 0x0f);
if (rate < 0) { |
93a23627 |
av_log(s, AV_LOG_ERROR, "Invalid sample rate\n"); |
266e88a4 |
return AVERROR_INVALIDDATA; |
93a23627 |
} |
e63a3628 |
avio_r8(pb); /* wave base bit */
avio_r8(pb); /* time base d */
avio_r8(pb); /* time base g */ |
93a23627 |
/* Skip some unused chunks that may or may not be present */ |
ee9a4dff |
for (;; avio_skip(pb, size)) {
tag = avio_rl32(pb); |
e63a3628 |
size = avio_rb32(pb); |
ee9a4dff |
if (tag == MKTAG('A', 't', 's', 'q'))
continue;
if (tag == MKTAG('A', 's', 'p', 'I'))
continue; |
93a23627 |
break;
}
/* Make sure it's followed by an Awa chunk, aka wave data */
if ((tag & 0xffffff) != MKTAG('A', 'w', 'a', 0)) {
av_log(s, AV_LOG_ERROR, "Unexpected SMAF chunk %08x\n", tag); |
266e88a4 |
return AVERROR_INVALIDDATA; |
93a23627 |
} |
3bb3cddd |
mmf->data_end = avio_tell(pb) + size; |
93a23627 |
|
3b3bbdd3 |
st = avformat_new_stream(s, NULL); |
93a23627 |
if (!st) |
769e10f0 |
return AVERROR(ENOMEM); |
93a23627 |
|
9200514a |
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_YAMAHA;
st->codecpar->sample_rate = rate; |
6f69f7a8 |
st->codecpar->channels = (params >> 7) + 1;
st->codecpar->channel_layout = params >> 7 ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO; |
9200514a |
st->codecpar->bits_per_coded_sample = 4;
st->codecpar->bit_rate = st->codecpar->sample_rate *
st->codecpar->bits_per_coded_sample; |
93a23627 |
|
9200514a |
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
93a23627 |
return 0;
}
#define MAX_SIZE 4096
|
ee9a4dff |
static int mmf_read_packet(AVFormatContext *s, AVPacket *pkt) |
93a23627 |
{
MMFContext *mmf = s->priv_data; |
3bb3cddd |
int64_t left, size;
int ret; |
93a23627 |
|
3bb3cddd |
left = mmf->data_end - avio_tell(s->pb);
size = FFMIN(left, MAX_SIZE); |
d34ec64a |
if (avio_feof(s->pb) || size <= 0) |
7f321fca |
return AVERROR_EOF; |
93a23627 |
|
8f63f241 |
ret = av_get_packet(s->pb, pkt, size); |
93a23627 |
if (ret < 0) |
8f63f241 |
return ret; |
93a23627 |
|
8f63f241 |
pkt->stream_index = 0; |
93a23627 |
return ret;
}
|
b250f9c6 |
#if CONFIG_MMF_DEMUXER |
66355be3 |
AVInputFormat ff_mmf_demuxer = { |
dfc2c4d9 |
.name = "mmf",
.long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
.priv_data_size = sizeof(MMFContext),
.read_probe = mmf_probe,
.read_header = mmf_read_header,
.read_packet = mmf_read_packet, |
3bb3cddd |
.flags = AVFMT_GENERIC_INDEX, |
93a23627 |
}; |
ff70e601 |
#endif |
ee9a4dff |
|
b250f9c6 |
#if CONFIG_MMF_MUXER |
66355be3 |
AVOutputFormat ff_mmf_muxer = { |
ee9a4dff |
.name = "mmf",
.long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
.mime_type = "application/vnd.smaf",
.extensions = "mmf",
.priv_data_size = sizeof(MMFContext),
.audio_codec = AV_CODEC_ID_ADPCM_YAMAHA,
.video_codec = AV_CODEC_ID_NONE,
.write_header = mmf_write_header, |
c475a58d |
.write_packet = ff_raw_write_packet, |
ee9a4dff |
.write_trailer = mmf_write_trailer, |
93a23627 |
}; |
ff70e601 |
#endif |