mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-28 12:16:12 +02:00
327 lines
9.4 KiB
C
327 lines
9.4 KiB
C
/*
|
|
* Yamaha SMAF format
|
|
* Copyright (c) 2005 Vidar Madsen
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/channel_layout.h"
|
|
#include "avformat.h"
|
|
#include "avio_internal.h"
|
|
#include "internal.h"
|
|
#include "pcm.h"
|
|
#include "rawenc.h"
|
|
#include "riff.h"
|
|
|
|
typedef struct MMFContext {
|
|
int64_t atrpos, atsqpos, awapos;
|
|
int64_t data_end;
|
|
int stereo;
|
|
} MMFContext;
|
|
|
|
static const int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 };
|
|
|
|
static int mmf_rate(int code)
|
|
{
|
|
if ((code < 0) || (code > 4))
|
|
return -1;
|
|
return mmf_rates[code];
|
|
}
|
|
|
|
#if CONFIG_MMF_MUXER
|
|
static int mmf_rate_code(int rate)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 5; i++)
|
|
if (mmf_rates[i] == rate)
|
|
return i;
|
|
return -1;
|
|
}
|
|
|
|
/* Copy of end_tag() from avienc.c, but for big-endian chunk size */
|
|
static void end_tag_be(AVIOContext *pb, int64_t start)
|
|
{
|
|
int64_t pos;
|
|
|
|
pos = avio_tell(pb);
|
|
avio_seek(pb, start - 4, SEEK_SET);
|
|
avio_wb32(pb, (uint32_t)(pos - start));
|
|
avio_seek(pb, pos, SEEK_SET);
|
|
}
|
|
|
|
static int mmf_write_header(AVFormatContext *s)
|
|
{
|
|
MMFContext *mmf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int64_t pos;
|
|
int rate;
|
|
const char *version = s->flags & AVFMT_FLAG_BITEXACT ?
|
|
"VN:Lavf," :
|
|
"VN:"LIBAVFORMAT_IDENT",";
|
|
|
|
rate = mmf_rate_code(s->streams[0]->codecpar->sample_rate);
|
|
if (rate < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d, supported are 4000, 8000, 11025, 22050 and 44100\n",
|
|
s->streams[0]->codecpar->sample_rate);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
mmf->stereo = s->streams[0]->codecpar->channels > 1;
|
|
if (mmf->stereo &&
|
|
s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
|
|
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);
|
|
}
|
|
|
|
ffio_wfourcc(pb, "MMMD");
|
|
avio_wb32(pb, 0);
|
|
pos = ff_start_tag(pb, "CNTI");
|
|
avio_w8(pb, 0); /* class */
|
|
avio_w8(pb, 1); /* type */
|
|
avio_w8(pb, 1); /* code type */
|
|
avio_w8(pb, 0); /* status */
|
|
avio_w8(pb, 0); /* counts */
|
|
end_tag_be(pb, pos);
|
|
|
|
pos = ff_start_tag(pb, "OPDA");
|
|
avio_write(pb, version, strlen(version)); /* metadata ("ST:songtitle,VN:version,...") */
|
|
end_tag_be(pb, pos);
|
|
|
|
avio_write(pb, "ATR\x00", 4);
|
|
avio_wb32(pb, 0);
|
|
mmf->atrpos = avio_tell(pb);
|
|
avio_w8(pb, 0); /* format type */
|
|
avio_w8(pb, 0); /* sequence type */
|
|
avio_w8(pb, (mmf->stereo << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */
|
|
avio_w8(pb, 0); /* wave base bit */
|
|
avio_w8(pb, 2); /* time base d */
|
|
avio_w8(pb, 2); /* time base g */
|
|
|
|
ffio_wfourcc(pb, "Atsq");
|
|
avio_wb32(pb, 16);
|
|
mmf->atsqpos = avio_tell(pb);
|
|
/* Will be filled on close */
|
|
avio_write(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);
|
|
|
|
mmf->awapos = ff_start_tag(pb, "Awa\x01");
|
|
|
|
avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate);
|
|
|
|
avio_flush(pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Write a variable-length symbol */
|
|
static void put_varlength(AVIOContext *pb, int val)
|
|
{
|
|
if (val < 128)
|
|
avio_w8(pb, val);
|
|
else {
|
|
val -= 128;
|
|
avio_w8(pb, 0x80 | val >> 7);
|
|
avio_w8(pb, 0x7f & val);
|
|
}
|
|
}
|
|
|
|
static int mmf_write_trailer(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
MMFContext *mmf = s->priv_data;
|
|
int64_t pos, size;
|
|
int gatetime;
|
|
|
|
if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
|
|
/* Fill in length fields */
|
|
end_tag_be(pb, mmf->awapos);
|
|
end_tag_be(pb, mmf->atrpos);
|
|
end_tag_be(pb, 8);
|
|
|
|
pos = avio_tell(pb);
|
|
size = pos - mmf->awapos;
|
|
|
|
/* Fill Atsq chunk */
|
|
avio_seek(pb, mmf->atsqpos, SEEK_SET);
|
|
|
|
/* "play wav" */
|
|
avio_w8(pb, 0); /* start time */
|
|
avio_w8(pb, (mmf->stereo << 6) | 1); /* (channel << 6) | wavenum */
|
|
gatetime = size * 500 / s->streams[0]->codecpar->sample_rate;
|
|
put_varlength(pb, gatetime); /* duration */
|
|
|
|
/* "nop" */
|
|
put_varlength(pb, gatetime); /* start time */
|
|
avio_write(pb, "\xff\x00", 2); /* nop */
|
|
|
|
/* "end of sequence" */
|
|
avio_write(pb, "\x00\x00\x00\x00", 4);
|
|
|
|
avio_seek(pb, pos, SEEK_SET);
|
|
|
|
avio_flush(pb);
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_MMF_MUXER */
|
|
|
|
static int mmf_probe(const 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 */
|
|
static int mmf_read_header(AVFormatContext *s)
|
|
{
|
|
MMFContext *mmf = s->priv_data;
|
|
unsigned int tag;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st;
|
|
int64_t size;
|
|
int rate, params;
|
|
|
|
tag = avio_rl32(pb);
|
|
if (tag != MKTAG('M', 'M', 'M', 'D'))
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, 4); /* file_size */
|
|
|
|
/* Skip some unused chunks that may or may not be present */
|
|
for (;; avio_skip(pb, size)) {
|
|
tag = avio_rl32(pb);
|
|
size = avio_rb32(pb);
|
|
if (tag == MKTAG('C', 'N', 'T', 'I'))
|
|
continue;
|
|
if (tag == MKTAG('O', 'P', 'D', 'A'))
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
/* Tag = "ATRx", where "x" = track number */
|
|
if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
|
|
av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
|
|
av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
avio_r8(pb); /* format type */
|
|
avio_r8(pb); /* sequence type */
|
|
params = avio_r8(pb); /* (channel << 7) | (format << 4) | rate */
|
|
rate = mmf_rate(params & 0x0f);
|
|
if (rate < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid sample rate\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avio_r8(pb); /* wave base bit */
|
|
avio_r8(pb); /* time base d */
|
|
avio_r8(pb); /* time base g */
|
|
|
|
/* Skip some unused chunks that may or may not be present */
|
|
for (;; avio_skip(pb, size)) {
|
|
tag = avio_rl32(pb);
|
|
size = avio_rb32(pb);
|
|
if (tag == MKTAG('A', 't', 's', 'q'))
|
|
continue;
|
|
if (tag == MKTAG('A', 's', 'p', 'I'))
|
|
continue;
|
|
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);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
mmf->data_end = avio_tell(pb) + size;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_YAMAHA;
|
|
st->codecpar->sample_rate = rate;
|
|
st->codecpar->channels = (params >> 7) + 1;
|
|
st->codecpar->channel_layout = params >> 7 ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
|
|
st->codecpar->bits_per_coded_sample = 4;
|
|
st->codecpar->bit_rate = st->codecpar->sample_rate *
|
|
st->codecpar->bits_per_coded_sample;
|
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define MAX_SIZE 4096
|
|
|
|
static int mmf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
MMFContext *mmf = s->priv_data;
|
|
int64_t left, size;
|
|
int ret;
|
|
|
|
left = mmf->data_end - avio_tell(s->pb);
|
|
size = FFMIN(left, MAX_SIZE);
|
|
if (avio_feof(s->pb) || size <= 0)
|
|
return AVERROR_EOF;
|
|
|
|
ret = av_get_packet(s->pb, pkt, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pkt->stream_index = 0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#if CONFIG_MMF_DEMUXER
|
|
AVInputFormat ff_mmf_demuxer = {
|
|
.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,
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_MMF_MUXER
|
|
AVOutputFormat ff_mmf_muxer = {
|
|
.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,
|
|
.write_packet = ff_raw_write_packet,
|
|
.write_trailer = mmf_write_trailer,
|
|
};
|
|
#endif
|