145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/*
|
|
* WavPack muxer
|
|
* Copyright (c) 2012 Paul B Mahol
|
|
*
|
|
* 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/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "avio_internal.h"
|
|
#include "apetag.h"
|
|
|
|
#define WV_EXTRA_SIZE 12
|
|
#define WV_END_BLOCK 0x1000
|
|
|
|
typedef struct{
|
|
uint32_t duration;
|
|
} WVMuxContext;
|
|
|
|
static int write_header(AVFormatContext *s)
|
|
{
|
|
AVCodecContext *codec = s->streams[0]->codec;
|
|
|
|
if (s->nb_streams > 1) {
|
|
av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (codec->codec_id != AV_CODEC_ID_WAVPACK) {
|
|
av_log(s, AV_LOG_ERROR, "unsupported codec\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (codec->extradata_size > 0) {
|
|
av_log_missing_feature(s, "remuxing from matroska container", 0);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
avpriv_set_pts_info(s->streams[0], 64, 1, codec->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
WVMuxContext *wc = s->priv_data;
|
|
AVCodecContext *codec = s->streams[0]->codec;
|
|
AVIOContext *pb = s->pb;
|
|
uint64_t size;
|
|
uint32_t flags;
|
|
uint32_t left = pkt->size;
|
|
uint8_t *ptr = pkt->data;
|
|
int off = codec->channels > 2 ? 4 : 0;
|
|
|
|
/* FIXME: Simplify decoder/demuxer so bellow code can support midstream
|
|
* change of stream parameters */
|
|
wc->duration += pkt->duration;
|
|
ffio_wfourcc(pb, "wvpk");
|
|
if (off) {
|
|
size = AV_RL32(pkt->data);
|
|
if (size <= 12)
|
|
return AVERROR_INVALIDDATA;
|
|
size -= 12;
|
|
} else {
|
|
size = pkt->size;
|
|
}
|
|
|
|
if (size + off > left)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_wl32(pb, size + 12);
|
|
avio_wl16(pb, 0x410);
|
|
avio_w8(pb, 0);
|
|
avio_w8(pb, 0);
|
|
avio_wl32(pb, -1);
|
|
avio_wl32(pb, pkt->pts);
|
|
ptr += off; left -= off;
|
|
flags = AV_RL32(ptr + 4);
|
|
avio_write(pb, ptr, size);
|
|
ptr += size; left -= size;
|
|
|
|
while (!(flags & WV_END_BLOCK) &&
|
|
(left >= 4 + WV_EXTRA_SIZE)) {
|
|
ffio_wfourcc(pb, "wvpk");
|
|
size = AV_RL32(ptr);
|
|
ptr += 4; left -= 4;
|
|
if (size < 24 || size - 24 > left)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_wl32(pb, size);
|
|
avio_wl16(pb, 0x410);
|
|
avio_w8(pb, 0);
|
|
avio_w8(pb, 0);
|
|
avio_wl32(pb, -1);
|
|
avio_wl32(pb, pkt->pts);
|
|
flags = AV_RL32(ptr + 4);
|
|
avio_write(pb, ptr, WV_EXTRA_SIZE);
|
|
ptr += WV_EXTRA_SIZE; left -= WV_EXTRA_SIZE;
|
|
avio_write(pb, ptr, size - 24);
|
|
ptr += size - 24; left -= size - 24;
|
|
}
|
|
avio_flush(pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int write_trailer(AVFormatContext *s)
|
|
{
|
|
WVMuxContext *wc = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
|
|
ff_ape_write(s);
|
|
|
|
if (pb->seekable) {
|
|
avio_seek(pb, 12, SEEK_SET);
|
|
avio_wl32(pb, wc->duration);
|
|
avio_flush(pb);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_wv_muxer = {
|
|
.name = "wv",
|
|
.long_name = NULL_IF_CONFIG_SMALL("WavPack"),
|
|
.priv_data_size = sizeof(WVMuxContext),
|
|
.extensions = "wv",
|
|
.audio_codec = AV_CODEC_ID_WAVPACK,
|
|
.video_codec = AV_CODEC_ID_NONE,
|
|
.write_header = write_header,
|
|
.write_packet = write_packet,
|
|
.write_trailer = write_trailer,
|
|
};
|