forked from KolibriOS/kolibrios
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
|
/*
|
||
|
|
* WavPack muxer
|
||
|
|
* Copyright (c) 2013 Konstantin Shishkov <kostya.shishkov@gmail.com>
|
||
|
|
* 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/attributes.h"
|
||
|
|
|
||
|
|
#include "apetag.h"
|
||
|
|
#include "avformat.h"
|
||
|
|
#include "wv.h"
|
||
|
|
|
||
|
|
typedef struct WvMuxContext {
|
||
|
|
int64_t samples;
|
||
|
|
} WvMuxContext;
|
||
|
|
|
||
|
|
static av_cold int wv_write_header(AVFormatContext *ctx)
|
||
|
|
{
|
||
|
|
if (ctx->nb_streams > 1 ||
|
||
|
|
ctx->streams[0]->codec->codec_id != AV_CODEC_ID_WAVPACK) {
|
||
|
|
av_log(ctx, AV_LOG_ERROR, "This muxer only supports a single WavPack stream.\n");
|
||
|
|
return AVERROR(EINVAL);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int wv_write_packet(AVFormatContext *ctx, AVPacket *pkt)
|
||
|
|
{
|
||
|
|
WvMuxContext *s = ctx->priv_data;
|
||
|
|
WvHeader header;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (pkt->size < WV_HEADER_SIZE ||
|
||
|
|
(ret = ff_wv_parse_header(&header, pkt->data)) < 0) {
|
||
|
|
av_log(ctx, AV_LOG_ERROR, "Invalid WavPack packet.\n");
|
||
|
|
return AVERROR(EINVAL);
|
||
|
|
}
|
||
|
|
s->samples += header.samples;
|
||
|
|
|
||
|
|
avio_write(ctx->pb, pkt->data, pkt->size);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold int wv_write_trailer(AVFormatContext *ctx)
|
||
|
|
{
|
||
|
|
WvMuxContext *s = ctx->priv_data;
|
||
|
|
|
||
|
|
/* update total number of samples in the first block */
|
||
|
|
if (ctx->pb->seekable && s->samples &&
|
||
|
|
s->samples < UINT32_MAX) {
|
||
|
|
int64_t pos = avio_tell(ctx->pb);
|
||
|
|
avio_seek(ctx->pb, 12, SEEK_SET);
|
||
|
|
avio_wl32(ctx->pb, s->samples);
|
||
|
|
avio_seek(ctx->pb, pos, SEEK_SET);
|
||
|
|
}
|
||
|
|
|
||
|
|
ff_ape_write_tag(ctx);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
AVOutputFormat ff_wv_muxer = {
|
||
|
|
.name = "wv",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("raw WavPack"),
|
||
|
|
.mime_type = "audio/x-wavpack",
|
||
|
|
.extensions = "wv",
|
||
|
|
.priv_data_size = sizeof(WvMuxContext),
|
||
|
|
.audio_codec = AV_CODEC_ID_WAVPACK,
|
||
|
|
.video_codec = AV_CODEC_ID_NONE,
|
||
|
|
.write_header = wv_write_header,
|
||
|
|
.write_packet = wv_write_packet,
|
||
|
|
.write_trailer = wv_write_trailer,
|
||
|
|
.flags = AVFMT_NOTIMESTAMPS,
|
||
|
|
};
|