3 * Copyright (c) 2013 Kostya Shishkov <kostya.shishkov@gmail.com>
4 * Copyright (c) 2012 Paul B Mahol
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/attributes.h"
30 typedef struct WvMuxContext {
34 static av_cold int wv_write_header(AVFormatContext *ctx)
36 if (ctx->nb_streams > 1 ||
37 ctx->streams[0]->codec->codec_id != AV_CODEC_ID_WAVPACK) {
38 av_log(ctx, AV_LOG_ERROR, "This muxer only supports a single WavPack stream.\n");
39 return AVERROR(EINVAL);
45 static int wv_write_packet(AVFormatContext *ctx, AVPacket *pkt)
47 WvMuxContext *s = ctx->priv_data;
51 if (pkt->size < WV_HEADER_SIZE ||
52 (ret = ff_wv_parse_header(&header, pkt->data)) < 0) {
53 av_log(ctx, AV_LOG_ERROR, "Invalid WavPack packet.\n");
54 return AVERROR(EINVAL);
56 s->samples += header.samples;
58 avio_write(ctx->pb, pkt->data, pkt->size);
64 static av_cold int wv_write_trailer(AVFormatContext *ctx)
66 WvMuxContext *s = ctx->priv_data;
68 /* update total number of samples in the first block */
69 if (ctx->pb->seekable && s->samples &&
70 s->samples < UINT32_MAX) {
71 int64_t pos = avio_tell(ctx->pb);
72 avio_seek(ctx->pb, 12, SEEK_SET);
73 avio_wl32(ctx->pb, s->samples);
74 avio_seek(ctx->pb, pos, SEEK_SET);
77 ff_ape_write_tag(ctx);
81 AVOutputFormat ff_wv_muxer = {
83 .long_name = NULL_IF_CONFIG_SMALL("raw WavPack"),
84 .mime_type = "audio/x-wavpack",
86 .priv_data_size = sizeof(WvMuxContext),
87 .audio_codec = AV_CODEC_ID_WAVPACK,
88 .video_codec = AV_CODEC_ID_NONE,
89 .write_header = wv_write_header,
90 .write_packet = wv_write_packet,
91 .write_trailer = wv_write_trailer,
92 .flags = AVFMT_NOTIMESTAMPS,