diff options
author | Paul B Mahol <onemda@gmail.com> | 2012-02-06 23:50:09 +0400 |
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committer | Paul B Mahol <onemda@gmail.com> | 2012-07-29 05:28:12 +0400 |
commit | a3a0774be823ba218f494d3a78de546599d600e2 (patch) | |
tree | ca4c900b2240d61f654d2e7ad16666a4db70b5e9 /libavformat/wvenc.c | |
parent | 706bd8ea19a6f723795547885714033ac68a4d74 (diff) |
WavPack muxer
Diffstat (limited to 'libavformat/wvenc.c')
-rw-r--r-- | libavformat/wvenc.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/libavformat/wvenc.c b/libavformat/wvenc.c new file mode 100644 index 0000000000..7709a2e268 --- /dev/null +++ b/libavformat/wvenc.c @@ -0,0 +1,97 @@ +/* + * 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 "avformat.h" +#include "internal.h" +#include "avio_internal.h" + +typedef struct{ + uint32_t duration; + int off; +} WVMuxContext; + +static int write_header(AVFormatContext *s) +{ + WVMuxContext *wc = s->priv_data; + 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 != 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; + } + wc->off = codec->channels > 2 ? 4 : 0; + 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; + AVIOContext *pb = s->pb; + + wc->duration += pkt->duration; + ffio_wfourcc(pb, "wvpk"); + avio_wl32(pb, pkt->size + 12 + wc->off); + avio_wl16(pb, 0x410); + avio_w8(pb, 0); + avio_w8(pb, 0); + avio_wl32(pb, -1); + avio_wl32(pb, pkt->pts); + avio_write(s->pb, pkt->data, pkt->size); + avio_flush(s->pb); + + return 0; +} + +static int write_trailer(AVFormatContext *s) +{ + WVMuxContext *wc = s->priv_data; + AVIOContext *pb = s->pb; + + 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 = CODEC_ID_WAVPACK, + .video_codec = CODEC_ID_NONE, + .write_header = write_header, + .write_packet = write_packet, + .write_trailer = write_trailer, +}; |