/* * 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]->codecpar->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, };