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86 lines
2.4 KiB
86 lines
2.4 KiB
/* |
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* WavPack muxer |
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* Copyright (c) 2012 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/intreadwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "apetag.h" |
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typedef struct WVMuxContext { |
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int64_t samples; |
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} WVMuxContext; |
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static int write_header(AVFormatContext *s) |
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{ |
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AVCodecContext *codec = s->streams[0]->codec; |
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if (s->nb_streams > 1) { |
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av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); |
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return AVERROR(EINVAL); |
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} |
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if (codec->codec_id != AV_CODEC_ID_WAVPACK) { |
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av_log(s, AV_LOG_ERROR, "unsupported codec\n"); |
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return AVERROR(EINVAL); |
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} |
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return 0; |
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} |
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static int write_packet(AVFormatContext *ctx, AVPacket *pkt) |
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{ |
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WVMuxContext *s = ctx->priv_data; |
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if (pkt->size >= 24) |
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s->samples += AV_RL32(pkt->data + 20); |
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avio_write(ctx->pb, pkt->data, pkt->size); |
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return 0; |
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} |
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static int write_trailer(AVFormatContext *ctx) |
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{ |
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WVMuxContext *s = ctx->priv_data; |
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ff_ape_write(ctx); |
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if (ctx->pb->seekable && s->samples) { |
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avio_seek(ctx->pb, 12, SEEK_SET); |
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if (s->samples < 0xFFFFFFFFu) |
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avio_wl32(ctx->pb, s->samples); |
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else |
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avio_wl32(ctx->pb, 0xFFFFFFFFu); |
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avio_flush(ctx->pb); |
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} |
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return 0; |
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} |
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AVOutputFormat ff_wv_muxer = { |
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.name = "wv", |
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.long_name = NULL_IF_CONFIG_SMALL("WavPack"), |
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.priv_data_size = sizeof(WVMuxContext), |
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.extensions = "wv", |
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.audio_codec = AV_CODEC_ID_WAVPACK, |
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.video_codec = AV_CODEC_ID_NONE, |
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.write_header = write_header, |
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.write_packet = write_packet, |
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.write_trailer = write_trailer, |
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.flags = AVFMT_NOTIMESTAMPS, |
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};
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