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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * WavPack muxer |
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| 3 | * Copyright (c) 2013 Konstantin Shishkov |
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| 4 | * Copyright (c) 2012 Paul B Mahol |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #include "libavutil/attributes.h" |
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| 24 | |||
| 25 | #include "apetag.h" |
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| 26 | #include "avformat.h" |
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| 27 | #include "wv.h" |
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| 28 | |||
| 29 | typedef struct WvMuxContext { |
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| 30 | int64_t samples; |
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| 31 | } WvMuxContext; |
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| 32 | |||
| 33 | static av_cold int wv_write_header(AVFormatContext *ctx) |
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| 34 | { |
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| 35 | if (ctx->nb_streams > 1 || |
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| 36 | ctx->streams[0]->codec->codec_id != AV_CODEC_ID_WAVPACK) { |
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| 37 | av_log(ctx, AV_LOG_ERROR, "This muxer only supports a single WavPack stream.\n"); |
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| 38 | return AVERROR(EINVAL); |
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| 39 | } |
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| 40 | |||
| 41 | return 0; |
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| 42 | } |
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| 43 | |||
| 44 | static int wv_write_packet(AVFormatContext *ctx, AVPacket *pkt) |
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| 45 | { |
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| 46 | WvMuxContext *s = ctx->priv_data; |
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| 47 | WvHeader header; |
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| 48 | int ret; |
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| 49 | |||
| 50 | if (pkt->size < WV_HEADER_SIZE || |
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| 51 | (ret = ff_wv_parse_header(&header, pkt->data)) < 0) { |
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| 52 | av_log(ctx, AV_LOG_ERROR, "Invalid WavPack packet.\n"); |
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| 53 | return AVERROR(EINVAL); |
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| 54 | } |
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| 55 | s->samples += header.samples; |
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| 56 | |||
| 57 | avio_write(ctx->pb, pkt->data, pkt->size); |
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| 58 | |||
| 59 | return 0; |
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| 60 | } |
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| 61 | |||
| 62 | static av_cold int wv_write_trailer(AVFormatContext *ctx) |
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| 63 | { |
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| 64 | WvMuxContext *s = ctx->priv_data; |
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| 65 | |||
| 66 | /* update total number of samples in the first block */ |
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| 67 | if (ctx->pb->seekable && s->samples && |
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| 68 | s->samples < UINT32_MAX) { |
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| 69 | int64_t pos = avio_tell(ctx->pb); |
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| 70 | avio_seek(ctx->pb, 12, SEEK_SET); |
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| 71 | avio_wl32(ctx->pb, s->samples); |
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| 72 | avio_seek(ctx->pb, pos, SEEK_SET); |
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| 73 | } |
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| 74 | |||
| 75 | ff_ape_write_tag(ctx); |
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| 76 | return 0; |
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| 77 | } |
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| 78 | |||
| 79 | AVOutputFormat ff_wv_muxer = { |
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| 80 | .name = "wv", |
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| 81 | .long_name = NULL_IF_CONFIG_SMALL("raw WavPack"), |
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| 82 | .mime_type = "audio/x-wavpack", |
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| 83 | .extensions = "wv", |
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| 84 | .priv_data_size = sizeof(WvMuxContext), |
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| 85 | .audio_codec = AV_CODEC_ID_WAVPACK, |
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| 86 | .video_codec = AV_CODEC_ID_NONE, |
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| 87 | .write_header = wv_write_header, |
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| 88 | .write_packet = wv_write_packet, |
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| 89 | .write_trailer = wv_write_trailer, |
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| 90 | .flags = AVFMT_NOTIMESTAMPS, |
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| 91 | }; |