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Rev | Author | Line No. | Line |
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6148 | 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 | };>>> |