blob: 8743739e8dad62a14d38eeeae03b3bd35df31cb2
1 | /* |
2 | * WavPack muxer |
3 | * Copyright (c) 2013 Konstantin Shishkov <kostya.shishkov@gmail.com> |
4 | * Copyright (c) 2012 Paul B Mahol |
5 | * |
6 | * This file is part of FFmpeg. |
7 | * |
8 | * FFmpeg is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU Lesser General Public |
10 | * License as published by the Free Software Foundation; either |
11 | * version 2.1 of the License, or (at your option) any later version. |
12 | * |
13 | * FFmpeg is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU Lesser General Public |
19 | * License along with FFmpeg; if not, write to the Free Software |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
21 | */ |
22 | |
23 | #include "libavutil/attributes.h" |
24 | |
25 | #include "apetag.h" |
26 | #include "avformat.h" |
27 | #include "wv.h" |
28 | |
29 | typedef struct WvMuxContext { |
30 | int64_t samples; |
31 | } WvMuxContext; |
32 | |
33 | static av_cold int wv_write_header(AVFormatContext *ctx) |
34 | { |
35 | if (ctx->nb_streams > 1 || |
36 | ctx->streams[0]->codecpar->codec_id != AV_CODEC_ID_WAVPACK) { |
37 | av_log(ctx, AV_LOG_ERROR, "This muxer only supports a single WavPack stream.\n"); |
38 | return AVERROR(EINVAL); |
39 | } |
40 | |
41 | return 0; |
42 | } |
43 | |
44 | static int wv_write_packet(AVFormatContext *ctx, AVPacket *pkt) |
45 | { |
46 | WvMuxContext *s = ctx->priv_data; |
47 | WvHeader header; |
48 | int ret; |
49 | |
50 | if (pkt->size < WV_HEADER_SIZE || |
51 | (ret = ff_wv_parse_header(&header, pkt->data)) < 0) { |
52 | av_log(ctx, AV_LOG_ERROR, "Invalid WavPack packet.\n"); |
53 | return AVERROR(EINVAL); |
54 | } |
55 | s->samples += header.samples; |
56 | |
57 | avio_write(ctx->pb, pkt->data, pkt->size); |
58 | |
59 | return 0; |
60 | } |
61 | |
62 | static av_cold int wv_write_trailer(AVFormatContext *ctx) |
63 | { |
64 | WvMuxContext *s = ctx->priv_data; |
65 | |
66 | /* update total number of samples in the first block */ |
67 | if ((ctx->pb->seekable & AVIO_SEEKABLE_NORMAL) && s->samples && |
68 | s->samples < UINT32_MAX) { |
69 | int64_t pos = avio_tell(ctx->pb); |
70 | avio_seek(ctx->pb, 12, SEEK_SET); |
71 | avio_wl32(ctx->pb, s->samples); |
72 | avio_seek(ctx->pb, pos, SEEK_SET); |
73 | } |
74 | |
75 | ff_ape_write_tag(ctx); |
76 | return 0; |
77 | } |
78 | |
79 | AVOutputFormat ff_wv_muxer = { |
80 | .name = "wv", |
81 | .long_name = NULL_IF_CONFIG_SMALL("raw WavPack"), |
82 | .mime_type = "audio/x-wavpack", |
83 | .extensions = "wv", |
84 | .priv_data_size = sizeof(WvMuxContext), |
85 | .audio_codec = AV_CODEC_ID_WAVPACK, |
86 | .video_codec = AV_CODEC_ID_NONE, |
87 | .write_header = wv_write_header, |
88 | .write_packet = wv_write_packet, |
89 | .write_trailer = wv_write_trailer, |
90 | .flags = AVFMT_NOTIMESTAMPS, |
91 | }; |
92 |