repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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]->codec->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 && 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 | }; |