f4167842c1
More exactly: Not more than one stream of each type for which a default codec (i.e. AVOutputFormat.(audio|video|subtitle)_codec) is set; for those types for which no such codec is set (or for which no designated default codec in AVOutputFormat exists at all) no streams are permitted. Given that with this flag set the default codecs become more important, they are now set explicitly to AV_CODEC_ID_NONE for "unset"; the earlier code relied on AV_CODEC_ID_NONE being equal to zero, so that default static initialization set it accordingly; but this is not how one is supposed to use an enum. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
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* WavPack muxer
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* Copyright (c) 2013 Konstantin Shishkov <kostya.shishkov@gmail.com>
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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/attributes.h"
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#include "apetag.h"
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#include "avformat.h"
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#include "mux.h"
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#include "wv.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 av_cold int wv_init(AVFormatContext *ctx)
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{
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if (ctx->streams[0]->codecpar->codec_id != AV_CODEC_ID_WAVPACK) {
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av_log(ctx, AV_LOG_ERROR, "This muxer only supports a single WavPack stream.\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 wv_write_packet(AVFormatContext *ctx, AVPacket *pkt)
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{
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WvMuxContext *s = ctx->priv_data;
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WvHeader header;
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int ret;
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if (pkt->size < WV_HEADER_SIZE ||
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(ret = ff_wv_parse_header(&header, pkt->data)) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid WavPack packet.\n");
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return AVERROR(EINVAL);
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}
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s->samples += header.samples;
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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 av_cold int wv_write_trailer(AVFormatContext *ctx)
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{
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WvMuxContext *s = ctx->priv_data;
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/* update total number of samples in the first block */
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if ((ctx->pb->seekable & AVIO_SEEKABLE_NORMAL) && s->samples &&
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s->samples < UINT32_MAX) {
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int64_t pos = avio_tell(ctx->pb);
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avio_seek(ctx->pb, 12, SEEK_SET);
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avio_wl32(ctx->pb, s->samples);
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avio_seek(ctx->pb, pos, SEEK_SET);
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}
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ff_ape_write_tag(ctx);
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return 0;
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}
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const FFOutputFormat ff_wv_muxer = {
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.p.name = "wv",
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.p.long_name = NULL_IF_CONFIG_SMALL("raw WavPack"),
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.p.mime_type = "audio/x-wavpack",
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.p.extensions = "wv",
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.priv_data_size = sizeof(WvMuxContext),
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.p.audio_codec = AV_CODEC_ID_WAVPACK,
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.p.video_codec = AV_CODEC_ID_NONE,
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.p.subtitle_codec = AV_CODEC_ID_NONE,
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.init = wv_init,
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.write_packet = wv_write_packet,
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.write_trailer = wv_write_trailer,
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.p.flags = AVFMT_NOTIMESTAMPS,
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.flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH,
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};
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