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95 lines
2.7 KiB
95 lines
2.7 KiB
/* |
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* raw FLAC muxer |
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* Copyright (c) 2006-2009 Justin Ruggles |
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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 "libavcodec/flac.h" |
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#include "avformat.h" |
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#include "flacenc.h" |
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int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec) |
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{ |
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static const uint8_t header[8] = { |
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0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22 |
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}; |
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uint8_t *streaminfo; |
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enum FLACExtradataFormat format; |
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if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo)) |
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return -1; |
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/* write "fLaC" stream marker and first metadata block header if needed */ |
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if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) { |
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put_buffer(pb, header, 8); |
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} |
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/* write STREAMINFO or full header */ |
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put_buffer(pb, codec->extradata, codec->extradata_size); |
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return 0; |
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} |
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static int flac_write_header(struct AVFormatContext *s) |
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{ |
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return ff_flac_write_header(s->pb, s->streams[0]->codec); |
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} |
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static int flac_write_trailer(struct AVFormatContext *s) |
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{ |
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ByteIOContext *pb = s->pb; |
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uint8_t *streaminfo; |
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enum FLACExtradataFormat format; |
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int64_t file_size; |
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if (!ff_flac_is_extradata_valid(s->streams[0]->codec, &format, &streaminfo)) |
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return -1; |
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if (!url_is_streamed(pb)) { |
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/* rewrite the STREAMINFO header block data */ |
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file_size = url_ftell(pb); |
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url_fseek(pb, 8, SEEK_SET); |
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put_buffer(pb, streaminfo, FLAC_STREAMINFO_SIZE); |
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url_fseek(pb, file_size, SEEK_SET); |
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put_flush_packet(pb); |
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} else { |
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av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n"); |
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} |
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return 0; |
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} |
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static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
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{ |
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put_buffer(s->pb, pkt->data, pkt->size); |
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put_flush_packet(s->pb); |
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return 0; |
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} |
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AVOutputFormat flac_muxer = { |
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"flac", |
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NULL_IF_CONFIG_SMALL("raw FLAC"), |
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"audio/x-flac", |
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"flac", |
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0, |
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CODEC_ID_FLAC, |
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CODEC_ID_NONE, |
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flac_write_header, |
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flac_write_packet, |
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flac_write_trailer, |
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.flags= AVFMT_NOTIMESTAMPS, |
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};
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