| /* |
| * raw FLAC muxer |
| * Copyright (c) 2006-2009 Justin Ruggles |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavcodec/flac.h" |
| #include "avformat.h" |
| #include "flacenc.h" |
| |
| int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec) |
| { |
| static const uint8_t header[8] = { |
| 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22 |
| }; |
| uint8_t *streaminfo; |
| enum FLACExtradataFormat format; |
| |
| if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo)) |
| return -1; |
| |
| /* write "fLaC" stream marker and first metadata block header if needed */ |
| if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) { |
| put_buffer(pb, header, 8); |
| } |
| |
| /* write STREAMINFO or full header */ |
| put_buffer(pb, codec->extradata, codec->extradata_size); |
| |
| return 0; |
| } |
| |
| static int flac_write_header(struct AVFormatContext *s) |
| { |
| return ff_flac_write_header(s->pb, s->streams[0]->codec); |
| } |
| |
| static int flac_write_trailer(struct AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->pb; |
| uint8_t *streaminfo; |
| enum FLACExtradataFormat format; |
| int64_t file_size; |
| |
| if (!ff_flac_is_extradata_valid(s->streams[0]->codec, &format, &streaminfo)) |
| return -1; |
| |
| if (!url_is_streamed(pb)) { |
| /* rewrite the STREAMINFO header block data */ |
| file_size = url_ftell(pb); |
| url_fseek(pb, 8, SEEK_SET); |
| put_buffer(pb, streaminfo, FLAC_STREAMINFO_SIZE); |
| url_fseek(pb, file_size, SEEK_SET); |
| put_flush_packet(pb); |
| } else { |
| av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n"); |
| } |
| return 0; |
| } |
| |
| static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
| { |
| put_buffer(s->pb, pkt->data, pkt->size); |
| put_flush_packet(s->pb); |
| return 0; |
| } |
| |
| AVOutputFormat flac_muxer = { |
| "flac", |
| NULL_IF_CONFIG_SMALL("raw FLAC"), |
| "audio/x-flac", |
| "flac", |
| 0, |
| CODEC_ID_FLAC, |
| CODEC_ID_NONE, |
| flac_write_header, |
| flac_write_packet, |
| flac_write_trailer, |
| .flags= AVFMT_NOTIMESTAMPS, |
| }; |