diff options
Diffstat (limited to 'ffmpeg/libavformat/flacdec.c')
| -rw-r--r-- | ffmpeg/libavformat/flacdec.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/ffmpeg/libavformat/flacdec.c b/ffmpeg/libavformat/flacdec.c deleted file mode 100644 index 29310b8..0000000 --- a/ffmpeg/libavformat/flacdec.c +++ /dev/null @@ -1,169 +0,0 @@ -/* - * Raw FLAC demuxer - * Copyright (c) 2001 Fabrice Bellard - * - * 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 "flac_picture.h" -#include "internal.h" -#include "rawdec.h" -#include "oggdec.h" -#include "vorbiscomment.h" -#include "libavcodec/bytestream.h" - -static int flac_read_header(AVFormatContext *s) -{ - int ret, metadata_last=0, metadata_type, metadata_size, found_streaminfo=0; - uint8_t header[4]; - uint8_t *buffer=NULL; - AVStream *st = avformat_new_stream(s, NULL); - if (!st) - return AVERROR(ENOMEM); - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - st->codec->codec_id = AV_CODEC_ID_FLAC; - st->need_parsing = AVSTREAM_PARSE_FULL_RAW; - /* the parameters will be extracted from the compressed bitstream */ - - /* if fLaC marker is not found, assume there is no header */ - if (avio_rl32(s->pb) != MKTAG('f','L','a','C')) { - avio_seek(s->pb, -4, SEEK_CUR); - return 0; - } - - /* process metadata blocks */ - while (!url_feof(s->pb) && !metadata_last) { - avio_read(s->pb, header, 4); - avpriv_flac_parse_block_header(header, &metadata_last, &metadata_type, - &metadata_size); - switch (metadata_type) { - /* allocate and read metadata block for supported types */ - case FLAC_METADATA_TYPE_STREAMINFO: - case FLAC_METADATA_TYPE_CUESHEET: - case FLAC_METADATA_TYPE_PICTURE: - case FLAC_METADATA_TYPE_VORBIS_COMMENT: - buffer = av_mallocz(metadata_size + FF_INPUT_BUFFER_PADDING_SIZE); - if (!buffer) { - return AVERROR(ENOMEM); - } - if (avio_read(s->pb, buffer, metadata_size) != metadata_size) { - RETURN_ERROR(AVERROR(EIO)); - } - break; - /* skip metadata block for unsupported types */ - default: - ret = avio_skip(s->pb, metadata_size); - if (ret < 0) - return ret; - } - - if (metadata_type == FLAC_METADATA_TYPE_STREAMINFO) { - FLACStreaminfo si; - /* STREAMINFO can only occur once */ - if (found_streaminfo) { - RETURN_ERROR(AVERROR_INVALIDDATA); - } - if (metadata_size != FLAC_STREAMINFO_SIZE) { - RETURN_ERROR(AVERROR_INVALIDDATA); - } - found_streaminfo = 1; - st->codec->extradata = buffer; - st->codec->extradata_size = metadata_size; - buffer = NULL; - - /* get codec params from STREAMINFO header */ - avpriv_flac_parse_streaminfo(st->codec, &si, st->codec->extradata); - - /* set time base and duration */ - if (si.samplerate > 0) { - avpriv_set_pts_info(st, 64, 1, si.samplerate); - if (si.samples > 0) - st->duration = si.samples; - } - } else if (metadata_type == FLAC_METADATA_TYPE_CUESHEET) { - uint8_t isrc[13]; - uint64_t start; - const uint8_t *offset; - int i, chapters, track, ti; - if (metadata_size < 431) - RETURN_ERROR(AVERROR_INVALIDDATA); - offset = buffer + 395; - chapters = bytestream_get_byte(&offset) - 1; - if (chapters <= 0) - RETURN_ERROR(AVERROR_INVALIDDATA); - for (i = 0; i < chapters; i++) { - if (offset + 36 - buffer > metadata_size) - RETURN_ERROR(AVERROR_INVALIDDATA); - start = bytestream_get_be64(&offset); - track = bytestream_get_byte(&offset); - bytestream_get_buffer(&offset, isrc, 12); - isrc[12] = 0; - offset += 14; - ti = bytestream_get_byte(&offset); - if (ti <= 0) RETURN_ERROR(AVERROR_INVALIDDATA); - offset += ti * 12; - avpriv_new_chapter(s, track, st->time_base, start, AV_NOPTS_VALUE, isrc); - } - av_freep(&buffer); - } else if (metadata_type == FLAC_METADATA_TYPE_PICTURE) { - ret = ff_flac_parse_picture(s, buffer, metadata_size); - av_freep(&buffer); - if (ret < 0) { - av_log(s, AV_LOG_ERROR, "Error parsing attached picture.\n"); - return ret; - } - } else { - /* STREAMINFO must be the first block */ - if (!found_streaminfo) { - RETURN_ERROR(AVERROR_INVALIDDATA); - } - /* process supported blocks other than STREAMINFO */ - if (metadata_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) { - if (ff_vorbis_comment(s, &s->metadata, buffer, metadata_size)) { - av_log(s, AV_LOG_WARNING, "error parsing VorbisComment metadata\n"); - } - } - av_freep(&buffer); - } - } - - return 0; - -fail: - av_free(buffer); - return ret; -} - -static int flac_probe(AVProbeData *p) -{ - if (p->buf_size < 4 || memcmp(p->buf, "fLaC", 4)) - return 0; - return AVPROBE_SCORE_EXTENSION; -} - -AVInputFormat ff_flac_demuxer = { - .name = "flac", - .long_name = NULL_IF_CONFIG_SMALL("raw FLAC"), - .read_probe = flac_probe, - .read_header = flac_read_header, - .read_packet = ff_raw_read_partial_packet, - .flags = AVFMT_GENERIC_INDEX, - .extensions = "flac", - .raw_codec_id = AV_CODEC_ID_FLAC, -}; |