X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fflacdec.c;h=2f4ac56040fa016cdb135823853ca7fd33f19eb2;hb=bfe92dfe60f601b3f20a918ffcc0acdf40a5955c;hp=d7f1e715d8a52536fb0315aa28a7cbbe7233a361;hpb=e4d2d8c5d720d84997a24178acd9553f23077c03;p=ffmpeg diff --git a/libavformat/flacdec.c b/libavformat/flacdec.c index d7f1e715d8a..2f4ac56040f 100644 --- a/libavformat/flacdec.c +++ b/libavformat/flacdec.c @@ -2,86 +2,82 @@ * Raw FLAC demuxer * Copyright (c) 2001 Fabrice Bellard * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; 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 "raw.h" -#include "id3v2.h" +#include "flac_picture.h" +#include "internal.h" +#include "rawdec.h" #include "oggdec.h" +#include "vorbiscomment.h" +#include "replaygain.h" -static int flac_read_header(AVFormatContext *s, - AVFormatParameters *ap) +static int flac_read_header(AVFormatContext *s) { - uint8_t buf[ID3v2_HEADER_SIZE]; int ret, metadata_last=0, metadata_type, metadata_size, found_streaminfo=0; uint8_t header[4]; uint8_t *buffer=NULL; - AVStream *st = av_new_stream(s, 0); + AVStream *st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); - st->codec->codec_type = CODEC_TYPE_AUDIO; - st->codec->codec_id = CODEC_ID_FLAC; + st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; + st->codecpar->codec_id = AV_CODEC_ID_FLAC; st->need_parsing = AVSTREAM_PARSE_FULL; /* the parameters will be extracted from the compressed bitstream */ - /* skip ID3v2 header if found */ - ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE); - if (ret == ID3v2_HEADER_SIZE && ff_id3v2_match(buf)) { - int len = ff_id3v2_tag_len(buf); - url_fseek(s->pb, len - ID3v2_HEADER_SIZE, SEEK_CUR); - } else { - url_fseek(s->pb, 0, SEEK_SET); - } - /* if fLaC marker is not found, assume there is no header */ - if (get_le32(s->pb) != MKTAG('f','L','a','C')) { - url_fseek(s->pb, -4, SEEK_CUR); + 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) { - get_buffer(s->pb, header, 4); - ff_flac_parse_block_header(header, &metadata_last, &metadata_type, + while (!s->pb->eof_reached && !metadata_last) { + avio_read(s->pb, header, 4); + 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); + buffer = av_mallocz(metadata_size + AV_INPUT_BUFFER_PADDING_SIZE); if (!buffer) { - return AVERROR_NOMEM; + return AVERROR(ENOMEM); } - if (get_buffer(s->pb, buffer, metadata_size) != metadata_size) { + if (avio_read(s->pb, buffer, metadata_size) != metadata_size) { av_freep(&buffer); - return AVERROR_IO; + return AVERROR(EIO); } break; /* skip metadata block for unsupported types */ default: - ret = url_fseek(s->pb, metadata_size, SEEK_CUR); + ret = avio_skip(s->pb, metadata_size); if (ret < 0) return ret; } if (metadata_type == FLAC_METADATA_TYPE_STREAMINFO) { - FLACStreaminfo si; + uint32_t samplerate; + uint64_t samples; + /* STREAMINFO can only occur once */ if (found_streaminfo) { av_freep(&buffer); @@ -92,18 +88,51 @@ static int flac_read_header(AVFormatContext *s, return AVERROR_INVALIDDATA; } found_streaminfo = 1; - st->codec->extradata = buffer; - st->codec->extradata_size = metadata_size; + st->codecpar->extradata = buffer; + st->codecpar->extradata_size = metadata_size; buffer = NULL; - /* get codec params from STREAMINFO header */ - ff_flac_parse_streaminfo(st->codec, &si, st->codec->extradata); + /* get sample rate and sample count from STREAMINFO header; + * other parameters will be extracted by the parser */ + samplerate = AV_RB24(st->codecpar->extradata + 10) >> 4; + samples = (AV_RB64(st->codecpar->extradata + 13) >> 24) & ((1ULL << 36) - 1); /* set time base and duration */ - if (si.samplerate > 0) { - av_set_pts_info(st, 64, 1, si.samplerate); - if (si.samples > 0) - st->duration = si.samples; + if (samplerate > 0) { + avpriv_set_pts_info(st, 64, 1, samplerate); + if (samples > 0) + st->duration = 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 AVERROR_INVALIDDATA; + offset = buffer + 395; + chapters = bytestream_get_byte(&offset) - 1; + if (chapters <= 0) + return AVERROR_INVALIDDATA; + for (i = 0; i < chapters; i++) { + if (offset + 36 - buffer > metadata_size) + return 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 AVERROR_INVALIDDATA; + offset += ti * 12; + avpriv_new_chapter(s, track, st->time_base, start, AV_NOPTS_VALUE, isrc); + } + } 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 */ @@ -113,38 +142,68 @@ static int flac_read_header(AVFormatContext *s, } /* process supported blocks other than STREAMINFO */ if (metadata_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) { - if (ff_vorbis_comment(s, buffer, metadata_size)) { + AVDictionaryEntry *chmask; + + ret = ff_vorbis_comment(s, &s->metadata, buffer, metadata_size, 1); + if (ret < 0) { av_log(s, AV_LOG_WARNING, "error parsing VorbisComment metadata\n"); + } else if (ret > 0) { + s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED; + } + + /* parse the channels mask if present */ + chmask = av_dict_get(s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0); + if (chmask) { + uint64_t mask = strtol(chmask->value, NULL, 0); + if (!mask || mask & ~0x3ffffULL) { + av_log(s, AV_LOG_WARNING, + "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n"); + } else { + st->codecpar->channel_layout = mask; + av_dict_set(&s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0); + } } } av_freep(&buffer); } } + ret = ff_replaygain_export(st, s->metadata); + if (ret < 0) + return ret; + return 0; } static int flac_probe(AVProbeData *p) { - uint8_t *bufptr = p->buf; - uint8_t *end = p->buf + p->buf_size; + /* file header + metadata header + checked bytes of streaminfo */ + if (p->buf_size >= 4 + 4 + 13) { + int type = p->buf[4] & 0x7f; + int size = AV_RB24(p->buf + 5); + int min_block_size = AV_RB16(p->buf + 8); + int max_block_size = AV_RB16(p->buf + 10); + int sample_rate = AV_RB24(p->buf + 18) >> 4; - if(ff_id3v2_match(bufptr)) - bufptr += ff_id3v2_tag_len(bufptr); + if (!memcmp(p->buf, "fLaC", 4) && + type == FLAC_METADATA_TYPE_STREAMINFO && + size == FLAC_STREAMINFO_SIZE && + min_block_size >= 16 && + max_block_size >= min_block_size && + sample_rate && sample_rate <= 655350) + return AVPROBE_SCORE_MAX; + } - if(bufptr > end-4 || memcmp(bufptr, "fLaC", 4)) return 0; - else return AVPROBE_SCORE_MAX/2; + return 0; } -AVInputFormat flac_demuxer = { - "flac", - NULL_IF_CONFIG_SMALL("raw FLAC"), - 0, - flac_probe, - flac_read_header, - ff_raw_read_partial_packet, - .flags= AVFMT_GENERIC_INDEX, - .extensions = "flac", - .value = CODEC_ID_FLAC, - .metadata_conv = ff_vorbiscomment_metadata_conv, +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, };