X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fflacdec.c;h=8abdd9d5b499ad44a1b68633f98bd82e39025f7c;hb=3c3b8003a13d9c3668c0bb6d79d2376da3b2b352;hp=e935c3f1683ffb88d11a9e012ce46d409ca9494d;hpb=66e5b1df360a28b083bc9ec5a76e7add5f40ce1f;p=ffmpeg diff --git a/libavformat/flacdec.c b/libavformat/flacdec.c index e935c3f1683..8abdd9d5b49 100644 --- a/libavformat/flacdec.c +++ b/libavformat/flacdec.c @@ -2,40 +2,42 @@ * 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 "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) { 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 = AVMEDIA_TYPE_AUDIO; - st->codec->codec_id = CODEC_ID_FLAC; + st->codec->codec_id = AV_CODEC_ID_FLAC; st->need_parsing = AVSTREAM_PARSE_FULL; /* the parameters will be extracted from the compressed bitstream */ @@ -48,11 +50,13 @@ static int flac_read_header(AVFormatContext *s, /* process metadata blocks */ while (!s->pb->eof_reached && !metadata_last) { avio_read(s->pb, header, 4); - ff_flac_parse_block_header(header, &metadata_last, &metadata_type, + 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) { @@ -65,13 +69,15 @@ static int flac_read_header(AVFormatContext *s, break; /* skip metadata block for unsupported types */ default: - ret = avio_seek(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); @@ -86,14 +92,47 @@ static int flac_read_header(AVFormatContext *s, st->codec->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->codec->extradata + 10) >> 4; + samples = (AV_RB64(st->codec->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 */ @@ -103,34 +142,53 @@ 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, &s->metadata, 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->codec->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; - - if(bufptr > end-4 || memcmp(bufptr, "fLaC", 4)) return 0; - else return AVPROBE_SCORE_MAX/2; + if (p->buf_size < 4 || memcmp(p->buf, "fLaC", 4)) + return 0; + return AVPROBE_SCORE_EXTENSION; } AVInputFormat ff_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, + .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, };