* 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);
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 */
}
/* 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,
};
projects / ffmpeg / blobdiff