| /* | |
| * Copyright (C) 2005 Michael Ahlberg, Måns Rullgård | |
| * | |
| * Permission is hereby granted, free of charge, to any person | |
| * obtaining a copy of this software and associated documentation | |
| * files (the "Software"), to deal in the Software without | |
| * restriction, including without limitation the rights to use, copy, | |
| * modify, merge, publish, distribute, sublicense, and/or sell copies | |
| * of the Software, and to permit persons to whom the Software is | |
| * furnished to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be | |
| * included in all copies or substantial portions of the Software. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | |
| * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
| * DEALINGS IN THE SOFTWARE. | |
| */ | |
| #include <stdlib.h> | |
| #include "libavutil/avstring.h" | |
| #include "libavutil/base64.h" | |
| #include "libavutil/dict.h" | |
| #include "libavcodec/bytestream.h" | |
| #include "libavcodec/vorbis_parser.h" | |
| #include "avformat.h" | |
| #include "demux.h" | |
| #include "flac_picture.h" | |
| #include "internal.h" | |
| #include "oggdec.h" | |
| #include "vorbiscomment.h" | |
| #include "replaygain.h" | |
| static int ogm_chapter(AVFormatContext *as, const uint8_t *key, const uint8_t *val) | |
| { | |
| int i, cnum, h, m, s, ms, keylen = strlen(key); | |
| AVChapter *chapter = NULL; | |
| if (keylen < 9 || av_strncasecmp(key, "CHAPTER", 7) || sscanf(key+7, "%03d", &cnum) != 1) | |
| return 0; | |
| if (keylen <= 10) { | |
| if (sscanf(val, "%02d:%02d:%02d.%03d", &h, &m, &s, &ms) < 4) | |
| return 0; | |
| avpriv_new_chapter(as, cnum, (AVRational) { 1, 1000 }, | |
| ms + 1000 * (s + 60 * (m + 60 * h)), | |
| AV_NOPTS_VALUE, NULL); | |
| } else if (!av_strcasecmp(key + keylen - 4, "NAME")) { | |
| for (i = 0; i < as->nb_chapters; i++) | |
| if (as->chapters[i]->id == cnum) { | |
| chapter = as->chapters[i]; | |
| break; | |
| } | |
| if (!chapter) | |
| return 0; | |
| av_dict_set(&chapter->metadata, "title", val, 0); | |
| } else | |
| return 0; | |
| return 1; | |
| } | |
| int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, | |
| const uint8_t *buf, int size) | |
| { | |
| int updates = ff_vorbis_comment(as, &st->metadata, buf, size, 1); | |
| if (updates > 0) { | |
| st->event_flags |= AVSTREAM_EVENT_FLAG_METADATA_UPDATED; | |
| } | |
| return updates; | |
| } | |
| /** | |
| * This function temporarily modifies the (const qualified) input buffer | |
| * and reverts its changes before return. The input buffer needs to have | |
| * at least one byte of padding. | |
| */ | |
| static int vorbis_parse_single_comment(AVFormatContext *as, AVDictionary **m, | |
| const uint8_t *buf, uint32_t size, | |
| int *updates, int parse_picture) | |
| { | |
| char *t = (char*)buf, *v = memchr(t, '=', size); | |
| int tl, vl; | |
| char backup; | |
| if (!v) | |
| return 0; | |
| tl = v - t; | |
| vl = size - tl - 1; | |
| v++; | |
| if (!tl || !vl) | |
| return 0; | |
| t[tl] = 0; | |
| backup = v[vl]; | |
| v[vl] = 0; | |
| /* The format in which the pictures are stored is the FLAC format. | |
| * Xiph says: "The binary FLAC picture structure is base64 encoded | |
| * and placed within a VorbisComment with the tag name | |
| * 'METADATA_BLOCK_PICTURE'. This is the preferred and | |
| * recommended way of embedding cover art within VorbisComments." | |
| */ | |
| if (!av_strcasecmp(t, "METADATA_BLOCK_PICTURE") && parse_picture) { | |
| int ret, len = AV_BASE64_DECODE_SIZE(vl); | |
| uint8_t *pict = av_malloc(len + AV_INPUT_BUFFER_PADDING_SIZE); | |
| if (!pict) { | |
| av_log(as, AV_LOG_WARNING, "out-of-memory error. Skipping cover art block.\n"); | |
| goto end; | |
| } | |
| ret = av_base64_decode(pict, v, len); | |
| if (ret > 0) | |
| ret = ff_flac_parse_picture(as, &pict, ret, 0); | |
| av_freep(&pict); | |
| if (ret < 0) { | |
| av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n"); | |
| goto end; | |
| } | |
| } else if (!ogm_chapter(as, t, v)) { | |
| (*updates)++; | |
| if (av_dict_get(*m, t, NULL, 0)) | |
| av_dict_set(m, t, ";", AV_DICT_APPEND); | |
| av_dict_set(m, t, v, AV_DICT_APPEND); | |
| } | |
| end: | |
| t[tl] = '='; | |
| v[vl] = backup; | |
| return 0; | |
| } | |
| int ff_vorbis_comment(AVFormatContext *as, AVDictionary **m, | |
| const uint8_t *buf, int size, | |
| int parse_picture) | |
| { | |
| const uint8_t *p = buf; | |
| const uint8_t *end = buf + size; | |
| int updates = 0; | |
| unsigned n; | |
| int s, ret; | |
| /* must have vendor_length and user_comment_list_length */ | |
| if (size < 8) | |
| return AVERROR_INVALIDDATA; | |
| s = bytestream_get_le32(&p); | |
| if (end - p - 4 < s || s < 0) | |
| return AVERROR_INVALIDDATA; | |
| p += s; | |
| n = bytestream_get_le32(&p); | |
| while (end - p >= 4 && n > 0) { | |
| s = bytestream_get_le32(&p); | |
| if (end - p < s || s < 0) | |
| break; | |
| ret = vorbis_parse_single_comment(as, m, p, s, &updates, parse_picture); | |
| if (ret < 0) | |
| return ret; | |
| p += s; | |
| n--; | |
| } | |
| if (p != end) | |
| av_log(as, AV_LOG_INFO, | |
| "%"PTRDIFF_SPECIFIER" bytes of comment header remain\n", end - p); | |
| if (n > 0) | |
| av_log(as, AV_LOG_INFO, | |
| "truncated comment header, %i comments not found\n", n); | |
| ff_metadata_conv(m, NULL, ff_vorbiscomment_metadata_conv); | |
| return updates; | |
| } | |
| /* | |
| * Parse the vorbis header | |
| * | |
| * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec | |
| * [vorbis_version] = read 32 bits as unsigned integer | Not used | |
| * [audio_channels] = read 8 bit integer as unsigned | Used | |
| * [audio_sample_rate] = read 32 bits as unsigned integer | Used | |
| * [bitrate_maximum] = read 32 bits as signed integer | Not used yet | |
| * [bitrate_nominal] = read 32 bits as signed integer | Not used yet | |
| * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate | |
| * [blocksize_0] = read 4 bits as unsigned integer | Not Used | |
| * [blocksize_1] = read 4 bits as unsigned integer | Not Used | |
| * [framing_flag] = read one bit | Not Used | |
| */ | |
| struct oggvorbis_private { | |
| unsigned int len[3]; | |
| unsigned char *packet[3]; | |
| AVVorbisParseContext *vp; | |
| int64_t final_pts; | |
| int final_duration; | |
| }; | |
| static int fixup_vorbis_headers(AVFormatContext *as, | |
| struct oggvorbis_private *priv, | |
| uint8_t **buf) | |
| { | |
| int i, offset, len, err; | |
| int buf_len; | |
| unsigned char *ptr; | |
| len = priv->len[0] + priv->len[1] + priv->len[2]; | |
| buf_len = len + len / 255 + 64; | |
| if (*buf) | |
| return AVERROR_INVALIDDATA; | |
| ptr = *buf = av_realloc(NULL, buf_len); | |
| if (!ptr) | |
| return AVERROR(ENOMEM); | |
| memset(*buf, '\0', buf_len); | |
| ptr[0] = 2; | |
| offset = 1; | |
| offset += av_xiphlacing(&ptr[offset], priv->len[0]); | |
| offset += av_xiphlacing(&ptr[offset], priv->len[1]); | |
| for (i = 0; i < 3; i++) { | |
| memcpy(&ptr[offset], priv->packet[i], priv->len[i]); | |
| offset += priv->len[i]; | |
| av_freep(&priv->packet[i]); | |
| } | |
| if ((err = av_reallocp(buf, offset + AV_INPUT_BUFFER_PADDING_SIZE)) < 0) | |
| return err; | |
| return offset; | |
| } | |
| static void vorbis_cleanup(AVFormatContext *s, int idx) | |
| { | |
| struct ogg *ogg = s->priv_data; | |
| struct ogg_stream *os = ogg->streams + idx; | |
| struct oggvorbis_private *priv = os->private; | |
| int i; | |
| if (os->private) { | |
| av_vorbis_parse_free(&priv->vp); | |
| for (i = 0; i < 3; i++) | |
| av_freep(&priv->packet[i]); | |
| } | |
| } | |
| static int vorbis_update_metadata(AVFormatContext *s, int idx) | |
| { | |
| struct ogg *ogg = s->priv_data; | |
| struct ogg_stream *os = ogg->streams + idx; | |
| AVStream *st = s->streams[idx]; | |
| int ret; | |
| if (os->psize <= 8) | |
| return 0; | |
| /* New metadata packet; release old data. */ | |
| av_dict_free(&st->metadata); | |
| ret = ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 7, | |
| os->psize - 8); | |
| if (ret < 0) | |
| return ret; | |
| /* Update the metadata if possible. */ | |
| av_freep(&os->new_metadata); | |
| if (st->metadata) { | |
| os->new_metadata = av_packet_pack_dictionary(st->metadata, &os->new_metadata_size); | |
| /* Send an empty dictionary to indicate that metadata has been cleared. */ | |
| } else { | |
| os->new_metadata = av_mallocz(1); | |
| os->new_metadata_size = 0; | |
| } | |
| return ret; | |
| } | |
| static int vorbis_header(AVFormatContext *s, int idx) | |
| { | |
| struct ogg *ogg = s->priv_data; | |
| AVStream *st = s->streams[idx]; | |
| struct ogg_stream *os = ogg->streams + idx; | |
| struct oggvorbis_private *priv; | |
| int pkt_type = os->buf[os->pstart]; | |
| if (!os->private) { | |
| os->private = av_mallocz(sizeof(struct oggvorbis_private)); | |
| if (!os->private) | |
| return AVERROR(ENOMEM); | |
| } | |
| priv = os->private; | |
| if (!(pkt_type & 1)) | |
| return priv->vp ? 0 : AVERROR_INVALIDDATA; | |
| if (pkt_type > 5) { | |
| av_log(s, AV_LOG_VERBOSE, "Ignoring packet with unknown type %d\n", pkt_type); | |
| return 1; | |
| } | |
| if (os->psize < 1) | |
| return AVERROR_INVALIDDATA; | |
| if (priv->packet[pkt_type >> 1]) | |
| return AVERROR_INVALIDDATA; | |
| if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1]) | |
| return priv->vp ? 0 : AVERROR_INVALIDDATA; | |
| priv->len[pkt_type >> 1] = os->psize; | |
| priv->packet[pkt_type >> 1] = av_memdup(os->buf + os->pstart, os->psize); | |
| if (!priv->packet[pkt_type >> 1]) | |
| return AVERROR(ENOMEM); | |
| if (os->buf[os->pstart] == 1) { | |
| const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */ | |
| unsigned blocksize, bs0, bs1; | |
| int srate; | |
| int channels; | |
| if (os->psize != 30) | |
| return AVERROR_INVALIDDATA; | |
| if (bytestream_get_le32(&p) != 0) /* vorbis_version */ | |
| return AVERROR_INVALIDDATA; | |
| channels = bytestream_get_byte(&p); | |
| if (st->codecpar->ch_layout.nb_channels && | |
| channels != st->codecpar->ch_layout.nb_channels) { | |
| av_log(s, AV_LOG_ERROR, "Channel change is not supported\n"); | |
| return AVERROR_PATCHWELCOME; | |
| } | |
| st->codecpar->ch_layout.nb_channels = channels; | |
| srate = bytestream_get_le32(&p); | |
| p += 4; // skip maximum bitrate | |
| st->codecpar->bit_rate = bytestream_get_le32(&p); // nominal bitrate | |
| p += 4; // skip minimum bitrate | |
| blocksize = bytestream_get_byte(&p); | |
| bs0 = blocksize & 15; | |
| bs1 = blocksize >> 4; | |
| if (bs0 > bs1) | |
| return AVERROR_INVALIDDATA; | |
| if (bs0 < 6 || bs1 > 13) | |
| return AVERROR_INVALIDDATA; | |
| if (bytestream_get_byte(&p) != 1) /* framing_flag */ | |
| return AVERROR_INVALIDDATA; | |
| st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| st->codecpar->codec_id = AV_CODEC_ID_VORBIS; | |
| if (srate > 0) { | |
| st->codecpar->sample_rate = srate; | |
| avpriv_set_pts_info(st, 64, 1, srate); | |
| } | |
| } else if (os->buf[os->pstart] == 3) { | |
| if (vorbis_update_metadata(s, idx) >= 0 && priv->len[1] > 10) { | |
| unsigned new_len; | |
| int ret = ff_replaygain_export(st, st->metadata); | |
| if (ret < 0) | |
| return ret; | |
| // drop all metadata we parsed and which is not required by libvorbis | |
| new_len = 7 + 4 + AV_RL32(priv->packet[1] + 7) + 4 + 1; | |
| if (new_len >= 16 && new_len < os->psize) { | |
| AV_WL32(priv->packet[1] + new_len - 5, 0); | |
| priv->packet[1][new_len - 1] = 1; | |
| priv->len[1] = new_len; | |
| } | |
| } | |
| } else { | |
| int ret; | |
| if (priv->vp) | |
| return AVERROR_INVALIDDATA; | |
| ret = fixup_vorbis_headers(s, priv, &st->codecpar->extradata); | |
| if (ret < 0) { | |
| st->codecpar->extradata_size = 0; | |
| return ret; | |
| } | |
| st->codecpar->extradata_size = ret; | |
| priv->vp = av_vorbis_parse_init(st->codecpar->extradata, st->codecpar->extradata_size); | |
| if (!priv->vp) { | |
| av_freep(&st->codecpar->extradata); | |
| st->codecpar->extradata_size = 0; | |
| return AVERROR_UNKNOWN; | |
| } | |
| } | |
| return 1; | |
| } | |
| static int vorbis_packet(AVFormatContext *s, int idx) | |
| { | |
| struct ogg *ogg = s->priv_data; | |
| struct ogg_stream *os = ogg->streams + idx; | |
| struct oggvorbis_private *priv = os->private; | |
| int duration, flags = 0; | |
| if (!priv->vp) | |
| return AVERROR_INVALIDDATA; | |
| /* first packet handling | |
| * here we parse the duration of each packet in the first page and compare | |
| * the total duration to the page granule to find the encoder delay and | |
| * set the first timestamp */ | |
| if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS) && (int64_t)os->granule>=0) { | |
| int seg, d; | |
| uint8_t *last_pkt = os->buf + os->pstart; | |
| uint8_t *next_pkt = last_pkt; | |
| av_vorbis_parse_reset(priv->vp); | |
| duration = 0; | |
| seg = os->segp; | |
| d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags); | |
| if (d < 0) { | |
| os->pflags |= AV_PKT_FLAG_CORRUPT; | |
| return 0; | |
| } else if (flags & VORBIS_FLAG_COMMENT) { | |
| vorbis_update_metadata(s, idx); | |
| flags = 0; | |
| } | |
| duration += d; | |
| last_pkt = next_pkt = next_pkt + os->psize; | |
| for (; seg < os->nsegs; seg++) { | |
| if (os->segments[seg] < 255) { | |
| int d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags); | |
| if (d < 0) { | |
| duration = os->granule; | |
| break; | |
| } else if (flags & VORBIS_FLAG_COMMENT) { | |
| vorbis_update_metadata(s, idx); | |
| flags = 0; | |
| } | |
| duration += d; | |
| last_pkt = next_pkt + os->segments[seg]; | |
| } | |
| next_pkt += os->segments[seg]; | |
| } | |
| os->lastpts = | |
| os->lastdts = os->granule - duration; | |
| if (!os->granule && duration) //hack to deal with broken files (Ticket3710) | |
| os->lastpts = os->lastdts = AV_NOPTS_VALUE; | |
| if (s->streams[idx]->start_time == AV_NOPTS_VALUE) { | |
| s->streams[idx]->start_time = FFMAX(os->lastpts, 0); | |
| if (s->streams[idx]->duration != AV_NOPTS_VALUE) | |
| s->streams[idx]->duration -= s->streams[idx]->start_time; | |
| } | |
| priv->final_pts = AV_NOPTS_VALUE; | |
| av_vorbis_parse_reset(priv->vp); | |
| } | |
| /* parse packet duration */ | |
| if (os->psize > 0) { | |
| duration = av_vorbis_parse_frame_flags(priv->vp, os->buf + os->pstart, 1, &flags); | |
| if (duration < 0) { | |
| os->pflags |= AV_PKT_FLAG_CORRUPT; | |
| return 0; | |
| } else if (flags & VORBIS_FLAG_COMMENT) { | |
| vorbis_update_metadata(s, idx); | |
| flags = 0; | |
| } | |
| os->pduration = duration; | |
| } | |
| /* final packet handling | |
| * here we save the pts of the first packet in the final page, sum up all | |
| * packet durations in the final page except for the last one, and compare | |
| * to the page granule to find the duration of the final packet */ | |
| if (os->flags & OGG_FLAG_EOS) { | |
| if (os->lastpts != AV_NOPTS_VALUE) { | |
| priv->final_pts = os->lastpts; | |
| priv->final_duration = 0; | |
| } | |
| if (os->segp == os->nsegs) { | |
| int64_t skip = priv->final_pts + priv->final_duration + os->pduration - os->granule; | |
| if (skip > 0) | |
| os->end_trimming = skip; | |
| os->pduration = os->granule - priv->final_pts - priv->final_duration; | |
| } | |
| priv->final_duration += os->pduration; | |
| } | |
| return 0; | |
| } | |
| const struct ogg_codec ff_vorbis_codec = { | |
| .magic = "\001vorbis", | |
| .magicsize = 7, | |
| .header = vorbis_header, | |
| .packet = vorbis_packet, | |
| .cleanup = vorbis_cleanup, | |
| .nb_header = 3, | |
| }; |