X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Foggenc.c;h=8f8a08f1bdee6b7a3aa6321a6e5d93026a730231;hb=87de6ddb7b7674e329d5c96677bd8685bc7f7855;hp=fd886506299cfb3781767c3856cfc94d293800b3;hpb=b7f2fdde74608d848f943377c40d3df804c5f955;p=ffmpeg diff --git a/libavformat/oggenc.c b/libavformat/oggenc.c index fd886506299..8f8a08f1bde 100644 --- a/libavformat/oggenc.c +++ b/libavformat/oggenc.c @@ -2,24 +2,28 @@ * Ogg muxer * Copyright (c) 2007 Baptiste Coudurier * - * 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 + #include "libavutil/crc.h" +#include "libavutil/mathematics.h" +#include "libavutil/opt.h" #include "libavutil/random_seed.h" #include "libavcodec/xiph.h" #include "libavcodec/bytestream.h" @@ -31,7 +35,8 @@ #define MAX_PAGE_SIZE 65025 -typedef struct { +typedef struct OGGPage { + int64_t start_granule; int64_t granule; int stream_index; uint8_t flags; @@ -41,7 +46,7 @@ typedef struct { uint16_t size; } OGGPage; -typedef struct { +typedef struct OGGStreamContext { unsigned page_counter; uint8_t *header[3]; int header_len[3]; @@ -61,14 +66,39 @@ typedef struct OGGPageList { struct OGGPageList *next; } OGGPageList; -typedef struct { +typedef struct OGGContext { + const AVClass *class; OGGPageList *page_list; + int pref_size; ///< preferred page size (0 => fill all segments) + int64_t pref_duration; ///< preferred page duration (0 => fill all segments) + int serial_offset; } OGGContext; +#define OFFSET(x) offsetof(OGGContext, x) +#define PARAM AV_OPT_FLAG_ENCODING_PARAM + +static const AVOption options[] = { + { "serial_offset", "serial number offset", + OFFSET(serial_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, PARAM }, + { "pagesize", "preferred page size in bytes (deprecated)", + OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM }, + { "page_duration", "preferred page duration, in microseconds", + OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM }, + { NULL }, +}; + +#define OGG_CLASS(flavor)\ +static const AVClass flavor ## _muxer_class = {\ + .class_name = #flavor " muxer",\ + .item_name = av_default_item_name,\ + .option = options,\ + .version = LIBAVUTIL_VERSION_INT,\ +}; + static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset) { int64_t pos = avio_tell(pb); - uint32_t checksum = get_checksum(pb); + uint32_t checksum = ffio_get_checksum(pb); avio_seek(pb, crc_offset, SEEK_SET); avio_wb32(pb, checksum); avio_seek(pb, pos, SEEK_SET); @@ -82,10 +112,10 @@ static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags) int ret, size; uint8_t *buf; - ret = url_open_dyn_buf(&pb); + ret = avio_open_dyn_buf(&pb); if (ret < 0) return ret; - init_checksum(pb, ff_crc04C11DB7_update, 0); + ffio_init_checksum(pb, ff_crc04C11DB7_update, 0); ffio_wfourcc(pb, "OggS"); avio_w8(pb, 0); avio_w8(pb, page->flags | extra_flags); @@ -101,7 +131,7 @@ static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags) ogg_update_checksum(s, pb, crc_offset); avio_flush(pb); - size = url_close_dyn_buf(pb, &buf); + size = avio_close_dyn_buf(pb, &buf); if (size < 0) return size; @@ -156,6 +186,7 @@ static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream) return AVERROR(ENOMEM); l->page = oggstream->page; + oggstream->page.start_granule = oggstream->page.granule; oggstream->page_count++; ogg_reset_cur_page(oggstream); @@ -171,15 +202,17 @@ static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream) } static int ogg_buffer_data(AVFormatContext *s, AVStream *st, - uint8_t *data, unsigned size, int64_t granule) + uint8_t *data, unsigned size, int64_t granule, + int header) { OGGStreamContext *oggstream = st->priv_data; + OGGContext *ogg = s->priv_data; int total_segments = size / 255 + 1; uint8_t *p = data; int i, segments, len, flush = 0; // Handles VFR by flushing page because this frame needs to have a timestamp - if (st->codec->codec_id == CODEC_ID_THEORA && + if (st->codec->codec_id == AV_CODEC_ID_THEORA && !header && ogg_granule_to_timestamp(oggstream, granule) > ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1) { if (oggstream->page.granule != -1) @@ -187,6 +220,12 @@ static int ogg_buffer_data(AVFormatContext *s, AVStream *st, flush = 1; } + // avoid a continued page + if (!header && oggstream->page.size > 0 && + MAX_PAGE_SIZE - oggstream->page.size < size) { + ogg_buffer_page(s, oggstream); + } + for (i = 0; i < total_segments; ) { OGGPage *page = &oggstream->page; @@ -209,8 +248,19 @@ static int ogg_buffer_data(AVFormatContext *s, AVStream *st, if (i == total_segments) page->granule = granule; - if (page->segments_count == 255) { - ogg_buffer_page(s, oggstream); + if (!header) { + AVStream *st = s->streams[page->stream_index]; + + int64_t start = av_rescale_q(page->start_granule, st->time_base, + AV_TIME_BASE_Q); + int64_t next = av_rescale_q(page->granule, st->time_base, + AV_TIME_BASE_Q); + + if (page->segments_count == 255 || + (ogg->pref_size > 0 && page->size >= ogg->pref_size) || + (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) { + ogg_buffer_page(s, oggstream); + } } } @@ -221,23 +271,22 @@ static int ogg_buffer_data(AVFormatContext *s, AVStream *st, } static uint8_t *ogg_write_vorbiscomment(int offset, int bitexact, - int *header_len, AVMetadata **m, int framing_bit) + int *header_len, AVDictionary **m, int framing_bit) { - const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT; + const char *vendor = bitexact ? "Libav" : LIBAVFORMAT_IDENT; int size; uint8_t *p, *p0; - unsigned int count; ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL); - size = offset + ff_vorbiscomment_length(*m, vendor, &count) + framing_bit; + size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit; p = av_mallocz(size); if (!p) return NULL; p0 = p; p += offset; - ff_vorbiscomment_write(&p, m, vendor, count); + ff_vorbiscomment_write(&p, m, vendor); if (framing_bit) bytestream_put_byte(&p, 1); @@ -247,14 +296,12 @@ static uint8_t *ogg_write_vorbiscomment(int offset, int bitexact, static int ogg_build_flac_headers(AVCodecContext *avctx, OGGStreamContext *oggstream, int bitexact, - AVMetadata **m) + AVDictionary **m) { - enum FLACExtradataFormat format; - uint8_t *streaminfo; uint8_t *p; - if (!ff_flac_is_extradata_valid(avctx, &format, &streaminfo)) - return -1; + if (avctx->extradata_size < FLAC_STREAMINFO_SIZE) + return AVERROR(EINVAL); // first packet: STREAMINFO oggstream->header_len[0] = 51; @@ -270,7 +317,7 @@ static int ogg_build_flac_headers(AVCodecContext *avctx, bytestream_put_buffer(&p, "fLaC", 4); bytestream_put_byte(&p, 0x00); // streaminfo bytestream_put_be24(&p, 34); - bytestream_put_buffer(&p, streaminfo, FLAC_STREAMINFO_SIZE); + bytestream_put_buffer(&p, avctx->extradata, FLAC_STREAMINFO_SIZE); // second packet: VorbisComment p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0); @@ -287,7 +334,7 @@ static int ogg_build_flac_headers(AVCodecContext *avctx, static int ogg_build_speex_headers(AVCodecContext *avctx, OGGStreamContext *oggstream, int bitexact, - AVMetadata **m) + AVDictionary **m) { uint8_t *p; @@ -312,23 +359,82 @@ static int ogg_build_speex_headers(AVCodecContext *avctx, return 0; } +#define OPUS_HEADER_SIZE 19 + +static int ogg_build_opus_headers(AVCodecContext *avctx, + OGGStreamContext *oggstream, int bitexact, + AVDictionary **m) +{ + uint8_t *p; + + if (avctx->extradata_size < OPUS_HEADER_SIZE) + return -1; + + /* first packet: Opus header */ + p = av_mallocz(avctx->extradata_size); + if (!p) + return AVERROR(ENOMEM); + oggstream->header[0] = p; + oggstream->header_len[0] = avctx->extradata_size; + bytestream_put_buffer(&p, avctx->extradata, avctx->extradata_size); + + /* second packet: VorbisComment */ + p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0); + if (!p) + return AVERROR(ENOMEM); + oggstream->header[1] = p; + bytestream_put_buffer(&p, "OpusTags", 8); + + return 0; +} + +static void ogg_write_pages(AVFormatContext *s, int flush) +{ + OGGContext *ogg = s->priv_data; + OGGPageList *next, *p; + + if (!ogg->page_list) + return; + + for (p = ogg->page_list; p; ) { + OGGStreamContext *oggstream = + s->streams[p->page.stream_index]->priv_data; + if (oggstream->page_count < 2 && !flush) + break; + ogg_write_page(s, &p->page, + flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos + next = p->next; + av_freep(&p); + p = next; + } + ogg->page_list = p; +} + static int ogg_write_header(AVFormatContext *s) { + OGGContext *ogg = s->priv_data; OGGStreamContext *oggstream; int i, j; + if (ogg->pref_size) + av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n"); + for (i = 0; i < s->nb_streams; i++) { AVStream *st = s->streams[i]; - unsigned serial_num = i; + unsigned serial_num = i + ogg->serial_offset; if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) - av_set_pts_info(st, 64, 1, st->codec->sample_rate); - else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) - av_set_pts_info(st, 64, st->codec->time_base.num, st->codec->time_base.den); - if (st->codec->codec_id != CODEC_ID_VORBIS && - st->codec->codec_id != CODEC_ID_THEORA && - st->codec->codec_id != CODEC_ID_SPEEX && - st->codec->codec_id != CODEC_ID_FLAC) { + if (st->codec->codec_id == AV_CODEC_ID_OPUS) + /* Opus requires a fixed 48kHz clock */ + avpriv_set_pts_info(st, 64, 1, 48000); + else + avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); + + if (st->codec->codec_id != AV_CODEC_ID_VORBIS && + st->codec->codec_id != AV_CODEC_ID_THEORA && + st->codec->codec_id != AV_CODEC_ID_SPEEX && + st->codec->codec_id != AV_CODEC_ID_FLAC && + st->codec->codec_id != AV_CODEC_ID_OPUS) { av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i); return -1; } @@ -338,9 +444,11 @@ static int ogg_write_header(AVFormatContext *s) return -1; } oggstream = av_mallocz(sizeof(*oggstream)); + if (!oggstream) + return AVERROR(ENOMEM); oggstream->page.stream_index = i; - if (!(st->codec->flags & CODEC_FLAG_BITEXACT)) + if (!(s->flags & AVFMT_FLAG_BITEXACT)) do { serial_num = av_get_random_seed(); for (j = 0; j < i; j++) { @@ -352,49 +460,58 @@ static int ogg_write_header(AVFormatContext *s) oggstream->serial_num = serial_num; st->priv_data = oggstream; - if (st->codec->codec_id == CODEC_ID_FLAC) { + if (st->codec->codec_id == AV_CODEC_ID_FLAC) { int err = ogg_build_flac_headers(st->codec, oggstream, - st->codec->flags & CODEC_FLAG_BITEXACT, + s->flags & AVFMT_FLAG_BITEXACT, &s->metadata); if (err) { av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n"); av_freep(&st->priv_data); return err; } - } else if (st->codec->codec_id == CODEC_ID_SPEEX) { + } else if (st->codec->codec_id == AV_CODEC_ID_SPEEX) { int err = ogg_build_speex_headers(st->codec, oggstream, - st->codec->flags & CODEC_FLAG_BITEXACT, + s->flags & AVFMT_FLAG_BITEXACT, &s->metadata); if (err) { av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n"); av_freep(&st->priv_data); return err; } + } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) { + int err = ogg_build_opus_headers(st->codec, oggstream, + s->flags & AVFMT_FLAG_BITEXACT, + &s->metadata); + if (err) { + av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n"); + av_freep(&st->priv_data); + return err; + } } else { uint8_t *p; - const char *cstr = st->codec->codec_id == CODEC_ID_VORBIS ? "vorbis" : "theora"; - int header_type = st->codec->codec_id == CODEC_ID_VORBIS ? 3 : 0x81; - int framing_bit = st->codec->codec_id == CODEC_ID_VORBIS ? 1 : 0; + const char *cstr = st->codec->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora"; + int header_type = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81; + int framing_bit = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0; - if (ff_split_xiph_headers(st->codec->extradata, st->codec->extradata_size, - st->codec->codec_id == CODEC_ID_VORBIS ? 30 : 42, + if (avpriv_split_xiph_headers(st->codec->extradata, st->codec->extradata_size, + st->codec->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42, oggstream->header, oggstream->header_len) < 0) { av_log(s, AV_LOG_ERROR, "Extradata corrupted\n"); av_freep(&st->priv_data); return -1; } - p = ogg_write_vorbiscomment(7, st->codec->flags & CODEC_FLAG_BITEXACT, + p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT, &oggstream->header_len[1], &s->metadata, framing_bit); + oggstream->header[1] = p; if (!p) return AVERROR(ENOMEM); - oggstream->header[1] = p; bytestream_put_byte(&p, header_type); bytestream_put_buffer(&p, cstr, 6); - if (st->codec->codec_id == CODEC_ID_THEORA) { + if (st->codec->codec_id == AV_CODEC_ID_THEORA) { /** KFGSHIFT is the width of the less significant section of the granule position The less significant section is the frame count since the last keyframe */ oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5); @@ -408,7 +525,7 @@ static int ogg_write_header(AVFormatContext *s) for (j = 0; j < s->nb_streams; j++) { OGGStreamContext *oggstream = s->streams[j]->priv_data; ogg_buffer_data(s, s->streams[j], oggstream->header[0], - oggstream->header_len[0], 0); + oggstream->header_len[0], 0, 1); oggstream->page.flags |= 2; // bos ogg_buffer_page(s, oggstream); } @@ -416,45 +533,28 @@ static int ogg_write_header(AVFormatContext *s) AVStream *st = s->streams[j]; OGGStreamContext *oggstream = st->priv_data; for (i = 1; i < 3; i++) { - if (oggstream && oggstream->header_len[i]) + if (oggstream->header_len[i]) ogg_buffer_data(s, st, oggstream->header[i], - oggstream->header_len[i], 0); + oggstream->header_len[i], 0, 1); } ogg_buffer_page(s, oggstream); } - return 0; -} -static void ogg_write_pages(AVFormatContext *s, int flush) -{ - OGGContext *ogg = s->priv_data; - OGGPageList *next, *p; + oggstream->page.start_granule = AV_NOPTS_VALUE; - if (!ogg->page_list) - return; + ogg_write_pages(s, 2); - for (p = ogg->page_list; p; ) { - OGGStreamContext *oggstream = - s->streams[p->page.stream_index]->priv_data; - if (oggstream->page_count < 2 && !flush) - break; - ogg_write_page(s, &p->page, - flush && oggstream->page_count == 1 ? 4 : 0); // eos - next = p->next; - av_freep(&p); - p = next; - } - ogg->page_list = p; + return 0; } -static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt) +static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt) { AVStream *st = s->streams[pkt->stream_index]; OGGStreamContext *oggstream = st->priv_data; int ret; int64_t granule; - if (st->codec->codec_id == CODEC_ID_THEORA) { + if (st->codec->codec_id == AV_CODEC_ID_THEORA) { int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration; int pframe_count; if (pkt->flags & AV_PKT_FLAG_KEY) @@ -466,10 +566,18 @@ static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt) pframe_count = 0; } granule = (oggstream->last_kf_pts<kfgshift) | pframe_count; - } else + } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) + granule = pkt->pts + pkt->duration + + av_rescale_q(st->codec->initial_padding, + (AVRational){ 1, st->codec->sample_rate }, + st->time_base); + else granule = pkt->pts + pkt->duration; - ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule); + if (oggstream->page.start_granule == AV_NOPTS_VALUE) + oggstream->page.start_granule = pkt->pts; + + ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0); if (ret < 0) return ret; @@ -480,38 +588,118 @@ static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt) return 0; } +static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt) +{ + int i; + + if (pkt) + return ogg_write_packet_internal(s, pkt); + + for (i = 0; i < s->nb_streams; i++) { + OGGStreamContext *oggstream = s->streams[i]->priv_data; + if (oggstream->page.segments_count) + ogg_buffer_page(s, oggstream); + } + + ogg_write_pages(s, 2); + return 0; +} + static int ogg_write_trailer(AVFormatContext *s) { int i; - /* flush current page */ - for (i = 0; i < s->nb_streams; i++) - ogg_buffer_page(s, s->streams[i]->priv_data); + /* flush current page if needed */ + for (i = 0; i < s->nb_streams; i++) { + OGGStreamContext *oggstream = s->streams[i]->priv_data; + + if (oggstream->page.size > 0) + ogg_buffer_page(s, oggstream); + } ogg_write_pages(s, 1); for (i = 0; i < s->nb_streams; i++) { AVStream *st = s->streams[i]; OGGStreamContext *oggstream = st->priv_data; - if (st->codec->codec_id == CODEC_ID_FLAC || - st->codec->codec_id == CODEC_ID_SPEEX) { + if (st->codec->codec_id == AV_CODEC_ID_FLAC || + st->codec->codec_id == AV_CODEC_ID_SPEEX || + st->codec->codec_id == AV_CODEC_ID_OPUS) { av_free(oggstream->header[0]); - av_free(oggstream->header[1]); } + av_freep(&oggstream->header[1]); av_freep(&st->priv_data); } return 0; } +#if CONFIG_OGG_MUXER +OGG_CLASS(ogg) AVOutputFormat ff_ogg_muxer = { - "ogg", - NULL_IF_CONFIG_SMALL("Ogg"), - "application/ogg", - "ogg,ogv,spx", - sizeof(OGGContext), - CODEC_ID_FLAC, - CODEC_ID_THEORA, - ogg_write_header, - ogg_write_packet, - ogg_write_trailer, + .name = "ogg", + .long_name = NULL_IF_CONFIG_SMALL("Ogg"), + .mime_type = "application/ogg", + .extensions = "ogg,ogv", + .priv_data_size = sizeof(OGGContext), + .audio_codec = CONFIG_LIBVORBIS_ENCODER ? + AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC, + .video_codec = AV_CODEC_ID_THEORA, + .write_header = ogg_write_header, + .write_packet = ogg_write_packet, + .write_trailer = ogg_write_trailer, + .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, + .priv_class = &ogg_muxer_class, +}; +#endif + +#if CONFIG_OGA_MUXER +OGG_CLASS(oga) +AVOutputFormat ff_oga_muxer = { + .name = "oga", + .long_name = NULL_IF_CONFIG_SMALL("Ogg Audio"), + .mime_type = "audio/ogg", + .extensions = "oga", + .priv_data_size = sizeof(OGGContext), + .audio_codec = CONFIG_LIBVORBIS_ENCODER ? + AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC, + .write_header = ogg_write_header, + .write_packet = ogg_write_packet, + .write_trailer = ogg_write_trailer, + .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, + .priv_class = &oga_muxer_class, +}; +#endif + +#if CONFIG_SPX_MUXER +OGG_CLASS(spx) +AVOutputFormat ff_spx_muxer = { + .name = "spx", + .long_name = NULL_IF_CONFIG_SMALL("Ogg Speex"), + .mime_type = "audio/ogg", + .extensions = "spx", + .priv_data_size = sizeof(OGGContext), + .audio_codec = AV_CODEC_ID_SPEEX, + .write_header = ogg_write_header, + .write_packet = ogg_write_packet, + .write_trailer = ogg_write_trailer, + .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, + .priv_class = &spx_muxer_class, +}; +#endif + +#if CONFIG_OPUS_MUXER +OGG_CLASS(opus) +AVOutputFormat ff_opus_muxer = { + .name = "opus", + .long_name = NULL_IF_CONFIG_SMALL("Ogg Opus"), + .mime_type = "audio/ogg", + .extensions = "opus", + .priv_data_size = sizeof(OGGContext), + .audio_codec = AV_CODEC_ID_OPUS, + .write_header = ogg_write_header, + .write_packet = ogg_write_packet, + .write_trailer = ogg_write_trailer, + .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, + .priv_class = &opus_muxer_class, }; +#endif