diff options
Diffstat (limited to 'ffmpeg1/libavformat/oggenc.c')
| -rw-r--r-- | ffmpeg1/libavformat/oggenc.c | 636 |
1 files changed, 636 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/oggenc.c b/ffmpeg1/libavformat/oggenc.c new file mode 100644 index 0000000..3d4519c --- /dev/null +++ b/ffmpeg1/libavformat/oggenc.c @@ -0,0 +1,636 @@ +/* + * Ogg muxer + * Copyright (c) 2007 Baptiste Coudurier <baptiste dot coudurier at free dot fr> + * + * This file is part of FFmpeg. + * + * FFmpeg 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, + * 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 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/crc.h" +#include "libavutil/opt.h" +#include "libavutil/mathematics.h" +#include "libavutil/opt.h" +#include "libavutil/random_seed.h" +#include "libavcodec/xiph.h" +#include "libavcodec/bytestream.h" +#include "libavcodec/flac.h" +#include "avformat.h" +#include "avio_internal.h" +#include "internal.h" +#include "vorbiscomment.h" + +#define MAX_PAGE_SIZE 65025 + +typedef struct { + int64_t start_granule; + int64_t granule; + int stream_index; + uint8_t flags; + uint8_t segments_count; + uint8_t segments[255]; + uint8_t data[MAX_PAGE_SIZE]; + uint16_t size; +} OGGPage; + +typedef struct { + unsigned page_counter; + uint8_t *header[3]; + int header_len[3]; + /** for theora granule */ + int kfgshift; + int64_t last_kf_pts; + int vrev; + int eos; + unsigned page_count; ///< number of page buffered + OGGPage page; ///< current page + unsigned serial_num; ///< serial number + int64_t last_granule; ///< last packet granule +} OGGStreamContext; + +typedef struct OGGPageList { + OGGPage page; + struct OGGPageList *next; +} OGGPageList; + +typedef struct { + 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) +} OGGContext; + +#define OFFSET(x) offsetof(OGGContext, x) +#define PARAM AV_OPT_FLAG_ENCODING_PARAM + +static const AVOption options[] = { + { "oggpagesize", "Set preferred Ogg page size.", + offsetof(OGGContext, pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, AV_OPT_FLAG_ENCODING_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_INT, { .i64 = 1000000 }, 0, INT64_MAX, PARAM }, + { NULL }, +}; + +static const AVClass ogg_muxer_class = { + .class_name = "Ogg 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 = ffio_get_checksum(pb); + avio_seek(pb, crc_offset, SEEK_SET); + avio_wb32(pb, checksum); + avio_seek(pb, pos, SEEK_SET); +} + +static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags) +{ + OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data; + AVIOContext *pb; + int64_t crc_offset; + int ret, size; + uint8_t *buf; + + ret = avio_open_dyn_buf(&pb); + if (ret < 0) + return ret; + ffio_init_checksum(pb, ff_crc04C11DB7_update, 0); + ffio_wfourcc(pb, "OggS"); + avio_w8(pb, 0); + avio_w8(pb, page->flags | extra_flags); + avio_wl64(pb, page->granule); + avio_wl32(pb, oggstream->serial_num); + avio_wl32(pb, oggstream->page_counter++); + crc_offset = avio_tell(pb); + avio_wl32(pb, 0); // crc + avio_w8(pb, page->segments_count); + avio_write(pb, page->segments, page->segments_count); + avio_write(pb, page->data, page->size); + + ogg_update_checksum(s, pb, crc_offset); + avio_flush(pb); + + size = avio_close_dyn_buf(pb, &buf); + if (size < 0) + return size; + + avio_write(s->pb, buf, size); + avio_flush(s->pb); + av_free(buf); + oggstream->page_count--; + return 0; +} + +static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule) +{ + return oggstream->kfgshift && !(granule & ((1<<oggstream->kfgshift)-1)); +} + +static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule) +{ + if (oggstream->kfgshift) + return (granule>>oggstream->kfgshift) + + (granule & ((1<<oggstream->kfgshift)-1)); + else + return granule; +} + +static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page) +{ + AVStream *st2 = s->streams[next->stream_index]; + AVStream *st = s->streams[page->stream_index]; + int64_t next_granule, cur_granule; + + if (next->granule == -1 || page->granule == -1) + return 0; + + next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule), + st2->time_base, AV_TIME_BASE_Q); + cur_granule = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule), + st ->time_base, AV_TIME_BASE_Q); + return next_granule > cur_granule; +} + +static int ogg_reset_cur_page(OGGStreamContext *oggstream) +{ + oggstream->page.granule = -1; + oggstream->page.flags = 0; + oggstream->page.segments_count = 0; + oggstream->page.size = 0; + return 0; +} + +static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream) +{ + OGGContext *ogg = s->priv_data; + OGGPageList **p = &ogg->page_list; + OGGPageList *l = av_mallocz(sizeof(*l)); + + if (!l) + return AVERROR(ENOMEM); + l->page = oggstream->page; + + oggstream->page.start_granule = oggstream->page.granule; + oggstream->page_count++; + ogg_reset_cur_page(oggstream); + + while (*p) { + if (ogg_compare_granule(s, &(*p)->page, &l->page)) + break; + p = &(*p)->next; + } + l->next = *p; + *p = l; + + return 0; +} + +static int ogg_buffer_data(AVFormatContext *s, AVStream *st, + 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 + // For theora, keyframes also need to have a timestamp to correctly mark + // them as such, otherwise seeking will not work correctly at the very + // least with old libogg versions. + // Do not try to flush header packets though, that will create broken files. + 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 || + ogg_key_granule(oggstream, granule))) { + if (oggstream->page.granule != -1) + ogg_buffer_page(s, oggstream); + 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; + + segments = FFMIN(total_segments - i, 255 - page->segments_count); + + if (i && !page->segments_count) + page->flags |= 1; // continued packet + + memset(page->segments+page->segments_count, 255, segments - 1); + page->segments_count += segments - 1; + + len = FFMIN(size, segments*255); + page->segments[page->segments_count++] = len - (segments-1)*255; + memcpy(page->data+page->size, p, len); + p += len; + size -= len; + i += segments; + page->size += len; + + if (i == total_segments) + page->granule = granule; + + 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); + } + } + } + + if (flush && oggstream->page.granule != -1) + ogg_buffer_page(s, oggstream); + + return 0; +} + +static uint8_t *ogg_write_vorbiscomment(int offset, int bitexact, + int *header_len, AVDictionary **m, int framing_bit) +{ + const char *vendor = bitexact ? "ffmpeg" : 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; + p = av_mallocz(size); + if (!p) + return NULL; + p0 = p; + + p += offset; + ff_vorbiscomment_write(&p, m, vendor, count); + if (framing_bit) + bytestream_put_byte(&p, 1); + + *header_len = size; + return p0; +} + +static int ogg_build_flac_headers(AVCodecContext *avctx, + OGGStreamContext *oggstream, int bitexact, + AVDictionary **m) +{ + enum FLACExtradataFormat format; + uint8_t *streaminfo; + uint8_t *p; + + if (!avpriv_flac_is_extradata_valid(avctx, &format, &streaminfo)) + return -1; + + // first packet: STREAMINFO + oggstream->header_len[0] = 51; + oggstream->header[0] = av_mallocz(51); // per ogg flac specs + p = oggstream->header[0]; + if (!p) + return AVERROR(ENOMEM); + bytestream_put_byte(&p, 0x7F); + bytestream_put_buffer(&p, "FLAC", 4); + bytestream_put_byte(&p, 1); // major version + bytestream_put_byte(&p, 0); // minor version + bytestream_put_be16(&p, 1); // headers packets without this one + 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); + + // second packet: VorbisComment + p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0); + if (!p) + return AVERROR(ENOMEM); + oggstream->header[1] = p; + bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment + bytestream_put_be24(&p, oggstream->header_len[1] - 4); + + return 0; +} + +#define SPEEX_HEADER_SIZE 80 + +static int ogg_build_speex_headers(AVCodecContext *avctx, + OGGStreamContext *oggstream, int bitexact, + AVDictionary **m) +{ + uint8_t *p; + + if (avctx->extradata_size < SPEEX_HEADER_SIZE) + return -1; + + // first packet: Speex header + p = av_mallocz(SPEEX_HEADER_SIZE); + if (!p) + return AVERROR(ENOMEM); + oggstream->header[0] = p; + oggstream->header_len[0] = SPEEX_HEADER_SIZE; + bytestream_put_buffer(&p, avctx->extradata, SPEEX_HEADER_SIZE); + AV_WL32(&oggstream->header[0][68], 0); // set extra_headers to 0 + + // second packet: VorbisComment + p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0); + if (!p) + return AVERROR(ENOMEM); + oggstream->header[1] = p; + + 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 int ogg_write_header(AVFormatContext *s) +{ + OGGContext *ogg = s->priv_data; + OGGStreamContext *oggstream = NULL; + 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; + + if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { + 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); + } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) + avpriv_set_pts_info(st, 64, st->codec->time_base.num, st->codec->time_base.den); + 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; + } + + if (!st->codec->extradata || !st->codec->extradata_size) { + av_log(s, AV_LOG_ERROR, "No extradata present\n"); + return -1; + } + oggstream = av_mallocz(sizeof(*oggstream)); + oggstream->page.stream_index = i; + + if (!(st->codec->flags & CODEC_FLAG_BITEXACT)) + do { + serial_num = av_get_random_seed(); + for (j = 0; j < i; j++) { + OGGStreamContext *sc = s->streams[j]->priv_data; + if (serial_num == sc->serial_num) + break; + } + } while (j < i); + oggstream->serial_num = serial_num; + + st->priv_data = oggstream; + 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->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 == AV_CODEC_ID_SPEEX) { + int err = ogg_build_speex_headers(st->codec, oggstream, + st->codec->flags & CODEC_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, + st->codec->flags & CODEC_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 == 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 (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, + &oggstream->header_len[1], &s->metadata, + framing_bit); + oggstream->header[1] = p; + if (!p) + return AVERROR(ENOMEM); + + bytestream_put_byte(&p, header_type); + bytestream_put_buffer(&p, cstr, 6); + + 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); + oggstream->vrev = oggstream->header[0][9]; + av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n", + oggstream->kfgshift, oggstream->vrev); + } + } + } + + 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, 1); + oggstream->page.flags |= 2; // bos + ogg_buffer_page(s, oggstream); + } + for (j = 0; j < s->nb_streams; j++) { + AVStream *st = s->streams[j]; + OGGStreamContext *oggstream = st->priv_data; + for (i = 1; i < 3; i++) { + if (oggstream->header_len[i]) + ogg_buffer_data(s, st, oggstream->header[i], + oggstream->header_len[i], 0, 1); + } + ogg_buffer_page(s, oggstream); + } + + oggstream->page.start_granule = AV_NOPTS_VALUE; + + 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 && oggstream->page_count == 1 ? 4 : 0); // eos + next = p->next; + av_freep(&p); + p = next; + } + ogg->page_list = p; +} + +static int ogg_write_packet(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 == 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) + oggstream->last_kf_pts = pts; + pframe_count = pts - oggstream->last_kf_pts; + // prevent frame count from overflow if key frame flag is not set + if (pframe_count >= (1<<oggstream->kfgshift)) { + oggstream->last_kf_pts += pframe_count; + pframe_count = 0; + } + granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count; + } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) + granule = pkt->pts + pkt->duration + av_rescale_q(st->codec->delay, (AVRational){ 1, st->codec->sample_rate }, st->time_base); + else + granule = pkt->pts + pkt->duration; + + 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; + + ogg_write_pages(s, 0); + + oggstream->last_granule = granule; + + return 0; +} + +static int ogg_write_trailer(AVFormatContext *s) +{ + int i; + + /* 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 == AV_CODEC_ID_FLAC || + st->codec->codec_id == AV_CODEC_ID_SPEEX || + st->codec->codec_id == AV_CODEC_ID_OPUS) { + av_freep(&oggstream->header[0]); + } + av_freep(&oggstream->header[1]); + av_freep(&st->priv_data); + } + return 0; +} + +AVOutputFormat ff_ogg_muxer = { + .name = "ogg", + .long_name = NULL_IF_CONFIG_SMALL("Ogg"), + .mime_type = "application/ogg", + .extensions = "ogg,ogv,spx,opus", + .priv_data_size = sizeof(OGGContext), + .audio_codec = 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, + .priv_class = &ogg_muxer_class, +}; |