| /* |
| * 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 <stdint.h> |
| |
| #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" |
| #include "libavcodec/flac.h" |
| #include "avformat.h" |
| #include "avio_internal.h" |
| #include "internal.h" |
| #include "vorbiscomment.h" |
| |
| #define MAX_PAGE_SIZE 65025 |
| |
| typedef struct OGGPage { |
| 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 OGGStreamContext { |
| unsigned page_counter; |
| uint8_t *header[3]; |
| int header_len[3]; |
| /** for theora granule */ |
| int kfgshift; |
| int64_t last_kf_pts; |
| int vrev; |
| /* for VP8 granule */ |
| int isvp8; |
| 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 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 }, |
| { "oggpagesize", "Set preferred Ogg page size.", |
| OFFSET(pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, 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, name)\ |
| static const AVClass flavor ## _muxer_class = {\ |
| .class_name = #name " 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))) || |
| (oggstream->isvp8 && !((granule >> 3) & 0x07ffffff)); |
| } |
| |
| 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 if (oggstream->isvp8) |
| return granule >> 32; |
| 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 = ogg_granule_to_timestamp(oggstream, 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 and VP8, 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->codecpar->codec_id == AV_CODEC_ID_THEORA || st->codecpar->codec_id == AV_CODEC_ID_VP8) && !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; |
| |
| { |
| 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(ogg_granule_to_timestamp(oggstream, page->granule), |
| st->time_base, AV_TIME_BASE_Q); |
| |
| if (page->segments_count == 255) { |
| ogg_buffer_page(s, oggstream); |
| } else if (!header) { |
| if ((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(int64_t offset, int bitexact, |
| int *header_len, AVDictionary **m, int framing_bit) |
| { |
| const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT; |
| int64_t size; |
| uint8_t *p, *p0; |
| |
| ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL); |
| |
| size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit; |
| if (size > INT_MAX) |
| return NULL; |
| p = av_mallocz(size); |
| if (!p) |
| return NULL; |
| p0 = p; |
| |
| p += offset; |
| ff_vorbiscomment_write(&p, m, vendor); |
| if (framing_bit) |
| bytestream_put_byte(&p, 1); |
| |
| *header_len = size; |
| return p0; |
| } |
| |
| static int ogg_build_flac_headers(AVCodecParameters *par, |
| OGGStreamContext *oggstream, int bitexact, |
| AVDictionary **m) |
| { |
| uint8_t *p; |
| |
| if (par->extradata_size < FLAC_STREAMINFO_SIZE) |
| return AVERROR(EINVAL); |
| |
| // 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, par->extradata, 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(AVCodecParameters *par, |
| OGGStreamContext *oggstream, int bitexact, |
| AVDictionary **m) |
| { |
| uint8_t *p; |
| |
| if (par->extradata_size < SPEEX_HEADER_SIZE) |
| return AVERROR_INVALIDDATA; |
| |
| // 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, par->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(AVCodecParameters *par, |
| OGGStreamContext *oggstream, int bitexact, |
| AVDictionary **m) |
| { |
| uint8_t *p; |
| |
| if (par->extradata_size < OPUS_HEADER_SIZE) |
| return AVERROR_INVALIDDATA; |
| |
| /* first packet: Opus header */ |
| p = av_mallocz(par->extradata_size); |
| if (!p) |
| return AVERROR(ENOMEM); |
| oggstream->header[0] = p; |
| oggstream->header_len[0] = par->extradata_size; |
| bytestream_put_buffer(&p, par->extradata, par->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; |
| } |
| |
| #define VP8_HEADER_SIZE 26 |
| |
| static int ogg_build_vp8_headers(AVFormatContext *s, AVStream *st, |
| OGGStreamContext *oggstream, int bitexact) |
| { |
| AVCodecParameters *par = st->codecpar; |
| uint8_t *p; |
| |
| /* first packet: VP8 header */ |
| p = av_mallocz(VP8_HEADER_SIZE); |
| if (!p) |
| return AVERROR(ENOMEM); |
| oggstream->header[0] = p; |
| oggstream->header_len[0] = VP8_HEADER_SIZE; |
| bytestream_put_byte(&p, 0x4f); // HDRID |
| bytestream_put_buffer(&p, "VP80", 4); // Identifier |
| bytestream_put_byte(&p, 1); // HDRTYP |
| bytestream_put_byte(&p, 1); // VMAJ |
| bytestream_put_byte(&p, 0); // VMIN |
| bytestream_put_be16(&p, par->width); |
| bytestream_put_be16(&p, par->height); |
| bytestream_put_be24(&p, par->sample_aspect_ratio.num); |
| bytestream_put_be24(&p, par->sample_aspect_ratio.den); |
| if (st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0) { |
| // OggVP8 requires pts to increase by 1 per visible frame, so use the least common |
| // multiple framerate if available. |
| av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n", |
| st->time_base.num, st->time_base.den, |
| st->r_frame_rate.den, st->r_frame_rate.num); |
| avpriv_set_pts_info(st, 64, st->r_frame_rate.den, st->r_frame_rate.num); |
| } |
| bytestream_put_be32(&p, st->time_base.den); |
| bytestream_put_be32(&p, st->time_base.num); |
| |
| /* optional second packet: VorbisComment */ |
| if (av_dict_get(st->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) { |
| p = ogg_write_vorbiscomment(7, bitexact, &oggstream->header_len[1], &st->metadata, 0); |
| if (!p) |
| return AVERROR(ENOMEM); |
| oggstream->header[1] = p; |
| bytestream_put_byte(&p, 0x4f); // HDRID |
| bytestream_put_buffer(&p, "VP80", 4); // Identifier |
| bytestream_put_byte(&p, 2); // HDRTYP |
| bytestream_put_byte(&p, 0x20); |
| } |
| |
| oggstream->isvp8 = 1; |
| |
| 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_init(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 + ogg->serial_offset; |
| |
| if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) { |
| if (st->codecpar->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->codecpar->sample_rate); |
| } |
| |
| if (st->codecpar->codec_id != AV_CODEC_ID_VORBIS && |
| st->codecpar->codec_id != AV_CODEC_ID_THEORA && |
| st->codecpar->codec_id != AV_CODEC_ID_SPEEX && |
| st->codecpar->codec_id != AV_CODEC_ID_FLAC && |
| st->codecpar->codec_id != AV_CODEC_ID_OPUS && |
| st->codecpar->codec_id != AV_CODEC_ID_VP8) { |
| av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i); |
| return AVERROR(EINVAL); |
| } |
| |
| if ((!st->codecpar->extradata || !st->codecpar->extradata_size) && |
| st->codecpar->codec_id != AV_CODEC_ID_VP8) { |
| av_log(s, AV_LOG_ERROR, "No extradata present\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| oggstream = av_mallocz(sizeof(*oggstream)); |
| if (!oggstream) |
| return AVERROR(ENOMEM); |
| |
| oggstream->page.stream_index = i; |
| |
| if (!(s->flags & AVFMT_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; |
| |
| av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE); |
| |
| st->priv_data = oggstream; |
| if (st->codecpar->codec_id == AV_CODEC_ID_FLAC) { |
| int err = ogg_build_flac_headers(st->codecpar, oggstream, |
| s->flags & AVFMT_FLAG_BITEXACT, |
| &st->metadata); |
| if (err) { |
| av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n"); |
| av_freep(&st->priv_data); |
| return err; |
| } |
| } else if (st->codecpar->codec_id == AV_CODEC_ID_SPEEX) { |
| int err = ogg_build_speex_headers(st->codecpar, oggstream, |
| s->flags & AVFMT_FLAG_BITEXACT, |
| &st->metadata); |
| if (err) { |
| av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n"); |
| av_freep(&st->priv_data); |
| return err; |
| } |
| } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) { |
| int err = ogg_build_opus_headers(st->codecpar, oggstream, |
| s->flags & AVFMT_FLAG_BITEXACT, |
| &st->metadata); |
| if (err) { |
| av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n"); |
| av_freep(&st->priv_data); |
| return err; |
| } |
| } else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) { |
| int err = ogg_build_vp8_headers(s, st, oggstream, |
| s->flags & AVFMT_FLAG_BITEXACT); |
| if (err) { |
| av_log(s, AV_LOG_ERROR, "Error writing VP8 headers\n"); |
| av_freep(&st->priv_data); |
| return err; |
| } |
| } else { |
| uint8_t *p; |
| const char *cstr = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora"; |
| int header_type = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81; |
| int framing_bit = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0; |
| |
| if (avpriv_split_xiph_headers(st->codecpar->extradata, st->codecpar->extradata_size, |
| st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42, |
| (const uint8_t**)oggstream->header, oggstream->header_len) < 0) { |
| av_log(s, AV_LOG_ERROR, "Extradata corrupted\n"); |
| av_freep(&st->priv_data); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT, |
| &oggstream->header_len[1], &st->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->codecpar->codec_id == AV_CODEC_ID_THEORA) { |
| int den = AV_RB32(oggstream->header[0] + 22), num = AV_RB32(oggstream->header[0] + 26); |
| /* Make sure to use time base stored in the Theora stream header to write |
| correct timestamps */ |
| if (st->time_base.num != num || st->time_base.den != den) { |
| av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n", |
| st->time_base.num, st->time_base.den, num, den); |
| avpriv_set_pts_info(st, 64, num, den); |
| } |
| /** 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); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int ogg_write_header(AVFormatContext *s) |
| { |
| OGGStreamContext *oggstream = NULL; |
| int i, j; |
| |
| for (j = 0; j < s->nb_streams; j++) { |
| 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]; |
| 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; |
| |
| ogg_write_pages(s, 2); |
| |
| return 0; |
| } |
| |
| 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->codecpar->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->codecpar->codec_id == AV_CODEC_ID_OPUS) |
| granule = pkt->pts + pkt->duration + |
| av_rescale_q(st->codecpar->initial_padding, |
| (AVRational){ 1, st->codecpar->sample_rate }, |
| st->time_base); |
| else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) { |
| int64_t pts, invcnt, dist; |
| int visible; |
| |
| visible = (pkt->data[0] >> 4) & 1; |
| pts = pkt->pts + pkt->duration; |
| invcnt = (oggstream->last_granule >> 30) & 3; |
| invcnt = visible ? 3 : (invcnt == 3 ? 0 : invcnt + 1); |
| dist = (pkt->flags & AV_PKT_FLAG_KEY) ? 0 : ((oggstream->last_granule >> 3) & 0x07ffffff) + 1; |
| |
| granule = (pts << 32) | (invcnt << 30) | (dist << 3); |
| } 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_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 1; |
| } |
| |
| 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); |
| |
| return 0; |
| } |
| |
| static void ogg_free(AVFormatContext *s) |
| { |
| int i; |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| OGGStreamContext *oggstream = st->priv_data; |
| if (!oggstream) |
| continue; |
| if (st->codecpar->codec_id == AV_CODEC_ID_FLAC || |
| st->codecpar->codec_id == AV_CODEC_ID_SPEEX || |
| st->codecpar->codec_id == AV_CODEC_ID_OPUS || |
| st->codecpar->codec_id == AV_CODEC_ID_VP8) { |
| av_freep(&oggstream->header[0]); |
| } |
| av_freep(&oggstream->header[1]); |
| av_freep(&st->priv_data); |
| } |
| } |
| |
| #if CONFIG_OGG_MUXER |
| OGG_CLASS(ogg, Ogg) |
| AVOutputFormat ff_ogg_muxer = { |
| .name = "ogg", |
| .long_name = NULL_IF_CONFIG_SMALL("Ogg"), |
| .mime_type = "application/ogg", |
| .extensions = "ogg" |
| #if !CONFIG_OGV_MUXER |
| ",ogv" |
| #endif |
| #if !CONFIG_SPX_MUXER |
| ",spx" |
| #endif |
| #if !CONFIG_OPUS_MUXER |
| ",opus" |
| #endif |
| , |
| .priv_data_size = sizeof(OGGContext), |
| .audio_codec = CONFIG_LIBVORBIS_ENCODER ? |
| AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC, |
| .video_codec = AV_CODEC_ID_THEORA, |
| .init = ogg_init, |
| .write_header = ogg_write_header, |
| .write_packet = ogg_write_packet, |
| .write_trailer = ogg_write_trailer, |
| .deinit = ogg_free, |
| .flags = AVFMT_TS_NEGATIVE | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH, |
| .priv_class = &ogg_muxer_class, |
| }; |
| #endif |
| |
| #if CONFIG_OGA_MUXER |
| OGG_CLASS(oga, Ogg audio) |
| 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 = AV_CODEC_ID_FLAC, |
| .init = ogg_init, |
| .write_header = ogg_write_header, |
| .write_packet = ogg_write_packet, |
| .write_trailer = ogg_write_trailer, |
| .deinit = ogg_free, |
| .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, |
| .priv_class = &oga_muxer_class, |
| }; |
| #endif |
| |
| #if CONFIG_OGV_MUXER |
| OGG_CLASS(ogv, Ogg video) |
| AVOutputFormat ff_ogv_muxer = { |
| .name = "ogv", |
| .long_name = NULL_IF_CONFIG_SMALL("Ogg Video"), |
| .mime_type = "video/ogg", |
| .extensions = "ogv", |
| .priv_data_size = sizeof(OGGContext), |
| .audio_codec = CONFIG_LIBVORBIS_ENCODER ? |
| AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC, |
| .video_codec = CONFIG_LIBTHEORA_ENCODER ? |
| AV_CODEC_ID_THEORA : AV_CODEC_ID_VP8, |
| .init = ogg_init, |
| .write_header = ogg_write_header, |
| .write_packet = ogg_write_packet, |
| .write_trailer = ogg_write_trailer, |
| .deinit = ogg_free, |
| .flags = AVFMT_TS_NEGATIVE | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH, |
| .priv_class = &ogv_muxer_class, |
| }; |
| #endif |
| |
| #if CONFIG_SPX_MUXER |
| OGG_CLASS(spx, Ogg Speex) |
| 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, |
| .init = ogg_init, |
| .write_header = ogg_write_header, |
| .write_packet = ogg_write_packet, |
| .write_trailer = ogg_write_trailer, |
| .deinit = ogg_free, |
| .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, |
| .priv_class = &spx_muxer_class, |
| }; |
| #endif |
| |
| #if CONFIG_OPUS_MUXER |
| OGG_CLASS(opus, Ogg 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, |
| .init = ogg_init, |
| .write_header = ogg_write_header, |
| .write_packet = ogg_write_packet, |
| .write_trailer = ogg_write_trailer, |
| .deinit = ogg_free, |
| .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, |
| .priv_class = &opus_muxer_class, |
| }; |
| #endif |
