diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/oggenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/oggenc.c | 292 |
1 files changed, 0 insertions, 292 deletions
diff --git a/contrib/ffmpeg/libavformat/oggenc.c b/contrib/ffmpeg/libavformat/oggenc.c deleted file mode 100644 index af2c5de12..000000000 --- a/contrib/ffmpeg/libavformat/oggenc.c +++ /dev/null @@ -1,292 +0,0 @@ -/* - * 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 "avformat.h" -#include "crc.h" -#include "xiph.h" -#include "bytestream.h" - -typedef struct { - int64_t duration; - 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; -} OGGStreamContext; - -static void ogg_update_checksum(AVFormatContext *s, offset_t crc_offset) -{ - offset_t pos = url_ftell(s->pb); - uint32_t checksum = get_checksum(s->pb); - url_fseek(s->pb, crc_offset, SEEK_SET); - put_be32(s->pb, checksum); - url_fseek(s->pb, pos, SEEK_SET); -} - -static int ogg_write_page(AVFormatContext *s, const uint8_t *data, int size, - int64_t granule, int stream_index, int flags) -{ - OGGStreamContext *oggstream = s->streams[stream_index]->priv_data; - offset_t crc_offset; - int page_segments, i; - - if (size >= 255*255) { - granule = -1; - size = 255*255; - } else if (oggstream->eos) - flags |= 4; - - page_segments = FFMIN((size/255)+!!size, 255); - - init_checksum(s->pb, ff_crc04C11DB7_update, 0); - put_tag(s->pb, "OggS"); - put_byte(s->pb, 0); - put_byte(s->pb, flags); - put_le64(s->pb, granule); - put_le32(s->pb, stream_index); - put_le32(s->pb, oggstream->page_counter++); - crc_offset = url_ftell(s->pb); - put_le32(s->pb, 0); // crc - put_byte(s->pb, page_segments); - for (i = 0; i < page_segments-1; i++) - put_byte(s->pb, 255); - if (size) { - put_byte(s->pb, size - (page_segments-1)*255); - put_buffer(s->pb, data, size); - } - ogg_update_checksum(s, crc_offset); - put_flush_packet(s->pb); - return size; -} - -static int ogg_build_flac_headers(const uint8_t *extradata, int extradata_size, - OGGStreamContext *oggstream, int bitexact) -{ - const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT; - uint8_t *p; - if (extradata_size != 34) - return -1; - oggstream->header_len[0] = 79; - oggstream->header[0] = av_mallocz(79); // per ogg flac specs - p = oggstream->header[0]; - 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, extradata, 34); - oggstream->header_len[1] = 1+3+4+strlen(vendor)+4; - oggstream->header[1] = av_mallocz(oggstream->header_len[1]); - p = oggstream->header[1]; - bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment - bytestream_put_be24(&p, oggstream->header_len[1] - 4); - bytestream_put_le32(&p, strlen(vendor)); - bytestream_put_buffer(&p, vendor, strlen(vendor)); - bytestream_put_le32(&p, 0); // user comment list length - return 0; -} - -static int ogg_write_header(AVFormatContext *s) -{ - OGGStreamContext *oggstream; - int i, j; - for (i = 0; i < s->nb_streams; i++) { - AVStream *st = s->streams[i]; - if (st->codec->codec_type == CODEC_TYPE_AUDIO) - av_set_pts_info(st, 64, 1, st->codec->sample_rate); - else if (st->codec->codec_type == CODEC_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_FLAC) { - 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)); - st->priv_data = oggstream; - if (st->codec->codec_id == CODEC_ID_FLAC) { - if (ogg_build_flac_headers(st->codec->extradata, st->codec->extradata_size, - oggstream, st->codec->flags & CODEC_FLAG_BITEXACT) < 0) { - av_log(s, AV_LOG_ERROR, "Extradata corrupted\n"); - av_freep(&st->priv_data); - } - } else { - if (ff_split_xiph_headers(st->codec->extradata, st->codec->extradata_size, - st->codec->codec_id == 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; - } - if (st->codec->codec_id == 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 (i = 0; i < 3; i++) { - for (j = 0; j < s->nb_streams; j++) { - AVStream *st = s->streams[j]; - OGGStreamContext *oggstream = st->priv_data; - if (oggstream && oggstream->header_len[i]) { - ogg_write_page(s, oggstream->header[i], oggstream->header_len[i], - 0, st->index, i ? 0 : 2); // bos - } - } - } - return 0; -} - -static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt) -{ - AVStream *st = s->streams[pkt->stream_index]; - OGGStreamContext *oggstream = st->priv_data; - uint8_t *ptr = pkt->data; - int ret, size = pkt->size; - int64_t granule; - - if (st->codec->codec_id == CODEC_ID_THEORA) { - int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration; - int pframe_count; - if (pkt->flags & 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 - granule = pkt->pts + pkt->duration; - oggstream->duration = granule; - do { - ret = ogg_write_page(s, ptr, size, granule, pkt->stream_index, ptr != pkt->data); - ptr += ret; size -= ret; - } while (size > 0 || ret == 255*255); // need to output a last nil page - - return 0; -} - -int ogg_interleave_per_granule(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush) -{ - AVPacketList *pktl, **next_point, *this_pktl; - int stream_count = 0; - int streams[MAX_STREAMS] = {0}; - int interleaved = 0; - - if (pkt) { - AVStream *st = s->streams[pkt->stream_index]; - this_pktl = av_mallocz(sizeof(AVPacketList)); - this_pktl->pkt = *pkt; - if (pkt->destruct == av_destruct_packet) - pkt->destruct = NULL; // not shared -> must keep original from being freed - else - av_dup_packet(&this_pktl->pkt); // shared -> must dup - next_point = &s->packet_buffer; - while (*next_point) { - AVStream *st2 = s->streams[(*next_point)->pkt.stream_index]; - AVPacket *next_pkt = &(*next_point)->pkt; - int64_t cur_granule, next_granule; - next_granule = av_rescale_q(next_pkt->pts + next_pkt->duration, - st2->time_base, AV_TIME_BASE_Q); - cur_granule = av_rescale_q(pkt->pts + pkt->duration, - st->time_base, AV_TIME_BASE_Q); - if (next_granule > cur_granule) - break; - next_point= &(*next_point)->next; - } - this_pktl->next= *next_point; - *next_point= this_pktl; - } - - pktl = s->packet_buffer; - while (pktl) { - if (streams[pktl->pkt.stream_index] == 0) - stream_count++; - streams[pktl->pkt.stream_index]++; - // need to buffer at least one packet to set eos flag - if (streams[pktl->pkt.stream_index] == 2) - interleaved++; - pktl = pktl->next; - } - - if ((s->nb_streams == stream_count && interleaved == stream_count) || - (flush && stream_count)) { - pktl= s->packet_buffer; - *out= pktl->pkt; - s->packet_buffer = pktl->next; - if (flush && streams[out->stream_index] == 1) { - OGGStreamContext *ogg = s->streams[out->stream_index]->priv_data; - ogg->eos = 1; - } - av_freep(&pktl); - return 1; - } else { - av_init_packet(out); - return 0; - } -} - -static int ogg_write_trailer(AVFormatContext *s) -{ - int i; - 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) { - av_free(oggstream->header[0]); - av_free(oggstream->header[1]); - } - av_freep(&st->priv_data); - } - return 0; -} - -AVOutputFormat ogg_muxer = { - "ogg", - "Ogg format", - "application/ogg", - "ogg", - 0, - CODEC_ID_FLAC, - CODEC_ID_THEORA, - ogg_write_header, - ogg_write_packet, - ogg_write_trailer, - .interleave_packet = ogg_interleave_per_granule, -}; |