/** 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/intreadwrite.h" #include "libavcodec/get_bits.h" #include "libavcodec/bytestream.h" #include "avformat.h" #include "internal.h" #include "oggdec.h" #include "riff.h" static int ogm_header(AVFormatContext *s, int idx) { struct ogg *ogg = s->priv_data; struct ogg_stream *os = ogg->streams + idx; AVStream *st = s->streams[idx]; GetByteContext p; uint64_t time_unit; uint64_t spu; bytestream2_init(&p, os->buf + os->pstart, os->psize); if (!(bytestream2_peek_byte(&p) & 1)) return 0; if (bytestream2_peek_byte(&p) == 1) { bytestream2_skip(&p, 1); if (bytestream2_peek_byte(&p) == 'v'){ int tag; st->codec->codec_type = AVMEDIA_TYPE_VIDEO; bytestream2_skip(&p, 8); tag = bytestream2_get_le32(&p); st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag); st->codec->codec_tag = tag; } else if (bytestream2_peek_byte(&p) == 't') { st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; st->codec->codec_id = AV_CODEC_ID_TEXT; bytestream2_skip(&p, 12); } else { uint8_t acid[5] = { 0 }; int cid; st->codec->codec_type = AVMEDIA_TYPE_AUDIO; bytestream2_skip(&p, 8); bytestream2_get_buffer(&p, acid, 4); acid[4] = 0; cid = strtol(acid, NULL, 16); st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, cid); st->need_parsing = AVSTREAM_PARSE_FULL; } bytestream2_skip(&p, 4); /* useless size field */ time_unit = bytestream2_get_le64(&p); spu = bytestream2_get_le64(&p); if (!time_unit || !spu) { av_log(s, AV_LOG_ERROR, "Invalid timing values.\n"); return AVERROR_INVALIDDATA; } bytestream2_skip(&p, 4); /* default_len */ bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */ if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){ st->codec->width = bytestream2_get_le32(&p); st->codec->height = bytestream2_get_le32(&p); avpriv_set_pts_info(st, 64, time_unit, spu * 10000000); } else { st->codec->channels = bytestream2_get_le16(&p); bytestream2_skip(&p, 2); /* block_align */ st->codec->bit_rate = bytestream2_get_le32(&p) * 8; st->codec->sample_rate = spu * 10000000 / time_unit; avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); } } else if (bytestream2_peek_byte(&p) == 3) { bytestream2_skip(&p, 7); if (bytestream2_get_bytes_left(&p) > 1) ff_vorbis_stream_comment(s, st, p.buffer, bytestream2_get_bytes_left(&p) - 1); } return 1; } static int ogm_dshow_header(AVFormatContext *s, int idx) { struct ogg *ogg = s->priv_data; struct ogg_stream *os = ogg->streams + idx; AVStream *st = s->streams[idx]; uint8_t *p = os->buf + os->pstart; uint32_t t; if(!(*p & 1)) return 0; if(*p != 1) return 1; t = AV_RL32(p + 96); if(t == 0x05589f80){ st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68)); avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000); st->codec->width = AV_RL32(p + 176); st->codec->height = AV_RL32(p + 180); } else if(t == 0x05589f81){ st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124)); st->codec->channels = AV_RL16(p + 126); st->codec->sample_rate = AV_RL32(p + 128); st->codec->bit_rate = AV_RL32(p + 132) * 8; } return 1; } static int ogm_packet(AVFormatContext *s, int idx) { struct ogg *ogg = s->priv_data; struct ogg_stream *os = ogg->streams + idx; uint8_t *p = os->buf + os->pstart; int lb; if(*p & 8) os->pflags |= AV_PKT_FLAG_KEY; lb = ((*p & 2) << 1) | ((*p >> 6) & 3); os->pstart += lb + 1; os->psize -= lb + 1; while (lb--) os->pduration += p[lb+1] << (lb*8); return 0; } const struct ogg_codec ff_ogm_video_codec = { .magic = "\001video", .magicsize = 6, .header = ogm_header, .packet = ogm_packet, .granule_is_start = 1, .nb_header = 2, }; const struct ogg_codec ff_ogm_audio_codec = { .magic = "\001audio", .magicsize = 6, .header = ogm_header, .packet = ogm_packet, .granule_is_start = 1, .nb_header = 2, }; const struct ogg_codec ff_ogm_text_codec = { .magic = "\001text", .magicsize = 5, .header = ogm_header, .packet = ogm_packet, .granule_is_start = 1, .nb_header = 2, }; const struct ogg_codec ff_ogm_old_codec = { .magic = "\001Direct Show Samples embedded in Ogg", .magicsize = 35, .header = ogm_dshow_header, .packet = ogm_packet, .granule_is_start = 1, .nb_header = 1, };