1/** 2 Copyright (C) 2005 Michael Ahlberg, M��ns Rullg��rd 3 4 Permission is hereby granted, free of charge, to any person 5 obtaining a copy of this software and associated documentation 6 files (the "Software"), to deal in the Software without 7 restriction, including without limitation the rights to use, copy, 8 modify, merge, publish, distribute, sublicense, and/or sell copies 9 of the Software, and to permit persons to whom the Software is 10 furnished to do so, subject to the following conditions: 11 12 The above copyright notice and this permission notice shall be 13 included in all copies or substantial portions of the Software. 14 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 19 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 20 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 DEALINGS IN THE SOFTWARE. 23**/ 24 25#include <stdlib.h> 26#include "libavutil/intreadwrite.h" 27#include "libavcodec/get_bits.h" 28#include "libavcodec/bytestream.h" 29#include "avformat.h" 30#include "oggdec.h" 31#include "riff.h" 32 33static int 34ogm_header(AVFormatContext *s, int idx) 35{ 36 struct ogg *ogg = s->priv_data; 37 struct ogg_stream *os = ogg->streams + idx; 38 AVStream *st = s->streams[idx]; 39 const uint8_t *p = os->buf + os->pstart; 40 uint64_t time_unit; 41 uint64_t spu; 42 uint32_t default_len; 43 44 if(!(*p & 1)) 45 return 0; 46 47 if(*p == 1) { 48 p++; 49 50 if(*p == 'v'){ 51 int tag; 52 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 53 p += 8; 54 tag = bytestream_get_le32(&p); 55 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag); 56 st->codec->codec_tag = tag; 57 } else if (*p == 't') { 58 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; 59 st->codec->codec_id = CODEC_ID_TEXT; 60 p += 12; 61 } else { 62 uint8_t acid[5]; 63 int cid; 64 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 65 p += 8; 66 bytestream_get_buffer(&p, acid, 4); 67 acid[4] = 0; 68 cid = strtol(acid, NULL, 16); 69 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, cid); 70 st->need_parsing = AVSTREAM_PARSE_FULL; 71 } 72 73 p += 4; /* useless size field */ 74 75 time_unit = bytestream_get_le64(&p); 76 spu = bytestream_get_le64(&p); 77 default_len = bytestream_get_le32(&p); 78 79 p += 8; /* buffersize + bits_per_sample */ 80 81 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){ 82 st->codec->width = bytestream_get_le32(&p); 83 st->codec->height = bytestream_get_le32(&p); 84 st->codec->time_base.den = spu * 10000000; 85 st->codec->time_base.num = time_unit; 86 st->time_base = st->codec->time_base; 87 } else { 88 st->codec->channels = bytestream_get_le16(&p); 89 p += 2; /* block_align */ 90 st->codec->bit_rate = bytestream_get_le32(&p) * 8; 91 st->codec->sample_rate = spu * 10000000 / time_unit; 92 st->time_base.num = 1; 93 st->time_base.den = st->codec->sample_rate; 94 } 95 } else if (*p == 3) { 96 if (os->psize > 8) 97 ff_vorbis_comment(s, &st->metadata, p+7, os->psize-8); 98 } 99 100 return 1; 101} 102 103static int 104ogm_dshow_header(AVFormatContext *s, int idx) 105{ 106 struct ogg *ogg = s->priv_data; 107 struct ogg_stream *os = ogg->streams + idx; 108 AVStream *st = s->streams[idx]; 109 uint8_t *p = os->buf + os->pstart; 110 uint32_t t; 111 112 if(!(*p & 1)) 113 return 0; 114 if(*p != 1) 115 return 1; 116 117 t = AV_RL32(p + 96); 118 119 if(t == 0x05589f80){ 120 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 121 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68)); 122 st->codec->time_base.den = 10000000; 123 st->codec->time_base.num = AV_RL64(p + 164); 124 st->codec->width = AV_RL32(p + 176); 125 st->codec->height = AV_RL32(p + 180); 126 } else if(t == 0x05589f81){ 127 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 128 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124)); 129 st->codec->channels = AV_RL16(p + 126); 130 st->codec->sample_rate = AV_RL32(p + 128); 131 st->codec->bit_rate = AV_RL32(p + 132) * 8; 132 } 133 134 return 1; 135} 136 137static int 138ogm_packet(AVFormatContext *s, int idx) 139{ 140 struct ogg *ogg = s->priv_data; 141 struct ogg_stream *os = ogg->streams + idx; 142 uint8_t *p = os->buf + os->pstart; 143 int lb; 144 145 if(*p & 8) 146 os->pflags |= AV_PKT_FLAG_KEY; 147 148 lb = ((*p & 2) << 1) | ((*p >> 6) & 3); 149 os->pstart += lb + 1; 150 os->psize -= lb + 1; 151 152 while (lb--) 153 os->pduration += p[lb+1] << (lb*8); 154 155 return 0; 156} 157 158const struct ogg_codec ff_ogm_video_codec = { 159 .magic = "\001video", 160 .magicsize = 6, 161 .header = ogm_header, 162 .packet = ogm_packet, 163 .granule_is_start = 1, 164}; 165 166const struct ogg_codec ff_ogm_audio_codec = { 167 .magic = "\001audio", 168 .magicsize = 6, 169 .header = ogm_header, 170 .packet = ogm_packet, 171 .granule_is_start = 1, 172}; 173 174const struct ogg_codec ff_ogm_text_codec = { 175 .magic = "\001text", 176 .magicsize = 5, 177 .header = ogm_header, 178 .packet = ogm_packet, 179 .granule_is_start = 1, 180}; 181 182const struct ogg_codec ff_ogm_old_codec = { 183 .magic = "\001Direct Show Samples embedded in Ogg", 184 .magicsize = 35, 185 .header = ogm_dshow_header, 186 .packet = ogm_packet, 187 .granule_is_start = 1, 188}; 189