1 /**
2 Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
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
27 #include "libavutil/intreadwrite.h"
28
29 #include "libavcodec/bytestream.h"
30
31 #include "avformat.h"
32 #include "internal.h"
33 #include "oggdec.h"
34 #include "riff.h"
35
36 static int
ogm_header(AVFormatContext * s,int idx)37 ogm_header(AVFormatContext *s, int idx)
38 {
39 struct ogg *ogg = s->priv_data;
40 struct ogg_stream *os = ogg->streams + idx;
41 AVStream *st = s->streams[idx];
42 GetByteContext p;
43 uint64_t time_unit;
44 uint64_t spu;
45 uint32_t size;
46 int ret;
47
48 bytestream2_init(&p, os->buf + os->pstart, os->psize);
49 if (!(bytestream2_peek_byte(&p) & 1))
50 return 0;
51
52 if (bytestream2_peek_byte(&p) == 1) {
53 bytestream2_skip(&p, 1);
54
55 if (bytestream2_peek_byte(&p) == 'v'){
56 int tag;
57 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
58 bytestream2_skip(&p, 8);
59 tag = bytestream2_get_le32(&p);
60 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
61 st->codecpar->codec_tag = tag;
62 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
63 st->need_parsing = AVSTREAM_PARSE_HEADERS;
64 } else if (bytestream2_peek_byte(&p) == 't') {
65 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
66 st->codecpar->codec_id = AV_CODEC_ID_TEXT;
67 bytestream2_skip(&p, 12);
68 } else {
69 uint8_t acid[5] = { 0 };
70 int cid;
71 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
72 bytestream2_skip(&p, 8);
73 bytestream2_get_buffer(&p, acid, 4);
74 acid[4] = 0;
75 cid = strtol(acid, NULL, 16);
76 st->codecpar->codec_id = ff_codec_get_id(ff_codec_wav_tags, cid);
77 // our parser completely breaks AAC in Ogg
78 if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
79 st->need_parsing = AVSTREAM_PARSE_FULL;
80 }
81
82 size = bytestream2_get_le32(&p);
83 size = FFMIN(size, os->psize);
84 time_unit = bytestream2_get_le64(&p);
85 spu = bytestream2_get_le64(&p);
86 if (!time_unit || !spu) {
87 av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
88 return AVERROR_INVALIDDATA;
89 }
90
91 bytestream2_skip(&p, 4); /* default_len */
92 bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
93
94 if(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){
95 st->codecpar->width = bytestream2_get_le32(&p);
96 st->codecpar->height = bytestream2_get_le32(&p);
97 avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
98 } else {
99 st->codecpar->channels = bytestream2_get_le16(&p);
100 bytestream2_skip(&p, 2); /* block_align */
101 st->codecpar->bit_rate = bytestream2_get_le32(&p) * 8;
102 st->codecpar->sample_rate = spu * 10000000 / time_unit;
103 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
104 if (size >= 56 && st->codecpar->codec_id == AV_CODEC_ID_AAC) {
105 bytestream2_skip(&p, 4);
106 size -= 4;
107 }
108 if (size > 52) {
109 size -= 52;
110 if (bytestream2_get_bytes_left(&p) < size)
111 return AVERROR_INVALIDDATA;
112 if ((ret = ff_alloc_extradata(st->codecpar, size)) < 0)
113 return ret;
114 bytestream2_get_buffer(&p, st->codecpar->extradata, st->codecpar->extradata_size);
115 }
116 }
117
118 // Update internal avctx with changes to codecpar above.
119 st->internal->need_context_update = 1;
120 } else if (bytestream2_peek_byte(&p) == 3) {
121 bytestream2_skip(&p, 7);
122 if (bytestream2_get_bytes_left(&p) > 1)
123 ff_vorbis_stream_comment(s, st, p.buffer, bytestream2_get_bytes_left(&p) - 1);
124 }
125
126 return 1;
127 }
128
129 static int
ogm_dshow_header(AVFormatContext * s,int idx)130 ogm_dshow_header(AVFormatContext *s, int idx)
131 {
132 struct ogg *ogg = s->priv_data;
133 struct ogg_stream *os = ogg->streams + idx;
134 AVStream *st = s->streams[idx];
135 uint8_t *p = os->buf + os->pstart;
136 uint32_t t;
137
138 if(!(*p & 1))
139 return 0;
140 if(*p != 1)
141 return 1;
142
143 if (os->psize < 100)
144 return AVERROR_INVALIDDATA;
145 t = AV_RL32(p + 96);
146
147 if(t == 0x05589f80){
148 if (os->psize < 184)
149 return AVERROR_INVALIDDATA;
150
151 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
152 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68));
153 avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
154 st->codecpar->width = AV_RL32(p + 176);
155 st->codecpar->height = AV_RL32(p + 180);
156 } else if(t == 0x05589f81){
157 if (os->psize < 136)
158 return AVERROR_INVALIDDATA;
159
160 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
161 st->codecpar->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124));
162 st->codecpar->channels = AV_RL16(p + 126);
163 st->codecpar->sample_rate = AV_RL32(p + 128);
164 st->codecpar->bit_rate = AV_RL32(p + 132) * 8;
165 }
166
167 return 1;
168 }
169
170 static int
ogm_packet(AVFormatContext * s,int idx)171 ogm_packet(AVFormatContext *s, int idx)
172 {
173 struct ogg *ogg = s->priv_data;
174 struct ogg_stream *os = ogg->streams + idx;
175 uint8_t *p = os->buf + os->pstart;
176 int lb;
177
178 if(*p & 8)
179 os->pflags |= AV_PKT_FLAG_KEY;
180
181 lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
182 if (os->psize < lb + 1)
183 return AVERROR_INVALIDDATA;
184
185 os->pstart += lb + 1;
186 os->psize -= lb + 1;
187
188 while (lb--)
189 os->pduration += (uint64_t)p[lb+1] << (lb*8);
190
191 return 0;
192 }
193
194 const struct ogg_codec ff_ogm_video_codec = {
195 .magic = "\001video",
196 .magicsize = 6,
197 .header = ogm_header,
198 .packet = ogm_packet,
199 .granule_is_start = 1,
200 .nb_header = 2,
201 };
202
203 const struct ogg_codec ff_ogm_audio_codec = {
204 .magic = "\001audio",
205 .magicsize = 6,
206 .header = ogm_header,
207 .packet = ogm_packet,
208 .granule_is_start = 1,
209 .nb_header = 2,
210 };
211
212 const struct ogg_codec ff_ogm_text_codec = {
213 .magic = "\001text",
214 .magicsize = 5,
215 .header = ogm_header,
216 .packet = ogm_packet,
217 .granule_is_start = 1,
218 .nb_header = 2,
219 };
220
221 const struct ogg_codec ff_ogm_old_codec = {
222 .magic = "\001Direct Show Samples embedded in Ogg",
223 .magicsize = 35,
224 .header = ogm_dshow_header,
225 .packet = ogm_packet,
226 .granule_is_start = 1,
227 .nb_header = 1,
228 };
229