1 /*
2 Copyright (C) 2008 Reimar Döffinger
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/bswap.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/channel_layout.h"
30
31 #include "libavcodec/bytestream.h"
32
33 #include "avformat.h"
34 #include "internal.h"
35 #include "oggdec.h"
36
37 struct speex_params {
38 int packet_size;
39 int final_packet_duration;
40 int seq;
41 };
42
speex_header(AVFormatContext * s,int idx)43 static int speex_header(AVFormatContext *s, int idx) {
44 struct ogg *ogg = s->priv_data;
45 struct ogg_stream *os = ogg->streams + idx;
46 struct speex_params *spxp = os->private;
47 AVStream *st = s->streams[idx];
48 uint8_t *p = os->buf + os->pstart;
49 int ret;
50
51 if (!spxp) {
52 spxp = av_mallocz(sizeof(*spxp));
53 if (!spxp)
54 return AVERROR(ENOMEM);
55 os->private = spxp;
56 }
57
58 if (spxp->seq > 1)
59 return 0;
60
61 if (spxp->seq == 0) {
62 int frames_per_packet;
63 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
64 st->codecpar->codec_id = AV_CODEC_ID_SPEEX;
65
66 if (os->psize < 68) {
67 av_log(s, AV_LOG_ERROR, "speex packet too small\n");
68 return AVERROR_INVALIDDATA;
69 }
70
71 st->codecpar->sample_rate = AV_RL32(p + 36);
72 if (st->codecpar->sample_rate <= 0) {
73 av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
74 return AVERROR_INVALIDDATA;
75 }
76 st->codecpar->channels = AV_RL32(p + 48);
77 if (st->codecpar->channels < 1 || st->codecpar->channels > 2) {
78 av_log(s, AV_LOG_ERROR, "invalid channel count. Speex must be mono or stereo.\n");
79 return AVERROR_INVALIDDATA;
80 }
81 st->codecpar->channel_layout = st->codecpar->channels == 1 ? AV_CH_LAYOUT_MONO :
82 AV_CH_LAYOUT_STEREO;
83
84 spxp->packet_size = AV_RL32(p + 56);
85 frames_per_packet = AV_RL32(p + 64);
86 if (spxp->packet_size < 0 ||
87 frames_per_packet < 0 ||
88 spxp->packet_size * (int64_t)frames_per_packet > INT32_MAX / 256) {
89 av_log(s, AV_LOG_ERROR, "invalid packet_size, frames_per_packet %d %d\n", spxp->packet_size, frames_per_packet);
90 spxp->packet_size = 0;
91 return AVERROR_INVALIDDATA;
92 }
93 if (frames_per_packet)
94 spxp->packet_size *= frames_per_packet;
95
96 if ((ret = ff_alloc_extradata(st->codecpar, os->psize)) < 0)
97 return ret;
98 memcpy(st->codecpar->extradata, p, st->codecpar->extradata_size);
99
100 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
101 } else
102 ff_vorbis_stream_comment(s, st, p, os->psize);
103
104 spxp->seq++;
105 return 1;
106 }
107
ogg_page_packets(struct ogg_stream * os)108 static int ogg_page_packets(struct ogg_stream *os)
109 {
110 int i;
111 int packets = 0;
112 for (i = 0; i < os->nsegs; i++)
113 if (os->segments[i] < 255)
114 packets++;
115 return packets;
116 }
117
speex_packet(AVFormatContext * s,int idx)118 static int speex_packet(AVFormatContext *s, int idx)
119 {
120 struct ogg *ogg = s->priv_data;
121 struct ogg_stream *os = ogg->streams + idx;
122 struct speex_params *spxp = os->private;
123 int packet_size = spxp->packet_size;
124
125 if (os->flags & OGG_FLAG_EOS && os->lastpts != AV_NOPTS_VALUE &&
126 os->granule > 0) {
127 /* first packet of final page. we have to calculate the final packet
128 duration here because it is the only place we know the next-to-last
129 granule position. */
130 spxp->final_packet_duration = os->granule - os->lastpts -
131 packet_size * (ogg_page_packets(os) - 1);
132 }
133
134 if (!os->lastpts && os->granule > 0)
135 /* first packet */
136 os->lastpts = os->lastdts = os->granule - packet_size *
137 ogg_page_packets(os);
138 if (os->flags & OGG_FLAG_EOS && os->segp == os->nsegs &&
139 spxp->final_packet_duration)
140 /* final packet */
141 os->pduration = spxp->final_packet_duration;
142 else
143 os->pduration = packet_size;
144
145 return 0;
146 }
147
148 const struct ogg_codec ff_speex_codec = {
149 .magic = "Speex ",
150 .magicsize = 8,
151 .header = speex_header,
152 .packet = speex_packet,
153 .nb_header = 2,
154 };
155