2 Copyright (C) 2008 Reimar Döffinger
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:
12 The above copyright notice and this permission notice shall be
13 included in all copies or substantial portions of the Software.
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.
27 #include "libavutil/bswap.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/channel_layout.h"
31 #include "libavcodec/bytestream.h"
39 int final_packet_duration;
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;
51 spxp = av_mallocz(sizeof(*spxp));
53 return AVERROR(ENOMEM);
61 int frames_per_packet;
62 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
63 st->codecpar->codec_id = AV_CODEC_ID_SPEEX;
66 av_log(s, AV_LOG_ERROR, "speex packet too small\n");
67 return AVERROR_INVALIDDATA;
70 st->codecpar->sample_rate = AV_RL32(p + 36);
71 if (st->codecpar->sample_rate <= 0) {
72 av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
73 return AVERROR_INVALIDDATA;
75 st->codecpar->channels = AV_RL32(p + 48);
76 if (st->codecpar->channels < 1 || st->codecpar->channels > 2) {
77 av_log(s, AV_LOG_ERROR, "invalid channel count. Speex must be mono or stereo.\n");
78 return AVERROR_INVALIDDATA;
80 st->codecpar->channel_layout = st->codecpar->channels == 1 ? AV_CH_LAYOUT_MONO :
83 spxp->packet_size = AV_RL32(p + 56);
84 frames_per_packet = AV_RL32(p + 64);
85 if (frames_per_packet)
86 spxp->packet_size *= frames_per_packet;
88 if (ff_alloc_extradata(st->codecpar, os->psize) < 0)
89 return AVERROR(ENOMEM);
90 memcpy(st->codecpar->extradata, p, st->codecpar->extradata_size);
92 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
94 ff_vorbis_stream_comment(s, st, p, os->psize);
100 static int ogg_page_packets(struct ogg_stream *os)
104 for (i = 0; i < os->nsegs; i++)
105 if (os->segments[i] < 255)
110 static int speex_packet(AVFormatContext *s, int idx)
112 struct ogg *ogg = s->priv_data;
113 struct ogg_stream *os = ogg->streams + idx;
114 struct speex_params *spxp = os->private;
115 int packet_size = spxp->packet_size;
117 if (os->flags & OGG_FLAG_EOS && os->lastpts != AV_NOPTS_VALUE &&
119 /* first packet of final page. we have to calculate the final packet
120 duration here because it is the only place we know the next-to-last
122 spxp->final_packet_duration = os->granule - os->lastpts -
123 packet_size * (ogg_page_packets(os) - 1);
126 if (!os->lastpts && os->granule > 0)
128 os->lastpts = os->lastdts = os->granule - packet_size *
129 ogg_page_packets(os);
130 if (os->flags & OGG_FLAG_EOS && os->segp == os->nsegs &&
131 spxp->final_packet_duration)
133 os->pduration = spxp->final_packet_duration;
135 os->pduration = packet_size;
140 const struct ogg_codec ff_speex_codec = {
143 .header = speex_header,
144 .packet = speex_packet,