blob: 27fc99247de3be20eb4d4a9b429446a1349d4d6d
| 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 | |
| 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 | |
| 50 | if (!spxp) { |
| 51 | spxp = av_mallocz(sizeof(*spxp)); |
| 52 | if (!spxp) |
| 53 | return AVERROR(ENOMEM); |
| 54 | os->private = spxp; |
| 55 | } |
| 56 | |
| 57 | if (spxp->seq > 1) |
| 58 | return 0; |
| 59 | |
| 60 | if (spxp->seq == 0) { |
| 61 | int frames_per_packet; |
| 62 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| 63 | st->codecpar->codec_id = AV_CODEC_ID_SPEEX; |
| 64 | |
| 65 | if (os->psize < 68) { |
| 66 | av_log(s, AV_LOG_ERROR, "speex packet too small\n"); |
| 67 | return AVERROR_INVALIDDATA; |
| 68 | } |
| 69 | |
| 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; |
| 74 | } |
| 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; |
| 79 | } |
| 80 | st->codecpar->channel_layout = st->codecpar->channels == 1 ? AV_CH_LAYOUT_MONO : |
| 81 | AV_CH_LAYOUT_STEREO; |
| 82 | |
| 83 | spxp->packet_size = AV_RL32(p + 56); |
| 84 | frames_per_packet = AV_RL32(p + 64); |
| 85 | if (spxp->packet_size < 0 || |
| 86 | frames_per_packet < 0 || |
| 87 | spxp->packet_size * (int64_t)frames_per_packet > INT32_MAX / 256) { |
| 88 | av_log(s, AV_LOG_ERROR, "invalid packet_size, frames_per_packet %d %d\n", spxp->packet_size, frames_per_packet); |
| 89 | spxp->packet_size = 0; |
| 90 | return AVERROR_INVALIDDATA; |
| 91 | } |
| 92 | if (frames_per_packet) |
| 93 | spxp->packet_size *= frames_per_packet; |
| 94 | |
| 95 | if (ff_alloc_extradata(st->codecpar, os->psize) < 0) |
| 96 | return AVERROR(ENOMEM); |
| 97 | memcpy(st->codecpar->extradata, p, st->codecpar->extradata_size); |
| 98 | |
| 99 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
| 100 | } else |
| 101 | ff_vorbis_stream_comment(s, st, p, os->psize); |
| 102 | |
| 103 | spxp->seq++; |
| 104 | return 1; |
| 105 | } |
| 106 | |
| 107 | static int ogg_page_packets(struct ogg_stream *os) |
| 108 | { |
| 109 | int i; |
| 110 | int packets = 0; |
| 111 | for (i = 0; i < os->nsegs; i++) |
| 112 | if (os->segments[i] < 255) |
| 113 | packets++; |
| 114 | return packets; |
| 115 | } |
| 116 | |
| 117 | static int speex_packet(AVFormatContext *s, int idx) |
| 118 | { |
| 119 | struct ogg *ogg = s->priv_data; |
| 120 | struct ogg_stream *os = ogg->streams + idx; |
| 121 | struct speex_params *spxp = os->private; |
| 122 | int packet_size = spxp->packet_size; |
| 123 | |
| 124 | if (os->flags & OGG_FLAG_EOS && os->lastpts != AV_NOPTS_VALUE && |
| 125 | os->granule > 0) { |
| 126 | /* first packet of final page. we have to calculate the final packet |
| 127 | duration here because it is the only place we know the next-to-last |
| 128 | granule position. */ |
| 129 | spxp->final_packet_duration = os->granule - os->lastpts - |
| 130 | packet_size * (ogg_page_packets(os) - 1); |
| 131 | } |
| 132 | |
| 133 | if (!os->lastpts && os->granule > 0) |
| 134 | /* first packet */ |
| 135 | os->lastpts = os->lastdts = os->granule - packet_size * |
| 136 | ogg_page_packets(os); |
| 137 | if (os->flags & OGG_FLAG_EOS && os->segp == os->nsegs && |
| 138 | spxp->final_packet_duration) |
| 139 | /* final packet */ |
| 140 | os->pduration = spxp->final_packet_duration; |
| 141 | else |
| 142 | os->pduration = packet_size; |
| 143 | |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | const struct ogg_codec ff_speex_codec = { |
| 148 | .magic = "Speex ", |
| 149 | .magicsize = 8, |
| 150 | .header = speex_header, |
| 151 | .packet = speex_packet, |
| 152 | .nb_header = 2, |
| 153 | }; |
| 154 |