| /* |
| Copyright (C) 2008 Reimar Döffinger |
| |
| Permission is hereby granted, free of charge, to any person |
| obtaining a copy of this software and associated documentation |
| files (the "Software"), to deal in the Software without |
| restriction, including without limitation the rights to use, copy, |
| modify, merge, publish, distribute, sublicense, and/or sell copies |
| of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be |
| included in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| DEALINGS IN THE SOFTWARE. |
| **/ |
| |
| #include <stdlib.h> |
| |
| #include "libavutil/bswap.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/channel_layout.h" |
| |
| #include "libavcodec/bytestream.h" |
| |
| #include "avformat.h" |
| #include "internal.h" |
| #include "oggdec.h" |
| |
| struct speex_params { |
| int packet_size; |
| int final_packet_duration; |
| int seq; |
| }; |
| |
| static int speex_header(AVFormatContext *s, int idx) { |
| struct ogg *ogg = s->priv_data; |
| struct ogg_stream *os = ogg->streams + idx; |
| struct speex_params *spxp = os->private; |
| AVStream *st = s->streams[idx]; |
| uint8_t *p = os->buf + os->pstart; |
| int ret; |
| |
| if (!spxp) { |
| spxp = av_mallocz(sizeof(*spxp)); |
| if (!spxp) |
| return AVERROR(ENOMEM); |
| os->private = spxp; |
| } |
| |
| if (spxp->seq > 1) |
| return 0; |
| |
| if (spxp->seq == 0) { |
| int frames_per_packet; |
| st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| st->codecpar->codec_id = AV_CODEC_ID_SPEEX; |
| |
| if (os->psize < 68) { |
| av_log(s, AV_LOG_ERROR, "speex packet too small\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| st->codecpar->sample_rate = AV_RL32(p + 36); |
| if (st->codecpar->sample_rate <= 0) { |
| av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate); |
| return AVERROR_INVALIDDATA; |
| } |
| st->codecpar->channels = AV_RL32(p + 48); |
| if (st->codecpar->channels < 1 || st->codecpar->channels > 2) { |
| av_log(s, AV_LOG_ERROR, "invalid channel count. Speex must be mono or stereo.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| st->codecpar->channel_layout = st->codecpar->channels == 1 ? AV_CH_LAYOUT_MONO : |
| AV_CH_LAYOUT_STEREO; |
| |
| spxp->packet_size = AV_RL32(p + 56); |
| frames_per_packet = AV_RL32(p + 64); |
| if (spxp->packet_size < 0 || |
| frames_per_packet < 0 || |
| spxp->packet_size * (int64_t)frames_per_packet > INT32_MAX / 256) { |
| av_log(s, AV_LOG_ERROR, "invalid packet_size, frames_per_packet %d %d\n", spxp->packet_size, frames_per_packet); |
| spxp->packet_size = 0; |
| return AVERROR_INVALIDDATA; |
| } |
| if (frames_per_packet) |
| spxp->packet_size *= frames_per_packet; |
| |
| if ((ret = ff_alloc_extradata(st->codecpar, os->psize)) < 0) |
| return ret; |
| memcpy(st->codecpar->extradata, p, st->codecpar->extradata_size); |
| |
| avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
| } else |
| ff_vorbis_stream_comment(s, st, p, os->psize); |
| |
| spxp->seq++; |
| return 1; |
| } |
| |
| static int ogg_page_packets(struct ogg_stream *os) |
| { |
| int i; |
| int packets = 0; |
| for (i = 0; i < os->nsegs; i++) |
| if (os->segments[i] < 255) |
| packets++; |
| return packets; |
| } |
| |
| static int speex_packet(AVFormatContext *s, int idx) |
| { |
| struct ogg *ogg = s->priv_data; |
| struct ogg_stream *os = ogg->streams + idx; |
| struct speex_params *spxp = os->private; |
| int packet_size = spxp->packet_size; |
| |
| if (os->flags & OGG_FLAG_EOS && os->lastpts != AV_NOPTS_VALUE && |
| os->granule > 0) { |
| /* first packet of final page. we have to calculate the final packet |
| duration here because it is the only place we know the next-to-last |
| granule position. */ |
| spxp->final_packet_duration = os->granule - os->lastpts - |
| packet_size * (ogg_page_packets(os) - 1); |
| } |
| |
| if (!os->lastpts && os->granule > 0) |
| /* first packet */ |
| os->lastpts = os->lastdts = os->granule - packet_size * |
| ogg_page_packets(os); |
| if (os->flags & OGG_FLAG_EOS && os->segp == os->nsegs && |
| spxp->final_packet_duration) |
| /* final packet */ |
| os->pduration = spxp->final_packet_duration; |
| else |
| os->pduration = packet_size; |
| |
| return 0; |
| } |
| |
| const struct ogg_codec ff_speex_codec = { |
| .magic = "Speex ", |
| .magicsize = 8, |
| .header = speex_header, |
| .packet = speex_packet, |
| .nb_header = 2, |
| }; |