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- /*
- 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 "libavcodec/get_bits.h"
- #include "libavcodec/bytestream.h"
- #include "avformat.h"
- #include "oggdec.h"
- struct speex_params {
- 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;
- if (!spxp) {
- spxp = av_mallocz(sizeof(*spxp));
- os->private = spxp;
- }
- if (spxp->seq > 1)
- return 0;
- if (spxp->seq == 0) {
- int frames_per_packet;
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_id = CODEC_ID_SPEEX;
- st->codec->sample_rate = AV_RL32(p + 36);
- st->codec->channels = AV_RL32(p + 48);
- /* We treat the whole Speex packet as a single frame everywhere Speex
- is handled in Libav. This avoids the complexities of splitting
- and joining individual Speex frames, which are not always
- byte-aligned. */
- st->codec->frame_size = AV_RL32(p + 56);
- frames_per_packet = AV_RL32(p + 64);
- if (frames_per_packet)
- st->codec->frame_size *= frames_per_packet;
- st->codec->extradata_size = os->psize;
- st->codec->extradata = av_malloc(st->codec->extradata_size
- + FF_INPUT_BUFFER_PADDING_SIZE);
- memcpy(st->codec->extradata, p, st->codec->extradata_size);
- av_set_pts_info(st, 64, 1, st->codec->sample_rate);
- } else
- ff_vorbis_comment(s, &st->metadata, 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 = s->streams[idx]->codec->frame_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->pduration = os->granule - packet_size * (ogg_page_packets(os) - 1);
- else 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
- };
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