mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-21 08:45:06 +02:00
![Stefano Sabatini](/assets/img/avatar_default.png)
is deprecated and will be dropped at the next major bump. Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
129 lines
4.3 KiB
C
129 lines
4.3 KiB
C
/*
|
|
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 FFmpeg. 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);
|
|
|
|
st->time_base.num = 1;
|
|
st->time_base.den = 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
|
|
};
|