FFmpeg
oggparsespeex.c
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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 
26 #include "libavutil/intreadwrite.h"
27 
28 #include "avformat.h"
29 #include "internal.h"
30 #include "oggdec.h"
31 
32 struct speex_params {
35  int seq;
36 };
37 
38 static int speex_header(AVFormatContext *s, int idx) {
39  struct ogg *ogg = s->priv_data;
40  struct ogg_stream *os = ogg->streams + idx;
41  struct speex_params *spxp = os->private;
42  AVStream *st = s->streams[idx];
43  uint8_t *p = os->buf + os->pstart;
44  int ret;
45 
46  if (!spxp) {
47  spxp = av_mallocz(sizeof(*spxp));
48  if (!spxp)
49  return AVERROR(ENOMEM);
50  os->private = spxp;
51  }
52 
53  if (spxp->seq > 1)
54  return 0;
55 
56  if (spxp->seq == 0) {
57  int frames_per_packet;
58  int channels;
61 
62  if (os->psize < 68) {
63  av_log(s, AV_LOG_ERROR, "speex packet too small\n");
64  return AVERROR_INVALIDDATA;
65  }
66 
67  st->codecpar->sample_rate = AV_RL32(p + 36);
68  if (st->codecpar->sample_rate <= 0) {
69  av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
70  return AVERROR_INVALIDDATA;
71  }
72  channels = AV_RL32(p + 48);
74  av_log(s, AV_LOG_ERROR, "invalid channel count. Speex must be mono or stereo.\n");
75  return AVERROR_INVALIDDATA;
76  }
78 
79  spxp->packet_size = AV_RL32(p + 56);
80  frames_per_packet = AV_RL32(p + 64);
81  if (spxp->packet_size < 0 ||
82  frames_per_packet < 0 ||
83  spxp->packet_size * (int64_t)frames_per_packet > INT32_MAX / 256) {
84  av_log(s, AV_LOG_ERROR, "invalid packet_size, frames_per_packet %d %d\n", spxp->packet_size, frames_per_packet);
85  spxp->packet_size = 0;
86  return AVERROR_INVALIDDATA;
87  }
88  if (frames_per_packet)
89  spxp->packet_size *= frames_per_packet;
90 
91  if ((ret = ff_alloc_extradata(st->codecpar, os->psize)) < 0)
92  return ret;
93  memcpy(st->codecpar->extradata, p, st->codecpar->extradata_size);
94 
95  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
96  } else
97  ff_vorbis_stream_comment(s, st, p, os->psize);
98 
99  spxp->seq++;
100  return 1;
101 }
102 
103 static int ogg_page_packets(struct ogg_stream *os)
104 {
105  int i;
106  int packets = 0;
107  for (i = 0; i < os->nsegs; i++)
108  if (os->segments[i] < 255)
109  packets++;
110  return packets;
111 }
112 
113 static int speex_packet(AVFormatContext *s, int idx)
114 {
115  struct ogg *ogg = s->priv_data;
116  struct ogg_stream *os = ogg->streams + idx;
117  struct speex_params *spxp = os->private;
118  int packet_size = spxp->packet_size;
119 
120  if (os->flags & OGG_FLAG_EOS && os->lastpts != AV_NOPTS_VALUE &&
121  os->granule > 0) {
122  /* first packet of final page. we have to calculate the final packet
123  duration here because it is the only place we know the next-to-last
124  granule position. */
125  spxp->final_packet_duration = os->granule - os->lastpts -
126  packet_size * (ogg_page_packets(os) - 1);
127  }
128 
129  if (!os->lastpts && os->granule > 0)
130  /* first packet */
131  os->lastpts = os->lastdts = os->granule - packet_size *
132  ogg_page_packets(os);
133  if (os->flags & OGG_FLAG_EOS && os->segp == os->nsegs &&
134  spxp->final_packet_duration)
135  /* final packet */
136  os->pduration = spxp->final_packet_duration;
137  else
138  os->pduration = packet_size;
139 
140  return 0;
141 }
142 
143 const struct ogg_codec ff_speex_codec = {
144  .magic = "Speex ",
145  .magicsize = 8,
146  .header = speex_header,
147  .packet = speex_packet,
148  .nb_header = 2,
149 };
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:75
ogg_stream::segp
int segp
Definition: oggdec.h:78
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
ogg_stream::lastpts
int64_t lastpts
Definition: oggdec.h:71
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:57
ogg_stream::granule
uint64_t granule
Definition: oggdec.h:69
ogg_stream::buf
uint8_t * buf
Definition: oggdec.h:61
ogg_stream::nsegs
int nsegs
Definition: oggdec.h:78
ogg_page_packets
static int ogg_page_packets(struct ogg_stream *os)
Definition: oggparsespeex.c:103
ogg
Definition: oggdec.h:101
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:697
speex_params
Definition: oggparsespeex.c:32
AV_CODEC_ID_SPEEX
@ AV_CODEC_ID_SPEEX
Definition: codec_id.h:462
ogg_stream::lastdts
int64_t lastdts
Definition: oggdec.h:72
ogg_stream::pstart
unsigned int pstart
Definition: oggdec.h:64
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
channels
channels
Definition: aptx.h:32
AVFormatContext
Format I/O context.
Definition: avformat.h:1213
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
ogg_stream::flags
int flags
Definition: oggdec.h:75
av_channel_layout_default
void av_channel_layout_default(AVChannelLayout *ch_layout, int nb_channels)
Get the default channel layout for a given number of channels.
Definition: channel_layout.c:960
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:212
speex_packet
static int speex_packet(AVFormatContext *s, int idx)
Definition: oggparsespeex.c:113
ogg::streams
struct ogg_stream * streams
Definition: oggdec.h:102
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:177
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:79
speex_header
static int speex_header(AVFormatContext *s, int idx)
Definition: oggparsespeex.c:38
ogg_stream::private
void * private
Definition: oggdec.h:90
speex_params::packet_size
int packet_size
Definition: oggparsespeex.c:33
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
ogg_stream
Definition: oggdec.h:60
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:264
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:948
avformat.h
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
oggdec.h
speex_params::final_packet_duration
int final_packet_duration
Definition: oggparsespeex.c:34
channel_layout.h
ff_vorbis_stream_comment
int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, const uint8_t *buf, int size)
Parse Vorbis comments and add metadata to an AVStream.
Definition: oggparsevorbis.c:73
ogg_stream::segments
uint8_t segments[255]
Definition: oggdec.h:79
OGG_FLAG_EOS
#define OGG_FLAG_EOS
Definition: oggdec.h:112
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
ogg_stream::psize
unsigned int psize
Definition: oggdec.h:65
ogg_codec
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård.
Definition: oggdec.h:30
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
speex_params::seq
int seq
Definition: oggparsespeex.c:35
ogg_codec::magic
const int8_t * magic
Definition: oggdec.h:31
ff_speex_codec
const struct ogg_codec ff_speex_codec
Definition: oggparsespeex.c:143
ogg_stream::pduration
unsigned int pduration
Definition: oggdec.h:67
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:238