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libquvi.c
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1 /*
2  * Copyright (c) 2013 Clément Bœsch
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <quvi/quvi.h>
22 
23 #include "libavformat/avformat.h"
24 #include "libavformat/internal.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/opt.h"
27 
28 typedef struct {
29  const AVClass *class;
30  char *format;
33 
34 #define OFFSET(x) offsetof(LibQuviContext, x)
35 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
36 static const AVOption libquvi_options[] = {
37  { "format", "request specific format", OFFSET(format), AV_OPT_TYPE_STRING, {.str="best"}, .flags = FLAGS },
38  { NULL }
39 };
40 
42  .class_name = "libquvi",
43  .item_name = av_default_item_name,
44  .option = libquvi_options,
45  .version = LIBAVUTIL_VERSION_INT,
46 };
47 
49 {
50  LibQuviContext *qc = s->priv_data;
51  if (qc->fmtctx)
53  return 0;
54 }
55 
57 {
58  int i, ret;
59  quvi_t q;
60  quvi_media_t m;
61  QUVIcode rc;
62  LibQuviContext *qc = s->priv_data;
63  char *media_url, *pagetitle;
64 
65  rc = quvi_init(&q);
66  if (rc != QUVI_OK)
67  goto quvi_fail;
68 
69  quvi_setopt(q, QUVIOPT_FORMAT, qc->format);
70 
71  rc = quvi_parse(q, s->filename, &m);
72  if (rc != QUVI_OK)
73  goto quvi_fail;
74 
75  rc = quvi_getprop(m, QUVIPROP_MEDIAURL, &media_url);
76  if (rc != QUVI_OK)
77  goto quvi_fail;
78 
79  if ((ret = ff_copy_whitelists(qc->fmtctx, s)) < 0)
80  goto end;
81 
82  ret = avformat_open_input(&qc->fmtctx, media_url, NULL, NULL);
83  if (ret < 0)
84  goto end;
85 
86  rc = quvi_getprop(m, QUVIPROP_PAGETITLE, &pagetitle);
87  if (rc == QUVI_OK)
88  av_dict_set(&s->metadata, "title", pagetitle, 0);
89 
90  for (i = 0; i < qc->fmtctx->nb_streams; i++) {
92  AVStream *ist = qc->fmtctx->streams[i];
93  if (!st) {
94  ret = AVERROR(ENOMEM);
95  goto end;
96  }
99  }
100 
101  return 0;
102 
103 quvi_fail:
104  av_log(s, AV_LOG_ERROR, "%s\n", quvi_strerror(q, rc));
105  ret = AVERROR_EXTERNAL;
106 
107 end:
108  quvi_parse_close(&m);
109  quvi_close(&q);
110  return ret;
111 }
112 
114 {
115  LibQuviContext *qc = s->priv_data;
116  return av_read_frame(qc->fmtctx, pkt);
117 }
118 
119 static int libquvi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
120 {
121  LibQuviContext *qc = s->priv_data;
122  return av_seek_frame(qc->fmtctx, stream_index, timestamp, flags);
123 }
124 
126 {
127  int score;
128  quvi_t q;
129  QUVIcode rc;
130 
131  rc = quvi_init(&q);
132  if (rc != QUVI_OK)
133  return AVERROR(ENOMEM);
134  score = quvi_supported(q, (char *)p->filename) == QUVI_OK ? AVPROBE_SCORE_EXTENSION : 0;
135  quvi_close(&q);
136  return score;
137 }
138 
140  .name = "libquvi",
141  .long_name = NULL_IF_CONFIG_SMALL("libquvi demuxer"),
142  .priv_data_size = sizeof(LibQuviContext),
148  .priv_class = &libquvi_context_class,
149  .flags = AVFMT_NOFILE,
150 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:669
AVFormatContext * fmtctx
Definition: libquvi.c:31
AVOption.
Definition: opt.h:255
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
const char * filename
Definition: avformat.h:402
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:401
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:3993
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
int num
numerator
Definition: rational.h:44
char * format
Definition: libquvi.c:30
static AVPacket pkt
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:180
Format I/O context.
Definition: avformat.h:1214
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:71
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
static int libquvi_read_header(AVFormatContext *s)
Definition: libquvi.c:56
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3659
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1282
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define av_log(a,...)
static int libquvi_probe(AVProbeData *p)
Definition: libquvi.c:125
unsigned m
Definition: audioconvert.c:187
static const AVOption libquvi_options[]
Definition: libquvi.c:36
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:175
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1423
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:180
simple assert() macros that are a bit more flexible than ISO C assert().
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:814
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1270
static const AVClass libquvi_context_class
Definition: libquvi.c:41
char filename[1024]
input or output filename
Definition: avformat.h:1290
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
ret
Definition: avfilter.c:974
#define OFFSET(x)
Definition: libquvi.c:34
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:619
Stream structure.
Definition: avformat.h:795
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
static int libquvi_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: libquvi.c:113
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
Describe the class of an AVClass context structure.
Definition: log.h:66
static int libquvi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: libquvi.c:119
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:411
This structure contains the data a format has to probe a file.
Definition: avformat.h:401
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1469
int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:136
static int flags
Definition: cpu.c:47
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2131
Main libavformat public API header.
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:418
AVInputFormat ff_libquvi_demuxer
Definition: libquvi.c:139
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:961
int den
denominator
Definition: rational.h:45
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:3631
void * priv_data
Format private data.
Definition: avformat.h:1242
static int libquvi_close(AVFormatContext *s)
Definition: libquvi.c:48
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:581
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:837
#define FLAGS
Definition: libquvi.c:35
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
This structure stores compressed data.
Definition: avcodec.h:1137