FFmpeg  2.1.1
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/opt.h"
26 
27 typedef struct {
28  const AVClass *class;
29  char *format;
32 
33 #define OFFSET(x) offsetof(LibQuviContext, x)
34 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
35 static const AVOption libquvi_options[] = {
36  { "format", "request specific format", OFFSET(format), AV_OPT_TYPE_STRING, {.str="best"}, .flags = FLAGS },
37  { NULL }
38 };
39 
41  .class_name = "libquvi",
42  .item_name = av_default_item_name,
43  .option = libquvi_options,
44  .version = LIBAVUTIL_VERSION_INT,
45 };
46 
48 {
49  LibQuviContext *qc = s->priv_data;
50  if (qc->fmtctx)
52  return 0;
53 }
54 
56 {
57  int i, ret;
58  quvi_t q;
59  quvi_media_t m;
60  QUVIcode rc;
61  LibQuviContext *qc = s->priv_data;
62  char *media_url, *pagetitle;
63 
64  rc = quvi_init(&q);
65  if (rc != QUVI_OK)
66  goto quvi_fail;
67 
68  quvi_setopt(q, QUVIOPT_FORMAT, qc->format);
69 
70  rc = quvi_parse(q, s->filename, &m);
71  if (rc != QUVI_OK)
72  goto quvi_fail;
73 
74  rc = quvi_getprop(m, QUVIPROP_MEDIAURL, &media_url);
75  if (rc != QUVI_OK)
76  goto quvi_fail;
77 
78  ret = avformat_open_input(&qc->fmtctx, media_url, NULL, NULL);
79  if (ret < 0)
80  goto end;
81 
82  rc = quvi_getprop(m, QUVIPROP_PAGETITLE, &pagetitle);
83  if (rc == QUVI_OK)
84  av_dict_set(&s->metadata, "title", pagetitle, 0);
85 
86  for (i = 0; i < qc->fmtctx->nb_streams; i++) {
87  AVStream *st = avformat_new_stream(s, NULL);
88  AVStream *ist = qc->fmtctx->streams[i];
89  if (!st) {
90  ret = AVERROR(ENOMEM);
91  goto end;
92  }
95  }
96 
97  return 0;
98 
99 quvi_fail:
100  av_log(s, AV_LOG_ERROR, "%s\n", quvi_strerror(q, rc));
101  ret = AVERROR_EXTERNAL;
102 
103 end:
104  quvi_parse_close(&m);
105  quvi_close(&q);
106  return ret;
107 }
108 
110 {
111  LibQuviContext *qc = s->priv_data;
112  return av_read_frame(qc->fmtctx, pkt);
113 }
114 
115 static int libquvi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
116 {
117  LibQuviContext *qc = s->priv_data;
118  return av_seek_frame(qc->fmtctx, stream_index, timestamp, flags);
119 }
120 
122 {
123  int score;
124  quvi_t q;
125  QUVIcode rc;
126 
127  rc = quvi_init(&q);
128  if (rc != QUVI_OK)
129  return AVERROR(ENOMEM);
130  score = quvi_supported(q, (char *)p->filename) == QUVI_OK ? AVPROBE_SCORE_EXTENSION : 0;
131  quvi_close(&q);
132  return score;
133 }
134 
136  .name = "libquvi",
137  .long_name = NULL_IF_CONFIG_SMALL("libquvi demuxer"),
138  .priv_data_size = sizeof(LibQuviContext),
144  .priv_class = &libquvi_context_class,
145  .flags = AVFMT_NOFILE,
146 };
#define AVERROR_EXTERNAL
const char * s
Definition: avisynth_c.h:668
AVFormatContext * fmtctx
Definition: libquvi.c:30
AVOption.
Definition: opt.h:253
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:478
#define LIBAVUTIL_VERSION_INT
Definition: avcodec.h:820
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:487
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:3922
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:686
int num
numerator
Definition: rational.h:44
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
char * format
Definition: libquvi.c:29
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:185
Format I/O context.
Definition: avformat.h:968
const char * av_default_item_name(void *ctx)
Return the context name.
Definition: log.c:145
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:55
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
static int libquvi_read_header(AVFormatContext *s)
Definition: libquvi.c:55
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:347
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3348
static int libquvi_probe(AVProbeData *p)
Definition: libquvi.c:121
static const AVOption libquvi_options[]
Definition: libquvi.c:35
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
void * priv_data
Format private data.
Definition: avformat.h:988
char filename[1024]
input or output filename
Definition: avformat.h:1018
unsigned m
Definition: audioconvert.c:186
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
unsigned int nb_streams
A list of all streams in the file.
Definition: avformat.h:1015
static const AVClass libquvi_context_class
Definition: libquvi.c:40
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:54
ret
Definition: avfilter.c:961
const char * filename
Definition: avformat.h:335
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:341
AVStream ** streams
Definition: avformat.h:1016
#define OFFSET(x)
Definition: libquvi.c:33
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:592
Stream structure.
Definition: avformat.h:667
static int libquvi_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: libquvi.c:109
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
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:62
Describe the class of an AVClass context structure.
Definition: log.h:50
AVDictionary * metadata
Definition: avformat.h:1128
static int libquvi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: libquvi.c:115
This structure contains the data a format has to probe a file.
Definition: avformat.h:334
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1432
static int flags
Definition: cpu.c:45
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2061
AVInputFormat ff_libquvi_demuxer
Definition: libquvi.c:135
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:784
int den
denominator
Definition: rational.h:45
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:3309
#define AVERROR(e)
static int libquvi_close(AVFormatContext *s)
Definition: libquvi.c:47
static AVPacket pkt
Definition: demuxing.c:52
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:703
#define FLAGS
Definition: libquvi.c:34
This structure stores compressed data.
Definition: avcodec.h:1040