FFmpeg
libcdio.c
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1 /*
2  * Copyright (c) 2011 Anton Khirnov <anton@khirnov.net>
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 /**
22  * @file
23  * libcdio CD grabbing
24  */
25 
26 #include "config.h"
27 
28 #if HAVE_CDIO_PARANOIA_H
29 #include <cdio/cdda.h>
30 #include <cdio/paranoia.h>
31 #elif HAVE_CDIO_PARANOIA_PARANOIA_H
32 #include <cdio/paranoia/cdda.h>
33 #include <cdio/paranoia/paranoia.h>
34 #endif
35 
36 #include "libavutil/log.h"
37 #include "libavutil/mem.h"
38 #include "libavutil/opt.h"
39 
40 #include "libavformat/avformat.h"
41 #include "libavformat/internal.h"
42 
43 typedef struct CDIOContext {
44  const AVClass *class;
45  cdrom_drive_t *drive;
46  cdrom_paranoia_t *paranoia;
48 
49  /* private options */
50  int speed;
52 } CDIOContext;
53 
55 {
56  CDIOContext *s = ctx->priv_data;
57  AVStream *st;
58  int ret, i;
59  char *err = NULL;
60 
61  if (!(st = avformat_new_stream(ctx, NULL)))
62  return AVERROR(ENOMEM);
63  s->drive = cdio_cddap_identify(ctx->url, CDDA_MESSAGE_LOGIT, &err);
64  if (!s->drive) {
65  av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->url);
66  return AVERROR(EINVAL);
67  }
68  if (err) {
69  av_log(ctx, AV_LOG_VERBOSE, "%s\n", err);
70  free(err);
71  }
72  if ((ret = cdio_cddap_open(s->drive)) < 0 || !s->drive->opened) {
73  av_log(ctx, AV_LOG_ERROR, "Could not open disk in drive %s.\n", ctx->url);
74  return AVERROR(EINVAL);
75  }
76 
77  cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT);
78  if (s->speed)
79  cdio_cddap_speed_set(s->drive, s->speed);
80 
81  s->paranoia = cdio_paranoia_init(s->drive);
82  if (!s->paranoia) {
83  av_log(ctx, AV_LOG_ERROR, "Could not init paranoia.\n");
84  return AVERROR(EINVAL);
85  }
86  cdio_paranoia_modeset(s->paranoia, s->paranoia_mode);
87 
89  if (s->drive->bigendianp)
91  else
93  st->codecpar->sample_rate = 44100;
94  st->codecpar->channels = 2;
95  if (s->drive->audio_last_sector != CDIO_INVALID_LSN &&
96  s->drive->audio_first_sector != CDIO_INVALID_LSN)
97  st->duration = s->drive->audio_last_sector - s->drive->audio_first_sector;
98  else if (s->drive->tracks)
99  st->duration = s->drive->disc_toc[s->drive->tracks].dwStartSector;
100  avpriv_set_pts_info(st, 64, CDIO_CD_FRAMESIZE_RAW, 2 * st->codecpar->channels * st->codecpar->sample_rate);
101 
102  for (i = 0; i < s->drive->tracks; i++) {
103  char title[16];
104  snprintf(title, sizeof(title), "track %02d", s->drive->disc_toc[i].bTrack);
105  avpriv_new_chapter(ctx, i, st->time_base, s->drive->disc_toc[i].dwStartSector,
106  s->drive->disc_toc[i+1].dwStartSector, title);
107  }
108 
109  s->last_sector = cdio_cddap_disc_lastsector(s->drive);
110 
111  return 0;
112 }
113 
115 {
116  CDIOContext *s = ctx->priv_data;
117  int ret;
118  uint16_t *buf;
119  char *err = NULL;
120 
121  if (ctx->streams[0]->cur_dts > s->last_sector)
122  return AVERROR_EOF;
123 
124  buf = cdio_paranoia_read(s->paranoia, NULL);
125  if (!buf)
126  return AVERROR_EOF;
127 
128  if (err = cdio_cddap_errors(s->drive)) {
129  av_log(ctx, AV_LOG_ERROR, "%s\n", err);
130  free(err);
131  err = NULL;
132  }
133  if (err = cdio_cddap_messages(s->drive)) {
134  av_log(ctx, AV_LOG_VERBOSE, "%s\n", err);
135  free(err);
136  err = NULL;
137  }
138 
139  if ((ret = av_new_packet(pkt, CDIO_CD_FRAMESIZE_RAW)) < 0)
140  return ret;
141  memcpy(pkt->data, buf, CDIO_CD_FRAMESIZE_RAW);
142  return 0;
143 }
144 
146 {
147  CDIOContext *s = ctx->priv_data;
148  cdio_paranoia_free(s->paranoia);
149  cdio_cddap_close(s->drive);
150  return 0;
151 }
152 
153 static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp,
154  int flags)
155 {
156  CDIOContext *s = ctx->priv_data;
157  AVStream *st = ctx->streams[0];
158 
159  cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET);
160  st->cur_dts = timestamp;
161  return 0;
162 }
163 
164 #define OFFSET(x) offsetof(CDIOContext, x)
165 #define DEC AV_OPT_FLAG_DECODING_PARAM
166 static const AVOption options[] = {
167  { "speed", "set drive reading speed", OFFSET(speed), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC },
168  { "paranoia_mode", "set error recovery mode", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { .i64 = PARANOIA_MODE_DISABLE }, INT_MIN, INT_MAX, DEC, "paranoia_mode" },
169  { "disable", "apply no fixups", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_DISABLE }, 0, 0, DEC, "paranoia_mode" },
170  { "verify", "verify data integrity in overlap area", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_VERIFY }, 0, 0, DEC, "paranoia_mode" },
171  { "overlap", "perform overlapped reads", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_OVERLAP }, 0, 0, DEC, "paranoia_mode" },
172  { "neverskip", "do not skip failed reads", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" },
173  { "full", "apply all recovery modes", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_FULL }, 0, 0, DEC, "paranoia_mode" },
174  { NULL },
175 };
176 
177 static const AVClass libcdio_class = {
178  .class_name = "libcdio indev",
179  .item_name = av_default_item_name,
180  .option = options,
181  .version = LIBAVUTIL_VERSION_INT,
183 };
184 
186  .name = "libcdio",
187  .read_header = read_header,
188  .read_packet = read_packet,
189  .read_close = read_close,
190  .read_seek = read_seek,
191  .priv_data_size = sizeof(CDIOContext),
192  .flags = AVFMT_NOFILE,
193  .priv_class = &libcdio_class,
194 };
cdrom_drive_t * drive
Definition: libcdio.c:45
#define NULL
Definition: coverity.c:32
AVOption.
Definition: opt.h:246
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
Memory handling functions.
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:4884
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
static AVPacket pkt
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4585
Format I/O context.
Definition: avformat.h:1358
int64_t cur_dts
Definition: avformat.h:1084
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:72
#define OFFSET(x)
Definition: libcdio.c:164
#define av_cold
Definition: attributes.h:82
AVOptions.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4457
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
uint8_t * data
Definition: avcodec.h:1477
#define AVERROR_EOF
End of file.
Definition: error.h:55
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define av_log(a,...)
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int paranoia_mode
Definition: libcdio.c:51
int32_t last_sector
Definition: libcdio.c:47
char * url
input or output URL.
Definition: avformat.h:1454
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
Stream structure.
Definition: avformat.h:881
static av_cold int read_header(AVFormatContext *ctx)
Definition: libcdio.c:54
static const AVOption options[]
Definition: libcdio.c:166
void * buf
Definition: avisynth_c.h:766
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
Describe the class of an AVClass context structure.
Definition: log.h:67
#define snprintf
Definition: snprintf.h:34
int speed
Definition: libcdio.c:50
#define flags(name, subs,...)
Definition: cbs_av1.c:561
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
int sample_rate
Audio only.
Definition: avcodec.h:4067
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:463
cdrom_paranoia_t * paranoia
Definition: libcdio.c:46
void * priv_data
Format private data.
Definition: avformat.h:1386
#define DEC
Definition: libcdio.c:165
int channels
Audio only.
Definition: avcodec.h:4063
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
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
This structure stores compressed data.
Definition: avcodec.h:1454
AVInputFormat ff_libcdio_demuxer
Definition: libcdio.c:185
static const AVClass libcdio_class
Definition: libcdio.c:177