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;
47     int32_t last_sector;
48 
49     /* private options */
50     int speed;
51     int paranoia_mode;
52 } CDIOContext;
53 
read_header(AVFormatContext * ctx)54 static av_cold int read_header(AVFormatContext *ctx)
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->filename, CDDA_MESSAGE_LOGIT, &err);
64     if (!s->drive) {
65         av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->filename);
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->filename);
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 
88     st->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
89     if (s->drive->bigendianp)
90         st->codec->codec_id    = AV_CODEC_ID_PCM_S16BE;
91     else
92         st->codec->codec_id    = AV_CODEC_ID_PCM_S16LE;
93     st->codec->sample_rate     = 44100;
94     st->codec->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->codec->channels*st->codec->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 
read_packet(AVFormatContext * ctx,AVPacket * pkt)114 static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
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 
read_close(AVFormatContext * ctx)145 static av_cold int read_close(AVFormatContext *ctx)
146 {
147     CDIOContext *s = ctx->priv_data;
148     cdio_paranoia_free(s->paranoia);
149     cdio_cddap_close(s->drive);
150     return 0;
151 }
152 
read_seek(AVFormatContext * ctx,int stream_index,int64_t timestamp,int flags)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",              "Drive reading speed.", OFFSET(speed),         AV_OPT_TYPE_INT,   { .i64 = 0 }, 0,       INT_MAX, DEC },
168     { "paranoia_mode",      "Error recovery mode.", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" },
169         { "verify",         "Verify data integrity in overlap area", 0,    AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_VERIFY },    0, 0, DEC, "paranoia_mode" },
170         { "overlap",        "Perform overlapped reads.",             0,    AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_OVERLAP },   0, 0, DEC, "paranoia_mode" },
171         { "neverskip",      "Do not skip failed reads.",             0,    AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" },
172     { NULL },
173 };
174 
175 static const AVClass libcdio_class = {
176     .class_name = "libcdio indev",
177     .item_name  = av_default_item_name,
178     .option     = options,
179     .version    = LIBAVUTIL_VERSION_INT,
180     .category   = AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT,
181 };
182 
183 AVInputFormat ff_libcdio_demuxer = {
184     .name           = "libcdio",
185     .read_header    = read_header,
186     .read_packet    = read_packet,
187     .read_close     = read_close,
188     .read_seek      = read_seek,
189     .priv_data_size = sizeof(CDIOContext),
190     .flags          = AVFMT_NOFILE,
191     .priv_class     = &libcdio_class,
192 };
193