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
43typedef 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
54static 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
114static 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
145static 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
153static 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
166static 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
175static 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
183AVInputFormat 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