libcdio.c 6.01 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161
/*
 * Copyright (c) 2011 Anton Khirnov <anton@khirnov.net>
 *
 * This file is part of Libav.
 *
 * Libav is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * Libav is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * libcdio CD grabbing
 */

#include <cdio/cdda.h>
#include <cdio/paranoia.h>

#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"

#include "libavformat/avformat.h"
#include "libavformat/internal.h"

/* cdio returns some malloced strings that need to be free()d */
#undef free

typedef struct CDIOContext {
    cdrom_drive_t       *drive;
    cdrom_paranoia_t *paranoia;
    int32_t last_sector;

    /* private options */
    int speed;
    int paranoia_mode;
} CDIOContext;

static av_cold int read_header(AVFormatContext *ctx, AVFormatParameters *ap)
{
    CDIOContext *s = ctx->priv_data;
    AVStream *st;
    int ret, i;
    char *err = NULL;

    if (!(st = av_new_stream(ctx, 0)))
        return AVERROR(ENOMEM);
    s->drive = cdio_cddap_identify(ctx->filename, CDDA_MESSAGE_LOGIT, &err);
    if (!s->drive) {
        av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->filename);
        return AVERROR(EINVAL);
    }
    if (err) {
        av_log(ctx, AV_LOG_VERBOSE, "%s\n", err);
        free(err);
    }
    if ((ret = cdio_cddap_open(s->drive)) < 0 || !s->drive->opened) {
        av_log(ctx, AV_LOG_ERROR, "Could not open disk in drive %s.\n", ctx->filename);
        return AVERROR(EINVAL);
    }

    cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT);
    if (s->speed)
        cdio_cddap_speed_set(s->drive, s->speed);

    s->paranoia = cdio_paranoia_init(s->drive);
    if (!s->paranoia) {
        av_log(ctx, AV_LOG_ERROR, "Could not init paranoia.\n");
        return AVERROR(EINVAL);
    }
    cdio_paranoia_modeset(s->paranoia, s->paranoia_mode);

    st->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
    if (s->drive->bigendianp)
        st->codec->codec_id    = CODEC_ID_PCM_S16BE;
    else
        st->codec->codec_id    = CODEC_ID_PCM_S16LE;
    st->codec->sample_rate     = 44100;
    st->codec->channels        = 2;
    if (s->drive->audio_last_sector != CDIO_INVALID_LSN &&
        s->drive->audio_first_sector != CDIO_INVALID_LSN)
        st->duration           = s->drive->audio_last_sector - s->drive->audio_first_sector;
    else if (s->drive->tracks)
        st->duration = s->drive->disc_toc[s->drive->tracks].dwStartSector;
    av_set_pts_info(st, 64, CDIO_CD_FRAMESIZE_RAW, 2*st->codec->channels*st->codec->sample_rate);

    for (i = 0; i < s->drive->tracks; i++) {
        char title[16];
        snprintf(title, sizeof(title), "track %02d", s->drive->disc_toc[i].bTrack);
        ff_new_chapter(ctx, i, st->time_base, s->drive->disc_toc[i].dwStartSector,
                       s->drive->disc_toc[i+1].dwStartSector, title);
    }

    s->last_sector = cdio_cddap_disc_lastsector(s->drive);

    return 0;
}

static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
{
    CDIOContext *s = ctx->priv_data;
    int ret;
    uint16_t *buf;
    char *err = NULL;

    if (ctx->streams[0]->cur_dts > s->last_sector)
        return AVERROR_EOF;

    buf = cdio_paranoia_read(s->paranoia, NULL);
    if (!buf)
        return AVERROR_EOF;

    if (err = cdio_cddap_errors(s->drive)) {
        av_log(ctx, AV_LOG_ERROR, "%s\n", err);
        free(err);
        err = NULL;
    }
    if (err = cdio_cddap_messages(s->drive)) {
        av_log(ctx, AV_LOG_VERBOSE, "%s\n", err);
        free(err);
        err = NULL;
    }

    if ((ret = av_new_packet(pkt, CDIO_CD_FRAMESIZE_RAW)) < 0)
        return ret;
    memcpy(pkt->data, buf, CDIO_CD_FRAMESIZE_RAW);
    return 0;
}

static av_cold int read_close(AVFormatContext *ctx)
{
    CDIOContext *s = ctx->priv_data;
    cdio_paranoia_free(s->paranoia);
    cdio_cddap_close(s->drive);
    return 0;
}

static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp,
                     int flags)
{
    CDIOContext *s = ctx->priv_data;
    AVStream *st = ctx->streams[0];

    cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET);
    st->cur_dts = timestamp;
    return 0;
}

#define OFFSET(x) offsetof(CDIOContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
162 163 164 165 166
    { "speed",              "Drive reading speed.", OFFSET(speed),         AV_OPT_TYPE_INT,   { 0 }, 0,       INT_MAX, DEC },
    { "paranoia_mode",      "Error recovery mode.", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" },
        { "verify",         "Verify data integrity in overlap area", 0,    AV_OPT_TYPE_CONST, { PARANOIA_MODE_VERIFY },    0, 0, DEC, "paranoia_mode" },
        { "overlap",        "Perform overlapped reads.",             0,    AV_OPT_TYPE_CONST, { PARANOIA_MODE_OVERLAP },   0, 0, DEC, "paranoia_mode" },
        { "neverskip",      "Do not skip failed reads.",             0,    AV_OPT_TYPE_CONST, { PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" },
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186
    { NULL },
};

static const AVClass libcdio_class = {
    .class_name = "libcdio indev",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

AVInputFormat ff_libcdio_demuxer = {
    .name           = "libcdio",
    .read_header    = read_header,
    .read_packet    = read_packet,
    .read_close     = read_close,
    .read_seek      = read_seek,
    .priv_data_size = sizeof(CDIOContext),
    .flags          = AVFMT_NOFILE,
    .priv_class     = &libcdio_class,
};