text: /*
   * 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 "config.h"
  
  #if HAVE_CDIO_PARANOIA_H
  #include <cdio/cdda.h>
  #include <cdio/paranoia.h>
  #elif HAVE_CDIO_PARANOIA_PARANOIA_H
  #include <cdio/paranoia/cdda.h>
  #include <cdio/paranoia/paranoia.h>
  #endif
  
  #include "libavutil/log.h"
  #include "libavutil/mem.h"
  #include "libavutil/opt.h"
  
  #include "libavformat/avformat.h"
  #include "libavformat/internal.h"
  
  typedef struct CDIOContext {
      const AVClass       *class;
      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)
  {
      CDIOContext *s = ctx->priv_data;
      AVStream *st;
      int ret, i;
      char *err = NULL;
  
      if (!(st = avformat_new_stream(ctx, NULL)))
          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    = AV_CODEC_ID_PCM_S16BE;
      else
          st->codec->codec_id    = AV_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;
      avpriv_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);
          avpriv_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[] = {
      { "speed",              "Drive reading speed.", OFFSET(speed),         AV_OPT_TYPE_INT,   { .i64 = 0 }, 0,       INT_MAX, DEC },
      { "paranoia_mode",      "Error recovery mode.", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" },
          { "verify",         "Verify data integrity in overlap area", 0,    AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_VERIFY },    0, 0, DEC, "paranoia_mode" },
          { "overlap",        "Perform overlapped reads.",             0,    AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_OVERLAP },   0, 0, DEC, "paranoia_mode" },
          { "neverskip",      "Do not skip failed reads.",             0,    AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" },
      { 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,
  };
  