mirror of https://github.com/FFmpeg/FFmpeg.git
Anton Khirnov
13 years ago
parent
85d982f1e2
commit
e417d80d28
6 changed files with 198 additions and 1 deletions
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/*
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* Copyright (c) 2011 Anton Khirnov <anton@khirnov.net> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* libcdio CD grabbing |
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*/ |
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#include <cdio/cdda.h> |
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#include <cdio/paranoia.h> |
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#include "libavutil/log.h" |
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#include "libavutil/mem.h" |
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#include "libavutil/opt.h" |
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#include "libavformat/avformat.h" |
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#include "libavformat/internal.h" |
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/* cdio returns some malloced strings that need to be free()d */ |
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#undef free |
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typedef struct CDIOContext { |
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cdrom_drive_t *drive; |
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cdrom_paranoia_t *paranoia; |
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int32_t last_sector; |
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/* private options */ |
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int speed; |
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int paranoia_mode; |
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} CDIOContext; |
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static av_cold int read_header(AVFormatContext *ctx, AVFormatParameters *ap) |
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{ |
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CDIOContext *s = ctx->priv_data; |
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AVStream *st; |
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int ret, i; |
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char *err = NULL; |
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if (!(st = av_new_stream(ctx, 0))) |
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return AVERROR(ENOMEM); |
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s->drive = cdio_cddap_identify(ctx->filename, CDDA_MESSAGE_LOGIT, &err); |
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if (!s->drive) { |
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av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->filename); |
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return AVERROR(EINVAL); |
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} |
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if (err) { |
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av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); |
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free(err); |
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} |
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if ((ret = cdio_cddap_open(s->drive)) < 0 || !s->drive->opened) { |
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av_log(ctx, AV_LOG_ERROR, "Could not open disk in drive %s.\n", ctx->filename); |
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return AVERROR(EINVAL); |
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} |
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cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT); |
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if (s->speed) |
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cdio_cddap_speed_set(s->drive, s->speed); |
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s->paranoia = cdio_paranoia_init(s->drive); |
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if (!s->paranoia) { |
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av_log(ctx, AV_LOG_ERROR, "Could not init paranoia.\n"); |
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return AVERROR(EINVAL); |
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} |
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cdio_paranoia_modeset(s->paranoia, s->paranoia_mode); |
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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if (s->drive->bigendianp) |
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st->codec->codec_id = CODEC_ID_PCM_S16BE; |
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else |
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st->codec->codec_id = CODEC_ID_PCM_S16LE; |
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st->codec->sample_rate = 44100; |
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st->codec->channels = 2; |
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if (s->drive->audio_last_sector != CDIO_INVALID_LSN && |
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s->drive->audio_first_sector != CDIO_INVALID_LSN) |
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st->duration = s->drive->audio_last_sector - s->drive->audio_first_sector; |
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else if (s->drive->tracks) |
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st->duration = s->drive->disc_toc[s->drive->tracks].dwStartSector; |
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av_set_pts_info(st, 64, CDIO_CD_FRAMESIZE_RAW, 2*st->codec->channels*st->codec->sample_rate); |
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for (i = 0; i < s->drive->tracks; i++) { |
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char title[16]; |
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snprintf(title, sizeof(title), "track %02d", s->drive->disc_toc[i].bTrack); |
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ff_new_chapter(ctx, i, st->time_base, s->drive->disc_toc[i].dwStartSector, |
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s->drive->disc_toc[i+1].dwStartSector, title); |
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} |
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s->last_sector = cdio_cddap_disc_lastsector(s->drive); |
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return 0; |
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} |
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static int read_packet(AVFormatContext *ctx, AVPacket *pkt) |
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{ |
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CDIOContext *s = ctx->priv_data; |
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int ret; |
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uint16_t *buf; |
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char *err = NULL; |
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if (ctx->streams[0]->cur_dts > s->last_sector) |
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return AVERROR_EOF; |
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buf = cdio_paranoia_read(s->paranoia, NULL); |
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if (!buf) |
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return AVERROR_EOF; |
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if (err = cdio_cddap_errors(s->drive)) { |
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av_log(ctx, AV_LOG_ERROR, "%s\n", err); |
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free(err); |
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err = NULL; |
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} |
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if (err = cdio_cddap_messages(s->drive)) { |
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av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); |
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free(err); |
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err = NULL; |
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} |
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if ((ret = av_new_packet(pkt, CDIO_CD_FRAMESIZE_RAW)) < 0) |
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return ret; |
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memcpy(pkt->data, buf, CDIO_CD_FRAMESIZE_RAW); |
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return 0; |
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} |
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static av_cold int read_close(AVFormatContext *ctx) |
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{ |
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CDIOContext *s = ctx->priv_data; |
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cdio_paranoia_free(s->paranoia); |
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cdio_cddap_close(s->drive); |
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return 0; |
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} |
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static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, |
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int flags) |
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{ |
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CDIOContext *s = ctx->priv_data; |
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AVStream *st = ctx->streams[0]; |
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cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET); |
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st->cur_dts = timestamp; |
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return 0; |
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} |
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#define OFFSET(x) offsetof(CDIOContext, x) |
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#define DEC AV_OPT_FLAG_DECODING_PARAM |
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static const AVOption options[] = { |
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{ "speed", "Drive reading speed.", OFFSET(speed), FF_OPT_TYPE_INT, { 0 }, 0, INT_MAX, DEC }, |
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{ "paranoia_mode", "Error recovery mode.", OFFSET(paranoia_mode), FF_OPT_TYPE_FLAGS, { 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" }, |
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{ "verify", "Verify data integrity in overlap area", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_VERIFY }, 0, 0, DEC, "paranoia_mode" }, |
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{ "overlap", "Perform overlapped reads.", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_OVERLAP }, 0, 0, DEC, "paranoia_mode" }, |
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{ "neverskip", "Do not skip failed reads.", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" }, |
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{ NULL }, |
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}; |
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static const AVClass libcdio_class = { |
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.class_name = "libcdio indev", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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AVInputFormat ff_libcdio_demuxer = { |
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.name = "libcdio", |
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.read_header = read_header, |
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.read_packet = read_packet, |
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.read_close = read_close, |
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.read_seek = read_seek, |
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.priv_data_size = sizeof(CDIOContext), |
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.flags = AVFMT_NOFILE, |
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.priv_class = &libcdio_class, |
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}; |
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