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lavd: add libcdio-paranoia input device for audio CD grabbing
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,186 @@ | ||
| /* | ||
| * 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 | ||
| */ | ||
|
|
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| #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" | ||
|
|
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| /* cdio returns some malloced strings that need to be free()d */ | ||
| #undef free | ||
|
|
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| 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); | ||
| } | ||
|
|
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| cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT); | ||
| if (s->speed) | ||
| cdio_cddap_speed_set(s->drive, s->speed); | ||
|
|
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| 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); | ||
|
|
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| 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); | ||
|
|
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| 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); | ||
| } | ||
|
|
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| s->last_sector = cdio_cddap_disc_lastsector(s->drive); | ||
|
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| return 0; | ||
| } | ||
|
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| static int read_packet(AVFormatContext *ctx, AVPacket *pkt) | ||
| { | ||
| CDIOContext *s = ctx->priv_data; | ||
| int ret; | ||
| uint16_t *buf; | ||
| char *err = NULL; | ||
|
|
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| if (ctx->streams[0]->cur_dts > s->last_sector) | ||
| return AVERROR_EOF; | ||
|
|
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| buf = cdio_paranoia_read(s->paranoia, NULL); | ||
| if (!buf) | ||
| return AVERROR_EOF; | ||
|
|
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| 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; | ||
| } | ||
|
|
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| 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; | ||
| } | ||
|
|
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| static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, | ||
| int flags) | ||
| { | ||
| CDIOContext *s = ctx->priv_data; | ||
| AVStream *st = ctx->streams[0]; | ||
|
|
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| cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET); | ||
| st->cur_dts = timestamp; | ||
| return 0; | ||
| } | ||
|
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| #define OFFSET(x) offsetof(CDIOContext, x) | ||
| #define DEC AV_OPT_FLAG_DECODING_PARAM | ||
| static const AVOption options[] = { | ||
| { "speed", "Drive reading speed.", OFFSET(speed), FF_OPT_TYPE_INT, { 0 }, 0, INT_MAX, DEC }, | ||
| { "paranoia_mode", "Error recovery mode.", OFFSET(paranoia_mode), FF_OPT_TYPE_FLAGS, { 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" }, | ||
| { "verify", "Verify data integrity in overlap area", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_VERIFY }, 0, 0, DEC, "paranoia_mode" }, | ||
| { "overlap", "Perform overlapped reads.", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_OVERLAP }, 0, 0, DEC, "paranoia_mode" }, | ||
| { "neverskip", "Do not skip failed reads.", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" }, | ||
| { NULL }, | ||
| }; | ||
|
|
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| 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, | ||
| }; |