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[76.141.249.38]) by smtp-relay.gmail.com with ESMTPS id ne5-20020a0568705e4500b00218da56b401sm11736oac.34.2024.02.09.14.48.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Feb 2024 14:48:44 -0800 (PST) X-Relaying-Domain: proxyid.net From: Marth64 To: ffmpeg-devel@ffmpeg.org Date: Fri, 9 Feb 2024 16:48:40 -0600 Message-Id: <20240209224841.1597122-1-marth64@proxyid.net> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH v12 1/2] libavformat: add DVD-Video demuxer, powered by libdvdnav and libdvdread X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: Marth64 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: oecviwCDJ5Yf - Fixes anticipated feedback about bprint_finalize() - Fixes anticipated documentation typo - Removes unnecessary constant Signed-off-by: Marth64 --- Changelog | 2 + configure | 8 + doc/demuxers.texi | 130 ++++ libavformat/Makefile | 1 + libavformat/allformats.c | 1 + libavformat/dvdvideodec.c | 1423 +++++++++++++++++++++++++++++++++++++ 6 files changed, 1565 insertions(+) create mode 100644 libavformat/dvdvideodec.c diff --git a/Changelog b/Changelog index c5fb21d198..88653bc6d3 100644 --- a/Changelog +++ b/Changelog @@ -24,6 +24,8 @@ version : - ffmpeg CLI options may now be used as -/opt , which is equivalent to -opt > - showinfo bitstream filter +- DVD-Video demuxer, powered by libdvdnav and libdvdread + version 6.1: - libaribcaption decoder diff --git a/configure b/configure index f72533b7d2..831b9f6cb6 100755 --- a/configure +++ b/configure @@ -227,6 +227,8 @@ External library support: --enable-libdavs2 enable AVS2 decoding via libdavs2 [no] --enable-libdc1394 enable IIDC-1394 grabbing using libdc1394 and libraw1394 [no] + --enable-libdvdnav enable libdvdnav, needed for DVD demuxing [no] + --enable-libdvdread enable libdvdread, needed for DVD demuxing [no] --enable-libfdk-aac enable AAC de/encoding via libfdk-aac [no] --enable-libflite enable flite (voice synthesis) support via libflite [no] --enable-libfontconfig enable libfontconfig, useful for drawtext filter [no] @@ -1806,6 +1808,8 @@ EXTERNAL_LIBRARY_GPL_LIST=" frei0r libcdio libdavs2 + libdvdnav + libdvdread librubberband libvidstab libx264 @@ -3523,6 +3527,8 @@ dts_demuxer_select="dca_parser" dtshd_demuxer_select="dca_parser" dv_demuxer_select="dvprofile" dv_muxer_select="dvprofile" +dvdvideo_demuxer_select="mpegps_demuxer" +dvdvideo_demuxer_deps="libdvdnav libdvdread" dxa_demuxer_select="riffdec" eac3_demuxer_select="ac3_parser" evc_demuxer_select="evc_frame_merge_bsf evc_parser" @@ -6771,6 +6777,8 @@ enabled libdav1d && require_pkg_config libdav1d "dav1d >= 0.5.0" "dav1d enabled libdavs2 && require_pkg_config libdavs2 "davs2 >= 1.6.0" davs2.h davs2_decoder_open enabled libdc1394 && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new enabled libdrm && check_pkg_config libdrm libdrm xf86drm.h drmGetVersion +enabled libdvdnav && require_pkg_config libdvdnav "dvdnav >= 6.1.1" dvdnav/dvdnav.h dvdnav_open2 +enabled libdvdread && require_pkg_config libdvdread "dvdread >= 6.1.2" dvdread/dvd_reader.h DVDOpen2 -ldvdread enabled libfdk_aac && { check_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen || { require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac && warn "using libfdk without pkg-config"; } } diff --git a/doc/demuxers.texi b/doc/demuxers.texi index e4c5b560a6..062ea2ea42 100644 --- a/doc/demuxers.texi +++ b/doc/demuxers.texi @@ -285,6 +285,136 @@ This demuxer accepts the following option: @end table +@section dvdvideo + +DVD-Video demuxer, powered by libdvdnav and libdvdread. + +Can directly ingest DVD titles, specifically sequential PGCs, +into a conversion pipeline. Menus and seeking are not supported at this time. + +Block devices (DVD drives), ISO files, and directory structures are accepted. +Activate with @code{-f dvdvideo} in front of one of these inputs. + +Underlying playback is handled by libdvdnav, and structure parsing by libdvdread. +FFmpeg must be built with GPL library support available as well as the +configure switches @code{--enable-libdvdnav} and @code{--enable-libdvdread}. + +You will need to provide either the desired "title number" or exact PGC/PG coordinates. +Many open-source DVD players and tools can aid in providing this information. +If not specified, the demuxer will default to title 1 which works for many discs. +However, due to the flexibility of the format, it is recommended to check manually. +There are many discs that are authored strangely or with invalid headers. + +If the input is a real DVD drive, please note that there are some drives which may +silently fail on reading bad sectors from the disc, returning random bits instead +which is effectively corrupt data. This is especially prominent on aging or rotting discs. +A second pass and integrity checks would be needed to detect the corruption. +This is not an FFmpeg issue. + +@subsection Background + +DVD-Video is not a directly accessible, linear container format in the +traditional sense. Instead, it allows for complex and programmatic playback of +carefully muxed MPEG-PS streams that are stored in headerless VOB files. +To the end-user, these streams are known simply as "titles", but the actual +logical playback sequence is defined by one or more "PGCs", or Program Group Chains, +within the title. The PGC is in turn comprised of multiple "PGs", or Programs", +which are the actual video segments (and for a typical video feature, sequentially +ordered). The PGC structure, along with stream layout and metadata, are stored in +IFO files that need to be parsed. PGCs can be thought of as playlists in easier terms. + +An actual DVD player relies on user GUI interaction via menus and an internal VM +to drive the direction of demuxing. Generally, the user would either navigate (via menus) +or automatically be redirected to the PGC of their choice. During this process and +the subsequent playback, the DVD player's internal VM also maintains a state and +executes instructions that can create jumps to different sectors during playback. +This is why libdvdnav is involved, as a linear read of the MPEG-PS blobs on the +disc (VOBs) is not enough to produce the right sequence in many cases. + +There are many other DVD structures (a long subject) that will not be discussed here. +NAV packets, in particular, are handled by this demuxer to build accurate timing +but not emitted as a stream. For a good high-level understanding, refer to: +@url{https://code.videolan.org/videolan/libdvdnav/-/blob/master/doc/dvd_structures} + +@subsection Options + +This demuxer accepts the following options: + +@table @option + +@item title @var{int} +The title number to play. Must be set if @option{pgc} and @option{pg} are not set. +Default is 0 (auto), which currently only selects the first available title (title 1) +and notifies the user about the implications. + +@item chapter_start @var{int} +The chapter, or PTT (part-of-title), number to start at. Default is 1. + +@item chapter_end @var{int} +The chapter, or PTT (part-of-title), number to end at. Default is 0, +which is a special value to signal end at the last possible chapter. + +@item angle @var{int} +The video angle number, referring to what is essentially an additional +video stream that is composed from alternate frames interleaved in the VOBs. +Default is 1. + +@item region @var{int} +The region code to use for playback. Some discs may use this to default playback +at a particular angle in different regions. This option will not affect the region code +of a real DVD drive, if used as an input. Default is 0, "world". + +@item pgc @var{int} +The entry PGC to start playback, in conjunction with @option{pg}. +Alternative to setting @option{title}. +Chapter markers are not supported at this time. +Default is 0, automatically resolve from value of @option{title}. + +@item pg @var{int} +The entry PG to start playback, in conjunction with @option{pgc}. +Alternative to setting @option{title}. +Chapter markers are not supported at this time. +Default is 0, automatically resolve from value of @option{title}. + +@item preindex @var{bool} +Enable this to have accurate chapter (PTT) markers and duration measurement, +which requires a slow second pass read in order to index the chapter marker +timestamps from NAV packets. This is non-ideal extra work for real optical drives. +It is recommended and faster to use this option with a backup of the DVD structure +stored on a hard drive. Not compatible with @option{pgc} and @option{pg}. +Default is 0, false. + +@item trim @var{bool} +Skip padding cells (i.e. cells shorter than 1 second) from the beginning. +There exist many discs with filler segments at the beginning of the PGC, +often with junk data intended for controlling a real DVD player's +buffering speed and with no other material data value. +Default is 1, true. + +@end table + +@subsection Examples + +@itemize +@item +Open title 3 from a given DVD structure: +@example +ffmpeg -f dvdvideo -title 3 -i ... +@end example + +@item +Open chapters 3-6 from title 1 from a given DVD structure: +@example +ffmpeg -f dvdvideo -chapter_start 3 -chapter_end 6 -title 1 -i ... +@end example + +@item +Open only chapter 5 from title 1 from a given DVD structure: +@example +ffmpeg -f dvdvideo -chapter_start 5 -chapter_end 5 -title 1 -i ... +@end example +@end itemize + @section ea Electronic Arts Multimedia format demuxer. diff --git a/libavformat/Makefile b/libavformat/Makefile index 05b9b8a115..df69734877 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -192,6 +192,7 @@ OBJS-$(CONFIG_DTS_MUXER) += rawenc.o OBJS-$(CONFIG_DV_MUXER) += dvenc.o OBJS-$(CONFIG_DVBSUB_DEMUXER) += dvbsub.o rawdec.o OBJS-$(CONFIG_DVBTXT_DEMUXER) += dvbtxt.o rawdec.o +OBJS-$(CONFIG_DVDVIDEO_DEMUXER) += dvdvideodec.o OBJS-$(CONFIG_DXA_DEMUXER) += dxa.o OBJS-$(CONFIG_EA_CDATA_DEMUXER) += eacdata.o OBJS-$(CONFIG_EA_DEMUXER) += electronicarts.o diff --git a/libavformat/allformats.c b/libavformat/allformats.c index b04b43cab3..3e905c23f8 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -150,6 +150,7 @@ extern const AVInputFormat ff_dv_demuxer; extern const FFOutputFormat ff_dv_muxer; extern const AVInputFormat ff_dvbsub_demuxer; extern const AVInputFormat ff_dvbtxt_demuxer; +extern const AVInputFormat ff_dvdvideo_demuxer; extern const AVInputFormat ff_dxa_demuxer; extern const AVInputFormat ff_ea_demuxer; extern const AVInputFormat ff_ea_cdata_demuxer; diff --git a/libavformat/dvdvideodec.c b/libavformat/dvdvideodec.c new file mode 100644 index 0000000000..36d4ee8f02 --- /dev/null +++ b/libavformat/dvdvideodec.c @@ -0,0 +1,1423 @@ +/* + * DVD-Video demuxer, powered by libdvdnav and libdvdread + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * See doc/demuxers.texi for a high-level overview. + * + * The tactical approach is as follows: + * 1) Open the volume with dvdread + * 2) Analyze the user-requested title and PGC coordinates in the IFO structures + * 3) Request playback at the coordinates and chosen angle with dvdnav + * 5) Begin the playback (reading and demuxing) of MPEG-PS blocks + * 6) End playback if navigation goes backwards, to a menu, or a different PGC or angle + * 7) Close the dvdnav VM, and free dvdread's IFO structures + */ + +#include +#include +#include +#include +#include + +#include "libavcodec/avcodec.h" +#include "libavutil/avstring.h" +#include "libavutil/avutil.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/mem.h" +#include "libavutil/opt.h" +#include "libavutil/samplefmt.h" +#include "libavutil/time.h" +#include "libavutil/timestamp.h" + +#include "avformat.h" +#include "avio_internal.h" +#include "avlanguage.h" +#include "demux.h" +#include "internal.h" +#include "url.h" + +#define DVDVIDEO_MAX_PS_SEARCH_BLOCKS 128 +#define DVDVIDEO_BLOCK_SIZE 2048 +#define DVDVIDEO_TIME_BASE_Q (AVRational) { 1, 90000 } +#define DVDVIDEO_PTS_WRAP_BITS 64 /* VOBUs use 32 (PES allows 33) */ + +#define DVDVIDEO_LIBDVDX_LOG_BUFFER_SIZE 1024 + +enum DVDVideoSubpictureViewport { + DVDVIDEO_SUBP_VIEWPORT_FULLSCREEN, + DVDVIDEO_SUBP_VIEWPORT_WIDESCREEN, + DVDVIDEO_SUBP_VIEWPORT_LETTERBOX, + DVDVIDEO_SUBP_VIEWPORT_PANSCAN +}; +static const char dvdvideo_subp_viewport_labels[4][13] = { + "Fullscreen", "Widescreen", "Letterbox", "Pan and Scan" +}; + +typedef struct DVDVideoVTSVideoStreamEntry { + int startcode; + enum AVCodecID codec_id; + int width; + int height; + AVRational dar; + AVRational framerate; + int has_cc; +} DVDVideoVTSVideoStreamEntry; + +typedef struct DVDVideoPGCAudioStreamEntry { + int startcode; + enum AVCodecID codec_id; + int sample_fmt; + int sample_rate; + int bit_depth; + int nb_channels; + AVChannelLayout ch_layout; + int disposition; + const char *lang_iso; +} DVDVideoPGCAudioStreamEntry; + +typedef struct DVDVideoPGCSubtitleStreamEntry { + int startcode; + enum DVDVideoSubpictureViewport viewport; + int disposition; + const char *lang_iso; +} DVDVideoPGCSubtitleStreamEntry; + +typedef struct DVDVideoPlaybackState { + int celln; /* ID of the active cell */ + int entry_pgn; /* ID of the PG we are starting in */ + int in_pgc; /* if our navigator is in the PGC */ + int in_ps; /* if our navigator is in the program stream */ + int in_vts; /* if our navigator is in the VTS */ + int64_t nav_pts; /* PTS according to IFO, not frame-accurate */ + int nb_cells_played; /* number of cells played back so far */ + uint64_t pgc_duration_est; /* estimated duration as reported by IFO */ + uint64_t pgc_elapsed; /* the elapsed time of the PGC, cell-relative */ + int pgc_nb_pg_est; /* number of PGs as reported by IFOs */ + int pgcn; /* ID of the PGC we are playing */ + int pgn; /* ID of the PG we are in now */ + int ptt; /* ID of the chapter we are in now */ + int64_t ts_offset; /* PTS discontinuity offset (ex. VOB change) */ + uint32_t vobu_duration; /* duration of the current VOBU */ + uint32_t vobu_e_ptm; /* end PTS of the current VOBU */ + int vtsn; /* ID of the active VTS (video title set) */ + uint64_t *pgc_pg_times_est; /* PG start times as reported by IFO */ + pgc_t *pgc; /* handle to the active PGC */ + dvdnav_t *dvdnav; /* handle to libdvdnav */ +} DVDVideoPlaybackState; + +typedef struct DVDVideoDemuxContext { + const AVClass *class; + + /* options */ + int opt_angle; /* the user-provided angle number (1-indexed) */ + int opt_chapter_end; /* the user-provided exit PTT (0 for last) */ + int opt_chapter_start; /* the user-provided entry PTT (1-indexed) */ + int opt_pg; /* the user-provided PG number (1-indexed) */ + int opt_pgc; /* the user-provided PGC number (1-indexed) */ + int opt_preindex; /* pre-indexing mode (2-pass read) */ + int opt_region; /* the user-provided region digit */ + int opt_title; /* the user-provided title number (1-indexed) */ + int opt_trim; /* trim padding cells at beginning */ + + /* subdemux */ + const AVInputFormat *mpeg_fmt; /* inner MPEG-PS (VOB) demuxer */ + AVFormatContext *mpeg_ctx; /* context for inner demuxer */ + uint8_t *mpeg_buf; /* buffer for inner demuxer */ + FFIOContext mpeg_pb; /* buffer context for inner demuxer */ + + /* volume */ + dvd_reader_t *dvdread; /* handle to libdvdread */ + ifo_handle_t *vmg_ifo; /* handle to the VMG (VIDEO_TS.IFO) */ + ifo_handle_t *vts_ifo; /* handle to the active VTS (VTS_nn_n.IFO) */ + + /* playback control */ + int64_t first_pts; /* the starting PTS offset of the PGC */ + uint64_t duration_ptm; /* total duration in DVD MPEG timebase */ + int play_end; /* signal EOF to the parent demuxer */ + DVDVideoPlaybackState play_state; /* the active playback state */ + int play_started; /* signal that playback has started */ + int segment_started; /* signal that subdemuxer is on a segment */ +} DVDVideoDemuxContext; + +static void dvdvideo_libdvdread_log(void *opaque, dvd_logger_level_t level, + const char *msg, va_list msg_va) +{ + AVFormatContext *s = opaque; + char msg_buf[DVDVIDEO_LIBDVDX_LOG_BUFFER_SIZE]; + int lavu_level = AV_LOG_DEBUG; + + vsnprintf(msg_buf, sizeof(msg_buf), msg, msg_va); + + if (level == DVD_LOGGER_LEVEL_ERROR) + lavu_level = AV_LOG_ERROR; + else if (level == DVD_LOGGER_LEVEL_WARN) + lavu_level = AV_LOG_WARNING; + + av_log(s, lavu_level, "libdvdread: %s\n", msg_buf); +} + +static void dvdvideo_libdvdnav_log(void *opaque, dvdnav_logger_level_t level, + const char *msg, va_list msg_va) +{ + AVFormatContext *s = opaque; + char msg_buf[DVDVIDEO_LIBDVDX_LOG_BUFFER_SIZE]; + int lavu_level = AV_LOG_DEBUG; + + vsnprintf(msg_buf, sizeof(msg_buf), msg, msg_va); + + if (level == DVDNAV_LOGGER_LEVEL_ERROR) + lavu_level = AV_LOG_ERROR; + /* some discs have invalid language codes set for menus, which throws noisy warnings */ + else if (level == DVDNAV_LOGGER_LEVEL_WARN && !av_strstart(msg, "Language", NULL)) + lavu_level = AV_LOG_WARNING; + + av_log(s, lavu_level, "libdvdnav: %s\n", msg_buf); +} + +static void dvdvideo_ifo_close(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + if (c->vts_ifo) + ifoClose(c->vts_ifo); + + if (c->vmg_ifo) + ifoClose(c->vmg_ifo); + + if (c->dvdread) + DVDClose(c->dvdread); +} + +static int dvdvideo_ifo_open(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + dvd_logger_cb dvdread_log_cb; + title_info_t title_info; + + dvdread_log_cb = (dvd_logger_cb) { .pf_log = dvdvideo_libdvdread_log }; + c->dvdread = DVDOpen2(s, &dvdread_log_cb, s->url); + + if (!c->dvdread) { + av_log(s, AV_LOG_ERROR, "Unable to open the DVD-Video structure\n"); + + return AVERROR_EXTERNAL; + } + + if (!(c->vmg_ifo = ifoOpen(c->dvdread, 0))) { + av_log(s, AV_LOG_ERROR, "Unable to open the VMG (VIDEO_TS.IFO)\n"); + + return AVERROR_EXTERNAL; + } + + if (c->opt_title > c->vmg_ifo->tt_srpt->nr_of_srpts) { + av_log(s, AV_LOG_ERROR, "Title %d not found\n", c->opt_title); + + return AVERROR_STREAM_NOT_FOUND; + } + + title_info = c->vmg_ifo->tt_srpt->title[c->opt_title - 1]; + if (c->opt_angle > title_info.nr_of_angles) { + av_log(s, AV_LOG_ERROR, "Angle %d not found\n", c->opt_angle); + + return AVERROR_STREAM_NOT_FOUND; + } + + if (title_info.nr_of_ptts < 1) { + av_log(s, AV_LOG_ERROR, "Title %d has invalid headers (no PTTs found)\n", c->opt_title); + + return AVERROR_INVALIDDATA; + } + + if (c->opt_chapter_start > title_info.nr_of_ptts || + (c->opt_chapter_end > 0 && c->opt_chapter_end > title_info.nr_of_ptts)) { + av_log(s, AV_LOG_ERROR, "Chapter (PTT) range [%d, %d] is invalid\n", + c->opt_chapter_start, c->opt_chapter_end); + + return AVERROR_INVALIDDATA; + } + + if (!(c->vts_ifo = ifoOpen(c->dvdread, title_info.title_set_nr))) { + av_log(s, AV_LOG_ERROR, "Unable to process IFO structure for VTS %d\n", + title_info.title_set_nr); + + return AVERROR_EXTERNAL; + } + + if (title_info.vts_ttn < 1 || + title_info.vts_ttn > 99 || + title_info.vts_ttn > c->vts_ifo->vts_ptt_srpt->nr_of_srpts || + c->vts_ifo->vtsi_mat->nr_of_vts_audio_streams > 8 || + c->vts_ifo->vtsi_mat->nr_of_vts_subp_streams > 32) { + + av_log(s, AV_LOG_ERROR, "Title %d has invalid headers in VTS\n", c->opt_title); + return AVERROR_INVALIDDATA; + } + + return 0; +} + +static int dvdvideo_is_cell_promising(AVFormatContext *s, pgc_t *pgc, int celln) +{ + dvd_time_t cell_duration = pgc->cell_playback[celln - 1].playback_time; + + return cell_duration.second >= 1 || cell_duration.minute >= 1 || cell_duration.hour >= 1; +} + +static int dvdvideo_is_pgc_promising(AVFormatContext *s, pgc_t *pgc) +{ + for (int i = 1; i <= pgc->nr_of_cells; i++) + if (dvdvideo_is_cell_promising(s, pgc, i)) + return 1; + + return 0; +} + +static void dvdvideo_play_close(AVFormatContext *s, DVDVideoPlaybackState *state) +{ + if (!state->dvdnav) + return; + + /* not allocated by av_malloc() */ + if (state->pgc_pg_times_est) + free(state->pgc_pg_times_est); + + if (dvdnav_close(state->dvdnav) != DVDNAV_STATUS_OK) + av_log(s, AV_LOG_ERROR, "Unable to close dvdnav successfully, dvdnav error: %s\n", + dvdnav_err_to_string(state->dvdnav)); +} + +static int dvdvideo_play_open(AVFormatContext *s, DVDVideoPlaybackState *state) +{ + DVDVideoDemuxContext *c = s->priv_data; + + dvdnav_logger_cb dvdnav_log_cb; + dvdnav_status_t dvdnav_open_status; + int32_t disc_region_mask; + int32_t player_region_mask; + int cur_title, cur_pgcn, cur_pgn; + pgc_t *pgc; + + dvdnav_log_cb = (dvdnav_logger_cb) { .pf_log = dvdvideo_libdvdnav_log }; + dvdnav_open_status = dvdnav_open2(&state->dvdnav, s, &dvdnav_log_cb, s->url); + + if (!state->dvdnav || + dvdnav_open_status != DVDNAV_STATUS_OK || + dvdnav_set_readahead_flag(state->dvdnav, 0) != DVDNAV_STATUS_OK || + dvdnav_set_PGC_positioning_flag(state->dvdnav, 1) != DVDNAV_STATUS_OK || + dvdnav_get_region_mask(state->dvdnav, &disc_region_mask) != DVDNAV_STATUS_OK) { + + av_log(s, AV_LOG_ERROR, "Unable to open the DVD for playback\n"); + goto end_dvdnav_error; + } + + player_region_mask = c->opt_region > 0 ? (1 << (c->opt_region - 1)) : disc_region_mask; + if (dvdnav_set_region_mask(state->dvdnav, player_region_mask) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to set the playback region code %d\n", c->opt_region); + + goto end_dvdnav_error; + } + + if (c->opt_pgc > 0 && c->opt_pg > 0) { + if (dvdnav_program_play(state->dvdnav, c->opt_title, c->opt_pgc, c->opt_pg) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to start playback at title %d, PGC %d, PG %d\n", + c->opt_title, c->opt_pgc, c->opt_pg); + + goto end_dvdnav_error; + } + + state->pgcn = c->opt_pgc; + state->entry_pgn = c->opt_pg; + } else { + if (dvdnav_part_play(state->dvdnav, c->opt_title, c->opt_chapter_start) != DVDNAV_STATUS_OK || + dvdnav_current_title_program(state->dvdnav, &cur_title, &cur_pgcn, &cur_pgn) != DVDNAV_STATUS_OK) { + + av_log(s, AV_LOG_ERROR, "Unable to start playback at title %d, chapter (PTT) %d\n", + c->opt_title, c->opt_chapter_start); + goto end_dvdnav_error; + } + + state->pgcn = cur_pgcn; + state->entry_pgn = cur_pgn; + } + + pgc = c->vts_ifo->vts_pgcit->pgci_srp[state->pgcn - 1].pgc; + + if (pgc->pg_playback_mode != 0) { + av_log(s, AV_LOG_ERROR, "Non-sequential PGCs, such as shuffles, are not supported\n"); + + return AVERROR_PATCHWELCOME; + } + + if (c->opt_trim && !dvdvideo_is_pgc_promising(s, pgc)) { + av_log(s, AV_LOG_ERROR, "Title %d, PGC %d looks empty (may consist of padding cells), " + "if you want to try anyway, disable the -trim option\n", + c->opt_title, state->pgcn); + + return AVERROR_INVALIDDATA; + } + + if (dvdnav_angle_change(state->dvdnav, c->opt_angle) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to start playback at angle %d\n", c->opt_angle); + + goto end_dvdnav_error; + } + + /* dvdnav_describe_title_chapters() performs several validations on the title structure */ + /* take advantage of this side effect to increase chances of a safe navigation path */ + state->pgc_nb_pg_est = dvdnav_describe_title_chapters(state->dvdnav, c->opt_title, + &state->pgc_pg_times_est, + &state->pgc_duration_est); + + /* dvdnav returning 0 PGs is documented as an error condition */ + if (!state->pgc_nb_pg_est) { + av_log(s, AV_LOG_ERROR, "Unable to read chapter information for title %d\n", c->opt_title); + + goto end_dvdnav_error; + } + + state->nav_pts = dvdnav_get_current_time(state->dvdnav); + state->vtsn = c->vmg_ifo->tt_srpt->title[c->opt_title - 1].title_set_nr; + state->pgc = pgc; + + return 0; + +end_dvdnav_error: + if (state->dvdnav) + av_log(s, AV_LOG_ERROR, "dvdnav error: %s\n", dvdnav_err_to_string(state->dvdnav)); + else + av_log(s, AV_LOG_ERROR, "dvdnav could not be initialized\n"); + + return AVERROR_EXTERNAL; +} + +static int dvdvideo_play_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState *state, + uint8_t *buf, int buf_size, + int *p_nav_event, + void (*flush_cb)(AVFormatContext *s)) +{ + DVDVideoDemuxContext *c = s->priv_data; + + uint8_t nav_buf[DVDVIDEO_BLOCK_SIZE] = {0}; + int nav_event; + int nav_len; + + dvdnav_vts_change_event_t *e_vts; + dvdnav_cell_change_event_t *e_cell; + int cur_title, cur_pgcn, cur_pgn, cur_angle, cur_title_unused, cur_ptt, cur_nb_angles; + int is_cell_promising = 0; + pci_t *e_pci; + dsi_t *e_dsi; + + if (buf_size != DVDVIDEO_BLOCK_SIZE) { + av_log(s, AV_LOG_ERROR, "Invalid buffer size (expected=%d actual=%d)\n", + DVDVIDEO_BLOCK_SIZE, buf_size); + + return AVERROR(EINVAL); + } + + for (int i = 0; i < DVDVIDEO_MAX_PS_SEARCH_BLOCKS; i++) { + if (ff_check_interrupt(&s->interrupt_callback)) + return AVERROR_EXIT; + + if (dvdnav_get_next_block(state->dvdnav, nav_buf, &nav_event, &nav_len) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to read next block of PGC\n"); + + goto end_dvdnav_error; + } + + /* some discs follow NOPs with a premature stop event */ + if (nav_event == DVDNAV_STOP) + return AVERROR_EOF; + + if (nav_len > DVDVIDEO_BLOCK_SIZE) { + av_log(s, AV_LOG_ERROR, "Invalid block size (expected<=%d actual=%d)\n", + DVDVIDEO_BLOCK_SIZE, nav_len); + + return AVERROR_INVALIDDATA; + } + + if (dvdnav_current_title_info(state->dvdnav, &cur_title, &cur_ptt) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to determine current title coordinates\n"); + + goto end_dvdnav_error; + } + + /* we somehow navigated to a menu */ + if (cur_title == 0 || !dvdnav_is_domain_vts(state->dvdnav)) + return AVERROR_EOF; + + if (dvdnav_current_title_program(state->dvdnav, &cur_title_unused, &cur_pgcn, &cur_pgn) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to determine current PGC coordinates\n"); + + goto end_dvdnav_error; + } + + /* we somehow left the PGC */ + if (state->in_pgc && cur_pgcn != state->pgcn) + return AVERROR_EOF; + + if (dvdnav_get_angle_info(state->dvdnav, &cur_angle, &cur_nb_angles) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to determine current video angle\n"); + + goto end_dvdnav_error; + } + + av_log(s, nav_event == DVDNAV_BLOCK_OK ? AV_LOG_TRACE : AV_LOG_DEBUG, + "new block: i=%d nav_event=%d nav_len=%d cur_title=%d " + "cur_ptt=%d cur_angle=%d cur_celln=%d cur_pgcn=%d cur_pgn=%d " + "play_in_vts=%d play_in_pgc=%d play_in_ps=%d\n", + i, nav_event, nav_len, cur_title, + cur_ptt, cur_angle, state->celln, cur_pgcn, cur_pgn, + state->in_vts, state->in_pgc, state->in_ps); + + switch (nav_event) { + case DVDNAV_VTS_CHANGE: + if (state->in_vts) + return AVERROR_EOF; + + e_vts = (dvdnav_vts_change_event_t *) nav_buf; + + if (e_vts->new_vtsN == state->vtsn && e_vts->new_domain == DVD_DOMAIN_VTSTitle) + state->in_vts = 1; + + continue; + case DVDNAV_CELL_CHANGE: + if (!state->in_vts) + continue; + + e_cell = (dvdnav_cell_change_event_t *) nav_buf; + is_cell_promising = !c->opt_trim || dvdvideo_is_cell_promising(s, state->pgc, e_cell->cellN); + + av_log(s, AV_LOG_DEBUG, "new cell: prev=%d new=%d promising=%d\n", + state->celln, e_cell->cellN, is_cell_promising); + + if (!state->in_ps && !state->in_pgc) { + if (cur_title == c->opt_title && + cur_ptt == c->opt_chapter_start && + cur_pgcn == state->pgcn && + cur_pgn == state->entry_pgn && + is_cell_promising) { + state->in_pgc = 1; + } + + if (c->opt_trim && !is_cell_promising) + av_log(s, AV_LOG_INFO, "Skipping padding cell #%d\n", e_cell->cellN); + } else if (state->celln >= e_cell->cellN || state->pgn > cur_pgn) { + return AVERROR_EOF; + } + + state->celln = e_cell->cellN; + state->ptt = cur_ptt; + state->pgn = cur_pgn; + state->nb_cells_played++; + + continue; + case DVDNAV_NAV_PACKET: + if (!state->in_pgc) + continue; + + if ((state->ptt > 0 && state->ptt > cur_ptt) || + (c->opt_chapter_end > 0 && cur_ptt > c->opt_chapter_end)) { + return AVERROR_EOF; + } + + e_pci = dvdnav_get_current_nav_pci(state->dvdnav); + e_dsi = dvdnav_get_current_nav_dsi(state->dvdnav); + + if (e_pci == NULL || e_dsi == NULL || + e_pci->pci_gi.vobu_s_ptm > e_pci->pci_gi.vobu_e_ptm) { + + av_log(s, AV_LOG_ERROR, "Invalid NAV packet\n"); + return AVERROR_INVALIDDATA; + } + + state->vobu_duration = e_pci->pci_gi.vobu_e_ptm - e_pci->pci_gi.vobu_s_ptm; + state->pgc_elapsed += state->vobu_duration; + state->nav_pts = dvdnav_get_current_time(state->dvdnav); + state->ptt = cur_ptt; + state->pgn = cur_pgn; + + av_log(s, AV_LOG_DEBUG, + "NAV pack: s_ptm=%d e_ptm=%d " + "scr=%d lbn=%d vobu_duration=%d nav_pts=%ld\n", + e_pci->pci_gi.vobu_s_ptm, e_pci->pci_gi.vobu_e_ptm, + e_dsi->dsi_gi.nv_pck_scr, + e_pci->pci_gi.nv_pck_lbn, state->vobu_duration, state->nav_pts); + + if (!state->in_ps) { + av_log(s, AV_LOG_DEBUG, "navigation: locked to program stream\n"); + + state->in_ps = 1; + } else { + if (state->vobu_e_ptm != e_pci->pci_gi.vobu_s_ptm) { + if (flush_cb) + flush_cb(s); + + state->ts_offset += state->vobu_e_ptm - e_pci->pci_gi.vobu_s_ptm; + } + } + + state->vobu_e_ptm = e_pci->pci_gi.vobu_e_ptm; + + (*p_nav_event) = nav_event; + + return nav_len; + case DVDNAV_BLOCK_OK: + if (!state->in_ps) { + if (state->in_pgc) + i = 0; /* necessary in case we are skipping junk cells at the beginning */ + continue; + } + + if (nav_len != DVDVIDEO_BLOCK_SIZE) { + av_log(s, AV_LOG_ERROR, "Invalid MPEG block size (expected=%d actual=%d)\n", + DVDVIDEO_BLOCK_SIZE, nav_len); + + return AVERROR_INVALIDDATA; + } + + if (cur_angle != c->opt_angle) { + av_log(s, AV_LOG_ERROR, "Unexpected angle change (expected=%d new=%d)\n", + c->opt_angle, cur_angle); + + return AVERROR_INPUT_CHANGED; + } + + memcpy(buf, &nav_buf, nav_len); + + /* in case NAV packet is missed */ + state->ptt = cur_ptt; + state->pgn = cur_pgn; + + (*p_nav_event) = nav_event; + + return nav_len; + case DVDNAV_STILL_FRAME: + case DVDNAV_WAIT: + case DVDNAV_HOP_CHANNEL: + case DVDNAV_HIGHLIGHT: + if (state->in_ps) + return AVERROR_EOF; + + if (nav_event == DVDNAV_STILL_FRAME) { + if (dvdnav_still_skip(state->dvdnav) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to skip still image\n"); + + goto end_dvdnav_error; + } + } + + if (nav_event == DVDNAV_WAIT) { + if (dvdnav_wait_skip(state->dvdnav) != DVDNAV_STATUS_OK) { + av_log(s, AV_LOG_ERROR, "Unable to skip WAIT event\n"); + + goto end_dvdnav_error; + } + } + + continue; + case DVDNAV_STOP: + return AVERROR_EOF; + default: + continue; + } + } + + av_log(s, AV_LOG_ERROR, "Unable to find next program stream block\n"); + + return AVERROR_INVALIDDATA; + +end_dvdnav_error: + av_log(s, AV_LOG_ERROR, "dvdnav error (title=%d pgc=%d pg=%d cell=%d): %s\n", + cur_title, cur_pgcn, cur_pgn, state->celln, + dvdnav_err_to_string(state->dvdnav)); + + return AVERROR_EXTERNAL; +} + +static int dvdvideo_pgc_preindex(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + int ret = 0, interrupt = 0; + int nb_chapters = 0, last_ptt = c->opt_chapter_start; + uint64_t cur_chapter_offset = 0, cur_chapter_duration = 0; + DVDVideoPlaybackState state = {0}; + + uint8_t nav_buf[DVDVIDEO_BLOCK_SIZE]; + int nav_event; + + if (c->opt_chapter_start == c->opt_chapter_end) + return ret; + + av_log(s, AV_LOG_INFO, + "Indexing chapter markers, this will take a long time. Please wait...\n"); + + if ((ret = dvdvideo_play_open(s, &state)) < 0 || state.pgc->nr_of_programs == 1) + return ret; + + while (!(interrupt = ff_check_interrupt(&s->interrupt_callback))) { + ret = dvdvideo_play_next_ps_block(s, &state, nav_buf, DVDVIDEO_BLOCK_SIZE, + &nav_event, NULL); + if (ret < 0 && ret != AVERROR_EOF) + goto end_close; + + if (nav_event != DVDNAV_NAV_PACKET && ret != AVERROR_EOF) + continue; + + if (state.ptt == last_ptt) { + cur_chapter_duration += state.vobu_duration; + /* ensure we add the last chapter */ + if (ret != AVERROR_EOF) + continue; + } + + if (!avpriv_new_chapter(s, nb_chapters, DVDVIDEO_TIME_BASE_Q, cur_chapter_offset, + cur_chapter_offset + cur_chapter_duration, NULL)) { + ret = AVERROR(ENOMEM); + goto end_close; + } + + nb_chapters++; + cur_chapter_offset += cur_chapter_duration; + cur_chapter_duration = state.vobu_duration; + last_ptt = state.ptt; + + if (ret == AVERROR_EOF) + break; + } + + if (interrupt) { + ret = AVERROR_EXIT; + goto end_close; + } + + if (ret < 0 && ret != AVERROR_EOF) + goto end_close; + + s->duration = av_rescale_q(state.pgc_elapsed, DVDVIDEO_TIME_BASE_Q, AV_TIME_BASE_Q); + c->duration_ptm = state.pgc_elapsed; + + av_log(s, AV_LOG_INFO, "Chapter marker indexing complete\n"); + ret = 0; + +end_close: + dvdvideo_play_close(s, &state); + + return ret; +} + +static int dvdvideo_pgc_chapters_setup(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + uint64_t time_prev = 0; + int64_t total_duration = 0; + + int chapter_start = c->opt_chapter_start - 1; + int chapter_end = c->opt_chapter_end > 0 ? c->opt_chapter_end : c->play_state.pgc_nb_pg_est - 1; + + if (chapter_start == chapter_end || c->play_state.pgc_nb_pg_est == 1) { + s->duration = av_rescale_q(c->play_state.pgc_duration_est, + DVDVIDEO_TIME_BASE_Q, AV_TIME_BASE_Q); + return 0; + } + + for (int i = chapter_start; i < chapter_end; i++) { + uint64_t time_effective = c->play_state.pgc_pg_times_est[i] - c->play_state.nav_pts; + + if (!avpriv_new_chapter(s, i, DVDVIDEO_TIME_BASE_Q, time_prev, time_effective, NULL)) + return AVERROR(ENOMEM); + + time_prev = time_effective; + total_duration = time_effective; + } + + if (c->opt_chapter_start == 1 && c->opt_chapter_end == 0) + s->duration = av_rescale_q(c->play_state.pgc_duration_est, + DVDVIDEO_TIME_BASE_Q, AV_TIME_BASE_Q); + else + s->duration = av_rescale_q(total_duration, + DVDVIDEO_TIME_BASE_Q, AV_TIME_BASE_Q); + + return 0; +} + +static int dvdvideo_video_stream_analyze(AVFormatContext *s, video_attr_t video_attr, + DVDVideoVTSVideoStreamEntry *entry) +{ + AVRational framerate; + int height = 0; + int width = 0; + int is_pal = video_attr.video_format == 1; + + framerate = is_pal ? (AVRational) { 25, 1 } : (AVRational) { 30000, 1001 }; + height = is_pal ? 576 : 480; + + if (height > 0) { + switch (video_attr.picture_size) { + case 0: /* D1 */ + width = 720; + break; + case 1: /* 4CIF */ + width = 704; + break; + case 2: /* Half D1 */ + width = 352; + break; + case 3: /* CIF */ + width = 352; + height /= 2; + break; + } + } + + if (!width || !height) { + av_log(s, AV_LOG_ERROR, "Invalid video stream parameters in the IFO headers, " + "this could be an authoring error or empty title " + "(video_format=%d picture_size=%d)\n", + video_attr.video_format, video_attr.picture_size); + + return AVERROR_INVALIDDATA; + } + + entry->startcode = 0x1E0; + entry->codec_id = !video_attr.mpeg_version ? AV_CODEC_ID_MPEG1VIDEO : AV_CODEC_ID_MPEG2VIDEO; + entry->width = width; + entry->height = height; + entry->dar = video_attr.display_aspect_ratio ? (AVRational) { 16, 9 } : (AVRational) { 4, 3 }; + entry->framerate = framerate; + entry->has_cc = !is_pal && (video_attr.line21_cc_1 || video_attr.line21_cc_2); + + return 0; +} + +static int dvdvideo_video_stream_add(AVFormatContext *s, + DVDVideoVTSVideoStreamEntry *entry, + enum AVStreamParseType need_parsing) +{ + AVStream *st; + FFStream *sti; + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + st->id = entry->startcode; + st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; + st->codecpar->codec_id = entry->codec_id; + st->codecpar->width = entry->width; + st->codecpar->height = entry->height; + st->codecpar->format = AV_PIX_FMT_YUV420P; + st->codecpar->color_range = AVCOL_RANGE_MPEG; + + st->codecpar->framerate = entry->framerate; +#if FF_API_R_FRAME_RATE + st->r_frame_rate = entry->framerate; +#endif + st->avg_frame_rate = entry->framerate; + + sti = ffstream(st); + sti->request_probe = 0; + sti->need_parsing = need_parsing; + sti->display_aspect_ratio = entry->dar; + sti->avctx->framerate = entry->framerate; + + if (entry->has_cc) + sti->avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS; + + avpriv_set_pts_info(st, DVDVIDEO_PTS_WRAP_BITS, + DVDVIDEO_TIME_BASE_Q.num, DVDVIDEO_TIME_BASE_Q.den); + + return 0; +} + +static int dvdvideo_video_stream_setup(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + int ret = 0; + DVDVideoVTSVideoStreamEntry entry = {0}; + + if ((ret = dvdvideo_video_stream_analyze(s, c->vts_ifo->vtsi_mat->vts_video_attr, &entry)) < 0 || + (ret = dvdvideo_video_stream_add(s, &entry, AVSTREAM_PARSE_HEADERS)) < 0) { + + av_log(s, AV_LOG_ERROR, "Unable to add video stream\n"); + return ret; + } + + return ret; +} + +static int dvdvideo_audio_stream_analyze(AVFormatContext *s, audio_attr_t audio_attr, + uint16_t audio_control, DVDVideoPGCAudioStreamEntry *entry) +{ + int startcode = 0; + enum AVCodecID codec_id = AV_CODEC_ID_NONE; + int sample_fmt = AV_SAMPLE_FMT_NONE; + int sample_rate = 0; + int bit_depth = 0; + int nb_channels = 0; + AVChannelLayout ch_layout = (AVChannelLayout) {0}; + char lang_dvd[3] = {0}; + + int position = (audio_control & 0x7F00) >> 8; + + /* XXX(PATCHWELCOME): SDDS is not supported due to lack of sample material */ + switch (audio_attr.audio_format) { + case 0: /* AC3 */ + codec_id = AV_CODEC_ID_AC3; + sample_fmt = AV_SAMPLE_FMT_FLTP; + sample_rate = 48000; + startcode = 0x80 + position; + break; + case 2: /* MP1 */ + codec_id = AV_CODEC_ID_MP1; + sample_fmt = audio_attr.quantization ? AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16; + sample_rate = 48000; + bit_depth = audio_attr.quantization ? 20 : 16; + startcode = 0x1C0 + position; + break; + case 3: /* MP2 */ + codec_id = AV_CODEC_ID_MP2; + sample_fmt = audio_attr.quantization ? AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16; + sample_rate = 48000; + bit_depth = audio_attr.quantization ? 20 : 16; + startcode = 0x1C0 + position; + break; + case 4: /* DVD PCM */ + codec_id = AV_CODEC_ID_PCM_DVD; + sample_fmt = audio_attr.quantization ? AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16; + sample_rate = audio_attr.sample_frequency ? 96000 : 48000; + bit_depth = audio_attr.quantization == 2 ? 24 : (audio_attr.quantization ? 20 : 16); + startcode = 0xA0 + position; + break; + case 6: /* DCA */ + codec_id = AV_CODEC_ID_DTS; + sample_fmt = AV_SAMPLE_FMT_FLTP; + sample_rate = 48000; + bit_depth = audio_attr.quantization == 2 ? 24 : (audio_attr.quantization ? 20 : 16); + startcode = 0x88 + position; + break; + } + + nb_channels = audio_attr.channels + 1; + + if (codec_id == AV_CODEC_ID_NONE || + startcode == 0 || + sample_fmt == AV_SAMPLE_FMT_NONE || + sample_rate == 0 || + nb_channels == 0) { + + av_log(s, AV_LOG_ERROR, "Invalid audio stream parameters in the IFO headers, " + "this could be an authoring error or dummy title " + "(stream position %d in IFO)\n", position); + return AVERROR_INVALIDDATA; + } + + if (nb_channels == 2) + ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_STEREO; + else if (nb_channels == 6) + ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT1; + else if (nb_channels == 7) + ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_6POINT1; + else if (nb_channels == 8) + ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_7POINT1; + + + if (audio_attr.application_mode == 1) { + entry->disposition |= AV_DISPOSITION_KARAOKE; + + av_log(s, AV_LOG_WARNING, "Extended karaoke metadata is not supported at this time " + "(stream id=%d)\n", startcode); + } + + if (audio_attr.code_extension == 2) + entry->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; + if (audio_attr.code_extension == 3 || audio_attr.code_extension == 4) + entry->disposition |= AV_DISPOSITION_COMMENT; + + AV_WB16(lang_dvd, audio_attr.lang_code); + + entry->startcode = startcode; + entry->codec_id = codec_id; + entry->sample_rate = sample_rate; + entry->bit_depth = bit_depth; + entry->nb_channels = nb_channels; + entry->ch_layout = ch_layout; + entry->lang_iso = ff_convert_lang_to(lang_dvd, AV_LANG_ISO639_2_BIBL); + + return 0; +} + +static int dvdvideo_audio_stream_add(AVFormatContext *s, DVDVideoPGCAudioStreamEntry *entry, + enum AVStreamParseType need_parsing) +{ + AVStream *st; + FFStream *sti; + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + st->id = entry->startcode; + st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; + st->codecpar->codec_id = entry->codec_id; + st->codecpar->format = entry->sample_fmt; + st->codecpar->sample_rate = entry->sample_rate; + st->codecpar->bits_per_coded_sample = entry->bit_depth; + st->codecpar->bits_per_raw_sample = entry->bit_depth; + st->codecpar->ch_layout = entry->ch_layout; + st->codecpar->ch_layout.nb_channels = entry->nb_channels; + st->disposition = entry->disposition; + + if (entry->lang_iso) + av_dict_set(&st->metadata, "language", entry->lang_iso, 0); + + sti = ffstream(st); + sti->request_probe = 0; + sti->need_parsing = need_parsing; + + avpriv_set_pts_info(st, DVDVIDEO_PTS_WRAP_BITS, + DVDVIDEO_TIME_BASE_Q.num, DVDVIDEO_TIME_BASE_Q.den); + + return 0; +} + +static int dvdvideo_audio_stream_add_all(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + int ret = 0; + + for (int i = 0; i < c->vts_ifo->vtsi_mat->nr_of_vts_audio_streams; i++) { + DVDVideoPGCAudioStreamEntry entry = {0}; + + if (!(c->play_state.pgc->audio_control[i] & 0x8000)) + continue; + + if ((ret = dvdvideo_audio_stream_analyze(s, c->vts_ifo->vtsi_mat->vts_audio_attr[i], + c->play_state.pgc->audio_control[i], &entry)) < 0) + goto break_error; + + /* IFO structures can declare duplicate entries for the same startcode */ + for (int j = 0; j < s->nb_streams; j++) + if (s->streams[j]->id == entry.startcode) + continue; + + if ((ret = dvdvideo_audio_stream_add(s, &entry, AVSTREAM_PARSE_HEADERS)) < 0) + goto break_error; + + continue; + +break_error: + av_log(s, AV_LOG_ERROR, "Unable to add audio stream at position %d\n", i); + return ret; + } + + return ret; +} + +static int dvdvideo_subp_stream_analyze(AVFormatContext *s, uint32_t offset, subp_attr_t subp_attr, + DVDVideoPGCSubtitleStreamEntry *entry) +{ + char lang_dvd[3] = {0}; + + entry->startcode = 0x20 + (offset & 0x1F); + + if (subp_attr.lang_extension == 9) + entry->disposition |= AV_DISPOSITION_FORCED; + + AV_WB16(lang_dvd, subp_attr.lang_code); + entry->lang_iso = ff_convert_lang_to(lang_dvd, AV_LANG_ISO639_2_BIBL); + + return 0; +} + +static int dvdvideo_subp_stream_add(AVFormatContext *s, DVDVideoPGCSubtitleStreamEntry *entry, + enum AVStreamParseType need_parsing) +{ + AVStream *st; + FFStream *sti; + int ret = 0; + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + st->id = entry->startcode; + st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE; + st->codecpar->codec_id = AV_CODEC_ID_DVD_SUBTITLE; + + if (entry->lang_iso) + av_dict_set(&st->metadata, "language", entry->lang_iso, 0); + + av_dict_set(&st->metadata, "VIEWPORT", dvdvideo_subp_viewport_labels[entry->viewport], 0); + + st->disposition = entry->disposition; + + sti = ffstream(st); + sti->request_probe = 0; + sti->need_parsing = need_parsing; + + avpriv_set_pts_info(st, DVDVIDEO_PTS_WRAP_BITS, + DVDVIDEO_TIME_BASE_Q.num, DVDVIDEO_TIME_BASE_Q.den); + + return ret; +} + +static int dvdvideo_subp_stream_add_internal(AVFormatContext *s, uint32_t offset, + subp_attr_t subp_attr, + enum DVDVideoSubpictureViewport viewport) +{ + DVDVideoDemuxContext *c = s->priv_data; + + int ret = 0; + DVDVideoPGCSubtitleStreamEntry entry = {0}; + + entry.viewport = viewport; + + if ((ret = dvdvideo_subp_stream_analyze(s, offset, subp_attr, &entry)) < 0) + goto end_error; + + /* IFO structures can declare duplicate entries for the same startcode */ + for (int i = 0; i < s->nb_streams; i++) + if (s->streams[i]->id == entry.startcode) + goto end; + + if ((ret = dvdvideo_subp_stream_add(s, &entry, AVSTREAM_PARSE_HEADERS)) < 0) + goto end_error; + + goto end; + +end_error: + av_log(s, AV_LOG_ERROR, "Unable to add subtitle stream\n"); + +end: + return ret; +} + +static int dvdvideo_subp_stream_add_all(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + if (!c->vts_ifo->vtsi_mat->nr_of_vts_subp_streams) + return 0; + + for (int i = 0; i < c->vts_ifo->vtsi_mat->nr_of_vts_subp_streams; i++) { + int ret = 0; + uint32_t subp_control; + subp_attr_t subp_attr; + video_attr_t video_attr; + + subp_control = c->play_state.pgc->subp_control[i]; + if (!(subp_control & 0x80000000)) + continue; + + /* there can be several presentations for one SPU */ + /* the DAR check is flexible in order to support weird authoring */ + video_attr = c->vts_ifo->vtsi_mat->vts_video_attr; + subp_attr = c->vts_ifo->vtsi_mat->vts_subp_attr[i]; + + /* 4:3 */ + if (!video_attr.display_aspect_ratio) { + if ((ret = dvdvideo_subp_stream_add_internal(s, subp_control >> 24, subp_attr, + DVDVIDEO_SUBP_VIEWPORT_FULLSCREEN)) < 0) + return ret; + + continue; + } + + /* 16:9 */ + if (( ret = dvdvideo_subp_stream_add_internal(s, subp_control >> 16, subp_attr, + DVDVIDEO_SUBP_VIEWPORT_WIDESCREEN)) < 0) + return ret; + + /* 16:9 letterbox */ + if (video_attr.permitted_df == 2 || video_attr.permitted_df == 0) + if ((ret = dvdvideo_subp_stream_add_internal(s, subp_control >> 8, subp_attr, + DVDVIDEO_SUBP_VIEWPORT_LETTERBOX)) < 0) + return ret; + + /* 16:9 pan-and-scan */ + if (video_attr.permitted_df == 1 || video_attr.permitted_df == 0) + if ((ret = dvdvideo_subp_stream_add_internal(s, subp_control, subp_attr, + DVDVIDEO_SUBP_VIEWPORT_PANSCAN)) < 0) + return ret; + } + + return 0; +} + +static void dvdvideo_subdemux_flush(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + if (!c->segment_started) + return; + + av_log(s, AV_LOG_DEBUG, "flushing sub-demuxer\n"); + avio_flush(&c->mpeg_pb.pub); + ff_read_frame_flush(c->mpeg_ctx); + c->segment_started = 0; +} + +static int dvdvideo_subdemux_read_data(void *opaque, uint8_t *buf, int buf_size) +{ + AVFormatContext *s = opaque; + DVDVideoDemuxContext *c = s->priv_data; + + int ret = 0; + int nav_event; + + if (c->play_end) + return AVERROR_EOF; + + ret = dvdvideo_play_next_ps_block(opaque, &c->play_state, buf, buf_size, + &nav_event, dvdvideo_subdemux_flush); + + if (ret == AVERROR_EOF) { + c->mpeg_pb.pub.eof_reached = 1; + c->play_end = 1; + + return AVERROR_EOF; + } + + if (ret >= 0 && nav_event == DVDNAV_NAV_PACKET) + return FFERROR_REDO; + + return ret; +} + +static void dvdvideo_subdemux_close(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + av_freep(&c->mpeg_pb.pub.buffer); + av_freep(&c->mpeg_pb); + avformat_close_input(&c->mpeg_ctx); +} + +static int dvdvideo_subdemux_open(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + int ret = 0; + + if (!(c->mpeg_fmt = av_find_input_format("mpeg"))) + return AVERROR_DEMUXER_NOT_FOUND; + + if (!(c->mpeg_ctx = avformat_alloc_context())) + return AVERROR(ENOMEM); + + if (!(c->mpeg_buf = av_mallocz(DVDVIDEO_BLOCK_SIZE))) { + avformat_free_context(c->mpeg_ctx); + c->mpeg_ctx = NULL; + + return AVERROR(ENOMEM); + } + + ffio_init_context(&c->mpeg_pb, c->mpeg_buf, DVDVIDEO_BLOCK_SIZE, 0, s, + dvdvideo_subdemux_read_data, NULL, NULL); + c->mpeg_pb.pub.seekable = 0; + + if ((ret = ff_copy_whiteblacklists(c->mpeg_ctx, s)) < 0) { + avformat_free_context(c->mpeg_ctx); + c->mpeg_ctx = NULL; + + return ret; + } + + c->mpeg_ctx->flags = AVFMT_FLAG_CUSTOM_IO | AVFMT_FLAG_GENPTS; + c->mpeg_ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE; + c->mpeg_ctx->probesize = 0; + c->mpeg_ctx->max_analyze_duration = 0; + c->mpeg_ctx->interrupt_callback = s->interrupt_callback; + c->mpeg_ctx->pb = &c->mpeg_pb.pub; + c->mpeg_ctx->io_open = NULL; + + return avformat_open_input(&c->mpeg_ctx, "", c->mpeg_fmt, NULL); +} + +static int dvdvideo_read_header(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + int ret = 0; + + if (c->opt_title == 0) { + av_log(s, AV_LOG_INFO, "Defaulting to title #1. " + "This is not always the main feature, validation suggested.\n"); + + c->opt_title = 1; + } + + if (c->opt_pgc) { + if (c->opt_pg == 0) + av_log(s, AV_LOG_ERROR, "Invalid coordinates. If -pgc is set, -pg must be set too.\n"); + else if (c->opt_chapter_start > 1 || c->opt_chapter_end > 0 || c->opt_preindex) + av_log(s, AV_LOG_ERROR, "-pgc is not compatible with the -preindex or " + "-chapter_start/-chapter_end options\n"); + + return AVERROR(EINVAL); + } + + if ((ret = dvdvideo_ifo_open(s)) < 0) + return ret; + + if (c->opt_preindex && (ret = dvdvideo_pgc_preindex(s)) < 0) + return ret; + + if ((ret = dvdvideo_play_open(s, &c->play_state)) < 0 || + (ret = dvdvideo_subdemux_open(s)) < 0 || + (ret = dvdvideo_video_stream_setup(s)) < 0 || + (ret = dvdvideo_audio_stream_add_all(s)) < 0 || + (ret = dvdvideo_subp_stream_add_all(s)) < 0) + return ret; + + if (!c->opt_preindex) + return dvdvideo_pgc_chapters_setup(s); + + return ret; +} + +static int dvdvideo_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + DVDVideoDemuxContext *c = s->priv_data; + + int ret; + enum AVMediaType st_type; + int found_stream = 0; + int64_t cur_delta = 0; + + if (c->play_end) + return AVERROR_EOF; + + ret = av_read_frame(c->mpeg_ctx, pkt); + + if (ret < 0) + return ret; + + if (!c->segment_started) + c->segment_started = 1; + + st_type = c->mpeg_ctx->streams[pkt->stream_index]->codecpar->codec_type; + + /* map the subdemuxer stream to the parent demuxer's stream (by startcode) */ + for (int i = 0; i < s->nb_streams; i++) { + if (s->streams[i]->id == c->mpeg_ctx->streams[pkt->stream_index]->id) { + pkt->stream_index = s->streams[i]->index; + found_stream = 1; + break; + } + } + + if (!found_stream) { + av_log(s, AV_LOG_DEBUG, "discarding frame with stream that was not in IFO headers " + "(stream id=%d)\n", c->mpeg_ctx->streams[pkt->stream_index]->id); + + return FFERROR_REDO; + } + + if (!c->play_started) { + if (st_type != AVMEDIA_TYPE_VIDEO || pkt->pts == AV_NOPTS_VALUE || + pkt->dts == AV_NOPTS_VALUE || + !(pkt->flags & AV_PKT_FLAG_KEY)) { + av_log(s, AV_LOG_VERBOSE, "discarding packet which is not a video keyframe or " + "with unset PTS/DTS at start\n"); + return FFERROR_REDO; + } + + c->first_pts = pkt->pts; + c->play_started = 1; + + pkt->pts = 0; + pkt->dts = c->play_state.ts_offset - pkt->pts; + } else { + cur_delta = c->play_state.ts_offset - c->first_pts; + + if (c->play_state.nb_cells_played == 1 && (pkt->pts == AV_NOPTS_VALUE || + pkt->dts == AV_NOPTS_VALUE || + (pkt->pts + cur_delta) < 0)) { + av_log(s, AV_LOG_VERBOSE, "discarding packet with negative PTS or unset PTS/DTS " + "(this is OK at the start of the first playback cell)\n"); + return FFERROR_REDO; + } + + if (pkt->pts != AV_NOPTS_VALUE) + pkt->pts += cur_delta; + if (pkt->dts != AV_NOPTS_VALUE) + pkt->dts += cur_delta; + } + + av_log(s, AV_LOG_TRACE, "st=%d pts=%ld dts=%ld ts_offset=%ld first_pts=%ld\n", + pkt->stream_index, pkt->pts, pkt->dts, + c->play_state.ts_offset, c->first_pts); + if (pkt->pts < 0) + av_log(s, AV_LOG_WARNING, "Invalid frame PTS @ st=%d pts=%ld dts=%ld\n", + pkt->stream_index, pkt->pts, pkt->dts); + + return c->play_end ? AVERROR_EOF : 0; +} + +static int dvdvideo_close(AVFormatContext *s) +{ + DVDVideoDemuxContext *c = s->priv_data; + + dvdvideo_subdemux_close(s); + dvdvideo_play_close(s, &c->play_state); + dvdvideo_ifo_close(s); + + return 0; +} + +#define OFFSET(x) offsetof(DVDVideoDemuxContext, x) +static const AVOption dvdvideo_options[] = { + {"angle", "playback angle number", OFFSET(opt_angle), AV_OPT_TYPE_INT, { .i64=1 }, 1, 9, AV_OPT_FLAG_DECODING_PARAM }, + {"chapter_end", "exit chapter (PTT) number (0=end)", OFFSET(opt_chapter_end), AV_OPT_TYPE_INT, { .i64=0 }, 0, 99, AV_OPT_FLAG_DECODING_PARAM }, + {"chapter_start", "entry chapter (PTT) number", OFFSET(opt_chapter_start), AV_OPT_TYPE_INT, { .i64=1 }, 1, 99, AV_OPT_FLAG_DECODING_PARAM }, + {"pg", "entry PG number (0=auto)", OFFSET(opt_pg), AV_OPT_TYPE_INT, { .i64=0 }, 0, 255, AV_OPT_FLAG_DECODING_PARAM }, + {"pgc", "entry PGC number (0=auto)", OFFSET(opt_pgc), AV_OPT_TYPE_INT, { .i64=0 }, 0, 999, AV_OPT_FLAG_DECODING_PARAM }, + {"preindex", "enable for accurate chapter markers, slow (2-pass read)", OFFSET(opt_preindex), AV_OPT_TYPE_BOOL, { .i64=0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, + {"region", "playback region number (0=free)", OFFSET(opt_region), AV_OPT_TYPE_INT, { .i64=0 }, 0, 8, AV_OPT_FLAG_DECODING_PARAM }, + {"title", "title number (0=auto)", OFFSET(opt_title), AV_OPT_TYPE_INT, { .i64=0 }, 0, 99, AV_OPT_FLAG_DECODING_PARAM }, + {"trim", "trim padding cells from start", OFFSET(opt_trim), AV_OPT_TYPE_BOOL, { .i64=1 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, + {NULL} +}; + +static const AVClass dvdvideo_class = { + .class_name = "DVD-Video demuxer", + .item_name = av_default_item_name, + .option = dvdvideo_options, + .version = LIBAVUTIL_VERSION_INT +}; + +const AVInputFormat ff_dvdvideo_demuxer = { + .name = "dvdvideo", + .long_name = NULL_IF_CONFIG_SMALL("DVD-Video"), + .priv_class = &dvdvideo_class, + .priv_data_size = sizeof(DVDVideoDemuxContext), + .flags = AVFMT_NOFILE | AVFMT_SHOW_IDS | AVFMT_TS_DISCONT | AVFMT_NO_BYTE_SEEK | AVFMT_NOGENSEARCH | AVFMT_NOBINSEARCH, + .flags_internal = FF_FMT_INIT_CLEANUP, + .read_close = dvdvideo_close, + .read_header = dvdvideo_read_header, + .read_packet = dvdvideo_read_packet +};