[FFmpeg-devel] [PATCH v9 1/2] libavformat: add dvdvideo demuxer, powered by libdvdnav and libdvdread
Marth64
marth64 at proxyid.net
Fri Feb 9 09:24:40 EET 2024
Please ignore, see v10.
On Fri, Feb 9, 2024 at 1:17 AM Marth64 <marth64 at proxyid.net> wrote:
> Thank you to all the reviewers for your time.
>
> [Remaining Questions]
>
> Andreas R:
> > This makes this code add an AVStream to the child AVFormatContext. This
> > is not how it is supposed to be. You may not add AVStreams behind an
> > input AVFormatContext's back.
> The intent here is that I need to tell the subdemuxer which streams to
> expect,
> hence why I don't call find_stream_info() on it or let it probe on it's
> own.
> The DVD IFO headers give me all of the information in advance.
> This is required AFAIK because there might be forced subtitle tracks that
> do not
> start until mid-playback. After further discussion with reviewer,
> it appears the concern is more about long term maintainability:
> > Some (de)muxers (i.e. the avi demuxer) use AVStream.priv_data to store
> some per-stream data.
> > They allocate this immediately after having added the stream.
> > Imagine someone changing the mpegps demuxer in this way.
> > Then it would crash when it tried to access the stream's private data
> > in case the stream has been added by an outside demuxer."
> I respect this feedback, makes sense. I'm not sure if this is a show
> stopper or not
> but thought to take the community's overall opinion on a solution (if any)?
>
> > Given that this code here is absolutely not speed relevant, the LUT
> > can be avoided by using av_clip_uint8(value - 1024). [Andreas R.]
> I had a hard time trying to make this work with YUV_TO_RGB2_CCIR() which
> seems to expect the LUT. Happy to remove it if possible, just a little
> stuck on this.
> Thank you.
>
> [Addressed]
>
> - Documentation fixes
> - Robust logging messages (also printing explicit error reason from dvdnav)
> - Structure fixes (using const, etc.)
> - Condensed libdvdnav/libdvdread logging callbacks
> - Moved some variables to the stack (and removed unchecked allocations,
> tired eyes, thx)
> - Formatting compliance (best effort, please let me know if further needed
> - thx)
>
> [Addressed, with response]
>
> Stefano S:
> > unrelated, but it might be useful to have a -list-titles option
> Agreed :-) This feature is still a work in progress as it is not a
> straightforward job
> and there are good alternative tools, so I had to deprioritize (currently
> in tinkering phase).
> Hopefully this is fair, thanks.
>
> Andreas R:
> > What is this header used for?
> avcodec.c - used to access avctx and set FF_CODEC_PROPERTY_CLOSED_CAPTIONS
> Intent was to declare availability of EIA608 CC, as this is known at the
> container level.
>
> url.h - used for ff_check_interrupt() - This is in my assumption to ensure
> a
> safe cancellation path while using the "preindex" option, which requires
> a full read of the disc to determine correct chapter markers.
>
> > Why not? We have AV_DISPOSITION_KARAOKE.
> Thanks - added the disposition and also cleared up the point of the
> message,
> which is to say that karaoke tracks have additional extension metadata
> located in the IFO headers. I have not studied how to parse it at this
> time.
>
> Signed-off-by: Marth64 <marth64 at proxyid.net>
> ---
> Changelog | 2 +
> configure | 8 +
> doc/demuxers.texi | 130 ++++
> libavformat/Makefile | 1 +
> libavformat/allformats.c | 1 +
> libavformat/dvdvideodec.c | 1419 +++++++++++++++++++++++++++++++++++++
> 6 files changed, 1561 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 <next>:
> - ffmpeg CLI options may now be used as -/opt <path>, which is equivalent
> to -opt <contents of file <path>>
> - 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
>
> + at 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.
> +
> + at 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:
> + at url{
> https://code.videolan.org/videolan/libdvdnav/-/blob/master/doc/dvd_structures
> }
> +
> + at subsection Options
> +
> +This demuxer accepts the following options:
> +
> + at table @option
> +
> + at 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.
> +
> + at item chapter_start @var{int}
> +The chapter, or PTT (part-of-title), number to start at. Default is 1.
> +
> + at 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.
> +
> + at 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.
> +
> + at 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".
> +
> + at 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}.
> +
> + at 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}.
> +
> + at 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.
> +
> + at 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.
> +
> + at end table
> +
> + at subsection Examples
> +
> + at itemize
> + at item
> +Open title 3 from a given DVD structure:
> + at example
> +ffmpeg -f dvdvideo -title 3 -i <path to DVD> ...
> + at end example
> +
> + at item
> +Open chapters 3-6 from title 1 from a given DVD structure:
> + at example
> +ffmpeg -f dvdvideo -chapter_start 3 -chapter_end 6 -title 1 -i <path to
> DVD> ...
> + at end example
> +
> + at item
> +Open only chapter 5 from title 1 from a given DVD structure:
> + at example
> +ffmpeg -f dvdvideo -chapter_start 5 -chapter_end 5 -title 1 -i <path to
> DVD> ...
> + at end example
> + at 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..c8628609c9
> --- /dev/null
> +++ b/libavformat/dvdvideodec.c
> @@ -0,0 +1,1419 @@
> +/*
> + * 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 <dvdnav/dvdnav.h>
> +#include <dvdread/dvd_reader.h>
> +#include <dvdread/ifo_read.h>
> +#include <dvdread/ifo_types.h>
> +#include <dvdread/nav_read.h>
> +
> +#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(c->mpeg_ctx, &entry,
> AVSTREAM_PARSE_FULL)) < 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(c->mpeg_ctx, &entry,
> AVSTREAM_PARSE_FULL)) < 0 ||
> + (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(c->mpeg_ctx, &entry,
> AVSTREAM_PARSE_FULL)) < 0 ||
> + (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;
> +
> + if ((ret = avformat_open_input(&c->mpeg_ctx, "", c->mpeg_fmt, NULL))
> < 0)
> + c->mpeg_ctx = NULL;
> +
> + return ret;
> +}
> +
> +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;
> + 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;
> +
> + if (pkt->stream_index >= s->nb_streams) {
> + av_log(s, AV_LOG_DEBUG, "discarding frame with stream that was
> not in IFO headers "
> + "(index=%d)\n", pkt->stream_index);
> +
> + return FFERROR_REDO;
> + }
> +
> + st_type =
> c->mpeg_ctx->streams[pkt->stream_index]->codecpar->codec_type;
> +
> + 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
> +};
> --
> 2.34.1
>
>
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