[FFmpeg-devel] [PATCH v11 1/2] libavformat: add DVD-Video demuxer, powered by libdvdnav and libdvdread
Marth64
marth64 at proxyid.net
Fri Feb 9 21:30:35 EET 2024
Addresses the last round of feedback.
Fingers crossed.
- Resolves maintainability concern
- Some more formatting nits
- Removes the YUV-RGB lookup table
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 | 1422 +++++++++++++++++++++++++++++++++++++
6 files changed, 1564 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..f389afedb6
--- /dev/null
+++ b/libavformat/dvdvideodec.c
@@ -0,0 +1,1422 @@
+/*
+ * 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(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;
+
+ /* map the subdemuxer stream to the parent subdemuxer's stream (by startcode) */
+ st_type = c->mpeg_ctx->streams[pkt->stream_index]->codecpar->codec_type;
+ 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
+};
--
2.34.1
More information about the ffmpeg-devel
mailing list