Adding upstream version 0.37.0.upstream/0.37.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 360 insertions, 0 deletions

diff --git a/demux/demux_disc.c b/demux/demux_disc.c
new file mode 100644
index 0000000..3dfff45
--- /dev/null
+++ b/demux/demux_disc.c
@@ -0,0 +1,360 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv 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.
+ *
+ * mpv 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 mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+
+#include "common/common.h"
+#include "common/msg.h"
+
+#include "stream/stream.h"
+#include "video/mp_image.h"
+#include "demux.h"
+#include "stheader.h"
+
+#include "video/csputils.h"
+
+struct priv {
+    struct demuxer *slave;
+    // streams[slave_stream_index] == our_stream
+    struct sh_stream **streams;
+    int num_streams;
+    // This contains each DVD sub stream, or NULL. Needed because DVD packets
+    // can come arbitrarily late in the MPEG stream, so the slave demuxer
+    // might add the streams only later.
+    struct sh_stream *dvd_subs[32];
+    // Used to rewrite the raw MPEG timestamps to playback time.
+    double base_time;   // playback display start time of current segment
+    double base_dts;    // packet DTS that maps to base_time
+    double last_dts;    // DTS of previously demuxed packet
+    bool seek_reinit;   // needs reinit after seek
+
+    bool is_dvd, is_cdda;
+};
+
+// If the timestamp difference between subsequent packets is this big, assume
+// a reset. It should be big enough to account for 1. low video framerates and
+// large audio frames, and 2. bad interleaving.
+#define DTS_RESET_THRESHOLD 5.0
+
+static void reselect_streams(demuxer_t *demuxer)
+{
+    struct priv *p = demuxer->priv;
+    int num_slave = demux_get_num_stream(p->slave);
+    for (int n = 0; n < MPMIN(num_slave, p->num_streams); n++) {
+        if (p->streams[n]) {
+            demuxer_select_track(p->slave, demux_get_stream(p->slave, n),
+                MP_NOPTS_VALUE, demux_stream_is_selected(p->streams[n]));
+        }
+    }
+}
+
+static void get_disc_lang(struct stream *stream, struct sh_stream *sh, bool dvd)
+{
+    struct stream_lang_req req = {.type = sh->type, .id = sh->demuxer_id};
+    if (dvd && sh->type == STREAM_SUB)
+        req.id = req.id & 0x1F; // mpeg ID to index
+    stream_control(stream, STREAM_CTRL_GET_LANG, &req);
+    if (req.name[0])
+        sh->lang = talloc_strdup(sh, req.name);
+}
+
+static void add_dvd_streams(demuxer_t *demuxer)
+{
+    struct priv *p = demuxer->priv;
+    struct stream *stream = demuxer->stream;
+    if (!p->is_dvd)
+        return;
+    struct stream_dvd_info_req info;
+    if (stream_control(stream, STREAM_CTRL_GET_DVD_INFO, &info) > 0) {
+        for (int n = 0; n < MPMIN(32, info.num_subs); n++) {
+            struct sh_stream *sh = demux_alloc_sh_stream(STREAM_SUB);
+            sh->demuxer_id = n + 0x20;
+            sh->codec->codec = "dvd_subtitle";
+            get_disc_lang(stream, sh, true);
+            // p->streams _must_ match with p->slave->streams, so we can't add
+            // it yet - it has to be done when the real stream appears, which
+            // could be right on start, or any time later.
+            p->dvd_subs[n] = sh;
+
+            // emulate the extradata
+            struct mp_csp_params csp = MP_CSP_PARAMS_DEFAULTS;
+            struct mp_cmat cmatrix;
+            mp_get_csp_matrix(&csp, &cmatrix);
+
+            char *s = talloc_strdup(sh, "");
+            s = talloc_asprintf_append(s, "palette: ");
+            for (int i = 0; i < 16; i++) {
+                int color = info.palette[i];
+                int y[3] = {(color >> 16) & 0xff, (color >> 8) & 0xff, color & 0xff};
+                int c[3];
+                mp_map_fixp_color(&cmatrix, 8, y, 8, c);
+                color = (c[2] << 16) | (c[1] << 8) | c[0];
+
+                if (i != 0)
+                    s = talloc_asprintf_append(s, ", ");
+                s = talloc_asprintf_append(s, "%06x", color);
+            }
+            s = talloc_asprintf_append(s, "\n");
+
+            sh->codec->extradata = s;
+            sh->codec->extradata_size = strlen(s);
+
+            demux_add_sh_stream(demuxer, sh);
+        }
+    }
+}
+
+static void add_streams(demuxer_t *demuxer)
+{
+    struct priv *p = demuxer->priv;
+
+    for (int n = p->num_streams; n < demux_get_num_stream(p->slave); n++) {
+        struct sh_stream *src = demux_get_stream(p->slave, n);
+        if (src->type == STREAM_SUB) {
+            struct sh_stream *sub = NULL;
+            if (src->demuxer_id >= 0x20 && src->demuxer_id <= 0x3F)
+                sub = p->dvd_subs[src->demuxer_id - 0x20];
+            if (sub) {
+                assert(p->num_streams == n); // directly mapped
+                MP_TARRAY_APPEND(p, p->streams, p->num_streams, sub);
+                continue;
+            }
+        }
+        struct sh_stream *sh = demux_alloc_sh_stream(src->type);
+        assert(p->num_streams == n); // directly mapped
+        MP_TARRAY_APPEND(p, p->streams, p->num_streams, sh);
+        // Copy all stream fields that might be relevant
+        *sh->codec = *src->codec;
+        sh->demuxer_id = src->demuxer_id;
+        if (src->type == STREAM_VIDEO) {
+            double ar;
+            if (stream_control(demuxer->stream, STREAM_CTRL_GET_ASPECT_RATIO, &ar)
+                                == STREAM_OK)
+            {
+                struct mp_image_params f = {.w = src->codec->disp_w,
+                                            .h = src->codec->disp_h};
+                mp_image_params_set_dsize(&f, 1728 * ar, 1728);
+                sh->codec->par_w = f.p_w;
+                sh->codec->par_h = f.p_h;
+            }
+        }
+        get_disc_lang(demuxer->stream, sh, p->is_dvd);
+        demux_add_sh_stream(demuxer, sh);
+    }
+    reselect_streams(demuxer);
+}
+
+static void d_seek(demuxer_t *demuxer, double seek_pts, int flags)
+{
+    struct priv *p = demuxer->priv;
+
+    if (p->is_cdda) {
+        demux_seek(p->slave, seek_pts, flags);
+        return;
+    }
+
+    if (flags & SEEK_FACTOR) {
+        double tmp = 0;
+        stream_control(demuxer->stream, STREAM_CTRL_GET_TIME_LENGTH, &tmp);
+        seek_pts *= tmp;
+    }
+
+    MP_VERBOSE(demuxer, "seek to: %f\n", seek_pts);
+
+    // Supposed to induce a seek reset. Does it even work? I don't know.
+    // It will log some bogus error messages, since the demuxer will try a
+    // low level seek, which will obviously not work. But it will probably
+    // clear its internal buffers.
+    demux_seek(p->slave, 0, SEEK_FACTOR | SEEK_FORCE);
+    stream_drop_buffers(demuxer->stream);
+
+    double seek_arg[] = {seek_pts, flags};
+    stream_control(demuxer->stream, STREAM_CTRL_SEEK_TO_TIME, seek_arg);
+
+    p->seek_reinit = true;
+}
+
+static void reset_pts(demuxer_t *demuxer)
+{
+    struct priv *p = demuxer->priv;
+
+    double base;
+    if (stream_control(demuxer->stream, STREAM_CTRL_GET_CURRENT_TIME, &base) < 1)
+        base = 0;
+
+    MP_VERBOSE(demuxer, "reset to time: %f\n", base);
+
+    p->base_dts = p->last_dts = MP_NOPTS_VALUE;
+    p->base_time = base;
+    p->seek_reinit = false;
+}
+
+static bool d_read_packet(struct demuxer *demuxer, struct demux_packet **out_pkt)
+{
+    struct priv *p = demuxer->priv;
+
+    struct demux_packet *pkt = demux_read_any_packet(p->slave);
+    if (!pkt)
+        return false;
+
+    demux_update(p->slave, MP_NOPTS_VALUE);
+
+    if (p->seek_reinit)
+        reset_pts(demuxer);
+
+    add_streams(demuxer);
+    if (pkt->stream >= p->num_streams) { // out of memory?
+        talloc_free(pkt);
+        return true;
+    }
+
+    struct sh_stream *sh = p->streams[pkt->stream];
+    if (!demux_stream_is_selected(sh)) {
+        talloc_free(pkt);
+        return true;
+    }
+
+    pkt->stream = sh->index;
+
+    if (p->is_cdda) {
+        *out_pkt = pkt;
+        return true;
+    }
+
+    MP_TRACE(demuxer, "ipts: %d %f %f\n", sh->type, pkt->pts, pkt->dts);
+
+    if (sh->type == STREAM_SUB) {
+        if (p->base_dts == MP_NOPTS_VALUE)
+            MP_WARN(demuxer, "subtitle packet along PTS reset\n");
+    } else if (pkt->dts != MP_NOPTS_VALUE) {
+        // Use the very first DTS to rebase the start time of the MPEG stream
+        // to the playback time.
+        if (p->base_dts == MP_NOPTS_VALUE)
+            p->base_dts = pkt->dts;
+
+        if (p->last_dts == MP_NOPTS_VALUE)
+            p->last_dts = pkt->dts;
+
+        if (fabs(p->last_dts - pkt->dts) >= DTS_RESET_THRESHOLD) {
+            MP_WARN(demuxer, "PTS discontinuity: %f->%f\n", p->last_dts, pkt->dts);
+            p->base_time += p->last_dts - p->base_dts;
+            p->base_dts = pkt->dts - pkt->duration;
+        }
+        p->last_dts = pkt->dts;
+    }
+
+    if (p->base_dts != MP_NOPTS_VALUE) {
+        double delta = -p->base_dts + p->base_time;
+        if (pkt->pts != MP_NOPTS_VALUE)
+            pkt->pts += delta;
+        if (pkt->dts != MP_NOPTS_VALUE)
+            pkt->dts += delta;
+    }
+
+    MP_TRACE(demuxer, "opts: %d %f %f\n", sh->type, pkt->pts, pkt->dts);
+
+    *out_pkt = pkt;
+    return 1;
+}
+
+static void add_stream_chapters(struct demuxer *demuxer)
+{
+    int num = 0;
+    if (stream_control(demuxer->stream, STREAM_CTRL_GET_NUM_CHAPTERS, &num) < 1)
+        return;
+    for (int n = 0; n < num; n++) {
+        double p = n;
+        if (stream_control(demuxer->stream, STREAM_CTRL_GET_CHAPTER_TIME, &p) < 1)
+            continue;
+        demuxer_add_chapter(demuxer, "", p, 0);
+    }
+}
+
+static int d_open(demuxer_t *demuxer, enum demux_check check)
+{
+    struct priv *p = demuxer->priv = talloc_zero(demuxer, struct priv);
+
+    if (check != DEMUX_CHECK_FORCE)
+        return -1;
+
+    struct demuxer_params params = {
+        .force_format = "+lavf",
+        .external_stream = demuxer->stream,
+        .stream_flags = demuxer->stream_origin,
+    };
+
+    struct stream *cur = demuxer->stream;
+    const char *sname = "";
+    if (cur->info)
+        sname = cur->info->name;
+
+    p->is_cdda = strcmp(sname, "cdda") == 0;
+    p->is_dvd = strcmp(sname, "dvd") == 0 ||
+                strcmp(sname, "ifo") == 0 ||
+                strcmp(sname, "dvdnav") == 0 ||
+                strcmp(sname, "ifo_dvdnav") == 0;
+
+    if (p->is_cdda)
+        params.force_format = "+rawaudio";
+
+    char *t = NULL;
+    stream_control(demuxer->stream, STREAM_CTRL_GET_DISC_NAME, &t);
+    if (t) {
+        mp_tags_set_str(demuxer->metadata, "TITLE", t);
+        talloc_free(t);
+    }
+
+    // Initialize the playback time. We need to read _some_ data to get the
+    // correct stream-layer time (at least with libdvdnav).
+    stream_read_peek(demuxer->stream, &(char){0}, 1);
+    reset_pts(demuxer);
+
+    p->slave = demux_open_url("-", &params, demuxer->cancel, demuxer->global);
+    if (!p->slave)
+        return -1;
+
+    // Can be seekable even if the stream isn't.
+    demuxer->seekable = true;
+
+    add_dvd_streams(demuxer);
+    add_streams(demuxer);
+    add_stream_chapters(demuxer);
+
+    double len;
+    if (stream_control(demuxer->stream, STREAM_CTRL_GET_TIME_LENGTH, &len) >= 1)
+        demuxer->duration = len;
+
+    return 0;
+}
+
+static void d_close(demuxer_t *demuxer)
+{
+    struct priv *p = demuxer->priv;
+    demux_free(p->slave);
+}
+
+const demuxer_desc_t demuxer_desc_disc = {
+    .name = "disc",
+    .desc = "CD/DVD/BD wrapper",
+    .read_packet = d_read_packet,
+    .open = d_open,
+    .close = d_close,
+    .seek = d_seek,
+    .switched_tracks = reselect_streams,
+};