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authorwm4 <wm4@nowhere>2013-10-29 21:35:29 +0100
committerwm4 <wm4@nowhere>2013-10-30 01:51:28 +0100
commita84258d769a3d06958a017bb3fc47521ade5751b (patch)
treed502084fdaca4125059364658575fd0795d32c84 /mpvcore/player/timeline/tl_edl.c
parent884b4600a478a1a4b56c53e71dd697ca6773494b (diff)
downloadmpv-a84258d769a3d06958a017bb3fc47521ade5751b.tar.bz2
mpv-a84258d769a3d06958a017bb3fc47521ade5751b.tar.xz
Move files part of the playback core to player sub-directory
All these files access mp_core.h and MPContext, and form the actual player application. They should be all in one place, and separate from the other sources that are mere utility helpers. Preparation for splitting mplayer.c into multiple smaller parts.
Diffstat (limited to 'mpvcore/player/timeline/tl_edl.c')
-rw-r--r--mpvcore/player/timeline/tl_edl.c393
1 files changed, 393 insertions, 0 deletions
diff --git a/mpvcore/player/timeline/tl_edl.c b/mpvcore/player/timeline/tl_edl.c
new file mode 100644
index 0000000000..69e2402149
--- /dev/null
+++ b/mpvcore/player/timeline/tl_edl.c
@@ -0,0 +1,393 @@
+/*
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <inttypes.h>
+#include <ctype.h>
+
+#include "talloc.h"
+
+#include "mpvcore/player/mp_core.h"
+#include "mpvcore/mp_msg.h"
+#include "demux/demux.h"
+#include "mpvcore/path.h"
+#include "mpvcore/bstr.h"
+#include "mpvcore/mp_common.h"
+#include "stream/stream.h"
+
+
+struct edl_source {
+ struct bstr id;
+ char *filename;
+ int lineno;
+};
+
+struct edl_time {
+ int64_t start;
+ int64_t end;
+ bool implied_start;
+ bool implied_end;
+};
+
+struct edl_part {
+ struct edl_time tl;
+ struct edl_time src;
+ int64_t duration;
+ int id;
+ int lineno;
+};
+
+static int find_edl_source(struct edl_source *sources, int num_sources,
+ struct bstr name)
+{
+ for (int i = 0; i < num_sources; i++)
+ if (!bstrcmp(sources[i].id, name))
+ return i;
+ return -1;
+}
+
+void build_edl_timeline(struct MPContext *mpctx)
+{
+ const struct bstr file_prefix = bstr0("<");
+ void *tmpmem = talloc_new(NULL);
+
+ struct bstr *lines = bstr_splitlines(tmpmem, mpctx->demuxer->file_contents);
+ int linec = MP_TALLOC_ELEMS(lines);
+ struct bstr header = bstr0("mplayer EDL file, version ");
+ if (!linec || !bstr_startswith(lines[0], header)) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Bad EDL header!\n");
+ goto out;
+ }
+ struct bstr version = bstr_strip(bstr_cut(lines[0], header.len));
+ if (bstrcmp(bstr0("2"), version)) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Unsupported EDL file version!\n");
+ goto out;
+ }
+ int num_sources = 0;
+ int num_parts = 0;
+ for (int i = 1; i < linec; i++) {
+ if (bstr_startswith(lines[i], file_prefix)) {
+ num_sources++;
+ } else {
+ int comment = bstrchr(lines[i], '#');
+ if (comment >= 0)
+ lines[i] = bstr_splice(lines[i], 0, comment);
+ if (bstr_strip(lines[i]).len)
+ num_parts++;
+ }
+ }
+ if (!num_parts) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "No parts in timeline!\n");
+ goto out;
+ }
+
+ // Parse source filename definitions
+
+ struct edl_source *edl_ids = talloc_array_ptrtype(tmpmem, edl_ids,
+ num_sources);
+ num_sources = 0;
+ for (int i = 1; i < linec; i++) {
+ struct bstr line = lines[i];
+ if (!bstr_startswith(line, file_prefix))
+ continue;
+ line = bstr_cut(line, file_prefix.len);
+ struct bstr id = bstr_split(line, WHITESPACE, &line);
+ if (find_edl_source(edl_ids, num_sources, id) >= 0) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Repeated ID on line %d!\n",
+ i+1);
+ goto out;
+ }
+ if (!isalpha(*id.start)) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Invalid ID on line %d!\n",
+ i+1);
+ goto out;
+ }
+ char *filename = mp_basename(bstrdup0(tmpmem, bstr_strip(line)));
+ if (!strlen(filename)) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR,
+ "EDL: Invalid filename on line %d!\n", i+1);
+ goto out;
+ }
+ struct bstr dirname = mp_dirname(mpctx->demuxer->filename);
+ char *fullname = mp_path_join(tmpmem, dirname, bstr0(filename));
+ edl_ids[num_sources++] = (struct edl_source){id, fullname, i+1};
+ }
+
+ // Parse timeline part definitions
+
+ struct edl_part *parts = talloc_array_ptrtype(tmpmem, parts, num_parts);
+ int total_parts = num_parts;
+ num_parts = 0;
+ for (int i = 1; i < linec; i++) {
+ struct bstr line = bstr_strip(lines[i]);
+ if (!line.len || bstr_startswith(line, file_prefix))
+ continue;
+ parts[num_parts] = (struct edl_part){{-1, -1}, {-1, -1}, 0, -1};
+ parts[num_parts].lineno = i + 1;
+ for (int s = 0; s < 2; s++) {
+ struct edl_time *p = !s ? &parts[num_parts].tl :
+ &parts[num_parts].src;
+ while (1) {
+ struct bstr t = bstr_split(line, WHITESPACE, &line);
+ if (!t.len) {
+ if (!s && num_parts < total_parts - 1) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: missing source "
+ "identifier on line %d (not last)!\n", i+1);
+ goto out;
+ }
+ break;
+ }
+ if (isalpha(*t.start)) {
+ if (s)
+ goto bad;
+ parts[num_parts].id = find_edl_source(edl_ids, num_sources,
+ t);
+ if (parts[num_parts].id < 0) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Undefined source "
+ "identifier on line %d!\n", i+1);
+ goto out;
+ }
+ break;
+ }
+ while (t.len) {
+ struct bstr next;
+ struct bstr arg = bstr_split(t, "+-", &next);
+ if (!arg.len) {
+ next = bstr_split(line, WHITESPACE, &line);
+ arg = bstr_split(next, "+-", &next);
+ }
+ if (!arg.len)
+ goto bad;
+ int64_t val;
+ if (!bstrcmp(arg, bstr0("*")))
+ val = -1;
+ else if (isdigit(*arg.start)) {
+ val = bstrtoll(arg, &arg, 10) * 1000000000;
+ if (arg.len && *arg.start == '.') {
+ int len = arg.len - 1;
+ arg = bstr_splice(arg, 1, 10);
+ int64_t val2 = bstrtoll(arg, &arg, 10);
+ if (arg.len)
+ goto bad;
+ for (; len < 9; len++)
+ val2 *= 10;
+ val += val2;
+ }
+ } else
+ goto bad;
+ int c = *t.start;
+ if (isdigit(c) || c == '*') {
+ if (val < 0)
+ p->implied_start = true;
+ else
+ p->start = val;
+ } else if (c == '-') {
+ if (val < 0)
+ p->implied_end = true;
+ else
+ p->end = val;
+ } else if (c == '+') {
+ if (val < 0)
+ goto bad;
+ if (val == 0) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: zero duration "
+ "on line %d!\n", i+1);
+ goto out;
+ }
+ parts[num_parts].duration = val;
+ } else
+ goto bad;
+ t = next;
+ }
+ }
+ }
+ num_parts++;
+ continue;
+ bad:
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Malformed line %d!\n", i+1);
+ goto out;
+ }
+
+ // Fill in implied start/stop/duration values
+
+ int64_t *times = talloc_zero_array(tmpmem, int64_t, num_sources);
+ while (1) {
+ int64_t time = 0;
+ for (int i = 0; i < num_parts; i++) {
+ for (int s = 0; s < 2; s++) {
+ struct edl_time *p = s ? &parts[i].tl : &parts[i].src;
+ if (!s && parts[i].id == -1)
+ continue;
+ int64_t *t = s ? &time : times + parts[i].id;
+ p->implied_start |= s && *t >= 0;
+ if (p->implied_start && p->start >= 0 && *t >= 0
+ && p->start != *t) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Inconsistent line "
+ "%d!\n", parts[i].lineno);
+ goto out;
+ }
+ if (p->start >= 0)
+ *t = p->start;
+ if (p->implied_start)
+ p->start = *t;
+ if (*t >= 0 && parts[i].duration)
+ *t += parts[i].duration;
+ else
+ *t = -1;
+ if (p->end >= 0)
+ *t = p->end;
+ }
+ }
+ for (int i = 0; i < num_sources; i++)
+ times[i] = -1;
+ time = -1;
+ for (int i = num_parts - 1; i >= 0; i--) {
+ for (int s = 0; s < 2; s++) {
+ struct edl_time *p = s ? &parts[i].tl : &parts[i].src;
+ if (!s && parts[i].id == -1)
+ continue;
+ int64_t *t = s ? &time : times + parts[i].id;
+ p->implied_end |= s && *t >= 0;
+ if (p->implied_end && p->end >= 0 && *t >=0 && p->end != *t) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Inconsistent line "
+ "%d!\n", parts[i].lineno);
+ goto out;
+ }
+ if (p->end >= 0)
+ *t = p->end;
+ if (p->implied_end)
+ p->end = *t;
+ if (*t >= 0 && parts[i].duration) {
+ *t -= parts[i].duration;
+ if (*t < 0) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Negative time "
+ "on line %d!\n", parts[i].lineno);
+ goto out;
+ }
+ } else
+ *t = -1;
+ if (p->start >= 0)
+ *t = p->start;
+ }
+ }
+ int missing_duration = -1;
+ int missing_srcstart = -1;
+ bool anything_done = false;
+ for (int i = 0; i < num_parts; i++) {
+ int64_t duration = parts[i].duration;
+ if (parts[i].tl.start >= 0 && parts[i].tl.end >= 0) {
+ int64_t duration2 = parts[i].tl.end - parts[i].tl.start;
+ if (duration && duration != duration2)
+ goto incons;
+ duration = duration2;
+ if (duration <= 0)
+ goto neg;
+ }
+ if (parts[i].src.start >= 0 && parts[i].src.end >= 0) {
+ int64_t duration2 = parts[i].src.end - parts[i].src.start;
+ if (duration && duration != duration2) {
+ incons:
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Inconsistent line "
+ "%d!\n", i+1);
+ goto out;
+ }
+ duration = duration2;
+ if (duration <= 0) {
+ neg:
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: duration <= 0 on "
+ "line %d!\n", parts[i].lineno);
+ goto out;
+ }
+ }
+ if (parts[i].id == -1)
+ continue;
+ if (!duration)
+ missing_duration = i;
+ else if (!parts[i].duration)
+ anything_done = true;
+ parts[i].duration = duration;
+ if (duration && parts[i].src.start < 0) {
+ if (parts[i].src.end < 0)
+ missing_srcstart = i;
+ else
+ parts[i].src.start = parts[i].src.end - duration;
+ }
+ }
+ if (!anything_done) {
+ if (missing_duration >= 0) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Could not determine "
+ "duration for line %d!\n",
+ parts[missing_duration].lineno);
+ goto out;
+ }
+ if (missing_srcstart >= 0) {
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: no source start time for "
+ "line %d!\n", parts[missing_srcstart].lineno);
+ goto out;
+ }
+ break;
+ }
+ }
+
+ // Open source files
+
+ struct demuxer **sources = talloc_array_ptrtype(NULL, sources,
+ num_sources + 1);
+ talloc_free(mpctx->sources);
+ mpctx->sources = sources;
+ sources[0] = mpctx->demuxer;
+ mpctx->num_sources = 1;
+
+ for (int i = 0; i < num_sources; i++) {
+ struct stream *s = stream_open(edl_ids[i].filename, mpctx->opts);
+ if (!s)
+ goto openfail;
+ struct demuxer *d = demux_open(s, NULL, NULL, mpctx->opts);
+ if (!d) {
+ free_stream(s);
+ openfail:
+ mp_msg(MSGT_CPLAYER, MSGL_ERR, "EDL: Could not open source "
+ "file on line %d!\n", edl_ids[i].lineno);
+ goto out;
+ }
+ sources[mpctx->num_sources] = d;
+ mpctx->num_sources++;
+ }
+
+ // Write final timeline structure
+
+ struct timeline_part *timeline = talloc_array_ptrtype(NULL, timeline,
+ num_parts + 1);
+ int64_t starttime = 0;
+ for (int i = 0; i < num_parts; i++) {
+ timeline[i].start = starttime / 1e9;
+ starttime += parts[i].duration;
+ timeline[i].source_start = parts[i].src.start / 1e9;
+ timeline[i].source = sources[parts[i].id + 1];
+ }
+ if (parts[num_parts - 1].id != -1) {
+ timeline[num_parts].start = starttime / 1e9;
+ num_parts++;
+ }
+ mpctx->timeline = timeline;
+ mpctx->num_timeline_parts = num_parts - 1;
+
+ out:
+ talloc_free(tmpmem);
+}