c08455d6 by Gary Katsevman

Calculate currentTime after seeks discontinuities taking into account.

Add a new duration method that accepts a start and end index.
Add "use strict" to the top of the scope for strict mode goodness.
1 parent e300021d
...@@ -7,6 +7,7 @@ ...@@ -7,6 +7,7 @@
7 */ 7 */
8 8
9 (function(window, videojs, document, undefined) { 9 (function(window, videojs, document, undefined) {
10 'use strict';
10 11
11 var 12 var
12 13
...@@ -145,22 +146,42 @@ var ...@@ -145,22 +146,42 @@ var
145 }, 146 },
146 147
147 /** 148 /**
148 * Calculate the total duration for a playlist based on segment metadata. 149 * Calculate the duration of a playlist from a given start index to a given
150 * end index.
149 * @param playlist {object} a media playlist object 151 * @param playlist {object} a media playlist object
150 * @return {number} the currently known duration, in seconds 152 * @param startIndex {number} an inclusive lower boundary for the playlist.
153 * Defaults to 0.
154 * @param endIndex {number} an exclusive upper boundary for the playlist.
155 * Defaults to playlist length.
156 * @return {number} the duration between the start index and end index.
151 */ 157 */
152 totalDuration = function(playlist) { 158 duration = function(playlist, startIndex, endIndex) {
153 var 159 var dur = 0,
154 duration = 0,
155 segment, 160 segment,
156 i; 161 i;
157 162
163 startIndex = startIndex || 0;
164 endIndex = endIndex || (playlist.segments || []).length;
165 i = endIndex - 1;
166
167 for (; i >= startIndex; i--) {
168 segment = playlist.segments[i];
169 dur += segment.duration || playlist.targetDuration || 0;
170 }
171
172 return dur;
173 },
174
175 /**
176 * Calculate the total duration for a playlist based on segment metadata.
177 * @param playlist {object} a media playlist object
178 * @return {number} the currently known duration, in seconds
179 */
180 totalDuration = function(playlist) {
158 if (!playlist) { 181 if (!playlist) {
159 return 0; 182 return 0;
160 } 183 }
161 184
162 i = (playlist.segments || []).length;
163
164 // if present, use the duration specified in the playlist 185 // if present, use the duration specified in the playlist
165 if (playlist.totalDuration) { 186 if (playlist.totalDuration) {
166 return playlist.totalDuration; 187 return playlist.totalDuration;
...@@ -171,11 +192,7 @@ var ...@@ -171,11 +192,7 @@ var
171 return window.Infinity; 192 return window.Infinity;
172 } 193 }
173 194
174 while (i--) { 195 return duration(playlist);
175 segment = playlist.segments[i];
176 duration += segment.duration || playlist.targetDuration || 0;
177 }
178 return duration;
179 }, 196 },
180 197
181 resolveUrl, 198 resolveUrl,
...@@ -197,6 +214,7 @@ var ...@@ -197,6 +214,7 @@ var
197 } 214 }
198 return this.el().vjs_getProperty('currentTime'); 215 return this.el().vjs_getProperty('currentTime');
199 }; 216 };
217
200 player.hls.setCurrentTime = function(currentTime) { 218 player.hls.setCurrentTime = function(currentTime) {
201 if (!(this.playlists && this.playlists.media())) { 219 if (!(this.playlists && this.playlists.media())) {
202 // return immediately if the metadata is not ready yet 220 // return immediately if the metadata is not ready yet
...@@ -404,16 +422,23 @@ var ...@@ -404,16 +422,23 @@ var
404 // playback time 422 // playback time
405 if (typeof offset === 'number') { 423 if (typeof offset === 'number') {
406 (function() { 424 (function() {
407 var tag = segmentParser.getTags()[0]; 425 var tag = segmentParser.getTags()[0],
426 ptsnaught = tag.pts,
427 ptsdelta,
428 playlist = player.hls.playlists.media(),
429 segmentOffset,
430 ptsTime;
408 431
409 for (; tag && tag.pts < offset; tag = segmentParser.getTags()[0]) { 432 segmentOffset = duration(playlist, 0, player.hls.mediaIndex) * 1000;
433
434 ptsTime = offset - segmentOffset + ptsnaught;
435
436 for (; tag && tag.pts < ptsTime; tag = segmentParser.getTags()[0]) {
410 segmentParser.getNextTag(); 437 segmentParser.getNextTag();
411 } 438 }
412 439
413 // tell the SWF where we will be seeking to 440 // tell the SWF where we will be seeking to
414 if (tag) { 441 player.hls.el().vjs_setProperty('currentTime', (tag.pts - ptsnaught + segmentOffset) * 0.001);
415 player.hls.el().vjs_setProperty('currentTime', tag.pts * 0.001);
416 }
417 442
418 lastSeekedTime = null; 443 lastSeekedTime = null;
419 })(); 444 })();
......