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oggdemux: use index to estimate bitrate
When we have an index, use it to much more accurately estimate the total stream bitrate.
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18f07f03d1
commit
549bc3c80e
3 changed files with 28 additions and 3 deletions
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@ -1677,11 +1677,11 @@ gst_ogg_demux_activate_chain (GstOggDemux * ogg, GstOggChain * chain,
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/* FIXME, should not be called with NULL */
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/* FIXME, should not be called with NULL */
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if (chain != NULL) {
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if (chain != NULL) {
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gint bitrate;
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gint bitrate, idx_bitrate;
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GST_DEBUG_OBJECT (ogg, "activating chain %p", chain);
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GST_DEBUG_OBJECT (ogg, "activating chain %p", chain);
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bitrate = 0;
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bitrate = idx_bitrate = 0;
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/* first add the pads */
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/* first add the pads */
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for (i = 0; i < chain->streams->len; i++) {
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for (i = 0; i < chain->streams->len; i++) {
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@ -1690,6 +1690,9 @@ gst_ogg_demux_activate_chain (GstOggDemux * ogg, GstOggChain * chain,
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pad = g_array_index (chain->streams, GstOggPad *, i);
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pad = g_array_index (chain->streams, GstOggPad *, i);
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if (pad->map.idx_bitrate)
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idx_bitrate = MAX (idx_bitrate, pad->map.idx_bitrate);
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bitrate += pad->map.bitrate;
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bitrate += pad->map.bitrate;
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/* mark discont */
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/* mark discont */
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@ -1714,7 +1717,8 @@ gst_ogg_demux_activate_chain (GstOggDemux * ogg, GstOggChain * chain,
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gst_element_add_pad (GST_ELEMENT (ogg), GST_PAD_CAST (pad));
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gst_element_add_pad (GST_ELEMENT (ogg), GST_PAD_CAST (pad));
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pad->added = TRUE;
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pad->added = TRUE;
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}
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}
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ogg->bitrate = bitrate;
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/* prefer the index bitrate over the ones encoded in the streams */
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ogg->bitrate = (idx_bitrate ? idx_bitrate : bitrate);
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}
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}
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/* after adding the new pads, remove the old pads */
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/* after adding the new pads, remove the old pads */
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@ -922,6 +922,26 @@ gst_ogg_map_add_index (GstOggStream * pad, const guint8 * data, guint size)
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G_GUINT64_FORMAT, n_keypoints, isize);
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G_GUINT64_FORMAT, n_keypoints, isize);
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}
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}
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pad->n_index = isize;
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pad->n_index = isize;
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/* try to use the index to estimate the bitrate */
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if (isize > 2) {
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guint64 so, eo, st, et, b, t;
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/* get start and end offset and timestamps */
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so = pad->index[0].offset;
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st = pad->index[0].timestamp;
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eo = pad->index[isize - 1].offset;
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et = pad->index[isize - 1].timestamp;
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b = eo - so;
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t = et - st;
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GST_DEBUG ("bytes/time %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, b, t);
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/* this is the total stream bitrate according to this index */
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pad->idx_bitrate = gst_util_uint64_scale (8 * b, pad->kp_denom, t);
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GST_DEBUG ("bitrate %" G_GUINT64_FORMAT, pad->idx_bitrate);
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}
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return TRUE;
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return TRUE;
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}
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}
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@ -89,6 +89,7 @@ struct _GstOggStream
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guint n_index;
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guint n_index;
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GstOggIndex *index;
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GstOggIndex *index;
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guint64 kp_denom;
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guint64 kp_denom;
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guint64 idx_bitrate;
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};
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};
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