From ca4d051ceafb77c281583c4e50b391f230544313 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Mon, 5 Nov 2012 10:36:55 +0000
Subject: Move trimming into the encoder; seems to be cleaner.

---
 src/lib/encoder.cc | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

(limited to 'src/lib/encoder.cc')

diff --git a/src/lib/encoder.cc b/src/lib/encoder.cc
index bb23c9e59..b322be04c 100644
--- a/src/lib/encoder.cc
+++ b/src/lib/encoder.cc
@@ -23,7 +23,9 @@
 
 #include "encoder.h"
 #include "util.h"
+#include "options.h"
 
+using std::pair;
 using namespace boost;
 
 int const Encoder::_history_size = 25;
@@ -101,3 +103,51 @@ Encoder::frame_skipped ()
 	boost::mutex::scoped_lock lock (_history_mutex);
 	_just_skipped = true;
 }
+
+void
+Encoder::process_video (shared_ptr<const Image> i, SourceFrame f, boost::shared_ptr<Subtitle> s)
+{
+	if (_opt->decode_video_skip != 0 && (f % _opt->decode_video_skip) != 0) {
+		return;
+	}
+
+	if (_opt->video_decode_range) {
+		pair<SourceFrame, SourceFrame> const r = _opt->video_decode_range.get();
+		if (f < r.first || f >= r.second) {
+			return;
+		}
+	}
+
+	do_process_video (i, f, s);
+}
+
+void
+Encoder::process_audio (shared_ptr<const AudioBuffers> data, int64_t f)
+{
+	if (_opt->audio_decode_range) {
+
+		shared_ptr<AudioBuffers> trimmed (new AudioBuffers (*data.get ()));
+		
+		/* Range that we are encoding */
+		pair<int64_t, int64_t> required_range = _opt->audio_decode_range.get();
+		/* Range of this block of data */
+		pair<int64_t, int64_t> this_range (f, f + trimmed->frames());
+
+		if (this_range.second < required_range.first || required_range.second < this_range.first) {
+			/* No part of this audio is within the required range */
+			return;
+		} else if (required_range.first >= this_range.first && required_range.first < this_range.second) {
+			/* Trim start */
+			int64_t const shift = required_range.first - this_range.first;
+			trimmed->move (shift, 0, trimmed->frames() - shift);
+			trimmed->set_frames (trimmed->frames() - shift);
+		} else if (required_range.second >= this_range.first && required_range.second < this_range.second) {
+			/* Trim end */
+			trimmed->set_frames (required_range.second - this_range.first);
+		}
+
+		data = trimmed;
+	}
+
+	do_process_audio (data);
+}
-- 
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