Move things round a bit.

1 files changed, 256 insertions, 0 deletions

diff --git a/src/lib/ffmpeg_decoder.cc b/src/lib/ffmpeg_decoder.cc
new file mode 100644
index 000000000..af258f381
--- /dev/null
+++ b/src/lib/ffmpeg_decoder.cc
@@ -0,0 +1,256 @@
+/*
+    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+/** @file  src/ffmpeg_decoder.cc
+ *  @brief A decoder using FFmpeg to decode content.
+ */
+
+#include <stdexcept>
+#include <vector>
+#include <sstream>
+#include <iomanip>
+#include <iostream>
+#include <stdint.h>
+extern "C" {
+#include <tiffio.h>
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+#include <libswscale/swscale.h>
+#include <libpostproc/postprocess.h>
+}
+#include <sndfile.h>
+#include "film.h"
+#include "format.h"
+#include "transcoder.h"
+#include "job.h"
+#include "filter.h"
+#include "film_state.h"
+#include "options.h"
+#include "exceptions.h"
+#include "image.h"
+#include "util.h"
+#include "log.h"
+#include "ffmpeg_decoder.h"
+
+using namespace std;
+using namespace boost;
+
+FFmpegDecoder::FFmpegDecoder (boost::shared_ptr<const FilmState> s, boost::shared_ptr<const Options> o, Job* j, Log* l, bool minimal, bool ignore_length)
+	: Decoder (s, o, j, l, minimal, ignore_length)
+	, _format_context (0)
+	, _video_stream (-1)
+	, _audio_stream (-1)
+	, _frame (0)
+	, _video_codec_context (0)
+	, _video_codec (0)
+	, _audio_codec_context (0)
+	, _audio_codec (0)
+{
+	setup_general ();
+	setup_video ();
+	setup_audio ();
+}
+
+FFmpegDecoder::~FFmpegDecoder ()
+{
+	if (_audio_codec_context) {
+		avcodec_close (_audio_codec_context);
+	}
+	
+	if (_video_codec_context) {
+		avcodec_close (_video_codec_context);
+	}
+	
+	av_free (_frame);
+	avformat_close_input (&_format_context);
+}	
+
+void
+FFmpegDecoder::setup_general ()
+{
+	int r;
+	
+	av_register_all ();
+
+	if ((r = avformat_open_input (&_format_context, _fs->content_path().c_str(), 0, 0)) != 0) {
+		throw OpenFileError (_fs->content_path ());
+	}
+
+	if (avformat_find_stream_info (_format_context, 0) < 0) {
+		throw DecodeError ("could not find stream information");
+	}
+
+	for (uint32_t i = 0; i < _format_context->nb_streams; ++i) {
+		if (_format_context->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+			_video_stream = i;
+		} else if (_format_context->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+			_audio_stream = i;
+		}
+	}
+
+	if (_video_stream < 0) {
+		throw DecodeError ("could not find video stream");
+	}
+	if (_audio_stream < 0) {
+		throw DecodeError ("could not find audio stream");
+	}
+
+	_frame = avcodec_alloc_frame ();
+	if (_frame == 0) {
+		throw DecodeError ("could not allocate frame");
+	}
+}
+
+void
+FFmpegDecoder::setup_video ()
+{
+	_video_codec_context = _format_context->streams[_video_stream]->codec;
+	_video_codec = avcodec_find_decoder (_video_codec_context->codec_id);
+
+	if (_video_codec == 0) {
+		throw DecodeError ("could not find video decoder");
+	}
+	
+	if (avcodec_open2 (_video_codec_context, _video_codec, 0) < 0) {
+		throw DecodeError ("could not open video decoder");
+	}
+}
+
+void
+FFmpegDecoder::setup_audio ()
+{
+	_audio_codec_context = _format_context->streams[_audio_stream]->codec;
+	_audio_codec = avcodec_find_decoder (_audio_codec_context->codec_id);
+
+	if (_audio_codec == 0) {
+		throw DecodeError ("could not find audio decoder");
+	}
+	
+	if (avcodec_open2 (_audio_codec_context, _audio_codec, 0) < 0) {
+		throw DecodeError ("could not open audio decoder");
+	}
+}
+
+bool
+FFmpegDecoder::do_pass ()
+{
+	int r = av_read_frame (_format_context, &_packet);
+	if (r < 0) {
+		return true;
+	}
+
+	if (_packet.stream_index == _video_stream && _opt->decode_video) {
+		
+		int frame_finished;
+		if (avcodec_decode_video2 (_video_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
+			process_video (_frame);
+		}
+
+	} else if (_packet.stream_index == _audio_stream && _opt->decode_audio) {
+		
+		avcodec_get_frame_defaults (_frame);
+		
+		int frame_finished;
+		if (avcodec_decode_audio4 (_audio_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
+			int const data_size = av_samples_get_buffer_size (
+				0, _audio_codec_context->channels, _frame->nb_samples, audio_sample_format (), 1
+				);
+
+			process_audio (_frame->data[0], _audio_codec_context->channels, data_size);
+		}
+	}
+	
+	av_free_packet (&_packet);
+	return false;
+}
+
+int
+FFmpegDecoder::length_in_frames () const
+{
+	return (_format_context->duration / AV_TIME_BASE) * frames_per_second ();
+}
+
+float
+FFmpegDecoder::frames_per_second () const
+{
+	return av_q2d (_format_context->streams[_video_stream]->avg_frame_rate);
+}
+
+int
+FFmpegDecoder::audio_channels () const
+{
+	if (_audio_codec_context == 0) {
+		return 0;
+	}
+	
+	return _audio_codec_context->channels;
+}
+
+int
+FFmpegDecoder::audio_sample_rate () const
+{
+	if (_audio_codec_context == 0) {
+		return 0;
+	}
+	
+	return _audio_codec_context->sample_rate;
+}
+
+AVSampleFormat
+FFmpegDecoder::audio_sample_format () const
+{
+	return _audio_codec_context->sample_fmt;
+}
+
+Size
+FFmpegDecoder::native_size () const
+{
+	return Size (_video_codec_context->width, _video_codec_context->height);
+}
+
+PixelFormat
+FFmpegDecoder::pixel_format () const
+{
+	return _video_codec_context->pix_fmt;
+}
+
+int
+FFmpegDecoder::time_base_numerator () const
+{
+	return _video_codec_context->time_base.num;
+}
+
+int
+FFmpegDecoder::time_base_denominator () const
+{
+	return _video_codec_context->time_base.den;
+}
+
+int
+FFmpegDecoder::sample_aspect_ratio_numerator () const
+{
+	return _video_codec_context->sample_aspect_ratio.num;
+}
+
+int
+FFmpegDecoder::sample_aspect_ratio_denominator () const
+{
+	return _video_codec_context->sample_aspect_ratio.den;
+}
+