-/*\r
-* copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
-*\r
-* This file is part of CasparCG.\r
-*\r
-* CasparCG is free software: you can redistribute it and/or modify\r
-* it under the terms of the GNU General Public License as published by\r
-* the Free Software Foundation, either version 3 of the License, or\r
-* (at your option) any later version.\r
-*\r
-* CasparCG is distributed in the hope that it will be useful,\r
-* but WITHOUT ANY WARRANTY; without even the implied warranty of\r
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
-* GNU General Public License for more details.\r
-\r
-* You should have received a copy of the GNU General Public License\r
-* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
-*\r
-*/\r
-#include "../../stdafx.h"\r
-\r
-#include "audio_decoder.h"\r
-\r
-#if defined(_MSC_VER)\r
-#pragma warning (push)\r
-#pragma warning (disable : 4244)\r
-#endif\r
-extern "C" \r
-{\r
- #define __STDC_CONSTANT_MACROS\r
- #define __STDC_LIMIT_MACROS\r
- #include <libavformat/avformat.h>\r
- #include <libavcodec/avcodec.h>\r
-}\r
-#if defined(_MSC_VER)\r
-#pragma warning (pop)\r
-#endif\r
-\r
-namespace caspar {\r
-\r
-struct audio_decoder::implementation : boost::noncopyable\r
-{ \r
- AVCodecContext& codec_context_;\r
- \r
- const core::video_format_desc format_desc_;\r
-\r
- std::vector<short> current_chunk_;\r
-\r
- std::vector<std::vector<short>> chunks_;\r
-\r
-public:\r
- explicit implementation(AVCodecContext& codec_context, const core::video_format_desc& format_desc) \r
- : codec_context_(codec_context)\r
- , format_desc_(format_desc) \r
- {\r
- if(codec_context_.sample_rate != static_cast<int>(format_desc_.audio_sample_rate) || \r
- codec_context_.channels != static_cast<int>(format_desc_.audio_channels))\r
- { \r
- BOOST_THROW_EXCEPTION(\r
- file_read_error() <<\r
- msg_info("Invalid sample-rate or number of channels.") <<\r
- arg_value_info(boost::lexical_cast<std::string>(codec_context_.sample_rate)) << \r
- arg_name_info("codec_context"));\r
- }\r
- }\r
- \r
- void push(std::shared_ptr<AVPacket>&& audio_packet)\r
- { \r
- if(!audio_packet)\r
- return;\r
- \r
- if(audio_packet->size == 0)\r
- {\r
- avcodec_flush_buffers(&codec_context_);\r
- return;\r
- }\r
-\r
- auto s = current_chunk_.size();\r
- current_chunk_.resize(s + 4*format_desc_.audio_sample_rate*2+FF_INPUT_BUFFER_PADDING_SIZE/2);\r
- \r
- int written_bytes = (current_chunk_.size() - s)*2 - FF_INPUT_BUFFER_PADDING_SIZE;\r
- const int errn = avcodec_decode_audio3(&codec_context_, ¤t_chunk_[s], &written_bytes, audio_packet.get());\r
- if(errn < 0)\r
- { \r
- BOOST_THROW_EXCEPTION(\r
- invalid_operation() <<\r
- boost::errinfo_api_function("avcodec_decode_audio2") <<\r
- boost::errinfo_errno(AVUNERROR(errn)));\r
- }\r
-\r
- current_chunk_.resize(s + written_bytes/2);\r
-\r
- const auto last = current_chunk_.end() - current_chunk_.size() % format_desc_.audio_samples_per_frame;\r
- \r
- for(auto it = current_chunk_.begin(); it != last; it += format_desc_.audio_samples_per_frame) \r
- chunks_.push_back(std::vector<short>(it, it + format_desc_.audio_samples_per_frame)); \r
-\r
- current_chunk_.erase(current_chunk_.begin(), last);\r
- }\r
-\r
- bool empty() const\r
- {\r
- return chunks_.empty();\r
- }\r
-\r
- std::vector<short> front()\r
- {\r
- return chunks_.front();\r
- }\r
-\r
- void pop()\r
- {\r
- chunks_.pop_back();\r
- }\r
-};\r
-\r
-audio_decoder::audio_decoder(AVCodecContext& codec_context, const core::video_format_desc& format_desc) : impl_(new implementation(codec_context, format_desc)){}\r
-void audio_decoder::push(std::shared_ptr<AVPacket>&& audio_packet){impl_->push(std::move(audio_packet));}\r
-bool audio_decoder::empty() const {return impl_->empty();}\r
-std::vector<short> audio_decoder::front() {return impl_->front();}\r
-void audio_decoder::pop(){impl_->pop();}\r
-}
\ No newline at end of file
+/*
+* Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
+*
+* This file is part of CasparCG (www.casparcg.com).
+*
+* CasparCG 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 3 of the License, or
+* (at your option) any later version.
+*
+* CasparCG 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 CasparCG. If not, see <http://www.gnu.org/licenses/>.
+*
+* Author: Robert Nagy, ronag89@gmail.com
+*/
+
+#include "../../stdafx.h"
+
+#include "audio_decoder.h"
+
+#include "../util/util.h"
+#include "../input/input.h"
+#include "../../ffmpeg_error.h"
+
+#include <core/video_format.h>
+
+#include <common/log.h>
+
+#include <tbb/cache_aligned_allocator.h>
+
+#include <queue>
+
+#if defined(_MSC_VER)
+#pragma warning (push)
+#pragma warning (disable : 4244)
+#endif
+extern "C"
+{
+ #include <libavformat/avformat.h>
+ #include <libavcodec/avcodec.h>
+ #include <libswresample/swresample.h>
+}
+#if defined(_MSC_VER)
+#pragma warning (pop)
+#endif
+
+namespace caspar { namespace ffmpeg {
+
+uint64_t get_channel_layout(AVCodecContext* dec)
+{
+ auto layout = (dec->channel_layout && dec->channels == av_get_channel_layout_nb_channels(dec->channel_layout)) ? dec->channel_layout : av_get_default_channel_layout(dec->channels);
+ return layout;
+}
+
+struct audio_decoder::impl : boost::noncopyable
+{
+ monitor::basic_subject event_subject_;
+ input* input_;
+ int index_;
+ const spl::shared_ptr<AVCodecContext> codec_context_;
+ const core::video_format_desc format_desc_;
+
+ std::shared_ptr<SwrContext> swr_;
+
+ std::vector<uint8_t, tbb::cache_aligned_allocator<int8_t>> buffer_;
+
+ std::shared_ptr<AVPacket> current_packet_;
+
+public:
+ explicit impl(input& in, const core::video_format_desc& format_desc)
+ : input_(&in)
+ , format_desc_(format_desc)
+ , codec_context_(open_codec(input_->context(), AVMEDIA_TYPE_AUDIO, index_))
+ , swr_(swr_alloc_set_opts(nullptr,
+ av_get_default_channel_layout(format_desc_.audio_channels), AV_SAMPLE_FMT_S32, format_desc_.audio_sample_rate,
+ get_channel_layout(codec_context_.get()), codec_context_->sample_fmt, codec_context_->sample_rate,
+ 0, nullptr), [](SwrContext* p){swr_free(&p);})
+ , buffer_(AVCODEC_MAX_AUDIO_FRAME_SIZE*4)
+ {
+ if(!swr_)
+ CASPAR_THROW_EXCEPTION(bad_alloc());
+
+ THROW_ON_ERROR2(swr_init(swr_.get()), "[audio_decoder]");
+ }
+
+ std::shared_ptr<AVFrame> poll()
+ {
+ if(!current_packet_ && !input_->try_pop_audio(current_packet_))
+ return nullptr;
+
+ std::shared_ptr<AVFrame> audio;
+
+ if(!current_packet_)
+ {
+ avcodec_flush_buffers(codec_context_.get());
+ }
+ else if(!current_packet_->data)
+ {
+ if(codec_context_->codec->capabilities & CODEC_CAP_DELAY)
+ audio = decode(*current_packet_);
+
+ if(!audio)
+ current_packet_.reset();
+ }
+ else
+ {
+ audio = decode(*current_packet_);
+
+ if(current_packet_->size == 0)
+ current_packet_.reset();
+ }
+
+ return audio ? audio : poll();
+ }
+
+ std::shared_ptr<AVFrame> decode(AVPacket& pkt)
+ {
+ auto frame = create_frame();
+
+ int got_frame = 0;
+ auto len = THROW_ON_ERROR2(avcodec_decode_audio4(codec_context_.get(), frame.get(), &got_frame, &pkt), "[audio_decoder]");
+
+ if(len == 0)
+ {
+ pkt.size = 0;
+ return nullptr;
+ }
+
+ pkt.data += len;
+ pkt.size -= len;
+
+ if(!got_frame)
+ return nullptr;
+
+ const uint8_t *in[] = {frame->data[0]};
+ uint8_t* out[] = {buffer_.data()};
+
+ auto channel_samples = swr_convert(swr_.get(),
+ out, static_cast<int>(buffer_.size()) / format_desc_.audio_channels / av_get_bytes_per_sample(AV_SAMPLE_FMT_S32),
+ in, frame->nb_samples);
+
+ frame->data[0] = buffer_.data();
+ frame->linesize[0] = channel_samples * format_desc_.audio_channels * av_get_bytes_per_sample(AV_SAMPLE_FMT_S32);
+ frame->nb_samples = channel_samples;
+ frame->format = AV_SAMPLE_FMT_S32;
+
+ event_subject_ << monitor::event("file/audio/sample-rate") % codec_context_->sample_rate
+ << monitor::event("file/audio/channels") % codec_context_->channels
+ << monitor::event("file/audio/format") % u8(av_get_sample_fmt_name(codec_context_->sample_fmt))
+ << monitor::event("file/audio/codec") % u8(codec_context_->codec->long_name);
+
+ return frame;
+ }
+
+ uint32_t nb_frames() const
+ {
+ return 0;
+ }
+
+ std::wstring print() const
+ {
+ return L"[audio-decoder] " + u16(codec_context_->codec->long_name);
+ }
+};
+
+audio_decoder::audio_decoder(input& input, const core::video_format_desc& format_desc) : impl_(new impl(input, format_desc)){}
+audio_decoder::audio_decoder(audio_decoder&& other) : impl_(std::move(other.impl_)){}
+audio_decoder& audio_decoder::operator=(audio_decoder&& other){impl_ = std::move(other.impl_); return *this;}
+std::shared_ptr<AVFrame> audio_decoder::operator()(){return impl_->poll();}
+uint32_t audio_decoder::nb_frames() const{return impl_->nb_frames();}
+std::wstring audio_decoder::print() const{return impl_->print();}
+void audio_decoder::subscribe(const monitor::observable::observer_ptr& o){impl_->event_subject_.subscribe(o);}
+void audio_decoder::unsubscribe(const monitor::observable::observer_ptr& o){impl_->event_subject_.unsubscribe(o);}
+
+}}
\ No newline at end of file