1 files changed, 199 insertions, 0 deletions
diff --git a/testint.c b/testint.c
new file mode 100644
index 0000000..6521ba3
--- /dev/null
+++ b/testint.c
@@ -0,0 +1,199 @@
+extern "C" {
+	#include "libavcodec/avcodec.h"
+	#include "libavformat/avformat.h"
+	#include "libavutil/opt.h"
+	#include "libavutil/channel_layout.h"
+	#include "libavutil/common.h"
+	#include "libavutil/imgutils.h"
+	#include "libavutil/mathematics.h"
+	#include "libavutil/samplefmt.h"
+	
+	#include <libavutil/imgutils.h>
+	#include <libavutil/samplefmt.h>
+	//#include <libavutil/timestamp.h>
+}
+
+#include <libavutil/imgutils.h>
+#include <libavutil/samplefmt.h>
+
+#include <iostream>
+#include <fstream>
+
+
+int main(int argc, char** argv)
+{
+	av_register_all();
+	
+	if (argc<1) {
+		cerr<< "use: test audiofile" << endl;
+		return 1;
+	}
+
+
+	AVFrame* frame = avcodec_alloc_frame();
+	if (!frame)
+	{
+		std::cout << "Error allocating the frame" << std::endl;
+		return false;
+	}
+
+	AVFormatContext* formatContext = NULL;
+	if (avformat_open_input(&formatContext, filename.c_str(), NULL, NULL) != 0)
+	{
+		av_free(frame);
+		std::cout << "Error opening the file" << std::endl;
+		return false;
+	}
+
+
+	if (avformat_find_stream_info(formatContext, NULL) < 0)
+	{
+		av_free(frame);
+		av_close_input_file(formatContext);
+		std::cout << "Error finding the stream info" << std::endl;
+		return false;
+	}
+
+	AVStream* audioStream = NULL;
+	// Find the audio stream (some container files can have multiple streams in them)
+	for (unsigned int i = 0; i < formatContext->nb_streams; ++i)
+	{
+		if (formatContext->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
+		{
+			audioStream = formatContext->streams[i];
+			break;
+		}
+	}
+
+	if (audioStream == NULL)
+	{
+		av_free(frame);
+		av_close_input_file(formatContext);
+		std::cout << "Could not find any audio stream in the file" << std::endl;
+		return false;
+	}
+
+	AVCodecContext* codecContext = audioStream->codec;
+
+	codecContext->codec = avcodec_find_decoder(codecContext->codec_id);
+	if (codecContext->codec == NULL)
+	{
+		av_free(frame);
+		av_close_input_file(formatContext);
+		std::cout << "Couldn't find a proper decoder" << std::endl;
+		return false;
+	}
+	else if (avcodec_open2(codecContext, codecContext->codec, NULL) != 0)
+	{
+		av_free(frame);
+		av_close_input_file(formatContext);
+		std::cout << "Couldn't open the context with the decoder" << std::endl;
+		return false;
+	}
+	
+		/*
+	
+	//
+	// why is the file truncated???
+	//if(codecContext->codec->capabilities & CODEC_CAP_TRUNCATED) codecContext->codec->capabilities|=CODEC_FLAG_TRUNCATED;
+	//
+	//
+
+	av_dump_format(formatContext, 0, 0, false); //avformat.h line 1256
+	int samples = ((formatContext->duration + 5000)*codecContext->sample_rate)/AV_TIME_BASE;
+
+	std::cout << "This stream has " << codecContext->channels << " channels, a sample rate of " << codecContext->sample_rate << "Hz and "<<samples <<" samples" << std::endl;
+	std::cout << "The data is in format " <<codecContext->sample_fmt<< " (aka "<< av_get_sample_fmt_name(codecContext->sample_fmt) << ") "<<std::endl;
+
+	//we can now tell the processors the format
+	//we can work out the number of samples at this point
+
+	for (auto p: processors) {
+		p->init(codecContext->channels,16,samples);
+	}
+
+	AVPacket packet;
+	av_init_packet(&packet);
+	int sample_processed=0;
+	
+	bool diag=true;
+
+	// Read the packets in a loop
+	while (true)
+	//while(sample_processed<samples)
+	{
+		int ret=av_read_frame(formatContext, &packet);
+		if (ret<0) {
+			cerr << "finished with code "<<ret <<(ret==AVERROR_EOF?" ,EOF":"")<<endl;
+			break;
+		}
+		//av_read_frame(formatContext, &packet); //hangs once the packets have been read
+		if (packet.stream_index == audioStream->index)
+		{
+			// Try to decode the packet into a frame
+			int frameFinished = 0;
+			int bytes = avcodec_decode_audio4(codecContext, frame, &frameFinished, &packet);
+
+			// Some frames rely on multiple packets, so we have to make sure the frame is finished before
+			// we can use it
+			if (frameFinished)
+			{
+				// frame now has usable audio data in it. How it's stored in the frame depends on the format of
+				// the audio. If it's packed audio, all the data will be in frame->data[0]. If it's in planar format,
+				// the data will be in frame->data and possibly frame->extended_data. Look at frame->data, frame->nb_samples,
+				// frame->linesize, and other related fields on the FFmpeg docs. I don't know how you're actually using
+				// the audio data, so I won't add any junk here that might confuse you. Typically, if I want to find
+				// documentation on an FFmpeg structure or function, I just type "<name> doxygen" into google (like
+				// "AVFrame doxygen" for AVFrame's docs)
+				
+				//av_get_channel_layout_string (char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
+				
+				if (diag) {
+					cerr << "first frame: "<<bytes << ", "<<frame->nb_samples<<" samples in "<<av_get_sample_fmt_name(frame->format)<<" format with channel layout "<<frame->channel_layout<<  std::endl;
+					diag=false;
+				}
+
+				//std::cout << "Got a frame: bytes " << bytes << ", "<<frame->nb_samples<<" samples"<<std::endl;
+				//now we can pass the data to the processor(s)
+				for (auto p: processors) {
+					sample_processed=p->process_frame(frame->data[0],frame->nb_samples);
+				}
+				
+				mutex.lock();
+				progress=((double)sample_processed)/samples;
+				mutex.unlock();
+			}
+		}
+		// You *must* call av_free_packet() after each call to av_read_frame() or else you'll leak memory
+		av_free_packet(&packet);  //crashes here!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! SIGSEV In _int_free (av=0xb4600010, p=0xb46025c8, have_lock=0) at malloc.c:4085 ()
+	}
+
+	// Some codecs will cause frames to be buffered up in the decoding process. If the CODEC_CAP_DELAY flag
+	// is set, there can be buffered up frames that need to be flushed, so we'll do that
+	if (codecContext->codec->capabilities & CODEC_CAP_DELAY)
+	{
+		av_init_packet(&packet);
+		// Decode all the remaining frames in the buffer, until the end is reached
+		int frameFinished = 0;
+		int bytes = avcodec_decode_audio4(codecContext, frame, &frameFinished, &packet);
+		while (bytes >= 0 && frameFinished)
+		{
+			for (auto p: processors) {
+				p->process_frame(frame->data[0],frame->nb_samples);
+			}
+			mutex.lock();
+			progress=((double)sample_processed)/samples;
+			mutex.unlock();
+		}
+	}
+	
+	cerr << "finished processed: "<<sample_processed << " samples of  "<<samples<<" , "<<((double)sample_processed*100)/samples<<"%"<<  std::endl;
+		*/			
+
+	// Clean up!
+	av_free(frame);
+	avcodec_close(codecContext);
+	av_close_input_file(formatContext);
+
+	return 0;
+}