public AudioFifo(AVSampleFormat format, int channels, int nbSamples = 1)
{
unsafe
{
pAudioFifo = ffmpeg.av_audio_fifo_alloc(format, channels, nbSamples <= 0 ? 1 : nbSamples);
}
}
public AudioFifoBuffer(AVSampleFormat sampleFormat, int numChannels, int initialSize = 1)
{
if ((audioFifo = ffmpeg.av_audio_fifo_alloc(sampleFormat, numChannels, initialSize)) == null)
{
Dispose();
throw new FFmpegException(ffmpeg.AVERROR(ffmpeg.ENOMEM), "Failed to allocate fifo buffer.");
}
}
public unsafe static void readFile(Openfile openFlie, AVAudioFifo *aVAudioFifo1) //解码
{
AVFrame *pFrame = ffmpeg.av_frame_alloc(); //接受解码后的数据
AVPacket packet;
ffmpeg.av_init_packet(&packet);
// while (_state == CaptureState.RUNNING)
while (true)
{
packet.data = null;
packet.size = 0;
if (ffmpeg.av_read_frame(openFlie._pFormatContext, &packet) < 0)
{
Console.WriteLine("嘟嘟去读完");
count++;
ffmpeg.av_packet_unref(&packet);
break;
}
//if (packet.stream_index == openFlie._streamIndex)
//{
//---- Console.WriteLine(packet.size);
int ret = ffmpeg.avcodec_send_packet(openFlie._pCodecContext, &packet);//发送解码数据
if (ret < 0)
{
Console.WriteLine("avcodec_send_packet failed");
break;
}
ffmpeg.avcodec_receive_frame(openFlie._pCodecContext, pFrame);// 接受解码后的数据
int fifo_mic_space = ffmpeg.av_audio_fifo_space(aVAudioFifo1);
while (fifo_mic_space < pFrame->nb_samples && _state == CaptureState.RUNNING)//样本数（nb_samples解码后一帧大小）
{
Console.WriteLine("_fifo_ full !\n");
fifo_mic_space = ffmpeg.av_audio_fifo_space(aVAudioFifo1);
}
if (fifo_mic_space >= pFrame->nb_samples)
{
int temp = ffmpeg.av_audio_fifo_space(aVAudioFifo1);
int temp2 = pFrame->nb_samples;
int nSizeOfPerson = Marshal.SizeOf(pFrame->data); //定义指针长度
IntPtr personX = Marshal.AllocHGlobal(nSizeOfPerson); //定义指针
Marshal.StructureToPtr(pFrame->data, personX, true); //将结构体person转为personX指针
int nWritten = ffmpeg.av_audio_fifo_write(aVAudioFifo1, (void **)personX, pFrame->nb_samples);
}
ffmpeg.av_packet_unref(&packet);
// }
}
ffmpeg.av_frame_free(&pFrame);
}
/**
* Load one audio frame from the FIFO buffer, encode and write it to the
* output file.
* @param fifo Buffer used for temporary storage
* @param output_format_context Format context of the output file
* @param output_codec_context Codec context of the output file
* @return Error code (0 if successful)
*/
int load_encode_and_write(AVAudioFifo *fifo,
AVFormatContext *output_format_context,
AVCodecContext *output_codec_context)
{
/* Temporary storage of the output samples of the frame written to the file. */
AVFrame *output_frame;
/* Use the maximum number of possible samples per frame.
* If there is less than the maximum possible frame size in the FIFO
* buffer use this number. Otherwise, use the maximum possible frame size. */
int frame_size = Math.Min(av_audio_fifo_size(fifo),
output_codec_context->frame_size);
int data_written;
/* Initialize temporary storage for one output frame. */
if (init_output_frame(&output_frame, output_codec_context, frame_size) < 0)
{
return(AVERROR_EXIT);
}
/* Read as many samples from the FIFO buffer as required to fill the frame.
* The samples are stored in the frame temporarily. */
byte *[] temp = output_frame->data;
fixed(byte **temp2 = temp)
{
if (av_audio_fifo_read(fifo, (void **)temp2, frame_size) < frame_size)
{
Console.WriteLine("error: Could not read data from FIFO");
av_frame_free(&output_frame);
return(AVERROR_EXIT);
}
}
/* Encode one frame worth of audio samples. */
if (encode_audio_frame(output_frame, output_format_context,
output_codec_context, &data_written) < 0)
{
av_frame_free(&output_frame);
return(AVERROR_EXIT);
}
av_frame_free(&output_frame);
return(0);
}
protected virtual void Dispose(bool disposing)
{
if (disposed)
{
return;
}
if (disposing)
{
// Dispose managed resources
}
// Dispose unmanaged resources
if (audioFifo != null)
{
ffmpeg.av_audio_fifo_free(audioFifo);
audioFifo = null;
}
disposed = true;
}
/**
* Add converted input audio samples to the FIFO buffer for later processing.
* @param fifo Buffer to add the samples to
* @param converted_input_samples Samples to be added. The dimensions are channel
* (for multi-channel audio), sample.
* @param frame_size Number of samples to be converted
* @return Error code (0 if successful)
*/
int add_samples_to_fifo(AVAudioFifo *fifo,
byte **converted_input_samples,
int frame_size)
{
int error;
/* Make the FIFO as large as it needs to be to hold both,
* the old and the new samples. */
if ((error = av_audio_fifo_realloc(fifo, av_audio_fifo_size(fifo) + frame_size)) < 0)
{
Console.WriteLine("error: Could not reallocate FIFO");
return(error);
}
/* Store the new samples in the FIFO buffer. */
if (av_audio_fifo_write(fifo, (void **)converted_input_samples,
frame_size) < frame_size)
{
Console.WriteLine("error: Could not write data to FIFO");
return(AVERROR_EXIT);
}
return(0);
}
public bool main(string inputFile, string outputFile)
{
AVFormatContext *input_format_context = null;
AVFormatContext *output_format_context = null;
AVCodecContext * input_codec_context = null;
AVCodecContext * output_codec_context = null;
SwrContext *resample_context = null;
AVAudioFifo *fifo = null;
bool ret = false;
/* Open the input file for reading. */
if (open_input_file(inputFile, &input_format_context,
&input_codec_context) < 0)
{
goto cleanup;
}
/* Open the output file for writing. */
if (open_output_file(outputFile, input_codec_context,
&output_format_context, &output_codec_context) < 0)
{
goto cleanup;
}
/* Initialize the resampler to be able to convert audio sample formats. */
if (init_resampler(input_codec_context, output_codec_context,
&resample_context) < 0)
{
goto cleanup;
}
/* Initialize the FIFO buffer to store audio samples to be encoded. */
if (init_fifo(&fifo, output_codec_context) < 0)
{
goto cleanup;
}
/* Write the header of the output file container. */
if (write_output_file_header(output_format_context) < 0)
{
goto cleanup;
}
/* Loop as long as we have input samples to read or output samples
* to write; abort as soon as we have neither. */
while (true)
{
/* Use the encoder's desired frame size for processing. */
int output_frame_size = output_codec_context->frame_size;
int finished = 0;
/* Make sure that there is one frame worth of samples in the FIFO
* buffer so that the encoder can do its work.
* Since the decoder's and the encoder's frame size may differ, we
* need to FIFO buffer to store as many frames worth of input samples
* that they make up at least one frame worth of output samples. */
while (av_audio_fifo_size(fifo) < output_frame_size)
{
/* Decode one frame worth of audio samples, convert it to the
* output sample format and put it into the FIFO buffer. */
if (read_decode_convert_and_store(fifo, input_format_context,
input_codec_context,
output_codec_context,
resample_context, &finished) < 0)
{
goto cleanup;
}
/* If we are at the end of the input file, we continue
* encoding the remaining audio samples to the output file. */
if (finished != 0)
{
break;
}
}
/* If we have enough samples for the encoder, we encode them.
* At the end of the file, we pass the remaining samples to
* the encoder. */
while (av_audio_fifo_size(fifo) >= output_frame_size ||
(finished != 0 && av_audio_fifo_size(fifo) > 0))
{
/* Take one frame worth of audio samples from the FIFO buffer,
* encode it and write it to the output file. */
if (load_encode_and_write(fifo, output_format_context,
output_codec_context) < 0)
{
goto cleanup;
}
}
/* If we are at the end of the input file and have encoded
* all remaining samples, we can exit this loop and finish. */
if (finished != 0)
{
int data_written;
/* Flush the encoder as it may have delayed frames. */
do
{
data_written = 0;
if (encode_audio_frame(null, output_format_context,
output_codec_context, &data_written) < 0)
{
goto cleanup;
}
} while (data_written != 0);
break;
}
}
/* Write the trailer of the output file container. */
if (write_output_file_trailer(output_format_context) < 0)
{
goto cleanup;
}
ret = true;
cleanup:
if (fifo != null)
{
av_audio_fifo_free(fifo);
}
swr_free(&resample_context);
if (output_codec_context != null)
{
avcodec_free_context(&output_codec_context);
}
if (output_format_context != null)
{
avio_closep(&output_format_context->pb);
avformat_free_context(output_format_context);
}
if (input_codec_context != null)
{
avcodec_free_context(&input_codec_context);
}
if (input_format_context != null)
{
avformat_close_input(&input_format_context);
}
return(ret);
}
/**
* Read one audio frame from the input file, decode, convert and store
* it in the FIFO buffer.
* @param fifo Buffer used for temporary storage
* @param input_format_context Format context of the input file
* @param input_codec_context Codec context of the input file
* @param output_codec_context Codec context of the output file
* @param resampler_context Resample context for the conversion
* @param[out] finished Indicates whether the end of file has
* been reached and all data has been
* decoded. If this flag is false,
* there is more data to be decoded,
* i.e., this function has to be called
* again.
* @return Error code (0 if successful)
*/
int read_decode_convert_and_store(AVAudioFifo *fifo,
AVFormatContext *input_format_context,
AVCodecContext *input_codec_context,
AVCodecContext *output_codec_context,
SwrContext *resampler_context,
int *finished)
{
/* Temporary storage of the input samples of the frame read from the file. */
AVFrame *input_frame = null;
/* Temporary storage for the converted input samples. */
byte **converted_input_samples = null;
int data_present = 0;
int ret = AVERROR_EXIT;
/* Initialize temporary storage for one input frame. */
if (init_input_frame(&input_frame) < 0)
{
goto cleanup;
}
/* Decode one frame worth of audio samples. */
if (decode_audio_frame(input_frame, input_format_context,
input_codec_context, &data_present, finished) < 0)
{
goto cleanup;
}
/* If we are at the end of the file and there are no more samples
* in the decoder which are delayed, we are actually finished.
* This must not be treated as an error. */
if (*finished != 0)
{
ret = 0;
goto cleanup;
}
/* If there is decoded data, convert and store it. */
if (data_present != 0)
{
/* Initialize the temporary storage for the converted input samples. */
if (init_converted_samples(&converted_input_samples, output_codec_context,
input_frame->nb_samples) < 0)
{
goto cleanup;
}
/* Convert the input samples to the desired output sample format.
* This requires a temporary storage provided by converted_input_samples. */
if (convert_samples(input_frame->extended_data, converted_input_samples,
input_frame->nb_samples, resampler_context) < 0)
{
goto cleanup;
}
/* Add the converted input samples to the FIFO buffer for later processing. */
if (add_samples_to_fifo(fifo, converted_input_samples,
input_frame->nb_samples) < 0)
{
goto cleanup;
}
ret = 0;
}
ret = 0;
cleanup:
if (converted_input_samples != null)
{
av_freep(&converted_input_samples[0]);
Marshal.FreeHGlobal((IntPtr)converted_input_samples);
}
av_frame_free(&input_frame);
return(ret);
}
public My2(AVFrame *pFrame, AVAudioFifo *aVAudioFifo)
{
this.pFrame = pFrame;
this.aVAudioFifo = aVAudioFifo;
}
public My(Openfile openfile, AVAudioFifo *aVAudioFifo)
{
this.openfile = openfile;
this.aVAudioFifo = aVAudioFifo;
}
unsafe static void Main(string[] args)
{
ffmpeg.RootPath = @"D:\cshapdemo\ConsoleApp1\ffmpeg";
var file1 = @"D:\cshapdemo\ConsoleApp1\会不会.mp3";
var file2 = @"D:\cshapdemo\ConsoleApp1\无人之岛-任然.mp3";
Openfile openfile1 = new Openfile();
Openfile openfile2 = new Openfile();
openfile1.open(file1);
openfile2.open(file2);
Openfile outfile = new Openfile();
outfile.OpenFileOutput(@"D:\cshapdemo\ConsoleApp1\3.mp3");
Console.WriteLine("eee");
AVAudioFifo *aVAudioFifo1 = ffmpeg.av_audio_fifo_alloc(
openfile1._pCodecContext->sample_fmt,
openfile1._pCodecContext->channels,
30 * openfile1._pCodecContext->frame_size);
AVAudioFifo *aVAudioFifo2 = ffmpeg.av_audio_fifo_alloc(
openfile2._pCodecContext->sample_fmt,
openfile2._pCodecContext->channels,
30 * openfile2._pCodecContext->frame_size);
//打开输入输出文件
Console.WriteLine("aVAudioFifo2 ");
// readFile(openfile1, aVAudioFifo1);
//配置过滤器
AVFilterGraph * _filter_graph = null;
AVFilterContext *_filter_ctx_src_spk = null;
AVFilterContext *_filter_ctx_src_mic = null;
AVFilterContext *_filter_ctx_sink = null;
string filter_desc = "[in0][in1]amix=inputs=2[out]";
// InitFilter(_filter_graph, filter_desc, _filter_ctx_src_spk, _filter_ctx_src_mic, _filter_ctx_sink, openfile1, openfile2, outfile);
MyFilter myFilter = new MyFilter();
myFilter.InitFilter(_filter_graph, filter_desc, _filter_ctx_src_spk, _filter_ctx_src_mic, _filter_ctx_sink, openfile1, openfile2, outfile);
//Thread thread1 = new Thread(start: new ThreadStart(new My(openfile1, aVAudioFifo1).C));
// Thread thread2 = new Thread(start: new ThreadStart(new My(openfile2, aVAudioFifo2).C));
readFile(openfile1, aVAudioFifo1);
readFile(openfile2, aVAudioFifo2);
if (count == 2)
{
Console.WriteLine("2222222222222222222");
}
int tmpFifoFailed = 0;
int frame_count = 0;
while (true)
{
AVFrame *pFrame_spk = ffmpeg.av_frame_alloc();
AVFrame *pFrame_mic = ffmpeg.av_frame_alloc();
AVPacket packet_out;
int got_packet_ptr = 0;
int fifo_spk_size = ffmpeg.av_audio_fifo_size(aVAudioFifo1);
int fifo_mic_size = ffmpeg.av_audio_fifo_size(aVAudioFifo2);
int frame_spk_min_size = openfile1._pFormatContext->streams[openfile1._streamIndex]->codecpar->frame_size;
int frame_mic_min_size = openfile2._pFormatContext->streams[openfile2._streamIndex]->codecpar->frame_size;
Console.WriteLine("fifo_spk_size:==" + fifo_spk_size);
if (fifo_spk_size >= frame_spk_min_size && fifo_mic_size >= frame_mic_min_size)
{
tmpFifoFailed = 0;
pFrame_spk->nb_samples = frame_spk_min_size;
pFrame_spk->channel_layout = openfile1._pFormatContext->streams[openfile1._streamIndex]->codecpar->channel_layout;
pFrame_spk->format = (int)openfile1._pFormatContext->streams[openfile1._streamIndex]->codec->sample_fmt;
pFrame_spk->sample_rate = openfile1._pFormatContext->streams[openfile1._streamIndex]->codecpar->sample_rate;
// pFrame_spk->format = 8;
int ret = ffmpeg.av_frame_get_buffer(pFrame_spk, 0);
if (ret < 0)
{
Console.WriteLine("av_frame_get_buffer pFrame_spk failed");
}
pFrame_mic->nb_samples = frame_mic_min_size;
pFrame_mic->channel_layout = openfile2._pFormatContext->streams[openfile2._streamIndex]->codecpar->channel_layout;
pFrame_mic->format = (int)openfile2._pFormatContext->streams[openfile2._streamIndex]->codec->sample_fmt;
//pFrame_mic->format = 4;
pFrame_mic->sample_rate = openfile2._pFormatContext->streams[openfile2._streamIndex]->codecpar->sample_rate;
ret = ffmpeg.av_frame_get_buffer(pFrame_mic, 0);
if (ret < 0)
{
Console.WriteLine("av_frame_get_buffer pFrame_mic failed");
}
int nSizeOfPerson = Marshal.SizeOf(pFrame_spk->data); //定义指针长度
IntPtr spkX = Marshal.AllocHGlobal(nSizeOfPerson); //定义指针
Marshal.StructureToPtr(pFrame_spk->data, spkX, true); //将结构体person转为personX指针
ret = ffmpeg.av_audio_fifo_read(aVAudioFifo1, (void **)spkX, frame_spk_min_size); //读取数据1
Thread.Sleep(1000);
int nSizeOfPerson2 = Marshal.SizeOf(pFrame_mic->data); //定义指针长度
IntPtr spkX2 = Marshal.AllocHGlobal(nSizeOfPerson2); //定义指针
Marshal.StructureToPtr(pFrame_mic->data, spkX2, true); //将结构体person转为personX指针
ret = ffmpeg.av_audio_fifo_read(aVAudioFifo2, (void **)spkX2, frame_mic_min_size); //读取数据2
// Thread thread1 = new Thread(start:new ThreadStart(new My2(pFrame_mic, aVAudioFifo2).C));
// pFrame_spk->pts = ffmpeg.av_frame_get_best_effort_timestamp(pFrame_spk);
// pFrame_mic->pts = ffmpeg.av_frame_get_best_effort_timestamp(pFrame_mic);
_filter_ctx_src_spk = myFilter._filter_ctx_src_spk;
_filter_ctx_src_mic = myFilter._filter_ctx_src_mic;
_filter_ctx_sink = myFilter._filter_ctx_sink;
ret = ffmpeg.av_buffersrc_add_frame(_filter_ctx_src_spk, pFrame_spk);//交给filter
if (ret < 0)
{
Console.WriteLine("Mixer: failed to call av_buffersrc_add_frame (speaker)\n");
break;
}
ret = ffmpeg.av_buffersrc_add_frame(_filter_ctx_src_mic, pFrame_mic);
if (ret < 0)
{
Console.WriteLine("Mixer: failed to call av_buffersrc_add_frame (mic)\n");
break;
}
//取出滤镜混合后的样本数据
//对数据进行编码后写入IO
//关闭资源关闭io
while (true)
{
AVFrame *pFrame_out = ffmpeg.av_frame_alloc();
ret = ffmpeg.av_buffersink_get_frame_flags(_filter_ctx_sink, pFrame_out, 0);
if (ret < 0)
{
var bufferSize = 1024;
var buffer = stackalloc byte[bufferSize];
ffmpeg.av_strerror(ret, buffer, (ulong)bufferSize);
var message = Marshal.PtrToStringAnsi((IntPtr)buffer);
Console.WriteLine("Mixer: failed to call av_buffersink_get_frame_flags\n" + message);
break;
}
if (pFrame_out->data[0] != null)
{
ffmpeg.av_init_packet(&packet_out);
packet_out.data = null;
packet_out.size = 0;
//ret=ffmpeg.avcodec_send_frame(outfile._pCodecContext, pFrame_out);
//if (ret < 0)
//{
// Console.WriteLine("Mixer: failed to call avcodec_send_frame pFrame_out \n");
// break;
//}
//ret=ffmpeg.avcodec_receive_packet(outfile._pCodecContext, &packet_out);
//if (ret < 0)
//{
// Console.WriteLine("Mixer: failed to call avcodec_send_frame packet_out \n");
// break;
//}
ret = ffmpeg.avcodec_encode_audio2(outfile._pCodecContext, &packet_out, pFrame_out, &got_packet_ptr);
if (ret < 0)
{
Console.WriteLine("Mixer: failed to call avcodec_decode_audio4\n");
break;
}
if (got_packet_ptr > 0)
{
packet_out.stream_index = outfile._streamIndex;
packet_out.pts = frame_count * outfile._pCodecContext->frame_size;
packet_out.dts = packet_out.pts;
packet_out.duration = outfile._pCodecContext->frame_size;
packet_out.pts = ffmpeg.av_rescale_q_rnd(packet_out.pts,
outfile._pCodecContext->time_base,
outfile._pCodecContext->time_base,
(AVRounding)(1 | 8192));
packet_out.dts = packet_out.pts;
packet_out.duration = ffmpeg.av_rescale_q_rnd(packet_out.duration,
outfile._pCodecContext->time_base,
outfile._pCodecContext->time_base,
(AVRounding)(1 | 8192));
frame_count++;
ret = ffmpeg.av_interleaved_write_frame(outfile._pFormatContext, &packet_out);
if (ret < 0)
{
Console.WriteLine("Mixer: failed to call av_interleaved_write_frame\n");
}
Console.WriteLine("Mixer: write frame to file\n");
}
ffmpeg.av_packet_unref(&packet_out);
}
ffmpeg.av_frame_free(&pFrame_out);
Thread.Sleep(1000);
}
Console.WriteLine("tmpFifoFailed:" + tmpFifoFailed);
}
else
{
Console.WriteLine("else tmpFifoFailed:" + tmpFifoFailed);
//===========================================================================
tmpFifoFailed++;
if (tmpFifoFailed > 300)
{
break;
}
ffmpeg.av_frame_free(&pFrame_spk);
ffmpeg.av_frame_free(&pFrame_mic);
}
}
ffmpeg.av_write_trailer(outfile._pFormatContext);
}
