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added decoding of avcodec

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This commit is contained in:
csoler 2015-08-19 22:17:50 -04:00
parent 043fe53789
commit 9798c78e20
2 changed files with 146 additions and 102 deletions
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133
plugins/VOIP/gui/VideoProcessor.cpp
View File

@ -481,76 +481,89 @@ float WaveletVideo::deserialise_ufloat(const unsigned char *mem)
FFmpegVideo::FFmpegVideo() FFmpegVideo::FFmpegVideo()
{ {
codec = NULL ; // Encoding
frame_buffer = NULL ;
context = NULL ; encoding_codec = NULL ;
encoding_frame_buffer = NULL ;
encoding_context = NULL ;
AVCodecID codec_id = AV_CODEC_ID_H264 ; // AV_CODEC_ID_MPEG1VIDEO AVCodecID codec_id = AV_CODEC_ID_H264 ; // AV_CODEC_ID_MPEG1VIDEO
uint8_t endcode[] = { 0, 0, 1, 0xb7 }; uint8_t endcode[] = { 0, 0, 1, 0xb7 };
/* find the mpeg1 video encoder */ /* find the mpeg1 video encoder */
codec = avcodec_find_encoder(codec_id); encoding_codec = avcodec_find_encoder(codec_id);
if (!codec) if (!encoding_codec) throw("AV codec not found for codec id ") ;
throw("AV codec not found for codec id ") ;
context = avcodec_alloc_context3(codec); encoding_context = avcodec_alloc_context3(encoding_codec);
if (!context) if (!encoding_context) throw std::runtime_error("AV: Could not allocate video codec encoding context");
throw std::runtime_error("AV: Could not allocate video codec context"); if (!decoding_context) throw std::runtime_error("AV: Could not allocate video codec decoding context");
/* put sample parameters */ /* put sample parameters */
context->bit_rate = 400000; encoding_context->bit_rate = 400000;
/* resolution must be a multiple of two */ /* resolution must be a multiple of two */
context->width = 352; encoding_context->width = 352;
context->height = 288; encoding_context->height = 288;
/* frames per second */ /* frames per second */
context->time_base = (AVRational){1,25}; encoding_context->time_base = (AVRational){1,25};
/* emit one intra frame every ten frames /* emit one intra frame every ten frames
* check frame pict_type before passing frame * check frame pict_type before passing frame
* to encoder, if frame->pict_type is AV_PICTURE_TYPE_I * to encoder, if frame->pict_type is AV_PICTURE_TYPE_I
* then gop_size is ignored and the output of encoder * then gop_size is ignored and the output of encoder
* will always be I frame irrespective to gop_size * will always be I frame irrespective to gop_size
*/ */
context->gop_size = 10; encoding_context->gop_size = 10;
context->max_b_frames = 1; encoding_context->max_b_frames = 1;
//context->pix_fmt = AV_PIX_FMT_RGB24; //context->pix_fmt = AV_PIX_FMT_RGB24;
context->pix_fmt = AV_PIX_FMT_YUV420P; encoding_context->pix_fmt = AV_PIX_FMT_YUV420P;
if (codec_id == AV_CODEC_ID_H264) if (codec_id == AV_CODEC_ID_H264)
av_opt_set(context->priv_data, "preset", "slow", 0); av_opt_set(encoding_context->priv_data, "preset", "slow", 0);
/* open it */ /* open it */
if (avcodec_open2(context, codec, NULL) < 0) if (avcodec_open2(encoding_context, encoding_codec, NULL) < 0)
throw std::runtime_error( "AV: Could not open codec context. Something's wrong."); throw std::runtime_error( "AV: Could not open codec context. Something's wrong.");
frame_buffer = (AVFrame*)malloc(sizeof(AVFrame)) ; encoding_frame_buffer = (AVFrame*)malloc(sizeof(AVFrame)) ;
frame_buffer->format = context->pix_fmt; encoding_frame_buffer->format = encoding_context->pix_fmt;
frame_buffer->width = context->width; encoding_frame_buffer->width = encoding_context->width;
frame_buffer->height = context->height; encoding_frame_buffer->height = encoding_context->height;
/* the image can be allocated by any means and av_image_alloc() is /* the image can be allocated by any means and av_image_alloc() is
* just the most convenient way if av_malloc() is to be used */ * just the most convenient way if av_malloc() is to be used */
int ret = av_image_alloc(frame_buffer->data, frame_buffer->linesize, context->width, context->height, context->pix_fmt, 32); int ret = av_image_alloc(encoding_frame_buffer->data, encoding_frame_buffer->linesize, encoding_context->width, encoding_context->height, encoding_context->pix_fmt, 32);
if (ret < 0) if (ret < 0)
throw std::runtime_error("AV: Could not allocate raw picture buffer"); throw std::runtime_error("AV: Could not allocate raw picture buffer");
frame_count = 0 ; encoding_frame_count = 0 ;
// Decoding
decoding_codec = avcodec_find_decoder(codec_id);
if (!decoding_codec)
throw("AV codec not found for codec id ") ;
decoding_context = avcodec_alloc_context3(decoding_codec);
} }
FFmpegVideo::~FFmpegVideo() FFmpegVideo::~FFmpegVideo()
{ {
avcodec_close(context); avcodec_close(encoding_context);
avcodec_close(decoding_context);
av_free(context); av_free(encoding_context);
av_free(decoding_context);
av_freep(&frame_buffer->data[0]); av_freep(&encoding_frame_buffer->data[0]);
av_freep(&decoding_frame_buffer->data[0]);
free(frame_buffer); free(encoding_frame_buffer);
free(decoding_frame_buffer);
} }
@ -563,15 +576,15 @@ bool FFmpegVideo::encodeData(const QImage& image,uint32_t size_hint,RsVOIPDataCh
QImage input ; QImage input ;
if(image.width() != frame_buffer->width || image.height() != frame_buffer->height) if(image.width() != encoding_frame_buffer->width || image.height() != encoding_frame_buffer->height)
input = image.scaled(QSize(frame_buffer->width,frame_buffer->height),Qt::IgnoreAspectRatio,Qt::SmoothTransformation) ; input = image.scaled(QSize(encoding_frame_buffer->width,encoding_frame_buffer->height),Qt::IgnoreAspectRatio,Qt::SmoothTransformation) ;
else else
input = image ; input = image ;
/* prepare a dummy image */ /* prepare a dummy image */
/* Y */ /* Y */
for (int y = 0; y < context->height; y++) for (int y = 0; y < encoding_context->height; y++)
for (int x = 0; x < context->width; x++) for (int x = 0; x < encoding_context->width; x++)
{ {
QRgb pix = image.pixel(QPoint(x,y)) ; QRgb pix = image.pixel(QPoint(x,y)) ;
@ -583,32 +596,32 @@ bool FFmpegVideo::encodeData(const QImage& image,uint32_t size_hint,RsVOIPDataCh
register int u = (0.439 * R) - (0.368 * G) - (0.071 * B) + 128 ; register int u = (0.439 * R) - (0.368 * G) - (0.071 * B) + 128 ;
register int v = -(0.148 * R) - (0.291 * G) + (0.439 * B) + 128 ; register int v = -(0.148 * R) - (0.291 * G) + (0.439 * B) + 128 ;
frame_buffer->data[0][y * frame_buffer->linesize[0] + x] = std::min(255,std::max(0,y)); // Y encoding_frame_buffer->data[0][y * encoding_frame_buffer->linesize[0] + x] = std::min(255,std::max(0,y)); // Y
frame_buffer->data[0][y * frame_buffer->linesize[0] + x] = std::min(255,std::max(0,u));// Cr encoding_frame_buffer->data[0][y * encoding_frame_buffer->linesize[0] + x] = std::min(255,std::max(0,u));// Cr
frame_buffer->data[0][y * frame_buffer->linesize[0] + x] = std::min(255,std::max(0,v));// Cb encoding_frame_buffer->data[0][y * encoding_frame_buffer->linesize[0] + x] = std::min(255,std::max(0,v));// Cb
} }
frame_buffer->pts = frame_count++; encoding_frame_buffer->pts = encoding_frame_count++;
/* encode the image */ /* encode the image */
int got_output = 0; int got_output = 0;
AVFrame *frame = frame_buffer ; AVFrame *frame = encoding_frame_buffer ;
// do // do
// { // {
int ret = avcodec_encode_video2(context, &pkt, frame, &got_output) ; int ret = avcodec_encode_video2(encoding_context, &pkt, frame, &got_output) ;
if (ret < 0) if (ret < 0)
{ {
std::cerr << "Error encoding frame!" << std::endl; std::cerr << "Error encoding frame!" << std::endl;
return false ; return false ;
} }
// frame = NULL ; // next attempts: do not encode anything. Do this to just flush the buffer // frame = NULL ; // next attempts: do not encode anything. Do this to just flush the buffer
// //
// } while(got_output) ; // } while(got_output) ;
if(got_output) if(got_output)
{ {
@ -637,6 +650,34 @@ bool FFmpegVideo::encodeData(const QImage& image,uint32_t size_hint,RsVOIPDataCh
} }
bool FFmpegVideo::decodeData(const RsVOIPDataChunk& chunk,QImage& image) bool FFmpegVideo::decodeData(const RsVOIPDataChunk& chunk,QImage& image)
{ {
AVPacket pkt ;
av_init_packet(&pkt);
pkt.data = static_cast<unsigned char*>(chunk.data); // packet data will be allocated by the encoder
pkt.size = chunk.size;
int got_frame = 0 ;
int len = avcodec_decode_video2(decoding_context,decoding_frame_buffer,&got_frame,&pkt) ;
if(!got_frame)
return true;
image = QImage(QSize(decoding_frame_buffer->width,decoding_frame_buffer->height),QImage::Format_ARGB32) ;
for (int y = 0; y < decoding_frame_buffer->height; y++)
for (int x = 0; x < decoding_frame_buffer->width; x++)
{
int Y = decoding_frame_buffer->data[0][y * decoding_frame_buffer->linesize[0] + x] ;
int U = decoding_frame_buffer->data[0][y * decoding_frame_buffer->linesize[0] + x] ;
int V = decoding_frame_buffer->data[0][y * decoding_frame_buffer->linesize[0] + x] ;
register int R = std::min(255,std::max(0,(int)(1.164*(Y - 16) + 1.596*(V - 128)))) ;
register int G = std::min(255,std::max(0,(int)(1.164*(Y - 16) - 0.813*(V - 128) - 0.391*(U - 128)))) ;
register int B = std::min(255,std::max(0,(int)(1.164*(Y - 16) + 2.018*(U - 128)
))) ;
image.setPixel(QPoint(x,y),QRgb( 0xff000000 + (R << 16) + (G << 8) + B)) ;
}
return true ; return true ;
} }

11
plugins/VOIP/gui/VideoProcessor.h
View File

@ -72,10 +72,13 @@ protected:
virtual bool decodeData(const RsVOIPDataChunk& chunk,QImage& image) ; virtual bool decodeData(const RsVOIPDataChunk& chunk,QImage& image) ;
private: private:
AVCodec *codec; AVCodec *encoding_codec;
AVCodecContext *context; AVCodec *decoding_codec;
AVFrame *frame_buffer ; AVCodecContext *encoding_context;
uint64_t frame_count ; AVCodecContext *decoding_context;
AVFrame *encoding_frame_buffer ;
AVFrame *decoding_frame_buffer ;
uint64_t encoding_frame_count ;
}; };
// This class decodes video from a stream. It keeps a queue of // This class decodes video from a stream. It keeps a queue of